mochikit_v14/MochiKit/Base.js

   1 /***
   2
   3 MochiKit.Base 1.4
   4
   5 See <http://mochikit.com/> for documentation, downloads, license, etc.
   6
   7 (c) 2005 Bob Ippolito.  All rights Reserved.
   8
   9 ***/
  10
  11 if (typeof(dojo) != 'undefined') {
  12     dojo.provide("MochiKit.Base");
  13 }
  14 if (typeof(MochiKit) == 'undefined') {
  15     MochiKit = {};
  16 }
  17 if (typeof(MochiKit.Base) == 'undefined') {
  18     MochiKit.Base = {};
  19 }
  20 if (typeof(MochiKit.__export__) == "undefined") {
  21     MochiKit.__export__ = (MochiKit.__compat__  ||
  22         (typeof(JSAN) == 'undefined' && typeof(dojo) == 'undefined')
  23     );
  24 }
  25
  26 MochiKit.Base.VERSION = "1.4";
  27 MochiKit.Base.NAME = "MochiKit.Base";
  28 /** @id MochiKit.Base.update */
  29 MochiKit.Base.update = function (self, obj/*, ... */) {
  30     if (self === null) {
  31         self = {};
  32     }
  33     for (var i = 1; i < arguments.length; i++) {
  34         var o = arguments[i];
  35         if (typeof(o) != 'undefined' && o !== null) {
  36             for (var k in o) {
  37                 self[k] = o[k];
  38             }
  39         }
  40     }
  41     return self;
  42 };
  43
  44 MochiKit.Base.update(MochiKit.Base, {
  45     __repr__: function () {
  46         return "[" + this.NAME + " " + this.VERSION + "]";
  47     },
  48
  49     toString: function () {
  50         return this.__repr__();
  51     },
  52
  53     /** @id MochiKit.Base.camelize */
  54     camelize: function (selector) {
  55         /* from dojo.style.toCamelCase */
  56         var arr = selector.split('-');
  57         var cc = arr[0];
  58         for (var i = 1; i < arr.length; i++) {
  59             cc += arr[i].charAt(0).toUpperCase() + arr[i].substring(1);
  60         }
  61         return cc;
  62     },
  63
  64     /** @id MochiKit.Base.counter */
  65     counter: function (n/* = 1 */) {
  66         if (arguments.length === 0) {
  67             n = 1;
  68         }
  69         return function () {
  70             return n++;
  71         };
  72     },
  73
  74     /** @id MochiKit.Base.clone */
  75     clone: function (obj) {
  76         var me = arguments.callee;
  77         if (arguments.length == 1) {
  78             me.prototype = obj;
  79             return new me();
  80         }
  81     },
  82
  83     _flattenArray: function (res, lst) {
  84         for (var i = 0; i < lst.length; i++) {
  85             var o = lst[i];
  86             if (o instanceof Array) {
  87                 arguments.callee(res, o);
  88             } else {
  89                 res.push(o);
  90             }
  91         }
  92         return res;
  93     },
  94
  95     /** @id MochiKit.Base.flattenArray */
  96     flattenArray: function (lst) {
  97         return MochiKit.Base._flattenArray([], lst);
  98     },
  99
 100     /** @id MochiKit.Base.flattenArguments */
 101     flattenArguments: function (lst/* ...*/) {
 102         var res = [];
 103         var m = MochiKit.Base;
 104         var args = m.extend(null, arguments);
 105         while (args.length) {
 106             var o = args.shift();
 107             if (o && typeof(o) == "object" && typeof(o.length) == "number") {
 108                 for (var i = o.length - 1; i >= 0; i--) {
 109                     args.unshift(o[i]);
 110                 }
 111             } else {
 112                 res.push(o);
 113             }
 114         }
 115         return res;
 116     },
 117
 118     /** @id MochiKit.Base.extend */
 119     extend: function (self, obj, /* optional */skip) {
 120         // Extend an array with an array-like object starting
 121         // from the skip index
 122         if (!skip) {
 123             skip = 0;
 124         }
 125         if (obj) {
 126             // allow iterable fall-through, but skip the full isArrayLike
 127             // check for speed, this is called often.
 128             var l = obj.length;
 129             if (typeof(l) != 'number' /* !isArrayLike(obj) */) {
 130                 if (typeof(MochiKit.Iter) != "undefined") {
 131                     obj = MochiKit.Iter.list(obj);
 132                     l = obj.length;
 133                 } else {
 134                     throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
 135                 }
 136             }
 137             if (!self) {
 138                 self = [];
 139             }
 140             for (var i = skip; i < l; i++) {
 141                 self.push(obj[i]);
 142             }
 143         }
 144         // This mutates, but it's convenient to return because
 145         // it's often used like a constructor when turning some
 146         // ghetto array-like to a real array
 147         return self;
 148     },
 149
 150
 151     /** @id MochiKit.Base.updatetree */
 152     updatetree: function (self, obj/*, ...*/) {
 153         if (self === null) {
 154             self = {};
 155         }
 156         for (var i = 1; i < arguments.length; i++) {
 157             var o = arguments[i];
 158             if (typeof(o) != 'undefined' && o !== null) {
 159                 for (var k in o) {
 160                     var v = o[k];
 161                     if (typeof(self[k]) == 'object' && typeof(v) == 'object') {
 162                         arguments.callee(self[k], v);
 163                     } else {
 164                         self[k] = v;
 165                     }
 166                 }
 167             }
 168         }
 169         return self;
 170     },
 171
 172     /** @id MochiKit.Base.setdefault */
 173     setdefault: function (self, obj/*, ...*/) {
 174         if (self === null) {
 175             self = {};
 176         }
 177         for (var i = 1; i < arguments.length; i++) {
 178             var o = arguments[i];
 179             for (var k in o) {
 180                 if (!(k in self)) {
 181                     self[k] = o[k];
 182                 }
 183             }
 184         }
 185         return self;
 186     },
 187
 188     /** @id MochiKit.Base.keys */
 189     keys: function (obj) {
 190         var rval = [];
 191         for (var prop in obj) {
 192             rval.push(prop);
 193         }
 194         return rval;
 195     },
 196
 197     /** @id MochiKit.Base.values */
 198     values: function (obj) {
 199         var rval = [];
 200         for (var prop in obj) {
 201             rval.push(obj[prop]);
 202         }
 203         return rval;
 204     },
 205
 206      /** @id MochiKit.Base.items */
 207     items: function (obj) {
 208         var rval = [];
 209         var e;
 210         for (var prop in obj) {
 211             var v;
 212             try {
 213                 v = obj[prop];
 214             } catch (e) {
 215                 continue;
 216             }
 217             rval.push([prop, v]);
 218         }
 219         return rval;
 220     },
 221
 222
 223     _newNamedError: function (module, name, func) {
 224         func.prototype = new MochiKit.Base.NamedError(module.NAME + "." + name);
 225         module[name] = func;
 226     },
 227
 228
 229     /** @id MochiKit.Base.operator */
 230     operator: {
 231         // unary logic operators
 232         /** @id MochiKit.Base.truth */
 233         truth: function (a) { return !!a; },
 234         /** @id MochiKit.Base.lognot */
 235         lognot: function (a) { return !a; },
 236         /** @id MochiKit.Base.identity */
 237         identity: function (a) { return a; },
 238
 239         // bitwise unary operators
 240         /** @id MochiKit.Base.not */
 241         not: function (a) { return ~a; },
 242         /** @id MochiKit.Base.neg */
 243         neg: function (a) { return -a; },
 244
 245         // binary operators
 246         /** @id MochiKit.Base.add */
 247         add: function (a, b) { return a + b; },
 248         /** @id MochiKit.Base.sub */
 249         sub: function (a, b) { return a - b; },
 250         /** @id MochiKit.Base.div */
 251         div: function (a, b) { return a / b; },
 252         /** @id MochiKit.Base.mod */
 253         mod: function (a, b) { return a % b; },
 254         /** @id MochiKit.Base.mul */
 255         mul: function (a, b) { return a * b; },
 256
 257         // bitwise binary operators
 258         /** @id MochiKit.Base.and */
 259         and: function (a, b) { return a & b; },
 260         /** @id MochiKit.Base.or */
 261         or: function (a, b) { return a | b; },
 262         /** @id MochiKit.Base.xor */
 263         xor: function (a, b) { return a ^ b; },
 264         /** @id MochiKit.Base.lshift */
 265         lshift: function (a, b) { return a << b; },
 266         /** @id MochiKit.Base.rshift */
 267         rshift: function (a, b) { return a >> b; },
 268         /** @id MochiKit.Base.zrshift */
 269         zrshift: function (a, b) { return a >>> b; },
 270
 271         // near-worthless built-in comparators
 272         /** @id MochiKit.Base.eq */
 273         eq: function (a, b) { return a == b; },
 274         /** @id MochiKit.Base.ne */
 275         ne: function (a, b) { return a != b; },
 276         /** @id MochiKit.Base.gt */
 277         gt: function (a, b) { return a > b; },
 278         /** @id MochiKit.Base.ge */
 279         ge: function (a, b) { return a >= b; },
 280         /** @id MochiKit.Base.lt */
 281         lt: function (a, b) { return a < b; },
 282         /** @id MochiKit.Base.le */
 283         le: function (a, b) { return a <= b; },
 284
 285         // strict built-in comparators
 286         seq: function (a, b) { return a === b; },
 287         sne: function (a, b) { return a !== b; },
 288
 289         // compare comparators
 290         /** @id MochiKit.Base.ceq */
 291         ceq: function (a, b) { return MochiKit.Base.compare(a, b) === 0; },
 292         /** @id MochiKit.Base.cne */
 293         cne: function (a, b) { return MochiKit.Base.compare(a, b) !== 0; },
 294         /** @id MochiKit.Base.cgt */
 295         cgt: function (a, b) { return MochiKit.Base.compare(a, b) == 1; },
 296         /** @id MochiKit.Base.cge */
 297         cge: function (a, b) { return MochiKit.Base.compare(a, b) != -1; },
 298         /** @id MochiKit.Base.clt */
 299         clt: function (a, b) { return MochiKit.Base.compare(a, b) == -1; },
 300         /** @id MochiKit.Base.cle */
 301         cle: function (a, b) { return MochiKit.Base.compare(a, b) != 1; },
 302
 303         // binary logical operators
 304         /** @id MochiKit.Base.logand */
 305         logand: function (a, b) { return a && b; },
 306         /** @id MochiKit.Base.logor */
 307         logor: function (a, b) { return a || b; },
 308         /** @id MochiKit.Base.contains */
 309         contains: function (a, b) { return b in a; }
 310     },
 311
 312     /** @id MochiKit.Base.forwardCall */
 313     forwardCall: function (func) {
 314         return function () {
 315             return this[func].apply(this, arguments);
 316         };
 317     },
 318
 319     /** @id MochiKit.Base.itemgetter */
 320     itemgetter: function (func) {
 321         return function (arg) {
 322             return arg[func];
 323         };
 324     },
 325
 326     /** @id MochiKit.Base.typeMatcher */
 327     typeMatcher: function (/* typ */) {
 328         var types = {};
 329         for (var i = 0; i < arguments.length; i++) {
 330             var typ = arguments[i];
 331             types[typ] = typ;
 332         }
 333         return function () {
 334             for (var i = 0; i < arguments.length; i++) {
 335                 if (!(typeof(arguments[i]) in types)) {
 336                     return false;
 337                 }
 338             }
 339             return true;
 340         };
 341     },
 342
 343     /** @id MochiKit.Base.isNull */
 344     isNull: function (/* ... */) {
 345         for (var i = 0; i < arguments.length; i++) {
 346             if (arguments[i] !== null) {
 347                 return false;
 348             }
 349         }
 350         return true;
 351     },
 352
 353     /** @id MochiKit.Base.isUndefinedOrNull */
 354     isUndefinedOrNull: function (/* ... */) {
 355         for (var i = 0; i < arguments.length; i++) {
 356             var o = arguments[i];
 357             if (!(typeof(o) == 'undefined' || o === null)) {
 358                 return false;
 359             }
 360         }
 361         return true;
 362     },
 363
 364     /** @id MochiKit.Base.isEmpty */
 365     isEmpty: function (obj) {
 366         return !MochiKit.Base.isNotEmpty.apply(this, arguments);
 367     },
 368
 369     /** @id MochiKit.Base.isNotEmpty */
 370     isNotEmpty: function (obj) {
 371         for (var i = 0; i < arguments.length; i++) {
 372             var o = arguments[i];
 373             if (!(o && o.length)) {
 374                 return false;
 375             }
 376         }
 377         return true;
 378     },
 379
 380     /** @id MochiKit.Base.isArrayLike */
 381     isArrayLike: function () {
 382         for (var i = 0; i < arguments.length; i++) {
 383             var o = arguments[i];
 384             var typ = typeof(o);
 385             if (
 386                 (typ != 'object' && !(typ == 'function' && typeof(o.item) == 'function')) ||
 387                 o === null ||
 388                 typeof(o.length) != 'number' ||
 389                 o.nodeType === 3
 390             ) {
 391                 return false;
 392             }
 393         }
 394         return true;
 395     },
 396
 397     /** @id MochiKit.Base.isDateLike */
 398     isDateLike: function () {
 399         for (var i = 0; i < arguments.length; i++) {
 400             var o = arguments[i];
 401             if (typeof(o) != "object" || o === null
 402                     || typeof(o.getTime) != 'function') {
 403                 return false;
 404             }
 405         }
 406         return true;
 407     },
 408
 409
 410     /** @id MochiKit.Base.xmap */
 411     xmap: function (fn/*, obj... */) {
 412         if (fn === null) {
 413             return MochiKit.Base.extend(null, arguments, 1);
 414         }
 415         var rval = [];
 416         for (var i = 1; i < arguments.length; i++) {
 417             rval.push(fn(arguments[i]));
 418         }
 419         return rval;
 420     },
 421
 422     /** @id MochiKit.Base.map */
 423     map: function (fn, lst/*, lst... */) {
 424         var m = MochiKit.Base;
 425         var itr = MochiKit.Iter;
 426         var isArrayLike = m.isArrayLike;
 427         if (arguments.length <= 2) {
 428             // allow an iterable to be passed
 429             if (!isArrayLike(lst)) {
 430                 if (itr) {
 431                     // fast path for map(null, iterable)
 432                     lst = itr.list(lst);
 433                     if (fn === null) {
 434                         return lst;
 435                     }
 436                 } else {
 437                     throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
 438                 }
 439             }
 440             // fast path for map(null, lst)
 441             if (fn === null) {
 442                 return m.extend(null, lst);
 443             }
 444             // disabled fast path for map(fn, lst)
 445             /*
 446             if (false && typeof(Array.prototype.map) == 'function') {
 447                 // Mozilla fast-path
 448                 return Array.prototype.map.call(lst, fn);
 449             }
 450             */
 451             var rval = [];
 452             for (var i = 0; i < lst.length; i++) {
 453                 rval.push(fn(lst[i]));
 454             }
 455             return rval;
 456         } else {
 457             // default for map(null, ...) is zip(...)
 458             if (fn === null) {
 459                 fn = Array;
 460             }
 461             var length = null;
 462             for (i = 1; i < arguments.length; i++) {
 463                 // allow iterables to be passed
 464                 if (!isArrayLike(arguments[i])) {
 465                     if (itr) {
 466                         return itr.list(itr.imap.apply(null, arguments));
 467                     } else {
 468                         throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
 469                     }
 470                 }
 471                 // find the minimum length
 472                 var l = arguments[i].length;
 473                 if (length === null || length > l) {
 474                     length = l;
 475                 }
 476             }
 477             rval = [];
 478             for (i = 0; i < length; i++) {
 479                 var args = [];
 480                 for (var j = 1; j < arguments.length; j++) {
 481                     args.push(arguments[j][i]);
 482                 }
 483                 rval.push(fn.apply(this, args));
 484             }
 485             return rval;
 486         }
 487     },
 488
 489     /** @id MochiKit.Base.xfilter */
 490     xfilter: function (fn/*, obj... */) {
 491         var rval = [];
 492         if (fn === null) {
 493             fn = MochiKit.Base.operator.truth;
 494         }
 495         for (var i = 1; i < arguments.length; i++) {
 496             var o = arguments[i];
 497             if (fn(o)) {
 498                 rval.push(o);
 499             }
 500         }
 501         return rval;
 502     },
 503
 504     /** @id MochiKit.Base.filter */
 505     filter: function (fn, lst, self) {
 506         var rval = [];
 507         // allow an iterable to be passed
 508         var m = MochiKit.Base;
 509         if (!m.isArrayLike(lst)) {
 510             if (MochiKit.Iter) {
 511                 lst = MochiKit.Iter.list(lst);
 512             } else {
 513                 throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
 514             }
 515         }
 516         if (fn === null) {
 517             fn = m.operator.truth;
 518         }
 519         if (typeof(Array.prototype.filter) == 'function') {
 520             // Mozilla fast-path
 521             return Array.prototype.filter.call(lst, fn, self);
 522         } else if (typeof(self) == 'undefined' || self === null) {
 523             for (var i = 0; i < lst.length; i++) {
 524                 var o = lst[i];
 525                 if (fn(o)) {
 526                     rval.push(o);
 527                 }
 528             }
 529         } else {
 530             for (i = 0; i < lst.length; i++) {
 531                 o = lst[i];
 532                 if (fn.call(self, o)) {
 533                     rval.push(o);
 534                 }
 535             }
 536         }
 537         return rval;
 538     },
 539
 540
 541     _wrapDumbFunction: function (func) {
 542         return function () {
 543             // fast path!
 544             switch (arguments.length) {
 545                 case 0: return func();
 546                 case 1: return func(arguments[0]);
 547                 case 2: return func(arguments[0], arguments[1]);
 548                 case 3: return func(arguments[0], arguments[1], arguments[2]);
 549             }
 550             var args = [];
 551             for (var i = 0; i < arguments.length; i++) {
 552                 args.push("arguments[" + i + "]");
 553             }
 554             return eval("(func(" + args.join(",") + "))");
 555         };
 556     },
 557
 558     /** @id MochiKit.Base.methodcaller */
 559     methodcaller: function (func/*, args... */) {
 560         var args = MochiKit.Base.extend(null, arguments, 1);
 561         if (typeof(func) == "function") {
 562             return function (obj) {
 563                 return func.apply(obj, args);
 564             };
 565         } else {
 566             return function (obj) {
 567                 return obj[func].apply(obj, args);
 568             };
 569         }
 570     },
 571
 572     /** @id MochiKit.Base.method */
 573     method: function (self, func) {
 574         var m = MochiKit.Base;
 575         return m.bind.apply(this, m.extend([func, self], arguments, 2));
 576     },
 577
 578     /** @id MochiKit.Base.compose */
 579     compose: function (f1, f2/*, f3, ... fN */) {
 580         var fnlist = [];
 581         var m = MochiKit.Base;
 582         if (arguments.length === 0) {
 583             throw new TypeError("compose() requires at least one argument");
 584         }
 585         for (var i = 0; i < arguments.length; i++) {
 586             var fn = arguments[i];
 587             if (typeof(fn) != "function") {
 588                 throw new TypeError(m.repr(fn) + " is not a function");
 589             }
 590             fnlist.push(fn);
 591         }
 592         return function () {
 593             var args = arguments;
 594             for (var i = fnlist.length - 1; i >= 0; i--) {
 595                 args = [fnlist[i].apply(this, args)];
 596             }
 597             return args[0];
 598         };
 599     },
 600
 601     /** @id MochiKit.Base.bind */
 602     bind: function (func, self/* args... */) {
 603         if (typeof(func) == "string") {
 604             func = self[func];
 605         }
 606         var im_func = func.im_func;
 607         var im_preargs = func.im_preargs;
 608         var im_self = func.im_self;
 609         var m = MochiKit.Base;
 610         if (typeof(func) == "function" && typeof(func.apply) == "undefined") {
 611             // this is for cases where JavaScript sucks ass and gives you a
 612             // really dumb built-in function like alert() that doesn't have
 613             // an apply
 614             func = m._wrapDumbFunction(func);
 615         }
 616         if (typeof(im_func) != 'function') {
 617             im_func = func;
 618         }
 619         if (typeof(self) != 'undefined') {
 620             im_self = self;
 621         }
 622         if (typeof(im_preargs) == 'undefined') {
 623             im_preargs = [];
 624         } else  {
 625             im_preargs = im_preargs.slice();
 626         }
 627         m.extend(im_preargs, arguments, 2);
 628         var newfunc = function () {
 629             var args = arguments;
 630             var me = arguments.callee;
 631             if (me.im_preargs.length > 0) {
 632                 args = m.concat(me.im_preargs, args);
 633             }
 634             var self = me.im_self;
 635             if (!self) {
 636                 self = this;
 637             }
 638             return me.im_func.apply(self, args);
 639         };
 640         newfunc.im_self = im_self;
 641         newfunc.im_func = im_func;
 642         newfunc.im_preargs = im_preargs;
 643         return newfunc;
 644     },
 645
 646     /** @id MochiKit.Base.bindMethods */
 647     bindMethods: function (self) {
 648         var bind = MochiKit.Base.bind;
 649         for (var k in self) {
 650             var func = self[k];
 651             if (typeof(func) == 'function') {
 652                 self[k] = bind(func, self);
 653             }
 654         }
 655     },
 656
 657     /** @id MochiKit.Base.registerComparator */
 658     registerComparator: function (name, check, comparator, /* optional */ override) {
 659         MochiKit.Base.comparatorRegistry.register(name, check, comparator, override);
 660     },
 661
 662     _primitives: {'boolean': true, 'string': true, 'number': true},
 663
 664     /** @id MochiKit.Base.compare */
 665     compare: function (a, b) {
 666         if (a == b) {
 667             return 0;
 668         }
 669         var aIsNull = (typeof(a) == 'undefined' || a === null);
 670         var bIsNull = (typeof(b) == 'undefined' || b === null);
 671         if (aIsNull && bIsNull) {
 672             return 0;
 673         } else if (aIsNull) {
 674             return -1;
 675         } else if (bIsNull) {
 676             return 1;
 677         }
 678         var m = MochiKit.Base;
 679         // bool, number, string have meaningful comparisons
 680         var prim = m._primitives;
 681         if (!(typeof(a) in prim && typeof(b) in prim)) {
 682             try {
 683                 return m.comparatorRegistry.match(a, b);
 684             } catch (e) {
 685                 if (e != m.NotFound) {
 686                     throw e;
 687                 }
 688             }
 689         }
 690         if (a < b) {
 691             return -1;
 692         } else if (a > b) {
 693             return 1;
 694         }
 695         // These types can't be compared
 696         var repr = m.repr;
 697         throw new TypeError(repr(a) + " and " + repr(b) + " can not be compared");
 698     },
 699
 700     /** @id MochiKit.Base.compareDateLike */
 701     compareDateLike: function (a, b) {
 702         return MochiKit.Base.compare(a.getTime(), b.getTime());
 703     },
 704
 705     /** @id MochiKit.Base.compareArrayLike */
 706     compareArrayLike: function (a, b) {
 707         var compare = MochiKit.Base.compare;
 708         var count = a.length;
 709         var rval = 0;
 710         if (count > b.length) {
 711             rval = 1;
 712             count = b.length;
 713         } else if (count < b.length) {
 714             rval = -1;
 715         }
 716         for (var i = 0; i < count; i++) {
 717             var cmp = compare(a[i], b[i]);
 718             if (cmp) {
 719                 return cmp;
 720             }
 721         }
 722         return rval;
 723     },
 724
 725     /** @id MochiKit.Base.registerRepr */
 726     registerRepr: function (name, check, wrap, /* optional */override) {
 727         MochiKit.Base.reprRegistry.register(name, check, wrap, override);
 728     },
 729
 730     /** @id MochiKit.Base.repr */
 731     repr: function (o) {
 732         if (typeof(o) == "undefined") {
 733             return "undefined";
 734         } else if (o === null) {
 735             return "null";
 736         }
 737         try {
 738             if (typeof(o.__repr__) == 'function') {
 739                 return o.__repr__();
 740             } else if (typeof(o.repr) == 'function' && o.repr != arguments.callee) {
 741                 return o.repr();
 742             }
 743             return MochiKit.Base.reprRegistry.match(o);
 744         } catch (e) {
 745             if (typeof(o.NAME) == 'string' && (
 746                     o.toString == Function.prototype.toString ||
 747                     o.toString == Object.prototype.toString
 748                 )) {
 749                 return o.NAME;
 750             }
 751         }
 752         try {
 753             var ostring = (o + "");
 754         } catch (e) {
 755             return "[" + typeof(o) + "]";
 756         }
 757         if (typeof(o) == "function") {
 758             o = ostring.replace(/^\s+/, "");
 759             var idx = o.indexOf("{");
 760             if (idx != -1) {
 761                 o = o.substr(0, idx) + "{...}";
 762             }
 763         }
 764         return ostring;
 765     },
 766
 767     /** @id MochiKit.Base.reprArrayLike */
 768     reprArrayLike: function (o) {
 769         var m = MochiKit.Base;
 770         return "[" + m.map(m.repr, o).join(", ") + "]";
 771     },
 772
 773     /** @id MochiKit.Base.reprString */
 774     reprString: function (o) {
 775         return ('"' + o.replace(/(["\\])/g, '\\$1') + '"'
 776             ).replace(/[\f]/g, "\\f"
 777             ).replace(/[\b]/g, "\\b"
 778             ).replace(/[\n]/g, "\\n"
 779             ).replace(/[\t]/g, "\\t"
 780             ).replace(/[\r]/g, "\\r");
 781     },
 782
 783     /** @id MochiKit.Base.reprNumber */
 784     reprNumber: function (o) {
 785         return o + "";
 786     },
 787
 788     /** @id MochiKit.Base.registerJSON */
 789     registerJSON: function (name, check, wrap, /* optional */override) {
 790         MochiKit.Base.jsonRegistry.register(name, check, wrap, override);
 791     },
 792
 793
 794     /** @id MochiKit.Base.evalJSON */
 795     evalJSON: function () {
 796         return eval("(" + arguments[0] + ")");
 797     },
 798
 799     /** @id MochiKit.Base.serializeJSON */
 800     serializeJSON: function (o) {
 801         var objtype = typeof(o);
 802         if (objtype == "number" || objtype == "boolean") {
 803             return o + "";
 804         } else if (o === null) {
 805             return "null";
 806         }
 807         var m = MochiKit.Base;
 808         var reprString = m.reprString;
 809         if (objtype == "string") {
 810             return reprString(o);
 811         }
 812         // recurse
 813         var me = arguments.callee;
 814         // short-circuit for objects that support "json" serialization
 815         // if they return "self" then just pass-through...
 816         var newObj;
 817         if (typeof(o.__json__) == "function") {
 818             newObj = o.__json__();
 819             if (o !== newObj) {
 820                 return me(newObj);
 821             }
 822         }
 823         if (typeof(o.json) == "function") {
 824             newObj = o.json();
 825             if (o !== newObj) {
 826                 return me(newObj);
 827             }
 828         }
 829         // array
 830         if (objtype != "function" && typeof(o.length) == "number") {
 831             var res = [];
 832             for (var i = 0; i < o.length; i++) {
 833                 var val = me(o[i]);
 834                 if (typeof(val) != "string") {
 835                     val = "undefined";
 836                 }
 837                 res.push(val);
 838             }
 839             return "[" + res.join(", ") + "]";
 840         }
 841         // look in the registry
 842         try {
 843             newObj = m.jsonRegistry.match(o);
 844             if (o !== newObj) {
 845                 return me(newObj);
 846             }
 847         } catch (e) {
 848             if (e != m.NotFound) {
 849                 // something really bad happened
 850                 throw e;
 851             }
 852         }
 853         // undefined is outside of the spec
 854         if (objtype == "undefined") {
 855             throw new TypeError("undefined can not be serialized as JSON");
 856         }
 857         // it's a function with no adapter, bad
 858         if (objtype == "function") {
 859             return null;
 860         }
 861         // generic object code path
 862         res = [];
 863         for (var k in o) {
 864             var useKey;
 865             if (typeof(k) == "number") {
 866                 useKey = '"' + k + '"';
 867             } else if (typeof(k) == "string") {
 868                 useKey = reprString(k);
 869             } else {
 870                 // skip non-string or number keys
 871                 continue;
 872             }
 873             val = me(o[k]);
 874             if (typeof(val) != "string") {
 875                 // skip non-serializable values
 876                 continue;
 877             }
 878             res.push(useKey + ":" + val);
 879         }
 880         return "{" + res.join(", ") + "}";
 881     },
 882
 883
 884     /** @id MochiKit.Base.objEqual */
 885     objEqual: function (a, b) {
 886         return (MochiKit.Base.compare(a, b) === 0);
 887     },
 888
 889     /** @id MochiKit.Base.arrayEqual */
 890     arrayEqual: function (self, arr) {
 891         if (self.length != arr.length) {
 892             return false;
 893         }
 894         return (MochiKit.Base.compare(self, arr) === 0);
 895     },
 896
 897     /** @id MochiKit.Base.concat */
 898     concat: function (/* lst... */) {
 899         var rval = [];
 900         var extend = MochiKit.Base.extend;
 901         for (var i = 0; i < arguments.length; i++) {
 902             extend(rval, arguments[i]);
 903         }
 904         return rval;
 905     },
 906
 907     /** @id MochiKit.Base.keyComparator */
 908     keyComparator: function (key/* ... */) {
 909         // fast-path for single key comparisons
 910         var m = MochiKit.Base;
 911         var compare = m.compare;
 912         if (arguments.length == 1) {
 913             return function (a, b) {
 914                 return compare(a[key], b[key]);
 915             };
 916         }
 917         var compareKeys = m.extend(null, arguments);
 918         return function (a, b) {
 919             var rval = 0;
 920             // keep comparing until something is inequal or we run out of
 921             // keys to compare
 922             for (var i = 0; (rval === 0) && (i < compareKeys.length); i++) {
 923                 var key = compareKeys[i];
 924                 rval = compare(a[key], b[key]);
 925             }
 926             return rval;
 927         };
 928     },
 929
 930     /** @id MochiKit.Base.reverseKeyComparator */
 931     reverseKeyComparator: function (key) {
 932         var comparator = MochiKit.Base.keyComparator.apply(this, arguments);
 933         return function (a, b) {
 934             return comparator(b, a);
 935         };
 936     },
 937
 938     /** @id MochiKit.Base.partial */
 939     partial: function (func) {
 940         var m = MochiKit.Base;
 941         return m.bind.apply(this, m.extend([func, undefined], arguments, 1));
 942     },
 943
 944     /** @id MochiKit.Base.listMinMax */
 945     listMinMax: function (which, lst) {
 946         if (lst.length === 0) {
 947             return null;
 948         }
 949         var cur = lst[0];
 950         var compare = MochiKit.Base.compare;
 951         for (var i = 1; i < lst.length; i++) {
 952             var o = lst[i];
 953             if (compare(o, cur) == which) {
 954                 cur = o;
 955             }
 956         }
 957         return cur;
 958     },
 959
 960     /** @id MochiKit.Base.objMax */
 961     objMax: function (/* obj... */) {
 962         return MochiKit.Base.listMinMax(1, arguments);
 963     },
 964
 965     /** @id MochiKit.Base.objMin */
 966     objMin: function (/* obj... */) {
 967         return MochiKit.Base.listMinMax(-1, arguments);
 968     },
 969
 970     /** @id MochiKit.Base.findIdentical */
 971     findIdentical: function (lst, value, start/* = 0 */, /* optional */end) {
 972         if (typeof(end) == "undefined" || end === null) {
 973             end = lst.length;
 974         }
 975         if (typeof(start) == "undefined" || start === null) {
 976             start = 0;
 977         }
 978         for (var i = start; i < end; i++) {
 979             if (lst[i] === value) {
 980                 return i;
 981             }
 982         }
 983         return -1;
 984     },
 985
 986     /** @id MochiKit.Base.mean */
 987     mean: function(/* lst... */) {
 988         /* http://www.nist.gov/dads/HTML/mean.html */
 989         var sum = 0;
 990
 991         var m = MochiKit.Base;
 992         var args = m.extend(null, arguments);
 993         var count = args.length;
 994
 995         while (args.length) {
 996             var o = args.shift();
 997             if (o && typeof(o) == "object" && typeof(o.length) == "number") {
 998                 count += o.length - 1;
 999                 for (var i = o.length - 1; i >= 0; i--) {
1000                     sum += o[i];
1001                 }
1002             } else {
1003                 sum += o;
1004             }
1005         }
1006
1007         if (count <= 0) {
1008             throw new TypeError('mean() requires at least one argument');
1009         }
1010
1011         return sum/count;
1012     },
1013
1014     /** @id MochiKit.Base.median */
1015     median: function(/* lst... */) {
1016         /* http://www.nist.gov/dads/HTML/median.html */
1017         var data = MochiKit.Base.flattenArguments(arguments);
1018         if (data.length === 0) {
1019             throw new TypeError('median() requires at least one argument');
1020         }
1021         data.sort(compare);
1022         if (data.length % 2 == 0) {
1023             var upper = data.length / 2;
1024             return (data[upper] + data[upper - 1]) / 2;
1025         } else {
1026             return data[(data.length - 1) / 2];
1027         }
1028     },
1029
1030     /** @id MochiKit.Base.findValue */
1031     findValue: function (lst, value, start/* = 0 */, /* optional */end) {
1032         if (typeof(end) == "undefined" || end === null) {
1033             end = lst.length;
1034         }
1035         if (typeof(start) == "undefined" || start === null) {
1036             start = 0;
1037         }
1038         var cmp = MochiKit.Base.compare;
1039         for (var i = start; i < end; i++) {
1040             if (cmp(lst[i], value) === 0) {
1041                 return i;
1042             }
1043         }
1044         return -1;
1045     },
1046
1047     /** @id MochiKit.Base.nodeWalk */
1048     nodeWalk: function (node, visitor) {
1049         var nodes = [node];
1050         var extend = MochiKit.Base.extend;
1051         while (nodes.length) {
1052             var res = visitor(nodes.shift());
1053             if (res) {
1054                 extend(nodes, res);
1055             }
1056         }
1057     },
1058
1059
1060     /** @id MochiKit.Base.nameFunctions */
1061     nameFunctions: function (namespace) {
1062         var base = namespace.NAME;
1063         if (typeof(base) == 'undefined') {
1064             base = '';
1065         } else {
1066             base = base + '.';
1067         }
1068         for (var name in namespace) {
1069             var o = namespace[name];
1070             if (typeof(o) == 'function' && typeof(o.NAME) == 'undefined') {
1071                 try {
1072                     o.NAME = base + name;
1073                 } catch (e) {
1074                     // pass
1075                 }
1076             }
1077         }
1078     },
1079
1080
1081     /** @id MochiKit.Base.queryString */
1082     queryString: function (names, values) {
1083         // check to see if names is a string or a DOM element, and if
1084         // MochiKit.DOM is available.  If so, drop it like it's a form
1085         // Ugliest conditional in MochiKit?  Probably!
1086         if (typeof(MochiKit.DOM) != "undefined" && arguments.length == 1
1087             && (typeof(names) == "string" || (
1088                 typeof(names.nodeType) != "undefined" && names.nodeType > 0
1089             ))
1090         ) {
1091             var kv = MochiKit.DOM.formContents(names);
1092             names = kv[0];
1093             values = kv[1];
1094         } else if (arguments.length == 1) {
1095             // Allow the return value of formContents to be passed directly
1096             if (typeof(names.length) == "number" && names.length == 2) {
1097                 return arguments.callee(names[0], names[1]);
1098             }
1099             var o = names;
1100             names = [];
1101             values = [];
1102             for (var k in o) {
1103                 var v = o[k];
1104                 if (typeof(v) == "function") {
1105                     continue;
1106                 } else if (typeof(v) != "string" &&
1107                         typeof(v.length) == "number") {
1108                     for (var i = 0; i < v.length; i++) {
1109                         names.push(k);
1110                         values.push(v[i]);
1111                     }
1112                 } else {
1113                     names.push(k);
1114                     values.push(v);
1115                 }
1116             }
1117         }
1118         var rval = [];
1119         var len = Math.min(names.length, values.length);
1120         var urlEncode = MochiKit.Base.urlEncode;
1121         for (var i = 0; i < len; i++) {
1122             v = values[i];
1123             if (typeof(v) != 'undefined' && v !== null) {
1124                 rval.push(urlEncode(names[i]) + "=" + urlEncode(v));
1125             }
1126         }
1127         return rval.join("&");
1128     },
1129
1130
1131     /** @id MochiKit.Base.parseQueryString */
1132     parseQueryString: function (encodedString, useArrays) {
1133         // strip a leading '?' from the encoded string
1134         var qstr = (encodedString.charAt(0) == "?")
1135             ? encodedString.substring(1)
1136             : encodedString;
1137         var pairs = qstr.replace(/\+/g, "%20").split(/(\&amp\;|\&\#38\;|\&#x26;|\&)/);
1138         var o = {};
1139         var decode;
1140         if (typeof(decodeURIComponent) != "undefined") {
1141             decode = decodeURIComponent;
1142         } else {
1143             decode = unescape;
1144         }
1145         if (useArrays) {
1146             for (var i = 0; i < pairs.length; i++) {
1147                 var pair = pairs[i].split("=");
1148                 var name = decode(pair.shift());
1149                 if (!name) {
1150                     continue;
1151                 }
1152                 var arr = o[name];
1153                 if (!(arr instanceof Array)) {
1154                     arr = [];
1155                     o[name] = arr;
1156                 }
1157                 arr.push(decode(pair.join("=")));
1158             }
1159         } else {
1160             for (i = 0; i < pairs.length; i++) {
1161                 pair = pairs[i].split("=");
1162                 var name = pair.shift();
1163                 if (!name) {
1164                     continue;
1165                 }
1166                 o[decode(name)] = decode(pair.join("="));
1167             }
1168         }
1169         return o;
1170     }
1171 });
1172
1173 /** @id MochiKit.Base.AdapterRegistry */
1174 MochiKit.Base.AdapterRegistry = function () {
1175     this.pairs = [];
1176 };
1177
1178 MochiKit.Base.AdapterRegistry.prototype = {
1179     /** @id MochiKit.Base.AdapterRegistry.prototype.register */
1180     register: function (name, check, wrap, /* optional */ override) {
1181         if (override) {
1182             this.pairs.unshift([name, check, wrap]);
1183         } else {
1184             this.pairs.push([name, check, wrap]);
1185         }
1186     },
1187
1188     /** @id MochiKit.Base.AdapterRegistry.prototype.match */
1189     match: function (/* ... */) {
1190         for (var i = 0; i < this.pairs.length; i++) {
1191             var pair = this.pairs[i];
1192             if (pair[1].apply(this, arguments)) {
1193                 return pair[2].apply(this, arguments);
1194             }
1195         }
1196         throw MochiKit.Base.NotFound;
1197     },
1198
1199     /** @id MochiKit.Base.AdapterRegistry.prototype.unregister */
1200     unregister: function (name) {
1201         for (var i = 0; i < this.pairs.length; i++) {
1202             var pair = this.pairs[i];
1203             if (pair[0] == name) {
1204                 this.pairs.splice(i, 1);
1205                 return true;
1206             }
1207         }
1208         return false;
1209     }
1210 };
1211
1212
1213 MochiKit.Base.EXPORT = [
1214     "flattenArray",
1215     "noop",
1216     "camelize",
1217     "counter",
1218     "clone",
1219     "extend",
1220     "update",
1221     "updatetree",
1222     "setdefault",
1223     "keys",
1224     "values",
1225     "items",
1226     "NamedError",
1227     "operator",
1228     "forwardCall",
1229     "itemgetter",
1230     "typeMatcher",
1231     "isCallable",
1232     "isUndefined",
1233     "isUndefinedOrNull",
1234     "isNull",
1235     "isEmpty",
1236     "isNotEmpty",
1237     "isArrayLike",
1238     "isDateLike",
1239     "xmap",
1240     "map",
1241     "xfilter",
1242     "filter",
1243     "methodcaller",
1244     "compose",
1245     "bind",
1246     "bindMethods",
1247     "NotFound",
1248     "AdapterRegistry",
1249     "registerComparator",
1250     "compare",
1251     "registerRepr",
1252     "repr",
1253     "objEqual",
1254     "arrayEqual",
1255     "concat",
1256     "keyComparator",
1257     "reverseKeyComparator",
1258     "partial",
1259     "merge",
1260     "listMinMax",
1261     "listMax",
1262     "listMin",
1263     "objMax",
1264     "objMin",
1265     "nodeWalk",
1266     "zip",
1267     "urlEncode",
1268     "queryString",
1269     "serializeJSON",
1270     "registerJSON",
1271     "evalJSON",
1272     "parseQueryString",
1273     "findValue",
1274     "findIdentical",
1275     "flattenArguments",
1276     "method",
1277     "average",
1278     "mean",
1279     "median"
1280 ];
1281
1282 MochiKit.Base.EXPORT_OK = [
1283     "nameFunctions",
1284     "comparatorRegistry",
1285     "reprRegistry",
1286     "jsonRegistry",
1287     "compareDateLike",
1288     "compareArrayLike",
1289     "reprArrayLike",
1290     "reprString",
1291     "reprNumber"
1292 ];
1293
1294 MochiKit.Base._exportSymbols = function (globals, module) {
1295     if (!MochiKit.__export__) {
1296         return;
1297     }
1298     var all = module.EXPORT_TAGS[":all"];
1299     for (var i = 0; i < all.length; i++) {
1300         globals[all[i]] = module[all[i]];
1301     }
1302 };
1303
1304 MochiKit.Base.__new__ = function () {
1305     // A singleton raised when no suitable adapter is found
1306     var m = this;
1307
1308     // convenience
1309     /** @id MochiKit.Base.noop */
1310     m.noop = m.operator.identity;
1311
1312     // Backwards compat
1313     m.forward = m.forwardCall;
1314     m.find = m.findValue;
1315
1316     if (typeof(encodeURIComponent) != "undefined") {
1317         /** @id MochiKit.Base.urlEncode */
1318         m.urlEncode = function (unencoded) {
1319             return encodeURIComponent(unencoded).replace(/\'/g, '%27');
1320         };
1321     } else {
1322         m.urlEncode = function (unencoded) {
1323             return escape(unencoded
1324                 ).replace(/\+/g, '%2B'
1325                 ).replace(/\"/g,'%22'
1326                 ).rval.replace(/\'/g, '%27');
1327         };
1328     }
1329
1330     /** @id MochiKit.Base.NamedError */
1331     m.NamedError = function (name) {
1332         this.message = name;
1333         this.name = name;
1334     };
1335     m.NamedError.prototype = new Error();
1336     m.update(m.NamedError.prototype, {
1337         repr: function () {
1338             if (this.message && this.message != this.name) {
1339                 return this.name + "(" + m.repr(this.message) + ")";
1340             } else {
1341                 return this.name + "()";
1342             }
1343         },
1344         toString: m.forwardCall("repr")
1345     });
1346
1347     /** @id MochiKit.Base.NotFound */
1348     m.NotFound = new m.NamedError("MochiKit.Base.NotFound");
1349
1350
1351     /** @id MochiKit.Base.listMax */
1352     m.listMax = m.partial(m.listMinMax, 1);
1353     /** @id MochiKit.Base.listMin */
1354     m.listMin = m.partial(m.listMinMax, -1);
1355
1356     /** @id MochiKit.Base.isCallable */
1357     m.isCallable = m.typeMatcher('function');
1358     /** @id MochiKit.Base.isUndefined */
1359     m.isUndefined = m.typeMatcher('undefined');
1360
1361     /** @id MochiKit.Base.merge */
1362     m.merge = m.partial(m.update, null);
1363     /** @id MochiKit.Base.zip */
1364     m.zip = m.partial(m.map, null);
1365
1366     /** @id MochiKit.Base.average */
1367     m.average = m.mean;
1368
1369     /** @id MochiKit.Base.comparatorRegistry */
1370     m.comparatorRegistry = new m.AdapterRegistry();
1371     m.registerComparator("dateLike", m.isDateLike, m.compareDateLike);
1372     m.registerComparator("arrayLike", m.isArrayLike, m.compareArrayLike);
1373
1374     /** @id MochiKit.Base.reprRegistry */
1375     m.reprRegistry = new m.AdapterRegistry();
1376     m.registerRepr("arrayLike", m.isArrayLike, m.reprArrayLike);
1377     m.registerRepr("string", m.typeMatcher("string"), m.reprString);
1378     m.registerRepr("numbers", m.typeMatcher("number", "boolean"), m.reprNumber);
1379
1380     /** @id MochiKit.Base.jsonRegistry */
1381     m.jsonRegistry = new m.AdapterRegistry();
1382
1383     var all = m.concat(m.EXPORT, m.EXPORT_OK);
1384     m.EXPORT_TAGS = {
1385         ":common": m.concat(m.EXPORT_OK),
1386         ":all": all
1387     };
1388
1389     m.nameFunctions(this);
1390
1391 };
1392
1393 MochiKit.Base.__new__();
1394
1395 //
1396 // XXX: Internet Explorer blows
1397 //
1398 if (MochiKit.__export__) {
1399     compare = MochiKit.Base.compare;
1400     compose = MochiKit.Base.compose;
1401     serializeJSON = MochiKit.Base.serializeJSON;
1402 }
1403
1404 MochiKit.Base._exportSymbols(this, MochiKit.Base);