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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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