mirror of
https://github.com/classilla/tenfourfox.git
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194 lines
6.3 KiB
C++
194 lines
6.3 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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/* DOM object for element.style */
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#include "nsDOMCSSAttrDeclaration.h"
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#include "mozilla/css/Declaration.h"
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#include "mozilla/css/StyleRule.h"
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#include "mozilla/dom/Element.h"
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#include "nsIDocument.h"
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#include "nsIDOMMutationEvent.h"
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#include "nsIURI.h"
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#include "nsNodeUtils.h"
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#include "nsWrapperCacheInlines.h"
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#include "nsIFrame.h"
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#include "ActiveLayerTracker.h"
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using namespace mozilla;
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nsDOMCSSAttributeDeclaration::nsDOMCSSAttributeDeclaration(dom::Element* aElement,
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bool aIsSMILOverride)
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: mElement(aElement)
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, mIsSMILOverride(aIsSMILOverride)
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{
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MOZ_COUNT_CTOR(nsDOMCSSAttributeDeclaration);
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NS_ASSERTION(aElement, "Inline style for a NULL element?");
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}
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nsDOMCSSAttributeDeclaration::~nsDOMCSSAttributeDeclaration()
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{
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MOZ_COUNT_DTOR(nsDOMCSSAttributeDeclaration);
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}
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsDOMCSSAttributeDeclaration, mElement)
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// mElement holds a strong ref to us, so if it's going to be
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// skipped, the attribute declaration can't be part of a garbage
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// cycle.
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDOMCSSAttributeDeclaration)
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if (tmp->mElement && Element::CanSkip(tmp->mElement, true)) {
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if (tmp->PreservingWrapper()) {
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// This marks the wrapper black.
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tmp->GetWrapper();
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}
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return true;
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}
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return tmp->IsBlack();
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDOMCSSAttributeDeclaration)
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return tmp->IsBlack() ||
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(tmp->mElement && Element::CanSkipInCC(tmp->mElement));
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDOMCSSAttributeDeclaration)
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return tmp->IsBlack() ||
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(tmp->mElement && Element::CanSkipThis(tmp->mElement));
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSAttributeDeclaration)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSAttributeDeclaration)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSAttributeDeclaration)
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nsresult
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nsDOMCSSAttributeDeclaration::SetCSSDeclaration(css::Declaration* aDecl)
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{
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NS_ASSERTION(mElement, "Must have Element to set the declaration!");
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return
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mIsSMILOverride ? mElement->SetSMILOverrideStyleDeclaration(aDecl, true) :
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mElement->SetInlineStyleDeclaration(aDecl, nullptr, true);
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}
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nsIDocument*
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nsDOMCSSAttributeDeclaration::DocToUpdate()
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{
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// We need OwnerDoc() rather than GetCurrentDoc() because it might
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// be the BeginUpdate call that inserts mElement into the document.
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return mElement->OwnerDoc();
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}
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css::Declaration*
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nsDOMCSSAttributeDeclaration::GetCSSDeclaration(Operation aOperation)
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{
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if (!mElement)
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return nullptr;
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css::Declaration* declaration;
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if (mIsSMILOverride)
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declaration = mElement->GetSMILOverrideStyleDeclaration();
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else
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declaration = mElement->GetInlineStyleDeclaration();
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// Notify observers that our style="" attribute is going to change
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// unless:
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// * this is a declaration that holds SMIL animation values (which
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// aren't reflected in the DOM style="" attribute), or
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// * we're getting the declaration for reading, or
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// * we're getting it for property removal but we don't currently have
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// a declaration.
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// XXXbz this is a bit of a hack, especially doing it before the
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// BeginUpdate(), but this is a good chokepoint where we know we
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// plan to modify the CSSDeclaration, so need to notify
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// AttributeWillChange if this is inline style.
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if (!mIsSMILOverride &&
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((aOperation == eOperation_Modify) ||
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(aOperation == eOperation_RemoveProperty && declaration))) {
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nsNodeUtils::AttributeWillChange(mElement, kNameSpaceID_None,
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nsGkAtoms::style,
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nsIDOMMutationEvent::MODIFICATION,
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nullptr);
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}
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if (declaration) {
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return declaration;
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}
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if (aOperation != eOperation_Modify) {
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return nullptr;
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}
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// cannot fail
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RefPtr<css::Declaration> decl = new css::Declaration();
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decl->InitializeEmpty();
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// this *can* fail (inside SetAttrAndNotify, at least).
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nsresult rv;
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if (mIsSMILOverride)
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rv = mElement->SetSMILOverrideStyleDeclaration(decl, false);
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else
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rv = mElement->SetInlineStyleDeclaration(decl, nullptr, false);
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if (NS_FAILED(rv)) {
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return nullptr; // the decl will be destroyed along with the style rule
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}
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return decl;
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}
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void
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nsDOMCSSAttributeDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
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{
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NS_ASSERTION(mElement, "Something is severely broken -- there should be an Element here!");
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nsIDocument* doc = mElement->OwnerDoc();
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aCSSParseEnv.mSheetURI = doc->GetDocumentURI();
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aCSSParseEnv.mBaseURI = mElement->GetBaseURI();
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aCSSParseEnv.mPrincipal = mElement->NodePrincipal();
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aCSSParseEnv.mCSSLoader = doc->CSSLoader();
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}
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NS_IMETHODIMP
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nsDOMCSSAttributeDeclaration::GetParentRule(nsIDOMCSSRule **aParent)
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{
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NS_ENSURE_ARG_POINTER(aParent);
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*aParent = nullptr;
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return NS_OK;
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}
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/* virtual */ nsINode*
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nsDOMCSSAttributeDeclaration::GetParentObject()
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{
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return mElement;
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}
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NS_IMETHODIMP
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nsDOMCSSAttributeDeclaration::SetPropertyValue(const nsCSSProperty aPropID,
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const nsAString& aValue)
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{
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// Scripted modifications to style.opacity or style.transform
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// could immediately force us into the animated state if heuristics suggest
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// this is scripted animation.
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if (aPropID == eCSSProperty_opacity || aPropID == eCSSProperty_transform ||
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aPropID == eCSSProperty_left || aPropID == eCSSProperty_top ||
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aPropID == eCSSProperty_right || aPropID == eCSSProperty_bottom ||
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aPropID == eCSSProperty_margin_left || aPropID == eCSSProperty_margin_top ||
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aPropID == eCSSProperty_margin_right || aPropID == eCSSProperty_margin_bottom ||
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aPropID == eCSSProperty_background_position) {
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nsIFrame* frame = mElement->GetPrimaryFrame();
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if (frame) {
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ActiveLayerTracker::NotifyInlineStyleRuleModified(frame, aPropID);
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}
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}
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return nsDOMCSSDeclaration::SetPropertyValue(aPropID, aValue);
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}
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