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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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47 namespace blink { | 47 namespace blink { |
48 | 48 |
49 // ViewportAnchor provides a way to anchor a viewport origin to a DOM node. | 49 // ViewportAnchor provides a way to anchor a viewport origin to a DOM node. |
50 // In particular, the user supplies the current viewport (in CSS coordinates) | 50 // In particular, the user supplies the current viewport (in CSS coordinates) |
51 // and an anchor point (in view coordinates, e.g., (0, 0) == viewport origin, | 51 // and an anchor point (in view coordinates, e.g., (0, 0) == viewport origin, |
52 // (0.5, 0) == viewport top center). The anchor point tracks the underlying DOM | 52 // (0.5, 0) == viewport top center). The anchor point tracks the underlying DOM |
53 // node; as the node moves or the view is resized, the viewport anchor maintains | 53 // node; as the node moves or the view is resized, the viewport anchor maintains |
54 // its orientation relative to the node, and the viewport origin maintains its | 54 // its orientation relative to the node, and the viewport origin maintains its |
55 // orientation relative to the anchor. | 55 // orientation relative to the anchor. |
56 class ViewportAnchor { | 56 class ViewportAnchor { |
57 WTF_MAKE_NONCOPYABLE(ViewportAnchor); | 57 STACK_ALLOCATED(); |
58 public: | 58 public: |
59 explicit ViewportAnchor(WebCore::EventHandler* eventHandler); | 59 explicit ViewportAnchor(WebCore::EventHandler* eventHandler); |
60 | 60 |
61 void setAnchor(const WebCore::IntRect& viewRect, const WebCore::FloatSize& a
nchorInViewCoords); | 61 void setAnchor(const WebCore::IntRect& viewRect, const WebCore::FloatSize& a
nchorInViewCoords); |
62 | 62 |
63 WebCore::IntPoint computeOrigin(const WebCore::IntSize& currentViewSize) con
st; | 63 WebCore::IntPoint computeOrigin(const WebCore::IntSize& currentViewSize) con
st; |
64 | 64 |
65 private: | 65 private: |
66 WebCore::EventHandler* m_eventHandler; | 66 RawPtrWillBeMember<WebCore::EventHandler> m_eventHandler; |
67 | 67 |
68 WebCore::IntRect m_viewRect; | 68 WebCore::IntRect m_viewRect; |
69 | 69 |
70 RefPtrWillBePersistent<WebCore::Node> m_anchorNode; | 70 RefPtrWillBeMember<WebCore::Node> m_anchorNode; |
71 WebCore::LayoutRect m_anchorNodeBounds; | 71 WebCore::LayoutRect m_anchorNodeBounds; |
72 | 72 |
73 WebCore::FloatSize m_anchorInViewCoords; | 73 WebCore::FloatSize m_anchorInViewCoords; |
74 WebCore::FloatSize m_anchorInNodeCoords; | 74 WebCore::FloatSize m_anchorInNodeCoords; |
75 }; | 75 }; |
76 | 76 |
77 } // namespace blink | 77 } // namespace blink |
78 | 78 |
79 #endif | 79 #endif |
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