diff options
Diffstat (limited to 'chromium/chrome/browser/resources/chromeos/chromevox/common/chromevox_json.js')
-rw-r--r-- | chromium/chrome/browser/resources/chromeos/chromevox/common/chromevox_json.js | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/chromium/chrome/browser/resources/chromeos/chromevox/common/chromevox_json.js b/chromium/chrome/browser/resources/chromeos/chromevox/common/chromevox_json.js deleted file mode 100644 index 96c78ca9f31..00000000000 --- a/chromium/chrome/browser/resources/chromeos/chromevox/common/chromevox_json.js +++ /dev/null @@ -1,368 +0,0 @@ -// Copyright 2014 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -goog.provide('cvox.ChromeVoxJSON'); - - -/** - * @fileoverview A simple wrapper around the JSON APIs. - * If it is possible to use the browser's built in native JSON, then - * cvox.ChromeVoxJSON is the same as JSON. - * If the page has its own version of JSON, cvox.ChromeVoxJSON will use its - * own implementation (rather than the version of JSON on the page - * which may be outdated/broken). - */ - -if (!cvox.ChromeVoxJSON) { - /** Placeholder object. */ - cvox.ChromeVoxJSON = {}; -} - -if (window.JSON && window.JSON.toString() == '[object JSON]') { - cvox.ChromeVoxJSON = window.JSON; -} else { - /* - * JSON implementation renamed to cvox.ChromeVoxJSON. - * This only gets called if the page has its own version of JSON. - * - * Based on: - * http://www.JSON.org/json2.js - * 2010-03-20 - * - * Public Domain. - * - * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK. - * - * See http://www.JSON.org/js.html - */ - (function() { - function f(n) { - // Format integers to have at least two digits. - return n < 10 ? '0' + n : n; - } - - if (typeof Date.prototype.toJSON !== 'function') { - - Date.prototype.toJSON = function(key) { - - return isFinite(this.valueOf()) ? - this.getUTCFullYear() + '-' + - f(this.getUTCMonth() + 1) + '-' + - f(this.getUTCDate()) + 'T' + - f(this.getUTCHours()) + ':' + - f(this.getUTCMinutes()) + ':' + - f(this.getUTCSeconds()) + 'Z' : 'null'; - }; - - String.prototype.toJSON = - Number.prototype.toJSON = - Boolean.prototype.toJSON = function(key) { - return /** @type {string} */ (this.valueOf()); - }; - } - - var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, - escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, - gap, - indent, - meta = { // table of character substitutions - '\b': '\\b', - '\t': '\\t', - '\n': '\\n', - '\f': '\\f', - '\r': '\\r', - '"' : '\\"', - '\\': '\\\\' - }, - rep; - - - function quote(string) { - - // If the string contains no control characters, no quote characters, and - // no backslash characters, then we can safely slap some quotes around it. - // Otherwise we must also replace the offending characters with safe - // escape sequences. - - escapable.lastIndex = 0; - return escapable.test(string) ? - '"' + string.replace(escapable, function(a) { - var c = meta[a]; - return typeof c === 'string' ? c : - '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4); - }) + '"' : - '"' + string + '"'; - } - - - function str(key, holder) { - - // Produce a string from holder[key]. - - var i, // The loop counter. - k, // The member key. - v, // The member value. - length, - mind = gap, - partial, - value = holder[key]; - - // If the value has a toJSON method, call it to obtain a replacement - // value. - - if (value && typeof value === 'object' && - typeof value.toJSON === 'function') { - value = value.toJSON(key); - } - - // If we were called with a replacer function, then call the replacer to - // obtain a replacement value. - - if (typeof rep === 'function') { - value = rep.call(holder, key, value); - } - - // What happens next depends on the value's type. - - switch (typeof value) { - case 'string': - return quote(value); - - case 'number': - // JSON numbers must be finite. Encode non-finite numbers as null. - return isFinite(value) ? String(value) : 'null'; - - case 'boolean': - case 'null': - // If the value is a boolean or null, convert it to a string. Note: - // typeof null does not produce 'null'. The case is included here in - // the remote chance that this gets fixed someday. - return String(value); - - // If the type is 'object', we might be dealing with an object or an - // array or null. - - case 'object': - - // Due to a specification blunder in ECMAScript, typeof null is - // 'object', so watch out for that case. - - if (!value) { - return 'null'; - } - - // Make an array to hold the partial results of stringifying this - // object value. - - gap += indent; - partial = []; - - // Is the value an array? - - if (Object.prototype.toString.apply(value) === '[object Array]') { - - // The value is an array. Stringify every element. Use null as a - // placeholder for non-JSON values. - - length = value.length; - for (i = 0; i < length; i += 1) { - partial[i] = str(i, value) || 'null'; - } - - // Join all of the elements together, separated with commas, and - // wrap them in brackets. - - v = partial.length === 0 ? '[]' : - gap ? '[\n' + gap + - partial.join(',\n' + gap) + '\n' + - mind + ']' : - '[' + partial.join(',') + ']'; - gap = mind; - return v; - } - - // If the replacer is an array, use it to select the members to be - // stringified. - - if (rep && typeof rep === 'object') { - length = rep.length; - for (i = 0; i < length; i += 1) { - k = rep[i]; - if (typeof k === 'string') { - v = str(k, value); - if (v) { - partial.push(quote(k) + (gap ? ': ' : ':') + v); - } - } - } - } else { - - // Otherwise, iterate through all of the keys in the object. - for (k in value) { - if (Object.hasOwnProperty.call(value, k)) { - v = str(k, value); - if (v) { - partial.push(quote(k) + (gap ? ': ' : ':') + v); - } - } - } - } - - // Join all of the member texts together, separated with commas, - // and wrap them in braces. - - v = partial.length === 0 ? '{}' : - gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + - mind + '}' : '{' + partial.join(',') + '}'; - gap = mind; - return v; - } - } - - // If the JSON object does not yet have a stringify method, give it one. - - if (typeof cvox.ChromeVoxJSON.stringify !== 'function') { - /** - * @param {*} value Input object. - * @param {(Array<string>|(function(string, *) : *)|null)=} replacer - * Replacer array or function. - * @param {(number|string|null)=} space Whitespace character. - * @return {string} json string which represents jsonObj. - */ - cvox.ChromeVoxJSON.stringify = function(value, replacer, space) { - - // The stringify method takes a value and an optional replacer, and an - // optional space parameter, and returns a JSON text. The replacer can - // be a function that can replace values, or an array of strings that - // will select the keys. A default replacer method can be provided. Use - // of the space parameter can produce text that is more easily readable. - - var i; - gap = ''; - indent = ''; - - // If the space parameter is a number, make an indent string containing - // that many spaces. - - if (typeof space === 'number') { - for (i = 0; i < space; i += 1) { - indent += ' '; - } - - // If the space parameter is a string, it will be used as the indent - // string. - - } else if (typeof space === 'string') { - indent = space; - } - - // If there is a replacer, it must be a function or an array. - // Otherwise, throw an error. - - rep = replacer; - if (replacer && typeof replacer !== 'function' && - (typeof replacer !== 'object' || - typeof replacer.length !== 'number')) { - throw new Error('JSON.stringify'); - } - - // Make a fake root object containing our value under the key of ''. - // Return the result of stringifying the value. - - return str('', {'': value}); - }; - } - - - // If the JSON object does not yet have a parse method, give it one. - - if (typeof cvox.ChromeVoxJSON.parse !== 'function') { - /** - * @param {string} text The string to parse. - * @param {(function(string, *) : *|null)=} reviver Reviver function. - * @return {*} The JSON object. - */ - cvox.ChromeVoxJSON.parse = function(text, reviver) { - - // The parse method takes a text and an optional reviver function, and - // returns a JavaScript value if the text is a valid JSON text. - - var j; - - function walk(holder, key) { - - // The walk method is used to recursively walk the resulting structure - // so that modifications can be made. - - var k, v, value = holder[key]; - if (value && typeof value === 'object') { - for (k in value) { - if (Object.hasOwnProperty.call(value, k)) { - v = walk(value, k); - if (v !== undefined) { - value[k] = v; - } else { - delete value[k]; - } - } - } - } - return reviver.call(holder, key, value); - } - - - // Parsing happens in four stages. In the first stage, we replace - // certain Unicode characters with escape sequences. JavaScript handles - // many characters incorrectly, either silently deleting them, or - // treating them as line endings. - - text = String(text); - cx.lastIndex = 0; - if (cx.test(text)) { - text = text.replace(cx, function(a) { - return '\\u' + - ('0000' + a.charCodeAt(0).toString(16)).slice(-4); - }); - } - - // In the second stage, we run the text against regular expressions that - // look for non-JSON patterns. We are especially concerned with '()' and - // 'new' because they can cause invocation, and '=' because it can cause - // mutation. But just to be safe, we want to reject all unexpected - // forms. - // We split the second stage into 4 regexp operations in order to work - // around crippling inefficiencies in IE's and Safari's regexp engines. - // First we replace the JSON backslash pairs with '@' (a non-JSON - // character). Second, we replace all simple value tokens with ']' - // characters. Third, we delete all open brackets that follow a colon or - // comma or that begin the text. Finally, we look to see that the - // remaining characters are only whitespace or ']' or ',' or ':' or '{' - // or '}'. If that is so, then the text is safe for eval. - - if (/^[\],:{}\s]*$/. - test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@'). - replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'). - replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { - - // In the third stage we use the eval function to compile the text - // into a JavaScript structure. The '{' operator is subject to a - // syntactic ambiguity in JavaScript: it can begin a block or an - // object literal. We wrap the text in parens to eliminate the - // ambiguity. - - j = eval('(' + text + ')'); - - // In the optional fourth stage, we recursively walk the new - // structure, passing each name/value pair to a reviver function for - // possible transformation. - return typeof reviver === 'function' ? walk({'': j}, '') : j; - } - - // If the text is not JSON parseable, then a SyntaxError is thrown. - - throw new SyntaxError('JSON.parse'); - }; - } - }()); -} |