mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
|
|
* (C) 1999 Antti Koivisto (koivisto@kde.org)
|
|
* Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
|
|
* Copyright (C) 2010, 2012 Google Inc. All rights reserved.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public License
|
|
* along with this library; see the file COPYING.LIB. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef RenderLayerModelObject_h
|
|
#define RenderLayerModelObject_h
|
|
|
|
#include "core/rendering/RenderObject.h"
|
|
|
|
namespace blink {
|
|
|
|
class RenderLayer;
|
|
class CompositedLayerMapping;
|
|
class ScrollableArea;
|
|
|
|
enum LayerType {
|
|
NoLayer,
|
|
NormalLayer,
|
|
// A forced or overflow clip layer is required for bookkeeping purposes,
|
|
// but does not force a layer to be self painting.
|
|
OverflowClipLayer,
|
|
ForcedLayer
|
|
};
|
|
|
|
class RenderLayerModelObject : public RenderObject {
|
|
public:
|
|
explicit RenderLayerModelObject(ContainerNode*);
|
|
virtual ~RenderLayerModelObject();
|
|
|
|
// This is the only way layers should ever be destroyed.
|
|
void destroyLayer();
|
|
|
|
bool hasSelfPaintingLayer() const;
|
|
RenderLayer* layer() const { return m_layer.get(); }
|
|
ScrollableArea* scrollableArea() const;
|
|
|
|
virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
|
|
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
|
|
virtual void updateFromStyle() { }
|
|
|
|
virtual LayerType layerTypeRequired() const = 0;
|
|
|
|
// Returns true if the background is painted opaque in the given rect.
|
|
// The query rect is given in local coordinate system.
|
|
virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const { return false; }
|
|
|
|
// This is null for anonymous renderers.
|
|
ContainerNode* node() const { return toContainerNode(RenderObject::node()); }
|
|
|
|
virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
|
|
protected:
|
|
void createLayer(LayerType);
|
|
|
|
virtual void willBeDestroyed() override;
|
|
|
|
virtual InvalidationReason invalidatePaintIfNeeded(const PaintInvalidationState&, const RenderLayerModelObject& newPaintInvalidationContainer);
|
|
private:
|
|
virtual bool isLayerModelObject() const override final { return true; }
|
|
|
|
OwnPtr<RenderLayer> m_layer;
|
|
|
|
// Used to store state between styleWillChange and styleDidChange
|
|
static bool s_wasFloating;
|
|
};
|
|
|
|
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderLayerModelObject, isLayerModelObject());
|
|
|
|
} // namespace blink
|
|
|
|
#endif // RenderLayerModelObject_h
|