Mercurial > babel > old > babel-test

annotate contrib/babel.js @ 526:97e99dbc63f8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Get rid of the utility set here as well.
author jruigrok
date Sat, 05 Mar 2011 15:05:28 +0000
parents a03ce004eff1
children 85e1beadacb0
rev   line source
362
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1 /**
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2 * Babel JavaScript Support
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3 *
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4 * Copyright (C) 2008 Edgewall Software
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5 * All rights reserved.
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6 *
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7 * This software is licensed as described in the file COPYING, which
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8 * you should have received as part of this distribution. The terms
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9 * are also available at http://babel.edgewall.org/wiki/License.
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10 *
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11 * This software consists of voluntary contributions made by many
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12 * individuals. For the exact contribution history, see the revision
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13 * history and logs, available at http://babel.edgewall.org/log/.
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14 */
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15
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16 /**
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17 * A simple module that provides a gettext like translation interface.
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18 * The catalog passed to load() must be a object conforming to this
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19 * interface::
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20 *
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21 * {
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22 * messages: an object of {msgid: translations} items where
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23 * translations is an array of messages or a single
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24 * string if the message is not pluralizable.
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25 * plural_expr: the plural expression for the language.
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26 * locale: the identifier for this locale.
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27 * domain: the name of the domain.
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28 * }
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29 *
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30 * Missing elements in the object are ignored.
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31 *
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32 * Typical usage::
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33 *
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34 * var translations = babel.Translations.load(...).install();
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35 */
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36 var babel = new function() {
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37
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38 var defaultPluralExpr = function(n) { return n == 1 ? 0 : 1; };
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39 var formatRegex = /%?%(?:\(([^\)]+)\))?([disr])/g;
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40
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41 /**
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42 * A translations object implementing the gettext interface
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43 */
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44 var Translations = this.Translations = function(locale, domain) {
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45 this.messages = {};
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46 this.locale = locale || 'unknown';
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47 this.domain = domain || 'messages';
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48 this.pluralexpr = defaultPluralExpr;
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49 };
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50
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51 /**
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52 * Create a new translations object from the catalog and return it.
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53 * See the babel-module comment for more details.
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54 */
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55 Translations.load = function(catalog) {
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56 var rv = new Translations();
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57 rv.load(catalog);
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58 return rv;
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59 };
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60
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61 Translations.prototype = {
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62 /**
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63 * translate a single string.
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64 */
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65 gettext: function(string) {
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66 var translated = this.messages[string];
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67 if (typeof translated == 'undefined')
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68 return string;
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69 return (typeof translated == 'string') ? translated : translated[0];
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70 },
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71
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72 /**
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73 * translate a pluralizable string
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74 */
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75 ngettext: function(singular, plural, n) {
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76 var translated = this.messages[singular];
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77 if (typeof translated == 'undefined')
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78 return (n == 1) ? singular : plural;
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79 return translated[this.pluralexpr(n)];
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80 },
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81
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82 /**
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83 * Install this translation document wide. After this call, there are
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84 * three new methods on the window object: _, gettext and ngettext
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85 */
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86 install: function() {
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87 var self = this;
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88 window._ = window.gettext = function(string) {
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89 return self.gettext(string);
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90 };
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91 window.ngettext = function(singular, plural, n) {
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92 return self.ngettext(singular, plural, n);
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93 };
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94 return this;
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95 },
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96
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97 /**
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98 * Works like Translations.load but updates the instance rather
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99 * then creating a new one.
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100 */
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101 load: function(catalog) {
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102 if (catalog.messages)
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103 this.update(catalog.messages)
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104 if (catalog.plural_expr)
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105 this.setPluralExpr(catalog.plural_expr);
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106 if (catalog.locale)
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107 this.locale = catalog.locale;
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108 if (catalog.domain)
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109 this.domain = catalog.domain;
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110 return this;
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111 },
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112
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113 /**
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114 * Updates the translations with the object of messages.
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115 */
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116 update: function(mapping) {
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117 for (var key in mapping)
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118 if (mapping.hasOwnProperty(key))
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119 this.messages[key] = mapping[key];
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120 return this;
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121 },
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122
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123 /**
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124 * Sets the plural expression
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125 */
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126 setPluralExpr: function(expr) {
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127 this.pluralexpr = new Function('n', 'return +(' + expr + ')');
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128 return this;
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129 }
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130 };
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131
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132 /**
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133 * A python inspired string formatting function. Supports named and
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134 * positional placeholders and "s", "d" and "i" as type characters
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135 * without any formatting specifications.
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136 *
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137 * Examples::
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138 *
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139 * babel.format(_('Hello %s'), name)
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140 * babel.format(_('Progress: %(percent)s%%'), {percent: 100})
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141 */
362
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142 this.format = function() {
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143 var arg, string = arguments[0], idx = 0;
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144 if (arguments.length == 1)
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145 return string;
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146 else if (arguments.length == 2 && typeof arguments[1] == 'object')
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147 arg = arguments[1];
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148 else {
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149 arg = [];
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150 for (var i = 1, n = arguments.length; i != n; ++i)
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151 arg[i - 1] = arguments[i];
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152 }
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153 return string.replace(formatRegex, function(all, name, type) {
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154 if (all[0] == all[1]) return all.substring(1);
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155 var value = arg[name || idx++];
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156 return (type == 'i' || type == 'd') ? +value : value;
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157 });
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158 }
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159
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160 };
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