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Diffstat (limited to 'deps/v8/src/extensions/i18n/i18n-utils.js')
| -rw-r--r-- | deps/v8/src/extensions/i18n/i18n-utils.js | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/deps/v8/src/extensions/i18n/i18n-utils.js b/deps/v8/src/extensions/i18n/i18n-utils.js deleted file mode 100644 index 545082ecbb..0000000000 --- a/deps/v8/src/extensions/i18n/i18n-utils.js +++ /dev/null @@ -1,536 +0,0 @@ -// Copyright 2013 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -// limitations under the License. - -// ECMAScript 402 API implementation is broken into separate files for -// each service. The build system combines them together into one -// Intl namespace. - -/** - * Adds bound method to the prototype of the given object. - */ -function addBoundMethod(obj, methodName, implementation, length) { - function getter() { - if (!this || typeof this !== 'object' || - this.__initializedIntlObject === undefined) { - throw new TypeError('Method ' + methodName + ' called on a ' + - 'non-object or on a wrong type of object.'); - } - var internalName = '__bound' + methodName + '__'; - if (this[internalName] === undefined) { - var that = this; - var boundMethod; - if (length === undefined || length === 2) { - boundMethod = function(x, y) { - if (%_IsConstructCall()) { - throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR); - } - return implementation(that, x, y); - } - } else if (length === 1) { - boundMethod = function(x) { - if (%_IsConstructCall()) { - throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR); - } - return implementation(that, x); - } - } else { - boundMethod = function() { - if (%_IsConstructCall()) { - throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR); - } - // DateTimeFormat.format needs to be 0 arg method, but can stil - // receive optional dateValue param. If one was provided, pass it - // along. - if (arguments.length > 0) { - return implementation(that, arguments[0]); - } else { - return implementation(that); - } - } - } - %FunctionSetName(boundMethod, internalName); - %FunctionRemovePrototype(boundMethod); - %SetNativeFlag(boundMethod); - this[internalName] = boundMethod; - } - return this[internalName]; - } - - %FunctionSetName(getter, methodName); - %FunctionRemovePrototype(getter); - %SetNativeFlag(getter); - - Object.defineProperty(obj.prototype, methodName, { - get: getter, - enumerable: false, - configurable: true - }); -} - - -/** - * Returns an intersection of locales and service supported locales. - * Parameter locales is treated as a priority list. - */ -function supportedLocalesOf(service, locales, options) { - if (service.match(SERVICE_RE) === null) { - throw new Error('Internal error, wrong service type: ' + service); - } - - // Provide defaults if matcher was not specified. - if (options === undefined) { - options = {}; - } else { - options = toObject(options); - } - - var matcher = options.localeMatcher; - if (matcher !== undefined) { - matcher = String(matcher); - if (matcher !== 'lookup' && matcher !== 'best fit') { - throw new RangeError('Illegal value for localeMatcher:' + matcher); - } - } else { - matcher = 'best fit'; - } - - var requestedLocales = initializeLocaleList(locales); - - // Cache these, they don't ever change per service. - if (AVAILABLE_LOCALES[service] === undefined) { - AVAILABLE_LOCALES[service] = getAvailableLocalesOf(service); - } - - // Use either best fit or lookup algorithm to match locales. - if (matcher === 'best fit') { - return initializeLocaleList(bestFitSupportedLocalesOf( - requestedLocales, AVAILABLE_LOCALES[service])); - } - - return initializeLocaleList(lookupSupportedLocalesOf( - requestedLocales, AVAILABLE_LOCALES[service])); -} - - -/** - * Returns the subset of the provided BCP 47 language priority list for which - * this service has a matching locale when using the BCP 47 Lookup algorithm. - * Locales appear in the same order in the returned list as in the input list. - */ -function lookupSupportedLocalesOf(requestedLocales, availableLocales) { - var matchedLocales = []; - for (var i = 0; i < requestedLocales.length; ++i) { - // Remove -u- extension. - var locale = requestedLocales[i].replace(UNICODE_EXTENSION_RE, ''); - do { - if (availableLocales[locale] !== undefined) { - // Push requested locale not the resolved one. - matchedLocales.push(requestedLocales[i]); - break; - } - // Truncate locale if possible, if not break. - var pos = locale.lastIndexOf('-'); - if (pos === -1) { - break; - } - locale = locale.substring(0, pos); - } while (true); - } - - return matchedLocales; -} - - -/** - * Returns the subset of the provided BCP 47 language priority list for which - * this service has a matching locale when using the implementation - * dependent algorithm. - * Locales appear in the same order in the returned list as in the input list. - */ -function bestFitSupportedLocalesOf(requestedLocales, availableLocales) { - // TODO(cira): implement better best fit algorithm. - return lookupSupportedLocalesOf(requestedLocales, availableLocales); -} - - -/** - * Returns a getOption function that extracts property value for given - * options object. If property is missing it returns defaultValue. If value - * is out of range for that property it throws RangeError. - */ -function getGetOption(options, caller) { - if (options === undefined) { - throw new Error('Internal ' + caller + ' error. ' + - 'Default options are missing.'); - } - - var getOption = function getOption(property, type, values, defaultValue) { - if (options[property] !== undefined) { - var value = options[property]; - switch (type) { - case 'boolean': - value = Boolean(value); - break; - case 'string': - value = String(value); - break; - case 'number': - value = Number(value); - break; - default: - throw new Error('Internal error. Wrong value type.'); - } - if (values !== undefined && values.indexOf(value) === -1) { - throw new RangeError('Value ' + value + ' out of range for ' + caller + - ' options property ' + property); - } - - return value; - } - - return defaultValue; - } - - return getOption; -} - - -/** - * Compares a BCP 47 language priority list requestedLocales against the locales - * in availableLocales and determines the best available language to meet the - * request. Two algorithms are available to match the locales: the Lookup - * algorithm described in RFC 4647 section 3.4, and an implementation dependent - * best-fit algorithm. Independent of the locale matching algorithm, options - * specified through Unicode locale extension sequences are negotiated - * separately, taking the caller's relevant extension keys and locale data as - * well as client-provided options into consideration. Returns an object with - * a locale property whose value is the language tag of the selected locale, - * and properties for each key in relevantExtensionKeys providing the selected - * value for that key. - */ -function resolveLocale(service, requestedLocales, options) { - requestedLocales = initializeLocaleList(requestedLocales); - - var getOption = getGetOption(options, service); - var matcher = getOption('localeMatcher', 'string', - ['lookup', 'best fit'], 'best fit'); - var resolved; - if (matcher === 'lookup') { - resolved = lookupMatcher(service, requestedLocales); - } else { - resolved = bestFitMatcher(service, requestedLocales); - } - - return resolved; -} - - -/** - * Returns best matched supported locale and extension info using basic - * lookup algorithm. - */ -function lookupMatcher(service, requestedLocales) { - if (service.match(SERVICE_RE) === null) { - throw new Error('Internal error, wrong service type: ' + service); - } - - // Cache these, they don't ever change per service. - if (AVAILABLE_LOCALES[service] === undefined) { - AVAILABLE_LOCALES[service] = getAvailableLocalesOf(service); - } - - for (var i = 0; i < requestedLocales.length; ++i) { - // Remove all extensions. - var locale = requestedLocales[i].replace(ANY_EXTENSION_RE, ''); - do { - if (AVAILABLE_LOCALES[service][locale] !== undefined) { - // Return the resolved locale and extension. - var extensionMatch = requestedLocales[i].match(UNICODE_EXTENSION_RE); - var extension = (extensionMatch === null) ? '' : extensionMatch[0]; - return {'locale': locale, 'extension': extension, 'position': i}; - } - // Truncate locale if possible. - var pos = locale.lastIndexOf('-'); - if (pos === -1) { - break; - } - locale = locale.substring(0, pos); - } while (true); - } - - // Didn't find a match, return default. - if (DEFAULT_ICU_LOCALE === undefined) { - DEFAULT_ICU_LOCALE = %GetDefaultICULocale(); - } - - return {'locale': DEFAULT_ICU_LOCALE, 'extension': '', 'position': -1}; -} - - -/** - * Returns best matched supported locale and extension info using - * implementation dependend algorithm. - */ -function bestFitMatcher(service, requestedLocales) { - // TODO(cira): implement better best fit algorithm. - return lookupMatcher(service, requestedLocales); -} - - -/** - * Parses Unicode extension into key - value map. - * Returns empty object if the extension string is invalid. - * We are not concerned with the validity of the values at this point. - */ -function parseExtension(extension) { - var extensionSplit = extension.split('-'); - - // Assume ['', 'u', ...] input, but don't throw. - if (extensionSplit.length <= 2 || - (extensionSplit[0] !== '' && extensionSplit[1] !== 'u')) { - return {}; - } - - // Key is {2}alphanum, value is {3,8}alphanum. - // Some keys may not have explicit values (booleans). - var extensionMap = {}; - var previousKey = undefined; - for (var i = 2; i < extensionSplit.length; ++i) { - var length = extensionSplit[i].length; - var element = extensionSplit[i]; - if (length === 2) { - extensionMap[element] = undefined; - previousKey = element; - } else if (length >= 3 && length <=8 && previousKey !== undefined) { - extensionMap[previousKey] = element; - previousKey = undefined; - } else { - // There is a value that's too long, or that doesn't have a key. - return {}; - } - } - - return extensionMap; -} - - -/** - * Converts parameter to an Object if possible. - */ -function toObject(value) { - if (value === undefined || value === null) { - throw new TypeError('Value cannot be converted to an Object.'); - } - - return Object(value); -} - - -/** - * Populates internalOptions object with boolean key-value pairs - * from extensionMap and options. - * Returns filtered extension (number and date format constructors use - * Unicode extensions for passing parameters to ICU). - * It's used for extension-option pairs only, e.g. kn-normalization, but not - * for 'sensitivity' since it doesn't have extension equivalent. - * Extensions like nu and ca don't have options equivalent, so we place - * undefined in the map.property to denote that. - */ -function setOptions(inOptions, extensionMap, keyValues, getOption, outOptions) { - var extension = ''; - - var updateExtension = function updateExtension(key, value) { - return '-' + key + '-' + String(value); - } - - var updateProperty = function updateProperty(property, type, value) { - if (type === 'boolean' && (typeof value === 'string')) { - value = (value === 'true') ? true : false; - } - - if (property !== undefined) { - defineWEProperty(outOptions, property, value); - } - } - - for (var key in keyValues) { - if (keyValues.hasOwnProperty(key)) { - var value = undefined; - var map = keyValues[key]; - if (map.property !== undefined) { - // This may return true if user specifies numeric: 'false', since - // Boolean('nonempty') === true. - value = getOption(map.property, map.type, map.values); - } - if (value !== undefined) { - updateProperty(map.property, map.type, value); - extension += updateExtension(key, value); - continue; - } - // User options didn't have it, check Unicode extension. - // Here we want to convert strings 'true', 'false' into proper Boolean - // values (not a user error). - if (extensionMap.hasOwnProperty(key)) { - value = extensionMap[key]; - if (value !== undefined) { - updateProperty(map.property, map.type, value); - extension += updateExtension(key, value); - } else if (map.type === 'boolean') { - // Boolean keys are allowed not to have values in Unicode extension. - // Those default to true. - updateProperty(map.property, map.type, true); - extension += updateExtension(key, true); - } - } - } - } - - return extension === ''? '' : '-u' + extension; -} - - -/** - * Converts all OwnProperties into - * configurable: false, writable: false, enumerable: true. - */ -function freezeArray(array) { - array.forEach(function(element, index) { - Object.defineProperty(array, index, {value: element, - configurable: false, - writable: false, - enumerable: true}); - }); - - Object.defineProperty(array, 'length', {value: array.length, - writable: false}); - - return array; -} - - -/** - * It's sometimes desireable to leave user requested locale instead of ICU - * supported one (zh-TW is equivalent to zh-Hant-TW, so we should keep shorter - * one, if that was what user requested). - * This function returns user specified tag if its maximized form matches ICU - * resolved locale. If not we return ICU result. - */ -function getOptimalLanguageTag(original, resolved) { - // Returns Array<Object>, where each object has maximized and base properties. - // Maximized: zh -> zh-Hans-CN - // Base: zh-CN-u-ca-gregory -> zh-CN - // Take care of grandfathered or simple cases. - if (original === resolved) { - return original; - } - - var locales = %GetLanguageTagVariants([original, resolved]); - if (locales[0].maximized !== locales[1].maximized) { - return resolved; - } - - // Preserve extensions of resolved locale, but swap base tags with original. - var resolvedBase = new RegExp('^' + locales[1].base); - return resolved.replace(resolvedBase, locales[0].base); -} - - -/** - * Returns an Object that contains all of supported locales for a given - * service. - * In addition to the supported locales we add xx-ZZ locale for each xx-Yyyy-ZZ - * that is supported. This is required by the spec. - */ -function getAvailableLocalesOf(service) { - var available = %AvailableLocalesOf(service); - - for (var i in available) { - if (available.hasOwnProperty(i)) { - var parts = i.match(/^([a-z]{2,3})-([A-Z][a-z]{3})-([A-Z]{2})$/); - if (parts !== null) { - // Build xx-ZZ. We don't care about the actual value, - // as long it's not undefined. - available[parts[1] + '-' + parts[3]] = null; - } - } - } - - return available; -} - - -/** - * Defines a property and sets writable and enumerable to true. - * Configurable is false by default. - */ -function defineWEProperty(object, property, value) { - Object.defineProperty(object, property, - {value: value, writable: true, enumerable: true}); -} - - -/** - * Adds property to an object if the value is not undefined. - * Sets configurable descriptor to false. - */ -function addWEPropertyIfDefined(object, property, value) { - if (value !== undefined) { - defineWEProperty(object, property, value); - } -} - - -/** - * Defines a property and sets writable, enumerable and configurable to true. - */ -function defineWECProperty(object, property, value) { - Object.defineProperty(object, property, - {value: value, - writable: true, - enumerable: true, - configurable: true}); -} - - -/** - * Adds property to an object if the value is not undefined. - * Sets all descriptors to true. - */ -function addWECPropertyIfDefined(object, property, value) { - if (value !== undefined) { - defineWECProperty(object, property, value); - } -} - - -/** - * Returns titlecased word, aMeRricA -> America. - */ -function toTitleCaseWord(word) { - return word.substr(0, 1).toUpperCase() + word.substr(1).toLowerCase(); -} |