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828745da04
MozReview-Commit-ID: AspYUJ7lGqD --HG-- extra : rebase_source : 1f8d368312bd8149f32efc31130f4bf6659064ed
108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef mozilla_GeckoStyleContext_h
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#define mozilla_GeckoStyleContext_h
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#include "nsStyleContext.h"
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namespace mozilla {
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class GeckoStyleContext final : public nsStyleContext {
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public:
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GeckoStyleContext(nsStyleContext* aParent,
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nsIAtom* aPseudoTag,
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CSSPseudoElementType aPseudoType,
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already_AddRefed<nsRuleNode> aRuleNode,
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bool aSkipParentDisplayBasedStyleFixup);
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void* operator new(size_t sz, nsPresContext* aPresContext);
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nsPresContext* PresContext() const {
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return RuleNode()->PresContext();
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}
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void AddChild(GeckoStyleContext* aChild);
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void RemoveChild(GeckoStyleContext* aChild);
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void* GetUniqueStyleData(const nsStyleStructID& aSID);
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void* CreateEmptyStyleData(const nsStyleStructID& aSID);
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/**
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* Sets the NS_STYLE_INELIGIBLE_FOR_SHARING bit on this style context
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* and its descendants. If it finds a descendant that has the bit
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* already set, assumes that it can skip that subtree.
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*/
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void SetIneligibleForSharing();
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/**
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* On each descendant of this style context, clears out any cached inherited
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* structs indicated in aStructs.
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*/
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void ClearCachedInheritedStyleDataOnDescendants(uint32_t aStructs);
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// Find, if it already exists *and is easily findable* (i.e., near the
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// start of the child list), a style context whose:
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// * GetPseudo() matches aPseudoTag
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// * mRuleNode matches aSource
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// * !!GetStyleIfVisited() == !!aSourceIfVisited, and, if they're
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// non-null, GetStyleIfVisited()->mRuleNode == aSourceIfVisited
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// * RelevantLinkVisited() == aRelevantLinkVisited
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already_AddRefed<GeckoStyleContext>
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FindChildWithRules(const nsIAtom* aPseudoTag,
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nsRuleNode* aSource,
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nsRuleNode* aSourceIfVisited,
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bool aRelevantLinkVisited);
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#ifdef DEBUG
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void AssertChildStructsNotUsedElsewhere(nsStyleContext* aDestroyingContext,
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int32_t aLevels) const;
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void ListDescendants(FILE* out, int32_t aIndent);
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#endif
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#ifdef RESTYLE_LOGGING
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void LogChildStyleContextTree(uint32_t aStructs) const;
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#endif
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// Only called for Gecko-backed nsStyleContexts.
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void ApplyStyleFixups(bool aSkipParentDisplayBasedStyleFixup);
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bool HasNoChildren() const;
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NonOwningStyleContextSource StyleSource() const {
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return NonOwningStyleContextSource(mRuleNode);
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}
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nsRuleNode* RuleNode() const {
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MOZ_ASSERT(mRuleNode);
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return mRuleNode;
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}
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~GeckoStyleContext() {
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Destructor();
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}
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private:
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// Helper for ClearCachedInheritedStyleDataOnDescendants.
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void DoClearCachedInheritedStyleDataOnDescendants(uint32_t aStructs);
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// Children are kept in two circularly-linked lists. The list anchor
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// is not part of the list (null for empty), and we point to the first
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// child.
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// mEmptyChild for children whose rule node is the root rule node, and
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// mChild for other children. The order of children is not
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// meaningful.
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GeckoStyleContext* mChild;
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GeckoStyleContext* mEmptyChild;
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GeckoStyleContext* mPrevSibling;
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GeckoStyleContext* mNextSibling;
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RefPtr<nsRuleNode> mRuleNode;
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};
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}
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#endif // mozilla_GeckoStyleContext_h
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