1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 // limitations under the License. 28 29 // ECMAScript 402 API implementation is broken into separate files for 30 // each service. The build system combines them together into one 31 // Intl namespace. 32 33 /** 34 * Initializes the given object so it's a valid Collator instance. 35 * Useful for subclassing. 36 */ 37 function initializeCollator(collator, locales, options) { 38 if (collator.hasOwnProperty('__initializedIntlObject')) { 39 throw new TypeError('Trying to re-initialize Collator object.'); 40 } 41 42 if (options === undefined) { 43 options = {}; 44 } 45 46 var getOption = getGetOption(options, 'collator'); 47 48 var internalOptions = {}; 49 50 defineWEProperty(internalOptions, 'usage', getOption( 51 'usage', 'string', ['sort', 'search'], 'sort')); 52 53 var sensitivity = getOption('sensitivity', 'string', 54 ['base', 'accent', 'case', 'variant']); 55 if (sensitivity === undefined && internalOptions.usage === 'sort') { 56 sensitivity = 'variant'; 57 } 58 defineWEProperty(internalOptions, 'sensitivity', sensitivity); 59 60 defineWEProperty(internalOptions, 'ignorePunctuation', getOption( 61 'ignorePunctuation', 'boolean', undefined, false)); 62 63 var locale = resolveLocale('collator', locales, options); 64 65 // ICU can't take kb, kc... parameters through localeID, so we need to pass 66 // them as options. 67 // One exception is -co- which has to be part of the extension, but only for 68 // usage: sort, and its value can't be 'standard' or 'search'. 69 var extensionMap = parseExtension(locale.extension); 70 setOptions( 71 options, extensionMap, COLLATOR_KEY_MAP, getOption, internalOptions); 72 73 var collation = 'default'; 74 var extension = ''; 75 if (extensionMap.hasOwnProperty('co') && internalOptions.usage === 'sort') { 76 if (ALLOWED_CO_VALUES.indexOf(extensionMap.co) !== -1) { 77 extension = '-u-co-' + extensionMap.co; 78 // ICU can't tell us what the collation is, so save user's input. 79 collation = extensionMap.co; 80 } 81 } else if (internalOptions.usage === 'search') { 82 extension = '-u-co-search'; 83 } 84 defineWEProperty(internalOptions, 'collation', collation); 85 86 var requestedLocale = locale.locale + extension; 87 88 // We define all properties C++ code may produce, to prevent security 89 // problems. If malicious user decides to redefine Object.prototype.locale 90 // we can't just use plain x.locale = 'us' or in C++ Set("locale", "us"). 91 // Object.defineProperties will either succeed defining or throw an error. 92 var resolved = Object.defineProperties({}, { 93 caseFirst: {writable: true}, 94 collation: {value: internalOptions.collation, writable: true}, 95 ignorePunctuation: {writable: true}, 96 locale: {writable: true}, 97 numeric: {writable: true}, 98 requestedLocale: {value: requestedLocale, writable: true}, 99 sensitivity: {writable: true}, 100 strength: {writable: true}, 101 usage: {value: internalOptions.usage, writable: true} 102 }); 103 104 var internalCollator = %CreateCollator(requestedLocale, 105 internalOptions, 106 resolved); 107 108 // Writable, configurable and enumerable are set to false by default. 109 Object.defineProperty(collator, 'collator', {value: internalCollator}); 110 Object.defineProperty(collator, '__initializedIntlObject', 111 {value: 'collator'}); 112 Object.defineProperty(collator, 'resolved', {value: resolved}); 113 114 return collator; 115 } 116 117 118 /** 119 * Constructs Intl.Collator object given optional locales and options 120 * parameters. 121 * 122 * @constructor 123 */ 124 %SetProperty(Intl, 'Collator', function() { 125 var locales = arguments[0]; 126 var options = arguments[1]; 127 128 if (!this || this === Intl) { 129 // Constructor is called as a function. 130 return new Intl.Collator(locales, options); 131 } 132 133 return initializeCollator(toObject(this), locales, options); 134 }, 135 ATTRIBUTES.DONT_ENUM 136 ); 137 138 139 /** 140 * Collator resolvedOptions method. 141 */ 142 %SetProperty(Intl.Collator.prototype, 'resolvedOptions', function() { 143 if (%_IsConstructCall()) { 144 throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR); 145 } 146 147 if (!this || typeof this !== 'object' || 148 this.__initializedIntlObject !== 'collator') { 149 throw new TypeError('resolvedOptions method called on a non-object ' + 150 'or on a object that is not Intl.Collator.'); 151 } 152 153 var coll = this; 154 var locale = getOptimalLanguageTag(coll.resolved.requestedLocale, 155 coll.resolved.locale); 156 157 return { 158 locale: locale, 159 usage: coll.resolved.usage, 160 sensitivity: coll.resolved.sensitivity, 161 ignorePunctuation: coll.resolved.ignorePunctuation, 162 numeric: coll.resolved.numeric, 163 caseFirst: coll.resolved.caseFirst, 164 collation: coll.resolved.collation 165 }; 166 }, 167 ATTRIBUTES.DONT_ENUM 168 ); 169 %FunctionSetName(Intl.Collator.prototype.resolvedOptions, 'resolvedOptions'); 170 %FunctionRemovePrototype(Intl.Collator.prototype.resolvedOptions); 171 %SetNativeFlag(Intl.Collator.prototype.resolvedOptions); 172 173 174 /** 175 * Returns the subset of the given locale list for which this locale list 176 * has a matching (possibly fallback) locale. Locales appear in the same 177 * order in the returned list as in the input list. 178 * Options are optional parameter. 179 */ 180 %SetProperty(Intl.Collator, 'supportedLocalesOf', function(locales) { 181 if (%_IsConstructCall()) { 182 throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR); 183 } 184 185 return supportedLocalesOf('collator', locales, arguments[1]); 186 }, 187 ATTRIBUTES.DONT_ENUM 188 ); 189 %FunctionSetName(Intl.Collator.supportedLocalesOf, 'supportedLocalesOf'); 190 %FunctionRemovePrototype(Intl.Collator.supportedLocalesOf); 191 %SetNativeFlag(Intl.Collator.supportedLocalesOf); 192 193 194 /** 195 * When the compare method is called with two arguments x and y, it returns a 196 * Number other than NaN that represents the result of a locale-sensitive 197 * String comparison of x with y. 198 * The result is intended to order String values in the sort order specified 199 * by the effective locale and collation options computed during construction 200 * of this Collator object, and will be negative, zero, or positive, depending 201 * on whether x comes before y in the sort order, the Strings are equal under 202 * the sort order, or x comes after y in the sort order, respectively. 203 */ 204 function compare(collator, x, y) { 205 return %InternalCompare(collator.collator, String(x), String(y)); 206 }; 207 208 209 addBoundMethod(Intl.Collator, 'compare', compare, 2); 210
