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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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35 #include "platform/geometry/IntPoint.h" | 35 #include "platform/geometry/IntPoint.h" |
36 #include "platform/geometry/IntRect.h" | 36 #include "platform/geometry/IntRect.h" |
37 #include "platform/geometry/LayoutRect.h" | 37 #include "platform/geometry/LayoutRect.h" |
38 #include "platform/heap/Handle.h" | 38 #include "platform/heap/Handle.h" |
39 #include "wtf/RefCounted.h" | 39 #include "wtf/RefCounted.h" |
40 | 40 |
41 namespace blink { | 41 namespace blink { |
42 | 42 |
43 class EventHandler; | 43 class EventHandler; |
44 class FrameView; | 44 class FrameView; |
45 class IntSize; | |
46 class Node; | 45 class Node; |
47 | 46 |
48 // ViewportAnchor provides a way to anchor a viewport origin to a DOM node. | 47 // ViewportAnchor provides a way to anchor a viewport origin to a DOM node. |
49 // In particular, the user supplies the current viewport (in CSS coordinates) | 48 // In particular, the user supplies the current viewport (in CSS coordinates) |
50 // and an anchor point (in view coordinates, e.g., (0, 0) == viewport origin, | 49 // and an anchor point (in view coordinates, e.g., (0, 0) == viewport origin, |
51 // (0.5, 0) == viewport top center). The anchor point tracks the underlying DOM | 50 // (0.5, 0) == viewport top center). The anchor point tracks the underlying DOM |
52 // node; as the node moves or the view is resized, the viewport anchor maintains | 51 // node; as the node moves or the view is resized, the viewport anchor maintains |
53 // its orientation relative to the node, and the viewport origin maintains its | 52 // its orientation relative to the node, and the viewport origin maintains its |
54 // orientation relative to the anchor. | 53 // orientation relative to the anchor. |
55 class ViewportAnchor { | 54 class ViewportAnchor { |
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78 RefPtrWillBeMember<Node> m_anchorNode; | 77 RefPtrWillBeMember<Node> m_anchorNode; |
79 LayoutRect m_anchorNodeBounds; | 78 LayoutRect m_anchorNodeBounds; |
80 | 79 |
81 FloatSize m_anchorInInnerViewCoords; | 80 FloatSize m_anchorInInnerViewCoords; |
82 FloatSize m_anchorInNodeCoords; | 81 FloatSize m_anchorInNodeCoords; |
83 }; | 82 }; |
84 | 83 |
85 } // namespace blink | 84 } // namespace blink |
86 | 85 |
87 #endif | 86 #endif |
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