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Side by Side Diff: pkg/intl/lib/bidi_formatter.dart

Issue 143453011: pkg/intl: dartfmt (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 10 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 part of intl; 5 part of intl;
6 6
7 /** 7 /**
8 * Bidi stands for Bi-directional text. 8 * Bidi stands for Bi-directional text.
9 * According to [Wikipedia](http://en.wikipedia.org/wiki/Bi-directional_text): 9 * According to [Wikipedia](http://en.wikipedia.org/wiki/Bi-directional_text):
10 * Bi-directional text is text containing text in both text directionalities, 10 * Bi-directional text is text containing text in both text directionalities,
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101 TextDirection direction}) { 101 TextDirection direction}) {
102 if (direction == null) direction = estimateDirection(text, isHtml: isHtml); 102 if (direction == null) direction = estimateDirection(text, isHtml: isHtml);
103 var result; 103 var result;
104 if (!isHtml) text = HTML_ESCAPE.convert(text); 104 if (!isHtml) text = HTML_ESCAPE.convert(text);
105 var directionChange = contextDirection.isDirectionChange(direction); 105 var directionChange = contextDirection.isDirectionChange(direction);
106 if (_alwaysSpan || directionChange) { 106 if (_alwaysSpan || directionChange) {
107 var spanDirection = ''; 107 var spanDirection = '';
108 if (directionChange) { 108 if (directionChange) {
109 spanDirection = ' dir=${direction.spanText}'; 109 spanDirection = ' dir=${direction.spanText}';
110 } 110 }
111 result= '<span$spanDirection>$text</span>'; 111 result = '<span$spanDirection>$text</span>';
112 } else { 112 } else {
113 result = text; 113 result = text;
114 } 114 }
115 return result + (resetDir? _resetDir(text, direction, isHtml) : ''); 115 return result + (resetDir ? _resetDir(text, direction, isHtml) : '');
116 } 116 }
117 117
118 /** 118 /**
119 * Format [text] of a known (if specified) or estimated [direction] for use 119 * Format [text] of a known (if specified) or estimated [direction] for use
120 * in *plain-text* output of the context directionality, so an 120 * in *plain-text* output of the context directionality, so an
121 * opposite-directionality text is neither garbled nor garbles what follows 121 * opposite-directionality text is neither garbled nor garbles what follows
122 * it. Unlike wrapWithSpan, this makes use of unicode BiDi formatting 122 * it. Unlike wrapWithSpan, this makes use of unicode BiDi formatting
123 * characters instead of spans for wrapping. The returned string would be 123 * characters instead of spans for wrapping. The returned string would be
124 * RLE+text+PDF for RTL text, or LRE+text+PDF for LTR text. 124 * RLE+text+PDF for RTL text, or LRE+text+PDF for LTR text.
125 * 125 *
(...skipping 10 matching lines...) Expand all
136 */ 136 */
137 String wrapWithUnicode(String text, {bool isHtml: false, bool resetDir: true, 137 String wrapWithUnicode(String text, {bool isHtml: false, bool resetDir: true,
138 TextDirection direction}) { 138 TextDirection direction}) {
139 if (direction == null) direction = estimateDirection(text, isHtml: isHtml); 139 if (direction == null) direction = estimateDirection(text, isHtml: isHtml);
140 var result = text; 140 var result = text;
141 if (contextDirection.isDirectionChange(direction)) { 141 if (contextDirection.isDirectionChange(direction)) {
142 var marker = direction == TextDirection.RTL ? Bidi.RLE : Bidi.LRE; 142 var marker = direction == TextDirection.RTL ? Bidi.RLE : Bidi.LRE;
143 result = "${marker}$text${Bidi.PDF}"; 143 result = "${marker}$text${Bidi.PDF}";
144 144
145 } 145 }
146 return result + (resetDir? _resetDir(text, direction, isHtml) : ''); 146 return result + (resetDir ? _resetDir(text, direction, isHtml) : '');
147 } 147 }
148 148
149 /** 149 /**
150 * Estimates the directionality of [text] using the best known 150 * Estimates the directionality of [text] using the best known
151 * general-purpose method (using relative word counts). A 151 * general-purpose method (using relative word counts). A
152 * TextDirection.UNKNOWN return value indicates completely neutral input. 152 * TextDirection.UNKNOWN return value indicates completely neutral input.
153 * [isHtml] is true if [text] HTML or HTML-escaped. 153 * [isHtml] is true if [text] HTML or HTML-escaped.
154 */ 154 */
155 TextDirection estimateDirection(String text, {bool isHtml: false}) { 155 TextDirection estimateDirection(String text, {bool isHtml: false}) {
156 return Bidi.estimateDirectionOfText(text, isHtml: isHtml); //TODO~!!! 156 return Bidi.estimateDirectionOfText(text, isHtml: isHtml); //TODO~!!!
(...skipping 14 matching lines...) Expand all
171 Bidi.endsWithRtl(text, isHtml))) || 171 Bidi.endsWithRtl(text, isHtml))) ||
172 (contextDirection == TextDirection.RTL && 172 (contextDirection == TextDirection.RTL &&
173 (direction == TextDirection.LTR || 173 (direction == TextDirection.LTR ||
174 Bidi.endsWithLtr(text, isHtml)))) { 174 Bidi.endsWithLtr(text, isHtml)))) {
175 return contextDirection == TextDirection.LTR ? Bidi.LRM : Bidi.RLM; 175 return contextDirection == TextDirection.LTR ? Bidi.LRM : Bidi.RLM;
176 } else { 176 } else {
177 return ''; 177 return '';
178 } 178 }
179 } 179 }
180 } 180 }
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