132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; 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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#ifndef mozilla_ServoRestyleManager_h
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#define mozilla_ServoRestyleManager_h
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#include "mozilla/EventStates.h"
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#include "mozilla/RestyleManagerBase.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 RestyleManagerBase
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{
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friend class ServoStyleSet;
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public:
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typedef RestyleManagerBase base_type;
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NS_INLINE_DECL_REFCOUNTING(ServoRestyleManager)
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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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void ContentStateChanged(nsIContent* aContent, 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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bool HasPendingRestyles()
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{
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return !mModifiedElements.IsEmpty() ||
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PresContext()->Document()->HasDirtyDescendantsForServo();
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}
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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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protected:
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~ServoRestyleManager() {}
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private:
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ServoElementSnapshot* SnapshotForElement(Element* aElement);
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/**
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* The element-to-element snapshot table to compute restyle hints.
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*/
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nsClassHashtable<nsRefPtrHashKey<Element>, ServoElementSnapshot>
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mModifiedElements;
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/**
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* Traverses a tree of content that Servo has just restyled, recreating style
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* contexts for their frames with the new style data.
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*/
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void RecreateStyleContexts(nsIContent* aContent,
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nsStyleContext* aParentContext,
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ServoStyleSet* aStyleSet,
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nsStyleChangeList& aChangeList);
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/**
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* Marks the tree with the appropriate dirty flags for the given restyle hint.
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*/
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static void NoteRestyleHint(Element* aElement, nsRestyleHint aRestyleHint);
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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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};
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} // namespace mozilla
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#endif // mozilla_ServoRestyleManager_h
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