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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 BASE_I18N_RTL_H_ | 5 #ifndef BASE_I18N_RTL_H_ |
6 #define BASE_I18N_RTL_H_ | 6 #define BASE_I18N_RTL_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/compiler_specific.h" | 10 #include "base/compiler_specific.h" |
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57 // Returns whether the text direction for the default ICU locale is RTL. This | 57 // Returns whether the text direction for the default ICU locale is RTL. This |
58 // assumes that SetICUDefaultLocale has been called to set the default locale to | 58 // assumes that SetICUDefaultLocale has been called to set the default locale to |
59 // the UI locale of Chrome. | 59 // the UI locale of Chrome. |
60 // NOTE: Generally, you should call IsRTL() instead of this. | 60 // NOTE: Generally, you should call IsRTL() instead of this. |
61 BASE_I18N_EXPORT bool ICUIsRTL(); | 61 BASE_I18N_EXPORT bool ICUIsRTL(); |
62 | 62 |
63 // Returns the text direction for |locale_name|. | 63 // Returns the text direction for |locale_name|. |
64 BASE_I18N_EXPORT TextDirection GetTextDirectionForLocale( | 64 BASE_I18N_EXPORT TextDirection GetTextDirectionForLocale( |
65 const char* locale_name); | 65 const char* locale_name); |
66 | 66 |
67 // Given the string in |text|, returns the directionality of the first or last | 67 // Given the string in |text|, returns the directionality of the first |
68 // character with strong directionality in the string. If no character in the | 68 // character with strong directionality in the string. If no character in the |
69 // text has strong directionality, LEFT_TO_RIGHT is returned. The Bidi | 69 // text has strong directionality, LEFT_TO_RIGHT is returned. The Bidi |
70 // character types L, LRE, LRO, R, AL, RLE, and RLO are considered as strong | 70 // character types L, LRE, LRO, R, AL, RLE, and RLO are considered as strong |
71 // directionality characters. Please refer to http://unicode.org/reports/tr9/ | 71 // directionality characters. Please refer to http://unicode.org/reports/tr9/ |
72 // for more information. | 72 // for more information. |
73 BASE_I18N_EXPORT TextDirection GetFirstStrongCharacterDirection( | 73 BASE_I18N_EXPORT TextDirection GetFirstStrongCharacterDirection( |
74 const string16& text); | 74 const string16& text); |
75 BASE_I18N_EXPORT TextDirection GetLastStrongCharacterDirection( | |
76 const string16& text); | |
77 | 75 |
78 // Given the string in |text|, returns LEFT_TO_RIGHT or RIGHT_TO_LEFT if all the | 76 // Given the string in |text|, returns LEFT_TO_RIGHT or RIGHT_TO_LEFT if all the |
79 // strong directionality characters in the string are of the same | 77 // strong directionality characters in the string are of the same |
80 // directionality. It returns UNKNOWN_DIRECTION if the string contains a mix of | 78 // directionality. It returns UNKNOWN_DIRECTION if the string contains a mix of |
81 // LTR and RTL strong directionality characters. Defaults to LEFT_TO_RIGHT if | 79 // LTR and RTL strong directionality characters. Defaults to LEFT_TO_RIGHT if |
82 // the string does not contain directionality characters. Please refer to | 80 // the string does not contain directionality characters. Please refer to |
83 // http://unicode.org/reports/tr9/ for more information. | 81 // http://unicode.org/reports/tr9/ for more information. |
84 BASE_I18N_EXPORT TextDirection GetStringDirection(const string16& text); | 82 BASE_I18N_EXPORT TextDirection GetStringDirection(const string16& text); |
85 | 83 |
86 // Given the string in |text|, this function modifies the string in place with | 84 // Given the string in |text|, this function modifies the string in place with |
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140 // return the text itself. Explicit bidi control characters display and have | 138 // return the text itself. Explicit bidi control characters display and have |
141 // semantic effect. They can be deleted so they might not always appear in a | 139 // semantic effect. They can be deleted so they might not always appear in a |
142 // pair. | 140 // pair. |
143 BASE_I18N_EXPORT string16 StripWrappingBidiControlCharacters( | 141 BASE_I18N_EXPORT string16 StripWrappingBidiControlCharacters( |
144 const string16& text) WARN_UNUSED_RESULT; | 142 const string16& text) WARN_UNUSED_RESULT; |
145 | 143 |
146 } // namespace i18n | 144 } // namespace i18n |
147 } // namespace base | 145 } // namespace base |
148 | 146 |
149 #endif // BASE_I18N_RTL_H_ | 147 #endif // BASE_I18N_RTL_H_ |
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