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| 1ac2bc | 1 | // Copyright 2009-2012 by contributors, MIT License |
| 懒 | 2 | // vim: ts=4 sts=4 sw=4 expandtab |
| 3 | ||
| 4 | // Module systems magic dance | |
| 5 | (function (definition) { | |
| 6 | // RequireJS | |
| 7 | if (typeof define == "function") { | |
| 8 | define(definition); | |
| 9 | // YUI3 | |
| 10 | } else if (typeof YUI == "function") { | |
| 11 | YUI.add("es5", definition); | |
| 12 | // CommonJS and <script> | |
| 13 | } else { | |
| 14 | definition(); | |
| 15 | } | |
| 16 | })(function () { | |
| 17 | ||
| 18 | /** | |
| 19 | * Brings an environment as close to ECMAScript 5 compliance | |
| 20 | * as is possible with the facilities of erstwhile engines. | |
| 21 | * | |
| 22 | * Annotated ES5: http://es5.github.com/ (specific links below) | |
| 23 | * ES5 Spec: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf | |
| 24 | * Required reading: http://javascriptweblog.wordpress.com/2011/12/05/extending-javascript-natives/ | |
| 25 | */ | |
| 26 | ||
| 27 | // | |
| 28 | // Function | |
| 29 | // ======== | |
| 30 | // | |
| 31 | ||
| 32 | // ES-5 15.3.4.5 | |
| 33 | // http://es5.github.com/#x15.3.4.5 | |
| 34 | ||
| 35 | function Empty() {} | |
| 36 | ||
| 37 | if (!Function.prototype.bind) { | |
| 38 | Function.prototype.bind = function bind(that) { // .length is 1 | |
| 39 | // 1. Let Target be the this value. | |
| 40 | var target = this; | |
| 41 | // 2. If IsCallable(Target) is false, throw a TypeError exception. | |
| 42 | if (typeof target != "function") { | |
| 43 | throw new TypeError("Function.prototype.bind called on incompatible " + target); | |
| 44 | } | |
| 45 | // 3. Let A be a new (possibly empty) internal list of all of the | |
| 46 | // argument values provided after thisArg (arg1, arg2 etc), in order. | |
| 47 | // XXX slicedArgs will stand in for "A" if used | |
| 48 | var args = _Array_slice_.call(arguments, 1); // for normal call | |
| 49 | // 4. Let F be a new native ECMAScript object. | |
| 50 | // 11. Set the [[Prototype]] internal property of F to the standard | |
| 51 | // built-in Function prototype object as specified in 15.3.3.1. | |
| 52 | // 12. Set the [[Call]] internal property of F as described in | |
| 53 | // 15.3.4.5.1. | |
| 54 | // 13. Set the [[Construct]] internal property of F as described in | |
| 55 | // 15.3.4.5.2. | |
| 56 | // 14. Set the [[HasInstance]] internal property of F as described in | |
| 57 | // 15.3.4.5.3. | |
| 58 | var bound = function () { | |
| 59 | ||
| 60 | if (this instanceof bound) { | |
| 61 | // 15.3.4.5.2 [[Construct]] | |
| 62 | // When the [[Construct]] internal method of a function object, | |
| 63 | // F that was created using the bind function is called with a | |
| 64 | // list of arguments ExtraArgs, the following steps are taken: | |
| 65 | // 1. Let target be the value of F's [[TargetFunction]] | |
| 66 | // internal property. | |
| 67 | // 2. If target has no [[Construct]] internal method, a | |
| 68 | // TypeError exception is thrown. | |
| 69 | // 3. Let boundArgs be the value of F's [[BoundArgs]] internal | |
| 70 | // property. | |
| 71 | // 4. Let args be a new list containing the same values as the | |
| 72 | // list boundArgs in the same order followed by the same | |
| 73 | // values as the list ExtraArgs in the same order. | |
| 74 | // 5. Return the result of calling the [[Construct]] internal | |
| 75 | // method of target providing args as the arguments. | |
| 76 | ||
| 77 | var result = target.apply( | |
| 78 | this, | |
| 79 | args.concat(_Array_slice_.call(arguments)) | |
| 80 | ); | |
| 81 | if (Object(result) === result) { | |
| 82 | return result; | |
| 83 | } | |
| 84 | return this; | |
| 85 | ||
| 86 | } else { | |
| 87 | // 15.3.4.5.1 [[Call]] | |
| 88 | // When the [[Call]] internal method of a function object, F, | |
| 89 | // which was created using the bind function is called with a | |
| 90 | // this value and a list of arguments ExtraArgs, the following | |
| 91 | // steps are taken: | |
| 92 | // 1. Let boundArgs be the value of F's [[BoundArgs]] internal | |
| 93 | // property. | |
| 94 | // 2. Let boundThis be the value of F's [[BoundThis]] internal | |
| 95 | // property. | |
| 96 | // 3. Let target be the value of F's [[TargetFunction]] internal | |
| 97 | // property. | |
| 98 | // 4. Let args be a new list containing the same values as the | |
| 99 | // list boundArgs in the same order followed by the same | |
| 100 | // values as the list ExtraArgs in the same order. | |
| 101 | // 5. Return the result of calling the [[Call]] internal method | |
| 102 | // of target providing boundThis as the this value and | |
| 103 | // providing args as the arguments. | |
| 104 | ||
| 105 | // equiv: target.call(this, ...boundArgs, ...args) | |
| 106 | return target.apply( | |
| 107 | that, | |
| 108 | args.concat(_Array_slice_.call(arguments)) | |
| 109 | ); | |
| 110 | ||
| 111 | } | |
| 112 | ||
| 113 | }; | |
| 114 | if(target.prototype) { | |
| 115 | Empty.prototype = target.prototype; | |
| 116 | bound.prototype = new Empty(); | |
| 117 | // Clean up dangling references. | |
| 118 | Empty.prototype = null; | |
| 119 | } | |
| 120 | // XXX bound.length is never writable, so don't even try | |
| 121 | // | |
| 122 | // 15. If the [[Class]] internal property of Target is "Function", then | |
| 123 | // a. Let L be the length property of Target minus the length of A. | |
| 124 | // b. Set the length own property of F to either 0 or L, whichever is | |
| 125 | // larger. | |
| 126 | // 16. Else set the length own property of F to 0. | |
| 127 | // 17. Set the attributes of the length own property of F to the values | |
| 128 | // specified in 15.3.5.1. | |
| 129 | ||
| 130 | // TODO | |
| 131 | // 18. Set the [[Extensible]] internal property of F to true. | |
| 132 | ||
| 133 | // TODO | |
| 134 | // 19. Let thrower be the [[ThrowTypeError]] function Object (13.2.3). | |
| 135 | // 20. Call the [[DefineOwnProperty]] internal method of F with | |
| 136 | // arguments "caller", PropertyDescriptor {[[Get]]: thrower, [[Set]]: | |
| 137 | // thrower, [[Enumerable]]: false, [[Configurable]]: false}, and | |
| 138 | // false. | |
| 139 | // 21. Call the [[DefineOwnProperty]] internal method of F with | |
| 140 | // arguments "arguments", PropertyDescriptor {[[Get]]: thrower, | |
| 141 | // [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: false}, | |
| 142 | // and false. | |
| 143 | ||
| 144 | // TODO | |
| 145 | // NOTE Function objects created using Function.prototype.bind do not | |
| 146 | // have a prototype property or the [[Code]], [[FormalParameters]], and | |
| 147 | // [[Scope]] internal properties. | |
| 148 | // XXX can't delete prototype in pure-js. | |
| 149 | ||
| 150 | // 22. Return F. | |
| 151 | return bound; | |
| 152 | }; | |
| 153 | } | |
| 154 | ||
| 155 | // Shortcut to an often accessed properties, in order to avoid multiple | |
| 156 | // dereference that costs universally. | |
| 157 | // _Please note: Shortcuts are defined after `Function.prototype.bind` as we | |
| 158 | // us it in defining shortcuts. | |
| 159 | var call = Function.prototype.call; | |
| 160 | var prototypeOfArray = Array.prototype; | |
| 161 | var prototypeOfObject = Object.prototype; | |
| 162 | var _Array_slice_ = prototypeOfArray.slice; | |
| 163 | // Having a toString local variable name breaks in Opera so use _toString. | |
| 164 | var _toString = call.bind(prototypeOfObject.toString); | |
| 165 | var owns = call.bind(prototypeOfObject.hasOwnProperty); | |
| 166 | ||
| 167 | // If JS engine supports accessors creating shortcuts. | |
| 168 | var defineGetter; | |
| 169 | var defineSetter; | |
| 170 | var lookupGetter; | |
| 171 | var lookupSetter; | |
| 172 | var supportsAccessors; | |
| 173 | if ((supportsAccessors = owns(prototypeOfObject, "__defineGetter__"))) { | |
| 174 | defineGetter = call.bind(prototypeOfObject.__defineGetter__); | |
| 175 | defineSetter = call.bind(prototypeOfObject.__defineSetter__); | |
| 176 | lookupGetter = call.bind(prototypeOfObject.__lookupGetter__); | |
| 177 | lookupSetter = call.bind(prototypeOfObject.__lookupSetter__); | |
| 178 | } | |
| 179 | ||
| 180 | // | |
| 181 | // Array | |
| 182 | // ===== | |
| 183 | // | |
| 184 | ||
| 185 | // ES5 15.4.4.12 | |
| 186 | // http://es5.github.com/#x15.4.4.12 | |
| 187 | // Default value for second param | |
| 188 | // [bugfix, ielt9, old browsers] | |
| 189 | // IE < 9 bug: [1,2].splice(0).join("") == "" but should be "12" | |
| 190 | if ([1,2].splice(0).length != 2) { | |
| 191 | var array_splice = Array.prototype.splice; | |
| 192 | ||
| 193 | if(function() { // test IE < 9 to splice bug - see issue #138 | |
| 194 | function makeArray(l) { | |
| 195 | var a = []; | |
| 196 | while (l--) { | |
| 197 | a.unshift(l) | |
| 198 | } | |
| 199 | return a | |
| 200 | } | |
| 201 | ||
| 202 | var array = [] | |
| 203 | , lengthBefore | |
| 204 | ; | |
| 205 | ||
| 206 | array.splice.bind(array, 0, 0).apply(null, makeArray(20)); | |
| 207 | array.splice.bind(array, 0, 0).apply(null, makeArray(26)); | |
| 208 | ||
| 209 | lengthBefore = array.length; //20 | |
| 210 | array.splice(5, 0, "XXX"); // add one element | |
| 211 | ||
| 212 | if(lengthBefore + 1 == array.length) { | |
| 213 | return true;// has right splice implementation without bugs | |
| 214 | } | |
| 215 | // else { | |
| 216 | // IE8 bug | |
| 217 | // } | |
| 218 | }()) {//IE 6/7 | |
| 219 | Array.prototype.splice = function(start, deleteCount) { | |
| 220 | if (!arguments.length) { | |
| 221 | return []; | |
| 222 | } else { | |
| 223 | return array_splice.apply(this, [ | |
| 224 | start === void 0 ? 0 : start, | |
| 225 | deleteCount === void 0 ? (this.length - start) : deleteCount | |
| 226 | ].concat(_Array_slice_.call(arguments, 2))) | |
| 227 | } | |
| 228 | }; | |
| 229 | } | |
| 230 | else {//IE8 | |
| 231 | Array.prototype.splice = function(start, deleteCount) { | |
| 232 | var result | |
| 233 | , args = _Array_slice_.call(arguments, 2) | |
| 234 | , addElementsCount = args.length | |
| 235 | ; | |
| 236 | ||
| 237 | if(!arguments.length) { | |
| 238 | return []; | |
| 239 | } | |
| 240 | ||
| 241 | if(start === void 0) { // default | |
| 242 | start = 0; | |
| 243 | } | |
| 244 | if(deleteCount === void 0) { // default | |
| 245 | deleteCount = this.length - start; | |
| 246 | } | |
| 247 | ||
| 248 | if(addElementsCount > 0) { | |
| 249 | if(deleteCount <= 0) { | |
| 250 | if(start == this.length) { // tiny optimisation #1 | |
| 251 | this.push.apply(this, args); | |
| 252 | return []; | |
| 253 | } | |
| 254 | ||
| 255 | if(start == 0) { // tiny optimisation #2 | |
| 256 | this.unshift.apply(this, args); | |
| 257 | return []; | |
| 258 | } | |
| 259 | } | |
| 260 | ||
| 261 | // Array.prototype.splice implementation | |
| 262 | result = _Array_slice_.call(this, start, start + deleteCount);// delete part | |
| 263 | args.push.apply(args, _Array_slice_.call(this, start + deleteCount, this.length));// right part | |
| 264 | args.unshift.apply(args, _Array_slice_.call(this, 0, start));// left part | |
| 265 | ||
| 266 | // delete all items from this array and replace it to 'left part' + _Array_slice_.call(arguments, 2) + 'right part' | |
| 267 | args.unshift(0, this.length); | |
| 268 | ||
| 269 | array_splice.apply(this, args); | |
| 270 | ||
| 271 | return result; | |
| 272 | } | |
| 273 | ||
| 274 | return array_splice.call(this, start, deleteCount); | |
| 275 | } | |
| 276 | ||
| 277 | } | |
| 278 | } | |
| 279 | ||
| 280 | // ES5 15.4.4.12 | |
| 281 | // http://es5.github.com/#x15.4.4.13 | |
| 282 | // Return len+argCount. | |
| 283 | // [bugfix, ielt8] | |
| 284 | // IE < 8 bug: [].unshift(0) == undefined but should be "1" | |
| 285 | if ([].unshift(0) != 1) { | |
| 286 | var array_unshift = Array.prototype.unshift; | |
| 287 | Array.prototype.unshift = function() { | |
| 288 | array_unshift.apply(this, arguments); | |
| 289 | return this.length; | |
| 290 | }; | |
| 291 | } | |
| 292 | ||
| 293 | // ES5 15.4.3.2 | |
| 294 | // http://es5.github.com/#x15.4.3.2 | |
| 295 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/isArray | |
| 296 | if (!Array.isArray) { | |
| 297 | Array.isArray = function isArray(obj) { | |
| 298 | return _toString(obj) == "[object Array]"; | |
| 299 | }; | |
| 300 | } | |
| 301 | ||
| 302 | // The IsCallable() check in the Array functions | |
| 303 | // has been replaced with a strict check on the | |
| 304 | // internal class of the object to trap cases where | |
| 305 | // the provided function was actually a regular | |
| 306 | // expression literal, which in V8 and | |
| 307 | // JavaScriptCore is a typeof "function". Only in | |
| 308 | // V8 are regular expression literals permitted as | |
| 309 | // reduce parameters, so it is desirable in the | |
| 310 | // general case for the shim to match the more | |
| 311 | // strict and common behavior of rejecting regular | |
| 312 | // expressions. | |
| 313 | ||
| 314 | // ES5 15.4.4.18 | |
| 315 | // http://es5.github.com/#x15.4.4.18 | |
| 316 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/forEach | |
| 317 | ||
| 318 | // Check failure of by-index access of string characters (IE < 9) | |
| 319 | // and failure of `0 in boxedString` (Rhino) | |
| 320 | var boxedString = Object("a"), | |
| 321 | splitString = boxedString[0] != "a" || !(0 in boxedString); | |
| 322 | ||
| 323 | if (!Array.prototype.forEach) { | |
| 324 | Array.prototype.forEach = function forEach(fun /*, thisp*/) { | |
| 325 | var object = toObject(this), | |
| 326 | self = splitString && _toString(this) == "[object String]" ? | |
| 327 | this.split("") : | |
| 328 | object, | |
| 329 | thisp = arguments[1], | |
| 330 | i = -1, | |
| 331 | length = self.length >>> 0; | |
| 332 | ||
| 333 | // If no callback function or if callback is not a callable function | |
| 334 | if (_toString(fun) != "[object Function]") { | |
| 335 | throw new TypeError(); // TODO message | |
| 336 | } | |
| 337 | ||
| 338 | while (++i < length) { | |
| 339 | if (i in self) { | |
| 340 | // Invoke the callback function with call, passing arguments: | |
| 341 | // context, property value, property key, thisArg object | |
| 342 | // context | |
| 343 | fun.call(thisp, self[i], i, object); | |
| 344 | } | |
| 345 | } | |
| 346 | }; | |
| 347 | } | |
| 348 | ||
| 349 | // ES5 15.4.4.19 | |
| 350 | // http://es5.github.com/#x15.4.4.19 | |
| 351 | // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/map | |
| 352 | if (!Array.prototype.map) { | |
| 353 | Array.prototype.map = function map(fun /*, thisp*/) { | |
| 354 | var object = toObject(this), | |
| 355 | self = splitString && _toString(this) == "[object String]" ? | |
| 356 | this.split("") : | |
| 357 | object, | |
| 358 | length = self.length >>> 0, | |
| 359 | result = Array(length), | |
| 360 | thisp = arguments[1]; | |
| 361 | ||
| 362 | // If no callback function or if callback is not a callable function | |
| 363 | if (_toString(fun) != "[object Function]") { | |
| 364 | throw new TypeError(fun + " is not a function"); | |
| 365 | } | |
| 366 | ||
| 367 | for (var i = 0; i < length; i++) { | |
| 368 | if (i in self) | |
| 369 | result[i] = fun.call(thisp, self[i], i, object); | |
| 370 | } | |
| 371 | return result; | |
| 372 | }; | |
| 373 | } | |
| 374 | ||
| 375 | // ES5 15.4.4.20 | |
| 376 | // http://es5.github.com/#x15.4.4.20 | |
| 377 | // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/filter | |
| 378 | if (!Array.prototype.filter) { | |
| 379 | Array.prototype.filter = function filter(fun /*, thisp */) { | |
| 380 | var object = toObject(this), | |
| 381 | self = splitString && _toString(this) == "[object String]" ? | |
| 382 | this.split("") : | |
| 383 | object, | |
| 384 | length = self.length >>> 0, | |
| 385 | result = [], | |
| 386 | value, | |
| 387 | thisp = arguments[1]; | |
| 388 | ||
| 389 | // If no callback function or if callback is not a callable function | |
| 390 | if (_toString(fun) != "[object Function]") { | |
| 391 | throw new TypeError(fun + " is not a function"); | |
| 392 | } | |
| 393 | ||
| 394 | for (var i = 0; i < length; i++) { | |
| 395 | if (i in self) { | |
| 396 | value = self[i]; | |
| 397 | if (fun.call(thisp, value, i, object)) { | |
| 398 | result.push(value); | |
| 399 | } | |
| 400 | } | |
| 401 | } | |
| 402 | return result; | |
| 403 | }; | |
| 404 | } | |
| 405 | ||
| 406 | // ES5 15.4.4.16 | |
| 407 | // http://es5.github.com/#x15.4.4.16 | |
| 408 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/every | |
| 409 | if (!Array.prototype.every) { | |
| 410 | Array.prototype.every = function every(fun /*, thisp */) { | |
| 411 | var object = toObject(this), | |
| 412 | self = splitString && _toString(this) == "[object String]" ? | |
| 413 | this.split("") : | |
| 414 | object, | |
| 415 | length = self.length >>> 0, | |
| 416 | thisp = arguments[1]; | |
| 417 | ||
| 418 | // If no callback function or if callback is not a callable function | |
| 419 | if (_toString(fun) != "[object Function]") { | |
| 420 | throw new TypeError(fun + " is not a function"); | |
| 421 | } | |
| 422 | ||
| 423 | for (var i = 0; i < length; i++) { | |
| 424 | if (i in self && !fun.call(thisp, self[i], i, object)) { | |
| 425 | return false; | |
| 426 | } | |
| 427 | } | |
| 428 | return true; | |
| 429 | }; | |
| 430 | } | |
| 431 | ||
| 432 | // ES5 15.4.4.17 | |
| 433 | // http://es5.github.com/#x15.4.4.17 | |
| 434 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/some | |
| 435 | if (!Array.prototype.some) { | |
| 436 | Array.prototype.some = function some(fun /*, thisp */) { | |
| 437 | var object = toObject(this), | |
| 438 | self = splitString && _toString(this) == "[object String]" ? | |
| 439 | this.split("") : | |
| 440 | object, | |
| 441 | length = self.length >>> 0, | |
| 442 | thisp = arguments[1]; | |
| 443 | ||
| 444 | // If no callback function or if callback is not a callable function | |
| 445 | if (_toString(fun) != "[object Function]") { | |
| 446 | throw new TypeError(fun + " is not a function"); | |
| 447 | } | |
| 448 | ||
| 449 | for (var i = 0; i < length; i++) { | |
| 450 | if (i in self && fun.call(thisp, self[i], i, object)) { | |
| 451 | return true; | |
| 452 | } | |
| 453 | } | |
| 454 | return false; | |
| 455 | }; | |
| 456 | } | |
| 457 | ||
| 458 | // ES5 15.4.4.21 | |
| 459 | // http://es5.github.com/#x15.4.4.21 | |
| 460 | // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduce | |
| 461 | if (!Array.prototype.reduce) { | |
| 462 | Array.prototype.reduce = function reduce(fun /*, initial*/) { | |
| 463 | var object = toObject(this), | |
| 464 | self = splitString && _toString(this) == "[object String]" ? | |
| 465 | this.split("") : | |
| 466 | object, | |
| 467 | length = self.length >>> 0; | |
| 468 | ||
| 469 | // If no callback function or if callback is not a callable function | |
| 470 | if (_toString(fun) != "[object Function]") { | |
| 471 | throw new TypeError(fun + " is not a function"); | |
| 472 | } | |
| 473 | ||
| 474 | // no value to return if no initial value and an empty array | |
| 475 | if (!length && arguments.length == 1) { | |
| 476 | throw new TypeError("reduce of empty array with no initial value"); | |
| 477 | } | |
| 478 | ||
| 479 | var i = 0; | |
| 480 | var result; | |
| 481 | if (arguments.length >= 2) { | |
| 482 | result = arguments[1]; | |
| 483 | } else { | |
| 484 | do { | |
| 485 | if (i in self) { | |
| 486 | result = self[i++]; | |
| 487 | break; | |
| 488 | } | |
| 489 | ||
| 490 | // if array contains no values, no initial value to return | |
| 491 | if (++i >= length) { | |
| 492 | throw new TypeError("reduce of empty array with no initial value"); | |
| 493 | } | |
| 494 | } while (true); | |
| 495 | } | |
| 496 | ||
| 497 | for (; i < length; i++) { | |
| 498 | if (i in self) { | |
| 499 | result = fun.call(void 0, result, self[i], i, object); | |
| 500 | } | |
| 501 | } | |
| 502 | ||
| 503 | return result; | |
| 504 | }; | |
| 505 | } | |
| 506 | ||
| 507 | // ES5 15.4.4.22 | |
| 508 | // http://es5.github.com/#x15.4.4.22 | |
| 509 | // https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/reduceRight | |
| 510 | if (!Array.prototype.reduceRight) { | |
| 511 | Array.prototype.reduceRight = function reduceRight(fun /*, initial*/) { | |
| 512 | var object = toObject(this), | |
| 513 | self = splitString && _toString(this) == "[object String]" ? | |
| 514 | this.split("") : | |
| 515 | object, | |
| 516 | length = self.length >>> 0; | |
| 517 | ||
| 518 | // If no callback function or if callback is not a callable function | |
| 519 | if (_toString(fun) != "[object Function]") { | |
| 520 | throw new TypeError(fun + " is not a function"); | |
| 521 | } | |
| 522 | ||
| 523 | // no value to return if no initial value, empty array | |
| 524 | if (!length && arguments.length == 1) { | |
| 525 | throw new TypeError("reduceRight of empty array with no initial value"); | |
| 526 | } | |
| 527 | ||
| 528 | var result, i = length - 1; | |
| 529 | if (arguments.length >= 2) { | |
| 530 | result = arguments[1]; | |
| 531 | } else { | |
| 532 | do { | |
| 533 | if (i in self) { | |
| 534 | result = self[i--]; | |
| 535 | break; | |
| 536 | } | |
| 537 | ||
| 538 | // if array contains no values, no initial value to return | |
| 539 | if (--i < 0) { | |
| 540 | throw new TypeError("reduceRight of empty array with no initial value"); | |
| 541 | } | |
| 542 | } while (true); | |
| 543 | } | |
| 544 | ||
| 545 | if (i < 0) { | |
| 546 | return result; | |
| 547 | } | |
| 548 | ||
| 549 | do { | |
| 550 | if (i in this) { | |
| 551 | result = fun.call(void 0, result, self[i], i, object); | |
| 552 | } | |
| 553 | } while (i--); | |
| 554 | ||
| 555 | return result; | |
| 556 | }; | |
| 557 | } | |
| 558 | ||
| 559 | // ES5 15.4.4.14 | |
| 560 | // http://es5.github.com/#x15.4.4.14 | |
| 561 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf | |
| 562 | if (!Array.prototype.indexOf || ([0, 1].indexOf(1, 2) != -1)) { | |
| 563 | Array.prototype.indexOf = function indexOf(sought /*, fromIndex */ ) { | |
| 564 | var self = splitString && _toString(this) == "[object String]" ? | |
| 565 | this.split("") : | |
| 566 | toObject(this), | |
| 567 | length = self.length >>> 0; | |
| 568 | ||
| 569 | if (!length) { | |
| 570 | return -1; | |
| 571 | } | |
| 572 | ||
| 573 | var i = 0; | |
| 574 | if (arguments.length > 1) { | |
| 575 | i = toInteger(arguments[1]); | |
| 576 | } | |
| 577 | ||
| 578 | // handle negative indices | |
| 579 | i = i >= 0 ? i : Math.max(0, length + i); | |
| 580 | for (; i < length; i++) { | |
| 581 | if (i in self && self[i] === sought) { | |
| 582 | return i; | |
| 583 | } | |
| 584 | } | |
| 585 | return -1; | |
| 586 | }; | |
| 587 | } | |
| 588 | ||
| 589 | // ES5 15.4.4.15 | |
| 590 | // http://es5.github.com/#x15.4.4.15 | |
| 591 | // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf | |
| 592 | if (!Array.prototype.lastIndexOf || ([0, 1].lastIndexOf(0, -3) != -1)) { | |
| 593 | Array.prototype.lastIndexOf = function lastIndexOf(sought /*, fromIndex */) { | |
| 594 | var self = splitString && _toString(this) == "[object String]" ? | |
| 595 | this.split("") : | |
| 596 | toObject(this), | |
| 597 | length = self.length >>> 0; | |
| 598 | ||
| 599 | if (!length) { | |
| 600 | return -1; | |
| 601 | } | |
| 602 | var i = length - 1; | |
| 603 | if (arguments.length > 1) { | |
| 604 | i = Math.min(i, toInteger(arguments[1])); | |
| 605 | } | |
| 606 | // handle negative indices | |
| 607 | i = i >= 0 ? i : length - Math.abs(i); | |
| 608 | for (; i >= 0; i--) { | |
| 609 | if (i in self && sought === self[i]) { | |
| 610 | return i; | |
| 611 | } | |
| 612 | } | |
| 613 | return -1; | |
| 614 | }; | |
| 615 | } | |
| 616 | ||
| 617 | // | |
| 618 | // Object | |
| 619 | // ====== | |
| 620 | // | |
| 621 | ||
| 622 | // ES5 15.2.3.14 | |
| 623 | // http://es5.github.com/#x15.2.3.14 | |
| 624 | if (!Object.keys) { | |
| 625 | // http://whattheheadsaid.com/2010/10/a-safer-object-keys-compatibility-implementation | |
| 626 | var hasDontEnumBug = true, | |
| 627 | dontEnums = [ | |
| 628 | "toString", | |
| 629 | "toLocaleString", | |
| 630 | "valueOf", | |
| 631 | "hasOwnProperty", | |
| 632 | "isPrototypeOf", | |
| 633 | "propertyIsEnumerable", | |
| 634 | "constructor" | |
| 635 | ], | |
| 636 | dontEnumsLength = dontEnums.length; | |
| 637 | ||
| 638 | for (var key in {"toString": null}) { | |
| 639 | hasDontEnumBug = false; | |
| 640 | } | |
| 641 | ||
| 642 | Object.keys = function keys(object) { | |
| 643 | ||
| 644 | if ( | |
| 645 | (typeof object != "object" && typeof object != "function") || | |
| 646 | object === null | |
| 647 | ) { | |
| 648 | throw new TypeError("Object.keys called on a non-object"); | |
| 649 | } | |
| 650 | ||
| 651 | var keys = []; | |
| 652 | for (var name in object) { | |
| 653 | if (owns(object, name)) { | |
| 654 | keys.push(name); | |
| 655 | } | |
| 656 | } | |
| 657 | ||
| 658 | if (hasDontEnumBug) { | |
| 659 | for (var i = 0, ii = dontEnumsLength; i < ii; i++) { | |
| 660 | var dontEnum = dontEnums[i]; | |
| 661 | if (owns(object, dontEnum)) { | |
| 662 | keys.push(dontEnum); | |
| 663 | } | |
| 664 | } | |
| 665 | } | |
| 666 | return keys; | |
| 667 | }; | |
| 668 | ||
| 669 | } | |
| 670 | ||
| 671 | // | |
| 672 | // Date | |
| 673 | // ==== | |
| 674 | // | |
| 675 | ||
| 676 | // ES5 15.9.5.43 | |
| 677 | // http://es5.github.com/#x15.9.5.43 | |
| 678 | // This function returns a String value represent the instance in time | |
| 679 | // represented by this Date object. The format of the String is the Date Time | |
| 680 | // string format defined in 15.9.1.15. All fields are present in the String. | |
| 681 | // The time zone is always UTC, denoted by the suffix Z. If the time value of | |
| 682 | // this object is not a finite Number a RangeError exception is thrown. | |
| 683 | var negativeDate = -62198755200000, | |
| 684 | negativeYearString = "-000001"; | |
| 685 | if ( | |
| 686 | !Date.prototype.toISOString || | |
| 687 | (new Date(negativeDate).toISOString().indexOf(negativeYearString) === -1) | |
| 688 | ) { | |
| 689 | Date.prototype.toISOString = function toISOString() { | |
| 690 | var result, length, value, year, month; | |
| 691 | if (!isFinite(this)) { | |
| 692 | throw new RangeError("Date.prototype.toISOString called on non-finite value."); | |
| 693 | } | |
| 694 | ||
| 695 | year = this.getUTCFullYear(); | |
| 696 | ||
| 697 | month = this.getUTCMonth(); | |
| 698 | // see https://github.com/kriskowal/es5-shim/issues/111 | |
| 699 | year += Math.floor(month / 12); | |
| 700 | month = (month % 12 + 12) % 12; | |
| 701 | ||
| 702 | // the date time string format is specified in 15.9.1.15. | |
| 703 | result = [month + 1, this.getUTCDate(), | |
| 704 | this.getUTCHours(), this.getUTCMinutes(), this.getUTCSeconds()]; | |
| 705 | year = ( | |
| 706 | (year < 0 ? "-" : (year > 9999 ? "+" : "")) + | |
| 707 | ("00000" + Math.abs(year)) | |
| 708 | .slice(0 <= year && year <= 9999 ? -4 : -6) | |
| 709 | ); | |
| 710 | ||
| 711 | length = result.length; | |
| 712 | while (length--) { | |
| 713 | value = result[length]; | |
| 714 | // pad months, days, hours, minutes, and seconds to have two | |
| 715 | // digits. | |
| 716 | if (value < 10) { | |
| 717 | result[length] = "0" + value; | |
| 718 | } | |
| 719 | } | |
| 720 | // pad milliseconds to have three digits. | |
| 721 | return ( | |
| 722 | year + "-" + result.slice(0, 2).join("-") + | |
| 723 | "T" + result.slice(2).join(":") + "." + | |
| 724 | ("000" + this.getUTCMilliseconds()).slice(-3) + "Z" | |
| 725 | ); | |
| 726 | }; | |
| 727 | } | |
| 728 | ||
| 729 | ||
| 730 | // ES5 15.9.5.44 | |
| 731 | // http://es5.github.com/#x15.9.5.44 | |
| 732 | // This function provides a String representation of a Date object for use by | |
| 733 | // JSON.stringify (15.12.3). | |
| 734 | var dateToJSONIsSupported = false; | |
| 735 | try { | |
| 736 | dateToJSONIsSupported = ( | |
| 737 | Date.prototype.toJSON && | |
| 738 | new Date(NaN).toJSON() === null && | |
| 739 | new Date(negativeDate).toJSON().indexOf(negativeYearString) !== -1 && | |
| 740 | Date.prototype.toJSON.call({ // generic | |
| 741 | toISOString: function () { | |
| 742 | return true; | |
| 743 | } | |
| 744 | }) | |
| 745 | ); | |
| 746 | } catch (e) { | |
| 747 | } | |
| 748 | if (!dateToJSONIsSupported) { | |
| 749 | Date.prototype.toJSON = function toJSON(key) { | |
| 750 | // When the toJSON method is called with argument key, the following | |
| 751 | // steps are taken: | |
| 752 | ||
| 753 | // 1. Let O be the result of calling ToObject, giving it the this | |
| 754 | // value as its argument. | |
| 755 | // 2. Let tv be toPrimitive(O, hint Number). | |
| 756 | var o = Object(this), | |
| 757 | tv = toPrimitive(o), | |
| 758 | toISO; | |
| 759 | // 3. If tv is a Number and is not finite, return null. | |
| 760 | if (typeof tv === "number" && !isFinite(tv)) { | |
| 761 | return null; | |
| 762 | } | |
| 763 | // 4. Let toISO be the result of calling the [[Get]] internal method of | |
| 764 | // O with argument "toISOString". | |
| 765 | toISO = o.toISOString; | |
| 766 | // 5. If IsCallable(toISO) is false, throw a TypeError exception. | |
| 767 | if (typeof toISO != "function") { | |
| 768 | throw new TypeError("toISOString property is not callable"); | |
| 769 | } | |
| 770 | // 6. Return the result of calling the [[Call]] internal method of | |
| 771 | // toISO with O as the this value and an empty argument list. | |
| 772 | return toISO.call(o); | |
| 773 | ||
| 774 | // NOTE 1 The argument is ignored. | |
| 775 | ||
| 776 | // NOTE 2 The toJSON function is intentionally generic; it does not | |
| 777 | // require that its this value be a Date object. Therefore, it can be | |
| 778 | // transferred to other kinds of objects for use as a method. However, | |
| 779 | // it does require that any such object have a toISOString method. An | |
| 780 | // object is free to use the argument key to filter its | |
| 781 | // stringification. | |
| 782 | }; | |
| 783 | } | |
| 784 | ||
| 785 | // ES5 15.9.4.2 | |
| 786 | // http://es5.github.com/#x15.9.4.2 | |
| 787 | // based on work shared by Daniel Friesen (dantman) | |
| 788 | // http://gist.github.com/303249 | |
| 789 | if (!Date.parse || "Date.parse is buggy") { | |
| 790 | // XXX global assignment won't work in embeddings that use | |
| 791 | // an alternate object for the context. | |
| 792 | Date = (function(NativeDate) { | |
| 793 | ||
| 794 | // Date.length === 7 | |
| 795 | function Date(Y, M, D, h, m, s, ms) { | |
| 796 | var length = arguments.length; | |
| 797 | if (this instanceof NativeDate) { | |
| 798 | var date = length == 1 && String(Y) === Y ? // isString(Y) | |
| 799 | // We explicitly pass it through parse: | |
| 800 | new NativeDate(Date.parse(Y)) : | |
| 801 | // We have to manually make calls depending on argument | |
| 802 | // length here | |
| 803 | length >= 7 ? new NativeDate(Y, M, D, h, m, s, ms) : | |
| 804 | length >= 6 ? new NativeDate(Y, M, D, h, m, s) : | |
| 805 | length >= 5 ? new NativeDate(Y, M, D, h, m) : | |
| 806 | length >= 4 ? new NativeDate(Y, M, D, h) : | |
| 807 | length >= 3 ? new NativeDate(Y, M, D) : | |
| 808 | length >= 2 ? new NativeDate(Y, M) : | |
| 809 | length >= 1 ? new NativeDate(Y) : | |
| 810 | new NativeDate(); | |
| 811 | // Prevent mixups with unfixed Date object | |
| 812 | date.constructor = Date; | |
| 813 | return date; | |
| 814 | } | |
| 815 | return NativeDate.apply(this, arguments); | |
| 816 | }; | |
| 817 | ||
| 818 | // 15.9.1.15 Date Time String Format. | |
| 819 | var isoDateExpression = new RegExp("^" + | |
| 820 | "(\\d{4}|[\+\-]\\d{6})" + // four-digit year capture or sign + | |
| 821 | // 6-digit extended year | |
| 822 | "(?:-(\\d{2})" + // optional month capture | |
| 823 | "(?:-(\\d{2})" + // optional day capture | |
| 824 | "(?:" + // capture hours:minutes:seconds.milliseconds | |
| 825 | "T(\\d{2})" + // hours capture | |
| 826 | ":(\\d{2})" + // minutes capture | |
| 827 | "(?:" + // optional :seconds.milliseconds | |
| 828 | ":(\\d{2})" + // seconds capture | |
| 829 | "(?:(\\.\\d{1,}))?" + // milliseconds capture | |
| 830 | ")?" + | |
| 831 | "(" + // capture UTC offset component | |
| 832 | "Z|" + // UTC capture | |
| 833 | "(?:" + // offset specifier +/-hours:minutes | |
| 834 | "([-+])" + // sign capture | |
| 835 | "(\\d{2})" + // hours offset capture | |
| 836 | ":(\\d{2})" + // minutes offset capture | |
| 837 | ")" + | |
| 838 | ")?)?)?)?" + | |
| 839 | "$"); | |
| 840 | ||
| 841 | var months = [ | |
| 842 | 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 | |
| 843 | ]; | |
| 844 | ||
| 845 | function dayFromMonth(year, month) { | |
| 846 | var t = month > 1 ? 1 : 0; | |
| 847 | return ( | |
| 848 | months[month] + | |
| 849 | Math.floor((year - 1969 + t) / 4) - | |
| 850 | Math.floor((year - 1901 + t) / 100) + | |
| 851 | Math.floor((year - 1601 + t) / 400) + | |
| 852 | 365 * (year - 1970) | |
| 853 | ); | |
| 854 | } | |
| 855 | ||
| 856 | // Copy any custom methods a 3rd party library may have added | |
| 857 | for (var key in NativeDate) { | |
| 858 | Date[key] = NativeDate[key]; | |
| 859 | } | |
| 860 | ||
| 861 | // Copy "native" methods explicitly; they may be non-enumerable | |
| 862 | Date.now = NativeDate.now; | |
| 863 | Date.UTC = NativeDate.UTC; | |
| 864 | Date.prototype = NativeDate.prototype; | |
| 865 | Date.prototype.constructor = Date; | |
| 866 | ||
| 867 | // Upgrade Date.parse to handle simplified ISO 8601 strings | |
| 868 | Date.parse = function parse(string) { | |
| 869 | var match = isoDateExpression.exec(string); | |
| 870 | if (match) { | |
| 871 | // parse months, days, hours, minutes, seconds, and milliseconds | |
| 872 | // provide default values if necessary | |
| 873 | // parse the UTC offset component | |
| 874 | var year = Number(match[1]), | |
| 875 | month = Number(match[2] || 1) - 1, | |
| 876 | day = Number(match[3] || 1) - 1, | |
| 877 | hour = Number(match[4] || 0), | |
| 878 | minute = Number(match[5] || 0), | |
| 879 | second = Number(match[6] || 0), | |
| 880 | millisecond = Math.floor(Number(match[7] || 0) * 1000), | |
| 881 | // When time zone is missed, local offset should be used | |
| 882 | // (ES 5.1 bug) | |
| 883 | // see https://bugs.ecmascript.org/show_bug.cgi?id=112 | |
| 884 | offset = !match[4] || match[8] ? | |
| 885 | 0 : Number(new NativeDate(1970, 0)), | |
| 886 | signOffset = match[9] === "-" ? 1 : -1, | |
| 887 | hourOffset = Number(match[10] || 0), | |
| 888 | minuteOffset = Number(match[11] || 0), | |
| 889 | result; | |
| 890 | if ( | |
| 891 | hour < ( | |
| 892 | minute > 0 || second > 0 || millisecond > 0 ? | |
| 893 | 24 : 25 | |
| 894 | ) && | |
| 895 | minute < 60 && second < 60 && millisecond < 1000 && | |
| 896 | month > -1 && month < 12 && hourOffset < 24 && | |
| 897 | minuteOffset < 60 && // detect invalid offsets | |
| 898 | day > -1 && | |
| 899 | day < ( | |
| 900 | dayFromMonth(year, month + 1) - | |
| 901 | dayFromMonth(year, month) | |
| 902 | ) | |
| 903 | ) { | |
| 904 | result = ( | |
| 905 | (dayFromMonth(year, month) + day) * 24 + | |
| 906 | hour + | |
| 907 | hourOffset * signOffset | |
| 908 | ) * 60; | |
| 909 | result = ( | |
| 910 | (result + minute + minuteOffset * signOffset) * 60 + | |
| 911 | second | |
| 912 | ) * 1000 + millisecond + offset; | |
| 913 | if (-8.64e15 <= result && result <= 8.64e15) { | |
| 914 | return result; | |
| 915 | } | |
| 916 | } | |
| 917 | return NaN; | |
| 918 | } | |
| 919 | return NativeDate.parse.apply(this, arguments); | |
| 920 | }; | |
| 921 | ||
| 922 | return Date; | |
| 923 | })(Date); | |
| 924 | } | |
| 925 | ||
| 926 | // ES5 15.9.4.4 | |
| 927 | // http://es5.github.com/#x15.9.4.4 | |
| 928 | if (!Date.now) { | |
| 929 | Date.now = function now() { | |
| 930 | return new Date().getTime(); | |
| 931 | }; | |
| 932 | } | |
| 933 | ||
| 934 | ||
| 935 | // | |
| 936 | // Number | |
| 937 | // ====== | |
| 938 | // | |
| 939 | ||
| 940 | // ES5.1 15.7.4.5 | |
| 941 | // http://es5.github.com/#x15.7.4.5 | |
| 942 | if (!Number.prototype.toFixed || (0.00008).toFixed(3) !== '0.000' || (0.9).toFixed(0) === '0' || (1.255).toFixed(2) !== '1.25' || (1000000000000000128).toFixed(0) !== "1000000000000000128") { | |
| 943 | // Hide these variables and functions | |
| 944 | (function () { | |
| 945 | var base, size, data, i; | |
| 946 | ||
| 947 | base = 1e7; | |
| 948 | size = 6; | |
| 949 | data = [0, 0, 0, 0, 0, 0]; | |
| 950 | ||
| 951 | function multiply(n, c) { | |
| 952 | var i = -1; | |
| 953 | while (++i < size) { | |
| 954 | c += n * data[i]; | |
| 955 | data[i] = c % base; | |
| 956 | c = Math.floor(c / base); | |
| 957 | } | |
| 958 | } | |
| 959 | ||
| 960 | function divide(n) { | |
| 961 | var i = size, c = 0; | |
| 962 | while (--i >= 0) { | |
| 963 | c += data[i]; | |
| 964 | data[i] = Math.floor(c / n); | |
| 965 | c = (c % n) * base; | |
| 966 | } | |
| 967 | } | |
| 968 | ||
| 969 | function toString() { | |
| 970 | var i = size; | |
| 971 | var s = ''; | |
| 972 | while (--i >= 0) { | |
| 973 | if (s !== '' || i === 0 || data[i] !== 0) { | |
| 974 | var t = String(data[i]); | |
| 975 | if (s === '') { | |
| 976 | s = t; | |
| 977 | } else { | |
| 978 | s += '0000000'.slice(0, 7 - t.length) + t; | |
| 979 | } | |
| 980 | } | |
| 981 | } | |
| 982 | return s; | |
| 983 | } | |
| 984 | ||
| 985 | function pow(x, n, acc) { | |
| 986 | return (n === 0 ? acc : (n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc))); | |
| 987 | } | |
| 988 | ||
| 989 | function log(x) { | |
| 990 | var n = 0; | |
| 991 | while (x >= 4096) { | |
| 992 | n += 12; | |
| 993 | x /= 4096; | |
| 994 | } | |
| 995 | while (x >= 2) { | |
| 996 | n += 1; | |
| 997 | x /= 2; | |
| 998 | } | |
| 999 | return n; | |
| 1000 | } | |
| 1001 | ||
| 1002 | Number.prototype.toFixed = function (fractionDigits) { | |
| 1003 | var f, x, s, m, e, z, j, k; | |
| 1004 | ||
| 1005 | // Test for NaN and round fractionDigits down | |
| 1006 | f = Number(fractionDigits); | |
| 1007 | f = f !== f ? 0 : Math.floor(f); | |
| 1008 | ||
| 1009 | if (f < 0 || f > 20) { | |
| 1010 | throw new RangeError("Number.toFixed called with invalid number of decimals"); | |
| 1011 | } | |
| 1012 | ||
| 1013 | x = Number(this); | |
| 1014 | ||
| 1015 | // Test for NaN | |
| 1016 | if (x !== x) { | |
| 1017 | return "NaN"; | |
| 1018 | } | |
| 1019 | ||
| 1020 | // If it is too big or small, return the string value of the number | |
| 1021 | if (x <= -1e21 || x >= 1e21) { | |
| 1022 | return String(x); | |
| 1023 | } | |
| 1024 | ||
| 1025 | s = ""; | |
| 1026 | ||
| 1027 | if (x < 0) { | |
| 1028 | s = "-"; | |
| 1029 | x = -x; | |
| 1030 | } | |
| 1031 | ||
| 1032 | m = "0"; | |
| 1033 | ||
| 1034 | if (x > 1e-21) { | |
| 1035 | // 1e-21 < x < 1e21 | |
| 1036 | // -70 < log2(x) < 70 | |
| 1037 | e = log(x * pow(2, 69, 1)) - 69; | |
| 1038 | z = (e < 0 ? x * pow(2, -e, 1) : x / pow(2, e, 1)); | |
| 1039 | z *= 0x10000000000000; // Math.pow(2, 52); | |
| 1040 | e = 52 - e; | |
| 1041 | ||
| 1042 | // -18 < e < 122 | |
| 1043 | // x = z / 2 ^ e | |
| 1044 | if (e > 0) { | |
| 1045 | multiply(0, z); | |
| 1046 | j = f; | |
| 1047 | ||
| 1048 | while (j >= 7) { | |
| 1049 | multiply(1e7, 0); | |
| 1050 | j -= 7; | |
| 1051 | } | |
| 1052 | ||
| 1053 | multiply(pow(10, j, 1), 0); | |
| 1054 | j = e - 1; | |
| 1055 | ||
| 1056 | while (j >= 23) { | |
| 1057 | divide(1 << 23); | |
| 1058 | j -= 23; | |
| 1059 | } | |
| 1060 | ||
| 1061 | divide(1 << j); | |
| 1062 | multiply(1, 1); | |
| 1063 | divide(2); | |
| 1064 | m = toString(); | |
| 1065 | } else { | |
| 1066 | multiply(0, z); | |
| 1067 | multiply(1 << (-e), 0); | |
| 1068 | m = toString() + '0.00000000000000000000'.slice(2, 2 + f); | |
| 1069 | } | |
| 1070 | } | |
| 1071 | ||
| 1072 | if (f > 0) { | |
| 1073 | k = m.length; | |
| 1074 | ||
| 1075 | if (k <= f) { | |
| 1076 | m = s + '0.0000000000000000000'.slice(0, f - k + 2) + m; | |
| 1077 | } else { | |
| 1078 | m = s + m.slice(0, k - f) + '.' + m.slice(k - f); | |
| 1079 | } | |
| 1080 | } else { | |
| 1081 | m = s + m; | |
| 1082 | } | |
| 1083 | ||
| 1084 | return m; | |
| 1085 | } | |
| 1086 | }()); | |
| 1087 | } | |
| 1088 | ||
| 1089 | ||
| 1090 | // | |
| 1091 | // String | |
| 1092 | // ====== | |
| 1093 | // | |
| 1094 | ||
| 1095 | ||
| 1096 | // ES5 15.5.4.14 | |
| 1097 | // http://es5.github.com/#x15.5.4.14 | |
| 1098 | ||
| 1099 | // [bugfix, IE lt 9, firefox 4, Konqueror, Opera, obscure browsers] | |
| 1100 | // Many browsers do not split properly with regular expressions or they | |
| 1101 | // do not perform the split correctly under obscure conditions. | |
| 1102 | // See http://blog.stevenlevithan.com/archives/cross-browser-split | |
| 1103 | // I've tested in many browsers and this seems to cover the deviant ones: | |
| 1104 | // 'ab'.split(/(?:ab)*/) should be ["", ""], not [""] | |
| 1105 | // '.'.split(/(.?)(.?)/) should be ["", ".", "", ""], not ["", ""] | |
| 1106 | // 'tesst'.split(/(s)*/) should be ["t", undefined, "e", "s", "t"], not | |
| 1107 | // [undefined, "t", undefined, "e", ...] | |
| 1108 | // ''.split(/.?/) should be [], not [""] | |
| 1109 | // '.'.split(/()()/) should be ["."], not ["", "", "."] | |
| 1110 | ||
| 1111 | var string_split = String.prototype.split; | |
| 1112 | if ( | |
| 1113 | 'ab'.split(/(?:ab)*/).length !== 2 || | |
| 1114 | '.'.split(/(.?)(.?)/).length !== 4 || | |
| 1115 | 'tesst'.split(/(s)*/)[1] === "t" || | |
| 1116 | ''.split(/.?/).length === 0 || | |
| 1117 | '.'.split(/()()/).length > 1 | |
| 1118 | ) { | |
| 1119 | (function () { | |
| 1120 | var compliantExecNpcg = /()??/.exec("")[1] === void 0; // NPCG: nonparticipating capturing group | |
| 1121 | ||
| 1122 | String.prototype.split = function (separator, limit) { | |
| 1123 | var string = this; | |
| 1124 | if (separator === void 0 && limit === 0) | |
| 1125 | return []; | |
| 1126 | ||
| 1127 | // If `separator` is not a regex, use native split | |
| 1128 | if (Object.prototype.toString.call(separator) !== "[object RegExp]") { | |
| 1129 | return string_split.apply(this, arguments); | |
| 1130 | } | |
| 1131 | ||
| 1132 | var output = [], | |
| 1133 | flags = (separator.ignoreCase ? "i" : "") + | |
| 1134 | (separator.multiline ? "m" : "") + | |
| 1135 | (separator.extended ? "x" : "") + // Proposed for ES6 | |
| 1136 | (separator.sticky ? "y" : ""), // Firefox 3+ | |
| 1137 | lastLastIndex = 0, | |
| 1138 | // Make `global` and avoid `lastIndex` issues by working with a copy | |
| 1139 | separator = new RegExp(separator.source, flags + "g"), | |
| 1140 | separator2, match, lastIndex, lastLength; | |
| 1141 | string += ""; // Type-convert | |
| 1142 | if (!compliantExecNpcg) { | |
| 1143 | // Doesn't need flags gy, but they don't hurt | |
| 1144 | separator2 = new RegExp("^" + separator.source + "$(?!\\s)", flags); | |
| 1145 | } | |
| 1146 | /* Values for `limit`, per the spec: | |
| 1147 | * If undefined: 4294967295 // Math.pow(2, 32) - 1 | |
| 1148 | * If 0, Infinity, or NaN: 0 | |
| 1149 | * If positive number: limit = Math.floor(limit); if (limit > 4294967295) limit -= 4294967296; | |
| 1150 | * If negative number: 4294967296 - Math.floor(Math.abs(limit)) | |
| 1151 | * If other: Type-convert, then use the above rules | |
| 1152 | */ | |
| 1153 | limit = limit === void 0 ? | |
| 1154 | -1 >>> 0 : // Math.pow(2, 32) - 1 | |
| 1155 | limit >>> 0; // ToUint32(limit) | |
| 1156 | while (match = separator.exec(string)) { | |
| 1157 | // `separator.lastIndex` is not reliable cross-browser | |
| 1158 | lastIndex = match.index + match[0].length; | |
| 1159 | if (lastIndex > lastLastIndex) { | |
| 1160 | output.push(string.slice(lastLastIndex, match.index)); | |
| 1161 | // Fix browsers whose `exec` methods don't consistently return `undefined` for | |
| 1162 | // nonparticipating capturing groups | |
| 1163 | if (!compliantExecNpcg && match.length > 1) { | |
| 1164 | match[0].replace(separator2, function () { | |
| 1165 | for (var i = 1; i < arguments.length - 2; i++) { | |
| 1166 | if (arguments[i] === void 0) { | |
| 1167 | match[i] = void 0; | |
| 1168 | } | |
| 1169 | } | |
| 1170 | }); | |
| 1171 | } | |
| 1172 | if (match.length > 1 && match.index < string.length) { | |
| 1173 | Array.prototype.push.apply(output, match.slice(1)); | |
| 1174 | } | |
| 1175 | lastLength = match[0].length; | |
| 1176 | lastLastIndex = lastIndex; | |
| 1177 | if (output.length >= limit) { | |
| 1178 | break; | |
| 1179 | } | |
| 1180 | } | |
| 1181 | if (separator.lastIndex === match.index) { | |
| 1182 | separator.lastIndex++; // Avoid an infinite loop | |
| 1183 | } | |
| 1184 | } | |
| 1185 | if (lastLastIndex === string.length) { | |
| 1186 | if (lastLength || !separator.test("")) { | |
| 1187 | output.push(""); | |
| 1188 | } | |
| 1189 | } else { | |
| 1190 | output.push(string.slice(lastLastIndex)); | |
| 1191 | } | |
| 1192 | return output.length > limit ? output.slice(0, limit) : output; | |
| 1193 | }; | |
| 1194 | }()); | |
| 1195 | ||
| 1196 | // [bugfix, chrome] | |
| 1197 | // If separator is undefined, then the result array contains just one String, | |
| 1198 | // which is the this value (converted to a String). If limit is not undefined, | |
| 1199 | // then the output array is truncated so that it contains no more than limit | |
| 1200 | // elements. | |
| 1201 | // "0".split(undefined, 0) -> [] | |
| 1202 | } else if ("0".split(void 0, 0).length) { | |
| 1203 | String.prototype.split = function(separator, limit) { | |
| 1204 | if (separator === void 0 && limit === 0) return []; | |
| 1205 | return string_split.apply(this, arguments); | |
| 1206 | } | |
| 1207 | } | |
| 1208 | ||
| 1209 | ||
| 1210 | // ECMA-262, 3rd B.2.3 | |
| 1211 | // Note an ECMAScript standart, although ECMAScript 3rd Edition has a | |
| 1212 | // non-normative section suggesting uniform semantics and it should be | |
| 1213 | // normalized across all browsers | |
| 1214 | // [bugfix, IE lt 9] IE < 9 substr() with negative value not working in IE | |
| 1215 | if("".substr && "0b".substr(-1) !== "b") { | |
| 1216 | var string_substr = String.prototype.substr; | |
| 1217 | /** | |
| 1218 | * Get the substring of a string | |
| 1219 | * @param {integer} start where to start the substring | |
| 1220 | * @param {integer} length how many characters to return | |
| 1221 | * @return {string} | |
| 1222 | */ | |
| 1223 | String.prototype.substr = function(start, length) { | |
| 1224 | return string_substr.call( | |
| 1225 | this, | |
| 1226 | start < 0 ? ((start = this.length + start) < 0 ? 0 : start) : start, | |
| 1227 | length | |
| 1228 | ); | |
| 1229 | } | |
| 1230 | } | |
| 1231 | ||
| 1232 | // ES5 15.5.4.20 | |
| 1233 | // http://es5.github.com/#x15.5.4.20 | |
| 1234 | var ws = "\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003" + | |
| 1235 | "\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028" + | |
| 1236 | "\u2029\uFEFF"; | |
| 1237 | if (!String.prototype.trim || ws.trim()) { | |
| 1238 | // http://blog.stevenlevithan.com/archives/faster-trim-javascript | |
| 1239 | // http://perfectionkills.com/whitespace-deviations/ | |
| 1240 | ws = "[" + ws + "]"; | |
| 1241 | var trimBeginRegexp = new RegExp("^" + ws + ws + "*"), | |
| 1242 | trimEndRegexp = new RegExp(ws + ws + "*$"); | |
| 1243 | String.prototype.trim = function trim() { | |
| 1244 | if (this === void 0 || this === null) { | |
| 1245 | throw new TypeError("can't convert "+this+" to object"); | |
| 1246 | } | |
| 1247 | return String(this) | |
| 1248 | .replace(trimBeginRegexp, "") | |
| 1249 | .replace(trimEndRegexp, ""); | |
| 1250 | }; | |
| 1251 | } | |
| 1252 | ||
| 1253 | // | |
| 1254 | // Util | |
| 1255 | // ====== | |
| 1256 | // | |
| 1257 | ||
| 1258 | // ES5 9.4 | |
| 1259 | // http://es5.github.com/#x9.4 | |
| 1260 | // http://jsperf.com/to-integer | |
| 1261 | ||
| 1262 | function toInteger(n) { | |
| 1263 | n = +n; | |
| 1264 | if (n !== n) { // isNaN | |
| 1265 | n = 0; | |
| 1266 | } else if (n !== 0 && n !== (1/0) && n !== -(1/0)) { | |
| 1267 | n = (n > 0 || -1) * Math.floor(Math.abs(n)); | |
| 1268 | } | |
| 1269 | return n; | |
| 1270 | } | |
| 1271 | ||
| 1272 | function isPrimitive(input) { | |
| 1273 | var type = typeof input; | |
| 1274 | return ( | |
| 1275 | input === null || | |
| 1276 | type === "undefined" || | |
| 1277 | type === "boolean" || | |
| 1278 | type === "number" || | |
| 1279 | type === "string" | |
| 1280 | ); | |
| 1281 | } | |
| 1282 | ||
| 1283 | function toPrimitive(input) { | |
| 1284 | var val, valueOf, toString; | |
| 1285 | if (isPrimitive(input)) { | |
| 1286 | return input; | |
| 1287 | } | |
| 1288 | valueOf = input.valueOf; | |
| 1289 | if (typeof valueOf === "function") { | |
| 1290 | val = valueOf.call(input); | |
| 1291 | if (isPrimitive(val)) { | |
| 1292 | return val; | |
| 1293 | } | |
| 1294 | } | |
| 1295 | toString = input.toString; | |
| 1296 | if (typeof toString === "function") { | |
| 1297 | val = toString.call(input); | |
| 1298 | if (isPrimitive(val)) { | |
| 1299 | return val; | |
| 1300 | } | |
| 1301 | } | |
| 1302 | throw new TypeError(); | |
| 1303 | } | |
| 1304 | ||
| 1305 | // ES5 9.9 | |
| 1306 | // http://es5.github.com/#x9.9 | |
| 1307 | var toObject = function (o) { | |
| 1308 | if (o == null) { // this matches both null and undefined | |
| 1309 | throw new TypeError("can't convert "+o+" to object"); | |
| 1310 | } | |
| 1311 | return Object(o); | |
| 1312 | }; | |
| 1313 | ||
| 1314 | }); | |
