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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 | |
24 void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation) override; | 28 void willRemoveScrollbar(Scrollbar*, ScrollbarOrientation) override; |
25 void invalidatePaintOfScrollControlsIfNeeded(const PaintInvalidationState&, const LayoutBoxModelObject& paintInvalidationContainer); | 29 void invalidatePaintOfScrollControlsIfNeeded(const PaintInvalidationState&, const LayoutBoxModelObject& paintInvalidationContainer); |
26 | 30 |
31 // Should be called when the box is changing paint invalidation container. | |
chrishtr
2015/12/03 18:52:36
"Should be called when the previous paint invalida
Xianzhu
2015/12/03 22:13:27
Done.
| |
32 void clearPreviousPaintInvalidationRects(); | |
33 | |
27 private: | 34 private: |
28 virtual LayoutBox& boxForScrollControlPaintInvalidation() const = 0; | 35 virtual LayoutBox& boxForScrollControlPaintInvalidation() const = 0; |
29 virtual LayoutScrollbarPart* scrollCorner() const = 0; | 36 virtual LayoutScrollbarPart* scrollCorner() const = 0; |
30 virtual LayoutScrollbarPart* resizer() const = 0; | 37 virtual LayoutScrollbarPart* resizer() const = 0; |
31 | 38 |
39 bool m_horizontalScrollbarPreviouslyWasOverlay; | |
chrishtr
2015/12/03 18:52:36
Can't you just clear out m_verticalScrollbarPrevio
Xianzhu
2015/12/03 22:13:27
No. We need to support the combinations of composi
| |
40 bool m_verticalScrollbarPreviouslyWasOverlay; | |
32 LayoutRect m_horizontalScrollbarPreviousPaintInvalidationRect; | 41 LayoutRect m_horizontalScrollbarPreviousPaintInvalidationRect; |
33 LayoutRect m_verticalScrollbarPreviousPaintInvalidationRect; | 42 LayoutRect m_verticalScrollbarPreviousPaintInvalidationRect; |
34 LayoutRect m_scrollCornerPreviousPaintInvalidationRect; | 43 LayoutRect m_scrollCornerPreviousPaintInvalidationRect; |
35 }; | 44 }; |
36 | 45 |
37 } // namespace blink | 46 } // namespace blink |
38 | 47 |
39 #endif // PaintInvalidationCapableScrollableArea_h | 48 #endif // PaintInvalidationCapableScrollableArea_h |
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