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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 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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29 */ | 29 */ |
30 | 30 |
31 #ifndef FindInPageCoordinates_h | 31 #ifndef FindInPageCoordinates_h |
32 #define FindInPageCoordinates_h | 32 #define FindInPageCoordinates_h |
33 | 33 |
34 #include "platform/geometry/FloatRect.h" | 34 #include "platform/geometry/FloatRect.h" |
35 | 35 |
36 namespace blink { | 36 namespace blink { |
37 class Range; | 37 class Range; |
38 class RenderObject; | 38 class RenderObject; |
39 } | |
40 | |
41 namespace blink { | |
42 | 39 |
43 // Find-in-page coordinate conversion methods. | 40 // Find-in-page coordinate conversion methods. |
44 // | 41 // |
45 // This coordinate system is designed to give consistent tickmarks in cases wher
e find matches | 42 // This coordinate system is designed to give consistent tickmarks in cases wher
e find matches |
46 // are in scrollable areas but might not be visible (e.g. child frames, scroll:o
verflow). | 43 // are in scrollable areas but might not be visible (e.g. child frames, scroll:o
verflow). |
47 // In these cases, using absolute positions might lead to tickmarks pointing out
side the visible | 44 // In these cases, using absolute positions might lead to tickmarks pointing out
side the visible |
48 // area of its container, which is counter-intuitive for users. | 45 // area of its container, which is counter-intuitive for users. |
49 // | 46 // |
50 // Find-in-page coordinates are represented as normalized fractions of the main
frame document with | 47 // Find-in-page coordinates are represented as normalized fractions of the main
frame document with |
51 // the property that they are built by composing the relative position of each r
enderer to the maximum | 48 // the property that they are built by composing the relative position of each r
enderer to the maximum |
52 // effective layout size of its container all the way up the render tree. The re
sulting coordinates | 49 // effective layout size of its container all the way up the render tree. The re
sulting coordinates |
53 // are scroll-independent, representing any contents scaled to the visible area
of their container. | 50 // are scroll-independent, representing any contents scaled to the visible area
of their container. |
54 // The provided methods support scroll:overflow and are CSS position and transfo
rm-friendly. | 51 // The provided methods support scroll:overflow and are CSS position and transfo
rm-friendly. |
55 | 52 |
56 FloatRect findInPageRectFromAbsoluteRect(const FloatRect&, const RenderObject*); | 53 FloatRect findInPageRectFromAbsoluteRect(const FloatRect&, const RenderObject*); |
57 FloatRect findInPageRectFromRange(Range*); | 54 FloatRect findInPageRectFromRange(Range*); |
58 | 55 |
59 } // namespace blink | 56 } // namespace blink |
60 | 57 |
61 #endif | 58 #endif |
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