зеркало из https://github.com/mozilla/gecko-dev.git
140 строки
4.7 KiB
C++
140 строки
4.7 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_ServoRestyleManager_h
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#define mozilla_ServoRestyleManager_h
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#include "mozilla/DocumentStyleRootIterator.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/ServoElementSnapshot.h"
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#include "nsChangeHint.h"
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#include "nsHashKeys.h"
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#include "nsINode.h"
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#include "nsISupportsImpl.h"
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#include "nsPresContext.h"
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namespace mozilla {
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namespace dom {
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class Element;
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} // namespace dom
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} // namespace mozilla
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class nsAttrValue;
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class nsIAtom;
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class nsIContent;
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class nsIFrame;
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class nsStyleChangeList;
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namespace mozilla {
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/**
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* Restyle manager for a Servo-backed style system.
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*/
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class ServoRestyleManager : public RestyleManager
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{
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friend class ServoStyleSet;
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public:
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typedef RestyleManager base_type;
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explicit ServoRestyleManager(nsPresContext* aPresContext);
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void PostRestyleEvent(dom::Element* aElement,
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nsRestyleHint aRestyleHint,
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nsChangeHint aMinChangeHint);
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void PostRestyleEventForLazyConstruction();
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void RebuildAllStyleData(nsChangeHint aExtraHint,
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nsRestyleHint aRestyleHint);
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void PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint,
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nsRestyleHint aRestyleHint);
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void ProcessPendingRestyles();
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void ContentInserted(nsINode* aContainer, nsIContent* aChild);
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void ContentAppended(nsIContent* aContainer,
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nsIContent* aFirstNewContent);
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void ContentRemoved(nsINode* aContainer,
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nsIContent* aOldChild,
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nsIContent* aFollowingSibling);
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void RestyleForInsertOrChange(nsINode* aContainer,
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nsIContent* aChild);
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void RestyleForAppend(nsIContent* aContainer,
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nsIContent* aFirstNewContent);
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nsresult ContentStateChanged(nsIContent* aContent,
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EventStates aStateMask);
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void AttributeWillChange(dom::Element* aElement,
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int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType,
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const nsAttrValue* aNewValue);
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void AttributeChanged(dom::Element* aElement, int32_t aNameSpaceID,
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nsIAtom* aAttribute, int32_t aModType,
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const nsAttrValue* aOldValue);
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nsresult ReparentStyleContext(nsIFrame* aFrame);
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/**
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* Gets the appropriate frame given a content and a pseudo-element tag.
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*
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* Right now only supports a null tag, before or after. If the pseudo-element
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* is not null, the content needs to be an element.
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*/
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static nsIFrame* FrameForPseudoElement(const nsIContent* aContent,
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nsIAtom* aPseudoTagOrNull);
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/**
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* Clears the ServoElementData and HasDirtyDescendants from all elements
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* in the subtree rooted at aElement.
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*/
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static void ClearServoDataFromSubtree(Element* aElement);
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protected:
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~ServoRestyleManager() override
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{
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MOZ_ASSERT(!mReentrantChanges);
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}
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private:
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/**
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* Performs post-Servo-traversal processing on this element and its descendants.
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*/
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void ProcessPostTraversal(Element* aElement,
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nsStyleContext* aParentContext,
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ServoStyleSet* aStyleSet,
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nsStyleChangeList& aChangeList);
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void ProcessPostTraversalForText(nsIContent* aTextNode,
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nsStyleContext* aParentContext,
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ServoStyleSet* aStyleSet,
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nsStyleChangeList& aChangeList);
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inline ServoStyleSet* StyleSet() const
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{
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MOZ_ASSERT(PresContext()->StyleSet()->IsServo(),
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"ServoRestyleManager should only be used with a Servo-flavored "
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"style backend");
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return PresContext()->StyleSet()->AsServo();
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}
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// We use a separate data structure from nsStyleChangeList because we need a
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// frame to create nsStyleChangeList entries, and the primary frame may not be
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// attached yet.
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struct ReentrantChange {
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nsCOMPtr<nsIContent> mContent;
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nsChangeHint mHint;
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};
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typedef AutoTArray<ReentrantChange, 10> ReentrantChangeList;
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// Only non-null while processing change hints. See the comment in
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// ProcessPendingRestyles.
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ReentrantChangeList* mReentrantChanges;
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};
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} // namespace mozilla
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#endif // mozilla_ServoRestyleManager_h
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