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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PrePaintTreeWalk_h
#define PrePaintTreeWalk_h
#include "core/paint/ClipRect.h"
#include "core/paint/PaintInvalidator.h"
#include "core/paint/PaintPropertyTreeBuilder.h"
namespace blink {
class LayoutObject;
class LocalFrameView;
struct PrePaintTreeWalkContext;
// This class walks the whole layout tree, beginning from the root
// LocalFrameView, across frame boundaries. Helper classes are called for each
// tree node to perform actual actions. It expects to be invoked in InPrePaint
// phase.
class CORE_EXPORT PrePaintTreeWalk {
public:
PrePaintTreeWalk() {}
void Walk(LocalFrameView& root_frame);
private:
void Walk(LocalFrameView&, const PrePaintTreeWalkContext&);
void Walk(const LayoutObject&, const PrePaintTreeWalkContext&);
// Invalidates paint-layer painting optimizations, such as subsequence caching
// and empty paint phase optimizations if clips from the context have changed.
ALWAYS_INLINE void InvalidatePaintLayerOptimizationsIfNeeded(
const LayoutObject&,
PrePaintTreeWalkContext&);
bool ALWAYS_INLINE
NeedsTreeBuilderContextUpdate(const LocalFrameView&,
const PrePaintTreeWalkContext&);
bool ALWAYS_INLINE
NeedsTreeBuilderContextUpdate(const LayoutObject&,
const PrePaintTreeWalkContext&);
PaintPropertyTreeBuilder property_tree_builder_;
PaintInvalidator paint_invalidator_;
FRIEND_TEST_ALL_PREFIXES(PrePaintTreeWalkTest, ClipRects);
};
} // namespace blink
#endif // PrePaintTreeWalk_h
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