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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ServoRestyleManager_h
#define mozilla_ServoRestyleManager_h
#include "mozilla/EventStates.h"
#include "mozilla/RestyleManagerBase.h"
#include "mozilla/ServoElementSnapshot.h"
#include "nsChangeHint.h"
#include "nsHashKeys.h"
#include "nsINode.h"
#include "nsISupportsImpl.h"
#include "nsPresContext.h"
namespace mozilla {
namespace dom {
class Element;
} // namespace dom
} // namespace mozilla
class nsAttrValue;
class nsIAtom;
class nsIContent;
class nsIFrame;
class nsStyleChangeList;
namespace mozilla {
/**
* Restyle manager for a Servo-backed style system.
*/
class ServoRestyleManager : public RestyleManagerBase
{
friend class ServoStyleSet;
public:
typedef RestyleManagerBase base_type;
NS_INLINE_DECL_REFCOUNTING(ServoRestyleManager)
explicit ServoRestyleManager(nsPresContext* aPresContext);
void PostRestyleEvent(dom::Element* aElement,
nsRestyleHint aRestyleHint,
nsChangeHint aMinChangeHint);
void PostRestyleEventForLazyConstruction();
void RebuildAllStyleData(nsChangeHint aExtraHint,
nsRestyleHint aRestyleHint);
void PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint,
nsRestyleHint aRestyleHint);
void ProcessPendingRestyles();
void ContentInserted(nsINode* aContainer, nsIContent* aChild);
void ContentAppended(nsIContent* aContainer,
nsIContent* aFirstNewContent);
void ContentRemoved(nsINode* aContainer,
nsIContent* aOldChild,
nsIContent* aFollowingSibling);
void RestyleForInsertOrChange(nsINode* aContainer,
nsIContent* aChild);
void RestyleForAppend(nsIContent* aContainer,
nsIContent* aFirstNewContent);
void ContentStateChanged(nsIContent* aContent, EventStates aStateMask);
void AttributeWillChange(dom::Element* aElement,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType,
const nsAttrValue* aNewValue);
void AttributeChanged(dom::Element* aElement, int32_t aNameSpaceID,
nsIAtom* aAttribute, int32_t aModType,
const nsAttrValue* aOldValue);
nsresult ReparentStyleContext(nsIFrame* aFrame);
bool HasPendingRestyles()
{
return !mModifiedElements.IsEmpty() ||
PresContext()->Document()->HasDirtyDescendantsForServo();
}
/**
* Gets the appropriate frame given a content and a pseudo-element tag.
*
* Right now only supports a null tag, before or after. If the pseudo-element
* is not null, the content needs to be an element.
*/
static nsIFrame* FrameForPseudoElement(const nsIContent* aContent,
nsIAtom* aPseudoTagOrNull);
protected:
~ServoRestyleManager() {}
private:
ServoElementSnapshot* SnapshotForElement(Element* aElement);
/**
* The element-to-element snapshot table to compute restyle hints.
*/
nsClassHashtable<nsRefPtrHashKey<Element>, ServoElementSnapshot>
mModifiedElements;
/**
* Traverses a tree of content that Servo has just restyled, recreating style
* contexts for their frames with the new style data.
*/
void RecreateStyleContexts(nsIContent* aContent,
nsStyleContext* aParentContext,
ServoStyleSet* aStyleSet,
nsStyleChangeList& aChangeList);
/**
* Marks the tree with the appropriate dirty flags for the given restyle hint.
*/
static void NoteRestyleHint(Element* aElement, nsRestyleHint aRestyleHint);
inline ServoStyleSet* StyleSet() const
{
MOZ_ASSERT(PresContext()->StyleSet()->IsServo(),
"ServoRestyleManager should only be used with a Servo-flavored "
"style backend");
return PresContext()->StyleSet()->AsServo();
}
};
} // namespace mozilla
#endif // mozilla_ServoRestyleManager_h
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