mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
586 lines
20 KiB
C++
586 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Main header first:
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#include "nsSVGForeignObjectFrame.h"
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// Keep others in (case-insensitive) order:
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#include "gfxContext.h"
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#include "nsGkAtoms.h"
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#include "nsNameSpaceManager.h"
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#include "nsLayoutUtils.h"
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#include "nsRegion.h"
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#include "nsRenderingContext.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGEffects.h"
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#include "mozilla/dom/SVGForeignObjectElement.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGOuterSVGFrame.h"
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#include "nsSVGUtils.h"
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#include "mozilla/AutoRestore.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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//----------------------------------------------------------------------
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// Implementation
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nsContainerFrame*
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NS_NewSVGForeignObjectFrame(nsIPresShell *aPresShell,
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nsStyleContext *aContext)
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{
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return new (aPresShell) nsSVGForeignObjectFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGForeignObjectFrame)
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nsSVGForeignObjectFrame::nsSVGForeignObjectFrame(nsStyleContext* aContext)
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: nsSVGForeignObjectFrameBase(aContext),
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mInReflow(false)
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{
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AddStateBits(NS_FRAME_REFLOW_ROOT | NS_FRAME_MAY_BE_TRANSFORMED |
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NS_FRAME_SVG_LAYOUT);
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}
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//----------------------------------------------------------------------
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// nsIFrame methods
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NS_QUERYFRAME_HEAD(nsSVGForeignObjectFrame)
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NS_QUERYFRAME_ENTRY(nsISVGChildFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsSVGForeignObjectFrameBase)
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void
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nsSVGForeignObjectFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::foreignObject),
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"Content is not an SVG foreignObject!");
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nsSVGForeignObjectFrameBase::Init(aContent, aParent, aPrevInFlow);
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AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD);
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AddStateBits(NS_FRAME_FONT_INFLATION_CONTAINER |
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NS_FRAME_FONT_INFLATION_FLOW_ROOT);
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if (!(mState & NS_FRAME_IS_NONDISPLAY)) {
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nsSVGUtils::GetOuterSVGFrame(this)->RegisterForeignObject(this);
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}
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}
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void nsSVGForeignObjectFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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// Only unregister if we registered in the first place:
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if (!(mState & NS_FRAME_IS_NONDISPLAY)) {
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nsSVGUtils::GetOuterSVGFrame(this)->UnregisterForeignObject(this);
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}
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nsSVGForeignObjectFrameBase::DestroyFrom(aDestructRoot);
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}
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nsIAtom *
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nsSVGForeignObjectFrame::GetType() const
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{
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return nsGkAtoms::svgForeignObjectFrame;
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}
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nsresult
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nsSVGForeignObjectFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom *aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::width ||
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aAttribute == nsGkAtoms::height) {
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nsLayoutUtils::PostRestyleEvent(
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mContent->AsElement(), nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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// XXXjwatt: why mark intrinsic widths dirty? can't we just use eResize?
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RequestReflow(nsIPresShell::eStyleChange);
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} else if (aAttribute == nsGkAtoms::x ||
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aAttribute == nsGkAtoms::y) {
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// make sure our cached transform matrix gets (lazily) updated
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mCanvasTM = nullptr;
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nsLayoutUtils::PostRestyleEvent(
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mContent->AsElement(), nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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} else if (aAttribute == nsGkAtoms::transform) {
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// We don't invalidate for transform changes (the layers code does that).
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// Also note that SVGTransformableElement::GetAttributeChangeHint will
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// return nsChangeHint_UpdateOverflow for "transform" attribute changes
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// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
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mCanvasTM = nullptr;
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} else if (aAttribute == nsGkAtoms::viewBox ||
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aAttribute == nsGkAtoms::preserveAspectRatio) {
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nsLayoutUtils::PostRestyleEvent(
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mContent->AsElement(), nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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}
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}
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return NS_OK;
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}
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void
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nsSVGForeignObjectFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"Should not have been called");
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// Only InvalidateAndScheduleBoundsUpdate marks us with NS_FRAME_IS_DIRTY,
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// so if that bit is still set we still have a resize pending. If we hit
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// this assertion, then we should get the presShell to skip reflow roots
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// that have a dirty parent since a reflow is going to come via the
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// reflow root's parent anyway.
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NS_ASSERTION(!(GetStateBits() & NS_FRAME_IS_DIRTY),
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"Reflowing while a resize is pending is wasteful");
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// ReflowSVG makes sure mRect is up to date before we're called.
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NS_ASSERTION(!aReflowState.parentReflowState,
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"should only get reflow from being reflow root");
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NS_ASSERTION(aReflowState.ComputedWidth() == GetSize().width &&
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aReflowState.ComputedHeight() == GetSize().height,
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"reflow roots should be reflowed at existing size and "
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"svg.css should ensure we have no padding/border/margin");
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DoReflow();
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WritingMode wm = aReflowState.GetWritingMode();
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LogicalSize finalSize(wm, aReflowState.ComputedISize(),
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aReflowState.ComputedBSize());
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aDesiredSize.SetSize(wm, finalSize);
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aDesiredSize.SetOverflowAreasToDesiredBounds();
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aStatus = NS_FRAME_COMPLETE;
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}
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void
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nsSVGForeignObjectFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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if (!static_cast<const nsSVGElement*>(mContent)->HasValidDimensions()) {
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return;
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}
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BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, aLists);
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}
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bool
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nsSVGForeignObjectFrame::IsSVGTransformed(Matrix *aOwnTransform,
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Matrix *aFromParentTransform) const
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{
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bool foundTransform = false;
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// Check if our parent has children-only transforms:
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nsIFrame *parent = GetParent();
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if (parent &&
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parent->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer)) {
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foundTransform = static_cast<nsSVGContainerFrame*>(parent)->
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HasChildrenOnlyTransform(aFromParentTransform);
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}
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nsSVGElement *content = static_cast<nsSVGElement*>(mContent);
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nsSVGAnimatedTransformList* transformList =
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content->GetAnimatedTransformList();
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if ((transformList && transformList->HasTransform()) ||
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content->GetAnimateMotionTransform()) {
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if (aOwnTransform) {
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*aOwnTransform = gfx::ToMatrix(content->PrependLocalTransformsTo(
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gfxMatrix(),
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eUserSpaceToParent));
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}
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foundTransform = true;
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}
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return foundTransform;
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}
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nsresult
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nsSVGForeignObjectFrame::PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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const nsIntRect* aDirtyRect)
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{
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NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"If display lists are enabled, only painting of non-display "
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"SVG should take this code path");
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if (IsDisabled())
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return NS_OK;
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nsIFrame* kid = GetFirstPrincipalChild();
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if (!kid)
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return NS_OK;
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if (aTransform.IsSingular()) {
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NS_WARNING("Can't render foreignObject element!");
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return NS_ERROR_FAILURE;
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}
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nsRect kidDirtyRect = kid->GetVisualOverflowRect();
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/* Check if we need to draw anything. */
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if (aDirtyRect) {
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NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"Display lists handle dirty rect intersection test");
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// Transform the dirty rect into app units in our userspace.
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gfxMatrix invmatrix = aTransform;
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DebugOnly<bool> ok = invmatrix.Invert();
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NS_ASSERTION(ok, "inverse of non-singular matrix should be non-singular");
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gfxRect transDirtyRect = gfxRect(aDirtyRect->x, aDirtyRect->y,
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aDirtyRect->width, aDirtyRect->height);
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transDirtyRect = invmatrix.TransformBounds(transDirtyRect);
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kidDirtyRect.IntersectRect(kidDirtyRect,
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nsLayoutUtils::RoundGfxRectToAppRect(transDirtyRect,
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PresContext()->AppUnitsPerCSSPixel()));
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// XXX after bug 614732 is fixed, we will compare mRect with aDirtyRect,
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// not with kidDirtyRect. I.e.
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// int32_t appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
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// mRect.ToOutsidePixels(appUnitsPerDevPx).Intersects(*aDirtyRect)
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if (kidDirtyRect.IsEmpty())
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return NS_OK;
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}
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aContext.Save();
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if (StyleDisplay()->IsScrollableOverflow()) {
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float x, y, width, height;
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static_cast<nsSVGElement*>(mContent)->
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GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
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gfxRect clipRect =
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nsSVGUtils::GetClipRectForFrame(this, 0.0f, 0.0f, width, height);
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nsSVGUtils::SetClipRect(&aContext, aTransform, clipRect);
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}
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// SVG paints in CSS px, but normally frames paint in dev pixels. Here we
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// multiply a CSS-px-to-dev-pixel factor onto aTransform so our children
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// paint correctly.
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float cssPxPerDevPx = PresContext()->
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AppUnitsToFloatCSSPixels(PresContext()->AppUnitsPerDevPixel());
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gfxMatrix canvasTMForChildren = aTransform;
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canvasTMForChildren.Scale(cssPxPerDevPx, cssPxPerDevPx);
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aContext.Multiply(canvasTMForChildren);
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uint32_t flags = nsLayoutUtils::PAINT_IN_TRANSFORM;
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if (SVGAutoRenderState::IsPaintingToWindow(aContext.GetDrawTarget())) {
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flags |= nsLayoutUtils::PAINT_TO_WINDOW;
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}
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nsRenderingContext rendCtx(&aContext);
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nsresult rv = nsLayoutUtils::PaintFrame(&rendCtx, kid, nsRegion(kidDirtyRect),
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NS_RGBA(0,0,0,0), flags);
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aContext.Restore();
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return rv;
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}
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nsIFrame*
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nsSVGForeignObjectFrame::GetFrameForPoint(const gfxPoint& aPoint)
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{
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NS_ASSERTION(!NS_SVGDisplayListHitTestingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"If display lists are enabled, only hit-testing of a "
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"clipPath's contents should take this code path");
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if (IsDisabled() || (GetStateBits() & NS_FRAME_IS_NONDISPLAY))
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return nullptr;
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nsIFrame* kid = GetFirstPrincipalChild();
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if (!kid)
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return nullptr;
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float x, y, width, height;
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static_cast<nsSVGElement*>(mContent)->
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GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
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if (!gfxRect(x, y, width, height).Contains(aPoint) ||
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!nsSVGUtils::HitTestClip(this, aPoint)) {
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return nullptr;
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}
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// Convert the point to app units relative to the top-left corner of the
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// viewport that's established by the foreignObject element:
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gfxPoint pt = (aPoint + gfxPoint(x, y)) * nsPresContext::AppUnitsPerCSSPixel();
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nsPoint point = nsPoint(NSToIntRound(pt.x), NSToIntRound(pt.y));
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return nsLayoutUtils::GetFrameForPoint(kid, point);
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}
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nsRect
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nsSVGForeignObjectFrame::GetCoveredRegion()
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{
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float x, y, w, h;
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static_cast<SVGForeignObjectElement*>(mContent)->
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GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
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if (w < 0.0f) w = 0.0f;
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if (h < 0.0f) h = 0.0f;
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// GetCanvasTM includes the x,y translation
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return nsSVGUtils::ToCanvasBounds(gfxRect(0.0, 0.0, w, h),
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GetCanvasTM(),
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PresContext());
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}
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void
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nsSVGForeignObjectFrame::ReflowSVG()
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{
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NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
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"This call is probably a wasteful mistake");
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MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"ReflowSVG mechanism not designed for this");
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if (!nsSVGUtils::NeedsReflowSVG(this)) {
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return;
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}
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// We update mRect before the DoReflow call so that DoReflow uses the
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// correct dimensions:
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float x, y, w, h;
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static_cast<SVGForeignObjectElement*>(mContent)->
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GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
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// If mRect's width or height are negative, reflow blows up! We must clamp!
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if (w < 0.0f) w = 0.0f;
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if (h < 0.0f) h = 0.0f;
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mRect = nsLayoutUtils::RoundGfxRectToAppRect(
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gfxRect(x, y, w, h),
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PresContext()->AppUnitsPerCSSPixel());
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// Fully mark our kid dirty so that it gets resized if necessary
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// (NS_FRAME_HAS_DIRTY_CHILDREN isn't enough in that case):
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nsIFrame* kid = GetFirstPrincipalChild();
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kid->AddStateBits(NS_FRAME_IS_DIRTY);
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// Make sure to not allow interrupts if we're not being reflown as a root:
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nsPresContext::InterruptPreventer noInterrupts(PresContext());
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DoReflow();
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if (mState & NS_FRAME_FIRST_REFLOW) {
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// Make sure we have our filter property (if any) before calling
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// FinishAndStoreOverflow (subsequent filter changes are handled off
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// nsChangeHint_UpdateEffects):
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nsSVGEffects::UpdateEffects(this);
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}
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// If we have a filter, we need to invalidate ourselves because filter
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// output can change even if none of our descendants need repainting.
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if (StyleSVGReset()->HasFilters()) {
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InvalidateFrame();
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}
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// TODO: once we support |overflow:visible| on foreignObject, then we will
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// need to take account of our descendants here.
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nsRect overflow = nsRect(nsPoint(0,0), mRect.Size());
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nsOverflowAreas overflowAreas(overflow, overflow);
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FinishAndStoreOverflow(overflowAreas, mRect.Size());
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// Now unset the various reflow bits:
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mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
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NS_FRAME_HAS_DIRTY_CHILDREN);
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}
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void
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nsSVGForeignObjectFrame::NotifySVGChanged(uint32_t aFlags)
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{
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MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
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"Invalidation logic may need adjusting");
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bool needNewBounds = false; // i.e. mRect or visual overflow rect
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bool needReflow = false;
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bool needNewCanvasTM = false;
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if (aFlags & COORD_CONTEXT_CHANGED) {
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SVGForeignObjectElement *fO =
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static_cast<SVGForeignObjectElement*>(mContent);
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// Coordinate context changes affect mCanvasTM if we have a
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// percentage 'x' or 'y'
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if (fO->mLengthAttributes[SVGForeignObjectElement::ATTR_X].IsPercentage() ||
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fO->mLengthAttributes[SVGForeignObjectElement::ATTR_Y].IsPercentage()) {
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needNewBounds = true;
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needNewCanvasTM = true;
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}
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// Our coordinate context's width/height has changed. If we have a
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// percentage width/height our dimensions will change so we must reflow.
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if (fO->mLengthAttributes[SVGForeignObjectElement::ATTR_WIDTH].IsPercentage() ||
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fO->mLengthAttributes[SVGForeignObjectElement::ATTR_HEIGHT].IsPercentage()) {
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needNewBounds = true;
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needReflow = true;
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}
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}
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if (aFlags & TRANSFORM_CHANGED) {
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if (mCanvasTM && mCanvasTM->IsSingular()) {
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needNewBounds = true; // old bounds are bogus
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}
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needNewCanvasTM = true;
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// In an ideal world we would reflow when our CTM changes. This is because
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// glyph metrics do not necessarily scale uniformly with change in scale
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// and, as a result, CTM changes may require text to break at different
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// points. The problem would be how to keep performance acceptable when
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// e.g. the transform of an ancestor is animated.
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// We also seem to get some sort of infinite loop post bug 421584 if we
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// reflow.
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}
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if (needNewBounds) {
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// Ancestor changes can't affect how we render from the perspective of
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// any rendering observers that we may have, so we don't need to
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// invalidate them. We also don't need to invalidate ourself, since our
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// changed ancestor will have invalidated its entire area, which includes
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// our area.
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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// If we're called while the PresShell is handling reflow events then we
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// must have been called as a result of the NotifyViewportChange() call in
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// our nsSVGOuterSVGFrame's Reflow() method. We must not call RequestReflow
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// at this point (i.e. during reflow) because it could confuse the
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// PresShell and prevent it from reflowing us properly in future. Besides
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// that, nsSVGOuterSVGFrame::DidReflow will take care of reflowing us
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// synchronously, so there's no need.
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if (needReflow && !PresContext()->PresShell()->IsReflowLocked()) {
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RequestReflow(nsIPresShell::eResize);
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}
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if (needNewCanvasTM) {
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// Do this after calling InvalidateAndScheduleBoundsUpdate in case we
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// change the code and it needs to use it.
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mCanvasTM = nullptr;
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}
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}
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SVGBBox
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nsSVGForeignObjectFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
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uint32_t aFlags)
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{
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SVGForeignObjectElement *content =
|
|
static_cast<SVGForeignObjectElement*>(mContent);
|
|
|
|
float x, y, w, h;
|
|
content->GetAnimatedLengthValues(&x, &y, &w, &h, nullptr);
|
|
|
|
if (w < 0.0f) w = 0.0f;
|
|
if (h < 0.0f) h = 0.0f;
|
|
|
|
if (aToBBoxUserspace.IsSingular()) {
|
|
// XXX ReportToConsole
|
|
return SVGBBox();
|
|
}
|
|
return aToBBoxUserspace.TransformBounds(gfx::Rect(0.0, 0.0, w, h));
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
gfxMatrix
|
|
nsSVGForeignObjectFrame::GetCanvasTM()
|
|
{
|
|
if (!mCanvasTM) {
|
|
NS_ASSERTION(GetParent(), "null parent");
|
|
|
|
nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
|
|
SVGForeignObjectElement *content =
|
|
static_cast<SVGForeignObjectElement*>(mContent);
|
|
|
|
gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
|
|
|
|
mCanvasTM = new gfxMatrix(tm);
|
|
}
|
|
return *mCanvasTM;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Implementation helpers
|
|
|
|
void nsSVGForeignObjectFrame::RequestReflow(nsIPresShell::IntrinsicDirty aType)
|
|
{
|
|
if (GetStateBits() & NS_FRAME_FIRST_REFLOW)
|
|
// If we haven't had a ReflowSVG() yet, nothing to do.
|
|
return;
|
|
|
|
nsIFrame* kid = GetFirstPrincipalChild();
|
|
if (!kid)
|
|
return;
|
|
|
|
PresContext()->PresShell()->FrameNeedsReflow(kid, aType, NS_FRAME_IS_DIRTY);
|
|
}
|
|
|
|
void
|
|
nsSVGForeignObjectFrame::DoReflow()
|
|
{
|
|
MarkInReflow();
|
|
// Skip reflow if we're zero-sized, unless this is our first reflow.
|
|
if (IsDisabled() &&
|
|
!(GetStateBits() & NS_FRAME_FIRST_REFLOW))
|
|
return;
|
|
|
|
nsPresContext *presContext = PresContext();
|
|
nsIFrame* kid = GetFirstPrincipalChild();
|
|
if (!kid)
|
|
return;
|
|
|
|
// initiate a synchronous reflow here and now:
|
|
nsRenderingContext renderingContext(
|
|
presContext->PresShell()->CreateReferenceRenderingContext());
|
|
|
|
mInReflow = true;
|
|
|
|
WritingMode wm = kid->GetWritingMode();
|
|
nsHTMLReflowState reflowState(presContext, kid,
|
|
&renderingContext,
|
|
LogicalSize(wm, ISize(wm),
|
|
NS_UNCONSTRAINEDSIZE));
|
|
nsHTMLReflowMetrics desiredSize(reflowState);
|
|
nsReflowStatus status;
|
|
|
|
// We don't use mRect.height above because that tells the child to do
|
|
// page/column breaking at that height.
|
|
NS_ASSERTION(reflowState.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) &&
|
|
reflowState.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0),
|
|
"style system should ensure that :-moz-svg-foreign-content "
|
|
"does not get styled");
|
|
NS_ASSERTION(reflowState.ComputedISize() == ISize(wm),
|
|
"reflow state made child wrong size");
|
|
reflowState.SetComputedBSize(BSize(wm));
|
|
|
|
ReflowChild(kid, presContext, desiredSize, reflowState, 0, 0,
|
|
NS_FRAME_NO_MOVE_FRAME, status);
|
|
NS_ASSERTION(mRect.width == desiredSize.Width() &&
|
|
mRect.height == desiredSize.Height(), "unexpected size");
|
|
FinishReflowChild(kid, presContext, desiredSize, &reflowState, 0, 0,
|
|
NS_FRAME_NO_MOVE_FRAME);
|
|
|
|
mInReflow = false;
|
|
}
|
|
|
|
nsRect
|
|
nsSVGForeignObjectFrame::GetInvalidRegion()
|
|
{
|
|
MOZ_ASSERT(!NS_SVGDisplayListPaintingEnabled(),
|
|
"Only called by nsDisplayOuterSVG code");
|
|
|
|
nsIFrame* kid = GetFirstPrincipalChild();
|
|
if (kid->HasInvalidFrameInSubtree()) {
|
|
gfxRect r(mRect.x, mRect.y, mRect.width, mRect.height);
|
|
r.Scale(1.0 / nsPresContext::AppUnitsPerCSSPixel());
|
|
nsRect rect = nsSVGUtils::ToCanvasBounds(r, GetCanvasTM(), PresContext());
|
|
rect = nsSVGUtils::GetPostFilterVisualOverflowRect(this, rect);
|
|
return rect;
|
|
}
|
|
return nsRect();
|
|
}
|
|
|
|
|