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Side by Side Diff: ui/gfx/text_elider.h

Issue 1015533016: Move allow_character_break property to RenderText. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: line width for truncated words Created 5 years, 8 months ago
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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 // This file defines utility functions for eliding and formatting UI text. 5 // This file defines utility functions for eliding and formatting UI text.
6 6
7 #ifndef UI_GFX_TEXT_ELIDER_H_ 7 #ifndef UI_GFX_TEXT_ELIDER_H_
8 #define UI_GFX_TEXT_ELIDER_H_ 8 #define UI_GFX_TEXT_ELIDER_H_
9 9
10 #include <string> 10 #include <string>
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102 // spot after the fact. If the word itself is too long, we always break 102 // spot after the fact. If the word itself is too long, we always break
103 // intra-word (respecting UTF-16 surrogate pairs) as necssary. Truncation 103 // intra-word (respecting UTF-16 surrogate pairs) as necssary. Truncation
104 // (indicated by an added 3 dots) occurs if the result is still too long. 104 // (indicated by an added 3 dots) occurs if the result is still too long.
105 // Returns true if the input had to be truncated (and not just reformatted). 105 // Returns true if the input had to be truncated (and not just reformatted).
106 GFX_EXPORT bool ElideRectangleString(const base::string16& input, 106 GFX_EXPORT bool ElideRectangleString(const base::string16& input,
107 size_t max_rows, 107 size_t max_rows,
108 size_t max_cols, 108 size_t max_cols,
109 bool strict, 109 bool strict,
110 base::string16* output); 110 base::string16* output);
111 111
112 // Specifies the word wrapping behavior of |ElideRectangleText()| when a word
113 // would exceed the available width.
114 enum WordWrapBehavior {
115 // Words that are too wide will be put on a new line, but will not be
116 // truncated or elided.
117 IGNORE_LONG_WORDS,
118
119 // Words that are too wide will be put on a new line and will be truncated to
120 // the available width.
121 TRUNCATE_LONG_WORDS,
122
123 // Words that are too wide will be put on a new line and will be elided to the
124 // available width.
125 ELIDE_LONG_WORDS,
126
127 // Words that are too wide will be put on a new line and will be wrapped over
128 // multiple lines.
129 WRAP_LONG_WORDS,
130 };
131
132 // Indicates whether the |available_pixel_width| by |available_pixel_height| 112 // Indicates whether the |available_pixel_width| by |available_pixel_height|
133 // rectangle passed to |ElideRectangleText()| had insufficient space to 113 // rectangle passed to |ElideRectangleText()| had insufficient space to
134 // accommodate the given |text|, leading to elision or truncation. 114 // accommodate the given |text|, leading to elision or truncation.
135 enum ReformattingResultFlags { 115 enum ReformattingResultFlags {
136 INSUFFICIENT_SPACE_HORIZONTAL = 1 << 0, 116 INSUFFICIENT_SPACE_HORIZONTAL = 1 << 0,
137 INSUFFICIENT_SPACE_VERTICAL = 1 << 1, 117 INSUFFICIENT_SPACE_VERTICAL = 1 << 1,
138 }; 118 };
139 119
140 // Reformats |text| into output vector |lines| so that the resulting text fits 120 // Reformats |text| into output vector |lines| so that the resulting text fits
141 // into an |available_pixel_width| by |available_pixel_height| rectangle with 121 // into an |available_pixel_width| by |available_pixel_height| rectangle with
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157 // CHARACTER_BREAK, and adds the horizontal ellipsis character (unicode 137 // CHARACTER_BREAK, and adds the horizontal ellipsis character (unicode
158 // character 0x2026) to render "...". The supplied string is returned if the 138 // character 0x2026) to render "...". The supplied string is returned if the
159 // string has |length| characters or less. 139 // string has |length| characters or less.
160 GFX_EXPORT base::string16 TruncateString(const base::string16& string, 140 GFX_EXPORT base::string16 TruncateString(const base::string16& string,
161 size_t length, 141 size_t length,
162 BreakType break_type); 142 BreakType break_type);
163 143
164 } // namespace gfx 144 } // namespace gfx
165 145
166 #endif // UI_GFX_TEXT_ELIDER_H_ 146 #endif // UI_GFX_TEXT_ELIDER_H_
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