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('poll-start', function(ev) {
 437                                 document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
 438                                         e.style.display = (e.id == 'xhr_poll_status_off') ? 'none' : '';
 439                                 });
 440                         });
 441
 442                         document.addEventListener('poll-stop', function(ev) {
 443                                 document.querySelectorAll('[id^="xhr_poll_status"]').forEach(function(e) {
 444                                         e.style.display = (e.id == 'xhr_poll_status_on') ? 'none' : '';
 445                                 });
 446                         });
 447
 448                         var domReady = new Promise(function(resolveFn, rejectFn) {
 449                                 document.addEventListener('DOMContentLoaded', resolveFn);
 450                         });
 451
 452                         Promise.all([
 453                                 domReady,
 454                                 this.require('ui'),
 455                                 this.require('form')
 456                         ]).then(this.setupDOM.bind(this)).catch(function(error) {
 457                                 alert('LuCI class loading error:\n' + error);
 458                         });
 459
 460                         originalCBIInit = window.cbi_init;
 461                         window.cbi_init = function() {};
 462                 },
 463
 464                 error: function(type, fmt /*, ...*/) {
 465                         var e = null,
 466                             msg = fmt ? String.prototype.format.apply(fmt, this.varargs(arguments, 2)) : null,
 467                             stack = null;
 468
 469                         if (type instanceof Error) {
 470                                 e = type;
 471                                 stack = (e.stack || '').split(/\n/);
 472
 473                                 if (msg)
 474                                         e.message = msg + ': ' + e.message;
 475                         }
 476                         else {
 477                                 e = new (window[type || 'Error'] || Error)(msg || 'Unspecified error');
 478                                 e.name = type || 'Error';
 479
 480                                 try { throw new Error('stacktrace') }
 481                                 catch (e2) { stack = (e2.stack || '').split(/\n/) }
 482
 483                                 /* IE puts the exception message into the first line */
 484                                 if (stack[0] == 'Error: stacktrace')
 485                                         stack.shift();
 486
 487                                 /* Pop L.error() invocation from stack */
 488                                 stack.shift();
 489                         }
 490
 491                         /* Append shortened & beautified stacktrace to message */
 492                         var trace = stack.join('\n')
 493                                 .replace(/(.*?)@(.+):(\d+):(\d+)/g, '  at $1 ($2:$3:$4)');
 494
 495                         if (e.message.indexOf(trace) == -1)
 496                                 e.message += '\n' + trace;
 497
 498                         if (window.console && console.debug)
 499                                 console.debug(e);
 500
 501                         if (this.ui)
 502                                 this.ui.showModal(_('Runtime error'),
 503                                         E('pre', { 'class': 'alert-message error' }, e));
 504                         else
 505                                 L.dom.content(document.querySelector('#maincontent'),
 506                                         E('pre', { 'class': 'alert-message error' }, e));
 507
 508                         throw e;
 509                 },
 510
 511                 bind: function(fn, self /*, ... */) {
 512                         return Function.prototype.bind.apply(fn, this.varargs(arguments, 2, self));
 513                 },
 514
 515                 /* Class require */
 516                 require: function(name, from) {
 517                         var L = this, url = null, from = from || [];
 518
 519                         /* Class already loaded */
 520                         if (classes[name] != null) {
 521                                 /* Circular dependency */
 522                                 if (from.indexOf(name) != -1)
 523                                         L.error('DependencyError',
 524                                                 'Circular dependency: class "%s" depends on "%s"',
 525                                                 name, from.join('" which depends on "'));
 526
 527                                 return classes[name];
 528                         }
 529
 530                         document.querySelectorAll('script[src$="/luci.js"]').forEach(function(s) {
 531                                 url = '%s/%s.js'.format(
 532                                         s.getAttribute('src').replace(/\/luci\.js$/, ''),
 533                                         name.replace(/\./g, '/'));
 534                         });
 535
 536                         if (url == null)
 537                                 L.error('InternalError', 'Cannot find url of luci.js');
 538
 539                         from = [ name ].concat(from);
 540
 541                         var compileClass = function(res) {
 542                                 if (!res.ok)
 543                                         L.error('NetworkError',
 544                                                 'HTTP error %d while loading class file "%s"', res.status, url);
 545
 546                                 var source = res.text(),
 547                                     reqmatch = /(?:^|\n)[ \t]*(?:["']require[ \t]+(\S+)(?:[ \t]+as[ \t]+([a-zA-Z_]\S*))?["']);/g,
 548                                     depends = [],
 549                                     args = '';
 550
 551                                 /* find require statements in source */
 552                                 for (var m = reqmatch.exec(source); m; m = reqmatch.exec(source)) {
 553                                         var dep = m[1], as = m[2] || dep.replace(/[^a-zA-Z0-9_]/g, '_');
 554                                         depends.push(L.require(dep, from));
 555                                         args += ', ' + as;
 556                                 }
 557
 558                                 /* load dependencies and instantiate class */
 559                                 return Promise.all(depends).then(function(instances) {
 560                                         try {
 561                                                 _factory = eval(
 562                                                         '(function(window, document, L%s) { %s })\n\n//# sourceURL=%s\n'
 563                                                                 .format(args, source, res.url));
 564                                         }
 565                                         catch (error) {
 566                                                 L.error('SyntaxError', '%s\n  in %s:%s',
 567                                                         error.message, res.url, error.lineNumber || '?');
 568                                         }
 569
 570                                         _factory.displayName = toCamelCase(name + 'ClassFactory');
 571                                         _class = _factory.apply(_factory, [window, document, L].concat(instances));
 572
 573                                         if (!Class.isSubclass(_class))
 574                                             L.error('TypeError', '"%s" factory yields invalid constructor', name);
 575
 576                                         if (_class.displayName == 'AnonymousClass')
 577                                                 _class.displayName = toCamelCase(name + 'Class');
 578
 579                                         var ptr = Object.getPrototypeOf(L),
 580                                             parts = name.split(/\./),
 581                                             instance = new _class();
 582
 583                                         for (var i = 0; ptr && i < parts.length - 1; i++)
 584                                                 ptr = ptr[parts[i]];
 585
 586                                         if (ptr)
 587                                                 ptr[parts[i]] = instance;
 588
 589                                         classes[name] = instance;
 590
 591                                         return instance;
 592                                 });
 593                         };
 594
 595                         /* Request class file */
 596                         classes[name] = Request.get(url, { cache: true })
 597                                 .then(compileClass)
 598                                 .catch(L.error);
 599
 600                         return classes[name];
 601                 },
 602
 603                 /* DOM setup */
 604                 setupDOM: function(ev) {
 605                         Request.addInterceptor(function(res) {
 606                                 if (res.status != 403 || res.headers.get('X-LuCI-Login-Required') != 'yes')
 607                                         return;
 608
 609                                 Request.poll.stop();
 610
 611                                 L.ui.showModal(_('Session expired'), [
 612                                         E('div', { class: 'alert-message warning' },
 613                                                 _('A new login is required since the authentication session expired.')),
 614                                         E('div', { class: 'right' },
 615                                                 E('div', {
 616                                                         class: 'btn primary',
 617                                                         click: function() {
 618                                                                 var loc = window.location;
 619                                                                 window.location = loc.protocol + '//' + loc.host + loc.pathname + loc.search;
 620                                                         }
 621                                                 }, _('To login…')))
 622                                 ]);
 623
 624                                 throw 'Session expired';
 625                         });
 626
 627                         originalCBIInit();
 628                         Request.poll.start();
 629
 630                         document.dispatchEvent(new CustomEvent('luci-loaded'));
 631                 },
 632
 633                 env: {},
 634
 635                 /* URL construction helpers */
 636                 path: function(prefix, parts) {
 637                         var url = [ prefix || '' ];
 638
 639                         for (var i = 0; i < parts.length; i++)
 640                                 if (/^(?:[a-zA-Z0-9_.%,;-]+\/)*[a-zA-Z0-9_.%,;-]+$/.test(parts[i]))
 641                                         url.push('/', parts[i]);
 642
 643                         if (url.length === 1)
 644                                 url.push('/');
 645
 646                         return url.join('');
 647                 },
 648
 649                 url: function() {
 650                         return this.path(this.env.scriptname, arguments);
 651                 },
 652
 653                 resource: function() {
 654                         return this.path(this.env.resource, arguments);
 655                 },
 656
 657                 location: function() {
 658                         return this.path(this.env.scriptname, this.env.requestpath);
 659                 },
 660
 661
 662                 /* HTTP resource fetching */
 663                 get: function(url, args, cb) {
 664                         return this.poll(null, url, args, cb, false);
 665                 },
 666
 667                 post: function(url, args, cb) {
 668                         return this.poll(null, url, args, cb, true);
 669                 },
 670
 671                 poll: function(interval, url, args, cb, post) {
 672                         if (interval !== null && interval <= 0)
 673                                 interval = this.env.pollinterval;
 674
 675                         var data = post ? { token: this.env.token } : null,
 676                             method = post ? 'POST' : 'GET';
 677
 678                         if (!/^(?:\/|\S+:\/\/)/.test(url))
 679                                 url = this.url(url);
 680
 681                         if (args != null)
 682                                 data = Object.assign(data || {}, args);
 683
 684                         if (interval !== null)
 685                                 return Request.poll.add(interval, url, { method: method, query: data }, cb);
 686                         else
 687                                 return Request.request(url, { method: method, query: data })
 688                                         .then(function(res) {
 689                                                 var json = null;
 690                                                 if (/^application\/json\b/.test(res.headers.get('Content-Type')))
 691                                                         try { json = res.json() } catch(e) {}
 692                                                 cb(res.xhr, json, res.duration);
 693                                         });
 694                 },
 695
 696                 stop: function(entry) { return Request.poll.remove(entry) },
 697                 halt: function() { return Request.poll.stop() },
 698                 run: function() { return Request.poll.start() },
 699
 700                 /* DOM manipulation */
 701                 dom: Class.singleton({
 702                         __name__: 'LuCI.DOM',
 703
 704                         elem: function(e) {
 705                                 return (e != null && typeof(e) == 'object' && 'nodeType' in e);
 706                         },
 707
 708                         parse: function(s) {
 709                                 var elem;
 710
 711                                 try {
 712                                         domParser = domParser || new DOMParser();
 713                                         elem = domParser.parseFromString(s, 'text/html').body.firstChild;
 714                                 }
 715                                 catch(e) {}
 716
 717                                 if (!elem) {
 718                                         try {
 719                                                 dummyElem = dummyElem || document.createElement('div');
 720                                                 dummyElem.innerHTML = s;
 721                                                 elem = dummyElem.firstChild;
 722                                         }
 723                                         catch (e) {}
 724                                 }
 725
 726                                 return elem || null;
 727                         },
 728
 729                         matches: function(node, selector) {
 730                                 var m = this.elem(node) ? node.matches || node.msMatchesSelector : null;
 731                                 return m ? m.call(node, selector) : false;
 732                         },
 733
 734                         parent: function(node, selector) {
 735                                 if (this.elem(node) && node.closest)
 736                                         return node.closest(selector);
 737
 738                                 while (this.elem(node))
 739                                         if (this.matches(node, selector))
 740                                                 return node;
 741                                         else
 742                                                 node = node.parentNode;
 743
 744                                 return null;
 745                         },
 746
 747                         append: function(node, children) {
 748                                 if (!this.elem(node))
 749                                         return null;
 750
 751                                 if (Array.isArray(children)) {
 752                                         for (var i = 0; i < children.length; i++)
 753                                                 if (this.elem(children[i]))
 754                                                         node.appendChild(children[i]);
 755                                                 else if (children !== null && children !== undefined)
 756                                                         node.appendChild(document.createTextNode('' + children[i]));
 757
 758                                         return node.lastChild;
 759                                 }
 760                                 else if (typeof(children) === 'function') {
 761                                         return this.append(node, children(node));
 762                                 }
 763                                 else if (this.elem(children)) {
 764                                         return node.appendChild(children);
 765                                 }
 766                                 else if (children !== null && children !== undefined) {
 767                                         node.innerHTML = '' + children;
 768                                         return node.lastChild;
 769                                 }
 770
 771                                 return null;
 772                         },
 773
 774                         content: function(node, children) {
 775                                 if (!this.elem(node))
 776                                         return null;
 777
 778                                 var dataNodes = node.querySelectorAll('[data-idref]');
 779
 780                                 for (var i = 0; i < dataNodes.length; i++)
 781                                         delete this.registry[dataNodes[i].getAttribute('data-idref')];
 782
 783                                 while (node.firstChild)
 784                                         node.removeChild(node.firstChild);
 785
 786                                 return this.append(node, children);
 787                         },
 788
 789                         attr: function(node, key, val) {
 790                                 if (!this.elem(node))
 791                                         return null;
 792
 793                                 var attr = null;
 794
 795                                 if (typeof(key) === 'object' && key !== null)
 796                                         attr = key;
 797                                 else if (typeof(key) === 'string')
 798                                         attr = {}, attr[key] = val;
 799
 800                                 for (key in attr) {
 801                                         if (!attr.hasOwnProperty(key) || attr[key] == null)
 802                                                 continue;
 803
 804                                         switch (typeof(attr[key])) {
 805                                         case 'function':
 806                                                 node.addEventListener(key, attr[key]);
 807                                                 break;
 808
 809                                         case 'object':
 810                                                 node.setAttribute(key, JSON.stringify(attr[key]));
 811                                                 break;
 812
 813                                         default:
 814                                                 node.setAttribute(key, attr[key]);
 815                                         }
 816                                 }
 817                         },
 818
 819                         create: function() {
 820                                 var html = arguments[0],
 821                                     attr = arguments[1],
 822                                     data = arguments[2],
 823                                     elem;
 824
 825                                 if (!(attr instanceof Object) || Array.isArray(attr))
 826                                         data = attr, attr = null;
 827
 828                                 if (Array.isArray(html)) {
 829                                         elem = document.createDocumentFragment();
 830                                         for (var i = 0; i < html.length; i++)
 831                                                 elem.appendChild(this.create(html[i]));
 832                                 }
 833                                 else if (this.elem(html)) {
 834                                         elem = html;
 835                                 }
 836                                 else if (html.charCodeAt(0) === 60) {
 837                                         elem = this.parse(html);
 838                                 }
 839                                 else {
 840                                         elem = document.createElement(html);
 841                                 }
 842
 843                                 if (!elem)
 844                                         return null;
 845
 846                                 this.attr(elem, attr);
 847                                 this.append(elem, data);
 848
 849                                 return elem;
 850                         },
 851
 852                         registry: {},
 853
 854                         data: function(node, key, val) {
 855                                 var id = node.getAttribute('data-idref');
 856
 857                                 /* clear all data */
 858                                 if (arguments.length > 1 && key == null) {
 859                                         if (id != null) {
 860                                                 node.removeAttribute('data-idref');
 861                                                 val = this.registry[id]
 862                                                 delete this.registry[id];
 863                                                 return val;
 864                                         }
 865
 866                                         return null;
 867                                 }
 868
 869                                 /* clear a key */
 870                                 else if (arguments.length > 2 && key != null && val == null) {
 871                                         if (id != null) {
 872                                                 val = this.registry[id][key];
 873                                                 delete this.registry[id][key];
 874                                                 return val;
 875                                         }
 876
 877                                         return null;
 878                                 }
 879
 880                                 /* set a key */
 881                                 else if (arguments.length > 2 && key != null && val != null) {
 882                                         if (id == null) {
 883                                                 do { id = Math.floor(Math.random() * 0xffffffff).toString(16) }
 884                                                 while (this.registry.hasOwnProperty(id));
 885
 886                                                 node.setAttribute('data-idref', id);
 887                                                 this.registry[id] = {};
 888                                         }
 889
 890                                         return (this.registry[id][key] = val);
 891                                 }
 892
 893                                 /* get all data */
 894                                 else if (arguments.length == 1) {
 895                                         if (id != null)
 896                                                 return this.registry[id];
 897
 898                                         return null;
 899                                 }
 900
 901                                 /* get a key */
 902                                 else if (arguments.length == 2) {
 903                                         if (id != null)
 904                                                 return this.registry[id][key];
 905                                 }
 906
 907                                 return null;
 908                         },
 909
 910                         bindClassInstance: function(node, inst) {
 911                                 if (!(inst instanceof Class))
 912                                         L.error('TypeError', 'Argument must be a class instance');
 913
 914                                 return this.data(node, '_class', inst);
 915                         },
 916
 917                         findClassInstance: function(node) {
 918                                 var inst = null;
 919
 920                                 do {
 921                                         inst = this.data(node, '_class');
 922                                         node = node.parentNode;
 923                                 }
 924                                 while (!(inst instanceof Class) && node != null);
 925
 926                                 return inst;
 927                         },
 928
 929                         callClassMethod: function(node, method /*, ... */) {
 930                                 var inst = this.findClassInstance(node);
 931
 932                                 if (inst == null || typeof(inst[method]) != 'function')
 933                                         return null;
 934
 935                                 return inst[method].apply(inst, inst.varargs(arguments, 2));
 936                         }
 937                 }),
 938
 939                 Class: Class,
 940                 Request: Request,
 941
 942                 view: Class.extend({
 943                         __name__: 'LuCI.View',
 944
 945                         __init__: function() {
 946                                 var vp = document.getElementById('view');
 947
 948                                 L.dom.content(vp, E('div', { 'class': 'spinning' }, _('Loading view…')));
 949
 950                                 return Promise.resolve(this.load())
 951                                         .then(L.bind(this.render, this))
 952                                         .then(L.bind(function(nodes) {
 953                                                 var vp = document.getElementById('view');
 954
 955                                                 L.dom.content(vp, nodes);
 956                                                 L.dom.append(vp, this.addFooter());
 957                                         }, this)).catch(L.error);
 958                         },
 959
 960                         load: function() {},
 961                         render: function() {},
 962
 963                         handleSave: function(ev) {
 964                                 var tasks = [];
 965
 966                                 document.getElementById('maincontent')
 967                                         .querySelectorAll('.cbi-map').forEach(function(map) {
 968                                                 tasks.push(L.dom.callClassMethod(map, 'save'));
 969                                         });
 970
 971                                 return Promise.all(tasks);
 972                         },
 973
 974                         handleSaveApply: function(ev) {
 975                                 return this.handleSave(ev).then(function() {
 976                                         L.ui.changes.apply(true);
 977                                 });
 978                         },
 979
 980                         handleReset: function(ev) {
 981                                 var tasks = [];
 982
 983                                 document.getElementById('maincontent')
 984                                         .querySelectorAll('.cbi-map').forEach(function(map) {
 985                                                 tasks.push(L.dom.callClassMethod(map, 'reset'));
 986                                         });
 987
 988                                 return Promise.all(tasks);
 989                         },
 990
 991                         addFooter: function() {
 992                                 var footer = E([]),
 993                                     mc = document.getElementById('maincontent');
 994
 995                                 if (mc.querySelector('.cbi-map')) {
 996                                         footer.appendChild(E('div', { 'class': 'cbi-page-actions' }, [
 997                                                 E('input', {
 998                                                         'class': 'cbi-button cbi-button-apply',
 999                                                         'type': 'button',
1000                                                         'value': _('Save & Apply'),
1001                                                         'click': L.bind(this.handleSaveApply, this)
1002                                                 }), ' ',
1003                                                 E('input', {
1004                                                         'class': 'cbi-button cbi-button-save',
1005                                                         'type': 'submit',
1006                                                         'value': _('Save'),
1007                                                         'click': L.bind(this.handleSave, this)
1008                                                 }), ' ',
1009                                                 E('input', {
1010                                                         'class': 'cbi-button cbi-button-reset',
1011                                                         'type': 'button',
1012                                                         'value': _('Reset'),
1013                                                         'click': L.bind(this.handleReset, this)
1014                                                 })
1015                                         ]));
1016                                 }
1017
1018                                 return footer;
1019                         }
1020                 })
1021         });
1022
1023         XHR = Class.extend({
1024                 __name__: 'LuCI.XHR',
1025                 __init__: function() {
1026                         if (window.console && console.debug)
1027                                 console.debug('Direct use XHR() is deprecated, please use L.Request instead');
1028                 },
1029
1030                 _response: function(cb, res, json, duration) {
1031                         if (this.active)
1032                                 cb(res, json, duration);
1033                         delete this.active;
1034                 },
1035
1036                 get: function(url, data, callback, timeout) {
1037                         this.active = true;
1038                         L.get(url, data, this._response.bind(this, callback), timeout);
1039                 },
1040
1041                 post: function(url, data, callback, timeout) {
1042                         this.active = true;
1043                         L.post(url, data, this._response.bind(this, callback), timeout);
1044                 },
1045
1046                 cancel: function() { delete this.active },
1047                 busy: function() { return (this.active === true) },
1048                 abort: function() {},
1049                 send_form: function() { L.error('InternalError', 'Not implemented') },
1050         });
1051
1052         XHR.get = function() { return window.L.get.apply(window.L, arguments) };
1053         XHR.post = function() { return window.L.post.apply(window.L, arguments) };
1054         XHR.poll = function() { return window.L.poll.apply(window.L, arguments) };
1055         XHR.stop = Request.poll.remove.bind(Request.poll);
1056         XHR.halt = Request.poll.stop.bind(Request.poll);
1057         XHR.run = Request.poll.start.bind(Request.poll);
1058         XHR.running = Request.poll.active.bind(Request.poll);
1059
1060         window.XHR = XHR;
1061         window.LuCI = LuCI;
1062 })(window, document);