/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ // vim:cindent:ts=2:et:sw=2: /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* * construction of a frame tree that is nearly isomorphic to the content * tree and updating of that tree in response to dynamic changes */ #include "nsCSSFrameConstructor.h" #include "mozilla/AutoRestore.h" #include "mozilla/DebugOnly.h" #include "mozilla/dom/HTMLSelectElement.h" #include "mozilla/EventStates.h" #include "mozilla/Likely.h" #include "mozilla/LinkedList.h" #include "nsAbsoluteContainingBlock.h" #include "nsIAtom.h" #include "nsIFrameInlines.h" #include "nsGkAtoms.h" #include "nsPresContext.h" #include "nsIDocument.h" #include "nsTableFrame.h" #include "nsTableColFrame.h" #include "nsTableRowFrame.h" #include "nsTableCellFrame.h" #include "nsIDOMHTMLDocument.h" #include "nsHTMLParts.h" #include "nsPresShell.h" #include "nsIPresShell.h" #include "nsUnicharUtils.h" #include "nsStyleSet.h" #include "nsViewManager.h" #include "nsStyleConsts.h" #include "nsIDOMXULElement.h" #include "nsContainerFrame.h" #include "nsNameSpaceManager.h" #include "nsIComboboxControlFrame.h" #include "nsIListControlFrame.h" #include "nsIDOMCharacterData.h" #include "nsPlaceholderFrame.h" #include "nsTableRowGroupFrame.h" #include "nsIFormControl.h" #include "nsCSSAnonBoxes.h" #include "nsTextFragment.h" #include "nsIAnonymousContentCreator.h" #include "nsBindingManager.h" #include "nsXBLBinding.h" #include "nsContentUtils.h" #include "nsIScriptError.h" #ifdef XP_MACOSX #include "nsIDocShell.h" #endif #include "ChildIterator.h" #include "nsError.h" #include "nsLayoutUtils.h" #include "nsAutoPtr.h" #include "nsBoxFrame.h" #include "nsBoxLayout.h" #include "nsFlexContainerFrame.h" #include "nsGridContainerFrame.h" #include "RubyUtils.h" #include "nsRubyFrame.h" #include "nsRubyBaseFrame.h" #include "nsRubyBaseContainerFrame.h" #include "nsRubyTextFrame.h" #include "nsRubyTextContainerFrame.h" #include "nsImageFrame.h" #include "nsIObjectLoadingContent.h" #include "nsTArray.h" #include "nsGenericDOMDataNode.h" #include "mozilla/dom/Element.h" #include "nsAutoLayoutPhase.h" #include "nsStyleStructInlines.h" #include "nsPageContentFrame.h" #include "RestyleManager.h" #include "StickyScrollContainer.h" #include "nsFieldSetFrame.h" #include "nsInlineFrame.h" #include "nsBlockFrame.h" #include "nsCanvasFrame.h" #include "nsFirstLetterFrame.h" #include "nsGfxScrollFrame.h" #include "nsPageFrame.h" #include "nsSimplePageSequenceFrame.h" #include "nsTableOuterFrame.h" #include "nsIScrollableFrame.h" #include "nsTransitionManager.h" #ifdef MOZ_XUL #include "nsIRootBox.h" #endif #ifdef ACCESSIBILITY #include "nsAccessibilityService.h" #endif #include "nsXBLService.h" #undef NOISY_FIRST_LETTER #include "nsMathMLParts.h" #include "mozilla/dom/SVGTests.h" #include "nsSVGUtils.h" #include "nsRefreshDriver.h" #include "nsRuleProcessorData.h" #include "nsTextNode.h" #include "ActiveLayerTracker.h" using namespace mozilla; using namespace mozilla::dom; // An alias for convenience. static const nsIFrame::ChildListID kPrincipalList = nsIFrame::kPrincipalList; nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewHTMLVideoFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewSVGOuterSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewSVGOuterSVGAnonChildFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGPathGeometryFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGGenericContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGSwitchFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGTextFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGViewFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGLinearGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGRadialGradientFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGStopFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewSVGMarkerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewSVGMarkerAnonChildFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); extern nsIFrame* NS_NewSVGImageFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGClipPathFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFilterFrame(nsIPresShell *aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGPatternFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSVGFEUnstyledLeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); #include "mozilla/dom/NodeInfo.h" #include "prenv.h" #include "nsNodeInfoManager.h" #include "nsContentCreatorFunctions.h" #ifdef DEBUG // Set the environment variable GECKO_FRAMECTOR_DEBUG_FLAGS to one or // more of the following flags (comma separated) for handy debug // output. static bool gNoisyContentUpdates = false; static bool gReallyNoisyContentUpdates = false; static bool gNoisyInlineConstruction = false; struct FrameCtorDebugFlags { const char* name; bool* on; }; static FrameCtorDebugFlags gFlags[] = { { "content-updates", &gNoisyContentUpdates }, { "really-noisy-content-updates", &gReallyNoisyContentUpdates }, { "noisy-inline", &gNoisyInlineConstruction } }; #define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0])) #endif #ifdef MOZ_XUL #include "nsMenuFrame.h" #include "nsPopupSetFrame.h" #include "nsTreeColFrame.h" #include "nsIBoxObject.h" #include "nsPIListBoxObject.h" #include "nsListBoxBodyFrame.h" #include "nsListItemFrame.h" #include "nsXULLabelFrame.h" //------------------------------------------------------------------ nsIFrame* NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewRootBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsContainerFrame* NS_NewDocElementBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewThumbFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewDeckFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewLeafBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewStackFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewRangeFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewImageBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTextBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewGroupBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewButtonBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewSplitterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuPopupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewPopupSetFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewMenuFrame (nsIPresShell* aPresShell, nsStyleContext* aContext, uint32_t aFlags); nsIFrame* NS_NewMenuBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewTreeBodyFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); // grid nsresult NS_NewGridLayout2 ( nsIPresShell* aPresShell, nsBoxLayout** aNewLayout ); nsIFrame* NS_NewGridRowLeafFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewGridRowGroupFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); // end grid nsIFrame* NS_NewTitleBarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewResizerFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #endif nsHTMLScrollFrame* NS_NewHTMLScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot); nsXULScrollFrame* NS_NewXULScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot, bool aClipAllDescendants); nsIFrame* NS_NewSliderFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); nsIFrame* NS_NewScrollbarButtonFrame (nsIPresShell* aPresShell, nsStyleContext* aContext); #ifdef NOISY_FINDFRAME static int32_t FFWC_totalCount=0; static int32_t FFWC_doLoop=0; static int32_t FFWC_doSibling=0; static int32_t FFWC_recursions=0; static int32_t FFWC_nextInFlows=0; #endif // Returns true if aFrame is an anonymous flex/grid item. static inline bool IsAnonymousFlexOrGridItem(const nsIFrame* aFrame) { const nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo(); return pseudoType == nsCSSAnonBoxes::anonymousFlexItem || pseudoType == nsCSSAnonBoxes::anonymousGridItem; } // Returns true if aFrame is a flex/grid container. static inline bool IsFlexOrGridContainer(const nsIFrame* aFrame) { const nsIAtom* t = aFrame->GetType(); return t == nsGkAtoms::flexContainerFrame || t == nsGkAtoms::gridContainerFrame; } #if DEBUG static void AssertAnonymousFlexOrGridItemParent(const nsIFrame* aChild, const nsIFrame* aParent) { MOZ_ASSERT(IsAnonymousFlexOrGridItem(aChild), "expected an anonymous flex or grid item child frame"); MOZ_ASSERT(aParent, "expected a parent frame"); const nsIAtom* pseudoType = aChild->StyleContext()->GetPseudo(); if (pseudoType == nsCSSAnonBoxes::anonymousFlexItem) { MOZ_ASSERT(aParent->GetType() == nsGkAtoms::flexContainerFrame, "anonymous flex items should only exist as children " "of flex container frames"); } else { MOZ_ASSERT(aParent->GetType() == nsGkAtoms::gridContainerFrame, "anonymous grid items should only exist as children " "of grid container frames"); } } #else #define AssertAnonymousFlexOrGridItemParent(x, y) do { /* nothing */ } while(0) #endif static inline nsContainerFrame* GetFieldSetBlockFrame(nsIFrame* aFieldsetFrame) { // Depends on the fieldset child frame order - see ConstructFieldSetFrame() below. nsIFrame* firstChild = aFieldsetFrame->GetFirstPrincipalChild(); nsIFrame* inner = firstChild && firstChild->GetNextSibling() ? firstChild->GetNextSibling() : firstChild; return inner ? inner->GetContentInsertionFrame() : nullptr; } #define FCDATA_DECL(_flags, _func) \ { _flags, { (FrameCreationFunc)_func }, nullptr, nullptr } #define FCDATA_WITH_WRAPPING_BLOCK(_flags, _func, _anon_box) \ { _flags | FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS, \ { (FrameCreationFunc)_func }, nullptr, &_anon_box } //---------------------------------------------------------------------- /** * True if aFrame is an actual inline frame in the sense of non-replaced * display:inline CSS boxes. In other words, it can be affected by {ib} * splitting and can contain first-letter frames. Basically, this is either an * inline frame (positioned or otherwise) or an line frame (this last because * it can contain first-letter and because inserting blocks in the middle of it * needs to terminate it). */ static bool IsInlineFrame(const nsIFrame* aFrame) { return aFrame->IsFrameOfType(nsIFrame::eLineParticipant); } /** * True if aFrame is an instance of an SVG frame class or is an inline/block * frame being used for SVG text. */ static bool IsFrameForSVG(const nsIFrame* aFrame) { return aFrame->IsFrameOfType(nsIFrame::eSVG) || aFrame->IsSVGText(); } /** * Returns true iff aFrame explicitly prevents its descendants from floating * (at least, down to the level of descendants which themselves are * float-containing blocks -- those will manage the floating status of any * lower-level descendents inside them, of course). */ static bool ShouldSuppressFloatingOfDescendants(nsIFrame* aFrame) { return aFrame->IsFrameOfType(nsIFrame::eMathML) || aFrame->IsBoxFrame() || ::IsFlexOrGridContainer(aFrame); } /** * If any children require a block parent, return the first such child. * Otherwise return null. */ static nsIContent* AnyKidsNeedBlockParent(nsIFrame *aFrameList) { for (nsIFrame *k = aFrameList; k; k = k->GetNextSibling()) { // Line participants, such as text and inline frames, can't be // directly inside a XUL box; they must be wrapped in an // intermediate block. if (k->IsFrameOfType(nsIFrame::eLineParticipant)) { return k->GetContent(); } } return nullptr; } // Reparent a frame into a wrapper frame that is a child of its old parent. static void ReparentFrame(RestyleManager* aRestyleManager, nsContainerFrame* aNewParentFrame, nsIFrame* aFrame) { aFrame->SetParent(aNewParentFrame); aRestyleManager->ReparentStyleContext(aFrame); } static void ReparentFrames(nsCSSFrameConstructor* aFrameConstructor, nsContainerFrame* aNewParentFrame, const nsFrameList& aFrameList) { RestyleManager* restyleManager = aFrameConstructor->RestyleManager(); for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) { ReparentFrame(restyleManager, aNewParentFrame, e.get()); } } //---------------------------------------------------------------------- // // When inline frames get weird and have block frames in them, we // annotate them to help us respond to incremental content changes // more easily. static inline bool IsFramePartOfIBSplit(nsIFrame* aFrame) { return (aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) != 0; } static nsContainerFrame* GetIBSplitSibling(nsIFrame* aFrame) { NS_PRECONDITION(IsFramePartOfIBSplit(aFrame), "Shouldn't call this"); // We only store the "ib-split sibling" annotation with the first // frame in the continuation chain. Walk back to find that frame now. return static_cast (aFrame->FirstContinuation()-> Properties().Get(nsIFrame::IBSplitSibling())); } static nsContainerFrame* GetIBSplitPrevSibling(nsIFrame* aFrame) { NS_PRECONDITION(IsFramePartOfIBSplit(aFrame), "Shouldn't call this"); // We only store the ib-split sibling annotation with the first // frame in the continuation chain. Walk back to find that frame now. return static_cast (aFrame->FirstContinuation()-> Properties().Get(nsIFrame::IBSplitPrevSibling())); } static nsContainerFrame* GetLastIBSplitSibling(nsIFrame* aFrame, bool aReturnEmptyTrailingInline) { for (nsIFrame *frame = aFrame, *next; ; frame = next) { next = GetIBSplitSibling(frame); if (!next || (!aReturnEmptyTrailingInline && !next->GetFirstPrincipalChild() && !GetIBSplitSibling(next))) { NS_ASSERTION(!next || !frame->IsInlineOutside(), "Should have a block here!"); return static_cast(frame); } } NS_NOTREACHED("unreachable code"); return nullptr; } static void SetFrameIsIBSplit(nsContainerFrame* aFrame, nsIFrame* aIBSplitSibling) { NS_PRECONDITION(aFrame, "bad args!"); // We should be the only continuation NS_ASSERTION(!aFrame->GetPrevContinuation(), "assigning ib-split sibling to other than first continuation!"); NS_ASSERTION(!aFrame->GetNextContinuation() || IsFramePartOfIBSplit(aFrame->GetNextContinuation()), "should have no non-ib-split continuations here"); // Mark the frame as ib-split. aFrame->AddStateBits(NS_FRAME_PART_OF_IBSPLIT); if (aIBSplitSibling) { NS_ASSERTION(!aIBSplitSibling->GetPrevContinuation(), "assigning something other than the first continuation as the " "ib-split sibling"); // Store the ib-split sibling (if we were given one) with the // first frame in the flow. FramePropertyTable* props = aFrame->PresContext()->PropertyTable(); props->Set(aFrame, nsIFrame::IBSplitSibling(), aIBSplitSibling); props->Set(aIBSplitSibling, nsIFrame::IBSplitPrevSibling(), aFrame); } } static nsIFrame* GetIBContainingBlockFor(nsIFrame* aFrame) { NS_PRECONDITION(IsFramePartOfIBSplit(aFrame), "GetIBContainingBlockFor() should only be called on known IB frames"); // Get the first "normal" ancestor of the target frame. nsIFrame* parentFrame; do { parentFrame = aFrame->GetParent(); if (! parentFrame) { NS_ERROR("no unsplit block frame in IB hierarchy"); return aFrame; } // Note that we ignore non-ib-split frames which have a pseudo on their // style context -- they're not the frames we're looking for! In // particular, they may be hiding a real parent that _is_ in an ib-split. if (!IsFramePartOfIBSplit(parentFrame) && !parentFrame->StyleContext()->GetPseudo()) break; aFrame = parentFrame; } while (1); // post-conditions NS_ASSERTION(parentFrame, "no normal ancestor found for ib-split frame " "in GetIBContainingBlockFor"); NS_ASSERTION(parentFrame != aFrame, "parentFrame is actually the child frame - bogus reslt"); return parentFrame; } //---------------------------------------------------------------------- // Block/inline frame construction logic. We maintain a few invariants here: // // 1. Block frames contain block and inline frames. // // 2. Inline frames only contain inline frames. If an inline parent has a block // child then the block child is migrated upward until it lands in a block // parent (the inline frames containing block is where it will end up). // After this function returns, aLink is pointing to the first link at or // after its starting position for which the next frame is a block. If there // is no such link, it points to the end of the list. static void FindFirstBlock(nsFrameList::FrameLinkEnumerator& aLink) { for ( ; !aLink.AtEnd(); aLink.Next()) { if (!aLink.NextFrame()->IsInlineOutside()) { return; } } } // This function returns a frame link enumerator pointing to the first link in // the list for which the next frame is not block. If there is no such link, // it points to the end of the list. static nsFrameList::FrameLinkEnumerator FindFirstNonBlock(const nsFrameList& aList) { nsFrameList::FrameLinkEnumerator link(aList); for (; !link.AtEnd(); link.Next()) { if (link.NextFrame()->IsInlineOutside()) { break; } } return link; } inline void SetInitialSingleChild(nsContainerFrame* aParent, nsIFrame* aFrame) { NS_PRECONDITION(!aFrame->GetNextSibling(), "Should be using a frame list"); nsFrameList temp(aFrame, aFrame); aParent->SetInitialChildList(kPrincipalList, temp); } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. struct nsFrameItems : public nsFrameList { // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); }; void nsFrameItems::AddChild(nsIFrame* aChild) { NS_PRECONDITION(aChild, "nsFrameItems::AddChild"); // It'd be really nice if we could just AppendFrames(kPrincipalList, aChild) here, // but some of our callers put frames that have different // parents (caption, I'm looking at you) on the same framelist, and // nsFrameList asserts if you try to do that. if (IsEmpty()) { SetFrames(aChild); } else { NS_ASSERTION(aChild != mLastChild, "Same frame being added to frame list twice?"); mLastChild->SetNextSibling(aChild); mLastChild = nsLayoutUtils::GetLastSibling(aChild); } } // ----------------------------------------------------------- // Structure used when constructing formatting object trees. Contains // state information needed for absolutely positioned elements struct nsAbsoluteItems : nsFrameItems { // containing block for absolutely positioned elements nsContainerFrame* containingBlock; explicit nsAbsoluteItems(nsContainerFrame* aContainingBlock); #ifdef DEBUG // XXXbz Does this need a debug-only assignment operator that nulls out the // childList in the nsAbsoluteItems we're copying? Introducing a difference // between debug and non-debug behavior seems bad, so I guess not... ~nsAbsoluteItems() { NS_ASSERTION(!FirstChild(), "Dangling child list. Someone forgot to insert it?"); } #endif // Appends the frame to the end of the list void AddChild(nsIFrame* aChild); }; nsAbsoluteItems::nsAbsoluteItems(nsContainerFrame* aContainingBlock) : containingBlock(aContainingBlock) { } // Additional behavior is that it sets the frame's NS_FRAME_OUT_OF_FLOW flag void nsAbsoluteItems::AddChild(nsIFrame* aChild) { NS_ASSERTION(aChild->PresContext()->FrameManager()-> GetPlaceholderFrameFor(aChild), "Child without placeholder being added to nsAbsoluteItems?"); aChild->AddStateBits(NS_FRAME_OUT_OF_FLOW); nsFrameItems::AddChild(aChild); } // ----------------------------------------------------------- // Structure for saving the existing state when pushing/poping containing // blocks. The destructor restores the state to its previous state class MOZ_STACK_CLASS nsFrameConstructorSaveState { public: typedef nsIFrame::ChildListID ChildListID; nsFrameConstructorSaveState(); ~nsFrameConstructorSaveState(); private: nsAbsoluteItems* mItems; // pointer to struct whose data we save/restore nsAbsoluteItems mSavedItems; // copy of original data // The name of the child list in which our frames would belong ChildListID mChildListID; nsFrameConstructorState* mState; // State used only when we're saving the abs-pos state for a transformed // element. nsAbsoluteItems mSavedFixedItems; bool mSavedFixedPosIsAbsPos; friend class nsFrameConstructorState; }; // Structure used to keep track of a list of bindings we need to call // AddToAttachedQueue on. These should be in post-order depth-first // flattened tree traversal order. struct PendingBinding : public LinkedListElement { #ifdef NS_BUILD_REFCNT_LOGGING PendingBinding() { MOZ_COUNT_CTOR(PendingBinding); } ~PendingBinding() { MOZ_COUNT_DTOR(PendingBinding); } #endif RefPtr mBinding; }; // Structure used for maintaining state information during the // frame construction process class MOZ_STACK_CLASS nsFrameConstructorState { public: typedef nsIFrame::ChildListID ChildListID; nsPresContext *mPresContext; nsIPresShell *mPresShell; nsFrameManager *mFrameManager; #ifdef MOZ_XUL // Frames destined for the kPopupList. nsAbsoluteItems mPopupItems; #endif // Containing block information for out-of-flow frames. nsAbsoluteItems mFixedItems; nsAbsoluteItems mAbsoluteItems; nsAbsoluteItems mFloatedItems; // Items in the top layer are always fixed positioned children of the // viewport frame. It differs from mFixedItems that the items here // should not be caught by any other fixed-pos containing block like // frames with transform or filter. nsAbsoluteItems mTopLayerItems; nsCOMPtr mFrameState; // These bits will be added to the state bits of any frame we construct // using this state. nsFrameState mAdditionalStateBits; // When working with the transform and filter properties, we want to hook // the abs-pos and fixed-pos lists together, since such // elements are fixed-pos containing blocks. This flag determines // whether or not we want to wire the fixed-pos and abs-pos lists // together. bool mFixedPosIsAbsPos; // A boolean to indicate whether we have a "pending" popupgroup. That is, we // have already created the FrameConstructionItem for the root popupgroup but // we have not yet created the relevant frame. bool mHavePendingPopupgroup; // If false (which is the default) then call SetPrimaryFrame() as needed // during frame construction. If true, don't make any SetPrimaryFrame() // calls, except for generated content which doesn't have a primary frame // yet. The mCreatingExtraFrames == true mode is meant to be used for // construction of random "extra" frames for elements via normal frame // construction APIs (e.g. replication of things across pages in paginated // mode). bool mCreatingExtraFrames; nsCOMArray mGeneratedTextNodesWithInitializer; TreeMatchContext mTreeMatchContext; // Constructor // Use the passed-in history state. nsFrameConstructorState( nsIPresShell* aPresShell, nsContainerFrame* aFixedContainingBlock, nsContainerFrame* aAbsoluteContainingBlock, nsContainerFrame* aFloatContainingBlock, already_AddRefed aHistoryState); // Get the history state from the pres context's pres shell. nsFrameConstructorState(nsIPresShell* aPresShell, nsContainerFrame* aFixedContainingBlock, nsContainerFrame* aAbsoluteContainingBlock, nsContainerFrame* aFloatContainingBlock); ~nsFrameConstructorState(); // Function to push the existing absolute containing block state and // create a new scope. Code that uses this function should get matching // logic in GetAbsoluteContainingBlock. // Also makes aNewAbsoluteContainingBlock the containing block for // fixed-pos elements if necessary. // aPositionedFrame is the frame whose style actually makes // aNewAbsoluteContainingBlock a containing block. E.g. for a scrollable element // aPositionedFrame is the element's primary frame and // aNewAbsoluteContainingBlock is the scrolled frame. void PushAbsoluteContainingBlock(nsContainerFrame* aNewAbsoluteContainingBlock, nsIFrame* aPositionedFrame, nsFrameConstructorSaveState& aSaveState); // Function to push the existing float containing block state and // create a new scope. Code that uses this function should get matching // logic in GetFloatContainingBlock. // Pushing a null float containing block forbids any frames from being // floated until a new float containing block is pushed. // XXX we should get rid of null float containing blocks and teach the // various frame classes to deal with floats instead. void PushFloatContainingBlock(nsContainerFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState); // Function to return the proper geometric parent for a frame with display // struct given by aStyleDisplay and parent's frame given by // aContentParentFrame. nsContainerFrame* GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsContainerFrame* aContentParentFrame) const; /** * Function to add a new frame to the right frame list. This MUST be called * on frames before their children have been processed if the frames might * conceivably be out-of-flow; otherwise cleanup in error cases won't work * right. Also, this MUST be called on frames after they have been * initialized. * @param aNewFrame the frame to add * @param aFrameItems the list to add in-flow frames to * @param aContent the content pointer for aNewFrame * @param aStyleContext the style context resolved for aContent * @param aParentFrame the parent frame for the content if it were in-flow * @param aCanBePositioned pass false if the frame isn't allowed to be * positioned * @param aCanBeFloated pass false if the frame isn't allowed to be * floated * @param aIsOutOfFlowPopup pass true if the frame is an out-of-flow popup * (XUL-only) */ void AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsContainerFrame* aParentFrame, bool aCanBePositioned = true, bool aCanBeFloated = true, bool aIsOutOfFlowPopup = false, bool aInsertAfter = false, nsIFrame* aInsertAfterFrame = nullptr); /** * Function to return the fixed-pos element list. Normally this will just hand back the * fixed-pos element list, but in case we're dealing with a transformed element that's * acting as an abs-pos and fixed-pos container, we'll hand back the abs-pos list. Callers should * use this function if they want to get the list acting as the fixed-pos item parent. */ nsAbsoluteItems& GetFixedItems() { return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems; } const nsAbsoluteItems& GetFixedItems() const { return mFixedPosIsAbsPos ? mAbsoluteItems : mFixedItems; } /** * class to automatically push and pop a pending binding in the frame * constructor state. See nsCSSFrameConstructor::FrameConstructionItem * mPendingBinding documentation. */ class PendingBindingAutoPusher; friend class PendingBindingAutoPusher; class MOZ_STACK_CLASS PendingBindingAutoPusher { public: PendingBindingAutoPusher(nsFrameConstructorState& aState, PendingBinding* aPendingBinding) : mState(aState), mPendingBinding(aState.mCurrentPendingBindingInsertionPoint) { if (aPendingBinding) { aState.mCurrentPendingBindingInsertionPoint = aPendingBinding; } } ~PendingBindingAutoPusher() { mState.mCurrentPendingBindingInsertionPoint = mPendingBinding; } private: nsFrameConstructorState& mState; PendingBinding* mPendingBinding; }; /** * Add a new pending binding to the list */ void AddPendingBinding(PendingBinding* aPendingBinding) { if (mCurrentPendingBindingInsertionPoint) { mCurrentPendingBindingInsertionPoint->setPrevious(aPendingBinding); } else { mPendingBindings.insertBack(aPendingBinding); } } protected: friend class nsFrameConstructorSaveState; /** * ProcessFrameInsertions takes the frames in aFrameItems and adds them as * kids to the aChildListID child list of |aFrameItems.containingBlock|. */ void ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, ChildListID aChildListID); /** * GetOutOfFlowFrameItems selects the out-of-flow frame list the new * frame should be added to. If the frame shouldn't be added to any * out-of-flow list, it returns nullptr. The corresponding type of * placeholder is also returned via the aPlaceholderType parameter * if this method doesn't return nullptr. The caller should check * whether the returned list really has a containing block. */ nsAbsoluteItems* GetOutOfFlowFrameItems(nsIFrame* aNewFrame, bool aCanBePositioned, bool aCanBeFloated, bool aIsOutOfFlowPopup, nsFrameState* aPlaceholderType); // Our list of all pending bindings. When we're done, we need to call // AddToAttachedQueue on all of them, in order. LinkedList mPendingBindings; PendingBinding* mCurrentPendingBindingInsertionPoint; }; nsFrameConstructorState::nsFrameConstructorState( nsIPresShell* aPresShell, nsContainerFrame* aFixedContainingBlock, nsContainerFrame* aAbsoluteContainingBlock, nsContainerFrame* aFloatContainingBlock, already_AddRefed aHistoryState) : mPresContext(aPresShell->GetPresContext()), mPresShell(aPresShell), mFrameManager(aPresShell->FrameManager()), #ifdef MOZ_XUL mPopupItems(nullptr), #endif mFixedItems(aFixedContainingBlock), mAbsoluteItems(aAbsoluteContainingBlock), mFloatedItems(aFloatContainingBlock), mTopLayerItems(do_QueryFrame(mFrameManager->GetRootFrame())), // See PushAbsoluteContaningBlock below mFrameState(aHistoryState), mAdditionalStateBits(nsFrameState(0)), // If the fixed-pos containing block is equal to the abs-pos containing // block, use the abs-pos containing block's abs-pos list for fixed-pos // frames. mFixedPosIsAbsPos(aFixedContainingBlock == aAbsoluteContainingBlock), mHavePendingPopupgroup(false), mCreatingExtraFrames(false), mTreeMatchContext(true, nsRuleWalker::eRelevantLinkUnvisited, aPresShell->GetDocument()), mCurrentPendingBindingInsertionPoint(nullptr) { #ifdef MOZ_XUL nsIRootBox* rootBox = nsIRootBox::GetRootBox(aPresShell); if (rootBox) { mPopupItems.containingBlock = rootBox->GetPopupSetFrame(); } #endif MOZ_COUNT_CTOR(nsFrameConstructorState); } nsFrameConstructorState::nsFrameConstructorState(nsIPresShell* aPresShell, nsContainerFrame* aFixedContainingBlock, nsContainerFrame* aAbsoluteContainingBlock, nsContainerFrame* aFloatContainingBlock) : nsFrameConstructorState(aPresShell, aFixedContainingBlock, aAbsoluteContainingBlock, aFloatContainingBlock, aPresShell->GetDocument()->GetLayoutHistoryState()) { } nsFrameConstructorState::~nsFrameConstructorState() { MOZ_COUNT_DTOR(nsFrameConstructorState); // Items in the top layer are fixed positioned children of the viewport frame. ProcessFrameInsertions(mTopLayerItems, nsIFrame::kFixedList); ProcessFrameInsertions(mFloatedItems, nsIFrame::kFloatList); ProcessFrameInsertions(mAbsoluteItems, nsIFrame::kAbsoluteList); ProcessFrameInsertions(mFixedItems, nsIFrame::kFixedList); #ifdef MOZ_XUL ProcessFrameInsertions(mPopupItems, nsIFrame::kPopupList); #endif for (int32_t i = mGeneratedTextNodesWithInitializer.Count() - 1; i >= 0; --i) { mGeneratedTextNodesWithInitializer[i]-> DeleteProperty(nsGkAtoms::genConInitializerProperty); } if (!mPendingBindings.isEmpty()) { nsBindingManager* bindingManager = mPresShell->GetDocument()->BindingManager(); do { nsAutoPtr pendingBinding; pendingBinding = mPendingBindings.popFirst(); bindingManager->AddToAttachedQueue(pendingBinding->mBinding); } while (!mPendingBindings.isEmpty()); mCurrentPendingBindingInsertionPoint = nullptr; } } static nsContainerFrame* AdjustAbsoluteContainingBlock(nsContainerFrame* aContainingBlockIn) { if (!aContainingBlockIn) { return nullptr; } // Always use the container's first continuation. (Inline frames can have // non-fluid bidi continuations...) return static_cast(aContainingBlockIn->FirstContinuation()); } void nsFrameConstructorState::PushAbsoluteContainingBlock(nsContainerFrame* aNewAbsoluteContainingBlock, nsIFrame* aPositionedFrame, nsFrameConstructorSaveState& aSaveState) { aSaveState.mItems = &mAbsoluteItems; aSaveState.mSavedItems = mAbsoluteItems; aSaveState.mChildListID = nsIFrame::kAbsoluteList; aSaveState.mState = this; aSaveState.mSavedFixedPosIsAbsPos = mFixedPosIsAbsPos; if (mFixedPosIsAbsPos) { // Since we're going to replace mAbsoluteItems, we need to save it into // mFixedItems now (and save the current value of mFixedItems). aSaveState.mSavedFixedItems = mFixedItems; mFixedItems = mAbsoluteItems; } mAbsoluteItems = nsAbsoluteItems(AdjustAbsoluteContainingBlock(aNewAbsoluteContainingBlock)); /* See if we're wiring the fixed-pos and abs-pos lists together. This happens iff * we're a transformed element. */ mFixedPosIsAbsPos = aPositionedFrame && aPositionedFrame->StyleDisplay()->IsFixedPosContainingBlock(aPositionedFrame); if (aNewAbsoluteContainingBlock) { aNewAbsoluteContainingBlock->MarkAsAbsoluteContainingBlock(); } } void nsFrameConstructorState::PushFloatContainingBlock(nsContainerFrame* aNewFloatContainingBlock, nsFrameConstructorSaveState& aSaveState) { NS_PRECONDITION(!aNewFloatContainingBlock || aNewFloatContainingBlock->IsFloatContainingBlock(), "Please push a real float containing block!"); NS_ASSERTION(!aNewFloatContainingBlock || !ShouldSuppressFloatingOfDescendants(aNewFloatContainingBlock), "We should not push a frame that is supposed to _suppress_ " "floats as a float containing block!"); aSaveState.mItems = &mFloatedItems; aSaveState.mSavedItems = mFloatedItems; aSaveState.mChildListID = nsIFrame::kFloatList; aSaveState.mState = this; mFloatedItems = nsAbsoluteItems(aNewFloatContainingBlock); } nsContainerFrame* nsFrameConstructorState::GetGeometricParent(const nsStyleDisplay* aStyleDisplay, nsContainerFrame* aContentParentFrame) const { NS_PRECONDITION(aStyleDisplay, "Must have display struct!"); // If there is no container for a fixed, absolute, or floating root // frame, we will ignore the positioning. This hack is originally // brought to you by the letter T: tables, since other roots don't // even call into this code. See bug 178855. // // XXX Disabling positioning in this case is a hack. If one was so inclined, // one could support this either by (1) inserting a dummy block between the // table and the canvas or (2) teaching the canvas how to reflow positioned // elements. (1) has the usual problems when multiple frames share the same // content (notice all the special cases in this file dealing with inner // tables and outer tables which share the same content). (2) requires some // work and possible factoring. // // XXXbz couldn't we just force position to "static" on roots and // float to "none"? That's OK per CSS 2.1, as far as I can tell. if (aContentParentFrame && aContentParentFrame->IsSVGText()) { return aContentParentFrame; } if (aStyleDisplay->IsFloatingStyle() && mFloatedItems.containingBlock) { NS_ASSERTION(!aStyleDisplay->IsAbsolutelyPositionedStyle(), "Absolutely positioned _and_ floating?"); return mFloatedItems.containingBlock; } if (aStyleDisplay->mTopLayer != NS_STYLE_TOP_LAYER_NONE) { MOZ_ASSERT(aStyleDisplay->mTopLayer == NS_STYLE_TOP_LAYER_TOP, "-moz-top-layer should be either none or top"); MOZ_ASSERT(mTopLayerItems.containingBlock, "No root frame?"); MOZ_ASSERT(aStyleDisplay->IsAbsolutelyPositionedStyle(), "Top layer items should always be absolutely positioned"); return mTopLayerItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_ABSOLUTE && mAbsoluteItems.containingBlock) { return mAbsoluteItems.containingBlock; } if (aStyleDisplay->mPosition == NS_STYLE_POSITION_FIXED && GetFixedItems().containingBlock) { return GetFixedItems().containingBlock; } return aContentParentFrame; } nsAbsoluteItems* nsFrameConstructorState::GetOutOfFlowFrameItems(nsIFrame* aNewFrame, bool aCanBePositioned, bool aCanBeFloated, bool aIsOutOfFlowPopup, nsFrameState* aPlaceholderType) { #ifdef MOZ_XUL if (MOZ_UNLIKELY(aIsOutOfFlowPopup)) { MOZ_ASSERT(mPopupItems.containingBlock, "Must have a popup set frame!"); *aPlaceholderType = PLACEHOLDER_FOR_POPUP; return &mPopupItems; } #endif // MOZ_XUL if (aCanBeFloated && aNewFrame->IsFloating()) { *aPlaceholderType = PLACEHOLDER_FOR_FLOAT; return &mFloatedItems; } if (aCanBePositioned) { const nsStyleDisplay* disp = aNewFrame->StyleDisplay(); if (disp->mTopLayer != NS_STYLE_TOP_LAYER_NONE) { *aPlaceholderType = PLACEHOLDER_FOR_FIXEDPOS; return &mTopLayerItems; } if (disp->mPosition == NS_STYLE_POSITION_ABSOLUTE) { *aPlaceholderType = PLACEHOLDER_FOR_ABSPOS; return &mAbsoluteItems; } if (disp->mPosition == NS_STYLE_POSITION_FIXED) { *aPlaceholderType = PLACEHOLDER_FOR_FIXEDPOS; return &GetFixedItems(); } } return nullptr; } void nsFrameConstructorState::AddChild(nsIFrame* aNewFrame, nsFrameItems& aFrameItems, nsIContent* aContent, nsStyleContext* aStyleContext, nsContainerFrame* aParentFrame, bool aCanBePositioned, bool aCanBeFloated, bool aIsOutOfFlowPopup, bool aInsertAfter, nsIFrame* aInsertAfterFrame) { NS_PRECONDITION(!aNewFrame->GetNextSibling(), "Shouldn't happen"); nsFrameState placeholderType; nsAbsoluteItems* outOfFlowFrameItems = GetOutOfFlowFrameItems(aNewFrame, aCanBePositioned, aCanBeFloated, aIsOutOfFlowPopup, &placeholderType); // The comments in GetGeometricParent regarding root table frames // all apply here, unfortunately. Thus, we need to check whether // the returned frame items really has containing block. nsFrameItems* frameItems; if (outOfFlowFrameItems && outOfFlowFrameItems->containingBlock) { MOZ_ASSERT(aNewFrame->GetParent() == outOfFlowFrameItems->containingBlock, "Parent of the frame is not the containing block?"); frameItems = outOfFlowFrameItems; } else { frameItems = &aFrameItems; placeholderType = nsFrameState(0); } if (placeholderType) { NS_ASSERTION(frameItems != &aFrameItems, "Putting frame in-flow _and_ want a placeholder?"); nsIFrame* placeholderFrame = nsCSSFrameConstructor::CreatePlaceholderFrameFor(mPresShell, aContent, aNewFrame, aStyleContext, aParentFrame, nullptr, placeholderType); placeholderFrame->AddStateBits(mAdditionalStateBits); // Add the placeholder frame to the flow aFrameItems.AddChild(placeholderFrame); } #ifdef DEBUG else { NS_ASSERTION(aNewFrame->GetParent() == aParentFrame, "In-flow frame has wrong parent"); } #endif if (aInsertAfter) { frameItems->InsertFrame(nullptr, aInsertAfterFrame, aNewFrame); } else { frameItems->AddChild(aNewFrame); } } void nsFrameConstructorState::ProcessFrameInsertions(nsAbsoluteItems& aFrameItems, ChildListID aChildListID) { #define NS_NONXUL_LIST_TEST (&aFrameItems == &mFloatedItems && \ aChildListID == nsIFrame::kFloatList) || \ (&aFrameItems == &mAbsoluteItems && \ aChildListID == nsIFrame::kAbsoluteList) || \ ((&aFrameItems == &mFixedItems || \ &aFrameItems == &mTopLayerItems) && \ aChildListID == nsIFrame::kFixedList) #ifdef MOZ_XUL NS_PRECONDITION(NS_NONXUL_LIST_TEST || (&aFrameItems == &mPopupItems && aChildListID == nsIFrame::kPopupList), "Unexpected aFrameItems/aChildListID combination"); #else NS_PRECONDITION(NS_NONXUL_LIST_TEST, "Unexpected aFrameItems/aChildListID combination"); #endif if (aFrameItems.IsEmpty()) { return; } nsContainerFrame* containingBlock = aFrameItems.containingBlock; NS_ASSERTION(containingBlock, "Child list without containing block?"); if (aChildListID == nsIFrame::kFixedList) { // Put this frame on the transformed-frame's abs-pos list instead, if // it has abs-pos children instead of fixed-pos children. aChildListID = containingBlock->GetAbsoluteListID(); } // Insert the frames hanging out in aItems. We can use SetInitialChildList() // if the containing block hasn't been reflowed yet (so NS_FRAME_FIRST_REFLOW // is set) and doesn't have any frames in the aChildListID child list yet. const nsFrameList& childList = containingBlock->GetChildList(aChildListID); if (childList.IsEmpty() && (containingBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { // If we're injecting absolutely positioned frames, inject them on the // absolute containing block if (aChildListID == containingBlock->GetAbsoluteListID()) { containingBlock->GetAbsoluteContainingBlock()-> SetInitialChildList(containingBlock, aChildListID, aFrameItems); } else { containingBlock->SetInitialChildList(aChildListID, aFrameItems); } } else if (aChildListID == nsIFrame::kFixedList || aChildListID == nsIFrame::kAbsoluteList) { // The order is not important for abs-pos/fixed-pos frame list, just // append the frame items to the list directly. mFrameManager->AppendFrames(containingBlock, aChildListID, aFrameItems); } else { // Note that whether the frame construction context is doing an append or // not is not helpful here, since it could be appending to some frame in // the middle of the document, which means we're not necessarily // appending to the children of the containing block. // // We need to make sure the 'append to the end of document' case is fast. // So first test the last child of the containing block nsIFrame* lastChild = childList.LastChild(); // CompareTreePosition uses placeholder hierarchy for out of flow frames, // so this will make out-of-flows respect the ordering of placeholders, // which is great because it takes care of anonymous content. nsIFrame* firstNewFrame = aFrameItems.FirstChild(); // Cache the ancestor chain so that we can reuse it if needed. nsAutoTArray firstNewFrameAncestors; nsIFrame* notCommonAncestor = nullptr; if (lastChild) { notCommonAncestor = nsLayoutUtils::FillAncestors(firstNewFrame, containingBlock, &firstNewFrameAncestors); } if (!lastChild || nsLayoutUtils::CompareTreePosition(lastChild, firstNewFrame, firstNewFrameAncestors, notCommonAncestor ? containingBlock : nullptr) < 0) { // no lastChild, or lastChild comes before the new children, so just append mFrameManager->AppendFrames(containingBlock, aChildListID, aFrameItems); } else { // Try the other children. First collect them to an array so that a // reasonable fast binary search can be used to find the insertion point. nsAutoTArray children; for (nsIFrame* f = childList.FirstChild(); f != lastChild; f = f->GetNextSibling()) { children.AppendElement(f); } nsIFrame* insertionPoint = nullptr; int32_t imin = 0; int32_t max = children.Length(); while (max > imin) { int32_t imid = imin + ((max - imin) / 2); nsIFrame* f = children[imid]; int32_t compare = nsLayoutUtils::CompareTreePosition(f, firstNewFrame, firstNewFrameAncestors, notCommonAncestor ? containingBlock : nullptr); if (compare > 0) { // f is after the new frame. max = imid; insertionPoint = imid > 0 ? children[imid - 1] : nullptr; } else if (compare < 0) { // f is before the new frame. imin = imid + 1; insertionPoint = f; } else { // This is for the old behavior. Should be removed once it is // guaranteed that CompareTreePosition can't return 0! // See bug 928645. NS_WARNING("Something odd happening???"); insertionPoint = nullptr; for (uint32_t i = 0; i < children.Length(); ++i) { nsIFrame* f = children[i]; if (nsLayoutUtils::CompareTreePosition(f, firstNewFrame, firstNewFrameAncestors, notCommonAncestor ? containingBlock : nullptr) > 0) { break; } insertionPoint = f; } break; } } mFrameManager->InsertFrames(containingBlock, aChildListID, insertionPoint, aFrameItems); } } NS_POSTCONDITION(aFrameItems.IsEmpty(), "How did that happen?"); } nsFrameConstructorSaveState::nsFrameConstructorSaveState() : mItems(nullptr), mSavedItems(nullptr), mChildListID(kPrincipalList), mState(nullptr), mSavedFixedItems(nullptr), mSavedFixedPosIsAbsPos(false) { } nsFrameConstructorSaveState::~nsFrameConstructorSaveState() { // Restore the state if (mItems) { NS_ASSERTION(mState, "Can't have mItems set without having a state!"); mState->ProcessFrameInsertions(*mItems, mChildListID); *mItems = mSavedItems; #ifdef DEBUG // We've transferred the child list, so drop the pointer we held to it. // Note that this only matters for the assert in ~nsAbsoluteItems. mSavedItems.Clear(); #endif if (mItems == &mState->mAbsoluteItems) { mState->mFixedPosIsAbsPos = mSavedFixedPosIsAbsPos; if (mSavedFixedPosIsAbsPos) { // mAbsoluteItems was moved to mFixedItems, so move mFixedItems back // and repair the old mFixedItems now. mState->mAbsoluteItems = mState->mFixedItems; mState->mFixedItems = mSavedFixedItems; #ifdef DEBUG mSavedFixedItems.Clear(); #endif } } NS_ASSERTION(!mItems->LastChild() || !mItems->LastChild()->GetNextSibling(), "Something corrupted our list"); } } /** * Moves aFrameList from aOldParent to aNewParent. This updates the parent * pointer of the frames in the list, and reparents their views as needed. * nsFrame::SetParent sets the NS_FRAME_HAS_VIEW bit on aNewParent and its * ancestors as needed. Then it sets the list as the initial child list * on aNewParent, unless aNewParent either already has kids or has been * reflowed; in that case it appends the new frames. Note that this * method differs from ReparentFrames in that it doesn't change the kids' * style contexts. */ // XXXbz Since this is only used for {ib} splits, could we just copy the view // bits from aOldParent to aNewParent and then use the // nsFrameList::ApplySetParent? That would still leave us doing two passes // over the list, of course; if we really wanted to we could factor out the // relevant part of ReparentFrameViewList, I suppose... Or just get rid of // views, which would make most of this function go away. static void MoveChildrenTo(nsIFrame* aOldParent, nsContainerFrame* aNewParent, nsFrameList& aFrameList) { bool sameGrandParent = aOldParent->GetParent() == aNewParent->GetParent(); if (aNewParent->HasView() || aOldParent->HasView() || !sameGrandParent) { // Move the frames into the new view nsContainerFrame::ReparentFrameViewList(aFrameList, aOldParent, aNewParent); } for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) { e.get()->SetParent(aNewParent); } if (aNewParent->PrincipalChildList().IsEmpty() && (aNewParent->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { aNewParent->SetInitialChildList(kPrincipalList, aFrameList); } else { aNewParent->AppendFrames(kPrincipalList, aFrameList); } } //---------------------------------------------------------------------- nsCSSFrameConstructor::nsCSSFrameConstructor(nsIDocument* aDocument, nsIPresShell* aPresShell) : nsFrameManager(aPresShell) , mDocument(aDocument) , mRootElementFrame(nullptr) , mRootElementStyleFrame(nullptr) , mDocElementContainingBlock(nullptr) , mGfxScrollFrame(nullptr) , mPageSequenceFrame(nullptr) , mCurrentDepth(0) , mUpdateCount(0) , mQuotesDirty(false) , mCountersDirty(false) , mIsDestroyingFrameTree(false) , mHasRootAbsPosContainingBlock(false) , mAlwaysCreateFramesForIgnorableWhitespace(false) { #ifdef DEBUG static bool gFirstTime = true; if (gFirstTime) { gFirstTime = false; char* flags = PR_GetEnv("GECKO_FRAMECTOR_DEBUG_FLAGS"); if (flags) { bool error = false; for (;;) { char* comma = PL_strchr(flags, ','); if (comma) *comma = '\0'; bool found = false; FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { if (PL_strcasecmp(flag->name, flags) == 0) { *(flag->on) = true; printf("nsCSSFrameConstructor: setting %s debug flag on\n", flag->name); found = true; break; } ++flag; } if (! found) error = true; if (! comma) break; *comma = ','; flags = comma + 1; } if (error) { printf("Here are the available GECKO_FRAMECTOR_DEBUG_FLAGS:\n"); FrameCtorDebugFlags* flag = gFlags; FrameCtorDebugFlags* limit = gFlags + NUM_DEBUG_FLAGS; while (flag < limit) { printf(" %s\n", flag->name); ++flag; } printf("Note: GECKO_FRAMECTOR_DEBUG_FLAGS is a comma separated list of flag\n"); printf("names (no whitespace)\n"); } } } #endif } void nsCSSFrameConstructor::NotifyDestroyingFrame(nsIFrame* aFrame) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { if (mQuoteList.DestroyNodesFor(aFrame)) QuotesDirty(); } if (mCounterManager.DestroyNodesFor(aFrame)) { // Technically we don't need to update anything if we destroyed only // USE nodes. However, this is unlikely to happen in the real world // since USE nodes generally go along with INCREMENT nodes. CountersDirty(); } RestyleManager()->NotifyDestroyingFrame(aFrame); nsFrameManager::NotifyDestroyingFrame(aFrame); } struct nsGenConInitializer { nsAutoPtr mNode; nsGenConList* mList; void (nsCSSFrameConstructor::*mDirtyAll)(); nsGenConInitializer(nsGenConNode* aNode, nsGenConList* aList, void (nsCSSFrameConstructor::*aDirtyAll)()) : mNode(aNode), mList(aList), mDirtyAll(aDirtyAll) {} }; already_AddRefed nsCSSFrameConstructor::CreateGenConTextNode(nsFrameConstructorState& aState, const nsString& aString, RefPtr* aText, nsGenConInitializer* aInitializer) { RefPtr content = new nsTextNode(mDocument->NodeInfoManager()); content->SetText(aString, false); if (aText) { *aText = content; } if (aInitializer) { content->SetProperty(nsGkAtoms::genConInitializerProperty, aInitializer, nsINode::DeleteProperty); aState.mGeneratedTextNodesWithInitializer.AppendObject(content); } return content.forget(); } already_AddRefed nsCSSFrameConstructor::CreateGeneratedContent(nsFrameConstructorState& aState, nsIContent* aParentContent, nsStyleContext* aStyleContext, uint32_t aContentIndex) { // Get the content value const nsStyleContentData &data = aStyleContext->StyleContent()->ContentAt(aContentIndex); nsStyleContentType type = data.mType; if (eStyleContentType_Image == type) { if (!data.mContent.mImage) { // CSS had something specified that couldn't be converted to an // image object return nullptr; } // Create an image content object and pass it the image request. // XXX Check if it's an image type we can handle... RefPtr nodeInfo; nodeInfo = mDocument->NodeInfoManager()-> GetNodeInfo(nsGkAtoms::mozgeneratedcontentimage, nullptr, kNameSpaceID_XHTML, nsIDOMNode::ELEMENT_NODE); nsCOMPtr content; NS_NewGenConImageContent(getter_AddRefs(content), nodeInfo.forget(), data.mContent.mImage); return content.forget(); } switch (type) { case eStyleContentType_String: return CreateGenConTextNode(aState, nsDependentString(data.mContent.mString), nullptr, nullptr); case eStyleContentType_Attr: { nsCOMPtr attrName; int32_t attrNameSpace = kNameSpaceID_None; nsAutoString contentString(data.mContent.mString); int32_t barIndex = contentString.FindChar('|'); // CSS namespace delimiter if (-1 != barIndex) { nsAutoString nameSpaceVal; contentString.Left(nameSpaceVal, barIndex); nsresult error; attrNameSpace = nameSpaceVal.ToInteger(&error); contentString.Cut(0, barIndex + 1); if (contentString.Length()) { if (mDocument->IsHTMLDocument() && aParentContent->IsHTMLElement()) { ToLowerCase(contentString); } attrName = do_GetAtom(contentString); } } else { if (mDocument->IsHTMLDocument() && aParentContent->IsHTMLElement()) { ToLowerCase(contentString); } attrName = do_GetAtom(contentString); } if (!attrName) { return nullptr; } nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), attrNameSpace, attrName, getter_AddRefs(content)); return content.forget(); } case eStyleContentType_Counter: case eStyleContentType_Counters: { nsCSSValue::Array* counters = data.mContent.mCounters; nsCounterList* counterList = mCounterManager.CounterListFor( nsDependentString(counters->Item(0).GetStringBufferValue())); nsCounterUseNode* node = new nsCounterUseNode(mPresShell->GetPresContext(), counters, aContentIndex, type == eStyleContentType_Counters); nsGenConInitializer* initializer = new nsGenConInitializer(node, counterList, &nsCSSFrameConstructor::CountersDirty); return CreateGenConTextNode(aState, EmptyString(), &node->mText, initializer); } case eStyleContentType_Image: NS_NOTREACHED("handled by if above"); return nullptr; case eStyleContentType_OpenQuote: case eStyleContentType_CloseQuote: case eStyleContentType_NoOpenQuote: case eStyleContentType_NoCloseQuote: { nsQuoteNode* node = new nsQuoteNode(type, aContentIndex); nsGenConInitializer* initializer = new nsGenConInitializer(node, &mQuoteList, &nsCSSFrameConstructor::QuotesDirty); return CreateGenConTextNode(aState, EmptyString(), &node->mText, initializer); } case eStyleContentType_AltContent: { // Use the "alt" attribute; if that fails and the node is an HTML // , try the value attribute and then fall back to some default // localized text we have. // XXX what if the 'alt' attribute is added later, how will we // detect that and do the right thing here? if (aParentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::alt)) { nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), kNameSpaceID_None, nsGkAtoms::alt, getter_AddRefs(content)); return content.forget(); } if (aParentContent->IsHTMLElement() && aParentContent->NodeInfo()->Equals(nsGkAtoms::input)) { if (aParentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { nsCOMPtr content; NS_NewAttributeContent(mDocument->NodeInfoManager(), kNameSpaceID_None, nsGkAtoms::value, getter_AddRefs(content)); return content.forget(); } nsXPIDLString temp; nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", temp); return CreateGenConTextNode(aState, temp, nullptr, nullptr); } break; } case eStyleContentType_Uninitialized: NS_NOTREACHED("uninitialized content type"); return nullptr; } // switch return nullptr; } /* * aParentFrame - the frame that should be the parent of the generated * content. This is the frame for the corresponding content node, * which must not be a leaf frame. * * Any items created are added to aItems. * * We create an XML element (tag _moz_generated_content_before or * _moz_generated_content_after) representing the pseudoelement. We * create a DOM node for each 'content' item and make those nodes the * children of the XML element. Then we create a frame subtree for * the XML element as if it were a regular child of * aParentFrame/aParentContent, giving the XML element the ::before or * ::after style. */ void nsCSSFrameConstructor::CreateGeneratedContentItem(nsFrameConstructorState& aState, nsContainerFrame* aParentFrame, nsIContent* aParentContent, nsStyleContext* aStyleContext, nsCSSPseudoElements::Type aPseudoElement, FrameConstructionItemList& aItems) { MOZ_ASSERT(aPseudoElement == nsCSSPseudoElements::ePseudo_before || aPseudoElement == nsCSSPseudoElements::ePseudo_after, "unexpected aPseudoElement"); // XXXbz is this ever true? if (!aParentContent->IsElement()) { NS_ERROR("Bogus generated content parent"); return; } nsStyleSet *styleSet = mPresShell->StyleSet(); // Probe for the existence of the pseudo-element RefPtr pseudoStyleContext; pseudoStyleContext = styleSet->ProbePseudoElementStyle(aParentContent->AsElement(), aPseudoElement, aStyleContext, aState.mTreeMatchContext); if (!pseudoStyleContext) return; bool isBefore = aPseudoElement == nsCSSPseudoElements::ePseudo_before; // |ProbePseudoStyleFor| checked the 'display' property and the // |ContentCount()| of the 'content' property for us. RefPtr nodeInfo; nsIAtom* elemName = isBefore ? nsGkAtoms::mozgeneratedcontentbefore : nsGkAtoms::mozgeneratedcontentafter; nodeInfo = mDocument->NodeInfoManager()->GetNodeInfo(elemName, nullptr, kNameSpaceID_None, nsIDOMNode::ELEMENT_NODE); nsCOMPtr container; nsresult rv = NS_NewXMLElement(getter_AddRefs(container), nodeInfo.forget()); if (NS_FAILED(rv)) return; container->SetIsNativeAnonymousRoot(); // If the parent is in a shadow tree, make sure we don't // bind with a document because shadow roots and its descendants // are not in document. nsIDocument* bindDocument = aParentContent->HasFlag(NODE_IS_IN_SHADOW_TREE) ? nullptr : mDocument; rv = container->BindToTree(bindDocument, aParentContent, aParentContent, true); if (NS_FAILED(rv)) { container->UnbindFromTree(); return; } RestyleManager::ReframingStyleContexts* rsc = RestyleManager()->GetReframingStyleContexts(); if (rsc) { nsStyleContext* oldStyleContext = rsc->Get(container, aPseudoElement); if (oldStyleContext) { RestyleManager::TryStartingTransition(aState.mPresContext, container, oldStyleContext, &pseudoStyleContext); } else { aState.mPresContext->TransitionManager()-> PruneCompletedTransitions(container, aPseudoElement, pseudoStyleContext); } } uint32_t contentCount = pseudoStyleContext->StyleContent()->ContentCount(); for (uint32_t contentIndex = 0; contentIndex < contentCount; contentIndex++) { nsCOMPtr content = CreateGeneratedContent(aState, aParentContent, pseudoStyleContext, contentIndex); if (content) { container->AppendChildTo(content, false); } } AddFrameConstructionItemsInternal(aState, container, aParentFrame, elemName, kNameSpaceID_None, true, pseudoStyleContext, ITEM_IS_GENERATED_CONTENT, nullptr, aItems); } /**************************************************** ** BEGIN TABLE SECTION ****************************************************/ // The term pseudo frame is being used instead of anonymous frame, since anonymous // frame has been used elsewhere to refer to frames that have generated content // Return whether the given frame is a table pseudo-frame. Note that // cell-content and table-outer frames have pseudo-types, but are always // created, even for non-anonymous cells and tables respectively. So for those // we have to examine the cell or table frame to see whether it's a pseudo // frame. In particular, a lone table caption will have an outer table as its // parent, but will also trigger construction of an empty inner table, which // will be the one we can examine to see whether the outer was a pseudo-frame. static bool IsTablePseudo(nsIFrame* aFrame) { nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo(); return pseudoType && (pseudoType == nsCSSAnonBoxes::table || pseudoType == nsCSSAnonBoxes::inlineTable || pseudoType == nsCSSAnonBoxes::tableColGroup || pseudoType == nsCSSAnonBoxes::tableRowGroup || pseudoType == nsCSSAnonBoxes::tableRow || pseudoType == nsCSSAnonBoxes::tableCell || (pseudoType == nsCSSAnonBoxes::cellContent && aFrame->GetParent()->StyleContext()->GetPseudo() == nsCSSAnonBoxes::tableCell) || (pseudoType == nsCSSAnonBoxes::tableOuter && (aFrame->GetFirstPrincipalChild()->StyleContext()->GetPseudo() == nsCSSAnonBoxes::table || aFrame->GetFirstPrincipalChild()->StyleContext()->GetPseudo() == nsCSSAnonBoxes::inlineTable))); } static bool IsRubyPseudo(nsIFrame* aFrame) { nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo(); return pseudoType && (pseudoType == nsCSSAnonBoxes::ruby || pseudoType == nsCSSAnonBoxes::rubyBase || pseudoType == nsCSSAnonBoxes::rubyText || pseudoType == nsCSSAnonBoxes::rubyBaseContainer || pseudoType == nsCSSAnonBoxes::rubyTextContainer); } static bool IsTableOrRubyPseudo(nsIFrame* aFrame) { return IsTablePseudo(aFrame) || IsRubyPseudo(aFrame); } /* static */ nsCSSFrameConstructor::ParentType nsCSSFrameConstructor::GetParentType(nsIAtom* aFrameType) { if (aFrameType == nsGkAtoms::tableFrame) { return eTypeTable; } if (aFrameType == nsGkAtoms::tableRowGroupFrame) { return eTypeRowGroup; } if (aFrameType == nsGkAtoms::tableRowFrame) { return eTypeRow; } if (aFrameType == nsGkAtoms::tableColGroupFrame) { return eTypeColGroup; } if (aFrameType == nsGkAtoms::rubyBaseContainerFrame) { return eTypeRubyBaseContainer; } if (aFrameType == nsGkAtoms::rubyTextContainerFrame) { return eTypeRubyTextContainer; } if (aFrameType == nsGkAtoms::rubyFrame) { return eTypeRuby; } return eTypeBlock; } static nsContainerFrame* AdjustCaptionParentFrame(nsContainerFrame* aParentFrame) { if (nsGkAtoms::tableFrame == aParentFrame->GetType()) { return aParentFrame->GetParent(); } return aParentFrame; } /** * If the parent frame is a |tableFrame| and the child is a * |captionFrame|, then we want to insert the frames beneath the * |tableFrame|'s parent frame. Returns |true| if the parent frame * needed to be fixed up. */ static bool GetCaptionAdjustedParent(nsContainerFrame* aParentFrame, const nsIFrame* aChildFrame, nsContainerFrame** aAdjParentFrame) { *aAdjParentFrame = aParentFrame; bool haveCaption = false; if (aChildFrame->IsTableCaption()) { haveCaption = true; *aAdjParentFrame = ::AdjustCaptionParentFrame(aParentFrame); } return haveCaption; } void nsCSSFrameConstructor::AdjustParentFrame(nsContainerFrame** aParentFrame, const FrameConstructionData* aFCData, nsStyleContext* aStyleContext) { NS_PRECONDITION(aStyleContext, "Must have child's style context"); NS_PRECONDITION(aFCData, "Must have frame construction data"); bool tablePart = ((aFCData->mBits & FCDATA_IS_TABLE_PART) != 0); if (tablePart && aStyleContext->StyleDisplay()->mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION) { *aParentFrame = ::AdjustCaptionParentFrame(*aParentFrame); } } // Pull all the captions present in aItems out into aCaptions static void PullOutCaptionFrames(nsFrameItems& aItems, nsFrameItems& aCaptions) { nsIFrame* child = aItems.FirstChild(); while (child) { nsIFrame* nextSibling = child->GetNextSibling(); if (child->IsTableCaption()) { aItems.RemoveFrame(child); aCaptions.AddChild(child); } child = nextSibling; } } // Construct the outer, inner table frames and the children frames for the table. // XXX Page break frames for pseudo table frames are not constructed to avoid the risk // associated with revising the pseudo frame mechanism. The long term solution // of having frames handle page-break-before/after will solve the problem. nsIFrame* nsCSSFrameConstructor::ConstructTable(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_TABLE, "Unexpected call"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const uint32_t nameSpaceID = aItem.mNameSpaceID; // create the pseudo SC for the outer table as a child of the inner SC RefPtr outerStyleContext; outerStyleContext = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::tableOuter, styleContext); // Create the outer table frame which holds the caption and inner table frame nsContainerFrame* newFrame; if (kNameSpaceID_MathML == nameSpaceID) newFrame = NS_NewMathMLmtableOuterFrame(mPresShell, outerStyleContext); else newFrame = NS_NewTableOuterFrame(mPresShell, outerStyleContext); nsContainerFrame* geometricParent = aState.GetGeometricParent(outerStyleContext->StyleDisplay(), aParentFrame); // Init the table outer frame InitAndRestoreFrame(aState, content, geometricParent, newFrame); // Create the inner table frame nsContainerFrame* innerFrame; if (kNameSpaceID_MathML == nameSpaceID) innerFrame = NS_NewMathMLmtableFrame(mPresShell, styleContext); else innerFrame = NS_NewTableFrame(mPresShell, styleContext); InitAndRestoreFrame(aState, content, newFrame, innerFrame); // Put the newly created frames into the right child list SetInitialSingleChild(newFrame, innerFrame); aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); if (!mRootElementFrame) { // The frame we're constructing will be the root element frame. // Set mRootElementFrame before processing children. mRootElementFrame = newFrame; } nsFrameItems childItems; // Process children nsFrameConstructorSaveState absoluteSaveState; const nsStyleDisplay* display = outerStyleContext->StyleDisplay(); // Mark the table frame as an absolute container if needed newFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); if (display->IsAbsPosContainingBlock(newFrame)) { aState.PushAbsoluteContainingBlock(newFrame, newFrame, absoluteSaveState); } NS_ASSERTION(aItem.mAnonChildren.IsEmpty(), "nsIAnonymousContentCreator::CreateAnonymousContent " "implementations for table frames are not currently expected " "to output a list where the items have their own children"); if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { ConstructFramesFromItemList(aState, aItem.mChildItems, innerFrame, childItems); } else { ProcessChildren(aState, content, styleContext, innerFrame, true, childItems, false, aItem.mPendingBinding); } nsFrameItems captionItems; PullOutCaptionFrames(childItems, captionItems); // Set the inner table frame's initial primary list innerFrame->SetInitialChildList(kPrincipalList, childItems); // Set the outer table frame's secondary childlist lists if (captionItems.NotEmpty()) { newFrame->SetInitialChildList(nsIFrame::kCaptionList, captionItems); } return newFrame; } static void MakeTablePartAbsoluteContainingBlockIfNeeded(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsFrameConstructorSaveState& aAbsSaveState, nsContainerFrame* aFrame) { // If we're positioned, then we need to become an absolute containing block // for any absolutely positioned children and register for post-reflow fixup. // // Note that usually if a frame type can be an absolute containing block, we // always set NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN, whether it actually is or not. // However, in this case flag serves the additional purpose of indicating that // the frame was registered with its table frame. This allows us to avoid the // overhead of unregistering the frame in most cases. if (aDisplay->IsAbsPosContainingBlock(aFrame)) { aFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); aState.PushAbsoluteContainingBlock(aFrame, aFrame, aAbsSaveState); nsTableFrame::RegisterPositionedTablePart(aFrame); } } nsIFrame* nsCSSFrameConstructor::ConstructTableRowOrRowGroup(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW || aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW_GROUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_HEADER_GROUP, "Unexpected call"); MOZ_ASSERT(aItem.mStyleContext->StyleDisplay() == aDisplay, "Display style doesn't match style context"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const uint32_t nameSpaceID = aItem.mNameSpaceID; nsContainerFrame* newFrame; if (aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_ROW) { if (kNameSpaceID_MathML == nameSpaceID) newFrame = NS_NewMathMLmtrFrame(mPresShell, styleContext); else newFrame = NS_NewTableRowFrame(mPresShell, styleContext); } else { newFrame = NS_NewTableRowGroupFrame(mPresShell, styleContext); } InitAndRestoreFrame(aState, content, aParentFrame, newFrame); nsFrameConstructorSaveState absoluteSaveState; MakeTablePartAbsoluteContainingBlockIfNeeded(aState, aDisplay, absoluteSaveState, newFrame); nsFrameItems childItems; NS_ASSERTION(aItem.mAnonChildren.IsEmpty(), "nsIAnonymousContentCreator::CreateAnonymousContent " "implementations for table frames are not currently expected " "to output a list where the items have their own children"); if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { ConstructFramesFromItemList(aState, aItem.mChildItems, newFrame, childItems); } else { ProcessChildren(aState, content, styleContext, newFrame, true, childItems, false, aItem.mPendingBinding); } newFrame->SetInitialChildList(kPrincipalList, childItems); aFrameItems.AddChild(newFrame); return newFrame; } nsIFrame* nsCSSFrameConstructor::ConstructTableCol(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsTableColFrame* colFrame = NS_NewTableColFrame(mPresShell, styleContext); InitAndRestoreFrame(aState, content, aParentFrame, colFrame); NS_ASSERTION(colFrame->StyleContext() == styleContext, "Unexpected style context"); aFrameItems.AddChild(colFrame); // construct additional col frames if the col frame has a span > 1 int32_t span = colFrame->GetSpan(); for (int32_t spanX = 1; spanX < span; spanX++) { nsTableColFrame* newCol = NS_NewTableColFrame(mPresShell, styleContext); InitAndRestoreFrame(aState, content, aParentFrame, newCol, false); aFrameItems.LastChild()->SetNextContinuation(newCol); newCol->SetPrevContinuation(aFrameItems.LastChild()); aFrameItems.AddChild(newCol); newCol->SetColType(eColAnonymousCol); } return colFrame; } nsIFrame* nsCSSFrameConstructor::ConstructTableCell(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { NS_PRECONDITION(aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CELL, "Unexpected call"); nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; const uint32_t nameSpaceID = aItem.mNameSpaceID; nsTableFrame* tableFrame = static_cast(aParentFrame)->GetTableFrame(); nsContainerFrame* newFrame; // is border separate in mathml.css and the MathML code doesn't implement // border collapse. For those users who style with border collapse, // give them the default non-MathML table frames that understand border collapse. // This won't break us because MathML table frames are all subclasses of the default // table code, and so we can freely mix with or , or . // What will happen is just that non-MathML frames won't understand MathML attributes // and will therefore miss the special handling that the MathML code does. if (kNameSpaceID_MathML == nameSpaceID && !tableFrame->IsBorderCollapse()) { newFrame = NS_NewMathMLmtdFrame(mPresShell, styleContext, tableFrame); } else { // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. newFrame = NS_NewTableCellFrame(mPresShell, styleContext, tableFrame); } // Initialize the table cell frame InitAndRestoreFrame(aState, content, aParentFrame, newFrame); // Resolve pseudo style and initialize the body cell frame RefPtr innerPseudoStyle; innerPseudoStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::cellContent, styleContext); // Create a block frame that will format the cell's content bool isBlock; nsContainerFrame* cellInnerFrame; if (kNameSpaceID_MathML == nameSpaceID) { cellInnerFrame = NS_NewMathMLmtdInnerFrame(mPresShell, innerPseudoStyle); isBlock = false; } else { cellInnerFrame = NS_NewBlockFormattingContext(mPresShell, innerPseudoStyle); isBlock = true; } InitAndRestoreFrame(aState, content, newFrame, cellInnerFrame); nsFrameConstructorSaveState absoluteSaveState; MakeTablePartAbsoluteContainingBlockIfNeeded(aState, aDisplay, absoluteSaveState, newFrame); nsFrameItems childItems; NS_ASSERTION(aItem.mAnonChildren.IsEmpty(), "nsIAnonymousContentCreator::CreateAnonymousContent " "implementations for table frames are not currently expected " "to output a list where the items have their own children"); if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { // Need to push ourselves as a float containing block. // XXXbz it might be nice to work on getting the parent // FrameConstructionItem down into ProcessChildren and just making use of // the push there, but that's a bit of work. nsFrameConstructorSaveState floatSaveState; if (!isBlock) { /* MathML case */ aState.PushFloatContainingBlock(nullptr, floatSaveState); } else { aState.PushFloatContainingBlock(cellInnerFrame, floatSaveState); } ConstructFramesFromItemList(aState, aItem.mChildItems, cellInnerFrame, childItems); } else { // Process the child content ProcessChildren(aState, content, styleContext, cellInnerFrame, true, childItems, isBlock, aItem.mPendingBinding); } cellInnerFrame->SetInitialChildList(kPrincipalList, childItems); SetInitialSingleChild(newFrame, cellInnerFrame); aFrameItems.AddChild(newFrame); return newFrame; } static inline bool NeedFrameFor(const nsFrameConstructorState& aState, nsIFrame* aParentFrame, nsIContent* aChildContent) { // XXX the GetContent() != aChildContent check is needed due to bug 135040. // Remove it once that's fixed. NS_PRECONDITION(!aChildContent->GetPrimaryFrame() || aState.mCreatingExtraFrames || aChildContent->GetPrimaryFrame()->GetContent() != aChildContent, "Why did we get called?"); // don't create a whitespace frame if aParentFrame doesn't want it. // always create frames for children in generated content. counter(), // quotes, and attr() content can easily change dynamically and we don't // want to be reconstructing frames. It's not even clear that these // should be considered ignorable just because they evaluate to // whitespace. // We could handle all this in CreateNeededPseudoContainers or some other // place after we build our frame construction items, but that would involve // creating frame construction items for whitespace kids of // eExcludesIgnorableWhitespace frames, where we know we'll be dropping them // all anyway, and involve an extra walk down the frame construction item // list. if ((aParentFrame && (!aParentFrame->IsFrameOfType(nsIFrame::eExcludesIgnorableWhitespace) || aParentFrame->IsGeneratedContentFrame())) || !aChildContent->IsNodeOfType(nsINode::eTEXT)) { return true; } aChildContent->SetFlags(NS_CREATE_FRAME_IF_NON_WHITESPACE | NS_REFRAME_IF_WHITESPACE); return !aChildContent->TextIsOnlyWhitespace(); } /*********************************************** * END TABLE SECTION ***********************************************/ nsIFrame* nsCSSFrameConstructor::ConstructDocElementFrame(Element* aDocElement, nsILayoutHistoryState* aFrameState) { MOZ_ASSERT(GetRootFrame(), "No viewport? Someone forgot to call ConstructRootFrame!"); MOZ_ASSERT(!mDocElementContainingBlock, "Shouldn't have a doc element containing block here"); // Resolve a new style context for the viewport since it may be affected // by a new root element style (e.g. a propagated 'direction'). // @see nsStyleContext::ApplyStyleFixups { RefPtr sc = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::viewport, nullptr); GetRootFrame()->SetStyleContextWithoutNotification(sc); } // Make sure to call UpdateViewportScrollbarStylesOverride before // SetUpDocElementContainingBlock, since it sets up our scrollbar state // properly. DebugOnly propagatedScrollFrom; if (nsPresContext* presContext = mPresShell->GetPresContext()) { propagatedScrollFrom = presContext->UpdateViewportScrollbarStylesOverride(); } SetUpDocElementContainingBlock(aDocElement); NS_ASSERTION(mDocElementContainingBlock, "Should have parent by now"); nsFrameConstructorState state(mPresShell, GetAbsoluteContainingBlock(mDocElementContainingBlock, FIXED_POS), nullptr, nullptr, do_AddRef(Move(aFrameState))); // Initialize the ancestor filter with null for now; we'll push // aDocElement once we finish resolving style for it. state.mTreeMatchContext.InitAncestors(nullptr); // XXXbz why, exactly? if (!mTempFrameTreeState) state.mPresShell->CaptureHistoryState(getter_AddRefs(mTempFrameTreeState)); // Make sure that we'll handle restyles for this document element in // the future. We need this, because the document element might // have stale restyle bits from a previous frame constructor for // this document. Unlike in AddFrameConstructionItems, it's safe to // unset all element restyle flags, since we don't have any // siblings. aDocElement->UnsetFlags(ELEMENT_ALL_RESTYLE_FLAGS); // --------- CREATE AREA OR BOX FRAME ------- // FIXME: Should this use ResolveStyleContext? (The calls in this // function are the only case in nsCSSFrameConstructor where we don't // do so for the construction of a style context for an element.) RefPtr styleContext; styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nullptr); const nsStyleDisplay* display = styleContext->StyleDisplay(); // Ensure that our XBL bindings are installed. if (display->mBinding) { // Get the XBL loader. nsresult rv; bool resolveStyle; nsXBLService* xblService = nsXBLService::GetInstance(); if (!xblService) { return nullptr; } RefPtr binding; rv = xblService->LoadBindings(aDocElement, display->mBinding->GetURI(), display->mBinding->mOriginPrincipal, getter_AddRefs(binding), &resolveStyle); if (NS_FAILED(rv) && rv != NS_ERROR_XBL_BLOCKED) return nullptr; // Binding will load asynchronously. if (binding) { // For backwards compat, keep firing the root's constructor // after all of its kids' constructors. So tell the binding // manager about it right now. mDocument->BindingManager()->AddToAttachedQueue(binding); } if (resolveStyle) { // FIXME: Should this use ResolveStyleContext? (The calls in this // function are the only case in nsCSSFrameConstructor where we // don't do so for the construction of a style context for an // element.) styleContext = mPresShell->StyleSet()->ResolveStyleFor(aDocElement, nullptr); display = styleContext->StyleDisplay(); } } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- NS_ASSERTION(!display->IsScrollableOverflow() || state.mPresContext->IsPaginated() || propagatedScrollFrom == aDocElement, "Scrollbars should have been propagated to the viewport"); if (MOZ_UNLIKELY(display->mDisplay == NS_STYLE_DISPLAY_NONE)) { SetUndisplayedContent(aDocElement, styleContext); return nullptr; } TreeMatchContext::AutoAncestorPusher ancestorPusher(state.mTreeMatchContext); ancestorPusher.PushAncestorAndStyleScope(aDocElement); // Make sure to start any background image loads for the root element now. styleContext->StartBackgroundImageLoads(); nsFrameConstructorSaveState absoluteSaveState; if (mHasRootAbsPosContainingBlock) { // Push the absolute containing block now so we can absolutely position // the root element mDocElementContainingBlock->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); state.PushAbsoluteContainingBlock(mDocElementContainingBlock, mDocElementContainingBlock, absoluteSaveState); } // The rules from CSS 2.1, section 9.2.4, have already been applied // by the style system, so we can assume that display->mDisplay is // either NONE, BLOCK, or TABLE. // contentFrame is the primary frame for the root element. newFrame // is the frame that will be the child of the initial containing block. // These are usually the same frame but they can be different, in // particular if the root frame is positioned, in which case // contentFrame is the out-of-flow frame and newFrame is the // placeholder. nsContainerFrame* contentFrame; nsIFrame* newFrame; bool processChildren = false; // Check whether we need to build a XUL box or SVG root frame #ifdef MOZ_XUL if (aDocElement->IsXULElement()) { contentFrame = NS_NewDocElementBoxFrame(mPresShell, styleContext); InitAndRestoreFrame(state, aDocElement, mDocElementContainingBlock, contentFrame); newFrame = contentFrame; processChildren = true; } else #endif if (aDocElement->IsSVGElement()) { if (!aDocElement->IsSVGElement(nsGkAtoms::svg)) { return nullptr; } // We're going to call the right function ourselves, so no need to give a // function to this FrameConstructionData. // XXXbz on the other hand, if we converted this whole function to // FrameConstructionData/Item, then we'd need the right function // here... but would probably be able to get away with less code in this // function in general. // Use a null PendingBinding, since our binding is not in fact pending. static const FrameConstructionData rootSVGData = FCDATA_DECL(0, nullptr); already_AddRefed extraRef = RefPtr(styleContext).forget(); FrameConstructionItem item(&rootSVGData, aDocElement, aDocElement->NodeInfo()->NameAtom(), kNameSpaceID_SVG, nullptr, extraRef, true, nullptr); nsFrameItems frameItems; contentFrame = static_cast( ConstructOuterSVG(state, item, mDocElementContainingBlock, styleContext->StyleDisplay(), frameItems)); newFrame = frameItems.FirstChild(); NS_ASSERTION(frameItems.OnlyChild(), "multiple root element frames"); } else if (display->mDisplay == NS_STYLE_DISPLAY_FLEX) { contentFrame = NS_NewFlexContainerFrame(mPresShell, styleContext); InitAndRestoreFrame(state, aDocElement, mDocElementContainingBlock, contentFrame); newFrame = contentFrame; processChildren = true; } else if (display->mDisplay == NS_STYLE_DISPLAY_GRID) { contentFrame = NS_NewGridContainerFrame(mPresShell, styleContext); InitAndRestoreFrame(state, aDocElement, mDocElementContainingBlock, contentFrame); newFrame = contentFrame; processChildren = true; } else if (display->mDisplay == NS_STYLE_DISPLAY_TABLE) { // We're going to call the right function ourselves, so no need to give a // function to this FrameConstructionData. // XXXbz on the other hand, if we converted this whole function to // FrameConstructionData/Item, then we'd need the right function // here... but would probably be able to get away with less code in this // function in general. // Use a null PendingBinding, since our binding is not in fact pending. static const FrameConstructionData rootTableData = FCDATA_DECL(0, nullptr); already_AddRefed extraRef = RefPtr(styleContext).forget(); FrameConstructionItem item(&rootTableData, aDocElement, aDocElement->NodeInfo()->NameAtom(), kNameSpaceID_None, nullptr, extraRef, true, nullptr); nsFrameItems frameItems; // if the document is a table then just populate it. contentFrame = static_cast( ConstructTable(state, item, mDocElementContainingBlock, styleContext->StyleDisplay(), frameItems)); newFrame = frameItems.FirstChild(); NS_ASSERTION(frameItems.OnlyChild(), "multiple root element frames"); } else { MOZ_ASSERT(display->mDisplay == NS_STYLE_DISPLAY_BLOCK, "Unhandled display type for root element"); contentFrame = NS_NewBlockFormattingContext(mPresShell, styleContext); nsFrameItems frameItems; // Use a null PendingBinding, since our binding is not in fact pending. ConstructBlock(state, display, aDocElement, state.GetGeometricParent(display, mDocElementContainingBlock), mDocElementContainingBlock, styleContext, &contentFrame, frameItems, display->IsAbsPosContainingBlock(contentFrame) ? contentFrame : nullptr, nullptr); newFrame = frameItems.FirstChild(); NS_ASSERTION(frameItems.OnlyChild(), "multiple root element frames"); } MOZ_ASSERT(newFrame); MOZ_ASSERT(contentFrame); NS_ASSERTION(processChildren ? !mRootElementFrame : mRootElementFrame == contentFrame, "unexpected mRootElementFrame"); mRootElementFrame = contentFrame; // Figure out which frame has the main style for the document element, // assigning it to mRootElementStyleFrame. // Backgrounds should be propagated from that frame to the viewport. contentFrame->GetParentStyleContext(&mRootElementStyleFrame); bool isChild = mRootElementStyleFrame && mRootElementStyleFrame->GetParent() == contentFrame; if (!isChild) { mRootElementStyleFrame = mRootElementFrame; } if (processChildren) { // Still need to process the child content nsFrameItems childItems; NS_ASSERTION(!nsLayoutUtils::GetAsBlock(contentFrame) && !contentFrame->IsFrameOfType(nsIFrame::eSVG), "Only XUL frames should reach here"); // Use a null PendingBinding, since our binding is not in fact pending. ProcessChildren(state, aDocElement, styleContext, contentFrame, true, childItems, false, nullptr); // Set the initial child lists contentFrame->SetInitialChildList(kPrincipalList, childItems); } // set the primary frame aDocElement->SetPrimaryFrame(contentFrame); SetInitialSingleChild(mDocElementContainingBlock, newFrame); // Create frames for anonymous contents if there is a canvas frame. if (mDocElementContainingBlock->GetType() == nsGkAtoms::canvasFrame) { ConstructAnonymousContentForCanvas(state, mDocElementContainingBlock, aDocElement); } return newFrame; } nsIFrame* nsCSSFrameConstructor::ConstructRootFrame() { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); nsStyleSet *styleSet = mPresShell->StyleSet(); // Set up our style rule observer. // XXXbz wouldn't this make more sense as part of presshell init? { styleSet->SetBindingManager(mDocument->BindingManager()); } // --------- BUILD VIEWPORT ----------- RefPtr viewportPseudoStyle = styleSet->ResolveAnonymousBoxStyle(nsCSSAnonBoxes::viewport, nullptr); ViewportFrame* viewportFrame = NS_NewViewportFrame(mPresShell, viewportPseudoStyle); // XXXbz do we _have_ to pass a null content pointer to that frame? // Would it really kill us to pass in the root element or something? // What would that break? viewportFrame->Init(nullptr, nullptr, nullptr); // Bind the viewport frame to the root view nsView* rootView = mPresShell->GetViewManager()->GetRootView(); viewportFrame->SetView(rootView); nsContainerFrame::SyncFrameViewProperties(mPresShell->GetPresContext(), viewportFrame, viewportPseudoStyle, rootView); nsContainerFrame::SyncWindowProperties(mPresShell->GetPresContext(), viewportFrame, rootView, nullptr, nsContainerFrame::SET_ASYNC); // Make it an absolute container for fixed-pos elements viewportFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); viewportFrame->MarkAsAbsoluteContainingBlock(); return viewportFrame; } void nsCSSFrameConstructor::SetUpDocElementContainingBlock(nsIContent* aDocElement) { NS_PRECONDITION(aDocElement, "No element?"); NS_PRECONDITION(!aDocElement->GetParent(), "Not root content?"); NS_PRECONDITION(aDocElement->GetCurrentDoc(), "Not in a document?"); NS_PRECONDITION(aDocElement->GetCurrentDoc()->GetRootElement() == aDocElement, "Not the root of the document?"); /* how the root frame hierarchy should look Galley presentation, non-XUL, with scrolling: ViewportFrame [fixed-cb] nsHTMLScrollFrame nsCanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Galley presentation, XUL ViewportFrame [fixed-cb] nsRootBoxFrame root element frame (nsDocElementBoxFrame) Print presentation, non-XUL ViewportFrame nsSimplePageSequenceFrame nsPageFrame nsPageContentFrame [fixed-cb] nsCanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Print-preview presentation, non-XUL ViewportFrame nsHTMLScrollFrame nsSimplePageSequenceFrame nsPageFrame nsPageContentFrame [fixed-cb] nsCanvasFrame [abs-cb] root element frame (nsBlockFrame, nsSVGOuterSVGFrame, nsTableOuterFrame, nsPlaceholderFrame) Print/print preview of XUL is not supported. [fixed-cb]: the default containing block for fixed-pos content [abs-cb]: the default containing block for abs-pos content Meaning of nsCSSFrameConstructor fields: mRootElementFrame is "root element frame". This is the primary frame for the root element. mDocElementContainingBlock is the parent of mRootElementFrame (i.e. nsCanvasFrame or nsRootBoxFrame) mGfxScrollFrame is the nsHTMLScrollFrame mentioned above, or null if there isn't one mPageSequenceFrame is the nsSimplePageSequenceFrame, or null if there isn't one */ // --------- CREATE ROOT FRAME ------- // Create the root frame. The document element's frame is a child of the // root frame. // // The root frame serves two purposes: // - reserves space for any margins needed for the document element's frame // - renders the document element's background. This ensures the background covers // the entire canvas as specified by the CSS2 spec nsPresContext* presContext = mPresShell->GetPresContext(); bool isPaginated = presContext->IsRootPaginatedDocument(); nsContainerFrame* viewportFrame = static_cast(GetRootFrame()); nsStyleContext* viewportPseudoStyle = viewportFrame->StyleContext(); nsContainerFrame* rootFrame = nullptr; nsIAtom* rootPseudo; if (!isPaginated) { #ifdef MOZ_XUL if (aDocElement->IsXULElement()) { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewRootBoxFrame(mPresShell, viewportPseudoStyle); } else #endif { // pass a temporary stylecontext, the correct one will be set later rootFrame = NS_NewCanvasFrame(mPresShell, viewportPseudoStyle); mHasRootAbsPosContainingBlock = true; } rootPseudo = nsCSSAnonBoxes::canvas; mDocElementContainingBlock = rootFrame; } else { // Create a page sequence frame rootFrame = NS_NewSimplePageSequenceFrame(mPresShell, viewportPseudoStyle); mPageSequenceFrame = rootFrame; rootPseudo = nsCSSAnonBoxes::pageSequence; } // --------- IF SCROLLABLE WRAP IN SCROLLFRAME -------- // If the device supports scrolling (e.g., in galley mode on the screen and // for print-preview, but not when printing), then create a scroll frame that // will act as the scrolling mechanism for the viewport. // XXX Do we even need a viewport when printing to a printer? bool isHTML = aDocElement->IsHTMLElement(); bool isXUL = false; if (!isHTML) { isXUL = aDocElement->IsXULElement(); } // Never create scrollbars for XUL documents bool isScrollable = isPaginated ? presContext->HasPaginatedScrolling() : !isXUL; // We no longer need to do overflow propagation here. It's taken care of // when we construct frames for the element whose overflow might be // propagated NS_ASSERTION(!isScrollable || !isXUL, "XUL documents should never be scrollable - see above"); nsContainerFrame* newFrame = rootFrame; RefPtr rootPseudoStyle; // we must create a state because if the scrollbars are GFX it needs the // state to build the scrollbar frames. nsFrameConstructorState state(mPresShell, nullptr, nullptr, nullptr); // Start off with the viewport as parent; we'll adjust it as needed. nsContainerFrame* parentFrame = viewportFrame; nsStyleSet* styleSet = mPresShell->StyleSet(); // If paginated, make sure we don't put scrollbars in if (!isScrollable) { rootPseudoStyle = styleSet->ResolveAnonymousBoxStyle(rootPseudo, viewportPseudoStyle); } else { if (rootPseudo == nsCSSAnonBoxes::canvas) { rootPseudo = nsCSSAnonBoxes::scrolledCanvas; } else { NS_ASSERTION(rootPseudo == nsCSSAnonBoxes::pageSequence, "Unknown root pseudo"); rootPseudo = nsCSSAnonBoxes::scrolledPageSequence; } // Build the frame. We give it the content we are wrapping which is the // document element, the root frame, the parent view port frame, and we // should get back the new frame and the scrollable view if one was // created. // resolve a context for the scrollframe RefPtr styleContext; styleContext = styleSet->ResolveAnonymousBoxStyle(nsCSSAnonBoxes::viewportScroll, viewportPseudoStyle); // Note that the viewport scrollframe is always built with // overflow:auto style. This forces the scroll frame to create // anonymous content for both scrollbars. This is necessary even // if the HTML or BODY elements are overriding the viewport // scroll style to 'hidden' --- dynamic style changes might put // scrollbars back on the viewport and we don't want to have to // reframe the viewport to create the scrollbar content. newFrame = nullptr; rootPseudoStyle = BeginBuildingScrollFrame( state, aDocElement, styleContext, viewportFrame, rootPseudo, true, newFrame); parentFrame = newFrame; mGfxScrollFrame = newFrame; } rootFrame->SetStyleContextWithoutNotification(rootPseudoStyle); rootFrame->Init(aDocElement, parentFrame, nullptr); if (isScrollable) { FinishBuildingScrollFrame(parentFrame, rootFrame); } if (isPaginated) { // Create the first page // Set the initial child lists nsContainerFrame* canvasFrame; nsContainerFrame* pageFrame = ConstructPageFrame(mPresShell, rootFrame, nullptr, canvasFrame); SetInitialSingleChild(rootFrame, pageFrame); // The eventual parent of the document element frame. // XXX should this be set for every new page (in ConstructPageFrame)? mDocElementContainingBlock = canvasFrame; mHasRootAbsPosContainingBlock = true; } if (viewportFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) { SetInitialSingleChild(viewportFrame, newFrame); } else { nsFrameList newFrameList(newFrame, newFrame); viewportFrame->AppendFrames(kPrincipalList, newFrameList); } } void nsCSSFrameConstructor::ConstructAnonymousContentForCanvas(nsFrameConstructorState& aState, nsIFrame* aFrame, nsIContent* aDocElement) { NS_ASSERTION(aFrame->GetType() == nsGkAtoms::canvasFrame, "aFrame should be canvas frame!"); nsAutoTArray anonymousItems; GetAnonymousContent(aDocElement, aFrame, anonymousItems); if (anonymousItems.IsEmpty()) { return; } FrameConstructionItemList itemsToConstruct; nsContainerFrame* frameAsContainer = do_QueryFrame(aFrame); AddFCItemsForAnonymousContent(aState, frameAsContainer, anonymousItems, itemsToConstruct); nsFrameItems frameItems; ConstructFramesFromItemList(aState, itemsToConstruct, frameAsContainer, frameItems); frameAsContainer->AppendFrames(kPrincipalList, frameItems); } nsContainerFrame* nsCSSFrameConstructor::ConstructPageFrame(nsIPresShell* aPresShell, nsContainerFrame* aParentFrame, nsIFrame* aPrevPageFrame, nsContainerFrame*& aCanvasFrame) { nsStyleContext* parentStyleContext = aParentFrame->StyleContext(); nsStyleSet *styleSet = aPresShell->StyleSet(); RefPtr pagePseudoStyle; pagePseudoStyle = styleSet->ResolveAnonymousBoxStyle(nsCSSAnonBoxes::page, parentStyleContext); nsContainerFrame* pageFrame = NS_NewPageFrame(aPresShell, pagePseudoStyle); // Initialize the page frame and force it to have a view. This makes printing of // the pages easier and faster. pageFrame->Init(nullptr, aParentFrame, aPrevPageFrame); RefPtr pageContentPseudoStyle; pageContentPseudoStyle = styleSet->ResolveAnonymousBoxStyle(nsCSSAnonBoxes::pageContent, pagePseudoStyle); nsContainerFrame* pageContentFrame = NS_NewPageContentFrame(aPresShell, pageContentPseudoStyle); // Initialize the page content frame and force it to have a view. Also make it the // containing block for fixed elements which are repeated on every page. nsIFrame* prevPageContentFrame = nullptr; if (aPrevPageFrame) { prevPageContentFrame = aPrevPageFrame->GetFirstPrincipalChild(); NS_ASSERTION(prevPageContentFrame, "missing page content frame"); } pageContentFrame->Init(nullptr, pageFrame, prevPageContentFrame); SetInitialSingleChild(pageFrame, pageContentFrame); // Make it an absolute container for fixed-pos elements pageContentFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); pageContentFrame->MarkAsAbsoluteContainingBlock(); RefPtr canvasPseudoStyle; canvasPseudoStyle = styleSet->ResolveAnonymousBoxStyle(nsCSSAnonBoxes::canvas, pageContentPseudoStyle); aCanvasFrame = NS_NewCanvasFrame(aPresShell, canvasPseudoStyle); nsIFrame* prevCanvasFrame = nullptr; if (prevPageContentFrame) { prevCanvasFrame = prevPageContentFrame->GetFirstPrincipalChild(); NS_ASSERTION(prevCanvasFrame, "missing canvas frame"); } aCanvasFrame->Init(nullptr, pageContentFrame, prevCanvasFrame); SetInitialSingleChild(pageContentFrame, aCanvasFrame); return pageFrame; } /* static */ nsIFrame* nsCSSFrameConstructor::CreatePlaceholderFrameFor(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame* aFrame, nsStyleContext* aStyleContext, nsContainerFrame* aParentFrame, nsIFrame* aPrevInFlow, nsFrameState aTypeBit) { RefPtr placeholderStyle = aPresShell->StyleSet()-> ResolveStyleForNonElement(aStyleContext->GetParent()); // The placeholder frame gets a pseudo style context nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)NS_NewPlaceholderFrame(aPresShell, placeholderStyle, aTypeBit); placeholderFrame->Init(aContent, aParentFrame, aPrevInFlow); // The placeholder frame has a pointer back to the out-of-flow frame placeholderFrame->SetOutOfFlowFrame(aFrame); aFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); // Add mapping from absolutely positioned frame to its placeholder frame aPresShell->FrameManager()->RegisterPlaceholderFrame(placeholderFrame); return placeholderFrame; } // Clears any lazy bits set in the range [aStartContent, aEndContent). If // aEndContent is null, that means to clear bits in all siblings starting with // aStartContent. aStartContent must not be null unless aEndContent is also // null. We do this so that when new children are inserted under elements whose // frame is a leaf the new children don't cause us to try to construct frames // for the existing children again. static inline void ClearLazyBits(nsIContent* aStartContent, nsIContent* aEndContent) { NS_PRECONDITION(aStartContent || !aEndContent, "Must have start child if we have an end child"); for (nsIContent* cur = aStartContent; cur != aEndContent; cur = cur->GetNextSibling()) { cur->UnsetFlags(NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME); } } nsIFrame* nsCSSFrameConstructor::ConstructSelectFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; // Construct a frame-based listbox or combobox dom::HTMLSelectElement* sel = dom::HTMLSelectElement::FromContent(content); MOZ_ASSERT(sel); if (sel->IsCombobox()) { // Construct a frame-based combo box. // The frame-based combo box is built out of three parts. A display area, a button and // a dropdown list. The display area and button are created through anonymous content. // The drop-down list's frame is created explicitly. The combobox frame shares its content // with the drop-down list. nsFrameState flags = NS_BLOCK_FLOAT_MGR; nsContainerFrame* comboboxFrame = NS_NewComboboxControlFrame(mPresShell, styleContext, flags); // Save the history state so we don't restore during construction // since the complete tree is required before we restore. nsILayoutHistoryState *historyState = aState.mFrameState; aState.mFrameState = nullptr; // Initialize the combobox frame InitAndRestoreFrame(aState, content, aState.GetGeometricParent(aStyleDisplay, aParentFrame), comboboxFrame); aState.AddChild(comboboxFrame, aFrameItems, content, styleContext, aParentFrame); nsIComboboxControlFrame* comboBox = do_QueryFrame(comboboxFrame); NS_ASSERTION(comboBox, "NS_NewComboboxControlFrame returned frame that " "doesn't implement nsIComboboxControlFrame"); // Resolve pseudo element style for the dropdown list RefPtr listStyle; listStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::dropDownList, styleContext); // Create a listbox nsContainerFrame* listFrame = NS_NewListControlFrame(mPresShell, listStyle); // Notify the listbox that it is being used as a dropdown list. nsIListControlFrame * listControlFrame = do_QueryFrame(listFrame); if (listControlFrame) { listControlFrame->SetComboboxFrame(comboboxFrame); } // Notify combobox that it should use the listbox as it's popup comboBox->SetDropDown(listFrame); NS_ASSERTION(!listFrame->IsAbsPosContaininingBlock(), "Ended up with positioned dropdown list somehow."); NS_ASSERTION(!listFrame->IsFloating(), "Ended up with floating dropdown list somehow."); // Initialize the scroll frame positioned. Note that it is NOT // initialized as absolutely positioned. nsContainerFrame* scrolledFrame = NS_NewSelectsAreaFrame(mPresShell, styleContext, flags); InitializeSelectFrame(aState, listFrame, scrolledFrame, content, comboboxFrame, listStyle, true, aItem.mPendingBinding, aFrameItems); NS_ASSERTION(listFrame->GetView(), "ListFrame's view is nullptr"); // Create display and button frames from the combobox's anonymous content. // The anonymous content is appended to existing anonymous content for this // element (the scrollbars). nsFrameItems childItems; CreateAnonymousFrames(aState, content, comboboxFrame, aItem.mPendingBinding, childItems); comboboxFrame->SetInitialChildList(kPrincipalList, childItems); // Initialize the additional popup child list which contains the // dropdown list frame. nsFrameItems popupItems; popupItems.AddChild(listFrame); comboboxFrame->SetInitialChildList(nsIFrame::kSelectPopupList, popupItems); aState.mFrameState = historyState; if (aState.mFrameState) { // Restore frame state for the entire subtree of |comboboxFrame|. RestoreFrameState(comboboxFrame, aState.mFrameState); } return comboboxFrame; } // Listbox, not combobox nsContainerFrame* listFrame = NS_NewListControlFrame(mPresShell, styleContext); nsContainerFrame* scrolledFrame = NS_NewSelectsAreaFrame( mPresShell, styleContext, NS_BLOCK_FLOAT_MGR); // ******* this code stolen from Initialze ScrollFrame ******** // please adjust this code to use BuildScrollFrame. InitializeSelectFrame(aState, listFrame, scrolledFrame, content, aParentFrame, styleContext, false, aItem.mPendingBinding, aFrameItems); return listFrame; } /** * Used to be InitializeScrollFrame but now it's only used for the select tag * But the select tag should really be fixed to use GFX scrollbars that can * be create with BuildScrollFrame. */ nsresult nsCSSFrameConstructor::InitializeSelectFrame(nsFrameConstructorState& aState, nsContainerFrame* scrollFrame, nsContainerFrame* scrolledFrame, nsIContent* aContent, nsContainerFrame* aParentFrame, nsStyleContext* aStyleContext, bool aBuildCombobox, PendingBinding* aPendingBinding, nsFrameItems& aFrameItems) { // Initialize it nsContainerFrame* geometricParent = aState.GetGeometricParent(aStyleContext->StyleDisplay(), aParentFrame); // We don't call InitAndRestoreFrame for scrollFrame because we can only // restore the frame state after its parts have been created (in particular, // the scrollable view). So we have to split Init and Restore. scrollFrame->Init(aContent, geometricParent, nullptr); if (!aBuildCombobox) { aState.AddChild(scrollFrame, aFrameItems, aContent, aStyleContext, aParentFrame); } if (aBuildCombobox) { nsContainerFrame::CreateViewForFrame(scrollFrame, true); } BuildScrollFrame(aState, aContent, aStyleContext, scrolledFrame, geometricParent, scrollFrame); if (aState.mFrameState) { // Restore frame state for the scroll frame RestoreFrameStateFor(scrollFrame, aState.mFrameState); } // Process children nsFrameItems childItems; ProcessChildren(aState, aContent, aStyleContext, scrolledFrame, false, childItems, false, aPendingBinding); // Set the scrolled frame's initial child lists scrolledFrame->SetInitialChildList(kPrincipalList, childItems); return NS_OK; } nsIFrame* nsCSSFrameConstructor::ConstructFieldSetFrame(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aStyleDisplay, nsFrameItems& aFrameItems) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsContainerFrame* fieldsetFrame = NS_NewFieldSetFrame(mPresShell, styleContext); // Initialize it InitAndRestoreFrame(aState, content, aState.GetGeometricParent(aStyleDisplay, aParentFrame), fieldsetFrame); // Resolve style and initialize the frame RefPtr fieldsetContentStyle; fieldsetContentStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::fieldsetContent, styleContext); const nsStyleDisplay* fieldsetContentDisplay = fieldsetContentStyle->StyleDisplay(); bool isScrollable = fieldsetContentDisplay->IsScrollableOverflow(); nsContainerFrame* scrollFrame = nullptr; if (isScrollable) { fieldsetContentStyle = BeginBuildingScrollFrame(aState, content, fieldsetContentStyle, fieldsetFrame, nsCSSAnonBoxes::scrolledContent, false, scrollFrame); } nsContainerFrame* blockFrame = NS_NewBlockFrame(mPresShell, fieldsetContentStyle, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); InitAndRestoreFrame(aState, content, scrollFrame ? scrollFrame : fieldsetFrame, blockFrame); aState.AddChild(fieldsetFrame, aFrameItems, content, styleContext, aParentFrame); // Process children nsFrameConstructorSaveState absoluteSaveState; nsFrameItems childItems; blockFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); if (fieldsetFrame->IsAbsPosContaininingBlock()) { aState.PushAbsoluteContainingBlock(blockFrame, fieldsetFrame, absoluteSaveState); } ProcessChildren(aState, content, styleContext, blockFrame, true, childItems, true, aItem.mPendingBinding); nsFrameItems fieldsetKids; fieldsetKids.AddChild(scrollFrame ? scrollFrame : blockFrame); for (nsFrameList::Enumerator e(childItems); !e.AtEnd(); e.Next()) { nsIFrame* child = e.get(); nsContainerFrame* cif = child->GetContentInsertionFrame(); if (cif && cif->GetType() == nsGkAtoms::legendFrame) { // We want the legend to be the first frame in the fieldset child list. // That way the EventStateManager will do the right thing when tabbing // from a selection point within the legend (bug 236071), which is // used for implementing legend access keys (bug 81481). // GetAdjustedParentFrame() below depends on this frame order. childItems.RemoveFrame(child); // Make sure to reparent the legend so it has the fieldset as the parent. fieldsetKids.InsertFrame(fieldsetFrame, nullptr, child); if (scrollFrame) { StickyScrollContainer::NotifyReparentedFrameAcrossScrollFrameBoundary( child, blockFrame); } break; } } if (isScrollable) { FinishBuildingScrollFrame(scrollFrame, blockFrame); } // Set the inner frame's initial child lists blockFrame->SetInitialChildList(kPrincipalList, childItems); // Set the outer frame's initial child list fieldsetFrame->SetInitialChildList(kPrincipalList, fieldsetKids); fieldsetFrame->AddStateBits(NS_FRAME_MAY_HAVE_GENERATED_CONTENT); // Our new frame returned is the outer frame, which is the fieldset frame. return fieldsetFrame; } static nsIFrame* FindAncestorWithGeneratedContentPseudo(nsIFrame* aFrame) { for (nsIFrame* f = aFrame->GetParent(); f; f = f->GetParent()) { NS_ASSERTION(f->IsGeneratedContentFrame(), "should not have exited generated content"); nsIAtom* pseudo = f->StyleContext()->GetPseudo(); if (pseudo == nsCSSPseudoElements::before || pseudo == nsCSSPseudoElements::after) return f; } return nullptr; } #define SIMPLE_FCDATA(_func) FCDATA_DECL(0, _func) #define FULL_CTOR_FCDATA(_flags, _func) \ { _flags | FCDATA_FUNC_IS_FULL_CTOR, { nullptr }, _func, nullptr } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindTextData(nsIFrame* aParentFrame) { if (aParentFrame && IsFrameForSVG(aParentFrame)) { nsIFrame *ancestorFrame = nsSVGUtils::GetFirstNonAAncestorFrame(aParentFrame); if (ancestorFrame) { static const FrameConstructionData sSVGTextData = FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_IS_SVG_TEXT, NS_NewTextFrame); if (ancestorFrame->IsSVGText()) { return &sSVGTextData; } } return nullptr; } static const FrameConstructionData sTextData = FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT, NS_NewTextFrame); return &sTextData; } void nsCSSFrameConstructor::ConstructTextFrame(const FrameConstructionData* aData, nsFrameConstructorState& aState, nsIContent* aContent, nsContainerFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aFrameItems) { NS_PRECONDITION(aData, "Must have frame construction data"); nsIFrame* newFrame = (*aData->mFunc.mCreationFunc)(mPresShell, aStyleContext); InitAndRestoreFrame(aState, aContent, aParentFrame, newFrame); // We never need to create a view for a text frame. if (newFrame->IsGeneratedContentFrame()) { nsAutoPtr initializer; initializer = static_cast( aContent->UnsetProperty(nsGkAtoms::genConInitializerProperty)); if (initializer) { if (initializer->mNode->InitTextFrame(initializer->mList, FindAncestorWithGeneratedContentPseudo(newFrame), newFrame)) { (this->*(initializer->mDirtyAll))(); } initializer->mNode.forget(); } } // Add the newly constructed frame to the flow aFrameItems.AddChild(newFrame); if (!aState.mCreatingExtraFrames) aContent->SetPrimaryFrame(newFrame); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDataByInt(int32_t aInt, Element* aElement, nsStyleContext* aStyleContext, const FrameConstructionDataByInt* aDataPtr, uint32_t aDataLength) { for (const FrameConstructionDataByInt *curData = aDataPtr, *endData = aDataPtr + aDataLength; curData != endData; ++curData) { if (curData->mInt == aInt) { const FrameConstructionData* data = &curData->mData; if (data->mBits & FCDATA_FUNC_IS_DATA_GETTER) { return data->mFunc.mDataGetter(aElement, aStyleContext); } return data; } } return nullptr; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDataByTag(nsIAtom* aTag, Element* aElement, nsStyleContext* aStyleContext, const FrameConstructionDataByTag* aDataPtr, uint32_t aDataLength) { for (const FrameConstructionDataByTag *curData = aDataPtr, *endData = aDataPtr + aDataLength; curData != endData; ++curData) { if (*curData->mTag == aTag) { const FrameConstructionData* data = &curData->mData; if (data->mBits & FCDATA_FUNC_IS_DATA_GETTER) { return data->mFunc.mDataGetter(aElement, aStyleContext); } return data; } } return nullptr; } #define SUPPRESS_FCDATA() FCDATA_DECL(FCDATA_SUPPRESS_FRAME, nullptr) #define SIMPLE_INT_CREATE(_int, _func) { _int, SIMPLE_FCDATA(_func) } #define SIMPLE_INT_CHAIN(_int, _func) \ { _int, FCDATA_DECL(FCDATA_FUNC_IS_DATA_GETTER, _func) } #define COMPLEX_INT_CREATE(_int, _func) \ { _int, FULL_CTOR_FCDATA(0, _func) } #define SIMPLE_TAG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_FCDATA(_func) } #define SIMPLE_TAG_CHAIN(_tag, _func) \ { &nsGkAtoms::_tag, FCDATA_DECL(FCDATA_FUNC_IS_DATA_GETTER, _func) } #define COMPLEX_TAG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, FULL_CTOR_FCDATA(0, _func) } static bool IsFrameForFieldSet(nsIFrame* aFrame, nsIAtom* aFrameType) { nsIAtom* pseudo = aFrame->StyleContext()->GetPseudo(); if (pseudo == nsCSSAnonBoxes::fieldsetContent || pseudo == nsCSSAnonBoxes::scrolledContent) { return IsFrameForFieldSet(aFrame->GetParent(), aFrame->GetParent()->GetType()); } return aFrameType == nsGkAtoms::fieldSetFrame; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindHTMLData(Element* aElement, nsIAtom* aTag, int32_t aNameSpaceID, nsIFrame* aParentFrame, nsStyleContext* aStyleContext) { // Ignore the tag if it's not HTML content and if it doesn't extend (via XBL) // a valid HTML namespace. This check must match the one in // ShouldHaveFirstLineStyle. if (aNameSpaceID != kNameSpaceID_XHTML) { return nullptr; } NS_ASSERTION(!aParentFrame || aParentFrame->StyleContext()->GetPseudo() != nsCSSAnonBoxes::fieldsetContent || aParentFrame->GetParent()->GetType() == nsGkAtoms::fieldSetFrame, "Unexpected parent for fieldset content anon box"); if (aTag == nsGkAtoms::legend && (!aParentFrame || !IsFrameForFieldSet(aParentFrame, aParentFrame->GetType()) || aStyleContext->StyleDisplay()->IsFloatingStyle() || aStyleContext->StyleDisplay()->IsAbsolutelyPositionedStyle())) { // is only special inside fieldset, we only check the frame tree // parent because the content tree parent may not be a
due to // display:contents, Shadow DOM, or XBL. For floated or absolutely // positioned legends we want to construct by display type and // not do special legend stuff. return nullptr; } static const FrameConstructionDataByTag sHTMLData[] = { SIMPLE_TAG_CHAIN(img, nsCSSFrameConstructor::FindImgData), SIMPLE_TAG_CHAIN(mozgeneratedcontentimage, nsCSSFrameConstructor::FindImgData), { &nsGkAtoms::br, FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_IS_LINE_BREAK, NS_NewBRFrame) }, SIMPLE_TAG_CREATE(wbr, NS_NewWBRFrame), SIMPLE_TAG_CHAIN(input, nsCSSFrameConstructor::FindInputData), SIMPLE_TAG_CREATE(textarea, NS_NewTextControlFrame), COMPLEX_TAG_CREATE(select, &nsCSSFrameConstructor::ConstructSelectFrame), SIMPLE_TAG_CHAIN(object, nsCSSFrameConstructor::FindObjectData), SIMPLE_TAG_CHAIN(applet, nsCSSFrameConstructor::FindObjectData), SIMPLE_TAG_CHAIN(embed, nsCSSFrameConstructor::FindObjectData), COMPLEX_TAG_CREATE(fieldset, &nsCSSFrameConstructor::ConstructFieldSetFrame), { &nsGkAtoms::legend, FCDATA_DECL(FCDATA_ALLOW_BLOCK_STYLES | FCDATA_MAY_NEED_SCROLLFRAME, NS_NewLegendFrame) }, SIMPLE_TAG_CREATE(frameset, NS_NewHTMLFramesetFrame), SIMPLE_TAG_CREATE(iframe, NS_NewSubDocumentFrame), { &nsGkAtoms::button, FCDATA_WITH_WRAPPING_BLOCK(FCDATA_ALLOW_BLOCK_STYLES, NS_NewHTMLButtonControlFrame, nsCSSAnonBoxes::buttonContent) }, SIMPLE_TAG_CHAIN(canvas, nsCSSFrameConstructor::FindCanvasData), SIMPLE_TAG_CREATE(video, NS_NewHTMLVideoFrame), SIMPLE_TAG_CREATE(audio, NS_NewHTMLVideoFrame), SIMPLE_TAG_CREATE(progress, NS_NewProgressFrame), SIMPLE_TAG_CREATE(meter, NS_NewMeterFrame) }; return FindDataByTag(aTag, aElement, aStyleContext, sHTMLData, ArrayLength(sHTMLData)); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindImgData(Element* aElement, nsStyleContext* aStyleContext) { if (!nsImageFrame::ShouldCreateImageFrameFor(aElement, aStyleContext)) { return nullptr; } static const FrameConstructionData sImgData = SIMPLE_FCDATA(NS_NewImageFrame); return &sImgData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindImgControlData(Element* aElement, nsStyleContext* aStyleContext) { if (!nsImageFrame::ShouldCreateImageFrameFor(aElement, aStyleContext)) { return nullptr; } static const FrameConstructionData sImgControlData = SIMPLE_FCDATA(NS_NewImageControlFrame); return &sImgControlData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindInputData(Element* aElement, nsStyleContext* aStyleContext) { static const FrameConstructionDataByInt sInputData[] = { SIMPLE_INT_CREATE(NS_FORM_INPUT_CHECKBOX, NS_NewGfxCheckboxControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_RADIO, NS_NewGfxRadioControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_FILE, NS_NewFileControlFrame), SIMPLE_INT_CHAIN(NS_FORM_INPUT_IMAGE, nsCSSFrameConstructor::FindImgControlData), SIMPLE_INT_CREATE(NS_FORM_INPUT_EMAIL, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_SEARCH, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_TEXT, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_TEL, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_URL, NS_NewTextControlFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_RANGE, NS_NewRangeFrame), SIMPLE_INT_CREATE(NS_FORM_INPUT_PASSWORD, NS_NewTextControlFrame), { NS_FORM_INPUT_COLOR, FCDATA_WITH_WRAPPING_BLOCK(0, NS_NewColorControlFrame, nsCSSAnonBoxes::buttonContent) }, // TODO: this is temporary until a frame is written: bug 635240. SIMPLE_INT_CREATE(NS_FORM_INPUT_NUMBER, NS_NewNumberControlFrame), // TODO: this is temporary until a frame is written: bug 773205. SIMPLE_INT_CREATE(NS_FORM_INPUT_DATE, NS_NewTextControlFrame), // TODO: this is temporary until a frame is written: bug 773205 SIMPLE_INT_CREATE(NS_FORM_INPUT_TIME, NS_NewTextControlFrame), { NS_FORM_INPUT_SUBMIT, FCDATA_WITH_WRAPPING_BLOCK(0, NS_NewGfxButtonControlFrame, nsCSSAnonBoxes::buttonContent) }, { NS_FORM_INPUT_RESET, FCDATA_WITH_WRAPPING_BLOCK(0, NS_NewGfxButtonControlFrame, nsCSSAnonBoxes::buttonContent) }, { NS_FORM_INPUT_BUTTON, FCDATA_WITH_WRAPPING_BLOCK(0, NS_NewGfxButtonControlFrame, nsCSSAnonBoxes::buttonContent) } // Keeping hidden inputs out of here on purpose for so they get frames by // display (in practice, none). }; nsCOMPtr control = do_QueryInterface(aElement); NS_ASSERTION(control, "input doesn't implement nsIFormControl?"); return FindDataByInt(control->GetType(), aElement, aStyleContext, sInputData, ArrayLength(sInputData)); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindObjectData(Element* aElement, nsStyleContext* aStyleContext) { // GetDisplayedType isn't necessarily nsIObjectLoadingContent::TYPE_NULL for // cases when the object is broken/suppressed/etc (e.g. a broken image), but // we want to treat those cases as TYPE_NULL uint32_t type; if (aElement->State().HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN | NS_EVENT_STATE_USERDISABLED | NS_EVENT_STATE_SUPPRESSED)) { type = nsIObjectLoadingContent::TYPE_NULL; } else { nsCOMPtr objContent(do_QueryInterface(aElement)); NS_ASSERTION(objContent, "applet, embed and object must implement " "nsIObjectLoadingContent!"); objContent->GetDisplayedType(&type); } static const FrameConstructionDataByInt sObjectData[] = { SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_LOADING, NS_NewEmptyFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_PLUGIN, NS_NewObjectFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_IMAGE, NS_NewImageFrame), SIMPLE_INT_CREATE(nsIObjectLoadingContent::TYPE_DOCUMENT, NS_NewSubDocumentFrame) // Nothing for TYPE_NULL so we'll construct frames by display there }; return FindDataByInt((int32_t)type, aElement, aStyleContext, sObjectData, ArrayLength(sObjectData)); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindCanvasData(Element* aElement, nsStyleContext* aStyleContext) { // We want to check whether script is enabled on the document that // could be painting to the canvas. That's the owner document of // the canvas, except when the owner document is a static document, // in which case it's the original document it was cloned from. nsIDocument* doc = aElement->OwnerDoc(); if (doc->IsStaticDocument()) { doc = doc->GetOriginalDocument(); } if (!doc->IsScriptEnabled()) { return nullptr; } static const FrameConstructionData sCanvasData = FCDATA_WITH_WRAPPING_BLOCK(0, NS_NewHTMLCanvasFrame, nsCSSAnonBoxes::htmlCanvasContent); return &sCanvasData; } void nsCSSFrameConstructor::ConstructFrameFromItemInternal(FrameConstructionItem& aItem, nsFrameConstructorState& aState, nsContainerFrame* aParentFrame, nsFrameItems& aFrameItems) { const FrameConstructionData* data = aItem.mFCData; NS_ASSERTION(data, "Must have frame construction data"); uint32_t bits = data->mBits; NS_ASSERTION(!(bits & FCDATA_FUNC_IS_DATA_GETTER), "Should have dealt with this inside the data finder"); // Some sets of bits are not compatible with each other #define CHECK_ONLY_ONE_BIT(_bit1, _bit2) \ NS_ASSERTION(!(bits & _bit1) || !(bits & _bit2), \ "Only one of these bits should be set") CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_FORCE_NULL_ABSPOS_CONTAINER); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_WRAP_KIDS_IN_BLOCKS); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_MAY_NEED_SCROLLFRAME); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_IS_POPUP); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_SKIP_ABSPOS_PUSH); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_DISALLOW_GENERATED_CONTENT); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_ALLOW_BLOCK_STYLES); CHECK_ONLY_ONE_BIT(FCDATA_FUNC_IS_FULL_CTOR, FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS); CHECK_ONLY_ONE_BIT(FCDATA_WRAP_KIDS_IN_BLOCKS, FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS); #undef CHECK_ONLY_ONE_BIT NS_ASSERTION(!(bits & FCDATA_FORCED_NON_SCROLLABLE_BLOCK) || ((bits & FCDATA_FUNC_IS_FULL_CTOR) && data->mFullConstructor == &nsCSSFrameConstructor::ConstructNonScrollableBlock), "Unexpected FCDATA_FORCED_NON_SCROLLABLE_BLOCK flag"); // Don't create a subdocument frame for iframes if we're creating extra frames if (aState.mCreatingExtraFrames && aItem.mContent->IsHTMLElement(nsGkAtoms::iframe)) { return; } nsIContent* const content = aItem.mContent; nsIContent* parent = content->GetParent(); // Push display:contents ancestors. AutoDisplayContentsAncestorPusher adcp(aState.mTreeMatchContext, aState.mPresContext, parent); // Get the parent of the content and check if it is a XBL children element. // Push the children element as an ancestor here because it does // not have a frame and would not otherwise be pushed as an ancestor. It is // necessary to do so in order to correctly handle style resolution on // descendants. (If !adcp.IsEmpty() then it was already pushed by // AutoDisplayContentsAncestorPusher above.) TreeMatchContext::AutoAncestorPusher insertionPointPusher(aState.mTreeMatchContext); if (adcp.IsEmpty() && parent && nsContentUtils::IsContentInsertionPoint(parent)) { if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { insertionPointPusher.PushAncestorAndStyleScope(parent); } else { insertionPointPusher.PushStyleScope(parent); } } // Push the content as a style ancestor now, so we don't have to do // it in our various full-constructor functions. In particular, // since a number of full-constructor functions don't actually call // ProcessChildren in some cases (e.g. for CSS anonymous table boxes // or for situations where only anonymouse children are having // frames constructed), this is the best place to bottleneck the // pushing of the content instead of having to do it in multiple // places. TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext); if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { ancestorPusher.PushAncestorAndStyleScope(content); } else { ancestorPusher.PushStyleScope(content); } nsIFrame* newFrame; nsIFrame* primaryFrame; nsStyleContext* const styleContext = aItem.mStyleContext; const nsStyleDisplay* display = styleContext->StyleDisplay(); if (bits & FCDATA_FUNC_IS_FULL_CTOR) { newFrame = (this->*(data->mFullConstructor))(aState, aItem, aParentFrame, display, aFrameItems); MOZ_ASSERT(newFrame, "Full constructor failed"); primaryFrame = newFrame; } else { newFrame = (*data->mFunc.mCreationFunc)(mPresShell, styleContext); bool allowOutOfFlow = !(bits & FCDATA_DISALLOW_OUT_OF_FLOW); bool isPopup = aItem.mIsPopup; NS_ASSERTION(!isPopup || (aState.mPopupItems.containingBlock && aState.mPopupItems.containingBlock->GetType() == nsGkAtoms::popupSetFrame), "Should have a containing block here!"); nsContainerFrame* geometricParent = isPopup ? aState.mPopupItems.containingBlock : (allowOutOfFlow ? aState.GetGeometricParent(display, aParentFrame) : aParentFrame); // Must init frameToAddToList to null, since it's inout nsIFrame* frameToAddToList = nullptr; if ((bits & FCDATA_MAY_NEED_SCROLLFRAME) && display->IsScrollableOverflow()) { nsContainerFrame* scrollframe = nullptr; BuildScrollFrame(aState, content, styleContext, newFrame, geometricParent, scrollframe); frameToAddToList = scrollframe; } else { InitAndRestoreFrame(aState, content, geometricParent, newFrame); // See whether we need to create a view nsContainerFrame::CreateViewForFrame(newFrame, false); frameToAddToList = newFrame; } // Use frameToAddToList as the primary frame. In the non-scrollframe case // they're equal, but in the scrollframe case newFrame is the scrolled // frame, while frameToAddToList is the scrollframe (and should be the // primary frame). primaryFrame = frameToAddToList; // If we need to create a block formatting context to wrap our // kids, do it now. const nsStyleDisplay* maybeAbsoluteContainingBlockDisplay = display; nsIFrame* maybeAbsoluteContainingBlockStyleFrame = primaryFrame; nsIFrame* maybeAbsoluteContainingBlock = newFrame; nsIFrame* possiblyLeafFrame = newFrame; if (bits & FCDATA_CREATE_BLOCK_WRAPPER_FOR_ALL_KIDS) { RefPtr blockContext; blockContext = mPresShell->StyleSet()->ResolveAnonymousBoxStyle(*data->mAnonBoxPseudo, styleContext); nsIFrame* blockFrame = NS_NewBlockFormattingContext(mPresShell, blockContext); #ifdef DEBUG nsContainerFrame* containerFrame = do_QueryFrame(newFrame); MOZ_ASSERT(containerFrame); #endif nsContainerFrame* container = static_cast(newFrame); InitAndRestoreFrame(aState, content, container, blockFrame); SetInitialSingleChild(container, blockFrame); // Now figure out whether newFrame or blockFrame should be the // absolute container. It should be the latter if it's // positioned, otherwise the former. const nsStyleDisplay* blockDisplay = blockContext->StyleDisplay(); if (blockDisplay->IsAbsPosContainingBlock(blockFrame)) { maybeAbsoluteContainingBlockDisplay = blockDisplay; maybeAbsoluteContainingBlock = blockFrame; maybeAbsoluteContainingBlockStyleFrame = blockFrame; } // Our kids should go into the blockFrame newFrame = blockFrame; } aState.AddChild(frameToAddToList, aFrameItems, content, styleContext, aParentFrame, allowOutOfFlow, allowOutOfFlow, isPopup); nsContainerFrame* newFrameAsContainer = do_QueryFrame(newFrame); if (newFrameAsContainer) { #ifdef MOZ_XUL // Icky XUL stuff, sadly if (aItem.mIsRootPopupgroup) { NS_ASSERTION(nsIRootBox::GetRootBox(mPresShell) && nsIRootBox::GetRootBox(mPresShell)->GetPopupSetFrame() == newFrame, "Unexpected PopupSetFrame"); aState.mPopupItems.containingBlock = newFrameAsContainer; aState.mHavePendingPopupgroup = false; } #endif /* MOZ_XUL */ // Process the child content if requested nsFrameItems childItems; nsFrameConstructorSaveState absoluteSaveState; if (bits & FCDATA_FORCE_NULL_ABSPOS_CONTAINER) { aState.PushAbsoluteContainingBlock(nullptr, nullptr, absoluteSaveState); } else if (!(bits & FCDATA_SKIP_ABSPOS_PUSH)) { maybeAbsoluteContainingBlock->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); // This check is identical to nsStyleDisplay::IsAbsPosContainingBlock // except without the assertion that the style display and frame match. // When constructing scroll frames we intentionally use the style // display for the outer, but make the inner the containing block. if ((maybeAbsoluteContainingBlockDisplay->IsAbsolutelyPositionedStyle() || maybeAbsoluteContainingBlockDisplay->IsRelativelyPositionedStyle() || maybeAbsoluteContainingBlockDisplay->IsFixedPosContainingBlock( maybeAbsoluteContainingBlockStyleFrame)) && !maybeAbsoluteContainingBlockStyleFrame->IsSVGText()) { nsContainerFrame* cf = static_cast( maybeAbsoluteContainingBlock); aState.PushAbsoluteContainingBlock(cf, cf, absoluteSaveState); } } if (!aItem.mAnonChildren.IsEmpty()) { NS_ASSERTION(!(bits & FCDATA_USE_CHILD_ITEMS), "We should not have both anonymous and non-anonymous " "children in a given FrameConstructorItem"); AddFCItemsForAnonymousContent(aState, newFrameAsContainer, aItem.mAnonChildren, aItem.mChildItems); bits |= FCDATA_USE_CHILD_ITEMS; } if (bits & FCDATA_USE_CHILD_ITEMS) { nsFrameConstructorSaveState floatSaveState; if (ShouldSuppressFloatingOfDescendants(newFrame)) { aState.PushFloatContainingBlock(nullptr, floatSaveState); } else if (newFrame->IsFloatContainingBlock()) { aState.PushFloatContainingBlock(newFrameAsContainer, floatSaveState); } ConstructFramesFromItemList(aState, aItem.mChildItems, newFrameAsContainer, childItems); } else { // Process the child frames. ProcessChildren(aState, content, styleContext, newFrameAsContainer, !(bits & FCDATA_DISALLOW_GENERATED_CONTENT), childItems, (bits & FCDATA_ALLOW_BLOCK_STYLES) != 0, aItem.mPendingBinding, possiblyLeafFrame); } if (bits & FCDATA_WRAP_KIDS_IN_BLOCKS) { nsFrameItems newItems; nsFrameItems currentBlockItems; nsIFrame* f; while ((f = childItems.FirstChild()) != nullptr) { bool wrapFrame = IsInlineFrame(f) || IsFramePartOfIBSplit(f); if (!wrapFrame) { FlushAccumulatedBlock(aState, content, newFrameAsContainer, currentBlockItems, newItems); } childItems.RemoveFrame(f); if (wrapFrame) { currentBlockItems.AddChild(f); } else { newItems.AddChild(f); } } FlushAccumulatedBlock(aState, content, newFrameAsContainer, currentBlockItems, newItems); if (childItems.NotEmpty()) { // an error must have occurred, delete unprocessed frames childItems.DestroyFrames(); } childItems = newItems; } // Set the frame's initial child list // Note that MathML depends on this being called even if // childItems is empty! newFrameAsContainer->SetInitialChildList(kPrincipalList, childItems); } } #ifdef MOZ_XUL // More icky XUL stuff if (aItem.mNameSpaceID == kNameSpaceID_XUL && (aItem.mTag == nsGkAtoms::treechildren || // trees always need titletips content->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext) || content->HasAttr(kNameSpaceID_None, nsGkAtoms::tooltip))) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox) { rootBox->AddTooltipSupport(content); } } #endif NS_ASSERTION(newFrame->IsFrameOfType(nsIFrame::eLineParticipant) == ((bits & FCDATA_IS_LINE_PARTICIPANT) != 0), "Incorrectly set FCDATA_IS_LINE_PARTICIPANT bits"); if (aItem.mIsAnonymousContentCreatorContent) { primaryFrame->AddStateBits(NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT); } // Even if mCreatingExtraFrames is set, we may need to SetPrimaryFrame for // generated content that doesn't have one yet. Note that we have to examine // the frame bit, because by this point mIsGeneratedContent has been cleared // on aItem. if ((!aState.mCreatingExtraFrames || ((primaryFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) && !aItem.mContent->GetPrimaryFrame())) && !(bits & FCDATA_SKIP_FRAMESET)) { aItem.mContent->SetPrimaryFrame(primaryFrame); ActiveLayerTracker::TransferActivityToFrame(aItem.mContent, primaryFrame); } } // after the node has been constructed and initialized create any // anonymous content a node needs. nsresult nsCSSFrameConstructor::CreateAnonymousFrames(nsFrameConstructorState& aState, nsIContent* aParent, nsContainerFrame* aParentFrame, PendingBinding* aPendingBinding, nsFrameItems& aChildItems) { nsAutoTArray newAnonymousItems; nsresult rv = GetAnonymousContent(aParent, aParentFrame, newAnonymousItems); NS_ENSURE_SUCCESS(rv, rv); uint32_t count = newAnonymousItems.Length(); if (count == 0) { return NS_OK; } nsFrameConstructorState::PendingBindingAutoPusher pusher(aState, aPendingBinding); TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext); if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { ancestorPusher.PushAncestorAndStyleScope(aParent->AsElement()); } else { ancestorPusher.PushStyleScope(aParent->AsElement()); } nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame); NS_ASSERTION(creator, "How can that happen if we have nodes to construct frames for?"); InsertionPoint insertion(aParentFrame, aParent); for (uint32_t i=0; i < count; i++) { nsIContent* content = newAnonymousItems[i].mContent; NS_ASSERTION(content, "null anonymous content?"); NS_ASSERTION(!newAnonymousItems[i].mStyleContext, "Unexpected style context"); NS_ASSERTION(newAnonymousItems[i].mChildren.IsEmpty(), "This method is not currently used with frames that implement " "nsIAnonymousContentCreator::CreateAnonymousContent to " "output a list where the items have their own children"); nsIFrame* newFrame = creator->CreateFrameFor(content); if (newFrame) { NS_ASSERTION(content->GetPrimaryFrame(), "Content must have a primary frame now"); newFrame->AddStateBits(NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT); aChildItems.AddChild(newFrame); } else { FrameConstructionItemList items; { // Skip parent display based style-fixup during our // AddFrameConstructionItems() call: TreeMatchContext::AutoParentDisplayBasedStyleFixupSkipper parentDisplayBasedStyleFixupSkipper(aState.mTreeMatchContext); AddFrameConstructionItems(aState, content, true, insertion, items); } ConstructFramesFromItemList(aState, items, aParentFrame, aChildItems); } } return NS_OK; } static void SetFlagsOnSubtree(nsIContent *aNode, uintptr_t aFlagsToSet) { #ifdef DEBUG // Make sure that the node passed to us doesn't have any XBL children { FlattenedChildIterator iter(aNode); NS_ASSERTION(!iter.XBLInvolved() || !iter.GetNextChild(), "The node should not have any XBL children"); } #endif // Set the flag on the node itself aNode->SetFlags(aFlagsToSet); // Set the flag on all of its children recursively uint32_t count; nsIContent * const *children = aNode->GetChildArray(&count); for (uint32_t index = 0; index < count; ++index) { SetFlagsOnSubtree(children[index], aFlagsToSet); } } /** * This function takes a tree of nsIAnonymousContentCreator::ContentInfo * objects where the nsIContent nodes have just been created, and appends the * nsIContent children in the tree to their parent. The leaf nsIContent objects * are appended first to minimize the number of notifications that are sent * out (i.e. by appending as many descendants as posible while their parent is * not yet in the document tree). * * This function is used simply as a convenience so that implementations of * nsIAnonymousContentCreator::CreateAnonymousContent don't all have to have * their own code to connect the elements that they create. */ static void ConnectAnonymousTreeDescendants(nsIContent* aParent, nsTArray& aContent) { uint32_t count = aContent.Length(); for (uint32_t i=0; i < count; i++) { nsIContent* content = aContent[i].mContent; NS_ASSERTION(content, "null anonymous content?"); ConnectAnonymousTreeDescendants(content, aContent[i].mChildren); aParent->AppendChildTo(content, false); } } nsresult nsCSSFrameConstructor::GetAnonymousContent(nsIContent* aParent, nsIFrame* aParentFrame, nsTArray& aContent) { nsIAnonymousContentCreator* creator = do_QueryFrame(aParentFrame); if (!creator) return NS_OK; nsresult rv = creator->CreateAnonymousContent(aContent); if (NS_FAILED(rv)) { // CreateAnonymousContent failed, e.g. because the page has a loop. return rv; } uint32_t count = aContent.Length(); for (uint32_t i=0; i < count; i++) { // get our child's content and set its parent to our content nsIContent* content = aContent[i].mContent; NS_ASSERTION(content, "null anonymous content?"); // least-surprise CSS binding until we do the SVG specified // cascading rules for - bug 265894 if (aParentFrame->GetType() == nsGkAtoms::svgUseFrame) { content->SetFlags(NODE_IS_ANONYMOUS_ROOT); } else { content->SetIsNativeAnonymousRoot(); } ConnectAnonymousTreeDescendants(content, aContent[i].mChildren); bool anonContentIsEditable = content->HasFlag(NODE_IS_EDITABLE); // If the parent is in a shadow tree, make sure we don't // bind with a document because shadow roots and its descendants // are not in document. nsIDocument* bindDocument = aParent->HasFlag(NODE_IS_IN_SHADOW_TREE) ? nullptr : mDocument; rv = content->BindToTree(bindDocument, aParent, aParent, true); // If the anonymous content creator requested that the content should be // editable, honor its request. // We need to set the flag on the whole subtree, because existing // children's flags have already been set as part of the BindToTree operation. if (anonContentIsEditable) { NS_ASSERTION(aParentFrame->GetType() == nsGkAtoms::textInputFrame, "We only expect this for anonymous content under a text control frame"); SetFlagsOnSubtree(content, NODE_IS_EDITABLE); } if (NS_FAILED(rv)) { content->UnbindFromTree(); return rv; } } return NS_OK; } static bool IsXULDisplayType(const nsStyleDisplay* aDisplay) { return (aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX || #ifdef MOZ_XUL aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_XUL_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK || #endif aDisplay->mDisplay == NS_STYLE_DISPLAY_BOX #ifdef MOZ_XUL || aDisplay->mDisplay == NS_STYLE_DISPLAY_XUL_GRID || aDisplay->mDisplay == NS_STYLE_DISPLAY_STACK || aDisplay->mDisplay == NS_STYLE_DISPLAY_XUL_GRID_GROUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_XUL_GRID_LINE || aDisplay->mDisplay == NS_STYLE_DISPLAY_DECK || aDisplay->mDisplay == NS_STYLE_DISPLAY_POPUP || aDisplay->mDisplay == NS_STYLE_DISPLAY_GROUPBOX #endif ); } // XUL frames are not allowed to be out of flow. #define SIMPLE_XUL_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH, \ _func) #define SCROLLABLE_XUL_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH | \ FCDATA_MAY_NEED_SCROLLFRAME, _func) // .. but we allow some XUL frames to be _containers_ for out-of-flow content // (This is the same as SCROLLABLE_XUL_FCDATA, but w/o FCDATA_SKIP_ABSPOS_PUSH) #define SCROLLABLE_ABSPOS_CONTAINER_XUL_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | \ FCDATA_MAY_NEED_SCROLLFRAME, _func) #define SIMPLE_XUL_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_XUL_FCDATA(_func) } #define SCROLLABLE_XUL_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SCROLLABLE_XUL_FCDATA(_func) } #define SIMPLE_XUL_INT_CREATE(_int, _func) \ { _int, SIMPLE_XUL_FCDATA(_func) } #define SCROLLABLE_XUL_INT_CREATE(_int, _func) \ { _int, SCROLLABLE_XUL_FCDATA(_func) } #define SCROLLABLE_ABSPOS_CONTAINER_XUL_INT_CREATE(_int, _func) \ { _int, SCROLLABLE_ABSPOS_CONTAINER_XUL_FCDATA(_func) } static nsIFrame* NS_NewGridBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aStyleContext) { nsCOMPtr layout; NS_NewGridLayout2(aPresShell, getter_AddRefs(layout)); return NS_NewBoxFrame(aPresShell, aStyleContext, false, layout); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULTagData(Element* aElement, nsIAtom* aTag, int32_t aNameSpaceID, nsStyleContext* aStyleContext) { if (aNameSpaceID != kNameSpaceID_XUL) { return nullptr; } static const FrameConstructionDataByTag sXULTagData[] = { #ifdef MOZ_XUL SCROLLABLE_XUL_CREATE(button, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(checkbox, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(radio, NS_NewButtonBoxFrame), SCROLLABLE_XUL_CREATE(autorepeatbutton, NS_NewAutoRepeatBoxFrame), SCROLLABLE_XUL_CREATE(titlebar, NS_NewTitleBarFrame), SCROLLABLE_XUL_CREATE(resizer, NS_NewResizerFrame), SIMPLE_XUL_CREATE(image, NS_NewImageBoxFrame), SIMPLE_XUL_CREATE(spring, NS_NewLeafBoxFrame), SIMPLE_XUL_CREATE(spacer, NS_NewLeafBoxFrame), SIMPLE_XUL_CREATE(treechildren, NS_NewTreeBodyFrame), SIMPLE_XUL_CREATE(treecol, NS_NewTreeColFrame), SIMPLE_XUL_CREATE(text, NS_NewTextBoxFrame), SIMPLE_TAG_CHAIN(label, nsCSSFrameConstructor::FindXULLabelData), SIMPLE_TAG_CHAIN(description, nsCSSFrameConstructor::FindXULDescriptionData), SIMPLE_XUL_CREATE(menu, NS_NewMenuFrame), SIMPLE_XUL_CREATE(menubutton, NS_NewMenuFrame), SIMPLE_XUL_CREATE(menuitem, NS_NewMenuItemFrame), #ifdef XP_MACOSX SIMPLE_TAG_CHAIN(menubar, nsCSSFrameConstructor::FindXULMenubarData), #else SIMPLE_XUL_CREATE(menubar, NS_NewMenuBarFrame), #endif /* XP_MACOSX */ SIMPLE_TAG_CHAIN(popupgroup, nsCSSFrameConstructor::FindPopupGroupData), SIMPLE_XUL_CREATE(iframe, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(editor, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(browser, NS_NewSubDocumentFrame), SIMPLE_XUL_CREATE(progressmeter, NS_NewProgressMeterFrame), SIMPLE_XUL_CREATE(splitter, NS_NewSplitterFrame), SIMPLE_TAG_CHAIN(listboxbody, nsCSSFrameConstructor::FindXULListBoxBodyData), SIMPLE_TAG_CHAIN(listitem, nsCSSFrameConstructor::FindXULListItemData), #endif /* MOZ_XUL */ SIMPLE_XUL_CREATE(slider, NS_NewSliderFrame), SIMPLE_XUL_CREATE(scrollbar, NS_NewScrollbarFrame), SIMPLE_XUL_CREATE(scrollbarbutton, NS_NewScrollbarButtonFrame) }; return FindDataByTag(aTag, aElement, aStyleContext, sXULTagData, ArrayLength(sXULTagData)); } #ifdef MOZ_XUL /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindPopupGroupData(Element* aElement, nsStyleContext* /* unused */) { if (!aElement->IsRootOfNativeAnonymousSubtree()) { return nullptr; } static const FrameConstructionData sPopupSetData = SIMPLE_XUL_FCDATA(NS_NewPopupSetFrame); return &sPopupSetData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData nsCSSFrameConstructor::sXULTextBoxData = SIMPLE_XUL_FCDATA(NS_NewTextBoxFrame); /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULLabelData(Element* aElement, nsStyleContext* /* unused */) { if (aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { return &sXULTextBoxData; } static const FrameConstructionData sLabelData = SIMPLE_XUL_FCDATA(NS_NewXULLabelFrame); return &sLabelData; } static nsIFrame* NS_NewXULDescriptionFrame(nsIPresShell* aPresShell, nsStyleContext *aContext) { // XXXbz do we really need to set those flags? If the parent is not // a block we'll get them anyway, and if it is, do we want them? return NS_NewBlockFrame(aPresShell, aContext, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULDescriptionData(Element* aElement, nsStyleContext* /* unused */) { if (aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::value)) { return &sXULTextBoxData; } static const FrameConstructionData sDescriptionData = SIMPLE_XUL_FCDATA(NS_NewXULDescriptionFrame); return &sDescriptionData; } #ifdef XP_MACOSX /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULMenubarData(Element* aElement, nsStyleContext* aStyleContext) { nsCOMPtr treeItem = aStyleContext->PresContext()->GetDocShell(); if (treeItem && nsIDocShellTreeItem::typeChrome == treeItem->ItemType()) { nsCOMPtr parent; treeItem->GetParent(getter_AddRefs(parent)); if (!parent) { // This is the root. Suppress the menubar, since on Mac // window menus are not attached to the window. static const FrameConstructionData sSuppressData = SUPPRESS_FCDATA(); return &sSuppressData; } } static const FrameConstructionData sMenubarData = SIMPLE_XUL_FCDATA(NS_NewMenuBarFrame); return &sMenubarData; } #endif /* XP_MACOSX */ /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULListBoxBodyData(Element* aElement, nsStyleContext* aStyleContext) { if (aStyleContext->StyleDisplay()->mDisplay != NS_STYLE_DISPLAY_XUL_GRID_GROUP) { return nullptr; } static const FrameConstructionData sListBoxBodyData = SCROLLABLE_XUL_FCDATA(NS_NewListBoxBodyFrame); return &sListBoxBodyData; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULListItemData(Element* aElement, nsStyleContext* aStyleContext) { if (aStyleContext->StyleDisplay()->mDisplay != NS_STYLE_DISPLAY_XUL_GRID_LINE) { return nullptr; } static const FrameConstructionData sListItemData = SCROLLABLE_XUL_FCDATA(NS_NewListItemFrame); return &sListItemData; } #endif /* MOZ_XUL */ /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindXULDisplayData(const nsStyleDisplay* aDisplay, Element* aElement, nsStyleContext* aStyleContext) { static const FrameConstructionDataByInt sXULDisplayData[] = { SCROLLABLE_ABSPOS_CONTAINER_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_BOX, NS_NewBoxFrame), SCROLLABLE_ABSPOS_CONTAINER_XUL_INT_CREATE(NS_STYLE_DISPLAY_BOX, NS_NewBoxFrame), #ifdef MOZ_XUL SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_XUL_GRID, NS_NewGridBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_XUL_GRID, NS_NewGridBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_XUL_GRID_GROUP, NS_NewGridRowGroupFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_XUL_GRID_LINE, NS_NewGridRowLeafFrame), SIMPLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_DECK, NS_NewDeckFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_GROUPBOX, NS_NewGroupBoxFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_INLINE_STACK, NS_NewStackFrame), SCROLLABLE_XUL_INT_CREATE(NS_STYLE_DISPLAY_STACK, NS_NewStackFrame), { NS_STYLE_DISPLAY_POPUP, FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_IS_POPUP | FCDATA_SKIP_ABSPOS_PUSH, NS_NewMenuPopupFrame) } #endif /* MOZ_XUL */ }; // Processing by display here: return FindDataByInt(aDisplay->mDisplay, aElement, aStyleContext, sXULDisplayData, ArrayLength(sXULDisplayData)); } already_AddRefed nsCSSFrameConstructor::BeginBuildingScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsContainerFrame* aParentFrame, nsIAtom* aScrolledPseudo, bool aIsRoot, nsContainerFrame*& aNewFrame) { nsContainerFrame* gfxScrollFrame = aNewFrame; nsFrameItems anonymousItems; RefPtr contentStyle = aContentStyle; if (!gfxScrollFrame) { // Build a XULScrollFrame when the child is a box, otherwise an // HTMLScrollFrame // XXXbz this is the lone remaining consumer of IsXULDisplayType. // I wonder whether we can eliminate that somehow. const nsStyleDisplay* displayStyle = aContentStyle->StyleDisplay(); if (IsXULDisplayType(displayStyle)) { gfxScrollFrame = NS_NewXULScrollFrame(mPresShell, contentStyle, aIsRoot, displayStyle->mDisplay == NS_STYLE_DISPLAY_STACK || displayStyle->mDisplay == NS_STYLE_DISPLAY_INLINE_STACK); } else { gfxScrollFrame = NS_NewHTMLScrollFrame(mPresShell, contentStyle, aIsRoot); } InitAndRestoreFrame(aState, aContent, aParentFrame, gfxScrollFrame); } // if there are any anonymous children for the scroll frame, create // frames for them. // Pass a null pending binding: we don't care how constructors for any of // this anonymous content order with anything else. It's never been // consistent anyway. CreateAnonymousFrames(aState, aContent, gfxScrollFrame, nullptr, anonymousItems); aNewFrame = gfxScrollFrame; // we used the style that was passed in. So resolve another one. nsStyleSet *styleSet = mPresShell->StyleSet(); RefPtr scrolledChildStyle = styleSet->ResolveAnonymousBoxStyle(aScrolledPseudo, contentStyle); if (gfxScrollFrame) { gfxScrollFrame->SetInitialChildList(kPrincipalList, anonymousItems); } return scrolledChildStyle.forget(); } void nsCSSFrameConstructor::FinishBuildingScrollFrame(nsContainerFrame* aScrollFrame, nsIFrame* aScrolledFrame) { nsFrameList scrolled(aScrolledFrame, aScrolledFrame); aScrollFrame->AppendFrames(kPrincipalList, scrolled); } /** * Called to wrap a gfx scrollframe around a frame. The hierarchy will look like this * * ------- for gfx scrollbars ------ * * * ScrollFrame * ^ * | * Frame (scrolled frame you passed in) * * *----------------------------------- * LEGEND: * * ScrollFrame: This is a frame that manages gfx cross platform frame based scrollbars. * * @param aContent the content node of the child to wrap. * @param aScrolledFrame The frame of the content to wrap. This should not be * Initialized. This method will initialize it with a scrolled pseudo * and no nsIContent. The content will be attached to the scrollframe * returned. * @param aContentStyle the style context that has already been resolved for the content being passed in. * * @param aParentFrame The parent to attach the scroll frame to * * @param aNewFrame The new scrollframe or gfx scrollframe that we create. It will contain the * scrolled frame you passed in. (returned) * If this is not null, we'll just use it * @param aScrolledContentStyle the style that was resolved for the scrolled frame. (returned) */ void nsCSSFrameConstructor::BuildScrollFrame(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aContentStyle, nsIFrame* aScrolledFrame, nsContainerFrame* aParentFrame, nsContainerFrame*& aNewFrame) { RefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, aContent, aContentStyle, aParentFrame, nsCSSAnonBoxes::scrolledContent, false, aNewFrame); aScrolledFrame->SetStyleContextWithoutNotification(scrolledContentStyle); InitAndRestoreFrame(aState, aContent, aNewFrame, aScrolledFrame); FinishBuildingScrollFrame(aNewFrame, aScrolledFrame); } const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindDisplayData(const nsStyleDisplay* aDisplay, Element* aElement, nsIFrame* aParentFrame, nsStyleContext* aStyleContext) { PR_STATIC_ASSERT(eParentTypeCount < (1 << (32 - FCDATA_PARENT_TYPE_OFFSET))); // The style system ensures that floated and positioned frames are // block-level. NS_ASSERTION(!(aDisplay->IsFloatingStyle() || aDisplay->IsAbsolutelyPositionedStyle()) || aDisplay->IsBlockOutsideStyle() || aDisplay->mDisplay == NS_STYLE_DISPLAY_CONTENTS, "Style system did not apply CSS2.1 section 9.7 fixups"); // If this is "body", try propagating its scroll style to the viewport // Note that we need to do this even if the body is NOT scrollable; // it might have dynamically changed from scrollable to not scrollable, // and that might need to be propagated. // XXXbz is this the right place to do this? If this code moves, // make this function static. bool propagatedScrollToViewport = false; if (aElement->IsHTMLElement(nsGkAtoms::body)) { if (nsPresContext* presContext = mPresShell->GetPresContext()) { propagatedScrollToViewport = presContext->UpdateViewportScrollbarStylesOverride() == aElement; } } NS_ASSERTION(!propagatedScrollToViewport || !mPresShell->GetPresContext()->IsPaginated(), "Shouldn't propagate scroll in paginated contexts"); if (aDisplay->IsBlockInsideStyle()) { // If the frame is a block-level frame and is scrollable, then wrap it in a // scroll frame. Except we don't want to do that for paginated contexts for // frames that are block-outside and aren't frames for native anonymous stuff. // XXX Ignore tables for the time being (except caption) const uint32_t kCaptionCtorFlags = FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable); bool caption = aDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CAPTION; bool suppressScrollFrame = false; bool needScrollFrame = aDisplay->IsScrollableOverflow() && !propagatedScrollToViewport; if (needScrollFrame) { suppressScrollFrame = mPresShell->GetPresContext()->IsPaginated() && aDisplay->IsBlockOutsideStyle() && !aElement->IsInNativeAnonymousSubtree(); if (!suppressScrollFrame) { static const FrameConstructionData sScrollableBlockData[2] = { FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructScrollableBlock), FULL_CTOR_FCDATA(kCaptionCtorFlags, &nsCSSFrameConstructor::ConstructScrollableBlock) }; return &sScrollableBlockData[caption]; } } // Handle various non-scrollable blocks. static const FrameConstructionData sNonScrollableBlockData[2][2] = { { FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructNonScrollableBlock), FULL_CTOR_FCDATA(kCaptionCtorFlags, &nsCSSFrameConstructor::ConstructNonScrollableBlock) }, { FULL_CTOR_FCDATA(FCDATA_FORCED_NON_SCROLLABLE_BLOCK, &nsCSSFrameConstructor::ConstructNonScrollableBlock), FULL_CTOR_FCDATA(FCDATA_FORCED_NON_SCROLLABLE_BLOCK | kCaptionCtorFlags, &nsCSSFrameConstructor::ConstructNonScrollableBlock) } }; return &sNonScrollableBlockData[suppressScrollFrame][caption]; } // If this is for a node and we've propagated the scroll-frame to the // viewport, we need to make sure not to add another layer of scrollbars, so // we use a different FCData struct without FCDATA_MAY_NEED_SCROLLFRAME. if (propagatedScrollToViewport && aDisplay->IsScrollableOverflow()) { if (aDisplay->mDisplay == NS_STYLE_DISPLAY_FLEX) { static const FrameConstructionData sNonScrollableFlexData = FCDATA_DECL(0, NS_NewFlexContainerFrame); return &sNonScrollableFlexData; } if (aDisplay->mDisplay == NS_STYLE_DISPLAY_GRID) { static const FrameConstructionData sNonScrollableGridData = FCDATA_DECL(0, NS_NewGridContainerFrame); return &sNonScrollableGridData; } } static const FrameConstructionDataByInt sDisplayData[] = { // To keep the hash table small don't add inline frames (they're // typically things like FONT and B), because we can quickly // find them if we need to. // XXXbz the "quickly" part is a bald-faced lie! { NS_STYLE_DISPLAY_INLINE, FULL_CTOR_FCDATA(FCDATA_IS_INLINE | FCDATA_IS_LINE_PARTICIPANT, &nsCSSFrameConstructor::ConstructInline) }, { NS_STYLE_DISPLAY_FLEX, FCDATA_DECL(FCDATA_MAY_NEED_SCROLLFRAME, NS_NewFlexContainerFrame) }, { NS_STYLE_DISPLAY_INLINE_FLEX, FCDATA_DECL(FCDATA_MAY_NEED_SCROLLFRAME, NS_NewFlexContainerFrame) }, { NS_STYLE_DISPLAY_GRID, FCDATA_DECL(FCDATA_MAY_NEED_SCROLLFRAME, NS_NewGridContainerFrame) }, { NS_STYLE_DISPLAY_INLINE_GRID, FCDATA_DECL(FCDATA_MAY_NEED_SCROLLFRAME, NS_NewGridContainerFrame) }, { NS_STYLE_DISPLAY_RUBY, FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT, NS_NewRubyFrame) }, { NS_STYLE_DISPLAY_RUBY_BASE, FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRubyBaseContainer), NS_NewRubyBaseFrame) }, { NS_STYLE_DISPLAY_RUBY_BASE_CONTAINER, FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRuby), NS_NewRubyBaseContainerFrame) }, { NS_STYLE_DISPLAY_RUBY_TEXT, FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRubyTextContainer), NS_NewRubyTextFrame) }, { NS_STYLE_DISPLAY_RUBY_TEXT_CONTAINER, FCDATA_DECL(FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRuby), NS_NewRubyTextContainerFrame) }, { NS_STYLE_DISPLAY_TABLE, FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructTable) }, { NS_STYLE_DISPLAY_INLINE_TABLE, FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructTable) }, // NOTE: In the unlikely event that we add another table-part here that has // a desired-parent-type (& hence triggers table fixup), we'll need to also // update the flexbox chunk in nsStyleContext::ApplyStyleFixups(). { NS_STYLE_DISPLAY_TABLE_ROW_GROUP, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup) }, { NS_STYLE_DISPLAY_TABLE_HEADER_GROUP, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup) }, { NS_STYLE_DISPLAY_TABLE_FOOTER_GROUP, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup) }, { NS_STYLE_DISPLAY_TABLE_COLUMN_GROUP, FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableColGroupFrame) }, { NS_STYLE_DISPLAY_TABLE_COLUMN, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeColGroup), &nsCSSFrameConstructor::ConstructTableCol) }, { NS_STYLE_DISPLAY_TABLE_ROW, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRowGroup), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup) }, { NS_STYLE_DISPLAY_TABLE_CELL, FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRow), &nsCSSFrameConstructor::ConstructTableCell) }, { NS_STYLE_DISPLAY_CONTENTS, FULL_CTOR_FCDATA(FCDATA_IS_CONTENTS, nullptr/*never called*/) } }; // See the mDisplay fixup code in nsRuleNode::ComputeDisplayData. MOZ_ASSERT(aDisplay->mDisplay != NS_STYLE_DISPLAY_CONTENTS || !aElement->IsRootOfNativeAnonymousSubtree(), "display:contents on anonymous content is unsupported"); return FindDataByInt(aDisplay->mDisplay, aElement, aStyleContext, sDisplayData, ArrayLength(sDisplayData)); } nsIFrame* nsCSSFrameConstructor::ConstructScrollableBlock(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; nsContainerFrame* newFrame = nullptr; RefPtr scrolledContentStyle = BeginBuildingScrollFrame(aState, content, styleContext, aState.GetGeometricParent(aDisplay, aParentFrame), nsCSSAnonBoxes::scrolledContent, false, newFrame); // Create our block frame // pass a temporary stylecontext, the correct one will be set later nsContainerFrame* scrolledFrame = NS_NewBlockFormattingContext(mPresShell, styleContext); // Make sure to AddChild before we call ConstructBlock so that we // end up before our descendants in fixed-pos lists as needed. aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); nsFrameItems blockItem; ConstructBlock(aState, scrolledContentStyle->StyleDisplay(), content, newFrame, newFrame, scrolledContentStyle, &scrolledFrame, blockItem, aDisplay->IsAbsPosContainingBlock(newFrame) ? newFrame : nullptr, aItem.mPendingBinding); NS_ASSERTION(blockItem.FirstChild() == scrolledFrame, "Scrollframe's frameItems should be exactly the scrolled frame"); FinishBuildingScrollFrame(newFrame, scrolledFrame); return newFrame; } nsIFrame* nsCSSFrameConstructor::ConstructNonScrollableBlock(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { nsStyleContext* const styleContext = aItem.mStyleContext; // We want a block formatting context root in paginated contexts for // every block that would be scrollable in a non-paginated context. // We mark our blocks with a bit here if this condition is true, so // we can check it later in nsFrame::ApplyPaginatedOverflowClipping. bool clipPaginatedOverflow = (aItem.mFCData->mBits & FCDATA_FORCED_NON_SCROLLABLE_BLOCK) != 0; nsContainerFrame* newFrame; if ((aDisplay->IsAbsolutelyPositionedStyle() || aDisplay->IsFloatingStyle() || NS_STYLE_DISPLAY_INLINE_BLOCK == aDisplay->mDisplay || clipPaginatedOverflow) && !aParentFrame->IsSVGText()) { newFrame = NS_NewBlockFormattingContext(mPresShell, styleContext); if (clipPaginatedOverflow) { newFrame->AddStateBits(NS_BLOCK_CLIP_PAGINATED_OVERFLOW); } } else { newFrame = NS_NewBlockFrame(mPresShell, styleContext); } ConstructBlock(aState, aDisplay, aItem.mContent, aState.GetGeometricParent(aDisplay, aParentFrame), aParentFrame, styleContext, &newFrame, aFrameItems, aDisplay->IsAbsPosContainingBlock(newFrame) ? newFrame : nullptr, aItem.mPendingBinding); return newFrame; } void nsCSSFrameConstructor::InitAndRestoreFrame(const nsFrameConstructorState& aState, nsIContent* aContent, nsContainerFrame* aParentFrame, nsIFrame* aNewFrame, bool aAllowCounters) { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); MOZ_ASSERT(aNewFrame, "Null frame cannot be initialized"); // Initialize the frame aNewFrame->Init(aContent, aParentFrame, nullptr); aNewFrame->AddStateBits(aState.mAdditionalStateBits); if (aState.mFrameState) { // Restore frame state for just the newly created frame. RestoreFrameStateFor(aNewFrame, aState.mFrameState); } if (aAllowCounters && mCounterManager.AddCounterResetsAndIncrements(aNewFrame)) { CountersDirty(); } } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsIFrame* aParentFrame, nsIContent* aContainer, nsIContent* aChild, nsFrameConstructorState* aState) { MOZ_ASSERT(aContainer, "Must have parent here"); // XXX uncomment when bug 1089223 is fixed: // MOZ_ASSERT(aContainer == aChild->GetFlattenedTreeParent()); nsStyleContext* parentStyleContext = GetDisplayContentsStyleFor(aContainer); if (MOZ_LIKELY(!parentStyleContext)) { aParentFrame = nsFrame::CorrectStyleParentFrame(aParentFrame, nullptr); if (aParentFrame) { MOZ_ASSERT(aParentFrame->GetContent() == aContainer); // Resolve the style context based on the content object and the parent // style context parentStyleContext = aParentFrame->StyleContext(); } else { // Perhaps aParentFrame is a canvasFrame and we're replicating // fixed-pos frames. // XXX should we create a way to tell ConstructFrame which style // context to use, and pass it the style context for the // previous page's fixed-pos frame? } } return ResolveStyleContext(parentStyleContext, aChild, aState); } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsIFrame* aParentFrame, nsIContent* aChild, nsFrameConstructorState* aState) { return ResolveStyleContext(aParentFrame, aChild->GetFlattenedTreeParent(), aChild, aState); } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(const InsertionPoint& aInsertion, nsIContent* aChild, nsFrameConstructorState* aState) { return ResolveStyleContext(aInsertion.mParentFrame, aInsertion.mContainer, aChild, aState); } already_AddRefed nsCSSFrameConstructor::ResolveStyleContext(nsStyleContext* aParentStyleContext, nsIContent* aContent, nsFrameConstructorState* aState) { nsStyleSet *styleSet = mPresShell->StyleSet(); aContent->OwnerDoc()->FlushPendingLinkUpdates(); RefPtr result; if (aContent->IsElement()) { if (aState) { result = styleSet->ResolveStyleFor(aContent->AsElement(), aParentStyleContext, aState->mTreeMatchContext); } else { result = styleSet->ResolveStyleFor(aContent->AsElement(), aParentStyleContext); } } else { NS_ASSERTION(aContent->IsNodeOfType(nsINode::eTEXT), "shouldn't waste time creating style contexts for " "comments and processing instructions"); result = styleSet->ResolveStyleForNonElement(aParentStyleContext); } RestyleManager::ReframingStyleContexts* rsc = RestyleManager()->GetReframingStyleContexts(); if (rsc) { nsStyleContext* oldStyleContext = rsc->Get(aContent, nsCSSPseudoElements::ePseudo_NotPseudoElement); nsPresContext* presContext = mPresShell->GetPresContext(); if (oldStyleContext) { RestyleManager::TryStartingTransition(presContext, aContent, oldStyleContext, &result); } else if (aContent->IsElement()) { presContext->TransitionManager()-> PruneCompletedTransitions(aContent->AsElement(), nsCSSPseudoElements::ePseudo_NotPseudoElement, result); } } return result.forget(); } // MathML Mod - RBS void nsCSSFrameConstructor::FlushAccumulatedBlock(nsFrameConstructorState& aState, nsIContent* aContent, nsContainerFrame* aParentFrame, nsFrameItems& aBlockItems, nsFrameItems& aNewItems) { if (aBlockItems.IsEmpty()) { // Nothing to do return; } nsIAtom* anonPseudo = nsCSSAnonBoxes::mozMathMLAnonymousBlock; nsStyleContext* parentContext = nsFrame::CorrectStyleParentFrame(aParentFrame, anonPseudo)->StyleContext(); nsStyleSet* styleSet = mPresShell->StyleSet(); RefPtr blockContext; blockContext = styleSet-> ResolveAnonymousBoxStyle(anonPseudo, parentContext); // then, create a block frame that will wrap the child frames. Make it a // MathML frame so that Get(Absolute/Float)ContainingBlockFor know that this // is not a suitable block. nsContainerFrame* blockFrame = NS_NewMathMLmathBlockFrame(mPresShell, blockContext, NS_BLOCK_FLOAT_MGR | NS_BLOCK_MARGIN_ROOT); InitAndRestoreFrame(aState, aContent, aParentFrame, blockFrame); ReparentFrames(this, blockFrame, aBlockItems); // abs-pos and floats are disabled in MathML children so we don't have to // worry about messing up those. blockFrame->SetInitialChildList(kPrincipalList, aBlockItems); NS_ASSERTION(aBlockItems.IsEmpty(), "What happened?"); aBlockItems.Clear(); aNewItems.AddChild(blockFrame); } // Only elements can be floated or positioned. All other MathML // should be in-flow. #define SIMPLE_MATHML_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | \ FCDATA_FORCE_NULL_ABSPOS_CONTAINER | \ FCDATA_WRAP_KIDS_IN_BLOCKS, _func) } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindMathMLData(Element* aElement, nsIAtom* aTag, int32_t aNameSpaceID, nsStyleContext* aStyleContext) { // Make sure that we remain confined in the MathML world if (aNameSpaceID != kNameSpaceID_MathML) return nullptr; // Handle specially, because it sometimes produces inlines if (aTag == nsGkAtoms::math) { // This needs to match the test in EnsureBlockDisplay in // nsRuleNode.cpp. Though the behavior here for the display:table // case is pretty weird... if (aStyleContext->StyleDisplay()->IsBlockOutsideStyle()) { static const FrameConstructionData sBlockMathData = FCDATA_DECL(FCDATA_FORCE_NULL_ABSPOS_CONTAINER | FCDATA_WRAP_KIDS_IN_BLOCKS, NS_CreateNewMathMLmathBlockFrame); return &sBlockMathData; } static const FrameConstructionData sInlineMathData = FCDATA_DECL(FCDATA_FORCE_NULL_ABSPOS_CONTAINER | FCDATA_IS_LINE_PARTICIPANT | FCDATA_WRAP_KIDS_IN_BLOCKS, NS_NewMathMLmathInlineFrame); return &sInlineMathData; } static const FrameConstructionDataByTag sMathMLData[] = { SIMPLE_MATHML_CREATE(annotation_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(annotation_xml_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(mi_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mn_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(ms_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mtext_, NS_NewMathMLTokenFrame), SIMPLE_MATHML_CREATE(mo_, NS_NewMathMLmoFrame), SIMPLE_MATHML_CREATE(mfrac_, NS_NewMathMLmfracFrame), SIMPLE_MATHML_CREATE(msup_, NS_NewMathMLmmultiscriptsFrame), SIMPLE_MATHML_CREATE(msub_, NS_NewMathMLmmultiscriptsFrame), SIMPLE_MATHML_CREATE(msubsup_, NS_NewMathMLmmultiscriptsFrame), SIMPLE_MATHML_CREATE(munder_, NS_NewMathMLmunderoverFrame), SIMPLE_MATHML_CREATE(mover_, NS_NewMathMLmunderoverFrame), SIMPLE_MATHML_CREATE(munderover_, NS_NewMathMLmunderoverFrame), SIMPLE_MATHML_CREATE(mphantom_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(mpadded_, NS_NewMathMLmpaddedFrame), SIMPLE_MATHML_CREATE(mspace_, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(none, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(mprescripts_, NS_NewMathMLmspaceFrame), SIMPLE_MATHML_CREATE(mfenced_, NS_NewMathMLmfencedFrame), SIMPLE_MATHML_CREATE(mmultiscripts_, NS_NewMathMLmmultiscriptsFrame), SIMPLE_MATHML_CREATE(mstyle_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(msqrt_, NS_NewMathMLmsqrtFrame), SIMPLE_MATHML_CREATE(mroot_, NS_NewMathMLmrootFrame), SIMPLE_MATHML_CREATE(maction_, NS_NewMathMLmactionFrame), SIMPLE_MATHML_CREATE(mrow_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(merror_, NS_NewMathMLmrowFrame), SIMPLE_MATHML_CREATE(menclose_, NS_NewMathMLmencloseFrame), SIMPLE_MATHML_CREATE(semantics_, NS_NewMathMLsemanticsFrame) }; return FindDataByTag(aTag, aElement, aStyleContext, sMathMLData, ArrayLength(sMathMLData)); } nsContainerFrame* nsCSSFrameConstructor::ConstructFrameWithAnonymousChild( nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems, ContainerFrameCreationFunc aConstructor, ContainerFrameCreationFunc aInnerConstructor, nsICSSAnonBoxPseudo* aInnerPseudo, bool aCandidateRootFrame) { nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; // Create the outer frame: nsContainerFrame* newFrame = aConstructor(mPresShell, styleContext); InitAndRestoreFrame(aState, content, aCandidateRootFrame ? aState.GetGeometricParent(styleContext->StyleDisplay(), aParentFrame) : aParentFrame, newFrame); // Create the pseudo SC for the anonymous wrapper child as a child of the SC: RefPtr scForAnon; scForAnon = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(aInnerPseudo, styleContext); // Create the anonymous inner wrapper frame nsContainerFrame* innerFrame = aInnerConstructor(mPresShell, scForAnon); InitAndRestoreFrame(aState, content, newFrame, innerFrame); // Put the newly created frames into the right child list SetInitialSingleChild(newFrame, innerFrame); aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame, aCandidateRootFrame, aCandidateRootFrame); if (!mRootElementFrame && aCandidateRootFrame) { // The frame we're constructing will be the root element frame. // Set mRootElementFrame before processing children. mRootElementFrame = newFrame; } nsFrameItems childItems; // Process children NS_ASSERTION(aItem.mAnonChildren.IsEmpty(), "nsIAnonymousContentCreator::CreateAnonymousContent should not " "be implemented for frames for which we explicitly create an " "anonymous child to wrap its child frames"); if (aItem.mFCData->mBits & FCDATA_USE_CHILD_ITEMS) { ConstructFramesFromItemList(aState, aItem.mChildItems, innerFrame, childItems); } else { ProcessChildren(aState, content, styleContext, innerFrame, true, childItems, false, aItem.mPendingBinding); } // Set the inner wrapper frame's initial primary list innerFrame->SetInitialChildList(kPrincipalList, childItems); return newFrame; } nsIFrame* nsCSSFrameConstructor::ConstructOuterSVG(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { return ConstructFrameWithAnonymousChild( aState, aItem, aParentFrame, aDisplay, aFrameItems, NS_NewSVGOuterSVGFrame, NS_NewSVGOuterSVGAnonChildFrame, nsCSSAnonBoxes::mozSVGOuterSVGAnonChild, true); } nsIFrame* nsCSSFrameConstructor::ConstructMarker(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { return ConstructFrameWithAnonymousChild( aState, aItem, aParentFrame, aDisplay, aFrameItems, NS_NewSVGMarkerFrame, NS_NewSVGMarkerAnonChildFrame, nsCSSAnonBoxes::mozSVGMarkerAnonChild, false); } // Only outer elements can be floated or positioned. All other SVG // should be in-flow. #define SIMPLE_SVG_FCDATA(_func) \ FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | \ FCDATA_SKIP_ABSPOS_PUSH | \ FCDATA_DISALLOW_GENERATED_CONTENT, _func) #define SIMPLE_SVG_CREATE(_tag, _func) \ { &nsGkAtoms::_tag, SIMPLE_SVG_FCDATA(_func) } static bool IsFilterPrimitiveChildTag(const nsIAtom* aTag) { return aTag == nsGkAtoms::feDistantLight || aTag == nsGkAtoms::fePointLight || aTag == nsGkAtoms::feSpotLight || aTag == nsGkAtoms::feFuncR || aTag == nsGkAtoms::feFuncG || aTag == nsGkAtoms::feFuncB || aTag == nsGkAtoms::feFuncA || aTag == nsGkAtoms::feMergeNode; } /* static */ const nsCSSFrameConstructor::FrameConstructionData* nsCSSFrameConstructor::FindSVGData(Element* aElement, nsIAtom* aTag, int32_t aNameSpaceID, nsIFrame* aParentFrame, bool aIsWithinSVGText, bool aAllowsTextPathChild, nsStyleContext* aStyleContext) { if (aNameSpaceID != kNameSpaceID_SVG) { return nullptr; } static const FrameConstructionData sSuppressData = SUPPRESS_FCDATA(); static const FrameConstructionData sContainerData = SIMPLE_SVG_FCDATA(NS_NewSVGContainerFrame); bool parentIsSVG = aIsWithinSVGText; nsIContent* parentContent = aParentFrame ? aParentFrame->GetContent() : nullptr; // XXXbz should this really be based on the XBL-resolved tag of the parent // frame's content? Should it not be based on the type of the parent frame // (e.g. whether it's an SVG frame)? if (parentContent) { int32_t parentNSID; nsIAtom* parentTag = parentContent->OwnerDoc()->BindingManager()-> ResolveTag(parentContent, &parentNSID); // It's not clear whether the SVG spec intends to allow any SVG // content within svg:foreignObject at all (SVG 1.1, section // 23.2), but if it does, it better be svg:svg. So given that // we're allowing it, treat it as a non-SVG parent. parentIsSVG = parentNSID == kNameSpaceID_SVG && parentTag != nsGkAtoms::foreignObject; } if ((aTag != nsGkAtoms::svg && !parentIsSVG) || (aTag == nsGkAtoms::desc || aTag == nsGkAtoms::title || aTag == nsGkAtoms::metadata)) { // Sections 5.1 and G.4 of SVG 1.1 say that SVG elements other than // svg:svg not contained within svg:svg are incorrect, although they // don't seem to specify error handling. Ignore them, since many of // our frame classes can't deal. It *may* be that the document // should at that point be considered in error according to F.2, but // it's hard to tell. // // Style mutation can't change this situation, so don't bother // adding to the undisplayed content map. // // We don't currently handle any UI for desc/title/metadata return &sSuppressData; } // We don't need frames for animation elements if (aElement->IsNodeOfType(nsINode::eANIMATION)) { return &sSuppressData; } if (aTag == nsGkAtoms::svg && !parentIsSVG) { // We need outer elements to have an nsSVGOuterSVGFrame regardless // of whether they fail conditional processing attributes, since various // SVG frames assume that one exists. We handle the non-rendering // of failing outer element contents like statements, // and do the PassesConditionalProcessingTests call in // nsSVGOuterSVGFrame::Init. static const FrameConstructionData sOuterSVGData = FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructOuterSVG); return &sOuterSVGData; } if (aTag == nsGkAtoms::marker) { static const FrameConstructionData sMarkerSVGData = FULL_CTOR_FCDATA(0, &nsCSSFrameConstructor::ConstructMarker); return &sMarkerSVGData; } nsCOMPtr tests(do_QueryInterface(aElement)); if (tests && !tests->PassesConditionalProcessingTests()) { // Elements with failing conditional processing attributes never get // rendered. Note that this is not where we select which frame in a // to render! That happens in nsSVGSwitchFrame::PaintSVG. if (aIsWithinSVGText) { // SVGTextFrame doesn't handle conditional processing attributes, // so don't create frames for descendants of with failing // attributes. We need frames not to be created so that text layout // is correct. return &sSuppressData; } // If we're not inside , create an nsSVGContainerFrame (which is a // frame that doesn't render) so that paint servers can still be referenced, // even if they live inside an element with failing conditional processing // attributes. return &sContainerData; } // Ensure that a stop frame is a child of a gradient and that gradients // can only have stop children. bool parentIsGradient = aParentFrame && (aParentFrame->GetType() == nsGkAtoms::svgLinearGradientFrame || aParentFrame->GetType() == nsGkAtoms::svgRadialGradientFrame); bool stop = (aTag == nsGkAtoms::stop); if ((parentIsGradient && !stop) || (!parentIsGradient && stop)) { return &sSuppressData; } // Prevent bad frame types being children of filters or parents of filter // primitives. If aParentFrame is null, we know that the frame that will // be created will be an nsInlineFrame, so it can never be a filter. bool parentIsFilter = aParentFrame && aParentFrame->GetType() == nsGkAtoms::svgFilterFrame; bool filterPrimitive = aElement->IsNodeOfType(nsINode::eFILTER); if ((parentIsFilter && !filterPrimitive) || (!parentIsFilter && filterPrimitive)) { return &sSuppressData; } // Prevent bad frame types being children of filter primitives or parents of // filter primitive children. If aParentFrame is null, we know that the frame // that will be created will be an nsInlineFrame, so it can never be a filter // primitive. bool parentIsFEContainerFrame = aParentFrame && aParentFrame->GetType() == nsGkAtoms::svgFEContainerFrame; if ((parentIsFEContainerFrame && !IsFilterPrimitiveChildTag(aTag)) || (!parentIsFEContainerFrame && IsFilterPrimitiveChildTag(aTag))) { return &sSuppressData; } // Special cases for text/tspan/textPath, because the kind of frame // they get depends on the parent frame. We ignore 'a' elements when // determining the parent, however. if (aIsWithinSVGText) { // If aIsWithinSVGText is true, then we know that the "SVG text uses // CSS frames" pref was true when this SVG fragment was first constructed. // We don't use ConstructInline because we want different behavior // for generated content. static const FrameConstructionData sTSpanData = FCDATA_DECL(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_SKIP_ABSPOS_PUSH | FCDATA_DISALLOW_GENERATED_CONTENT | FCDATA_IS_LINE_PARTICIPANT | FCDATA_IS_INLINE | FCDATA_USE_CHILD_ITEMS, NS_NewInlineFrame); if (aTag == nsGkAtoms::textPath) { if (aAllowsTextPathChild) { return &sTSpanData; } } else if (aTag == nsGkAtoms::tspan || aTag == nsGkAtoms::altGlyph || aTag == nsGkAtoms::a) { return &sTSpanData; } return &sSuppressData; } else if (aTag == nsGkAtoms::text) { static const FrameConstructionData sTextData = FCDATA_WITH_WRAPPING_BLOCK(FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_ALLOW_BLOCK_STYLES, NS_NewSVGTextFrame, nsCSSAnonBoxes::mozSVGText); return &sTextData; } else if (aTag == nsGkAtoms::tspan || aTag == nsGkAtoms::altGlyph || aTag == nsGkAtoms::textPath) { return &sSuppressData; } static const FrameConstructionDataByTag sSVGData[] = { SIMPLE_SVG_CREATE(svg, NS_NewSVGInnerSVGFrame), SIMPLE_SVG_CREATE(g, NS_NewSVGGFrame), SIMPLE_SVG_CREATE(svgSwitch, NS_NewSVGSwitchFrame), SIMPLE_SVG_CREATE(polygon, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(polyline, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(circle, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(ellipse, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(line, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(rect, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(path, NS_NewSVGPathGeometryFrame), SIMPLE_SVG_CREATE(defs, NS_NewSVGContainerFrame), SIMPLE_SVG_CREATE(generic_, NS_NewSVGGenericContainerFrame), { &nsGkAtoms::foreignObject, FCDATA_WITH_WRAPPING_BLOCK(FCDATA_DISALLOW_OUT_OF_FLOW, NS_NewSVGForeignObjectFrame, nsCSSAnonBoxes::mozSVGForeignContent) }, SIMPLE_SVG_CREATE(a, NS_NewSVGAFrame), SIMPLE_SVG_CREATE(linearGradient, NS_NewSVGLinearGradientFrame), SIMPLE_SVG_CREATE(radialGradient, NS_NewSVGRadialGradientFrame), SIMPLE_SVG_CREATE(stop, NS_NewSVGStopFrame), SIMPLE_SVG_CREATE(use, NS_NewSVGUseFrame), SIMPLE_SVG_CREATE(view, NS_NewSVGViewFrame), SIMPLE_SVG_CREATE(image, NS_NewSVGImageFrame), SIMPLE_SVG_CREATE(clipPath, NS_NewSVGClipPathFrame), SIMPLE_SVG_CREATE(filter, NS_NewSVGFilterFrame), SIMPLE_SVG_CREATE(pattern, NS_NewSVGPatternFrame), SIMPLE_SVG_CREATE(mask, NS_NewSVGMaskFrame), SIMPLE_SVG_CREATE(feDistantLight, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(fePointLight, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feSpotLight, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feBlend, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feColorMatrix, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feFuncR, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feFuncG, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feFuncB, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feFuncA, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feComposite, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feComponentTransfer, NS_NewSVGFEContainerFrame), SIMPLE_SVG_CREATE(feConvolveMatrix, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feDiffuseLighting, NS_NewSVGFEContainerFrame), SIMPLE_SVG_CREATE(feDisplacementMap, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feDropShadow, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feFlood, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feGaussianBlur, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feImage, NS_NewSVGFEImageFrame), SIMPLE_SVG_CREATE(feMerge, NS_NewSVGFEContainerFrame), SIMPLE_SVG_CREATE(feMergeNode, NS_NewSVGFEUnstyledLeafFrame), SIMPLE_SVG_CREATE(feMorphology, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feOffset, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feSpecularLighting, NS_NewSVGFEContainerFrame), SIMPLE_SVG_CREATE(feTile, NS_NewSVGFELeafFrame), SIMPLE_SVG_CREATE(feTurbulence, NS_NewSVGFELeafFrame) }; const FrameConstructionData* data = FindDataByTag(aTag, aElement, aStyleContext, sSVGData, ArrayLength(sSVGData)); if (!data) { data = &sContainerData; } return data; } void nsCSSFrameConstructor::AddPageBreakItem(nsIContent* aContent, nsStyleContext* aMainStyleContext, FrameConstructionItemList& aItems) { // Use the same parent style context that |aMainStyleContext| has, since // that's easier to re-resolve and it doesn't matter in practice. // (Getting different parents can result in framechange hints, e.g., // for user-modify.) RefPtr pseudoStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::pageBreak, aMainStyleContext->GetParent()); NS_ASSERTION(pseudoStyle->StyleDisplay()->mDisplay == NS_STYLE_DISPLAY_BLOCK, "Unexpected display"); static const FrameConstructionData sPageBreakData = FCDATA_DECL(FCDATA_SKIP_FRAMESET, NS_NewPageBreakFrame); // Lie about the tag and namespace so we don't trigger anything // interesting during frame construction. aItems.AppendItem(&sPageBreakData, aContent, nsCSSAnonBoxes::pageBreak, kNameSpaceID_None, nullptr, pseudoStyle.forget(), true, nullptr); } bool nsCSSFrameConstructor::ShouldCreateItemsForChild(nsFrameConstructorState& aState, nsIContent* aContent, nsContainerFrame* aParentFrame) { aContent->UnsetFlags(NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME); if (aContent->IsElement()) { // We can't just remove our pending restyle flags, since we may // have restyle-later-siblings set on us. But we _can_ remove the // "is possible restyle root" flags, and need to. Otherwise we can // end up with stale such flags (e.g. if we used to have a // display:none parent when our last restyle was posted and // processed and now no longer do). aContent->UnsetFlags(ELEMENT_ALL_RESTYLE_FLAGS & ~ELEMENT_PENDING_RESTYLE_FLAGS); } // XXX the GetContent() != aContent check is needed due to bug 135040. // Remove it once that's fixed. if (aContent->GetPrimaryFrame() && aContent->GetPrimaryFrame()->GetContent() == aContent && !aState.mCreatingExtraFrames) { NS_ERROR("asked to create frame construction item for a node that already " "has a frame"); return false; } // don't create a whitespace frame if aParent doesn't want it if (!NeedFrameFor(aState, aParentFrame, aContent)) { return false; } // never create frames for comments or PIs if (aContent->IsNodeOfType(nsINode::eCOMMENT) || aContent->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) { return false; } return true; } void nsCSSFrameConstructor::DoAddFrameConstructionItems(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aStyleContext, bool aSuppressWhiteSpaceOptimizations, nsContainerFrame* aParentFrame, nsTArray* aAnonChildren, FrameConstructionItemList& aItems) { uint32_t flags = ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK; if (aParentFrame) { if (aParentFrame->IsSVGText()) { flags |= ITEM_IS_WITHIN_SVG_TEXT; } if (aParentFrame->GetType() == nsGkAtoms::blockFrame && aParentFrame->GetParent() && aParentFrame->GetParent()->GetType() == nsGkAtoms::svgTextFrame) { flags |= ITEM_ALLOWS_TEXT_PATH_CHILD; } } AddFrameConstructionItemsInternal(aState, aContent, aParentFrame, aContent->NodeInfo()->NameAtom(), aContent->GetNameSpaceID(), aSuppressWhiteSpaceOptimizations, aStyleContext, flags, aAnonChildren, aItems); } void nsCSSFrameConstructor::AddFrameConstructionItems(nsFrameConstructorState& aState, nsIContent* aContent, bool aSuppressWhiteSpaceOptimizations, const InsertionPoint& aInsertion, FrameConstructionItemList& aItems) { nsContainerFrame* parentFrame = aInsertion.mParentFrame; if (!ShouldCreateItemsForChild(aState, aContent, parentFrame)) { return; } RefPtr styleContext = ResolveStyleContext(aInsertion, aContent, &aState); DoAddFrameConstructionItems(aState, aContent, styleContext, aSuppressWhiteSpaceOptimizations, parentFrame, nullptr, aItems); } void nsCSSFrameConstructor::SetAsUndisplayedContent(nsFrameConstructorState& aState, FrameConstructionItemList& aList, nsIContent* aContent, nsStyleContext* aStyleContext, bool aIsGeneratedContent) { if (aStyleContext->GetPseudo()) { if (aIsGeneratedContent) { aContent->UnbindFromTree(); } return; } NS_ASSERTION(!aIsGeneratedContent, "Should have had pseudo type"); if (aState.mCreatingExtraFrames) { MOZ_ASSERT(GetUndisplayedContent(aContent), "should have called SetUndisplayedContent earlier"); return; } aList.AppendUndisplayedItem(aContent, aStyleContext); } void nsCSSFrameConstructor::AddFrameConstructionItemsInternal(nsFrameConstructorState& aState, nsIContent* aContent, nsContainerFrame* aParentFrame, nsIAtom* aTag, int32_t aNameSpaceID, bool aSuppressWhiteSpaceOptimizations, nsStyleContext* aStyleContext, uint32_t aFlags, nsTArray* aAnonChildren, FrameConstructionItemList& aItems) { NS_PRECONDITION(aContent->IsNodeOfType(nsINode::eTEXT) || aContent->IsElement(), "Shouldn't get anything else here!"); MOZ_ASSERT(!aContent->GetPrimaryFrame() || aState.mCreatingExtraFrames || aContent->NodeInfo()->NameAtom() == nsGkAtoms::area); // The following code allows the user to specify the base tag // of an element using XBL. XUL and HTML objects (like boxes, menus, etc.) // can then be extended arbitrarily. const nsStyleDisplay* display = aStyleContext->StyleDisplay(); RefPtr styleContext(aStyleContext); PendingBinding* pendingBinding = nullptr; if ((aFlags & ITEM_ALLOW_XBL_BASE) && display->mBinding) { // Ensure that our XBL bindings are installed. nsXBLService* xblService = nsXBLService::GetInstance(); if (!xblService) return; bool resolveStyle; nsAutoPtr newPendingBinding(new PendingBinding()); nsresult rv = xblService->LoadBindings(aContent, display->mBinding->GetURI(), display->mBinding->mOriginPrincipal, getter_AddRefs(newPendingBinding->mBinding), &resolveStyle); if (NS_FAILED(rv) && rv != NS_ERROR_XBL_BLOCKED) return; if (newPendingBinding->mBinding) { pendingBinding = newPendingBinding; // aState takes over owning newPendingBinding aState.AddPendingBinding(newPendingBinding.forget()); } if (resolveStyle) { styleContext = ResolveStyleContext(styleContext->GetParent(), aContent, &aState); display = styleContext->StyleDisplay(); aStyleContext = styleContext; } aTag = mDocument->BindingManager()->ResolveTag(aContent, &aNameSpaceID); } bool isGeneratedContent = ((aFlags & ITEM_IS_GENERATED_CONTENT) != 0); // Pre-check for display "none" - if we find that, don't create // any frame at all if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { SetAsUndisplayedContent(aState, aItems, aContent, styleContext, isGeneratedContent); return; } bool isText = !aContent->IsElement(); // never create frames for non-option/optgroup kids of
so no need to check it items.SetLineBoundaryAtEnd(!parentAfterFrame || !parentAfterFrame->IsInlineOutside()); } // To suppress whitespace-only text frames, we have to verify that // our container's DOM child list matches its flattened tree child list. items.SetParentHasNoXBLChildren(haveNoXBLChildren); nsFrameItems frameItems; ConstructFramesFromItemList(state, items, parentFrame, frameItems); for (nsIContent* child = aFirstNewContent; child; child = child->GetNextSibling()) { // Invalidate now instead of before the WipeContainingBlock call, just in // case we do wipe; in that case we don't need to do this walk at all. // XXXbz does that matter? Would it make more sense to save some virtual // GetChildAt calls instead and do this during construction of our // FrameConstructionItemList? InvalidateCanvasIfNeeded(mPresShell, child); } // if the container is a table and a caption was appended, it needs to be put // in the outer table frame's additional child list. nsFrameItems captionItems; if (nsGkAtoms::tableFrame == frameType) { // Pull out the captions. Note that we don't want to do that as we go, // because processing a single caption can add a whole bunch of things to // the frame items due to pseudoframe processing. So we'd have to pull // captions from a list anyway; might as well do that here. // XXXbz this is no longer true; we could pull captions directly out of the // FrameConstructionItemList now. PullOutCaptionFrames(frameItems, captionItems); } if (haveFirstLineStyle && parentFrame == containingBlock) { // It's possible that some of the new frames go into a // first-line frame. Look at them and see... AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } // Notify the parent frame passing it the list of new frames // Append the flowed frames to the principal child list; captions // need special treatment if (captionItems.NotEmpty()) { // append the caption to the outer table NS_ASSERTION(nsGkAtoms::tableFrame == frameType, "how did that happen?"); nsContainerFrame* outerTable = parentFrame->GetParent(); AppendFrames(outerTable, nsIFrame::kCaptionList, captionItems); } if (frameItems.NotEmpty()) { // append the in-flow kids AppendFramesToParent(state, parentFrame, frameItems, prevSibling); } // Recover first-letter frames if (haveFirstLetterStyle) { RecoverLetterFrames(containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentAppended: resulting frame model:\n"); parentFrame->List(stdout, 0); } #endif #ifdef ACCESSIBILITY nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { accService->ContentRangeInserted(mPresShell, aContainer, aFirstNewContent, nullptr); } #endif return NS_OK; } #ifdef MOZ_XUL enum content_operation { CONTENT_INSERTED, CONTENT_REMOVED }; // Helper function to lookup the listbox body frame and send a notification // for insertion or removal of content static bool NotifyListBoxBody(nsPresContext* aPresContext, nsIContent* aContainer, nsIContent* aChild, // Only used for the removed notification nsIContent* aOldNextSibling, nsIDocument* aDocument, nsIFrame* aChildFrame, content_operation aOperation) { nsListBoxBodyFrame* listBoxBodyFrame = MaybeGetListBoxBodyFrame(aContainer, aChild); if (listBoxBodyFrame) { if (aOperation == CONTENT_REMOVED) { // Except if we have an aChildFrame and its parent is not the right // thing, then we don't do this. Pseudo frames are so much fun.... if (!aChildFrame || aChildFrame->GetParent() == listBoxBodyFrame) { listBoxBodyFrame->OnContentRemoved(aPresContext, aContainer, aChildFrame, aOldNextSibling); return true; } } else { listBoxBodyFrame->OnContentInserted(aChild); return true; } } return false; } #endif // MOZ_XUL nsresult nsCSSFrameConstructor::ContentInserted(nsIContent* aContainer, nsIContent* aChild, nsILayoutHistoryState* aFrameState, bool aAllowLazyConstruction) { return ContentRangeInserted(aContainer, aChild, aChild->GetNextSibling(), aFrameState, aAllowLazyConstruction); } // ContentRangeInserted handles creating frames for a range of nodes that // aren't at the end of their childlist. ContentRangeInserted isn't a real // content notification, but rather it handles regular ContentInserted calls // for a single node as well as the lazy construction of frames for a range of // nodes when called from CreateNeededFrames. For a range of nodes to be // suitable to have its frames constructed all at once they must meet the same // conditions that ContentAppended imposes (GetRangeInsertionPoint checks // these), plus more. Namely when finding the insertion prevsibling we must not // need to consult something specific to any one node in the range, so that the // insertion prevsibling would be the same for each node in the range. So we // pass the first node in the range to GetInsertionPrevSibling, and if // IsValidSibling (the only place GetInsertionPrevSibling might look at the // passed in node itself) needs to resolve style on the node we record this and // return that this range needs to be split up and inserted separately. Table // captions need extra attention as we need to determine where to insert them // in the caption list, while skipping any nodes in the range being inserted // (because when we treat the caption frames the other nodes have had their // frames constructed but not yet inserted into the frame tree). nsresult nsCSSFrameConstructor::ContentRangeInserted(nsIContent* aContainer, nsIContent* aStartChild, nsIContent* aEndChild, nsILayoutHistoryState* aFrameState, bool aAllowLazyConstruction) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while creating frames"); NS_PRECONDITION(aStartChild, "must always pass a child"); // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRangeInserted container=%p " "start-child=%p end-child=%p lazy=%d\n", static_cast(aContainer), static_cast(aStartChild), static_cast(aEndChild), aAllowLazyConstruction); if (gReallyNoisyContentUpdates) { if (aContainer) { aContainer->List(stdout,0); } else { aStartChild->List(stdout, 0); } } } #endif #ifdef DEBUG for (nsIContent* child = aStartChild; child != aEndChild; child = child->GetNextSibling()) { // XXX the GetContent() != child check is needed due to bug 135040. // Remove it once that's fixed. NS_ASSERTION(!child->GetPrimaryFrame() || child->GetPrimaryFrame()->GetContent() != child, "asked to construct a frame for a node that already has a frame"); } #endif bool isSingleInsert = (aStartChild->GetNextSibling() == aEndChild); NS_ASSERTION(isSingleInsert || !aAllowLazyConstruction, "range insert shouldn't be lazy"); NS_ASSERTION(isSingleInsert || aEndChild, "range should not include all nodes after aStartChild"); #ifdef MOZ_XUL if (aContainer && IsXULListBox(aContainer)) { if (isSingleInsert) { if (NotifyListBoxBody(mPresShell->GetPresContext(), aContainer, // The insert case in NotifyListBoxBody // doesn't use "old next sibling". aStartChild, nullptr, mDocument, nullptr, CONTENT_INSERTED)) { return NS_OK; } } else { // We don't handle a range insert to a listbox parent, issue single // ContertInserted calls for each node inserted. LAYOUT_PHASE_TEMP_EXIT(); IssueSingleInsertNofications(aContainer, aStartChild, aEndChild, aAllowLazyConstruction); LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } } #endif // MOZ_XUL // If we have a null parent, then this must be the document element being // inserted, or some other child of the document in the DOM (might be a PI, // say). if (! aContainer) { NS_ASSERTION(isSingleInsert, "root node insertion should be a single insertion"); Element *docElement = mDocument->GetRootElement(); if (aStartChild != docElement) { // Not the root element; just bail out return NS_OK; } NS_PRECONDITION(nullptr == mRootElementFrame, "root element frame already created"); // Create frames for the document element and its child elements nsIFrame* docElementFrame = ConstructDocElementFrame(docElement, aFrameState); if (docElementFrame) { InvalidateCanvasIfNeeded(mPresShell, aStartChild); #ifdef DEBUG if (gReallyNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRangeInserted: resulting frame " "model:\n"); docElementFrame->List(stdout, 0); } #endif } if (aFrameState) { // Restore frame state for the root scroll frame if there is one nsIFrame* rootScrollFrame = mPresShell->GetRootScrollFrame(); if (rootScrollFrame) { RestoreFrameStateFor(rootScrollFrame, aFrameState); } } #ifdef ACCESSIBILITY nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { accService->ContentRangeInserted(mPresShell, aContainer, aStartChild, aEndChild); } #endif return NS_OK; } if (aContainer->HasFlag(NODE_IS_IN_SHADOW_TREE) && !aContainer->IsInNativeAnonymousSubtree() && (!aStartChild || !aStartChild->IsInNativeAnonymousSubtree()) && (!aEndChild || !aEndChild->IsInNativeAnonymousSubtree())) { // Recreate frames if content is inserted into a ShadowRoot // because children of ShadowRoot are rendered in place of // the children of the host. //XXXsmaug This is super unefficient! nsIContent* bindingParent = aContainer->GetBindingParent(); LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(bindingParent, false, REMOVE_FOR_RECONSTRUCTION, nullptr); LAYOUT_PHASE_TEMP_REENTER(); return rv; } // Put 'parentFrame' inside a scope so we don't confuse it with // 'insertion.mParentFrame' later. { nsContainerFrame* parentFrame = GetContentInsertionFrameFor(aContainer); // The xbl:children element won't have a frame, but default content can have the children as // a parent. While its uncommon to change the structure of the default content itself, a label, // for example, can be reframed by having its value attribute set or removed. if (!parentFrame && !aContainer->IsActiveChildrenElement()) { return NS_OK; } // Otherwise, we've got parent content. Find its frame. NS_ASSERTION(!parentFrame || parentFrame->GetContent() == aContainer || GetDisplayContentsStyleFor(aContainer), "New XBL code is possibly wrong!"); if (aAllowLazyConstruction && MaybeConstructLazily(CONTENTINSERT, aContainer, aStartChild)) { return NS_OK; } } InsertionPoint insertion; if (isSingleInsert) { // See if we have an XBL insertion point. If so, then that's our // real parent frame; if not, then the frame hasn't been built yet // and we just bail. insertion = GetInsertionPoint(aContainer, aStartChild); } else { // Get our insertion point. If we need to issue single ContentInserted's // GetRangeInsertionPoint will take care of that for us. LAYOUT_PHASE_TEMP_EXIT(); insertion = GetRangeInsertionPoint(aContainer, aStartChild, aEndChild, aAllowLazyConstruction); LAYOUT_PHASE_TEMP_REENTER(); } if (!insertion.mParentFrame) { return NS_OK; } bool isAppend, isRangeInsertSafe; nsIFrame* prevSibling = GetInsertionPrevSibling(&insertion, aStartChild, &isAppend, &isRangeInsertSafe); // check if range insert is safe if (!isSingleInsert && !isRangeInsertSafe) { // must fall back to a single ContertInserted for each child in the range LAYOUT_PHASE_TEMP_EXIT(); IssueSingleInsertNofications(aContainer, aStartChild, aEndChild, aAllowLazyConstruction); LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } nsIContent* container = insertion.mParentFrame->GetContent(); nsIAtom* frameType = insertion.mParentFrame->GetType(); LAYOUT_PHASE_TEMP_EXIT(); if (MaybeRecreateForFrameset(insertion.mParentFrame, aStartChild, aEndChild)) { LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } LAYOUT_PHASE_TEMP_REENTER(); // We should only get here with fieldsets when doing a single insert, because // fieldsets have multiple insertion points. NS_ASSERTION(isSingleInsert || frameType != nsGkAtoms::fieldSetFrame, "Unexpected parent"); if (IsFrameForFieldSet(insertion.mParentFrame, frameType) && aStartChild->NodeInfo()->NameAtom() == nsGkAtoms::legend) { // Just reframe the parent, since figuring out whether this // should be the new legend and then handling it is too complex. // We could do a little better here --- check if the fieldset already // has a legend which occurs earlier in its child list than this node, // and if so, proceed. But we'd have to extend nsFieldSetFrame // to locate this legend in the inserted frames and extract it. LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(insertion.mParentFrame->GetContent(), false, REMOVE_FOR_RECONSTRUCTION, nullptr); LAYOUT_PHASE_TEMP_REENTER(); return rv; } // Don't construct kids of leaves if (insertion.mParentFrame->IsLeaf()) { // Clear lazy bits so we don't try to construct again. ClearLazyBits(aStartChild, aEndChild); return NS_OK; } if (insertion.mParentFrame->IsFrameOfType(nsIFrame::eMathML)) { LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(insertion.mParentFrame->GetContent(), false, REMOVE_FOR_RECONSTRUCTION, nullptr); LAYOUT_PHASE_TEMP_REENTER(); return rv; } nsFrameConstructorState state(mPresShell, GetAbsoluteContainingBlock(insertion.mParentFrame, FIXED_POS), GetAbsoluteContainingBlock(insertion.mParentFrame, ABS_POS), GetFloatContainingBlock(insertion.mParentFrame), do_AddRef(Move(aFrameState))); state.mTreeMatchContext.InitAncestors(aContainer ? aContainer->AsElement() : nullptr); // Recover state for the containing block - we need to know if // it has :first-letter or :first-line style applied to it. The // reason we care is that the internal structure in these cases // is not the normal structure and requires custom updating // logic. nsContainerFrame* containingBlock = state.mFloatedItems.containingBlock; bool haveFirstLetterStyle = false; bool haveFirstLineStyle = false; // In order to shave off some cycles, we only dig up the // containing block haveFirst* flags if the parent frame where // the insertion/append is occurring is an inline or block // container. For other types of containers this isn't relevant. uint8_t parentDisplay = insertion.mParentFrame->GetDisplay(); // Examine the insertion.mParentFrame where the insertion is taking // place. If it's a certain kind of container then some special // processing is done. if ((NS_STYLE_DISPLAY_BLOCK == parentDisplay) || (NS_STYLE_DISPLAY_LIST_ITEM == parentDisplay) || (NS_STYLE_DISPLAY_INLINE == parentDisplay) || (NS_STYLE_DISPLAY_INLINE_BLOCK == parentDisplay)) { // Recover the special style flags for the containing block if (containingBlock) { haveFirstLetterStyle = HasFirstLetterStyle(containingBlock); haveFirstLineStyle = ShouldHaveFirstLineStyle(containingBlock->GetContent(), containingBlock->StyleContext()); } if (haveFirstLetterStyle) { // If our current insertion.mParentFrame is a Letter frame, use its parent as our // new parent hint if (insertion.mParentFrame->GetType() == nsGkAtoms::letterFrame) { // If insertion.mParentFrame is out of flow, then we actually want the parent of // the placeholder frame. if (insertion.mParentFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { nsPlaceholderFrame* placeholderFrame = GetPlaceholderFrameFor(insertion.mParentFrame); NS_ASSERTION(placeholderFrame, "No placeholder for out-of-flow?"); insertion.mParentFrame = placeholderFrame->GetParent(); } else { insertion.mParentFrame = insertion.mParentFrame->GetParent(); } } // Remove the old letter frames before doing the insertion RemoveLetterFrames(mPresShell, state.mFloatedItems.containingBlock); // Removing the letterframes messes around with the frame tree, removing // and creating frames. We need to reget our prevsibling, parent frame, // etc. prevSibling = GetInsertionPrevSibling(&insertion, aStartChild, &isAppend, &isRangeInsertSafe); // Need check whether a range insert is still safe. if (!isSingleInsert && !isRangeInsertSafe) { // Need to recover the letter frames first. RecoverLetterFrames(state.mFloatedItems.containingBlock); // must fall back to a single ContertInserted for each child in the range LAYOUT_PHASE_TEMP_EXIT(); IssueSingleInsertNofications(aContainer, aStartChild, aEndChild, aAllowLazyConstruction); LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } container = insertion.mParentFrame->GetContent(); frameType = insertion.mParentFrame->GetType(); } } if (!prevSibling) { // We're inserting the new frames as the first child. See if the // parent has a :before pseudo-element nsIFrame* firstChild = insertion.mParentFrame->GetFirstPrincipalChild(); if (firstChild && nsLayoutUtils::IsGeneratedContentFor(container, firstChild, nsCSSPseudoElements::before)) { // Insert the new frames after the last continuation of the :before prevSibling = firstChild->GetTailContinuation(); insertion.mParentFrame = prevSibling->GetParent()->GetContentInsertionFrame(); // Don't change isAppend here; we'll can call AppendFrames as needed, and // the change to our prevSibling doesn't affect that. } } FrameConstructionItemList items; ParentType parentType = GetParentType(frameType); FlattenedChildIterator iter(aContainer); bool haveNoXBLChildren = (!iter.XBLInvolved() || !iter.GetNextChild()); if (aStartChild->GetPreviousSibling() && parentType == eTypeBlock && haveNoXBLChildren) { // If there's a text node in the normal content list just before the // new nodes, and it has no frame, make a frame construction item for // it, because it might need a frame now. No need to do this if our // parent type is not block, though, since WipeContainingBlock // already handles that sitation. AddTextItemIfNeeded(state, insertion, aStartChild->GetPreviousSibling(), items); } if (isSingleInsert) { AddFrameConstructionItems(state, aStartChild, aStartChild->IsRootOfAnonymousSubtree(), insertion, items); } else { for (nsIContent* child = aStartChild; child != aEndChild; child = child->GetNextSibling()){ AddFrameConstructionItems(state, child, false, insertion, items); } } if (aEndChild && parentType == eTypeBlock && haveNoXBLChildren) { // If there's a text node in the normal content list just after the // new nodes, and it has no frame, make a frame construction item for // it, because it might need a frame now. No need to do this if our // parent type is not block, though, since WipeContainingBlock // already handles that sitation. AddTextItemIfNeeded(state, insertion, aEndChild, items); } // Perform special check for diddling around with the frames in // a special inline frame. // If we're appending before :after content, then we're not really // appending, so let WipeContainingBlock know that. LAYOUT_PHASE_TEMP_EXIT(); if (WipeContainingBlock(state, containingBlock, insertion.mParentFrame, items, isAppend, prevSibling)) { LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } LAYOUT_PHASE_TEMP_REENTER(); // If the container is a table and a caption will be appended, it needs to be // put in the outer table frame's additional child list. // We make no attempt here to set flags to indicate whether the list // will be at the start or end of a block. It doesn't seem worthwhile. nsFrameItems frameItems, captionItems; ConstructFramesFromItemList(state, items, insertion.mParentFrame, frameItems); if (frameItems.NotEmpty()) { for (nsIContent* child = aStartChild; child != aEndChild; child = child->GetNextSibling()){ InvalidateCanvasIfNeeded(mPresShell, child); } if (nsGkAtoms::tableFrame == frameType || nsGkAtoms::tableOuterFrame == frameType) { PullOutCaptionFrames(frameItems, captionItems); } } // If the parent of our current prevSibling is different from the frame we'll // actually use as the parent, then the calculated insertion point is now // invalid and as it is unknown where to insert correctly we append instead // (bug 341858). // This can affect our prevSibling and isAppend, but should not have any // effect on the WipeContainingBlock above, since this should only happen // when neither parent is a ib-split frame and should not affect whitespace // handling inside table-related frames (and in fact, can only happen when // one of the parents is an outer table and one is an inner table or when the // parent is a fieldset or fieldset content frame). So it won't affect the // {ib} or XUL box cases in WipeContainingBlock(), and the table pseudo // handling will only be affected by us maybe thinking we're not inserting // at the beginning, whereas we really are. That would have made us reframe // unnecessarily, but that's ok. // XXXbz we should push our frame construction item code up higher, so we // know what our items are by the time we start figuring out previous // siblings if (prevSibling && frameItems.NotEmpty() && frameItems.FirstChild()->GetParent() != prevSibling->GetParent()) { #ifdef DEBUG nsIFrame* frame1 = frameItems.FirstChild()->GetParent(); nsIFrame* frame2 = prevSibling->GetParent(); NS_ASSERTION(!IsFramePartOfIBSplit(frame1) && !IsFramePartOfIBSplit(frame2), "Neither should be ib-split"); NS_ASSERTION((frame1->GetType() == nsGkAtoms::tableFrame && frame2->GetType() == nsGkAtoms::tableOuterFrame) || (frame1->GetType() == nsGkAtoms::tableOuterFrame && frame2->GetType() == nsGkAtoms::tableFrame) || frame1->GetType() == nsGkAtoms::fieldSetFrame || (frame1->GetParent() && frame1->GetParent()->GetType() == nsGkAtoms::fieldSetFrame), "Unexpected frame types"); #endif isAppend = true; nsIFrame* appendAfterFrame; insertion.mParentFrame = ::AdjustAppendParentForAfterContent(this, container, frameItems.FirstChild()->GetParent(), aStartChild, &appendAfterFrame); prevSibling = ::FindAppendPrevSibling(insertion.mParentFrame, appendAfterFrame); } if (haveFirstLineStyle && insertion.mParentFrame == containingBlock) { // It's possible that the new frame goes into a first-line // frame. Look at it and see... if (isAppend) { // Use append logic when appending AppendFirstLineFrames(state, containingBlock->GetContent(), containingBlock, frameItems); } else { // Use more complicated insert logic when inserting // XXXbz this method is a no-op, so it's easy for the args being passed // here to make no sense without anyone noticing... If it ever stops // being a no-op, vet them carefully! InsertFirstLineFrames(state, container, containingBlock, &insertion.mParentFrame, prevSibling, frameItems); } } // We might have captions; put them into the caption list of the // outer table frame. if (captionItems.NotEmpty()) { NS_ASSERTION(nsGkAtoms::tableFrame == frameType || nsGkAtoms::tableOuterFrame == frameType, "parent for caption is not table?"); // We need to determine where to put the caption items; start with the // the parent frame that has already been determined and get the insertion // prevsibling of the first caption item. bool captionIsAppend; nsIFrame* captionPrevSibling = nullptr; // aIsRangeInsertSafe is ignored on purpose because it is irrelevant here. bool ignored; InsertionPoint captionInsertion(insertion.mParentFrame, insertion.mContainer); if (isSingleInsert) { captionPrevSibling = GetInsertionPrevSibling(&captionInsertion, aStartChild, &captionIsAppend, &ignored); } else { nsIContent* firstCaption = captionItems.FirstChild()->GetContent(); // It is very important here that we skip the children in // [aStartChild,aEndChild) when looking for a // prevsibling. captionPrevSibling = GetInsertionPrevSibling(&captionInsertion, firstCaption, &captionIsAppend, &ignored, aStartChild, aEndChild); } nsContainerFrame* outerTable = nullptr; if (GetCaptionAdjustedParent(captionInsertion.mParentFrame, captionItems.FirstChild(), &outerTable)) { // If the parent is not an outer table frame we will try to add frames // to a named child list that the parent does not honour and the frames // will get lost NS_ASSERTION(nsGkAtoms::tableOuterFrame == outerTable->GetType(), "Pseudo frame construction failure; " "a caption can be only a child of an outer table frame"); // If the parent of our current prevSibling is different from the frame // we'll actually use as the parent, then the calculated insertion // point is now invalid (bug 341382). if (captionPrevSibling && captionPrevSibling->GetParent() != outerTable) { captionPrevSibling = nullptr; } if (captionIsAppend) { AppendFrames(outerTable, nsIFrame::kCaptionList, captionItems); } else { InsertFrames(outerTable, nsIFrame::kCaptionList, captionPrevSibling, captionItems); } } } if (frameItems.NotEmpty()) { // Notify the parent frame if (isAppend) { AppendFramesToParent(state, insertion.mParentFrame, frameItems, prevSibling); } else { InsertFrames(insertion.mParentFrame, kPrincipalList, prevSibling, frameItems); } } if (haveFirstLetterStyle) { // Recover the letter frames for the containing block when // it has first-letter style. RecoverLetterFrames(state.mFloatedItems.containingBlock); } #ifdef DEBUG if (gReallyNoisyContentUpdates && insertion.mParentFrame) { printf("nsCSSFrameConstructor::ContentRangeInserted: resulting frame model:\n"); insertion.mParentFrame->List(stdout, 0); } #endif #ifdef ACCESSIBILITY nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { accService->ContentRangeInserted(mPresShell, aContainer, aStartChild, aEndChild); } #endif return NS_OK; } nsresult nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer, nsIContent* aChild, nsIContent* aOldNextSibling, RemoveFlags aFlags, bool* aDidReconstruct, nsIContent** aDestroyedFramesFor) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); NS_PRECONDITION(mUpdateCount != 0, "Should be in an update while destroying frames"); *aDidReconstruct = false; if (aDestroyedFramesFor) { *aDestroyedFramesFor = aChild; } if (aChild->IsHTMLElement(nsGkAtoms::body) || (!aContainer && aChild->IsElement())) { // This might be the element we propagated viewport scrollbar // styles from. Recompute those. mPresShell->GetPresContext()->UpdateViewportScrollbarStylesOverride(); } // XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and // the :empty pseudo-class? #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved container=%p child=%p " "old-next-sibling=%p\n", static_cast(aContainer), static_cast(aChild), static_cast(aOldNextSibling)); if (gReallyNoisyContentUpdates) { aContainer->List(stdout, 0); } } #endif nsresult rv = NS_OK; nsIFrame* childFrame = aChild->GetPrimaryFrame(); if (!childFrame || childFrame->GetContent() != aChild) { // XXXbz the GetContent() != aChild check is needed due to bug 135040. // Remove it once that's fixed. ClearUndisplayedContentIn(aChild, aContainer); } MOZ_ASSERT(!childFrame || !GetDisplayContentsStyleFor(aChild), "display:contents nodes shouldn't have a frame"); if (!childFrame && GetDisplayContentsStyleFor(aChild)) { nsIFrame* ancestorFrame = nullptr; nsIContent* ancestor = aContainer; for (; ancestor; ancestor = ancestor->GetParent()) { ancestorFrame = ancestor->GetPrimaryFrame(); if (ancestorFrame) { break; } } if (ancestorFrame) { nsTArray* generated = ancestorFrame->GetGenConPseudos(); if (generated) { *aDidReconstruct = true; LAYOUT_PHASE_TEMP_EXIT(); // XXXmats Can we recreate frames only for the ::after/::before content? // XXX Perhaps even only those that belong to the aChild sub-tree? RecreateFramesForContent(ancestor, false, aFlags, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); return NS_OK; } } FlattenedChildIterator iter(aChild); for (nsIContent* c = iter.GetNextChild(); c; c = iter.GetNextChild()) { if (c->GetPrimaryFrame() || GetDisplayContentsStyleFor(c)) { LAYOUT_PHASE_TEMP_EXIT(); rv = ContentRemoved(aChild, c, nullptr, aFlags, aDidReconstruct, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); NS_ENSURE_SUCCESS(rv, rv); if (aFlags != REMOVE_DESTROY_FRAMES && *aDidReconstruct) { return rv; } } } ClearDisplayContentsIn(aChild, aContainer); } nsPresContext* presContext = mPresShell->GetPresContext(); #ifdef MOZ_XUL if (NotifyListBoxBody(presContext, aContainer, aChild, aOldNextSibling, mDocument, childFrame, CONTENT_REMOVED)) { if (aFlags == REMOVE_DESTROY_FRAMES) { CaptureStateForFramesOf(aChild, mTempFrameTreeState); } return NS_OK; } #endif // MOZ_XUL // If we're removing the root, then make sure to remove things starting at // the viewport's child instead of the primary frame (which might even be // null if the root had an XBL binding or display:none, even though the // frames above it got created). We do the adjustment after the childFrame // check above, because we do want to clear any undisplayed content we might // have for the root. Detecting removal of a root is a little exciting; in // particular, having a null aContainer is necessary but NOT sufficient. Due // to how we process reframes, the content node might not even be in our // document by now. So explicitly check whether the viewport's first kid's // content node is aChild. bool isRoot = false; if (!aContainer) { nsIFrame* viewport = GetRootFrame(); if (viewport) { nsIFrame* firstChild = viewport->GetFirstPrincipalChild(); if (firstChild && firstChild->GetContent() == aChild) { isRoot = true; childFrame = firstChild; NS_ASSERTION(!childFrame->GetNextSibling(), "How did that happen?"); } } } if (aContainer && aContainer->HasFlag(NODE_IS_IN_SHADOW_TREE) && !aContainer->IsInNativeAnonymousSubtree() && !aChild->IsInNativeAnonymousSubtree()) { // Recreate frames if content is removed from a ShadowRoot // because it may contain an insertion point which can change // how the host is rendered. //XXXsmaug This is super unefficient! nsIContent* bindingParent = aContainer->GetBindingParent(); *aDidReconstruct = true; LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(bindingParent, false, aFlags, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); return rv; } if (aFlags == REMOVE_DESTROY_FRAMES) { CaptureStateForFramesOf(aChild, mTempFrameTreeState); } if (childFrame) { InvalidateCanvasIfNeeded(mPresShell, aChild); // See whether we need to remove more than just childFrame LAYOUT_PHASE_TEMP_EXIT(); nsIContent* container; if (MaybeRecreateContainerForFrameRemoval(childFrame, aFlags, &rv, &container)) { LAYOUT_PHASE_TEMP_REENTER(); MOZ_ASSERT(container); *aDidReconstruct = true; if (aDestroyedFramesFor) { *aDestroyedFramesFor = container; } return rv; } LAYOUT_PHASE_TEMP_REENTER(); // Get the childFrame's parent frame nsIFrame* parentFrame = childFrame->GetParent(); nsIAtom* parentType = parentFrame->GetType(); if (parentType == nsGkAtoms::frameSetFrame && IsSpecialFramesetChild(aChild)) { // Just reframe the parent, since framesets are weird like that. *aDidReconstruct = true; LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(parentFrame->GetContent(), false, aFlags, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); return rv; } // If we're a child of MathML, then we should reframe the MathML content. // If we're non-MathML, then we would be wrapped in a block so we need to // check our grandparent in that case. nsIFrame* possibleMathMLAncestor = parentType == nsGkAtoms::blockFrame ? parentFrame->GetParent() : parentFrame; if (possibleMathMLAncestor->IsFrameOfType(nsIFrame::eMathML)) { *aDidReconstruct = true; LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(possibleMathMLAncestor->GetContent(), false, aFlags, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); return rv; } // Undo XUL wrapping if it's no longer needed. // (If we're in the XUL block-wrapping situation, parentFrame is the // wrapper frame.) nsIFrame* grandparentFrame = parentFrame->GetParent(); if (grandparentFrame && grandparentFrame->IsBoxFrame() && (grandparentFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && // check if this frame is the only one needing wrapping aChild == AnyKidsNeedBlockParent(parentFrame->GetFirstPrincipalChild()) && !AnyKidsNeedBlockParent(childFrame->GetNextSibling())) { *aDidReconstruct = true; LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(grandparentFrame->GetContent(), true, aFlags, aDestroyedFramesFor); LAYOUT_PHASE_TEMP_REENTER(); return rv; } #ifdef ACCESSIBILITY nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { accService->ContentRemoved(mPresShell, aChild); } #endif // Examine the containing-block for the removed content and see if // :first-letter style applies. nsIFrame* inflowChild = childFrame; if (childFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { inflowChild = GetPlaceholderFrameFor(childFrame); NS_ASSERTION(inflowChild, "No placeholder for out-of-flow?"); } nsContainerFrame* containingBlock = GetFloatContainingBlock(inflowChild->GetParent()); bool haveFLS = containingBlock && HasFirstLetterStyle(containingBlock); if (haveFLS) { // Trap out to special routine that handles adjusting a blocks // frame tree when first-letter style is present. #ifdef NOISY_FIRST_LETTER printf("ContentRemoved: containingBlock="); nsFrame::ListTag(stdout, containingBlock); printf(" parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif // First update the containing blocks structure by removing the // existing letter frames. This makes the subsequent logic // simpler. RemoveLetterFrames(mPresShell, containingBlock); // Recover childFrame and parentFrame childFrame = aChild->GetPrimaryFrame(); if (!childFrame || childFrame->GetContent() != aChild) { // XXXbz the GetContent() != aChild check is needed due to bug 135040. // Remove it once that's fixed. ClearUndisplayedContentIn(aChild, aContainer); return NS_OK; } parentFrame = childFrame->GetParent(); parentType = parentFrame->GetType(); #ifdef NOISY_FIRST_LETTER printf(" ==> revised parentFrame="); nsFrame::ListTag(stdout, parentFrame); printf(" childFrame="); nsFrame::ListTag(stdout, childFrame); printf("\n"); #endif } #ifdef DEBUG if (gReallyNoisyContentUpdates) { printf("nsCSSFrameConstructor::ContentRemoved: childFrame="); nsFrame::ListTag(stdout, childFrame); putchar('\n'); parentFrame->List(stdout, 0); } #endif // Notify the parent frame that it should delete the frame if (childFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { childFrame = GetPlaceholderFrameFor(childFrame); NS_ASSERTION(childFrame, "Missing placeholder frame for out of flow."); parentFrame = childFrame->GetParent(); } RemoveFrame(nsLayoutUtils::GetChildListNameFor(childFrame), childFrame); if (isRoot) { mRootElementFrame = nullptr; mRootElementStyleFrame = nullptr; mDocElementContainingBlock = nullptr; mPageSequenceFrame = nullptr; mGfxScrollFrame = nullptr; mHasRootAbsPosContainingBlock = false; } if (haveFLS && mRootElementFrame) { RecoverLetterFrames(containingBlock); } // If we're just reconstructing frames for the element, then the // following ContentInserted notification on the element will // take care of fixing up any adjacent text nodes. We don't need // to do this if the table parent type of our parent type is not // eTypeBlock, though, because in that case the whitespace isn't // being suppressed due to us anyway. if (aContainer && !aChild->IsRootOfAnonymousSubtree() && aFlags == REMOVE_CONTENT && GetParentType(parentType) == eTypeBlock) { // Adjacent whitespace-only text nodes might have been suppressed if // this node does not have inline ends. Create frames for them now // if necessary. // Reframe any text node just before the node being removed, if there is // one, and if it's not the last child or the first child. If a whitespace // textframe was being suppressed and it's now the last child or first // child then it can stay suppressed since the parent must be a block // and hence it's adjacent to a block end. // If aOldNextSibling is null, then the text node before the node being // removed is the last node, and we don't need to worry about it. if (aOldNextSibling) { nsIContent* prevSibling = aOldNextSibling->GetPreviousSibling(); if (prevSibling && prevSibling->GetPreviousSibling()) { LAYOUT_PHASE_TEMP_EXIT(); ReframeTextIfNeeded(aContainer, prevSibling); LAYOUT_PHASE_TEMP_REENTER(); } } // Reframe any text node just after the node being removed, if there is // one, and if it's not the last child or the first child. if (aOldNextSibling && aOldNextSibling->GetNextSibling() && aOldNextSibling->GetPreviousSibling()) { LAYOUT_PHASE_TEMP_EXIT(); ReframeTextIfNeeded(aContainer, aOldNextSibling); LAYOUT_PHASE_TEMP_REENTER(); } } #ifdef DEBUG if (gReallyNoisyContentUpdates && parentFrame) { printf("nsCSSFrameConstructor::ContentRemoved: resulting frame model:\n"); parentFrame->List(stdout, 0); } #endif } return rv; } /** * This method invalidates the canvas when frames are removed or added for a * node that might have its background propagated to the canvas, i.e., a * document root node or an HTML BODY which is a child of the root node. * * @param aFrame a frame for a content node about to be removed or a frame that * was just created for a content node that was inserted. */ static void InvalidateCanvasIfNeeded(nsIPresShell* presShell, nsIContent* node) { NS_PRECONDITION(presShell->GetRootFrame(), "What happened here?"); NS_PRECONDITION(presShell->GetPresContext(), "Say what?"); // Note that both in ContentRemoved and ContentInserted the content node // will still have the right parent pointer, so looking at that is ok. nsIContent* parent = node->GetParent(); if (parent) { // Has a parent; might not be what we want nsIContent* grandParent = parent->GetParent(); if (grandParent) { // Has a grandparent, so not what we want return; } // Check whether it's an HTML body if (!node->IsHTMLElement(nsGkAtoms::body)) { return; } } // At this point the node has no parent or it's an HTML child of the // root. We might not need to invalidate in this case (eg we might be in // XHTML or something), but chances are we want to. Play it safe. // Invalidate the viewport. nsIFrame* rootFrame = presShell->GetRootFrame(); rootFrame->InvalidateFrameSubtree(); } nsIFrame* nsCSSFrameConstructor::EnsureFrameForTextNode(nsGenericDOMDataNode* aContent) { if (aContent->HasFlag(NS_CREATE_FRAME_IF_NON_WHITESPACE) && !mAlwaysCreateFramesForIgnorableWhitespace) { // Text frame may have been suppressed. Disable suppression and signal // that a flush should be performed. We do this on a document-wide // basis so that pages that repeatedly query metrics for // collapsed-whitespace text nodes don't trigger pathological behavior. mAlwaysCreateFramesForIgnorableWhitespace = true; nsAutoScriptBlocker blocker; BeginUpdate(); ReconstructDocElementHierarchy(); EndUpdate(); } return aContent->GetPrimaryFrame(); } nsresult nsCSSFrameConstructor::CharacterDataChanged(nsIContent* aContent, CharacterDataChangeInfo* aInfo) { AUTO_LAYOUT_PHASE_ENTRY_POINT(mPresShell->GetPresContext(), FrameC); nsresult rv = NS_OK; if ((aContent->HasFlag(NS_CREATE_FRAME_IF_NON_WHITESPACE) && !aContent->TextIsOnlyWhitespace()) || (aContent->HasFlag(NS_REFRAME_IF_WHITESPACE) && aContent->TextIsOnlyWhitespace())) { #ifdef DEBUG nsIFrame* frame = aContent->GetPrimaryFrame(); NS_ASSERTION(!frame || !frame->IsGeneratedContentFrame(), "Bit should never be set on generated content"); #endif LAYOUT_PHASE_TEMP_EXIT(); nsresult rv = RecreateFramesForContent(aContent, false, REMOVE_FOR_RECONSTRUCTION, nullptr); LAYOUT_PHASE_TEMP_REENTER(); return rv; } // Find the child frame nsIFrame* frame = aContent->GetPrimaryFrame(); // Notify the first frame that maps the content. It will generate a reflow // command // It's possible the frame whose content changed isn't inserted into the // frame hierarchy yet, or that there is no frame that maps the content if (nullptr != frame) { #if 0 NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("nsCSSFrameConstructor::CharacterDataChanged: content=%p[%s] subcontent=%p frame=%p", aContent, ContentTag(aContent, 0), aSubContent, frame)); #endif // Special check for text content that is a child of a letter frame. If // this happens, we should remove the letter frame, do whatever we're // planning to do with this notification, then put the letter frame back. // Note that this is basically what RecreateFramesForContent ends up doing; // the reason we dont' want to call that here is that our text content // could be native anonymous, in which case RecreateFramesForContent would // completely barf on it. And recreating the non-anonymous ancestor would // just lead us to come back into this notification (e.g. if quotes or // counters are involved), leading to a loop. nsContainerFrame* block = GetFloatContainingBlock(frame); bool haveFirstLetterStyle = false; if (block) { // See if the block has first-letter style applied to it. haveFirstLetterStyle = HasFirstLetterStyle(block); if (haveFirstLetterStyle) { RemoveLetterFrames(mPresShell, block); // Reget |frame|, since we might have killed it. // Do we really need to call CharacterDataChanged in this case, though? frame = aContent->GetPrimaryFrame(); NS_ASSERTION(frame, "Should have frame here!"); } } frame->CharacterDataChanged(aInfo); if (haveFirstLetterStyle) { RecoverLetterFrames(block); } } return rv; } void nsCSSFrameConstructor::BeginUpdate() { NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(), "Someone forgot a script blocker"); nsRootPresContext* rootPresContext = mPresShell->GetPresContext()->GetRootPresContext(); if (rootPresContext) { rootPresContext->IncrementDOMGeneration(); } ++sGlobalGenerationNumber; ++mUpdateCount; } void nsCSSFrameConstructor::EndUpdate() { if (mUpdateCount == 1) { // This is the end of our last update. Before we decrement // mUpdateCount, recalc quotes and counters as needed. RecalcQuotesAndCounters(); NS_ASSERTION(mUpdateCount == 1, "Odd update count"); } NS_ASSERTION(mUpdateCount, "Negative mUpdateCount!"); --mUpdateCount; } void nsCSSFrameConstructor::RecalcQuotesAndCounters() { nsAutoScriptBlocker scriptBlocker; if (mQuotesDirty) { mQuotesDirty = false; mQuoteList.RecalcAll(); } if (mCountersDirty) { mCountersDirty = false; mCounterManager.RecalcAll(); } NS_ASSERTION(!mQuotesDirty, "Quotes updates will be lost"); NS_ASSERTION(!mCountersDirty, "Counter updates will be lost"); } void nsCSSFrameConstructor::NotifyCounterStylesAreDirty() { NS_PRECONDITION(mUpdateCount != 0, "Should be in an update"); mCounterManager.SetAllCounterStylesDirty(); CountersDirty(); } void nsCSSFrameConstructor::WillDestroyFrameTree() { #if defined(DEBUG_dbaron_off) mCounterManager.Dump(); #endif mIsDestroyingFrameTree = true; // Prevent frame tree destruction from being O(N^2) mQuoteList.Clear(); mCounterManager.Clear(); // Remove our presshell as a style flush observer. But leave // RestyleManager::mObservingRefreshDriver true so we don't readd to // it even if someone tries to post restyle events on us from this // point on for some reason. mPresShell->GetPresContext()->RefreshDriver()-> RemoveStyleFlushObserver(mPresShell); nsFrameManager::Destroy(); } //STATIC // XXXbz I'd really like this method to go away. Once we have inline-block and // I can just use that for sized broken images, that can happen, maybe. void nsCSSFrameConstructor::GetAlternateTextFor(nsIContent* aContent, nsIAtom* aTag, // content object's tag nsXPIDLString& aAltText) { // The "alt" attribute specifies alternate text that is rendered // when the image can not be displayed // If there's no "alt" attribute, and aContent is an input // element, then use the value of the "value" attribute if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aAltText) && nsGkAtoms::input == aTag) { // If there's no "value" attribute either, then use the localized string // for "Submit" as the alternate text. if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aAltText)) { nsContentUtils::GetLocalizedString(nsContentUtils::eFORMS_PROPERTIES, "Submit", aAltText); } } } nsIFrame* nsCSSFrameConstructor::CreateContinuingOuterTableFrame(nsIPresShell* aPresShell, nsPresContext* aPresContext, nsIFrame* aFrame, nsContainerFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext) { nsTableOuterFrame* newFrame = NS_NewTableOuterFrame(aPresShell, aStyleContext); newFrame->Init(aContent, aParentFrame, aFrame); // Create a continuing inner table frame, and if there's a caption then // replicate the caption nsFrameItems newChildFrames; nsIFrame* childFrame = aFrame->GetFirstPrincipalChild(); if (childFrame) { nsIFrame* continuingTableFrame = CreateContinuingFrame(aPresContext, childFrame, newFrame); newChildFrames.AddChild(continuingTableFrame); NS_ASSERTION(!childFrame->GetNextSibling(),"there can be only one inner table frame"); } // Set the outer table's initial child list newFrame->SetInitialChildList(kPrincipalList, newChildFrames); return newFrame; } nsIFrame* nsCSSFrameConstructor::CreateContinuingTableFrame(nsIPresShell* aPresShell, nsIFrame* aFrame, nsContainerFrame* aParentFrame, nsIContent* aContent, nsStyleContext* aStyleContext) { nsTableFrame* newFrame = NS_NewTableFrame(aPresShell, aStyleContext); newFrame->Init(aContent, aParentFrame, aFrame); // Replicate any header/footer frames nsFrameItems childFrames; nsIFrame* childFrame = aFrame->GetFirstPrincipalChild(); for ( ; childFrame; childFrame = childFrame->GetNextSibling()) { // See if it's a header/footer, possibly wrapped in a scroll frame. nsTableRowGroupFrame* rowGroupFrame = static_cast(childFrame); // If the row group was continued, then don't replicate it. nsIFrame* rgNextInFlow = rowGroupFrame->GetNextInFlow(); if (rgNextInFlow) { rowGroupFrame->SetRepeatable(false); } else if (rowGroupFrame->IsRepeatable()) { // Replicate the header/footer frame. nsTableRowGroupFrame* headerFooterFrame; nsFrameItems childItems; nsFrameConstructorState state(mPresShell, GetAbsoluteContainingBlock(newFrame, FIXED_POS), GetAbsoluteContainingBlock(newFrame, ABS_POS), nullptr); state.mCreatingExtraFrames = true; nsStyleContext* const headerFooterStyleContext = rowGroupFrame->StyleContext(); headerFooterFrame = static_cast (NS_NewTableRowGroupFrame(aPresShell, headerFooterStyleContext)); nsIContent* headerFooter = rowGroupFrame->GetContent(); headerFooterFrame->Init(headerFooter, newFrame, nullptr); nsFrameConstructorSaveState absoluteSaveState; MakeTablePartAbsoluteContainingBlockIfNeeded(state, headerFooterStyleContext->StyleDisplay(), absoluteSaveState, headerFooterFrame); ProcessChildren(state, headerFooter, rowGroupFrame->StyleContext(), headerFooterFrame, true, childItems, false, nullptr); NS_ASSERTION(state.mFloatedItems.IsEmpty(), "unexpected floated element"); headerFooterFrame->SetInitialChildList(kPrincipalList, childItems); headerFooterFrame->SetRepeatable(true); // Table specific initialization headerFooterFrame->InitRepeatedFrame(rowGroupFrame); // XXX Deal with absolute and fixed frames... childFrames.AddChild(headerFooterFrame); } } // Set the table frame's initial child list newFrame->SetInitialChildList(kPrincipalList, childFrames); return newFrame; } nsIFrame* nsCSSFrameConstructor::CreateContinuingFrame(nsPresContext* aPresContext, nsIFrame* aFrame, nsContainerFrame* aParentFrame, bool aIsFluid) { nsIPresShell* shell = aPresContext->PresShell(); nsStyleContext* styleContext = aFrame->StyleContext(); nsIFrame* newFrame = nullptr; nsIFrame* nextContinuation = aFrame->GetNextContinuation(); nsIFrame* nextInFlow = aFrame->GetNextInFlow(); // Use the frame type to determine what type of frame to create nsIAtom* frameType = aFrame->GetType(); nsIContent* content = aFrame->GetContent(); NS_ASSERTION(aFrame->GetSplittableType() != NS_FRAME_NOT_SPLITTABLE, "why CreateContinuingFrame for a non-splittable frame?"); if (nsGkAtoms::textFrame == frameType) { newFrame = NS_NewContinuingTextFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::inlineFrame == frameType) { newFrame = NS_NewInlineFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::blockFrame == frameType) { MOZ_ASSERT(!aFrame->IsTableCaption(), "no support for fragmenting table captions yet"); newFrame = NS_NewBlockFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); #ifdef MOZ_XUL } else if (nsGkAtoms::XULLabelFrame == frameType) { newFrame = NS_NewXULLabelFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); #endif } else if (nsGkAtoms::columnSetFrame == frameType) { MOZ_ASSERT(!aFrame->IsTableCaption(), "no support for fragmenting table captions yet"); newFrame = NS_NewColumnSetFrame(shell, styleContext, nsFrameState(0)); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::pageFrame == frameType) { nsContainerFrame* canvasFrame; newFrame = ConstructPageFrame(shell, aParentFrame, aFrame, canvasFrame); } else if (nsGkAtoms::tableOuterFrame == frameType) { newFrame = CreateContinuingOuterTableFrame(shell, aPresContext, aFrame, aParentFrame, content, styleContext); } else if (nsGkAtoms::tableFrame == frameType) { newFrame = CreateContinuingTableFrame(shell, aFrame, aParentFrame, content, styleContext); } else if (nsGkAtoms::tableRowGroupFrame == frameType) { newFrame = NS_NewTableRowGroupFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); if (newFrame->GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN) { nsTableFrame::RegisterPositionedTablePart(newFrame); } } else if (nsGkAtoms::tableRowFrame == frameType) { nsTableRowFrame* rowFrame = NS_NewTableRowFrame(shell, styleContext); rowFrame->Init(content, aParentFrame, aFrame); if (rowFrame->GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN) { nsTableFrame::RegisterPositionedTablePart(rowFrame); } // Create a continuing frame for each table cell frame nsFrameItems newChildList; nsIFrame* cellFrame = aFrame->GetFirstPrincipalChild(); while (cellFrame) { // See if it's a table cell frame if (IS_TABLE_CELL(cellFrame->GetType())) { nsIFrame* continuingCellFrame = CreateContinuingFrame(aPresContext, cellFrame, rowFrame); newChildList.AddChild(continuingCellFrame); } cellFrame = cellFrame->GetNextSibling(); } rowFrame->SetInitialChildList(kPrincipalList, newChildList); newFrame = rowFrame; } else if (IS_TABLE_CELL(frameType)) { // Warning: If you change this and add a wrapper frame around table cell // frames, make sure Bug 368554 doesn't regress! // See IsInAutoWidthTableCellForQuirk() in nsImageFrame.cpp. nsTableFrame* tableFrame = static_cast(aParentFrame)->GetTableFrame(); nsTableCellFrame* cellFrame = NS_NewTableCellFrame(shell, styleContext, tableFrame); cellFrame->Init(content, aParentFrame, aFrame); if (cellFrame->GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN) { nsTableFrame::RegisterPositionedTablePart(cellFrame); } // Create a continuing area frame nsIFrame* blockFrame = aFrame->GetFirstPrincipalChild(); nsIFrame* continuingBlockFrame = CreateContinuingFrame(aPresContext, blockFrame, static_cast(cellFrame)); SetInitialSingleChild(cellFrame, continuingBlockFrame); newFrame = cellFrame; } else if (nsGkAtoms::lineFrame == frameType) { newFrame = NS_NewFirstLineFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::letterFrame == frameType) { newFrame = NS_NewFirstLetterFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::imageFrame == frameType) { newFrame = NS_NewImageFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::imageControlFrame == frameType) { newFrame = NS_NewImageControlFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::placeholderFrame == frameType) { // create a continuing out of flow frame nsIFrame* oofFrame = nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame); nsIFrame* oofContFrame = CreateContinuingFrame(aPresContext, oofFrame, aParentFrame); newFrame = CreatePlaceholderFrameFor(shell, content, oofContFrame, styleContext, aParentFrame, aFrame, aFrame->GetStateBits() & PLACEHOLDER_TYPE_MASK); } else if (nsGkAtoms::fieldSetFrame == frameType) { nsContainerFrame* fieldset = NS_NewFieldSetFrame(shell, styleContext); fieldset->Init(content, aParentFrame, aFrame); // Create a continuing area frame // XXXbz we really shouldn't have to do this by hand! nsContainerFrame* blockFrame = GetFieldSetBlockFrame(aFrame); if (blockFrame) { nsIFrame* continuingBlockFrame = CreateContinuingFrame(aPresContext, blockFrame, fieldset); // Set the fieldset's initial child list SetInitialSingleChild(fieldset, continuingBlockFrame); } else { MOZ_ASSERT(aFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER, "FieldSet block may only be null for overflow containers"); } newFrame = fieldset; } else if (nsGkAtoms::legendFrame == frameType) { newFrame = NS_NewLegendFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::flexContainerFrame == frameType) { newFrame = NS_NewFlexContainerFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::rubyFrame == frameType) { newFrame = NS_NewRubyFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::rubyBaseContainerFrame == frameType) { newFrame = NS_NewRubyBaseContainerFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else if (nsGkAtoms::rubyTextContainerFrame == frameType) { newFrame = NS_NewRubyTextContainerFrame(shell, styleContext); newFrame->Init(content, aParentFrame, aFrame); } else { NS_RUNTIMEABORT("unexpected frame type"); } // Init() set newFrame to be a fluid continuation of aFrame. // If we want a non-fluid continuation, we need to call SetPrevContinuation() // to reset NS_FRAME_IS_FLUID_CONTINUATION. if (!aIsFluid) { newFrame->SetPrevContinuation(aFrame); } // A continuation of generated content is also generated content if (aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT) { newFrame->AddStateBits(NS_FRAME_GENERATED_CONTENT); } // A continuation of nsIAnonymousContentCreator content is also // nsIAnonymousContentCreator created content if (aFrame->GetStateBits() & NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT) { newFrame->AddStateBits(NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT); } // A continuation of an out-of-flow is also an out-of-flow if (aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) { newFrame->AddStateBits(NS_FRAME_OUT_OF_FLOW); } if (nextInFlow) { nextInFlow->SetPrevInFlow(newFrame); newFrame->SetNextInFlow(nextInFlow); } else if (nextContinuation) { nextContinuation->SetPrevContinuation(newFrame); newFrame->SetNextContinuation(nextContinuation); } NS_POSTCONDITION(!newFrame->GetNextSibling(), "unexpected sibling"); return newFrame; } nsresult nsCSSFrameConstructor::ReplicateFixedFrames(nsPageContentFrame* aParentFrame) { // Now deal with fixed-pos things.... They should appear on all pages, // so we want to move over the placeholders when processing the child // of the pageContentFrame. nsIFrame* prevPageContentFrame = aParentFrame->GetPrevInFlow(); if (!prevPageContentFrame) { return NS_OK; } nsContainerFrame* canvasFrame = do_QueryFrame(aParentFrame->GetFirstPrincipalChild()); nsIFrame* prevCanvasFrame = prevPageContentFrame->GetFirstPrincipalChild(); if (!canvasFrame || !prevCanvasFrame) { // document's root element frame missing return NS_ERROR_UNEXPECTED; } nsFrameItems fixedPlaceholders; nsIFrame* firstFixed = prevPageContentFrame->GetChildList(nsIFrame::kFixedList).FirstChild(); if (!firstFixed) { return NS_OK; } // Don't allow abs-pos descendants of the fixed content to escape the content. // This should not normally be possible (because fixed-pos elements should // be absolute containers) but fixed-pos tables currently aren't abs-pos // containers. nsFrameConstructorState state(mPresShell, aParentFrame, nullptr, mRootElementFrame); state.mCreatingExtraFrames = true; // We can't use an ancestor filter here, because we're not going to // be usefully recurring down the tree. This means that other // places in frame construction can't assume a filter is // initialized! // Iterate across fixed frames and replicate each whose placeholder is a // descendant of aFrame. (We don't want to explicitly copy placeholders that // are within fixed frames, because that would cause duplicates on the new // page - bug 389619) for (nsIFrame* fixed = firstFixed; fixed; fixed = fixed->GetNextSibling()) { nsIFrame* prevPlaceholder = GetPlaceholderFrameFor(fixed); if (prevPlaceholder && nsLayoutUtils::IsProperAncestorFrame(prevCanvasFrame, prevPlaceholder)) { // We want to use the same style as the primary style frame for // our content nsIContent* content = fixed->GetContent(); nsStyleContext* styleContext = nsLayoutUtils::GetStyleFrame(content)->StyleContext(); FrameConstructionItemList items; AddFrameConstructionItemsInternal(state, content, canvasFrame, content->NodeInfo()->NameAtom(), content->GetNameSpaceID(), true, styleContext, ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK, nullptr, items); ConstructFramesFromItemList(state, items, canvasFrame, fixedPlaceholders); } } // Add the placeholders to our primary child list. // XXXbz this is a little screwed up, since the fixed frames will have // broken auto-positioning. Oh, well. NS_ASSERTION(!canvasFrame->GetFirstPrincipalChild(), "leaking frames; doc root continuation must be empty"); canvasFrame->SetInitialChildList(kPrincipalList, fixedPlaceholders); return NS_OK; } nsCSSFrameConstructor::InsertionPoint nsCSSFrameConstructor::GetInsertionPoint(nsIContent* aContainer, nsIContent* aChild) { nsBindingManager* bindingManager = mDocument->BindingManager(); nsIContent* insertionElement; if (aChild) { // We've got an explicit insertion child. Check to see if it's // anonymous. if (aChild->GetBindingParent() == aContainer) { // This child content is anonymous. Don't use the insertion // point, since that's only for the explicit kids. return InsertionPoint(GetContentInsertionFrameFor(aContainer), aContainer); } if (nsContentUtils::HasDistributedChildren(aContainer)) { // The container distributes nodes, use the frame of the flattened tree parent. // It may be the case that the node is distributed but not matched to any // insertion points, so there is no flattened parent. nsIContent* flattenedParent = aChild->GetFlattenedTreeParent(); if (flattenedParent) { return InsertionPoint(GetContentInsertionFrameFor(flattenedParent), flattenedParent); } return InsertionPoint(); } insertionElement = bindingManager->FindNestedInsertionPoint(aContainer, aChild); } else { if (nsContentUtils::HasDistributedChildren(aContainer)) { // The container distributes nodes to shadow DOM insertion points. // Return with aMultiple set to true to induce callers to insert children // individually into the node's flattened tree parent. return InsertionPoint(nullptr, nullptr, true); } bool multiple; insertionElement = bindingManager->FindNestedSingleInsertionPoint(aContainer, &multiple); if (multiple) { return InsertionPoint(nullptr, nullptr, true); } } if (!insertionElement) { insertionElement = aContainer; } InsertionPoint insertion(GetContentInsertionFrameFor(insertionElement), insertionElement); // Fieldset frames have multiple normal flow child frame lists so handle it // the same as if it had multiple content insertion points. if (insertion.mParentFrame && insertion.mParentFrame->GetType() == nsGkAtoms::fieldSetFrame) { insertion.mMultiple = true; } return insertion; } // Capture state for the frame tree rooted at the frame associated with the // content object, aContent void nsCSSFrameConstructor::CaptureStateForFramesOf(nsIContent* aContent, nsILayoutHistoryState* aHistoryState) { if (!aHistoryState) { return; } nsIFrame* frame = aContent->GetPrimaryFrame(); if (frame == mRootElementFrame) { frame = mRootElementFrame ? GetAbsoluteContainingBlock(mRootElementFrame, FIXED_POS) : GetRootFrame(); } for ( ; frame; frame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame)) { CaptureFrameState(frame, aHistoryState); } } static bool EqualURIs(mozilla::css::URLValue *aURI1, mozilla::css::URLValue *aURI2) { return aURI1 == aURI2 || // handle null==null, and optimize (aURI1 && aURI2 && aURI1->URIEquals(*aURI2)); } nsStyleContext* nsCSSFrameConstructor::MaybeRecreateFramesForElement(Element* aElement) { RefPtr oldContext = GetUndisplayedContent(aElement); uint8_t oldDisplay = NS_STYLE_DISPLAY_NONE; if (!oldContext) { oldContext = GetDisplayContentsStyleFor(aElement); if (!oldContext) { return nullptr; } oldDisplay = NS_STYLE_DISPLAY_CONTENTS; } // The parent has a frame, so try resolving a new context. RefPtr newContext = mPresShell->StyleSet()-> ResolveStyleFor(aElement, oldContext->GetParent()); if (oldDisplay == NS_STYLE_DISPLAY_NONE) { ChangeUndisplayedContent(aElement, newContext); } else { ChangeDisplayContents(aElement, newContext); } const nsStyleDisplay* disp = newContext->StyleDisplay(); if (oldDisplay == disp->mDisplay) { // We can skip trying to recreate frames here, but only if our style // context does not have a binding URI that differs from our old one. // Otherwise, we should try to recreate, because we may want to apply the // new binding if (!disp->mBinding) { return newContext; } const nsStyleDisplay* oldDisp = oldContext->PeekStyleDisplay(); if (oldDisp && EqualURIs(disp->mBinding, oldDisp->mBinding)) { return newContext; } } RecreateFramesForContent(aElement, false, REMOVE_FOR_RECONSTRUCTION, nullptr); return nullptr; } static bool IsWhitespaceFrame(nsIFrame* aFrame) { MOZ_ASSERT(aFrame, "invalid argument"); return aFrame->GetType() == nsGkAtoms::textFrame && aFrame->GetContent()->TextIsOnlyWhitespace(); } static nsIFrame* FindFirstNonWhitespaceChild(nsIFrame* aParentFrame) { nsIFrame* f = aParentFrame->GetFirstPrincipalChild(); while (f && IsWhitespaceFrame(f)) { f = f->GetNextSibling(); } return f; } static nsIFrame* FindNextNonWhitespaceSibling(nsIFrame* aFrame) { nsIFrame* f = aFrame; do { f = f->GetNextSibling(); } while (f && IsWhitespaceFrame(f)); return f; } static nsIFrame* FindPreviousNonWhitespaceSibling(nsIFrame* aFrame) { nsIFrame* f = aFrame; do { f = f->GetPrevSibling(); } while (f && IsWhitespaceFrame(f)); return f; } bool nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval(nsIFrame* aFrame, RemoveFlags aFlags, nsresult* aResult, nsIContent** aDestroyedFramesFor) { NS_PRECONDITION(aFrame, "Must have a frame"); NS_PRECONDITION(aFrame->GetParent(), "Frame shouldn't be root"); NS_PRECONDITION(aResult, "Null out param?"); NS_PRECONDITION(aFrame == aFrame->FirstContinuation(), "aFrame not the result of GetPrimaryFrame()?"); *aDestroyedFramesFor = nullptr; if (IsFramePartOfIBSplit(aFrame)) { // The removal functions can't handle removal of an {ib} split directly; we // need to rebuild the containing block. #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" is ib-split\n"); } #endif *aResult = ReframeContainingBlock(aFrame, aFlags, aDestroyedFramesFor); return true; } nsContainerFrame* insertionFrame = aFrame->GetContentInsertionFrame(); if (insertionFrame && insertionFrame->GetType() == nsGkAtoms::legendFrame && aFrame->GetParent()->GetType() == nsGkAtoms::fieldSetFrame) { // When we remove the legend for a fieldset, we should reframe // the fieldset to ensure another legend is used, if there is one *aResult = RecreateFramesForContent(aFrame->GetParent()->GetContent(), false, aFlags, aDestroyedFramesFor); return true; } // Now check for possibly needing to reconstruct due to a pseudo parent nsIFrame* inFlowFrame = (aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) ? GetPlaceholderFrameFor(aFrame) : aFrame; MOZ_ASSERT(inFlowFrame, "How did that happen?"); MOZ_ASSERT(inFlowFrame == inFlowFrame->FirstContinuation(), "placeholder for primary frame has previous continuations?"); nsIFrame* parent = inFlowFrame->GetParent(); // For the case of ruby pseudo parent, effectively, only pseudo rb/rt frame // need to be checked here, since all other types of parent will be catched // by "Check ruby containers" section below. if (IsTableOrRubyPseudo(parent)) { if (FindFirstNonWhitespaceChild(parent) == inFlowFrame || !FindNextNonWhitespaceSibling(inFlowFrame->LastContinuation()) || // If it is a whitespace, and is the only child of the parent, the // pseudo parent was created for the space, and should now be removed. (IsWhitespaceFrame(aFrame) && parent->PrincipalChildList().OnlyChild()) || // If we're a table-column-group, then the OnlyChild check above is // not going to catch cases when we're the first child. (inFlowFrame->GetType() == nsGkAtoms::tableColGroupFrame && parent->GetChildList(nsIFrame::kColGroupList).FirstChild() == inFlowFrame) || // Similar if we're a table-caption. (inFlowFrame->IsTableCaption() && parent->GetChildList(nsIFrame::kCaptionList).FirstChild() == inFlowFrame)) { // We're the first or last frame in the pseudo. Need to reframe. // Good enough to recreate frames for |parent|'s content *aResult = RecreateFramesForContent(parent->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } } // Might need to reconstruct things if this frame's nextSibling is a table // or ruby pseudo, since removal of this frame might mean that this pseudo // needs to get merged with the frame's prevSibling if that's also a table // or ruby pseudo. nsIFrame* nextSibling = FindNextNonWhitespaceSibling(inFlowFrame->LastContinuation()); NS_ASSERTION(!IsTableOrRubyPseudo(inFlowFrame), "Shouldn't happen here"); // Effectively, for the ruby pseudo sibling case, only pseudo frame // need to be checked here, since all other types of such frames will have // a ruby container parent, and be catched by "Check ruby containers" below. if (nextSibling && IsTableOrRubyPseudo(nextSibling)) { nsIFrame* prevSibling = FindPreviousNonWhitespaceSibling(inFlowFrame); if (prevSibling && IsTableOrRubyPseudo(prevSibling)) { #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" has a table pseudo next sibling of different type and a " "table pseudo prevsibling\n"); } #endif // Good enough to recreate frames for aFrame's parent's content; even if // aFrame's parent is a pseudo, that'll be the right content node. *aResult = RecreateFramesForContent(parent->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } } // Check ruby containers nsIAtom* parentType = parent->GetType(); if (parentType == nsGkAtoms::rubyFrame || RubyUtils::IsRubyContainerBox(parentType)) { // In ruby containers, pseudo frames may be created from // whitespaces or even nothing. There are two cases we actually // need to handle here, but hard to check exactly: // 1. Status of spaces beside the frame may vary, and related // frames may be constructed or destroyed accordingly. // 2. The type of the first child of a ruby frame determines // whether a pseudo ruby base container should exist. *aResult = RecreateFramesForContent(parent->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } // Might need to reconstruct things if the removed frame's nextSibling is an // anonymous flex item. The removed frame might've been what divided two // runs of inline content into two anonymous flex items, which would now // need to be merged. // NOTE: It's fine that we've advanced nextSibling past whitespace (up above); // we're only interested in anonymous flex items here, and those can never // be adjacent to whitespace, since they absorb contiguous runs of inline // non-replaced content (including whitespace). if (nextSibling && IsAnonymousFlexOrGridItem(nextSibling)) { AssertAnonymousFlexOrGridItemParent(nextSibling, parent); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" has an anonymous flex item as its next sibling\n"); } #endif // DEBUG // Recreate frames for the flex container (the removed frame's parent) *aResult = RecreateFramesForContent(parent->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } // Might need to reconstruct things if the removed frame's nextSibling is // null and its parent is an anonymous flex item. (This might be the last // remaining child of that anonymous flex item, which can then go away.) if (!nextSibling && IsAnonymousFlexOrGridItem(parent)) { AssertAnonymousFlexOrGridItemParent(parent, parent->GetParent()); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: " "frame="); nsFrame::ListTag(stdout, aFrame); printf(" has an anonymous flex item as its parent\n"); } #endif // DEBUG // Recreate frames for the flex container (the removed frame's grandparent) *aResult = RecreateFramesForContent(parent->GetParent()->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } #ifdef MOZ_XUL if (aFrame->GetType() == nsGkAtoms::popupSetFrame) { nsIRootBox* rootBox = nsIRootBox::GetRootBox(mPresShell); if (rootBox && rootBox->GetPopupSetFrame() == aFrame) { *aResult = ReconstructDocElementHierarchy(); return true; } } #endif // Reconstruct if inflowFrame is parent's only child, and parent is, or has, // a non-fluid continuation, i.e. it was split by bidi resolution if (!inFlowFrame->GetPrevSibling() && !inFlowFrame->GetNextSibling() && ((parent->GetPrevContinuation() && !parent->GetPrevInFlow()) || (parent->GetNextContinuation() && !parent->GetNextInFlow()))) { *aResult = RecreateFramesForContent(parent->GetContent(), true, aFlags, aDestroyedFramesFor); return true; } // We might still need to reconstruct things if the parent of inFlowFrame is // ib-split, since in that case the removal of aFrame might affect the // splitting of its parent. if (!IsFramePartOfIBSplit(parent)) { return false; } // If inFlowFrame is not the only in-flow child of |parent|, then removing // it will change nothing about the {ib} split. if (inFlowFrame != parent->GetFirstPrincipalChild() || inFlowFrame->LastContinuation()->GetNextSibling()) { return false; } // If the parent is the first or last part of the {ib} split, then // removing one of its kids will have no effect on the splitting. // Get the first continuation up front so we don't have to do it twice. nsIFrame* parentFirstContinuation = parent->FirstContinuation(); if (!GetIBSplitSibling(parentFirstContinuation) || !GetIBSplitPrevSibling(parentFirstContinuation)) { return false; } #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::MaybeRecreateContainerForFrameRemoval: " "frame="); nsFrame::ListTag(stdout, parent); printf(" is ib-split\n"); } #endif *aResult = ReframeContainingBlock(parent, aFlags, aDestroyedFramesFor); return true; } nsresult nsCSSFrameConstructor::RecreateFramesForContent(nsIContent* aContent, bool aAsyncInsert, RemoveFlags aFlags, nsIContent** aDestroyedFramesFor) { NS_PRECONDITION(!aAsyncInsert || aContent->IsElement(), "Can only insert elements async"); // If there is no document, we don't want to recreate frames for it. (You // shouldn't generally be giving this method content without a document // anyway). // Rebuilding the frame tree can have bad effects, especially if it's the // frame tree for chrome (see bug 157322). NS_ENSURE_TRUE(aContent->GetCrossShadowCurrentDoc(), NS_ERROR_FAILURE); // Is the frame ib-split? If so, we need to reframe the containing // block *here*, rather than trying to remove and re-insert the // content (which would otherwise result in *two* nested reframe // containing block from ContentRemoved() and ContentInserted(), // below!). We'd really like to optimize away one of those // containing block reframes, hence the code here. nsIFrame* frame = aContent->GetPrimaryFrame(); if (frame && frame->IsFrameOfType(nsIFrame::eMathML)) { // Reframe the topmost MathML element to prevent exponential blowup // (see bug 397518) while (true) { nsIContent* parentContent = aContent->GetParent(); nsIFrame* parentContentFrame = parentContent->GetPrimaryFrame(); if (!parentContentFrame || !parentContentFrame->IsFrameOfType(nsIFrame::eMathML)) break; aContent = parentContent; frame = parentContentFrame; } } if (frame) { nsIFrame* nonGeneratedAncestor = nsLayoutUtils::GetNonGeneratedAncestor(frame); if (nonGeneratedAncestor->GetContent() != aContent) { return RecreateFramesForContent(nonGeneratedAncestor->GetContent(), aAsyncInsert, aFlags, aDestroyedFramesFor); } if (frame->GetStateBits() & NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT) { // Recreate the frames for the entire nsIAnonymousContentCreator tree // since |frame| or one of its descendants may need an nsStyleContext // that associates it to a CSS pseudo-element, and only the // nsIAnonymousContentCreator that created this content knows how to make // that happen. nsIAnonymousContentCreator* acc = nullptr; nsIFrame* ancestor = nsLayoutUtils::GetParentOrPlaceholderFor(frame); while (!(acc = do_QueryFrame(ancestor))) { ancestor = nsLayoutUtils::GetParentOrPlaceholderFor(ancestor); } NS_ASSERTION(acc, "Where is the nsIAnonymousContentCreator? We may fail " "to recreate its content correctly"); // nsSVGUseFrame is special, and we know this is unnecessary for it. if (ancestor->GetType() != nsGkAtoms::svgUseFrame) { NS_ASSERTION(aContent->IsInNativeAnonymousSubtree(), "Why is NS_FRAME_ANONYMOUSCONTENTCREATOR_CONTENT set?"); return RecreateFramesForContent(ancestor->GetContent(), aAsyncInsert, aFlags, aDestroyedFramesFor); } } nsIFrame* parent = frame->GetParent(); nsIContent* parentContent = parent ? parent->GetContent() : nullptr; // If the parent frame is a leaf then the subsequent insert will fail to // create a frame, so we need to recreate the parent content. This happens // with native anonymous content from the editor. if (parent && parent->IsLeaf() && parentContent && parentContent != aContent) { return RecreateFramesForContent(parentContent, aAsyncInsert, aFlags, aDestroyedFramesFor); } } nsresult rv = NS_OK; nsIContent* container; if (frame && MaybeRecreateContainerForFrameRemoval(frame, aFlags, &rv, &container)) { MOZ_ASSERT(container); if (aDestroyedFramesFor) { *aDestroyedFramesFor = container; } return rv; } nsINode* containerNode = aContent->GetParentNode(); // XXXbz how can containerNode be null here? if (containerNode) { // Before removing the frames associated with the content object, // ask them to save their state onto a temporary state object. CaptureStateForFramesOf(aContent, mTempFrameTreeState); // Need the nsIContent parent, which might be null here, since we need to // pass it to ContentInserted and ContentRemoved. nsCOMPtr container = aContent->GetParent(); // Remove the frames associated with the content object. bool didReconstruct; nsIContent* nextSibling = aContent->IsRootOfAnonymousSubtree() ? nullptr : aContent->GetNextSibling(); const bool reconstruct = aFlags != REMOVE_DESTROY_FRAMES; RemoveFlags flags = reconstruct ? REMOVE_FOR_RECONSTRUCTION : aFlags; rv = ContentRemoved(container, aContent, nextSibling, flags, &didReconstruct, aDestroyedFramesFor); if (NS_FAILED(rv)) { return rv; } if (reconstruct && !didReconstruct) { // Now, recreate the frames associated with this content object. If // ContentRemoved triggered reconstruction, then we don't need to do this // because the frames will already have been built. if (aAsyncInsert) { // XXXmats doesn't frame state need to be restored in this case too? RestyleManager()->PostRestyleEvent( aContent->AsElement(), nsRestyleHint(0), nsChangeHint_ReconstructFrame); } else { rv = ContentInserted(container, aContent, mTempFrameTreeState, false); } } } return rv; } void nsCSSFrameConstructor::DestroyFramesFor(nsIContent* aContent, nsIContent** aDestroyedFramesFor) { MOZ_ASSERT(aContent && aContent->GetParentNode()); bool didReconstruct; nsIContent* nextSibling = aContent->IsRootOfAnonymousSubtree() ? nullptr : aContent->GetNextSibling(); ContentRemoved(aContent->GetParent(), aContent, nextSibling, REMOVE_DESTROY_FRAMES, &didReconstruct, aDestroyedFramesFor); } ////////////////////////////////////////////////////////////////////// // Block frame construction code already_AddRefed nsCSSFrameConstructor::GetFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoElementStyle(aContent->AsElement(), nsCSSPseudoElements::ePseudo_firstLetter, aStyleContext, nullptr); } return nullptr; } already_AddRefed nsCSSFrameConstructor::GetFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { if (aContent) { return mPresShell->StyleSet()-> ResolvePseudoElementStyle(aContent->AsElement(), nsCSSPseudoElements::ePseudo_firstLine, aStyleContext, nullptr); } return nullptr; } // Predicate to see if a given content (block element) has // first-letter style applied to it. bool nsCSSFrameConstructor::ShouldHaveFirstLetterStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { return nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::ePseudo_firstLetter, mPresShell->GetPresContext()); } bool nsCSSFrameConstructor::HasFirstLetterStyle(nsIFrame* aBlockFrame) { NS_PRECONDITION(aBlockFrame, "Need a frame"); NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlockFrame), "Not a block frame?"); return (aBlockFrame->GetStateBits() & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0; } bool nsCSSFrameConstructor::ShouldHaveFirstLineStyle(nsIContent* aContent, nsStyleContext* aStyleContext) { bool hasFirstLine = nsLayoutUtils::HasPseudoStyle(aContent, aStyleContext, nsCSSPseudoElements::ePseudo_firstLine, mPresShell->GetPresContext()); if (hasFirstLine) { // But disable for fieldsets int32_t namespaceID; nsIAtom* tag = mDocument->BindingManager()->ResolveTag(aContent, &namespaceID); // This check must match the one in FindHTMLData. hasFirstLine = tag != nsGkAtoms::fieldset || namespaceID != kNameSpaceID_XHTML; } return hasFirstLine; } void nsCSSFrameConstructor::ShouldHaveSpecialBlockStyle(nsIContent* aContent, nsStyleContext* aStyleContext, bool* aHaveFirstLetterStyle, bool* aHaveFirstLineStyle) { *aHaveFirstLetterStyle = ShouldHaveFirstLetterStyle(aContent, aStyleContext); *aHaveFirstLineStyle = ShouldHaveFirstLineStyle(aContent, aStyleContext); } /* static */ const nsCSSFrameConstructor::PseudoParentData nsCSSFrameConstructor::sPseudoParentData[eParentTypeCount] = { { // Cell FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMESET | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRow), &nsCSSFrameConstructor::ConstructTableCell), &nsCSSAnonBoxes::tableCell }, { // Row FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMESET | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRowGroup), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup), &nsCSSAnonBoxes::tableRow }, { // Row group FULL_CTOR_FCDATA(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMESET | FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), &nsCSSFrameConstructor::ConstructTableRowOrRowGroup), &nsCSSAnonBoxes::tableRowGroup }, { // Column group FCDATA_DECL(FCDATA_IS_TABLE_PART | FCDATA_SKIP_FRAMESET | FCDATA_DISALLOW_OUT_OF_FLOW | FCDATA_USE_CHILD_ITEMS | FCDATA_SKIP_ABSPOS_PUSH | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeTable), NS_NewTableColGroupFrame), &nsCSSAnonBoxes::tableColGroup }, { // Table FULL_CTOR_FCDATA(FCDATA_SKIP_FRAMESET | FCDATA_USE_CHILD_ITEMS, &nsCSSFrameConstructor::ConstructTable), &nsCSSAnonBoxes::table }, { // Ruby FCDATA_DECL(FCDATA_IS_LINE_PARTICIPANT | FCDATA_USE_CHILD_ITEMS | FCDATA_SKIP_FRAMESET, NS_NewRubyFrame), &nsCSSAnonBoxes::ruby }, { // Ruby Base FCDATA_DECL(FCDATA_USE_CHILD_ITEMS | FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRubyBaseContainer) | FCDATA_SKIP_FRAMESET, NS_NewRubyBaseFrame), &nsCSSAnonBoxes::rubyBase }, { // Ruby Base Container FCDATA_DECL(FCDATA_USE_CHILD_ITEMS | FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRuby) | FCDATA_SKIP_FRAMESET, NS_NewRubyBaseContainerFrame), &nsCSSAnonBoxes::rubyBaseContainer }, { // Ruby Text FCDATA_DECL(FCDATA_USE_CHILD_ITEMS | FCDATA_IS_LINE_PARTICIPANT | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRubyTextContainer) | FCDATA_SKIP_FRAMESET, NS_NewRubyTextFrame), &nsCSSAnonBoxes::rubyText }, { // Ruby Text Container FCDATA_DECL(FCDATA_USE_CHILD_ITEMS | FCDATA_DESIRED_PARENT_TYPE_TO_BITS(eTypeRuby) | FCDATA_SKIP_FRAMESET, NS_NewRubyTextContainerFrame), &nsCSSAnonBoxes::rubyTextContainer } }; void nsCSSFrameConstructor::CreateNeededAnonFlexOrGridItems( nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsIFrame* aParentFrame) { if (aItems.IsEmpty() || !::IsFlexOrGridContainer(aParentFrame)) { return; } nsIAtom* containerType = aParentFrame->GetType(); FCItemIterator iter(aItems); do { // Advance iter past children that don't want to be wrapped if (iter.SkipItemsThatDontNeedAnonFlexOrGridItem(aState, containerType)) { // Hit the end of the items without finding any remaining children that // need to be wrapped. We're finished! return; } // If our next potentially-wrappable child is whitespace, then see if // there's anything wrappable immediately after it. If not, we just drop // the whitespace and move on. (We're not supposed to create any anonymous // flex/grid items that _only_ contain whitespace). // (BUT if this is generated content, then we don't give whitespace nodes // any special treatment, because they're probably not really whitespace -- // they're just temporarily empty, waiting for their generated text.) // XXXdholbert If this node's generated text will *actually end up being // entirely whitespace*, then we technically should still skip over it, per // the CSS grid & flexbox specs. I'm not bothering with that at this point, // since it's a pretty extreme edge case. if (!aParentFrame->IsGeneratedContentFrame() && iter.item().IsWhitespace(aState)) { FCItemIterator afterWhitespaceIter(iter); bool hitEnd = afterWhitespaceIter.SkipWhitespace(aState); bool nextChildNeedsAnonItem = !hitEnd && afterWhitespaceIter.item().NeedsAnonFlexOrGridItem(aState, containerType); if (!nextChildNeedsAnonItem) { // There's nothing after the whitespace that we need to wrap, so we // just drop this run of whitespace. iter.DeleteItemsTo(afterWhitespaceIter); if (hitEnd) { // Nothing left to do -- we're finished! return; } // else, we have a next child and it does not want to be wrapped. So, // we jump back to the beginning of the loop to skip over that child // (and anything else non-wrappable after it) MOZ_ASSERT(!iter.IsDone() && !iter.item().NeedsAnonFlexOrGridItem(aState, containerType), "hitEnd and/or nextChildNeedsAnonItem lied"); continue; } } // Now |iter| points to the first child that needs to be wrapped in an // anonymous flex/grid item. Now we see how many children after it also want // to be wrapped in an anonymous flex/grid item. FCItemIterator endIter(iter); // iterator to find the end of the group endIter.SkipItemsThatNeedAnonFlexOrGridItem(aState, containerType); NS_ASSERTION(iter != endIter, "Should've had at least one wrappable child to seek past"); // Now, we create the anonymous flex or grid item to contain the children // between |iter| and |endIter|. nsIAtom* pseudoType = containerType == nsGkAtoms::flexContainerFrame ? nsCSSAnonBoxes::anonymousFlexItem : nsCSSAnonBoxes::anonymousGridItem; nsStyleContext* parentStyle = aParentFrame->StyleContext(); nsIContent* parentContent = aParentFrame->GetContent(); already_AddRefed wrapperStyle = mPresShell->StyleSet()->ResolveAnonymousBoxStyle(pseudoType, parentStyle); static const FrameConstructionData sBlockFormattingContextFCData = FCDATA_DECL(FCDATA_SKIP_FRAMESET | FCDATA_USE_CHILD_ITEMS, NS_NewBlockFormattingContext); FrameConstructionItem* newItem = new FrameConstructionItem(&sBlockFormattingContextFCData, // Use the content of our parent frame parentContent, // Lie about the tag; it doesn't matter anyway pseudoType, iter.item().mNameSpaceID, // no pending binding nullptr, wrapperStyle, true, nullptr); newItem->mIsAllInline = newItem->mHasInlineEnds = newItem->mStyleContext->StyleDisplay()->IsInlineOutsideStyle(); newItem->mIsBlock = !newItem->mIsAllInline; MOZ_ASSERT(!newItem->mIsAllInline && newItem->mIsBlock, "expecting anonymous flex/grid items to be block-level " "(this will make a difference when we encounter " "'align-items: baseline')"); // Anonymous flex and grid items induce line boundaries around their // contents. newItem->mChildItems.SetLineBoundaryAtStart(true); newItem->mChildItems.SetLineBoundaryAtEnd(true); // The parent of the items in aItems is also the parent of the items // in mChildItems newItem->mChildItems.SetParentHasNoXBLChildren( aItems.ParentHasNoXBLChildren()); // Eat up all items between |iter| and |endIter| and put them in our // wrapper. This advances |iter| to point to |endIter|. iter.AppendItemsToList(endIter, newItem->mChildItems); iter.InsertItem(newItem); } while (!iter.IsDone()); } /* static */ nsCSSFrameConstructor::RubyWhitespaceType nsCSSFrameConstructor::ComputeRubyWhitespaceType(uint_fast8_t aPrevDisplay, uint_fast8_t aNextDisplay) { MOZ_ASSERT(nsStyleDisplay::IsRubyDisplayType(aPrevDisplay) && nsStyleDisplay::IsRubyDisplayType(aNextDisplay)); if (aPrevDisplay == aNextDisplay && (aPrevDisplay == NS_STYLE_DISPLAY_RUBY_BASE || aPrevDisplay == NS_STYLE_DISPLAY_RUBY_TEXT)) { return eRubyInterLeafWhitespace; } if (aNextDisplay == NS_STYLE_DISPLAY_RUBY_TEXT || aNextDisplay == NS_STYLE_DISPLAY_RUBY_TEXT_CONTAINER) { return eRubyInterLevelWhitespace; } return eRubyInterSegmentWhitespace; } /** * This function checks the content from |aStartIter| to |aEndIter|, * determines whether it contains only whitespace, and if yes, * interprets the type of whitespace. This method does not change * any of the iters. */ /* static */ nsCSSFrameConstructor::RubyWhitespaceType nsCSSFrameConstructor::InterpretRubyWhitespace(nsFrameConstructorState& aState, const FCItemIterator& aStartIter, const FCItemIterator& aEndIter) { if (!aStartIter.item().IsWhitespace(aState)) { return eRubyNotWhitespace; } FCItemIterator spaceEndIter(aStartIter); spaceEndIter.SkipWhitespace(aState); if (spaceEndIter != aEndIter) { return eRubyNotWhitespace; } // Any leading or trailing whitespace in non-pseudo ruby box // should have been trimmed, hence there should not be any // whitespace at the start or the end. MOZ_ASSERT(!aStartIter.AtStart() && !aEndIter.IsDone()); FCItemIterator prevIter(aStartIter); prevIter.Prev(); return ComputeRubyWhitespaceType( prevIter.item().mStyleContext->StyleDisplay()->mDisplay, aEndIter.item().mStyleContext->StyleDisplay()->mDisplay); } /** * This function eats up consecutive items which do not want the current * parent into either a ruby base box or a ruby text box. When it * returns, |aIter| points to the first item it doesn't wrap. */ void nsCSSFrameConstructor::WrapItemsInPseudoRubyLeafBox( FCItemIterator& aIter, nsStyleContext* aParentStyle, nsIContent* aParentContent) { uint_fast8_t parentDisplay = aParentStyle->StyleDisplay()->mDisplay; ParentType parentType, wrapperType; if (parentDisplay == NS_STYLE_DISPLAY_RUBY_TEXT_CONTAINER) { parentType = eTypeRubyTextContainer; wrapperType = eTypeRubyText; } else { MOZ_ASSERT(parentDisplay == NS_STYLE_DISPLAY_RUBY_BASE_CONTAINER); parentType = eTypeRubyBaseContainer; wrapperType = eTypeRubyBase; } MOZ_ASSERT(aIter.item().DesiredParentType() != parentType, "Should point to something needs to be wrapped."); FCItemIterator endIter(aIter); endIter.SkipItemsNotWantingParentType(parentType); WrapItemsInPseudoParent(aParentContent, aParentStyle, wrapperType, aIter, endIter); } /** * This function eats up consecutive items into a ruby level container. * It may create zero or one level container. When it returns, |aIter| * points to the first item it doesn't wrap. */ void nsCSSFrameConstructor::WrapItemsInPseudoRubyLevelContainer( nsFrameConstructorState& aState, FCItemIterator& aIter, nsStyleContext* aParentStyle, nsIContent* aParentContent) { MOZ_ASSERT(aIter.item().DesiredParentType() != eTypeRuby, "Pointing to a level container?"); FrameConstructionItem& firstItem = aIter.item(); ParentType wrapperType = firstItem.DesiredParentType(); if (wrapperType != eTypeRubyTextContainer) { // If the first item is not ruby text, // it should be in a base container. wrapperType = eTypeRubyBaseContainer; } FCItemIterator endIter(aIter); do { if (endIter.SkipItemsWantingParentType(wrapperType) || // If the skipping above stops at some item which wants a // different ruby parent, then we have finished. IsRubyParentType(endIter.item().DesiredParentType())) { // No more items need to be wrapped in this level container. break; } FCItemIterator contentEndIter(endIter); contentEndIter.SkipItemsNotWantingRubyParent(); // endIter must be on something doesn't want a ruby parent. MOZ_ASSERT(contentEndIter != endIter); // InterpretRubyWhitespace depends on the fact that any leading or // trailing whitespace described in the spec have been trimmed at // this point. With this precondition, it is safe not to check // whether contentEndIter has been done. RubyWhitespaceType whitespaceType = InterpretRubyWhitespace(aState, endIter, contentEndIter); if (whitespaceType == eRubyInterLevelWhitespace) { // Remove inter-level whitespace. bool atStart = (aIter == endIter); endIter.DeleteItemsTo(contentEndIter); if (atStart) { aIter = endIter; } } else if (whitespaceType == eRubyInterSegmentWhitespace) { // If this level container starts with inter-segment whitespaces, // wrap them. Break at contentEndIter. Otherwise, leave it here. // Break at endIter. They will be wrapped when we are here again. if (aIter == endIter) { MOZ_ASSERT(wrapperType == eTypeRubyBaseContainer, "Inter-segment whitespace should be wrapped in rbc"); endIter = contentEndIter; } break; } else if (wrapperType == eTypeRubyTextContainer && whitespaceType != eRubyInterLeafWhitespace) { // Misparented inline content that's not inter-annotation // whitespace doesn't belong in a pseudo ruby text container. // Break at endIter. break; } else { endIter = contentEndIter; } } while (!endIter.IsDone()); // It is possible that everything our parent wants us to wrap is // simply an inter-level whitespace, which has been trimmed, or // an inter-segment whitespace, which will be wrapped later. // In those cases, don't create anything. if (aIter != endIter) { WrapItemsInPseudoParent(aParentContent, aParentStyle, wrapperType, aIter, endIter); } } /** * This function trims leading and trailing whitespaces * in the given item list. */ void nsCSSFrameConstructor::TrimLeadingAndTrailingWhitespaces( nsFrameConstructorState& aState, FrameConstructionItemList& aItems) { FCItemIterator iter(aItems); if (!iter.IsDone() && iter.item().IsWhitespace(aState)) { FCItemIterator spaceEndIter(iter); spaceEndIter.SkipWhitespace(aState); iter.DeleteItemsTo(spaceEndIter); } iter.SetToEnd(); if (!iter.AtStart()) { FCItemIterator spaceEndIter(iter); do { iter.Prev(); if (iter.AtStart()) { // It's fine to not check the first item, because we // should have trimmed leading whitespaces above. break; } } while (iter.item().IsWhitespace(aState)); iter.Next(); if (iter != spaceEndIter) { iter.DeleteItemsTo(spaceEndIter); } } } /** * This function walks through the child list (aItems) and creates * needed pseudo ruby boxes to wrap misparented children. */ void nsCSSFrameConstructor::CreateNeededPseudoInternalRubyBoxes( nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsIFrame* aParentFrame) { const ParentType ourParentType = GetParentType(aParentFrame); if (!IsRubyParentType(ourParentType) || aItems.AllWantParentType(ourParentType)) { return; } if (!IsRubyPseudo(aParentFrame)) { // Normally, ruby pseudo frames start from and end at some elements, // which means they don't have leading and trailing whitespaces at // all. But there are two cases where they do actually have leading // or trailing whitespaces: // 1. It is an inter-segment whitespace which in an individual ruby // base container. // 2. The pseudo frame starts from or ends at consecutive inline // content, which is not pure whitespace, but includes some. // In either case, the whitespaces are not the leading or trailing // whitespaces defined in the spec, and thus should not be trimmed. TrimLeadingAndTrailingWhitespaces(aState, aItems); } FCItemIterator iter(aItems); nsIContent* parentContent = aParentFrame->GetContent(); nsStyleContext* parentStyle = aParentFrame->StyleContext(); while (!iter.IsDone()) { if (!iter.SkipItemsWantingParentType(ourParentType)) { if (ourParentType == eTypeRuby) { WrapItemsInPseudoRubyLevelContainer(aState, iter, parentStyle, parentContent); } else { WrapItemsInPseudoRubyLeafBox(iter, parentStyle, parentContent); } } } } /* * This function works as follows: we walk through the child list (aItems) and * find items that cannot have aParentFrame as their parent. We wrap * continuous runs of such items into a FrameConstructionItem for a frame that * gets them closer to their desired parents. For example, a run of non-row * children of a row-group will get wrapped in a row. When we later construct * the frame for this wrapper (in this case for the row), it'll be the correct * parent for the cells in the set of items we wrapped or we'll wrap cells * around everything else. At the end of this method, aItems is guaranteed to * contain only items for frames that can be direct kids of aParentFrame. */ void nsCSSFrameConstructor::CreateNeededPseudoContainers( nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsIFrame* aParentFrame) { ParentType ourParentType = GetParentType(aParentFrame); if (IsRubyParentType(ourParentType) || aItems.AllWantParentType(ourParentType)) { // Nothing to do here return; } FCItemIterator iter(aItems); do { if (iter.SkipItemsWantingParentType(ourParentType)) { // Nothing else to do here; we're finished return; } // Now we're pointing to the first child that wants a different parent // type. // Now try to figure out what kids we can group together. We can generally // group everything that has a different desired parent type from us. Two // exceptions to this: // 1) If our parent type is table, we can't group columns with anything // else other than whitespace. // 2) Whitespace that lies between two things we can group which both want // a non-block parent should be dropped, even if we can't group them // with each other and even if the whitespace wants a parent of // ourParentType. Ends of the list count as things that don't want a // block parent (so that for example we'll drop a whitespace-only list). FCItemIterator endIter(iter); /* iterator to find the end of the group */ ParentType groupingParentType = endIter.item().DesiredParentType(); if (aItems.AllWantParentType(groupingParentType) && groupingParentType != eTypeBlock) { // Just group them all and be done with it. We need the check for // eTypeBlock here to catch the "all the items are whitespace" case // described above. endIter.SetToEnd(); } else { // Locate the end of the group. // Keep track of the type the previous item wanted, in case we have to // deal with whitespace. Start it off with ourParentType, since that's // the last thing |iter| would have skipped over. ParentType prevParentType = ourParentType; do { // Walk an iterator past any whitespace that we might be able to drop // from the list FCItemIterator spaceEndIter(endIter); if (prevParentType != eTypeBlock && !aParentFrame->IsGeneratedContentFrame() && spaceEndIter.item().IsWhitespace(aState)) { bool trailingSpaces = spaceEndIter.SkipWhitespace(aState); // We drop the whitespace in the following cases: // 1) If these are not trailing spaces and the next item wants a table // or table-part parent // 2) If these are trailing spaces and aParentFrame is a // tabular container according to rule 1.3 of CSS 2.1 Sec 17.2.1. // (Being a tabular container pretty much means ourParentType is // not eTypeBlock besides the eTypeColGroup case, which won't // reach here.) if ((!trailingSpaces && IsTableParentType(spaceEndIter.item().DesiredParentType())) || (trailingSpaces && ourParentType != eTypeBlock)) { bool updateStart = (iter == endIter); endIter.DeleteItemsTo(spaceEndIter); NS_ASSERTION(trailingSpaces == endIter.IsDone(), "These should match"); if (updateStart) { iter = endIter; } if (trailingSpaces) { break; /* Found group end */ } if (updateStart) { // Update groupingParentType, since it might have been eTypeBlock // just because of the whitespace. groupingParentType = iter.item().DesiredParentType(); } } } // Now endIter points to a non-whitespace item or a non-droppable // whitespace item. In the latter case, if this is the end of the group // we'll traverse this whitespace again. But it'll all just be quick // DesiredParentType() checks which will match ourParentType (that's // what it means that this is the group end), so it's OK. // However, when we are grouping a ruby parent, and endIter points to // a non-droppable whitespace, if the next non-whitespace item also // wants a ruby parent, the whitespace should also be included into // the current ruby container. prevParentType = endIter.item().DesiredParentType(); if (prevParentType == ourParentType && (endIter == spaceEndIter || spaceEndIter.IsDone() || !IsRubyParentType(groupingParentType) || !IsRubyParentType(spaceEndIter.item().DesiredParentType()))) { // End the group at endIter. break; } if (ourParentType == eTypeTable && (prevParentType == eTypeColGroup) != (groupingParentType == eTypeColGroup)) { // Either we started with columns and now found something else, or vice // versa. In any case, end the grouping. break; } // If we have some whitespace that we were not able to drop and there is // an item after the whitespace that is already properly parented, then // make sure to include the spaces in our group but stop the group after // that. if (spaceEndIter != endIter && !spaceEndIter.IsDone() && ourParentType == spaceEndIter.item().DesiredParentType()) { endIter = spaceEndIter; break; } // Include the whitespace we didn't drop (if any) in the group. endIter = spaceEndIter; prevParentType = endIter.item().DesiredParentType(); endIter.Next(); } while (!endIter.IsDone()); } if (iter == endIter) { // Nothing to wrap here; just skipped some whitespace continue; } // Now group together all the items between iter and endIter. The right // parent type to use depends on ourParentType. ParentType wrapperType; switch (ourParentType) { case eTypeRow: // The parent type for a cell is eTypeBlock, since that's what a cell // looks like to its kids. wrapperType = eTypeBlock; break; case eTypeRowGroup: wrapperType = eTypeRow; break; case eTypeTable: // Either colgroup or rowgroup, depending on what we're grouping. wrapperType = groupingParentType == eTypeColGroup ? eTypeColGroup : eTypeRowGroup; break; case eTypeColGroup: MOZ_CRASH("Colgroups should be suppresing non-col child items"); default: NS_ASSERTION(ourParentType == eTypeBlock, "Unrecognized parent type"); if (IsRubyParentType(groupingParentType)) { wrapperType = eTypeRuby; } else { NS_ASSERTION(IsTableParentType(groupingParentType), "groupingParentType should be either Ruby or table"); wrapperType = eTypeTable; } } nsStyleContext* parentStyle = aParentFrame->StyleContext(); WrapItemsInPseudoParent(aParentFrame->GetContent(), parentStyle, wrapperType, iter, endIter); // Now |iter| points to the item that was the first one we didn't wrap; // loop and see whether we need to skip it or wrap it in something // different. } while (!iter.IsDone()); } /** * This method wraps frame construction item from |aIter| to * |aEndIter|. After it returns, aIter points to the first item * after the wrapper. */ void nsCSSFrameConstructor::WrapItemsInPseudoParent(nsIContent* aParentContent, nsStyleContext* aParentStyle, ParentType aWrapperType, FCItemIterator& aIter, const FCItemIterator& aEndIter) { const PseudoParentData& pseudoData = sPseudoParentData[aWrapperType]; nsIAtom* pseudoType = *pseudoData.mPseudoType; uint8_t parentDisplay = aParentStyle->StyleDisplay()->mDisplay; if (pseudoType == nsCSSAnonBoxes::table && (parentDisplay == NS_STYLE_DISPLAY_INLINE || parentDisplay == NS_STYLE_DISPLAY_RUBY_BASE || parentDisplay == NS_STYLE_DISPLAY_RUBY_TEXT)) { pseudoType = nsCSSAnonBoxes::inlineTable; } already_AddRefed wrapperStyle = mPresShell->StyleSet()->ResolveAnonymousBoxStyle(pseudoType, aParentStyle); FrameConstructionItem* newItem = new FrameConstructionItem(&pseudoData.mFCData, // Use the content of our parent frame aParentContent, // Lie about the tag; it doesn't matter anyway pseudoType, // The namespace does matter, however; it needs // to match that of our first child item to // match the old behavior aIter.item().mNameSpaceID, // no pending binding nullptr, wrapperStyle, true, nullptr); const nsStyleDisplay* disp = newItem->mStyleContext->StyleDisplay(); // Here we're cheating a tad... technically, table-internal items should be // inline if aParentFrame is inline, but they'll get wrapped in an // inline-table in the end, so it'll all work out. In any case, arguably // we don't need to maintain this state at this point... but it's better // to, I guess. newItem->mIsAllInline = newItem->mHasInlineEnds = disp->IsInlineOutsideStyle(); bool isRuby = disp->IsRubyDisplayType(); // All types of ruby frames need a block frame to provide line layout, // hence they are always line participant. newItem->mIsLineParticipant = isRuby; if (!isRuby) { // Table pseudo frames always induce line boundaries around their // contents. newItem->mChildItems.SetLineBoundaryAtStart(true); newItem->mChildItems.SetLineBoundaryAtEnd(true); } // The parent of the items in aItems is also the parent of the items // in mChildItems newItem->mChildItems.SetParentHasNoXBLChildren( aIter.List()->ParentHasNoXBLChildren()); // Eat up all items between |aIter| and |aEndIter| and put them in our // wrapper Advances |aIter| to point to |aEndIter|. aIter.AppendItemsToList(aEndIter, newItem->mChildItems); aIter.InsertItem(newItem); } void nsCSSFrameConstructor::CreateNeededPseudoSiblings( nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsIFrame* aParentFrame) { if (aItems.IsEmpty() || GetParentType(aParentFrame) != eTypeRuby) { return; } FCItemIterator iter(aItems); int firstDisplay = iter.item().mStyleContext->StyleDisplay()->mDisplay; if (firstDisplay == NS_STYLE_DISPLAY_RUBY_BASE_CONTAINER) { return; } NS_ASSERTION(firstDisplay == NS_STYLE_DISPLAY_RUBY_TEXT_CONTAINER, "Child of ruby frame should either a rbc or a rtc"); const PseudoParentData& pseudoData = sPseudoParentData[eTypeRubyBaseContainer]; already_AddRefed pseudoStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(*pseudoData.mPseudoType, aParentFrame->StyleContext()); FrameConstructionItem* newItem = new FrameConstructionItem(&pseudoData.mFCData, // Use the content of the parent frame aParentFrame->GetContent(), // Tag type *pseudoData.mPseudoType, // Use the namespace of the rtc frame iter.item().mNameSpaceID, // no pending binding nullptr, pseudoStyle, true, nullptr); newItem->mIsAllInline = true; newItem->mChildItems.SetParentHasNoXBLChildren(true); iter.InsertItem(newItem); } inline void nsCSSFrameConstructor::ConstructFramesFromItemList(nsFrameConstructorState& aState, FrameConstructionItemList& aItems, nsContainerFrame* aParentFrame, nsFrameItems& aFrameItems) { CreateNeededPseudoContainers(aState, aItems, aParentFrame); CreateNeededAnonFlexOrGridItems(aState, aItems, aParentFrame); CreateNeededPseudoInternalRubyBoxes(aState, aItems, aParentFrame); CreateNeededPseudoSiblings(aState, aItems, aParentFrame); aItems.SetTriedConstructingFrames(); for (FCItemIterator iter(aItems); !iter.IsDone(); iter.Next()) { NS_ASSERTION(iter.item().DesiredParentType() == GetParentType(aParentFrame), "Needed pseudos didn't get created; expect bad things"); ConstructFramesFromItem(aState, iter, aParentFrame, aFrameItems); } NS_ASSERTION(!aState.mHavePendingPopupgroup, "Should have proccessed it by now"); } void nsCSSFrameConstructor::AddFCItemsForAnonymousContent( nsFrameConstructorState& aState, nsContainerFrame* aFrame, nsTArray& aAnonymousItems, FrameConstructionItemList& aItemsToConstruct, uint32_t aExtraFlags) { for (uint32_t i = 0; i < aAnonymousItems.Length(); ++i) { nsIContent* content = aAnonymousItems[i].mContent; #ifdef DEBUG nsIAnonymousContentCreator* creator = do_QueryFrame(aFrame); NS_ASSERTION(!creator || !creator->CreateFrameFor(content), "If you need to use CreateFrameFor, you need to call " "CreateAnonymousFrames manually and not follow the standard " "ProcessChildren() codepath for this frame"); #endif // Assert some things about this content MOZ_ASSERT(!(content->GetFlags() & (NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME)), "Should not be marked as needing frames"); MOZ_ASSERT(!content->IsElement() || !(content->GetFlags() & ELEMENT_ALL_RESTYLE_FLAGS), "Should have no pending restyle flags"); MOZ_ASSERT(!content->GetPrimaryFrame(), "Should have no existing frame"); MOZ_ASSERT(!content->IsNodeOfType(nsINode::eCOMMENT) && !content->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION), "Why is someone creating garbage anonymous content"); RefPtr styleContext; TreeMatchContext::AutoParentDisplayBasedStyleFixupSkipper parentDisplayBasedStyleFixupSkipper(aState.mTreeMatchContext); if (aAnonymousItems[i].mStyleContext) { styleContext = aAnonymousItems[i].mStyleContext.forget(); } else { styleContext = ResolveStyleContext(aFrame, content, &aState); } nsTArray* anonChildren = nullptr; if (!aAnonymousItems[i].mChildren.IsEmpty()) { anonChildren = &aAnonymousItems[i].mChildren; } uint32_t flags = ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK | ITEM_IS_ANONYMOUSCONTENTCREATOR_CONTENT | aExtraFlags; AddFrameConstructionItemsInternal(aState, content, aFrame, content->NodeInfo()->NameAtom(), content->GetNameSpaceID(), true, styleContext, flags, anonChildren, aItemsToConstruct); } } void nsCSSFrameConstructor::ProcessChildren(nsFrameConstructorState& aState, nsIContent* aContent, nsStyleContext* aStyleContext, nsContainerFrame* aFrame, const bool aCanHaveGeneratedContent, nsFrameItems& aFrameItems, const bool aAllowBlockStyles, PendingBinding* aPendingBinding, nsIFrame* aPossiblyLeafFrame) { NS_PRECONDITION(aFrame, "Must have parent frame here"); NS_PRECONDITION(aFrame->GetContentInsertionFrame() == aFrame, "Parent frame in ProcessChildren should be its own " "content insertion frame"); const uint32_t kMaxDepth = 2 * MAX_REFLOW_DEPTH; static_assert(kMaxDepth <= UINT16_MAX, "mCurrentDepth type is too narrow"); AutoRestore savedDepth(mCurrentDepth); if (mCurrentDepth != UINT16_MAX) { ++mCurrentDepth; } if (!aPossiblyLeafFrame) { aPossiblyLeafFrame = aFrame; } // XXXbz ideally, this would do all the pushing of various // containing blocks as needed, so callers don't have to do it... bool haveFirstLetterStyle = false, haveFirstLineStyle = false; if (aAllowBlockStyles) { ShouldHaveSpecialBlockStyle(aContent, aStyleContext, &haveFirstLetterStyle, &haveFirstLineStyle); } // The logic here needs to match the logic in GetFloatContainingBlock() nsFrameConstructorSaveState floatSaveState; if (ShouldSuppressFloatingOfDescendants(aFrame)) { aState.PushFloatContainingBlock(nullptr, floatSaveState); } else if (aFrame->IsFloatContainingBlock()) { aState.PushFloatContainingBlock(aFrame, floatSaveState); } nsFrameConstructorState::PendingBindingAutoPusher pusher(aState, aPendingBinding); FrameConstructionItemList itemsToConstruct; // If we have first-letter or first-line style then frames can get // moved around so don't set these flags. if (aAllowBlockStyles && !haveFirstLetterStyle && !haveFirstLineStyle) { itemsToConstruct.SetLineBoundaryAtStart(true); itemsToConstruct.SetLineBoundaryAtEnd(true); } // Create any anonymous frames we need here. This must happen before the // non-anonymous children are processed to ensure that popups are never // constructed before the popupset. nsAutoTArray anonymousItems; GetAnonymousContent(aContent, aPossiblyLeafFrame, anonymousItems); #ifdef DEBUG for (uint32_t i = 0; i < anonymousItems.Length(); ++i) { MOZ_ASSERT(anonymousItems[i].mContent->IsRootOfAnonymousSubtree(), "Content should know it's an anonymous subtree"); } #endif AddFCItemsForAnonymousContent(aState, aFrame, anonymousItems, itemsToConstruct); if (!aPossiblyLeafFrame->IsLeaf()) { // :before/:after content should have the same style context parent // as normal kids. // Note that we don't use this style context for looking up things like // special block styles because in some cases involving table pseudo-frames // it has nothing to do with the parent frame's desired behavior. nsStyleContext* styleContext; if (aCanHaveGeneratedContent) { aFrame->AddStateBits(NS_FRAME_MAY_HAVE_GENERATED_CONTENT); styleContext = nsFrame::CorrectStyleParentFrame(aFrame, nullptr)->StyleContext(); // Probe for generated content before CreateGeneratedContentItem(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::ePseudo_before, itemsToConstruct); } const bool addChildItems = MOZ_LIKELY(mCurrentDepth < kMaxDepth); if (!addChildItems) { NS_WARNING("ProcessChildren max depth exceeded"); } InsertionPoint insertion(aFrame, nullptr); FlattenedChildIterator iter(aContent); for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) { // Get the parent of the content and check if it is a XBL children element // (if the content is a children element then parent != aContent because the // FlattenedChildIterator will transitively iterate through // for default content). Push the children element as an ancestor here because // it does not have a frame and would not otherwise be pushed as an ancestor. insertion.mContainer = aContent; nsIContent* parent = child->GetParent(); MOZ_ASSERT(parent, "Parent must be non-null because we are iterating children."); TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext); if (parent != aContent && parent->IsElement()) { insertion.mContainer = child->GetFlattenedTreeParent(); MOZ_ASSERT(insertion.mContainer == GetInsertionPoint(parent, child).mContainer); if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { ancestorPusher.PushAncestorAndStyleScope(parent->AsElement()); } else { ancestorPusher.PushStyleScope(parent->AsElement()); } } // Frame construction item construction should not post // restyles, so removing restyle flags here is safe. if (child->IsElement()) { child->UnsetFlags(ELEMENT_ALL_RESTYLE_FLAGS); } if (addChildItems) { AddFrameConstructionItems(aState, child, iter.XBLInvolved(), insertion, itemsToConstruct); } else { ClearLazyBits(child, child->GetNextSibling()); } } itemsToConstruct.SetParentHasNoXBLChildren(!iter.XBLInvolved()); if (aCanHaveGeneratedContent) { // Probe for generated content after CreateGeneratedContentItem(aState, aFrame, aContent, styleContext, nsCSSPseudoElements::ePseudo_after, itemsToConstruct); } } else { ClearLazyBits(aContent->GetFirstChild(), nullptr); } ConstructFramesFromItemList(aState, itemsToConstruct, aFrame, aFrameItems); NS_ASSERTION(!aAllowBlockStyles || !aFrame->IsBoxFrame(), "can't be both block and box"); if (haveFirstLetterStyle) { WrapFramesInFirstLetterFrame(aContent, aFrame, aFrameItems); } if (haveFirstLineStyle) { WrapFramesInFirstLineFrame(aState, aContent, aFrame, nullptr, aFrameItems); } // We might end up with first-line frames that change // AnyKidsNeedBlockParent() without changing itemsToConstruct, but that // should never happen for cases whan aFrame->IsBoxFrame(). NS_ASSERTION(!haveFirstLineStyle || !aFrame->IsBoxFrame(), "Shouldn't have first-line style if we're a box"); NS_ASSERTION(!aFrame->IsBoxFrame() || itemsToConstruct.AnyItemsNeedBlockParent() == (AnyKidsNeedBlockParent(aFrameItems.FirstChild()) != nullptr), "Something went awry in our block parent calculations"); if (aFrame->IsBoxFrame() && itemsToConstruct.AnyItemsNeedBlockParent()) { // XXXbz we could do this on the FrameConstructionItemList level, // no? And if we cared we could look through the item list // instead of groveling through the framelist here.. nsStyleContext *frameStyleContext = aFrame->StyleContext(); // Report a warning for non-GC frames, for chrome: if (!aFrame->IsGeneratedContentFrame() && mPresShell->GetPresContext()->IsChrome()) { nsIContent *badKid = AnyKidsNeedBlockParent(aFrameItems.FirstChild()); nsDependentAtomString parentTag(aContent->NodeInfo()->NameAtom()), kidTag(badKid->NodeInfo()->NameAtom()); const char16_t* params[] = { parentTag.get(), kidTag.get() }; const nsStyleDisplay *display = frameStyleContext->StyleDisplay(); const char *message = (display->mDisplay == NS_STYLE_DISPLAY_INLINE_BOX) ? "NeededToWrapXULInlineBox" : "NeededToWrapXUL"; nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("Layout: FrameConstructor"), mDocument, nsContentUtils::eXUL_PROPERTIES, message, params, ArrayLength(params)); } RefPtr blockSC = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::mozXULAnonymousBlock, frameStyleContext); nsBlockFrame* blockFrame = NS_NewBlockFrame(mPresShell, blockSC); // We might, in theory, want to set NS_BLOCK_FLOAT_MGR and // NS_BLOCK_MARGIN_ROOT, but I think it's a bad idea given that // a real block placed here wouldn't get those set on it. InitAndRestoreFrame(aState, aContent, aFrame, blockFrame, false); NS_ASSERTION(!blockFrame->HasView(), "need to do view reparenting"); ReparentFrames(this, blockFrame, aFrameItems); blockFrame->SetInitialChildList(kPrincipalList, aFrameItems); NS_ASSERTION(aFrameItems.IsEmpty(), "How did that happen?"); aFrameItems.Clear(); aFrameItems.AddChild(blockFrame); aFrame->AddStateBits(NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK); } } //---------------------------------------------------------------------- // Support for :first-line style // Special routine to handle placing a list of frames into a block // frame that has first-line style. The routine ensures that the first // collection of inline frames end up in a first-line frame. // NOTE: aState may have containing block information related to a // different part of the frame tree than where the first line occurs. // In particular aState may be set up for where ContentInserted or // ContentAppended is inserting content, which may be some // non-first-in-flow continuation of the block to which the first-line // belongs. So this function needs to be careful about how it uses // aState. void nsCSSFrameConstructor::WrapFramesInFirstLineFrame( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsContainerFrame* aBlockFrame, nsFirstLineFrame* aLineFrame, nsFrameItems& aFrameItems) { // Find the part of aFrameItems that we want to put in the first-line nsFrameList::FrameLinkEnumerator link(aFrameItems); while (!link.AtEnd() && link.NextFrame()->IsInlineOutside()) { link.Next(); } nsFrameList firstLineChildren = aFrameItems.ExtractHead(link); if (firstLineChildren.IsEmpty()) { // Nothing is supposed to go into the first-line; nothing to do return; } if (!aLineFrame) { // Create line frame nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> StyleContext(); RefPtr firstLineStyle = GetFirstLineStyle(aBlockContent, parentStyle); aLineFrame = NS_NewFirstLineFrame(mPresShell, firstLineStyle); // Initialize the line frame InitAndRestoreFrame(aState, aBlockContent, aBlockFrame, aLineFrame); // The lineFrame will be the block's first child; the rest of the // frame list (after lastInlineFrame) will be the second and // subsequent children; insert lineFrame into aFrameItems. aFrameItems.InsertFrame(nullptr, nullptr, aLineFrame); NS_ASSERTION(aLineFrame->StyleContext() == firstLineStyle, "Bogus style context on line frame"); } // Give the inline frames to the lineFrame after reparenting them ReparentFrames(this, aLineFrame, firstLineChildren); if (aLineFrame->PrincipalChildList().IsEmpty() && (aLineFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW)) { aLineFrame->SetInitialChildList(kPrincipalList, firstLineChildren); } else { AppendFrames(aLineFrame, kPrincipalList, firstLineChildren); } } // Special routine to handle appending a new frame to a block frame's // child list. Takes care of placing the new frame into the right // place when first-line style is present. void nsCSSFrameConstructor::AppendFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aBlockContent, nsContainerFrame* aBlockFrame, nsFrameItems& aFrameItems) { // It's possible that aBlockFrame needs to have a first-line frame // created because it doesn't currently have any children. const nsFrameList& blockKids = aBlockFrame->PrincipalChildList(); if (blockKids.IsEmpty()) { WrapFramesInFirstLineFrame(aState, aBlockContent, aBlockFrame, nullptr, aFrameItems); return; } // Examine the last block child - if it's a first-line frame then // appended frames need special treatment. nsIFrame* lastBlockKid = blockKids.LastChild(); if (lastBlockKid->GetType() != nsGkAtoms::lineFrame) { // No first-line frame at the end of the list, therefore there is // an intervening block between any first-line frame the frames // we are appending. Therefore, we don't need any special // treatment of the appended frames. return; } nsFirstLineFrame* lineFrame = static_cast(lastBlockKid); WrapFramesInFirstLineFrame(aState, aBlockContent, aBlockFrame, lineFrame, aFrameItems); } // Special routine to handle inserting a new frame into a block // frame's child list. Takes care of placing the new frame into the // right place when first-line style is present. nsresult nsCSSFrameConstructor::InsertFirstLineFrames( nsFrameConstructorState& aState, nsIContent* aContent, nsIFrame* aBlockFrame, nsContainerFrame** aParentFrame, nsIFrame* aPrevSibling, nsFrameItems& aFrameItems) { nsresult rv = NS_OK; // XXXbz If you make this method actually do something, check to // make sure that the caller is passing what you expect. In // particular, which content is aContent? And audit the rest of // this code too; it makes bogus assumptions and may not build. #if 0 nsIFrame* parentFrame = *aParentFrame; nsIFrame* newFrame = aFrameItems.childList; bool isInline = IsInlineOutside(newFrame); if (!aPrevSibling) { // Insertion will become the first frame. Two cases: we either // already have a first-line frame or we don't. nsIFrame* firstBlockKid = aBlockFrame->GetFirstPrincipalChild(); if (firstBlockKid->GetType() == nsGkAtoms::lineFrame) { // We already have a first-line frame nsIFrame* lineFrame = firstBlockKid; if (isInline) { // Easy case: the new inline frame will go into the lineFrame. ReparentFrame(this, lineFrame, newFrame); InsertFrames(lineFrame, kPrincipalList, nullptr, newFrame); // Since the frame is going into the lineFrame, don't let it // go into the block too. aFrameItems.childList = nullptr; aFrameItems.lastChild = nullptr; } else { // Harder case: We are about to insert a block level element // before the first-line frame. // XXX need a method to steal away frames from the line-frame } } else { // We do not have a first-line frame if (isInline) { // We now need a first-line frame to contain the inline frame. nsIFrame* lineFrame = NS_NewFirstLineFrame(firstLineStyle); if (NS_SUCCEEDED(rv)) { // Lookup first-line style context nsStyleContext* parentStyle = nsFrame::CorrectStyleParentFrame(aBlockFrame, nsCSSPseudoElements::firstLine)-> StyleContext(); RefPtr firstLineStyle = GetFirstLineStyle(aContent, parentStyle); // Initialize the line frame InitAndRestoreFrame(aState, aContent, aBlockFrame, lineFrame); // Make sure the caller inserts the lineFrame into the // blocks list of children. aFrameItems.childList = lineFrame; aFrameItems.lastChild = lineFrame; // Give the inline frames to the lineFrame after // reparenting them NS_ASSERTION(lineFrame->StyleContext() == firstLineStyle, "Bogus style context on line frame"); ReparentFrame(aPresContext, lineFrame, newFrame); lineFrame->SetInitialChildList(kPrincipalList, newFrame); } } else { // Easy case: the regular insertion logic can insert the new // frame because it's a block frame. } } } else { // Insertion will not be the first frame. nsIFrame* prevSiblingParent = aPrevSibling->GetParent(); if (prevSiblingParent == aBlockFrame) { // Easy case: The prev-siblings parent is the block // frame. Therefore the prev-sibling is not currently in a // line-frame. Therefore the new frame which is going after it, // regardless of type, is not going into a line-frame. } else { // If the prevSiblingParent is not the block-frame then it must // be a line-frame (if it were a letter-frame, that logic would // already have adjusted the prev-sibling to be the // letter-frame). if (isInline) { // Easy case: the insertion can go where the caller thinks it // should go (which is into prevSiblingParent). } else { // Block elements don't end up in line-frames, therefore // change the insertion point to aBlockFrame. However, there // might be more inline elements following aPrevSibling that // need to be pulled out of the line-frame and become children // of the block. nsIFrame* nextSibling = aPrevSibling->GetNextSibling(); nsIFrame* nextLineFrame = prevSiblingParent->GetNextInFlow(); if (nextSibling || nextLineFrame) { // Oy. We have work to do. Create a list of the new frames // that are going into the block by stripping them away from // the line-frame(s). if (nextSibling) { nsLineFrame* lineFrame = (nsLineFrame*) prevSiblingParent; nsFrameList tail = lineFrame->StealFramesAfter(aPrevSibling); // XXX do something with 'tail' } nsLineFrame* nextLineFrame = (nsLineFrame*) lineFrame; for (;;) { nextLineFrame = nextLineFrame->GetNextInFlow(); if (!nextLineFrame) { break; } nsIFrame* kids = nextLineFrame->GetFirstPrincipalChild(); } } else { // We got lucky: aPrevSibling was the last inline frame in // the line-frame. ReparentFrame(this, aBlockFrame, newFrame); InsertFrames(aBlockFrame, kPrincipalList, prevSiblingParent, newFrame); aFrameItems.childList = nullptr; aFrameItems.lastChild = nullptr; } } } } #endif return rv; } //---------------------------------------------------------------------- // First-letter support // Determine how many characters in the text fragment apply to the // first letter static int32_t FirstLetterCount(const nsTextFragment* aFragment) { int32_t count = 0; int32_t firstLetterLength = 0; int32_t i, n = aFragment->GetLength(); for (i = 0; i < n; i++) { char16_t ch = aFragment->CharAt(i); // FIXME: take content language into account when deciding whitespace. if (dom::IsSpaceCharacter(ch)) { if (firstLetterLength) { break; } count++; continue; } // XXX I18n if ((ch == '\'') || (ch == '\"')) { if (firstLetterLength) { break; } // keep looping firstLetterLength = 1; } else { count++; break; } } return count; } static bool NeedFirstLetterContinuation(nsIContent* aContent) { NS_PRECONDITION(aContent, "null ptr"); bool result = false; if (aContent) { const nsTextFragment* frag = aContent->GetText(); if (frag) { int32_t flc = FirstLetterCount(frag); int32_t tl = frag->GetLength(); if (flc < tl) { result = true; } } } return result; } static bool IsFirstLetterContent(nsIContent* aContent) { return aContent->TextLength() && !aContent->TextIsOnlyWhitespace(); } /** * Create a letter frame, only make it a floating frame. */ void nsCSSFrameConstructor::CreateFloatingLetterFrame( nsFrameConstructorState& aState, nsContainerFrame* aBlockFrame, nsIContent* aTextContent, nsIFrame* aTextFrame, nsContainerFrame* aParentFrame, nsStyleContext* aStyleContext, nsFrameItems& aResult) { nsFirstLetterFrame* letterFrame = NS_NewFirstLetterFrame(mPresShell, aStyleContext); // We don't want to use a text content for a non-text frame (because we want // its primary frame to be a text frame). So use its parent for the // first-letter. nsIContent* letterContent = aTextContent->GetParent(); nsContainerFrame* containingBlock = aState.GetGeometricParent( aStyleContext->StyleDisplay(), aParentFrame); InitAndRestoreFrame(aState, letterContent, containingBlock, letterFrame); // Init the text frame to refer to the letter frame. Make sure we // get a proper style context for it (the one passed in is for the // letter frame and will have the float property set on it; the text // frame shouldn't have that set). RefPtr textSC; nsStyleSet* styleSet = mPresShell->StyleSet(); textSC = styleSet->ResolveStyleForNonElement(aStyleContext); aTextFrame->SetStyleContextWithoutNotification(textSC); InitAndRestoreFrame(aState, aTextContent, letterFrame, aTextFrame); // And then give the text frame to the letter frame SetInitialSingleChild(letterFrame, aTextFrame); // See if we will need to continue the text frame (does it contain // more than just the first-letter text or not?) If it does, then we // create (in advance) a continuation frame for it. nsIFrame* nextTextFrame = nullptr; if (NeedFirstLetterContinuation(aTextContent)) { // Create continuation nextTextFrame = CreateContinuingFrame(aState.mPresContext, aTextFrame, aParentFrame); // Repair the continuations style context nsStyleContext* parentStyleContext = aStyleContext->GetParent(); if (parentStyleContext) { RefPtr newSC; newSC = styleSet->ResolveStyleForNonElement(parentStyleContext); nextTextFrame->SetStyleContext(newSC); } } NS_ASSERTION(aResult.IsEmpty(), "aResult should be an empty nsFrameItems!"); // Put the new float before any of the floats in the block we're doing // first-letter for, that is, before any floats whose parent is // containingBlock. nsFrameList::FrameLinkEnumerator link(aState.mFloatedItems); while (!link.AtEnd() && link.NextFrame()->GetParent() != containingBlock) { link.Next(); } aState.AddChild(letterFrame, aResult, letterContent, aStyleContext, aParentFrame, false, true, false, true, link.PrevFrame()); if (nextTextFrame) { aResult.AddChild(nextTextFrame); } } /** * Create a new letter frame for aTextFrame. The letter frame will be * a child of aParentFrame. */ void nsCSSFrameConstructor::CreateLetterFrame(nsContainerFrame* aBlockFrame, nsContainerFrame* aBlockContinuation, nsIContent* aTextContent, nsContainerFrame* aParentFrame, nsFrameItems& aResult) { NS_PRECONDITION(aTextContent->IsNodeOfType(nsINode::eTEXT), "aTextContent isn't text"); NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlockFrame), "Not a block frame?"); // Get style context for the first-letter-frame nsStyleContext* parentStyleContext = nsFrame::CorrectStyleParentFrame(aParentFrame, nsCSSPseudoElements::firstLetter)-> StyleContext(); // Use content from containing block so that we can actually // find a matching style rule. nsIContent* blockContent = aBlockFrame->GetContent(); // Create first-letter style rule RefPtr sc = GetFirstLetterStyle(blockContent, parentStyleContext); if (sc) { RefPtr textSC; textSC = mPresShell->StyleSet()->ResolveStyleForNonElement(sc); // Create a new text frame (the original one will be discarded) // pass a temporary stylecontext, the correct one will be set // later. Start off by unsetting the primary frame for // aTextContent, so it's no longer pointing to the to-be-destroyed // frame. // XXXbz it would be really nice to destroy the old frame _first_, // then create the new one, so we could avoid this hack. aTextContent->SetPrimaryFrame(nullptr); nsIFrame* textFrame = NS_NewTextFrame(mPresShell, textSC); NS_ASSERTION(aBlockContinuation == GetFloatContainingBlock(aParentFrame), "Containing block is confused"); nsFrameConstructorState state(mPresShell, GetAbsoluteContainingBlock(aParentFrame, FIXED_POS), GetAbsoluteContainingBlock(aParentFrame, ABS_POS), aBlockContinuation); // Create the right type of first-letter frame const nsStyleDisplay* display = sc->StyleDisplay(); if (display->IsFloatingStyle() && !aParentFrame->IsSVGText()) { // Make a floating first-letter frame CreateFloatingLetterFrame(state, aBlockFrame, aTextContent, textFrame, aParentFrame, sc, aResult); } else { // Make an inflow first-letter frame nsFirstLetterFrame* letterFrame = NS_NewFirstLetterFrame(mPresShell, sc); // Initialize the first-letter-frame. We don't want to use a text // content for a non-text frame (because we want its primary frame to // be a text frame). So use its parent for the first-letter. nsIContent* letterContent = aTextContent->GetParent(); letterFrame->Init(letterContent, aParentFrame, nullptr); InitAndRestoreFrame(state, aTextContent, letterFrame, textFrame); SetInitialSingleChild(letterFrame, textFrame); aResult.Clear(); aResult.AddChild(letterFrame); NS_ASSERTION(!aBlockFrame->GetPrevContinuation(), "should have the first continuation here"); aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); } aTextContent->SetPrimaryFrame(textFrame); } } void nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsIContent* aBlockContent, nsContainerFrame* aBlockFrame, nsFrameItems& aBlockFrames) { aBlockFrame->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); nsContainerFrame* parentFrame = nullptr; nsIFrame* textFrame = nullptr; nsIFrame* prevFrame = nullptr; nsFrameItems letterFrames; bool stopLooking = false; WrapFramesInFirstLetterFrame(aBlockFrame, aBlockFrame, aBlockFrame, aBlockFrames.FirstChild(), &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (parentFrame) { if (parentFrame == aBlockFrame) { // Take textFrame out of the block's frame list and substitute the // letter frame(s) instead. aBlockFrames.DestroyFrame(textFrame); aBlockFrames.InsertFrames(nullptr, prevFrame, letterFrames); } else { // Take the old textFrame out of the inline parent's child list RemoveFrame(kPrincipalList, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(kPrincipalList, prevFrame, letterFrames); } } } void nsCSSFrameConstructor::WrapFramesInFirstLetterFrame( nsContainerFrame* aBlockFrame, nsContainerFrame* aBlockContinuation, nsContainerFrame* aParentFrame, nsIFrame* aParentFrameList, nsContainerFrame** aModifiedParent, nsIFrame** aTextFrame, nsIFrame** aPrevFrame, nsFrameItems& aLetterFrames, bool* aStopLooking) { nsIFrame* prevFrame = nullptr; nsIFrame* frame = aParentFrameList; while (frame) { nsIFrame* nextFrame = frame->GetNextSibling(); nsIAtom* frameType = frame->GetType(); if (nsGkAtoms::textFrame == frameType) { // Wrap up first-letter content in a letter frame nsIContent* textContent = frame->GetContent(); if (IsFirstLetterContent(textContent)) { // Create letter frame to wrap up the text CreateLetterFrame(aBlockFrame, aBlockContinuation, textContent, aParentFrame, aLetterFrames); // Provide adjustment information for parent *aModifiedParent = aParentFrame; *aTextFrame = frame; *aPrevFrame = prevFrame; *aStopLooking = true; return; } } else if (IsInlineFrame(frame) && frameType != nsGkAtoms::brFrame) { nsIFrame* kids = frame->GetFirstPrincipalChild(); WrapFramesInFirstLetterFrame(aBlockFrame, aBlockContinuation, static_cast(frame), kids, aModifiedParent, aTextFrame, aPrevFrame, aLetterFrames, aStopLooking); if (*aStopLooking) { return; } } else { // This will stop us looking to create more letter frames. For // example, maybe the frame-type is "letterFrame" or // "placeholderFrame". This keeps us from creating extra letter // frames, and also prevents us from creating letter frames when // the first real content child of a block is not text (e.g. an // image, hr, etc.) *aStopLooking = true; break; } prevFrame = frame; frame = nextFrame; } } static nsIFrame* FindFirstLetterFrame(nsIFrame* aFrame, nsIFrame::ChildListID aListID) { nsFrameList list = aFrame->GetChildList(aListID); for (nsFrameList::Enumerator e(list); !e.AtEnd(); e.Next()) { if (nsGkAtoms::letterFrame == e.get()->GetType()) { return e.get(); } } return nullptr; } nsresult nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames( nsIPresShell* aPresShell, nsIFrame* aBlockFrame, bool* aStopLooking) { // Look for the first letter frame on the kFloatList, then kPushedFloatsList. nsIFrame* floatFrame = ::FindFirstLetterFrame(aBlockFrame, nsIFrame::kFloatList); if (!floatFrame) { floatFrame = ::FindFirstLetterFrame(aBlockFrame, nsIFrame::kPushedFloatsList); if (!floatFrame) { return NS_OK; } } // Take the text frame away from the letter frame (so it isn't // destroyed when we destroy the letter frame). nsIFrame* textFrame = floatFrame->GetFirstPrincipalChild(); if (!textFrame) { return NS_OK; } // Discover the placeholder frame for the letter frame nsPlaceholderFrame* placeholderFrame = GetPlaceholderFrameFor(floatFrame); if (!placeholderFrame) { // Somethings really wrong return NS_OK; } nsContainerFrame* parentFrame = placeholderFrame->GetParent(); if (!parentFrame) { // Somethings really wrong return NS_OK; } // Create a new text frame with the right style context that maps // all of the content that was previously part of the letter frame // (and probably continued elsewhere). nsStyleContext* parentSC = parentFrame->StyleContext(); nsIContent* textContent = textFrame->GetContent(); if (!textContent) { return NS_OK; } RefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); nsIFrame* newTextFrame = NS_NewTextFrame(aPresShell, newSC); newTextFrame->Init(textContent, parentFrame, nullptr); // Destroy the old text frame's continuations (the old text frame // will be destroyed when its letter frame is destroyed). nsIFrame* frameToDelete = textFrame->LastContinuation(); while (frameToDelete != textFrame) { nsIFrame* nextFrameToDelete = frameToDelete->GetPrevContinuation(); RemoveFrame(kPrincipalList, frameToDelete); frameToDelete = nextFrameToDelete; } nsIFrame* prevSibling = placeholderFrame->GetPrevSibling(); // Now that everything is set... #ifdef NOISY_FIRST_LETTER printf("RemoveFloatingFirstLetterFrames: textContent=%p oldTextFrame=%p newTextFrame=%p\n", textContent.get(), textFrame, newTextFrame); #endif // Remove placeholder frame and the float RemoveFrame(kPrincipalList, placeholderFrame); // Now that the old frames are gone, we can start pointing to our // new primary frame. textContent->SetPrimaryFrame(newTextFrame); // Wallpaper bug 822910. bool offsetsNeedFixing = prevSibling && prevSibling->GetType() == nsGkAtoms::textFrame; if (offsetsNeedFixing) { prevSibling->AddStateBits(TEXT_OFFSETS_NEED_FIXING); } // Insert text frame in its place nsFrameList textList(newTextFrame, newTextFrame); InsertFrames(parentFrame, kPrincipalList, prevSibling, textList); if (offsetsNeedFixing) { prevSibling->RemoveStateBits(TEXT_OFFSETS_NEED_FIXING); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveFirstLetterFrames(nsIPresShell* aPresShell, nsContainerFrame* aFrame, nsContainerFrame* aBlockFrame, bool* aStopLooking) { nsIFrame* prevSibling = nullptr; nsIFrame* kid = aFrame->GetFirstPrincipalChild(); while (kid) { if (nsGkAtoms::letterFrame == kid->GetType()) { // Bingo. Found it. First steal away the text frame. nsIFrame* textFrame = kid->GetFirstPrincipalChild(); if (!textFrame) { break; } // Create a new textframe nsStyleContext* parentSC = aFrame->StyleContext(); if (!parentSC) { break; } nsIContent* textContent = textFrame->GetContent(); if (!textContent) { break; } RefPtr newSC; newSC = aPresShell->StyleSet()->ResolveStyleForNonElement(parentSC); textFrame = NS_NewTextFrame(aPresShell, newSC); textFrame->Init(textContent, aFrame, nullptr); // Next rip out the kid and replace it with the text frame RemoveFrame(kPrincipalList, kid); // Now that the old frames are gone, we can start pointing to our // new primary frame. textContent->SetPrimaryFrame(textFrame); // Wallpaper bug 822910. bool offsetsNeedFixing = prevSibling && prevSibling->GetType() == nsGkAtoms::textFrame; if (offsetsNeedFixing) { prevSibling->AddStateBits(TEXT_OFFSETS_NEED_FIXING); } // Insert text frame in its place nsFrameList textList(textFrame, textFrame); InsertFrames(aFrame, kPrincipalList, prevSibling, textList); if (offsetsNeedFixing) { prevSibling->RemoveStateBits(TEXT_OFFSETS_NEED_FIXING); } *aStopLooking = true; NS_ASSERTION(!aBlockFrame->GetPrevContinuation(), "should have the first continuation here"); aBlockFrame->RemoveStateBits(NS_BLOCK_HAS_FIRST_LETTER_CHILD); break; } else if (IsInlineFrame(kid)) { nsContainerFrame* kidAsContainerFrame = do_QueryFrame(kid); if (kidAsContainerFrame) { // Look inside child inline frame for the letter frame. RemoveFirstLetterFrames(aPresShell, kidAsContainerFrame, aBlockFrame, aStopLooking); if (*aStopLooking) { break; } } } prevSibling = kid; kid = kid->GetNextSibling(); } return NS_OK; } nsresult nsCSSFrameConstructor::RemoveLetterFrames(nsIPresShell* aPresShell, nsContainerFrame* aBlockFrame) { aBlockFrame = static_cast(aBlockFrame->FirstContinuation()); nsContainerFrame* continuation = aBlockFrame; bool stopLooking = false; nsresult rv; do { rv = RemoveFloatingFirstLetterFrames(aPresShell, continuation, &stopLooking); if (NS_SUCCEEDED(rv) && !stopLooking) { rv = RemoveFirstLetterFrames(aPresShell, continuation, aBlockFrame, &stopLooking); } if (stopLooking) { break; } continuation = static_cast(continuation->GetNextContinuation()); } while (continuation); return rv; } // Fixup the letter frame situation for the given block void nsCSSFrameConstructor::RecoverLetterFrames(nsContainerFrame* aBlockFrame) { aBlockFrame = static_cast(aBlockFrame->FirstContinuation()); nsContainerFrame* continuation = aBlockFrame; nsContainerFrame* parentFrame = nullptr; nsIFrame* textFrame = nullptr; nsIFrame* prevFrame = nullptr; nsFrameItems letterFrames; bool stopLooking = false; do { // XXX shouldn't this bit be set already (bug 408493), assert instead? continuation->AddStateBits(NS_BLOCK_HAS_FIRST_LETTER_STYLE); WrapFramesInFirstLetterFrame(aBlockFrame, continuation, continuation, continuation->GetFirstPrincipalChild(), &parentFrame, &textFrame, &prevFrame, letterFrames, &stopLooking); if (stopLooking) { break; } continuation = static_cast(continuation->GetNextContinuation()); } while (continuation); if (parentFrame) { // Take the old textFrame out of the parents child list RemoveFrame(kPrincipalList, textFrame); // Insert in the letter frame(s) parentFrame->InsertFrames(kPrincipalList, prevFrame, letterFrames); } } //---------------------------------------------------------------------- // listbox Widget Routines nsresult nsCSSFrameConstructor::CreateListBoxContent(nsContainerFrame* aParentFrame, nsIFrame* aPrevFrame, nsIContent* aChild, nsIFrame** aNewFrame, bool aIsAppend, bool aIsScrollbar, nsILayoutHistoryState* aFrameState) { #ifdef MOZ_XUL nsresult rv = NS_OK; // Construct a new frame if (nullptr != aParentFrame) { nsFrameItems frameItems; nsFrameConstructorState state(mPresShell, GetAbsoluteContainingBlock(aParentFrame, FIXED_POS), GetAbsoluteContainingBlock(aParentFrame, ABS_POS), GetFloatContainingBlock(aParentFrame), do_AddRef(mTempFrameTreeState.get())); // If we ever initialize the ancestor filter on |state|, make sure // to push the right parent! RefPtr styleContext; styleContext = ResolveStyleContext(aParentFrame, aChild, &state); // Pre-check for display "none" - only if we find that, do we create // any frame at all const nsStyleDisplay* display = styleContext->StyleDisplay(); if (NS_STYLE_DISPLAY_NONE == display->mDisplay) { *aNewFrame = nullptr; return NS_OK; } BeginUpdate(); FrameConstructionItemList items; AddFrameConstructionItemsInternal(state, aChild, aParentFrame, aChild->NodeInfo()->NameAtom(), aChild->GetNameSpaceID(), true, styleContext, ITEM_ALLOW_XBL_BASE, nullptr, items); ConstructFramesFromItemList(state, items, aParentFrame, frameItems); nsIFrame* newFrame = frameItems.FirstChild(); *aNewFrame = newFrame; if (newFrame) { // Notify the parent frame if (aIsAppend) rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxAppendFrames(frameItems); else rv = ((nsListBoxBodyFrame*)aParentFrame)->ListBoxInsertFrames(aPrevFrame, frameItems); } EndUpdate(); #ifdef ACCESSIBILITY if (newFrame) { nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { accService->ContentRangeInserted(mPresShell, aChild->GetParent(), aChild, aChild->GetNextSibling()); } } #endif } return rv; #else return NS_ERROR_FAILURE; #endif } //---------------------------------------- void nsCSSFrameConstructor::ConstructBlock(nsFrameConstructorState& aState, const nsStyleDisplay* aDisplay, nsIContent* aContent, nsContainerFrame* aParentFrame, nsContainerFrame* aContentParentFrame, nsStyleContext* aStyleContext, nsContainerFrame** aNewFrame, nsFrameItems& aFrameItems, nsIFrame* aPositionedFrameForAbsPosContainer, PendingBinding* aPendingBinding) { // Create column wrapper if necessary nsContainerFrame* blockFrame = *aNewFrame; NS_ASSERTION(blockFrame->GetType() == nsGkAtoms::blockFrame, "not a block frame?"); nsContainerFrame* parent = aParentFrame; RefPtr blockStyle = aStyleContext; const nsStyleColumn* columns = aStyleContext->StyleColumn(); if (columns->mColumnCount != NS_STYLE_COLUMN_COUNT_AUTO || columns->mColumnWidth.GetUnit() != eStyleUnit_Auto) { nsContainerFrame* columnSetFrame = NS_NewColumnSetFrame(mPresShell, aStyleContext, nsFrameState(0)); InitAndRestoreFrame(aState, aContent, aParentFrame, columnSetFrame); blockStyle = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(nsCSSAnonBoxes::columnContent, aStyleContext); parent = columnSetFrame; *aNewFrame = columnSetFrame; if (aPositionedFrameForAbsPosContainer == blockFrame) { aPositionedFrameForAbsPosContainer = columnSetFrame; } SetInitialSingleChild(columnSetFrame, blockFrame); } blockFrame->SetStyleContextWithoutNotification(blockStyle); InitAndRestoreFrame(aState, aContent, parent, blockFrame); aState.AddChild(*aNewFrame, aFrameItems, aContent, aStyleContext, aContentParentFrame ? aContentParentFrame : aParentFrame); if (!mRootElementFrame) { // The frame we're constructing will be the root element frame. // Set mRootElementFrame before processing children. mRootElementFrame = *aNewFrame; } // We should make the outer frame be the absolute containing block, // if one is required. We have to do this because absolute // positioning must be computed with respect to the CSS dimensions // of the element, which are the dimensions of the outer block. But // we can't really do that because only blocks can have absolute // children. So use the block and try to compensate with hacks // in nsBlockFrame::CalculateContainingBlockSizeForAbsolutes. nsFrameConstructorSaveState absoluteSaveState; (*aNewFrame)->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); if (aPositionedFrameForAbsPosContainer) { // NS_ASSERTION(aRelPos, "should have made area frame for this"); aState.PushAbsoluteContainingBlock(*aNewFrame, aPositionedFrameForAbsPosContainer, absoluteSaveState); } // Process the child content nsFrameItems childItems; ProcessChildren(aState, aContent, aStyleContext, blockFrame, true, childItems, true, aPendingBinding); // Set the frame's initial child list blockFrame->SetInitialChildList(kPrincipalList, childItems); } nsIFrame* nsCSSFrameConstructor::ConstructInline(nsFrameConstructorState& aState, FrameConstructionItem& aItem, nsContainerFrame* aParentFrame, const nsStyleDisplay* aDisplay, nsFrameItems& aFrameItems) { // If an inline frame has non-inline kids, then we chop up the child list // into runs of blocks and runs of inlines, create anonymous block frames to // contain the runs of blocks, inline frames with our style context for the // runs of inlines, and put all these frames, in order, into aFrameItems. We // return the the first one. The whole setup is called an {ib} // split; in what follows "frames in the split" refers to the anonymous blocks // and inlines that contain our children. // // {ib} splits maintain the following invariants: // 1) All frames in the split have the NS_FRAME_PART_OF_IBSPLIT bit // set. // 2) Each frame in the split has the nsIFrame::IBSplitSibling // property pointing to the next frame in the split, except for the last // one, which does not have it set. // 3) Each frame in the split has the nsIFrame::IBSplitPrevSibling // property pointing to the previous frame in the split, except for the // first one, which does not have it set. // 4) The first and last frame in the split are always inlines. // // An invariant that is NOT maintained is that the wrappers are actually // linked via GetNextSibling linkage. A simple example is an inline // containing an inline that contains a block. The three parts of the inner // inline end up with three different parents. // // For example, this HTML: // //
a
// // b //
c
// // d //
e
// f // // Gives the following frame tree: // // Inline (outer span) // Block (anonymous, outer span) // Block (div) // Text("a") // Inline (outer span) // Inline (inner span) // Text("b") // Block (anonymous, outer span) // Block (anonymous, inner span) // Block (div) // Text("c") // Inline (outer span) // Inline (inner span) // Text("d") // Block (anonymous, outer span) // Block (div) // Text("e") // Inline (outer span) // Text("f") nsIContent* const content = aItem.mContent; nsStyleContext* const styleContext = aItem.mStyleContext; bool positioned = NS_STYLE_DISPLAY_INLINE == aDisplay->mDisplay && aDisplay->IsRelativelyPositionedStyle() && !aParentFrame->IsSVGText(); nsInlineFrame* newFrame = NS_NewInlineFrame(mPresShell, styleContext); // Initialize the frame InitAndRestoreFrame(aState, content, aParentFrame, newFrame); // Inline frames can always have generated content newFrame->AddStateBits(NS_FRAME_MAY_HAVE_GENERATED_CONTENT); nsFrameConstructorSaveState absoluteSaveState; // definition cannot be inside next block // because the object's destructor is significant // this is part of the fix for bug 42372 newFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); if (positioned) { // Relatively positioned frames becomes a container for child // frames that are positioned aState.PushAbsoluteContainingBlock(newFrame, newFrame, absoluteSaveState); } // Process the child content nsFrameItems childItems; ConstructFramesFromItemList(aState, aItem.mChildItems, newFrame, childItems); nsFrameList::FrameLinkEnumerator firstBlockEnumerator(childItems); if (!aItem.mIsAllInline) { FindFirstBlock(firstBlockEnumerator); } if (aItem.mIsAllInline || firstBlockEnumerator.AtEnd()) { // This part is easy. We either already know we have no non-inline kids, // or haven't found any when constructing actual frames (the latter can // happen only if out-of-flows that we thought had no containing block // acquired one when ancestor inline frames and {ib} splits got // constructed). Just put all the kids into the single inline frame and // bail. newFrame->SetInitialChildList(kPrincipalList, childItems); aState.AddChild(newFrame, aFrameItems, content, styleContext, aParentFrame); return newFrame; } // This inline frame contains several types of children. Therefore this frame // has to be chopped into several pieces, as described above. // Grab the first inline's kids nsFrameList firstInlineKids = childItems.ExtractHead(firstBlockEnumerator); newFrame->SetInitialChildList(kPrincipalList, firstInlineKids); aFrameItems.AddChild(newFrame); CreateIBSiblings(aState, newFrame, positioned, childItems, aFrameItems); return newFrame; } void nsCSSFrameConstructor::CreateIBSiblings(nsFrameConstructorState& aState, nsContainerFrame* aInitialInline, bool aIsPositioned, nsFrameItems& aChildItems, nsFrameItems& aSiblings) { nsIContent* content = aInitialInline->GetContent(); nsStyleContext* styleContext = aInitialInline->StyleContext(); nsContainerFrame* parentFrame = aInitialInline->GetParent(); // Resolve the right style context for our anonymous blocks. // The distinction in styles is needed because of CSS 2.1, section // 9.2.1.1, which says: // When such an inline box is affected by relative positioning, any // resulting translation also affects the block-level box contained // in the inline box. RefPtr blockSC = mPresShell->StyleSet()-> ResolveAnonymousBoxStyle(aIsPositioned ? nsCSSAnonBoxes::mozAnonymousPositionedBlock : nsCSSAnonBoxes::mozAnonymousBlock, styleContext); nsContainerFrame* lastNewInline = static_cast(aInitialInline->FirstContinuation()); do { // On entry to this loop aChildItems is not empty and the first frame in it // is block-level. NS_PRECONDITION(aChildItems.NotEmpty(), "Should have child items"); NS_PRECONDITION(!aChildItems.FirstChild()->IsInlineOutside(), "Must have list starting with block"); // The initial run of blocks belongs to an anonymous block that we create // right now. The anonymous block will be the parent of these block // children of the inline. nsBlockFrame* blockFrame = NS_NewBlockFrame(mPresShell, blockSC); InitAndRestoreFrame(aState, content, parentFrame, blockFrame, false); // Find the first non-block child which defines the end of our block kids // and the start of our next inline's kids nsFrameList::FrameLinkEnumerator firstNonBlock = FindFirstNonBlock(aChildItems); nsFrameList blockKids = aChildItems.ExtractHead(firstNonBlock); MoveChildrenTo(aInitialInline, blockFrame, blockKids); SetFrameIsIBSplit(lastNewInline, blockFrame); aSiblings.AddChild(blockFrame); // Now grab the initial inlines in aChildItems and put them into an inline // frame. nsInlineFrame* inlineFrame = NS_NewInlineFrame(mPresShell, styleContext); InitAndRestoreFrame(aState, content, parentFrame, inlineFrame, false); inlineFrame->AddStateBits(NS_FRAME_MAY_HAVE_GENERATED_CONTENT | NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN); if (aIsPositioned) { inlineFrame->MarkAsAbsoluteContainingBlock(); } if (aChildItems.NotEmpty()) { nsFrameList::FrameLinkEnumerator firstBlock(aChildItems); FindFirstBlock(firstBlock); nsFrameList inlineKids = aChildItems.ExtractHead(firstBlock); MoveChildrenTo(aInitialInline, inlineFrame, inlineKids); } SetFrameIsIBSplit(blockFrame, inlineFrame); aSiblings.AddChild(inlineFrame); lastNewInline = inlineFrame; } while (aChildItems.NotEmpty()); SetFrameIsIBSplit(lastNewInline, nullptr); } void nsCSSFrameConstructor::BuildInlineChildItems(nsFrameConstructorState& aState, FrameConstructionItem& aParentItem, bool aItemIsWithinSVGText, bool aItemAllowsTextPathChild) { // XXXbz should we preallocate aParentItem.mChildItems to some sane // length? Maybe even to parentContent->GetChildCount()? nsFrameConstructorState::PendingBindingAutoPusher pusher(aState, aParentItem.mPendingBinding); nsStyleContext* const parentStyleContext = aParentItem.mStyleContext; nsIContent* const parentContent = aParentItem.mContent; TreeMatchContext::AutoAncestorPusher ancestorPusher(aState.mTreeMatchContext); if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { ancestorPusher.PushAncestorAndStyleScope(parentContent->AsElement()); } else { ancestorPusher.PushStyleScope(parentContent->AsElement()); } if (!aItemIsWithinSVGText) { // Probe for generated content before CreateGeneratedContentItem(aState, nullptr, parentContent, parentStyleContext, nsCSSPseudoElements::ePseudo_before, aParentItem.mChildItems); } uint32_t flags = ITEM_ALLOW_XBL_BASE | ITEM_ALLOW_PAGE_BREAK; if (aItemIsWithinSVGText) { flags |= ITEM_IS_WITHIN_SVG_TEXT; } if (aItemAllowsTextPathChild && aParentItem.mIsForSVGAElement) { flags |= ITEM_ALLOWS_TEXT_PATH_CHILD; } if (!aParentItem.mAnonChildren.IsEmpty()) { // Use the anon-children list instead of the content tree child list so // that we use any special style context that should be associated with // the children, and so that we won't try to construct grandchildren frame // constructor items before the frame is available for their parent. AddFCItemsForAnonymousContent(aState, nullptr, aParentItem.mAnonChildren, aParentItem.mChildItems, flags); } else { // Use the content tree child list: FlattenedChildIterator iter(parentContent); for (nsIContent* content = iter.GetNextChild(); content; content = iter.GetNextChild()) { // Get the parent of the content and check if it is a XBL children element // (if the content is a children element then contentParent != parentContent because the // FlattenedChildIterator will transitively iterate through // for default content). Push the children element as an ancestor here because // it does not have a frame and would not otherwise be pushed as an ancestor. nsIContent* contentParent = content->GetParent(); MOZ_ASSERT(contentParent, "Parent must be non-null because we are iterating children."); TreeMatchContext::AutoAncestorPusher insertionPointPusher(aState.mTreeMatchContext); if (contentParent != parentContent && contentParent->IsElement()) { if (aState.mTreeMatchContext.mAncestorFilter.HasFilter()) { insertionPointPusher.PushAncestorAndStyleScope(contentParent->AsElement()); } else { insertionPointPusher.PushStyleScope(contentParent->AsElement()); } } // Manually check for comments/PIs, since we don't have a frame to pass to // AddFrameConstructionItems. We know our parent is a non-replaced inline, // so there is no need to do the NeedFrameFor check. content->UnsetFlags(NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME); if (content->IsNodeOfType(nsINode::eCOMMENT) || content->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) { continue; } if (content->IsElement()) { // See comment explaining why we need to remove the "is possible // restyle root" flags in AddFrameConstructionItems. But note // that we can remove all restyle flags, just like in // ProcessChildren and for the same reason. content->UnsetFlags(ELEMENT_ALL_RESTYLE_FLAGS); } RefPtr childContext = ResolveStyleContext(parentStyleContext, content, &aState); AddFrameConstructionItemsInternal(aState, content, nullptr, content->NodeInfo()->NameAtom(), content->GetNameSpaceID(), iter.XBLInvolved(), childContext, flags, nullptr, aParentItem.mChildItems); } } if (!aItemIsWithinSVGText) { // Probe for generated content after CreateGeneratedContentItem(aState, nullptr, parentContent, parentStyleContext, nsCSSPseudoElements::ePseudo_after, aParentItem.mChildItems); } aParentItem.mIsAllInline = aParentItem.mChildItems.AreAllItemsInline(); } // return whether it's ok to append (in the AppendFrames sense) to // aParentFrame if our nextSibling is aNextSibling. aParentFrame must // be an ib-split inline. static bool IsSafeToAppendToIBSplitInline(nsIFrame* aParentFrame, nsIFrame* aNextSibling) { NS_PRECONDITION(IsInlineFrame(aParentFrame), "Must have an inline parent here"); do { NS_ASSERTION(IsFramePartOfIBSplit(aParentFrame), "How is this not part of an ib-split?"); if (aNextSibling || aParentFrame->GetNextContinuation() || GetIBSplitSibling(aParentFrame)) { return false; } aNextSibling = aParentFrame->GetNextSibling(); aParentFrame = aParentFrame->GetParent(); } while (IsInlineFrame(aParentFrame)); return true; } bool nsCSSFrameConstructor::WipeContainingBlock(nsFrameConstructorState& aState, nsIFrame* aContainingBlock, nsIFrame* aFrame, FrameConstructionItemList& aItems, bool aIsAppend, nsIFrame* aPrevSibling) { if (aItems.IsEmpty()) { return false; } // Before we go and append the frames, we must check for several // special situations. // Situation #1 is a XUL frame that contains frames that are required // to be wrapped in blocks. if (aFrame->IsBoxFrame() && !(aFrame->GetStateBits() & NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK) && aItems.AnyItemsNeedBlockParent()) { RecreateFramesForContent(aFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } nsIFrame* nextSibling = ::GetInsertNextSibling(aFrame, aPrevSibling); // Situation #2 is a flex or grid container frame into which we're inserting // new inline non-replaced children, adjacent to an existing anonymous // flex or grid item. if (::IsFlexOrGridContainer(aFrame)) { FCItemIterator iter(aItems); // Check if we're adding to-be-wrapped content right *after* an existing // anonymous flex or grid item (which would need to absorb this content). nsIAtom* containerType = aFrame->GetType(); if (aPrevSibling && IsAnonymousFlexOrGridItem(aPrevSibling) && iter.item().NeedsAnonFlexOrGridItem(aState, containerType)) { RecreateFramesForContent(aFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } // Check if we're adding to-be-wrapped content right *before* an existing // anonymous flex or grid item (which would need to absorb this content). if (nextSibling && IsAnonymousFlexOrGridItem(nextSibling)) { // Jump to the last entry in the list iter.SetToEnd(); iter.Prev(); if (iter.item().NeedsAnonFlexOrGridItem(aState, containerType)) { RecreateFramesForContent(aFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } } } // Situation #3 is an anonymous flex or grid item that's getting new children // who don't want to be wrapped. if (IsAnonymousFlexOrGridItem(aFrame)) { AssertAnonymousFlexOrGridItemParent(aFrame, aFrame->GetParent()); // We need to push a null float containing block to be sure that // "NeedsAnonFlexOrGridItem" will know we're not honoring floats for this // inserted content. (In particular, this is necessary in order for // its "GetGeometricParent" call to return the correct result.) // We're not honoring floats on this content because it has the // _flex/grid container_ as its parent in the content tree. nsFrameConstructorSaveState floatSaveState; aState.PushFloatContainingBlock(nullptr, floatSaveState); FCItemIterator iter(aItems); // Skip over things that _do_ need an anonymous flex item, because // they're perfectly happy to go here -- they won't cause a reframe. nsIFrame* containerFrame = aFrame->GetParent(); if (!iter.SkipItemsThatNeedAnonFlexOrGridItem(aState, containerFrame->GetType())) { // We hit something that _doesn't_ need an anonymous flex item! // Rebuild the flex container to bust it out. RecreateFramesForContent(containerFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } // If we get here, then everything in |aItems| needs to be wrapped in // an anonymous flex or grid item. That's where it's already going - good! } // Situation #4 is a ruby-related frame that's getting new children. // The situation for ruby is complex, especially when interacting with // spaces. It containes these two special cases apart from tables: // 1) There are effectively three types of white spaces in ruby frames // we handle differently: leading/tailing/inter-level space, // inter-base/inter-annotation space, and inter-segment space. // These three types of spaces can be converted to each other when // their sibling changes. // 2) The first effective child of a ruby frame must always be a ruby // base container. It should be created or destroyed accordingly. nsIAtom* frameType = aFrame->GetType(); if (IsRubyPseudo(aFrame) || frameType == nsGkAtoms::rubyFrame || RubyUtils::IsRubyContainerBox(frameType)) { // We want to optimize it better, and avoid reframing as much as // possible. But given the cases above, and the fact that a ruby // usually won't be very large, it should be fine to reframe it. RecreateFramesForContent(aFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } // Situation #5 is a case when table pseudo-frames don't work out right ParentType parentType = GetParentType(aFrame); // If all the kids want a parent of the type that aFrame is, then we're all // set to go. Indeed, there won't be any table pseudo-frames created between // aFrame and the kids, so those won't need to be merged with any table // pseudo-frames that might already be kids of aFrame. If aFrame itself is a // table pseudo-frame, then all the kids in this list would have wanted a // frame of that type wrapping them anyway, so putting them inside it is ok. if (!aItems.AllWantParentType(parentType)) { // Don't give up yet. If parentType is not eTypeBlock and the parent is // not a generated content frame, then try filtering whitespace out of the // list. if (parentType != eTypeBlock && !aFrame->IsGeneratedContentFrame()) { // For leading whitespace followed by a kid that wants our parent type, // there are four cases: // 1) We have a previous sibling which is not a table pseudo. That means // that previous sibling wanted a (non-block) parent of the type we're // looking at. Then the whitespace comes between two table-internal // elements, so should be collapsed out. // 2) We have a previous sibling which is a table pseudo. It might have // kids who want this whitespace, so we need to reframe. // 3) We have no previous sibling and our parent frame is not a table // pseudo. That means that we'll be at the beginning of our actual // non-block-type parent, and the whitespace is OK to collapse out. // If something is ever inserted before us, it'll find our own parent // as its parent and if it's something that would care about the // whitespace it'll want a block parent, so it'll trigger a reframe at // that point. // 4) We have no previous sibling and our parent frame is a table pseudo. // Need to reframe. // All that is predicated on finding the correct previous sibling. We // might have to walk backwards along continuations from aFrame to do so. // // It's always OK to drop whitespace between any two items that want a // parent of type parentType. // // For trailing whitespace preceded by a kid that wants our parent type, // there are four cases: // 1) We have a next sibling which is not a table pseudo. That means // that next sibling wanted a (non-block) parent of the type we're // looking at. Then the whitespace comes between two table-internal // elements, so should be collapsed out. // 2) We have a next sibling which is a table pseudo. It might have // kids who want this whitespace, so we need to reframe. // 3) We have no next sibling and our parent frame is not a table // pseudo. That means that we'll be at the end of our actual // non-block-type parent, and the whitespace is OK to collapse out. // If something is ever inserted after us, it'll find our own parent // as its parent and if it's something that would care about the // whitespace it'll want a block parent, so it'll trigger a reframe at // that point. // 4) We have no next sibling and our parent frame is a table pseudo. // Need to reframe. // All that is predicated on finding the correct next sibling. We might // have to walk forward along continuations from aFrame to do so. That // said, in the case when nextSibling is null at this point and aIsAppend // is true, we know we're in case 3. Furthermore, in that case we don't // even have to worry about the table pseudo situation; we know our // parent is not a table pseudo there. FCItemIterator iter(aItems); FCItemIterator start(iter); do { if (iter.SkipItemsWantingParentType(parentType)) { break; } // iter points to an item that wants a different parent. If it's not // whitespace, we're done; no more point scanning the list. if (!iter.item().IsWhitespace(aState)) { break; } if (iter == start) { // Leading whitespace. How to handle this depends on our // previous sibling and aFrame. See the long comment above. nsIFrame* prevSibling = aPrevSibling; if (!prevSibling) { // Try to find one after all nsIFrame* parentPrevCont = aFrame->GetPrevContinuation(); while (parentPrevCont) { prevSibling = parentPrevCont->GetChildList(kPrincipalList).LastChild(); if (prevSibling) { break; } parentPrevCont = parentPrevCont->GetPrevContinuation(); } }; if (prevSibling) { if (IsTablePseudo(prevSibling)) { // need to reframe break; } } else if (IsTablePseudo(aFrame)) { // need to reframe break; } } FCItemIterator spaceEndIter(iter); // Advance spaceEndIter past any whitespace bool trailingSpaces = spaceEndIter.SkipWhitespace(aState); bool okToDrop; if (trailingSpaces) { // Trailing whitespace. How to handle this depeds on aIsAppend, our // next sibling and aFrame. See the long comment above. okToDrop = aIsAppend && !nextSibling; if (!okToDrop) { if (!nextSibling) { // Try to find one after all nsIFrame* parentNextCont = aFrame->GetNextContinuation(); while (parentNextCont) { nextSibling = parentNextCont->GetFirstPrincipalChild(); if (nextSibling) { break; } parentNextCont = parentNextCont->GetNextContinuation(); } } okToDrop = (nextSibling && !IsTablePseudo(nextSibling)) || (!nextSibling && !IsTablePseudo(aFrame)); } #ifdef DEBUG else { NS_ASSERTION(!IsTablePseudo(aFrame), "How did that happen?"); } #endif } else { okToDrop = (spaceEndIter.item().DesiredParentType() == parentType); } if (okToDrop) { iter.DeleteItemsTo(spaceEndIter); } else { // We're done: we don't want to drop the whitespace, and it has the // wrong parent type. break; } // Now loop, since |iter| points to item right after the whitespace we // removed. } while (!iter.IsDone()); } // We might be able to figure out some sort of optimizations here, but they // would have to depend on having a correct aPrevSibling and a correct next // sibling. For example, we can probably avoid reframing if none of // aFrame, aPrevSibling, and next sibling are table pseudo-frames. But it // doesn't seem worth it to worry about that for now, especially since we // in fact do not have a reliable aPrevSibling, nor any next sibling, in // this method. // aItems might have changed, so recheck the parent type thing. In fact, // it might be empty, so recheck that too. if (aItems.IsEmpty()) { return false; } if (!aItems.AllWantParentType(parentType)) { // Reframing aFrame->GetContent() is good enough, since the content of // table pseudo-frames is the ancestor content. RecreateFramesForContent(aFrame->GetContent(), true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } } // Now we have several cases involving {ib} splits. Put them all in a // do/while with breaks to take us to the "go and reconstruct" code. do { if (IsInlineFrame(aFrame)) { if (aItems.AreAllItemsInline()) { // We can just put the kids in. return false; } if (!IsFramePartOfIBSplit(aFrame)) { // Need to go ahead and reconstruct. break; } // Now we're adding kids including some blocks to an inline part of an // {ib} split. If we plan to call AppendFrames, and don't have a next // sibling for the new frames, and our parent is the last continuation of // the last part of the {ib} split, and the same is true of all our // ancestor inlines (they have no following continuations and they're the // last part of their {ib} splits and we'd be adding to the end for all // of them), then AppendFrames will handle things for us. Bail out in // that case. if (aIsAppend && IsSafeToAppendToIBSplitInline(aFrame, nextSibling)) { return false; } // Need to reconstruct. break; } // Now we know we have a block parent. If it's not part of an // ib-split, we're all set. if (!IsFramePartOfIBSplit(aFrame)) { return false; } // We're adding some kids to a block part of an {ib} split. If all the // kids are blocks, we don't need to reconstruct. if (aItems.AreAllItemsBlock()) { return false; } // We might have some inline kids for this block. Just fall out of the // loop and reconstruct. } while (0); // If we don't have a containing block, start with aFrame and look for one. if (!aContainingBlock) { aContainingBlock = aFrame; } // To find the right block to reframe, just walk up the tree until we find a // frame that is: // 1) Not part of an IB split // 2) Not a pseudo-frame // 3) Not an inline frame // We're guaranteed to find one, since nsStyleContext::ApplyStyleFixups // enforces that the root is display:none, display:table, or display:block. // Note that walking up "too far" is OK in terms of correctness, even if it // might be a little inefficient. This is why we walk out of all // pseudo-frames -- telling which ones are or are not OK to walk out of is // too hard (and I suspect that we do in fact need to walk out of all of // them). while (IsFramePartOfIBSplit(aContainingBlock) || aContainingBlock->IsInlineOutside() || aContainingBlock->StyleContext()->GetPseudo()) { aContainingBlock = aContainingBlock->GetParent(); NS_ASSERTION(aContainingBlock, "Must have non-inline, non-ib-split, non-pseudo frame as " "root (or child of root, for a table root)!"); } // Tell parent of the containing block to reformulate the // entire block. This is painful and definitely not optimal // but it will *always* get the right answer. nsIContent *blockContent = aContainingBlock->GetContent(); #ifdef DEBUG if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::WipeContainingBlock: blockContent=%p\n", static_cast(blockContent)); } #endif RecreateFramesForContent(blockContent, true, REMOVE_FOR_RECONSTRUCTION, nullptr); return true; } nsresult nsCSSFrameConstructor::ReframeContainingBlock(nsIFrame* aFrame, RemoveFlags aFlags, nsIContent** aDestroyedFramesFor) { #ifdef DEBUG // ReframeContainingBlock is a NASTY routine, it causes terrible performance problems // so I want to see when it is happening! Unfortunately, it is happening way to often because // so much content on the web causes block-in-inline frame situations and we handle them // very poorly if (gNoisyContentUpdates) { printf("nsCSSFrameConstructor::ReframeContainingBlock frame=%p\n", static_cast(aFrame)); } #endif // XXXbz how exactly would we get here while isReflowing anyway? Should this // whole test be ifdef DEBUG? if (mPresShell->IsReflowLocked()) { // don't ReframeContainingBlock, this will result in a crash // if we remove a tree that's in reflow - see bug 121368 for testcase NS_ERROR("Atemptted to nsCSSFrameConstructor::ReframeContainingBlock during a Reflow!!!"); return NS_OK; } // Get the first "normal" ancestor of the target frame. nsIFrame* containingBlock = GetIBContainingBlockFor(aFrame); if (containingBlock) { // From here we look for the containing block in case the target // frame is already a block (which can happen when an inline frame // wraps some of its content in an anonymous block; see // ConstructInline) // NOTE: We used to get the FloatContainingBlock here, but it was often wrong. // GetIBContainingBlock works much better and provides the correct container in all cases // so GetFloatContainingBlock(aFrame) has been removed // And get the containingBlock's content nsCOMPtr blockContent = containingBlock->GetContent(); if (blockContent) { #ifdef DEBUG if (gNoisyContentUpdates) { printf(" ==> blockContent=%p\n", static_cast(blockContent)); } #endif return RecreateFramesForContent(blockContent, true, aFlags, aDestroyedFramesFor); } } // If we get here, we're screwed! return RecreateFramesForContent(mPresShell->GetDocument()->GetRootElement(), true, aFlags, nullptr); } nsresult nsCSSFrameConstructor::GenerateChildFrames(nsContainerFrame* aFrame) { { nsAutoScriptBlocker scriptBlocker; BeginUpdate(); nsFrameItems childItems; nsFrameConstructorState state(mPresShell, nullptr, nullptr, nullptr); // We don't have a parent frame with a pending binding constructor here, // so no need to worry about ordering of the kids' constructors with it. // Pass null for the PendingBinding. ProcessChildren(state, aFrame->GetContent(), aFrame->StyleContext(), aFrame, false, childItems, false, nullptr); aFrame->SetInitialChildList(kPrincipalList, childItems); EndUpdate(); } #ifdef ACCESSIBILITY nsAccessibilityService* accService = nsIPresShell::AccService(); if (accService) { nsIContent* container = aFrame->GetContent(); nsIContent* child = container->GetFirstChild(); if (child) { accService->ContentRangeInserted(mPresShell, container, child, nullptr); } } #endif // call XBL constructors after the frames are created mPresShell->GetDocument()->BindingManager()->ProcessAttachedQueue(); return NS_OK; } ////////////////////////////////////////////////////////// // nsCSSFrameConstructor::FrameConstructionItem methods // ////////////////////////////////////////////////////////// bool nsCSSFrameConstructor:: FrameConstructionItem::IsWhitespace(nsFrameConstructorState& aState) const { NS_PRECONDITION(aState.mCreatingExtraFrames || !mContent->GetPrimaryFrame(), "How did that happen?"); if (!mIsText) { return false; } mContent->SetFlags(NS_CREATE_FRAME_IF_NON_WHITESPACE | NS_REFRAME_IF_WHITESPACE); return mContent->TextIsOnlyWhitespace(); } ////////////////////////////////////////////////////////////// // nsCSSFrameConstructor::FrameConstructionItemList methods // ////////////////////////////////////////////////////////////// void nsCSSFrameConstructor::FrameConstructionItemList:: AdjustCountsForItem(FrameConstructionItem* aItem, int32_t aDelta) { NS_PRECONDITION(aDelta == 1 || aDelta == -1, "Unexpected delta"); mItemCount += aDelta; if (aItem->mIsAllInline) { mInlineCount += aDelta; } if (aItem->mIsBlock) { mBlockCount += aDelta; } if (aItem->mIsLineParticipant) { mLineParticipantCount += aDelta; } mDesiredParentCounts[aItem->DesiredParentType()] += aDelta; } //////////////////////////////////////////////////////////////////////// // nsCSSFrameConstructor::FrameConstructionItemList::Iterator methods // //////////////////////////////////////////////////////////////////////// inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipItemsWantingParentType(ParentType aParentType) { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); while (item().DesiredParentType() == aParentType) { Next(); if (IsDone()) { return true; } } return false; } inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipItemsNotWantingParentType(ParentType aParentType) { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); while (item().DesiredParentType() != aParentType) { Next(); if (IsDone()) { return true; } } return false; } bool nsCSSFrameConstructor::FrameConstructionItem:: NeedsAnonFlexOrGridItem(const nsFrameConstructorState& aState, nsIAtom* aContainerType) { if (mFCData->mBits & FCDATA_IS_LINE_PARTICIPANT) { // This will be an inline non-replaced box. return true; } // Bug 874718: Flex containers still wrap placeholders; Grid containers don't. if (aContainerType == nsGkAtoms::flexContainerFrame && !(mFCData->mBits & FCDATA_DISALLOW_OUT_OF_FLOW) && aState.GetGeometricParent(mStyleContext->StyleDisplay(), nullptr)) { // We're abspos or fixedpos, which means we'll spawn a placeholder which // we'll need to wrap in an anonymous flex item. So, we just treat // _this_ frame as if _it_ needs to be wrapped in an anonymous flex item, // and then when we spawn the placeholder, it'll end up in the right spot. return true; } return false; } inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipItemsThatNeedAnonFlexOrGridItem( const nsFrameConstructorState& aState, nsIAtom* aContainerType) { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); while (item().NeedsAnonFlexOrGridItem(aState, aContainerType)) { Next(); if (IsDone()) { return true; } } return false; } inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipItemsThatDontNeedAnonFlexOrGridItem( const nsFrameConstructorState& aState, nsIAtom* aContainerType) { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); while (!(item().NeedsAnonFlexOrGridItem(aState, aContainerType))) { Next(); if (IsDone()) { return true; } } return false; } inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipItemsNotWantingRubyParent() { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); while (!IsRubyParentType(item().DesiredParentType())) { Next(); if (IsDone()) { return true; } } return false; } inline bool nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::SkipWhitespace(nsFrameConstructorState& aState) { NS_PRECONDITION(!IsDone(), "Shouldn't be done yet"); NS_PRECONDITION(item().IsWhitespace(aState), "Not pointing to whitespace?"); do { Next(); if (IsDone()) { return true; } } while (item().IsWhitespace(aState)); return false; } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::AppendItemToList(FrameConstructionItemList& aTargetList) { NS_ASSERTION(&aTargetList != &mList, "Unexpected call"); NS_PRECONDITION(!IsDone(), "should not be done"); FrameConstructionItem* item = ToItem(mCurrent); Next(); PR_REMOVE_LINK(item); PR_APPEND_LINK(item, &aTargetList.mItems); mList.AdjustCountsForItem(item, -1); aTargetList.AdjustCountsForItem(item, 1); } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::AppendItemsToList(const Iterator& aEnd, FrameConstructionItemList& aTargetList) { NS_ASSERTION(&aTargetList != &mList, "Unexpected call"); NS_PRECONDITION(mEnd == aEnd.mEnd, "end iterator for some other list?"); // We can't just move our guts to the other list if it already has // some information or if we're not moving our entire list. if (!AtStart() || !aEnd.IsDone() || !aTargetList.IsEmpty() || !aTargetList.mUndisplayedItems.IsEmpty()) { do { AppendItemToList(aTargetList); } while (*this != aEnd); return; } // move over the list of items PR_INSERT_AFTER(&aTargetList.mItems, &mList.mItems); // Need to init when we remove to makd ~FrameConstructionItemList work right. PR_REMOVE_AND_INIT_LINK(&mList.mItems); // Copy over the various counters aTargetList.mInlineCount = mList.mInlineCount; aTargetList.mBlockCount = mList.mBlockCount; aTargetList.mLineParticipantCount = mList.mLineParticipantCount; aTargetList.mItemCount = mList.mItemCount; memcpy(aTargetList.mDesiredParentCounts, mList.mDesiredParentCounts, sizeof(aTargetList.mDesiredParentCounts)); // Swap out undisplayed item arrays, before we nuke the array on our end aTargetList.mUndisplayedItems.SwapElements(mList.mUndisplayedItems); // reset mList mList.~FrameConstructionItemList(); new (&mList) FrameConstructionItemList(); // Point ourselves to aEnd, as advertised mCurrent = mEnd = &mList.mItems; NS_POSTCONDITION(*this == aEnd, "How did that happen?"); } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::InsertItem(FrameConstructionItem* aItem) { // Just insert the item before us. There's no magic here. PR_INSERT_BEFORE(aItem, mCurrent); mList.AdjustCountsForItem(aItem, 1); NS_POSTCONDITION(PR_NEXT_LINK(aItem) == mCurrent, "How did that happen?"); } void nsCSSFrameConstructor::FrameConstructionItemList:: Iterator::DeleteItemsTo(const Iterator& aEnd) { NS_PRECONDITION(mEnd == aEnd.mEnd, "end iterator for some other list?"); NS_PRECONDITION(*this != aEnd, "Shouldn't be at aEnd yet"); do { NS_ASSERTION(!IsDone(), "Ran off end of list?"); FrameConstructionItem* item = ToItem(mCurrent); Next(); PR_REMOVE_LINK(item); mList.AdjustCountsForItem(item, -1); delete item; } while (*this != aEnd); }