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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ | 5 #ifndef UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ |
6 #define UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ | 6 #define UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 #include "base/strings/string16.h" | 11 #include "base/strings/string16.h" |
12 #include "ui/base/ui_export.h" | 12 #include "ui/base/ui_base_export.h" |
13 | 13 |
14 namespace ui { | 14 namespace ui { |
15 | 15 |
16 // Boundaries that can be passed to FindAccessibleTextBoundary, | 16 // Boundaries that can be passed to FindAccessibleTextBoundary, |
17 // representing various visual boundaries in (potentially multi-line) | 17 // representing various visual boundaries in (potentially multi-line) |
18 // text. This is used by assistive technology in order to, for example, | 18 // text. This is used by assistive technology in order to, for example, |
19 // retrieve the nearest word to the cursor, or retrieve all of the | 19 // retrieve the nearest word to the cursor, or retrieve all of the |
20 // text from the current cursor position to the end of the line. | 20 // text from the current cursor position to the end of the line. |
21 // These should be self-explanatory; "line" here refers to the visual | 21 // These should be self-explanatory; "line" here refers to the visual |
22 // line as currently displayed (possibly affected by wrapping). | 22 // line as currently displayed (possibly affected by wrapping). |
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35 FORWARDS_DIRECTION, | 35 FORWARDS_DIRECTION, |
36 // Search backwards for the previous boundary before the starting position. | 36 // Search backwards for the previous boundary before the starting position. |
37 BACKWARDS_DIRECTION | 37 BACKWARDS_DIRECTION |
38 }; | 38 }; |
39 | 39 |
40 // Convenience method needed to implement platform-specific text | 40 // Convenience method needed to implement platform-specific text |
41 // accessibility APIs like IAccessible2. Search forwards or backwards | 41 // accessibility APIs like IAccessible2. Search forwards or backwards |
42 // (depending on |direction|) from the given |start_offset| until the | 42 // (depending on |direction|) from the given |start_offset| until the |
43 // given boundary is found, and return the offset of that boundary, | 43 // given boundary is found, and return the offset of that boundary, |
44 // using the vector of line break character offsets in |line_breaks|. | 44 // using the vector of line break character offsets in |line_breaks|. |
45 size_t UI_EXPORT FindAccessibleTextBoundary(const base::string16& text, | 45 size_t UI_BASE_EXPORT |
46 const std::vector<int>& line_breaks, | 46 FindAccessibleTextBoundary(const base::string16& text, |
47 TextBoundaryType boundary, | 47 const std::vector<int>& line_breaks, |
48 size_t start_offset, | 48 TextBoundaryType boundary, |
49 TextBoundaryDirection direction); | 49 size_t start_offset, |
| 50 TextBoundaryDirection direction); |
50 | 51 |
51 } // namespace ui | 52 } // namespace ui |
52 | 53 |
53 #endif // UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ | 54 #endif // UI_BASE_ACCESSIBILITY_ACCESSIBLE_TEXT_UTILS_H_ |
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