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Issue #2135 - Bug 1329877: Optimize AncestorFilter usage in lazy frame construction

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FranklinDM 2023-03-04 13:59:36 +08:00 • committed by roytam1
commit 7924a2f60d
3 changed files with 112 additions and 33 deletions
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17
layout/base/nsCSSFrameConstructor.h
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@ -87,7 +87,8 @@ public:
void CreateNeededFrames();
private:
void CreateNeededFrames(nsIContent* aContent);
void CreateNeededFrames(nsIContent* aContent,
TreeMatchContext& aTreeMatchContext);
enum Operation {
CONTENTAPPEND,
@ -202,9 +203,15 @@ public:
// If aAllowLazyConstruction is true then frame construction of the new
// children can be done lazily.
//
// When constructing frames lazily, we can keep the tree match context in a
// much easier way than nsFrameConstructorState, and thus, we're allowed to
// provide a TreeMatchContext to avoid calling InitAncestors repeatedly deep
// in the DOM.
void ContentAppended(nsIContent* aContainer,
nsIContent* aFirstNewContent,
bool aAllowLazyConstruction);
bool aAllowLazyConstruction,
TreeMatchContext* aProvidedTreeMatchContext = nullptr);
// If aAllowLazyConstruction is true then frame construction of the new child
// can be done lazily.
@ -219,11 +226,15 @@ public:
// aStartChild. If aAllowLazyConstruction is true then frame construction of
// the new children can be done lazily. It is only allowed to be true when
// inserting a single node.
//
// See ContentAppended to see why we allow passing an already initialized
// TreeMatchContext.
void ContentRangeInserted(nsIContent* aContainer,
nsIContent* aStartChild,
nsIContent* aEndChild,
nsILayoutHistoryState* aFrameState,
bool aAllowLazyConstruction);
bool aAllowLazyConstruction,
TreeMatchContext* aProvidedTreeMatchContext = nullptr);
public:
// FIXME(emilio): How important is it to keep the frame tree state around for