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Side by Side Diff: Source/core/rendering/RenderLayerModelObject.h

Issue 898783003: Move rendering/RenderLayer* to layout/ (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 5 years, 10 months ago
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1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
5 * Copyright (C) 2010, 2012 Google Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23 #ifndef RenderLayerModelObject_h
24 #define RenderLayerModelObject_h
25
26 #include "core/rendering/RenderObject.h"
27
28 namespace blink {
29
30 class RenderLayer;
31 class RenderLayerScrollableArea;
32
33 enum LayerType {
34 NoLayer,
35 NormalLayer,
36 // A forced or overflow clip layer is required for bookkeeping purposes,
37 // but does not force a layer to be self painting.
38 OverflowClipLayer,
39 ForcedLayer
40 };
41
42 class RenderLayerModelObject : public RenderObject {
43 public:
44 explicit RenderLayerModelObject(ContainerNode*);
45 virtual ~RenderLayerModelObject();
46
47 // This is the only way layers should ever be destroyed.
48 void destroyLayer();
49
50 bool hasSelfPaintingLayer() const;
51 RenderLayer* layer() const { return m_layer.get(); }
52 RenderLayerScrollableArea* scrollableArea() const;
53
54 virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) o verride;
55 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) ov erride;
56 virtual void updateFromStyle() { }
57
58 virtual LayerType layerTypeRequired() const = 0;
59
60 // Returns true if the background is painted opaque in the given rect.
61 // The query rect is given in local coordinate system.
62 virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const { re turn false; }
63
64 // This is null for anonymous renderers.
65 ContainerNode* node() const { return toContainerNode(RenderObject::node()); }
66
67 virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
68
69 // Indicate that the contents of this renderer need to be repainted. Only ha s an effect if compositing is being used,
70 void setBackingNeedsPaintInvalidationInRect(const LayoutRect&, PaintInvalida tionReason) const; // r is in the coordinate space of this render object
71
72 protected:
73 void createLayer(LayerType);
74
75 virtual void willBeDestroyed() override;
76
77 virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer*, co nst LayoutPoint&, const LayoutRect&) const override;
78
79 void addChildFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& addition alOffset) const;
80
81 private:
82 virtual bool isLayerModelObject() const override final { return true; }
83
84 OwnPtr<RenderLayer> m_layer;
85
86 // Used to store state between styleWillChange and styleDidChange
87 static bool s_wasFloating;
88 };
89
90 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderLayerModelObject, isLayerModelObject());
91
92 } // namespace blink
93
94 #endif // RenderLayerModelObject_h
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