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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef PaintInvalidationCapableScrollableArea_h | 5 #ifndef PaintInvalidationCapableScrollableArea_h |
6 #define PaintInvalidationCapableScrollableArea_h | 6 #define PaintInvalidationCapableScrollableArea_h |
7 | 7 |
8 #include "core/CoreExport.h" | 8 #include "core/CoreExport.h" |
9 #include "platform/geometry/LayoutRect.h" | 9 #include "platform/geometry/LayoutRect.h" |
10 #include "platform/scroll/ScrollableArea.h" | 10 #include "platform/scroll/ScrollableArea.h" |
11 | 11 |
12 namespace blink { | 12 namespace blink { |
13 | 13 |
14 class LayoutBox; | 14 class LayoutBox; |
15 class LayoutBoxModelObject; | 15 class LayoutBoxModelObject; |
16 class LayoutScrollbarPart; | 16 class LayoutScrollbarPart; |
17 class PaintInvalidationContainer; | 17 class PaintInvalidationContainer; |
18 class PaintInvalidationState; | 18 class PaintInvalidationState; |
19 | 19 |
20 // Base class of FrameView and PaintLayerScrollableArea to share paint invalidat
ion code. | 20 // Base class of FrameView and PaintLayerScrollableArea to share paint invalidat
ion code. |
21 // TODO(wangxianzhu): Combine this into PaintLayerScrollableArea when root-layer
-scrolls launches. | 21 // TODO(wangxianzhu): Combine this into PaintLayerScrollableArea when root-layer
-scrolls launches. |
22 class CORE_EXPORT PaintInvalidationCapableScrollableArea : public ScrollableArea
{ | 22 class CORE_EXPORT PaintInvalidationCapableScrollableArea : public ScrollableArea
{ |
23 public: | 23 public: |
24 PaintInvalidationCapableScrollableArea() | |
25 : m_horizontalScrollbarPreviouslyWasOverlay(false) | |
26 , m_verticalScrollbarPreviouslyWasOverlay(false) { } | |
27 | |
28 void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation) override; | 24 void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation) override; |
29 void invalidatePaintOfScrollControlsIfNeeded(const PaintInvalidationState&,
const LayoutBoxModelObject& paintInvalidationContainer); | 25 void invalidatePaintOfScrollControlsIfNeeded(const PaintInvalidationState&,
const LayoutBoxModelObject& paintInvalidationContainer); |
30 | 26 |
31 // Should be called when the previous paint invalidation rects are no longer
valid. | |
32 void clearPreviousPaintInvalidationRects(); | |
33 | |
34 private: | 27 private: |
35 virtual LayoutBox& boxForScrollControlPaintInvalidation() const = 0; | 28 virtual LayoutBox& boxForScrollControlPaintInvalidation() const = 0; |
36 virtual LayoutScrollbarPart* scrollCorner() const = 0; | 29 virtual LayoutScrollbarPart* scrollCorner() const = 0; |
37 virtual LayoutScrollbarPart* resizer() const = 0; | 30 virtual LayoutScrollbarPart* resizer() const = 0; |
38 | 31 |
39 bool m_horizontalScrollbarPreviouslyWasOverlay; | |
40 bool m_verticalScrollbarPreviouslyWasOverlay; | |
41 LayoutRect m_horizontalScrollbarPreviousPaintInvalidationRect; | 32 LayoutRect m_horizontalScrollbarPreviousPaintInvalidationRect; |
42 LayoutRect m_verticalScrollbarPreviousPaintInvalidationRect; | 33 LayoutRect m_verticalScrollbarPreviousPaintInvalidationRect; |
43 LayoutRect m_scrollCornerPreviousPaintInvalidationRect; | 34 LayoutRect m_scrollCornerPreviousPaintInvalidationRect; |
44 }; | 35 }; |
45 | 36 |
46 } // namespace blink | 37 } // namespace blink |
47 | 38 |
48 #endif // PaintInvalidationCapableScrollableArea_h | 39 #endif // PaintInvalidationCapableScrollableArea_h |
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