modules/luci-base/htdocs/luci-static/resources/luci.js

   1 (function(window, document, undefined) {
   2         /* Object.assign polyfill for IE */
   3         if (typeof Object.assign !== 'function') {
   4                 Object.defineProperty(Object, 'assign', {
   5                         value: function assign(target, varArgs) {
   6                                 if (target == null)
   7                                         throw new TypeError('Cannot convert undefined or null to object');
   8
   9                                 var to = Object(target);
  10
  11                                 for (var index = 1; index < arguments.length; index++)
  12                                         if (arguments[index] != null)
  13                                                 for (var nextKey in arguments[index])
  14                                                         if (Object.prototype.hasOwnProperty.call(arguments[index], nextKey))
  15                                                                 to[nextKey] = arguments[index][nextKey];
  16
  17                                 return to;
  18                         },
  19                         writable: true,
  20                         configurable: true
  21                 });
  22         }
  23
  24         /*
  25          * Class declaration and inheritance helper
  26          */
  27
  28         var toCamelCase = function(s) {
  29                 return s.replace(/(?:^|[\. -])(.)/g, function(m0, m1) { return m1.toUpperCase() });
  30         };
  31
  32         var superContext = null, Class = Object.assign(function() {}, {
  33                 extend: function(properties) {
  34                         var props = {
  35                                 __base__: { value: this.prototype },
  36                                 __name__: { value: properties.__name__ || 'anonymous' }
  37                         };
  38
  39                         var ClassConstructor = function() {
  40                                 if (!(this instanceof ClassConstructor))
  41                                         throw new TypeError('Constructor must not be called without "new"');
  42
  43                                 if (Object.getPrototypeOf(this).hasOwnProperty('__init__')) {
  44                                         if (typeof(this.__init__) != 'function')
  45                                                 throw new TypeError('Class __init__ member is not a function');
  46
  47                                         this.__init__.apply(this, arguments)
  48                                 }
  49                                 else {
  50                                         this.super('__init__', arguments);
  51                                 }
  52                         };
  53
  54                         for (var key in properties)
  55                                 if (!props[key] && properties.hasOwnProperty(key))
  56                                         props[key] = { value: properties[key], writable: true };
  57
  58                         ClassConstructor.prototype = Object.create(this.prototype, props);
  59                         ClassConstructor.prototype.constructor = ClassConstructor;
  60                         Object.assign(ClassConstructor, this);
  61                         ClassConstructor.displayName = toCamelCase(props.__name__.value + 'Class');
  62
  63                         return ClassConstructor;
  64                 },
  65
  66                 singleton: function(properties /*, ... */) {
  67                         return Class.extend(properties)
  68                                 .instantiate(Class.prototype.varargs(arguments, 1));
  69                 },
  70
  71                 instantiate: function(args) {
  72                         return new (Function.prototype.bind.apply(this,
  73                                 Class.prototype.varargs(args, 0, null)))();
  74                 },
  75
  76                 call: function(self, method) {
  77                         if (typeof(this.prototype[method]) != 'function')
  78                                 throw new ReferenceError(method + ' is not defined in class');
  79
  80                         return this.prototype[method].apply(self, self.varargs(arguments, 1));
  81                 },
  82
  83                 isSubclass: function(_class) {
  84                         return (_class != null &&
  85                                 typeof(_class) == 'function' &&
  86                                 _class.prototype instanceof this);
  87                 },
  88
  89                 prototype: {
  90                         varargs: function(args, offset /*, ... */) {
  91                                 return Array.prototype.slice.call(arguments, 2)
  92                                         .concat(Array.prototype.slice.call(args, offset));
  93                         },
  94
  95                         super: function(key, callArgs) {
  96                                 for (superContext = Object.getPrototypeOf(superContext ||
  97                                                                           Object.getPrototypeOf(this));
  98                                      superContext && !superContext.hasOwnProperty(key);
  99                                      superContext = Object.getPrototypeOf(superContext)) { }
 100
 101                                 if (!superContext)
 102                                         return null;
 103
 104                                 var res = superContext[key];
 105
 106                                 if (arguments.length > 1) {
 107                                         if (typeof(res) != 'function')
 108                                                 throw new ReferenceError(key + ' is not a function in base class');
 109
 110                                         if (typeof(callArgs) != 'object')
 111                                                 callArgs = this.varargs(arguments, 1);
 112
 113                                         res = res.apply(this, callArgs);
 114                                 }
 115
 116                                 superContext = null;
 117
 118                                 return res;
 119                         },
 120
 121                         toString: function() {
 122                                 var s = '[' + this.constructor.displayName + ']', f = true;
 123                                 for (var k in this) {
 124                                         if (this.hasOwnProperty(k)) {
 125                                                 s += (f ? ' {\n' : '') + '  ' + k + ': ' + typeof(this[k]) + '\n';
 126                                                 f = false;
 127                                         }
 128                                 }
 129                                 return s + (f ? '' : '}');
 130                         }
 131                 }
 132         });
 133
 134
 135         /*
 136          * HTTP Request helper
 137          */
 138
 139         Headers = Class.extend({
 140                 __name__: 'LuCI.XHR.Headers',
 141                 __init__: function(xhr) {
 142                         var hdrs = this.headers = {};
 143                         xhr.getAllResponseHeaders().split(/\r\n/).forEach(function(line) {
 144                                 var m = /^([^:]+):(.*)$/.exec(line);
 145                                 if (m != null)
 146                                         hdrs[m[1].trim().toLowerCase()] = m[2].trim();
 147                         });
 148                 },
 149
 150                 has: function(name) {
 151                         return this.headers.hasOwnProperty(String(name).toLowerCase());
 152                 },
 153
 154                 get: function(name) {
 155                         var key = String(name).toLowerCase();
 156                         return this.headers.hasOwnProperty(key) ? this.headers[key] : null;
 157                 }
 158         });
 159
 160         Response = Class.extend({
 161                 __name__: 'LuCI.XHR.Response',
 162                 __init__: function(xhr, url, duration) {
 163                         this.ok = (xhr.status >= 200 && xhr.status <= 299);
 164                         this.status = xhr.status;
 165                         this.statusText = xhr.statusText;
 166                         this.responseText = xhr.responseText;
 167                         this.headers = new Headers(xhr);
 168                         this.duration = duration;
 169                         this.url = url;
 170                         this.xhr = xhr;
 171                 },
 172
 173                 json: function() {
 174                         return JSON.parse(this.responseText);
 175                 },
 176
 177                 text: function() {
 178                         return this.responseText;
 179                 }
 180         });
 181
 182         Request = Class.singleton({
 183                 __name__: 'LuCI.Request',
 184
 185                 interceptors: [],
 186
 187                 request: function(target, options) {
 188                         var state = { xhr: new XMLHttpRequest(), url: target, start: Date.now() },
 189                             opt = Object.assign({}, options, state),
 190                             content = null,
 191                             contenttype = null,
 192                             callback = this.handleReadyStateChange;
 193
 194                         return new Promise(function(resolveFn, rejectFn) {
 195                                 opt.xhr.onreadystatechange = callback.bind(opt, resolveFn, rejectFn);
 196                                 opt.method = String(opt.method || 'GET').toUpperCase();
 197
 198                                 if ('query' in opt) {
 199                                         var q = (opt.query != null) ? Object.keys(opt.query).map(function(k) {
 200                                                 if (opt.query[k] != null) {
 201                                                         var v = (typeof(opt.query[k]) == 'object')
 202                                                                 ? JSON.stringify(opt.query[k])
 203                                                                 : String(opt.query[k]);
 204
 205                                                         return '%s=%s'.format(encodeURIComponent(k), encodeURIComponent(v));
 206                                                 }
 207                                                 else {
 208                                                         return encodeURIComponent(k);
 209                                                 }
 210                                         }).join('&') : '';
 211
 212                                         if (q !== '') {
 213                                                 switch (opt.method) {
 214                                                 case 'GET':
 215                                                 case 'HEAD':
 216                                                 case 'OPTIONS':
 217                                                         opt.url += ((/\?/).test(opt.url) ? '&' : '?') + q;
 218                                                         break;
 219
 220                                                 default:
 221                                                         if (content == null) {
 222                                                                 content = q;
 223                                                                 contenttype = 'application/x-www-form-urlencoded';
 224                                                         }
 225                                                 }
 226                                         }
 227                                 }
 228
 229                                 if (!opt.cache)
 230                                         opt.url += ((/\?/).test(opt.url) ? '&' : '?') + (new Date()).getTime();
 231
 232                                 if (!/^(?:[^/]+:)?\/\//.test(opt.url))
 233                                         opt.url = location.protocol + '//' + location.host + opt.url;
 234
 235                                 if ('username' in opt && 'password' in opt)
 236                                         opt.xhr.open(opt.method, opt.url, true, opt.username, opt.password);
 237                                 else
 238                                         opt.xhr.open(opt.method, opt.url, true);
 239
 240                                 opt.xhr.responseType = 'text';
 241                                 opt.xhr.overrideMimeType('application/octet-stream');
 242
 243                                 if ('timeout' in opt)
 244                                         opt.xhr.timeout = +opt.timeout;
 245
 246                                 if ('credentials' in opt)
 247                                         opt.xhr.withCredentials = !!opt.credentials;
 248
 249                                 if (opt.content != null) {
 250                                         switch (typeof(opt.content)) {
 251                                         case 'function':
 252                                                 content = opt.content(xhr);
 253                                                 break;
 254
 255                                         case 'object':
 256                                                 content = JSON.stringify(opt.content);
 257                                                 contenttype = 'application/json';
 258                                                 break;
 259
 260                                         default:
 261                                                 content = String(opt.content);
 262                                         }
 263                                 }
 264
 265                                 if ('headers' in opt)
 266                                         for (var header in opt.headers)
 267                                                 if (opt.headers.hasOwnProperty(header)) {
 268                                                         if (header.toLowerCase() != 'content-type')
 269                                                                 opt.xhr.setRequestHeader(header, opt.headers[header]);
 270                                                         else
 271                                                                 contenttype = opt.headers[header];
 272                                                 }
 273
 274                                 if (contenttype != null)
 275                                         opt.xhr.setRequestHeader('Content-Type', contenttype);
 276
 277                                 try {
 278                                         opt.xhr.send(content);
 279                                 }
 280                                 catch (e) {
 281                                         rejectFn.call(opt, e);
 282                                 }
 283                         });
 284                 },
 285
 286                 handleReadyStateChange: function(resolveFn, rejectFn, ev) {
 287                         var xhr = this.xhr;
 288
 289                         if (xhr.readyState !== 4)
 290                                 return;
 291
 292                         if (xhr.status === 0 && xhr.statusText === '') {
 293                                 rejectFn.call(this, new Error('XHR request aborted by browser'));
 294                         }
 295                         else {
 296                                 var response = new Response(
 297                                         xhr, xhr.responseURL || this.url, Date.now() - this.start);
 298
 299                                 Promise.all(Request.interceptors.map(function(fn) { return fn(response) }))
 300                                         .then(resolveFn.bind(this, response))
 301                                         .catch(rejectFn.bind(this));
 302                         }
 303
 304                         try {
 305                                 xhr.abort();
 306                         }
 307                         catch(e) {}
 308                 },
 309
 310                 get: function(url, options) {
 311                         return this.request(url, Object.assign({ method: 'GET' }, options));
 312                 },
 313
 314                 post: function(url, data, options) {
 315                         return this.request(url, Object.assign({ method: 'POST', content: data }, options));
 316                 },
 317
 318                 addInterceptor: function(interceptorFn) {
 319                         if (typeof(interceptorFn) == 'function')
 320                                 this.interceptors.push(interceptorFn);
 321                         return interceptorFn;
 322                 },
 323
 324                 removeInterceptor: function(interceptorFn) {
 325                         var oldlen = this.interceptors.length, i = oldlen;
 326                         while (i--)
 327                                 if (this.interceptors[i] === interceptorFn)
 328                                         this.interceptors.splice(i, 1);
 329                         return (this.interceptors.length < oldlen);
 330                 },
 331
 332                 poll: Class.singleton({
 333                         __name__: 'LuCI.Request.Poll',
 334
 335                         queue: [],
 336
 337                         add: function(interval, url, options, callback) {
 338                                 if (isNaN(interval) || interval <= 0)
 339                                         throw new TypeError('Invalid poll interval');
 340
 341                                 var e = {
 342                                         interval: interval,
 343                                         url: url,
 344                                         options: options,
 345                                         callback: callback
 346                                 };
 347
 348                                 this.queue.push(e);
 349                                 return e;
 350                         },
 351
 352                         remove: function(entry) {
 353                                 var oldlen = this.queue.length, i = oldlen;
 354
 355                                 while (i--)
 356                                         if (this.queue[i] === entry) {
 357                                                 delete this.queue[i].running;
 358                                                 this.queue.splice(i, 1);
 359                                         }
 360
 361                                 if (!this.queue.length)
 362                                         this.stop();
 363
 364                                 return (this.queue.length < oldlen);
 365                         },
 366
 367                         start: function() {
 368                                 if (!this.queue.length || this.active())
 369                                         return false;
 370
 371                                 this.tick = 0;
 372                                 this.timer = window.setInterval(this.step, 1000);
 373                                 this.step();
 374                                 document.dispatchEvent(new CustomEvent('poll-start'));
 375                                 return true;
 376                         },
 377
 378                         stop: function() {
 379                                 if (!this.active())
 380                                         return false;
 381
 382                                 document.dispatchEvent(new CustomEvent('poll-stop'));
 383                                 window.clearInterval(this.timer);
 384                                 delete this.timer;
 385                                 delete this.tick;
 386                                 return true;
 387                         },
 388
 389                         step: function() {
 390                                 Request.poll.queue.forEach(function(e) {
 391                                         if ((Request.poll.tick % e.interval) != 0)
 392                                                 return;
 393
 394                                         if (e.running)
 395                                                 return;
 396
 397                                         var opts = Object.assign({}, e.options,
 398                                                 { timeout: e.interval * 1000 - 5 });
 399
 400                                         e.running = true;
 401                                         Request.request(e.url, opts)
 402                                                 .then(function(res) {
 403                                                         if (!e.running || !Request.poll.active())
 404                                                                 return;
 405
 406                                                         try {
 407                                                                 e.callback(res, res.json(), res.duration);
 408                                                         }
 409                                                         catch (err) {
 410                                                                 e.callback(res, null, res.duration);
 411                                                         }
 412                                                 })
 413                                                 .finally(function() { delete e.running });
 414                                 });
 415
 416                                 Request.poll.tick = (Request.poll.tick + 1) % Math.pow(2, 32);
 417                         },
 418
 419                         active: function() {
 420                                 return (this.timer != null);
 421                         }
 422                 })
 423         });
 424
 425
 426         var dummyElem = null,
 427             domParser = null,
 428             originalCBIInit = null,
 429             classes = {};
 430
 431         LuCI = Class.extend({
 432                 __name__: 'LuCI',
 433                 __init__: function(env) {
 434                         Object.assign(this.env, env);
 435
 436                         document.addEventListener('DOMContentLoaded', this.setupDOM.bind(this));
 437
 438                         document.addEventListener('poll-start', function(ev) {
 439                                 document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
 440                                         e.style.display = (e.id == 'xhr_poll_status_off') ? 'none' : '';
 441                                 });
 442                         });
 443
 444                         document.addEventListener('poll-stop', function(ev) {
 445                                 document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
 446                                         e.style.display = (e.id == 'xhr_poll_status_on') ? 'none' : '';
 447                                 });
 448                         });
 449
 450                         originalCBIInit = window.cbi_init;
 451                         window.cbi_init = function() {};
 452                 },
 453
 454                 error: function(type, fmt /*, ...*/) {
 455                         var e = null,
 456                             msg = fmt ? String.prototype.format.apply(fmt, this.varargs(arguments, 2)) : null,
 457                             stack = null;
 458
 459                         if (type instanceof Error) {
 460                                 e = type;
 461                                 stack = (e.stack || '').split(/\n/);
 462
 463                                 if (msg)
 464                                         e.message = msg + ': ' + e.message;
 465                         }
 466                         else {
 467                                 e = new (window[type || 'Error'] || Error)(msg || 'Unspecified error');
 468                                 e.name = type || 'Error';
 469
 470                                 try { throw new Error('stacktrace') }
 471                                 catch (e2) { stack = (e2.stack || '').split(/\n/) }
 472
 473                                 /* IE puts the exception message into the first line */
 474                                 if (stack[0] == 'Error: stacktrace')
 475                                         stack.shift();
 476
 477                                 /* Pop L.error() invocation from stack */
 478                                 stack.shift();
 479                         }
 480
 481                         /* Append shortened & beautified stacktrace to message */
 482                         e.message += '\n' + stack.join('\n')
 483                                 .replace(/(.*?)@(.+):(\d+):(\d+)/g, '  at $1 ($2:$3:$4)');
 484
 485                         if (window.console && console.debug)
 486                                 console.debug(e);
 487
 488                         throw e;
 489                 },
 490
 491                 /* Class require */
 492                 require: function(name, from) {
 493                         var L = this, url = null, from = from || [];
 494
 495                         /* Class already loaded */
 496                         if (classes[name] != null) {
 497                                 /* Circular dependency */
 498                                 if (from.indexOf(name) != -1)
 499                                         L.error('DependencyError',
 500                                                 'Circular dependency: class "%s" depends on "%s"',
 501                                                 name, from.join('" which depends on "'));
 502
 503                                 return classes[name];
 504                         }
 505
 506                         document.querySelectorAll('script[src$="/luci.js"]').forEach(function(s) {
 507                                 url = '%s/%s.js'.format(
 508                                         s.getAttribute('src').replace(/\/luci\.js$/, ''),
 509                                         name.replace(/\./g, '/'));
 510                         });
 511
 512                         if (url == null)
 513                                 L.error('InternalError', 'Cannot find url of luci.js');
 514
 515                         from = [ name ].concat(from);
 516
 517                         var compileClass = function(res) {
 518                                 if (!res.ok)
 519                                         L.error('NetworkError',
 520                                                 'HTTP error %d while loading class file "%s"', res.status, url);
 521
 522                                 var source = res.text(),
 523                                     reqmatch = /(?:^|\n)[ \t]*(?:["']require[ \t]+(\S+)(?:[ \t]+as[ \t]+([a-zA-Z_]\S*))?["']);/g,
 524                                     depends = [],
 525                                     args = '';
 526
 527                                 /* find require statements in source */
 528                                 for (var m = reqmatch.exec(source); m; m = reqmatch.exec(source)) {
 529                                         var dep = m[1], as = m[2] || dep.replace(/[^a-zA-Z0-9_]/g, '_');
 530                                         depends.push(L.require(dep, from));
 531                                         args += ', ' + as;
 532                                 }
 533
 534                                 /* load dependencies and instantiate class */
 535                                 return Promise.all(depends).then(function(instances) {
 536                                         try {
 537                                                 _factory = eval(
 538                                                         '(function(window, document, L%s) { %s })\n\n//# sourceURL=%s\n'
 539                                                                 .format(args, source, res.url));
 540                                         }
 541                                         catch (error) {
 542                                                 L.error('SyntaxError', '%s\n  in %s:%s',
 543                                                         error.message, res.url, error.lineNumber || '?');
 544                                         }
 545
 546                                         _factory.displayName = toCamelCase(name + 'ClassFactory');
 547                                         _class = _factory.apply(_factory, [window, document, L].concat(instances));
 548
 549                                         if (!Class.isSubclass(_class))
 550                                             L.error('TypeError', '"%s" factory yields invalid constructor', name);
 551
 552                                         if (_class.displayName == 'AnonymousClass')
 553                                                 _class.displayName = toCamelCase(name + 'Class');
 554
 555                                         var ptr = Object.getPrototypeOf(L),
 556                                             parts = name.split(/\./),
 557                                             instance = new _class();
 558
 559                                         for (var i = 0; ptr && i < parts.length - 1; i++)
 560                                                 ptr = ptr[parts[i]];
 561
 562                                         if (!ptr)
 563                                                 L.error('DependencyError',
 564                                                         'Parent "%s" for class "%s" is missing',
 565                                                         parts.slice(0, i).join('.'), name);
 566
 567                                         classes[name] = ptr[parts[i]] = instance;
 568
 569                                         return instance;
 570                                 });
 571                         };
 572
 573                         /* Request class file */
 574                         classes[name] = Request.get(url, { cache: true }).then(compileClass);
 575
 576                         return classes[name];
 577                 },
 578
 579                 /* DOM setup */
 580                 setupDOM: function(ev) {
 581                         Promise.all([
 582                                 L.require('ui')
 583                         ]).then(function() {
 584                                 Request.addInterceptor(function(res) {
 585                                         if (res.status != 403 || res.headers.get('X-LuCI-Login-Required') != 'yes')
 586                                                 return;
 587
 588                                         Request.poll.stop();
 589
 590                                         L.ui.showModal(_('Session expired'), [
 591                                                 E('div', { class: 'alert-message warning' },
 592                                                         _('A new login is required since the authentication session expired.')),
 593                                                 E('div', { class: 'right' },
 594                                                         E('div', {
 595                                                                 class: 'btn primary',
 596                                                                 click: function() {
 597                                                                         var loc = window.location;
 598                                                                         window.location = loc.protocol + '//' + loc.host + loc.pathname + loc.search;
 599                                                                 }
 600                                                         }, _('To login…')))
 601                                         ]);
 602
 603                                         L.error('AuthenticationError', 'Session expired');
 604                                 });
 605
 606                                 originalCBIInit();
 607                                 Request.poll.start();
 608
 609                                 document.dispatchEvent(new CustomEvent('luci-loaded'));
 610                         }).catch(function(error) {
 611                                 alert('LuCI class loading error:\n' + error);
 612                         });
 613                 },
 614
 615                 env: {},
 616
 617                 /* URL construction helpers */
 618                 path: function(prefix, parts) {
 619                         var url = [ prefix || '' ];
 620
 621                         for (var i = 0; i < parts.length; i++)
 622                                 if (/^(?:[a-zA-Z0-9_.%,;-]+\/)*[a-zA-Z0-9_.%,;-]+$/.test(parts[i]))
 623                                         url.push('/', parts[i]);
 624
 625                         if (url.length === 1)
 626                                 url.push('/');
 627
 628                         return url.join('');
 629                 },
 630
 631                 url: function() {
 632                         return this.path(this.env.scriptname, arguments);
 633                 },
 634
 635                 resource: function() {
 636                         return this.path(this.env.resource, arguments);
 637                 },
 638
 639                 location: function() {
 640                         return this.path(this.env.scriptname, this.env.requestpath);
 641                 },
 642
 643
 644                 /* HTTP resource fetching */
 645                 get: function(url, args, cb) {
 646                         return this.poll(null, url, args, cb, false);
 647                 },
 648
 649                 post: function(url, args, cb) {
 650                         return this.poll(null, url, args, cb, true);
 651                 },
 652
 653                 poll: function(interval, url, args, cb, post) {
 654                         if (interval !== null && interval <= 0)
 655                                 interval = this.env.pollinterval;
 656
 657                         var data = post ? { token: this.env.token } : null,
 658                             method = post ? 'POST' : 'GET';
 659
 660                         if (!/^(?:\/|\S+:\/\/)/.test(url))
 661                                 url = this.url(url);
 662
 663                         if (args != null)
 664                                 data = Object.assign(data || {}, args);
 665
 666                         if (interval !== null)
 667                                 return Request.poll.add(interval, url, { method: method, query: data }, cb);
 668                         else
 669                                 return Request.request(url, { method: method, query: data })
 670                                         .then(function(res) {
 671                                                 var json = null;
 672                                                 if (/^application\/json\b/.test(res.headers.get('Content-Type')))
 673                                                         try { json = res.json() } catch(e) {}
 674                                                 cb(res.xhr, json, res.duration);
 675                                         });
 676                 },
 677
 678                 stop: function(entry) { return Request.poll.remove(entry) },
 679                 halt: function() { return Request.poll.stop() },
 680                 run: function() { return Request.poll.start() },
 681
 682                 /* DOM manipulation */
 683                 dom: Class.singleton({
 684                         __name__: 'LuCI.DOM',
 685
 686                         elem: function(e) {
 687                                 return (e != null && typeof(e) == 'object' && 'nodeType' in e);
 688                         },
 689
 690                         parse: function(s) {
 691                                 var elem;
 692
 693                                 try {
 694                                         domParser = domParser || new DOMParser();
 695                                         elem = domParser.parseFromString(s, 'text/html').body.firstChild;
 696                                 }
 697                                 catch(e) {}
 698
 699                                 if (!elem) {
 700                                         try {
 701                                                 dummyElem = dummyElem || document.createElement('div');
 702                                                 dummyElem.innerHTML = s;
 703                                                 elem = dummyElem.firstChild;
 704                                         }
 705                                         catch (e) {}
 706                                 }
 707
 708                                 return elem || null;
 709                         },
 710
 711                         matches: function(node, selector) {
 712                                 var m = this.elem(node) ? node.matches || node.msMatchesSelector : null;
 713                                 return m ? m.call(node, selector) : false;
 714                         },
 715
 716                         parent: function(node, selector) {
 717                                 if (this.elem(node) && node.closest)
 718                                         return node.closest(selector);
 719
 720                                 while (this.elem(node))
 721                                         if (this.matches(node, selector))
 722                                                 return node;
 723                                         else
 724                                                 node = node.parentNode;
 725
 726                                 return null;
 727                         },
 728
 729                         append: function(node, children) {
 730                                 if (!this.elem(node))
 731                                         return null;
 732
 733                                 if (Array.isArray(children)) {
 734                                         for (var i = 0; i < children.length; i++)
 735                                                 if (this.elem(children[i]))
 736                                                         node.appendChild(children[i]);
 737                                                 else if (children !== null && children !== undefined)
 738                                                         node.appendChild(document.createTextNode('' + children[i]));
 739
 740                                         return node.lastChild;
 741                                 }
 742                                 else if (typeof(children) === 'function') {
 743                                         return this.append(node, children(node));
 744                                 }
 745                                 else if (this.elem(children)) {
 746                                         return node.appendChild(children);
 747                                 }
 748                                 else if (children !== null && children !== undefined) {
 749                                         node.innerHTML = '' + children;
 750                                         return node.lastChild;
 751                                 }
 752
 753                                 return null;
 754                         },
 755
 756                         content: function(node, children) {
 757                                 if (!this.elem(node))
 758                                         return null;
 759
 760                                 while (node.firstChild)
 761                                         node.removeChild(node.firstChild);
 762
 763                                 return this.append(node, children);
 764                         },
 765
 766                         attr: function(node, key, val) {
 767                                 if (!this.elem(node))
 768                                         return null;
 769
 770                                 var attr = null;
 771
 772                                 if (typeof(key) === 'object' && key !== null)
 773                                         attr = key;
 774                                 else if (typeof(key) === 'string')
 775                                         attr = {}, attr[key] = val;
 776
 777                                 for (key in attr) {
 778                                         if (!attr.hasOwnProperty(key) || attr[key] == null)
 779                                                 continue;
 780
 781                                         switch (typeof(attr[key])) {
 782                                         case 'function':
 783                                                 node.addEventListener(key, attr[key]);
 784                                                 break;
 785
 786                                         case 'object':
 787                                                 node.setAttribute(key, JSON.stringify(attr[key]));
 788                                                 break;
 789
 790                                         default:
 791                                                 node.setAttribute(key, attr[key]);
 792                                         }
 793                                 }
 794                         },
 795
 796                         create: function() {
 797                                 var html = arguments[0],
 798                                     attr = arguments[1],
 799                                     data = arguments[2],
 800                                     elem;
 801
 802                                 if (!(attr instanceof Object) || Array.isArray(attr))
 803                                         data = attr, attr = null;
 804
 805                                 if (Array.isArray(html)) {
 806                                         elem = document.createDocumentFragment();
 807                                         for (var i = 0; i < html.length; i++)
 808                                                 elem.appendChild(this.create(html[i]));
 809                                 }
 810                                 else if (this.elem(html)) {
 811                                         elem = html;
 812                                 }
 813                                 else if (html.charCodeAt(0) === 60) {
 814                                         elem = this.parse(html);
 815                                 }
 816                                 else {
 817                                         elem = document.createElement(html);
 818                                 }
 819
 820                                 if (!elem)
 821                                         return null;
 822
 823                                 this.attr(elem, attr);
 824                                 this.append(elem, data);
 825
 826                                 return elem;
 827                         }
 828                 }),
 829
 830                 Class: Class,
 831                 Request: Request
 832         });
 833
 834         XHR = Class.extend({
 835                 __name__: 'LuCI.XHR',
 836                 __init__: function() {
 837                         if (window.console && console.debug)
 838                                 console.debug('Direct use XHR() is deprecated, please use L.Request instead');
 839                 },
 840
 841                 _response: function(cb, res, json, duration) {
 842                         if (this.active)
 843                                 cb(res, json, duration);
 844                         delete this.active;
 845                 },
 846
 847                 get: function(url, data, callback, timeout) {
 848                         this.active = true;
 849                         L.get(url, data, this._response.bind(this, callback), timeout);
 850                 },
 851
 852                 post: function(url, data, callback, timeout) {
 853                         this.active = true;
 854                         L.post(url, data, this._response.bind(this, callback), timeout);
 855                 },
 856
 857                 cancel: function() { delete this.active },
 858                 busy: function() { return (this.active === true) },
 859                 abort: function() {},
 860                 send_form: function() { L.error('InternalError', 'Not implemented') },
 861         });
 862
 863         XHR.get = function() { return window.L.get.apply(window.L, arguments) };
 864         XHR.post = function() { return window.L.post.apply(window.L, arguments) };
 865         XHR.poll = function() { return window.L.poll.apply(window.L, arguments) };
 866         XHR.stop = Request.poll.remove.bind(Request.poll);
 867         XHR.halt = Request.poll.stop.bind(Request.poll);
 868         XHR.run = Request.poll.start.bind(Request.poll);
 869         XHR.running = Request.poll.active.bind(Request.poll);
 870
 871         window.XHR = XHR;
 872         window.LuCI = LuCI;
 873 })(window, document);