happstack-yui-7371.5.0: bundle/json-stringify/json-stringify-coverage.js
/*
YUI 3.7.1 (build 5627)
Copyright 2012 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
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YUI.add('json-stringify', function (Y, NAME) {
/**
* Provides Y.JSON.stringify method for converting objects to JSON strings.
*
* @module json
* @submodule json-stringify
* @for JSON
* @static
*/
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var _JSON = (Y.config.win || {}).JSON,
Lang = Y.Lang,
isFunction= Lang.isFunction,
isObject = Lang.isObject,
isArray = Lang.isArray,
_toStr = Object.prototype.toString,
Native = (_toStr.call(_JSON) === '[object JSON]' && _JSON),
useNative = !!Native,
UNDEFINED = 'undefined',
OBJECT = 'object',
NULL = 'null',
STRING = 'string',
NUMBER = 'number',
BOOLEAN = 'boolean',
DATE = 'date',
_allowable= {
'undefined' : UNDEFINED,
'string' : STRING,
'[object String]' : STRING,
'number' : NUMBER,
'[object Number]' : NUMBER,
'boolean' : BOOLEAN,
'[object Boolean]' : BOOLEAN,
'[object Date]' : DATE,
'[object RegExp]' : OBJECT
},
EMPTY = '',
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CLOSE_O = '}',
OPEN_A = '[',
CLOSE_A = ']',
COMMA = ',',
COMMA_CR = ",\n",
CR = "\n",
COLON = ':',
COLON_SP = ': ',
QUOTE = '"',
// Regex used to capture characters that need escaping before enclosing
// their containing string in quotes.
_SPECIAL = /[\x00-\x07\x0b\x0e-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
// Character substitution map for common escapes and special characters.
_COMMON = [
[/\\/g, '\\\\'],
[/\"/g, '\\"'],
[/\x08/g, '\\b'],
[/\x09/g, '\\t'],
[/\x0a/g, '\\n'],
[/\x0c/g, '\\f'],
[/\x0d/g, '\\r']
],
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// In-process optimization for special character escapes that haven't yet
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// Per-char counter to determine if it's worth fast tracking a special
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_allowable[_toStr.call(o)] || // Number, String, Boolean, Date
(t === OBJECT ?
(o ? OBJECT : NULL) : // object, array, null, misc natives
UNDEFINED); // function, unknown
}
// Escapes a special character to a safe Unicode representation
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function _char(c) {
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_CHAR[c] = '\\u'+('0000'+(+(c.charCodeAt(0))).toString(16)).slice(-4);
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}
// === to avoid this conditional for the remainder of the current operation
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// Enclose escaped strings in quotes
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function _string(s) {
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var i, chr;
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for (i = 0; i < _COMMON_LENGTH; i++) {
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s = s.replace(chr[0], chr[1]);
}
// original function replace for the not-as-common set of chars
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return QUOTE + s.replace(_SPECIAL, _char) + QUOTE;
}
// Adds the provided space to the beginning of every line in the input string
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function _indent(s,space) {
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// JavaScript implementation of stringify (see API declaration of stringify)
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function _stringify(o,w,space) {
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return undefined;
}
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var replacer = isFunction(w) ? w : null,
format = _toStr.call(space).match(/String|Number/) || [],
_date = Y.JSON.dateToString,
stack = [],
tmp,i,len;
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if (replacer || !isArray(w)) {
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w = undefined;
}
// Ensure whitelist keys are unique (bug 2110391)
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if (w) {
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for (i = 0, len = w.length; i < len; ++i) {
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tmp[w[i]] = true;
}
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w = tmp;
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// Per the spec, strings are truncated to 10 characters and numbers
// are converted to that number of spaces (max 10)
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new Array(Math.min(Math.max(0,space),10)+1).join(" ") :
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function _serialize(h,key) {
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var value = h[key],
t = _type(value),
a = [],
colon = space ? COLON_SP : COLON,
arr, i, keys, k, v;
// Per the ECMA 5 spec, toJSON is applied before the replacer is
// called. Also per the spec, Date.prototype.toJSON has been added, so
// Date instances should be serialized prior to exposure to the
// replacer. I disagree with this decision, but the spec is the spec.
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if (isObject(value) && isFunction(value.toJSON)) {
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value = value.toJSON(key);
} else {_yuitest_coverline("build/json-stringify/json-stringify.js", 166);
if (t === DATE) {
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value = _date(value);
}}
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if (isFunction(replacer)) {
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value = replacer.call(h,key,value);
}
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if (value !== h[key]) {
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t = _type(value);
}
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switch (t) {
case DATE : // intentional fallthrough. Pre-replacer Dates are
// serialized in the toJSON stage. Dates here would
// have been produced by the replacer.
case OBJECT : _yuitest_coverline("build/json-stringify/json-stringify.js", 182);
break;
case STRING : _yuitest_coverline("build/json-stringify/json-stringify.js", 183);
return _string(value);
case NUMBER : _yuitest_coverline("build/json-stringify/json-stringify.js", 184);
return isFinite(value) ? value+EMPTY : NULL;
case BOOLEAN : _yuitest_coverline("build/json-stringify/json-stringify.js", 185);
return value+EMPTY;
case NULL : _yuitest_coverline("build/json-stringify/json-stringify.js", 186);
return NULL;
default : _yuitest_coverline("build/json-stringify/json-stringify.js", 187);
return undefined;
}
// Check for cyclical references in nested objects
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for (i = stack.length - 1; i >= 0; --i) {
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if (stack[i] === value) {
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throw new Error("JSON.stringify. Cyclical reference");
}
}
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arr = isArray(value);
// Add the object to the processing stack
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stack.push(value);
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if (arr) { // Array
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for (i = value.length - 1; i >= 0; --i) {
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a[i] = _serialize(value, i) || NULL;
}
} else { // Object
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keys = w || value;
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i = 0;
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for (k in keys) {
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if (keys.hasOwnProperty(k)) {
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v = _serialize(value, k);
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if (v) {
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a[i++] = _string(k) + colon + v;
}
}
}
}
// remove the array from the stack
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stack.pop();
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if (space && a.length) {
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return arr ?
OPEN_A + CR + _indent(a.join(COMMA_CR), space) + CR + CLOSE_A :
OPEN_O + CR + _indent(a.join(COMMA_CR), space) + CR + CLOSE_O;
} else {
_yuitest_coverline("build/json-stringify/json-stringify.js", 229);
return arr ?
OPEN_A + a.join(COMMA) + CLOSE_A :
OPEN_O + a.join(COMMA) + CLOSE_O;
}
}
// process the input
_yuitest_coverline("build/json-stringify/json-stringify.js", 236);
return _serialize({'':o},'');
}
// Double check basic native functionality. This is primarily to catch broken
// early JSON API implementations in Firefox 3.1 beta1 and beta2.
_yuitest_coverline("build/json-stringify/json-stringify.js", 241);
if ( Native ) {
_yuitest_coverline("build/json-stringify/json-stringify.js", 242);
try {
_yuitest_coverline("build/json-stringify/json-stringify.js", 243);
useNative = ( '0' === Native.stringify(0) );
} catch ( e ) {
_yuitest_coverline("build/json-stringify/json-stringify.js", 245);
useNative = false;
}
}
_yuitest_coverline("build/json-stringify/json-stringify.js", 249);
Y.mix(Y.namespace('JSON'),{
/**
* Leverage native JSON stringify if the browser has a native
* implementation. In general, this is a good idea. See the Known Issues
* section in the JSON user guide for caveats. The default value is true
* for browsers with native JSON support.
*
* @property useNativeStringify
* @type Boolean
* @default true
* @static
*/
useNativeStringify : useNative,
/**
* Serializes a Date instance as a UTC date string. Used internally by
* stringify. Override this method if you need Dates serialized in a
* different format.
*
* @method dateToString
* @param d {Date} The Date to serialize
* @return {String} stringified Date in UTC format YYYY-MM-DDTHH:mm:SSZ
* @deprecated Use a replacer function
* @static
*/
dateToString : function (d) {
_yuitest_coverfunc("build/json-stringify/json-stringify.js", "dateToString", 274);
_yuitest_coverline("build/json-stringify/json-stringify.js", 275);
function _zeroPad(v) {
_yuitest_coverfunc("build/json-stringify/json-stringify.js", "_zeroPad", 275);
_yuitest_coverline("build/json-stringify/json-stringify.js", 276);
return v < 10 ? '0' + v : v;
}
_yuitest_coverline("build/json-stringify/json-stringify.js", 279);
return d.getUTCFullYear() + '-' +
_zeroPad(d.getUTCMonth() + 1) + '-' +
_zeroPad(d.getUTCDate()) + 'T' +
_zeroPad(d.getUTCHours()) + COLON +
_zeroPad(d.getUTCMinutes()) + COLON +
_zeroPad(d.getUTCSeconds()) + 'Z';
},
/**
* <p>Converts an arbitrary value to a JSON string representation.</p>
*
* <p>Objects with cyclical references will trigger an exception.</p>
*
* <p>If a whitelist is provided, only matching object keys will be
* included. Alternately, a replacer function may be passed as the
* second parameter. This function is executed on every value in the
* input, and its return value will be used in place of the original value.
* This is useful to serialize specialized objects or class instances.</p>
*
* <p>If a positive integer or non-empty string is passed as the third
* parameter, the output will be formatted with carriage returns and
* indentation for readability. If a String is passed (such as "\t") it
* will be used once for each indentation level. If a number is passed,
* that number of spaces will be used.</p>
*
* @method stringify
* @param o {MIXED} any arbitrary value to convert to JSON string
* @param w {Array|Function} (optional) whitelist of acceptable object
* keys to include, or a replacer function to modify the
* raw value before serialization
* @param ind {Number|String} (optional) indentation character or depth of
* spaces to format the output.
* @return {string} JSON string representation of the input
* @static
*/
stringify : function (o,w,ind) {
_yuitest_coverfunc("build/json-stringify/json-stringify.js", "stringify", 314);
_yuitest_coverline("build/json-stringify/json-stringify.js", 315);
return Native && Y.JSON.useNativeStringify ?
Native.stringify(o,w,ind) : _stringify(o,w,ind);
},
/**
* <p>Number of occurrences of a special character within a single call to
* stringify that should trigger promotion of that character to a dedicated
* preprocess step for future calls. This is only used in environments
* that don't support native JSON, or when useNativeStringify is set to
* false.</p>
*
* <p>So, if set to 50 and an object is passed to stringify that includes
* strings containing the special character \x07 more than 50 times,
* subsequent calls to stringify will process object strings through a
* faster serialization path for \x07 before using the generic, slower,
* replacement process for all special characters.</p>
*
* <p>To prime the preprocessor cache, set this value to 1, then call
* <code>Y.JSON.stringify("<em>(all special characters to
* cache)</em>");</code>, then return this setting to a more conservative
* value.</p>
*
* <p>Special characters \ " \b \t \n \f \r are already cached.</p>
*
* @property charCacheThreshold
* @static
* @default 100
* @type {Number}
*/
charCacheThreshold: 100
});
}, '3.7.1', {"requires": ["yui-base"]});