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79 lines
2.8 KiB
79 lines
2.8 KiB
// Copyright 2012 WebDriver committers
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// Copyright 2012 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview Provides JSON utilities that uses native JSON parsing where
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* possible (a feature not currently offered by Closure).
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*/
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goog.provide('bot.json');
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goog.require('bot.userAgent');
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goog.require('goog.json');
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goog.require('goog.userAgent');
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/**
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* @define {boolean} NATIVE_JSON indicates whether the code should rely on the
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* native {@code JSON} functions, if available.
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*
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* <p>The JSON functions can be defined by external libraries like Prototype
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* and setting this flag to false forces the use of Closure's goog.json
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* implementation.
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*
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* <p>If your JavaScript can be loaded by a third_party site and you are wary
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* about relying on the native functions, specify
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* "--define bot.json.NATIVE_JSON=false" to the Closure compiler.
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*/
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bot.json.NATIVE_JSON = true;
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/**
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* Whether the current browser supports the native JSON interface.
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* @const
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* @see http://caniuse.com/#search=JSON
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* @private {boolean}
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*/
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bot.json.SUPPORTS_NATIVE_JSON_ =
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// List WebKit and Opera first since every supported version of these
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// browsers supports native JSON (and we can compile away large chunks of
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// code for individual fragments by setting the appropriate compiler flags).
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goog.userAgent.WEBKIT || goog.userAgent.OPERA ||
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(goog.userAgent.GECKO && bot.userAgent.isEngineVersion(3.5)) ||
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(goog.userAgent.IE && bot.userAgent.isEngineVersion(8));
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/**
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* Converts a JSON object to its string representation.
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* @param {*} jsonObj The input object.
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* @param {?(function(string, *): *)=} opt_replacer A replacer function called
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* for each (key, value) pair that determines how the value should be
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* serialized. By default, this just returns the value and allows default
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* serialization to kick in.
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* @return {string} A JSON string representation of the input object.
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*/
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bot.json.stringify = bot.json.NATIVE_JSON && bot.json.SUPPORTS_NATIVE_JSON_ ?
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JSON.stringify : goog.json.serialize;
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/**
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* Parses a JSON string and returns the result.
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* @param {string} jsonStr The string to parse.
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* @return {*} The JSON object.
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* @throws {Error} If the input string is an invalid JSON string.
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*/
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bot.json.parse = bot.json.NATIVE_JSON && bot.json.SUPPORTS_NATIVE_JSON_ ?
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JSON.parse : goog.json.parse;
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