src/third_party/WebKit/Source/devtools/front_end/ResourceTreeModel.js

   1 /*
   2  * Copyright (C) 2011 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /**
  32  * @constructor
  33  * @extends {WebInspector.Object}
  34  * @param {!WebInspector.Target} target
  35  */
  36 WebInspector.ResourceTreeModel = function(target)
  37 {
  38     target.networkManager.addEventListener(WebInspector.NetworkManager.EventTypes.RequestFinished, this._onRequestFinished, this);
  39     target.networkManager.addEventListener(WebInspector.NetworkManager.EventTypes.RequestUpdateDropped, this._onRequestUpdateDropped, this);
  40
  41     target.consoleModel.addEventListener(WebInspector.ConsoleModel.Events.MessageAdded, this._consoleMessageAdded, this);
  42     target.consoleModel.addEventListener(WebInspector.ConsoleModel.Events.ConsoleCleared, this._consoleCleared, this);
  43
  44     this._agent = target.pageAgent();
  45     this._agent.enable();
  46
  47     this._fetchResourceTree();
  48
  49     target.registerPageDispatcher(new WebInspector.PageDispatcher(this));
  50
  51     this._pendingConsoleMessages = {};
  52     this._securityOriginFrameCount = {};
  53     this._inspectedPageURL = "";
  54 }
  55
  56 WebInspector.ResourceTreeModel.EventTypes = {
  57     FrameAdded: "FrameAdded",
  58     FrameNavigated: "FrameNavigated",
  59     FrameDetached: "FrameDetached",
  60     FrameResized: "FrameResized",
  61     MainFrameNavigated: "MainFrameNavigated",
  62     MainFrameCreatedOrNavigated: "MainFrameCreatedOrNavigated",
  63     ResourceAdded: "ResourceAdded",
  64     WillLoadCachedResources: "WillLoadCachedResources",
  65     CachedResourcesLoaded: "CachedResourcesLoaded",
  66     DOMContentLoaded: "DOMContentLoaded",
  67     Load: "Load",
  68     WillReloadPage: "WillReloadPage",
  69     InspectedURLChanged: "InspectedURLChanged",
  70     SecurityOriginAdded: "SecurityOriginAdded",
  71     SecurityOriginRemoved: "SecurityOriginRemoved",
  72     ScreencastFrame: "ScreencastFrame",
  73     ScreencastVisibilityChanged: "ScreencastVisibilityChanged"
  74 }
  75
  76 WebInspector.ResourceTreeModel.prototype = {
  77     _fetchResourceTree: function()
  78     {
  79         /** @type {!Object.<string, !WebInspector.ResourceTreeFrame>} */
  80         this._frames = {};
  81         delete this._cachedResourcesProcessed;
  82         this._agent.getResourceTree(this._processCachedResources.bind(this));
  83     },
  84
  85     _processCachedResources: function(error, mainFramePayload)
  86     {
  87         if (error) {
  88             console.error(JSON.stringify(error));
  89             return;
  90         }
  91
  92         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.WillLoadCachedResources);
  93         this._inspectedPageURL = mainFramePayload.frame.url;
  94         this._addFramesRecursively(null, mainFramePayload);
  95         this._dispatchInspectedURLChanged();
  96         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.CachedResourcesLoaded);
  97         this._cachedResourcesProcessed = true;
  98     },
  99
 100     /**
 101      * @return {string}
 102      */
 103     inspectedPageURL: function()
 104     {
 105         return this._inspectedPageURL;
 106     },
 107
 108     /**
 109      * @return {string}
 110      */
 111     inspectedPageDomain: function()
 112     {
 113         var parsedURL = this._inspectedPageURL ? this._inspectedPageURL.asParsedURL() : null;
 114         return parsedURL ? parsedURL.host : "";
 115     },
 116
 117     /**
 118      * @return {boolean}
 119      */
 120     cachedResourcesLoaded: function()
 121     {
 122         return this._cachedResourcesProcessed;
 123     },
 124
 125     _dispatchInspectedURLChanged: function()
 126     {
 127         InspectorFrontendHost.inspectedURLChanged(this._inspectedPageURL);
 128         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.InspectedURLChanged, this._inspectedPageURL);
 129     },
 130
 131     /**
 132      * @param {!WebInspector.ResourceTreeFrame} frame
 133      * @param {boolean=} aboutToNavigate
 134      */
 135     _addFrame: function(frame, aboutToNavigate)
 136     {
 137         this._frames[frame.id] = frame;
 138         if (frame.isMainFrame())
 139             this.mainFrame = frame;
 140         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameAdded, frame);
 141         if (!aboutToNavigate)
 142             this._addSecurityOrigin(frame.securityOrigin);
 143         if (frame.isMainFrame())
 144             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.MainFrameCreatedOrNavigated, frame);
 145     },
 146
 147     /**
 148      * @param {string} securityOrigin
 149      */
 150     _addSecurityOrigin: function(securityOrigin)
 151     {
 152         if (!this._securityOriginFrameCount[securityOrigin]) {
 153             this._securityOriginFrameCount[securityOrigin] = 1;
 154             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginAdded, securityOrigin);
 155             return;
 156         }
 157         this._securityOriginFrameCount[securityOrigin] += 1;
 158     },
 159
 160     /**
 161      * @param {string|undefined} securityOrigin
 162      */
 163     _removeSecurityOrigin: function(securityOrigin)
 164     {
 165         if (typeof securityOrigin === "undefined")
 166             return;
 167         if (this._securityOriginFrameCount[securityOrigin] === 1) {
 168             delete this._securityOriginFrameCount[securityOrigin];
 169             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.SecurityOriginRemoved, securityOrigin);
 170             return;
 171         }
 172         this._securityOriginFrameCount[securityOrigin] -= 1;
 173     },
 174
 175     /**
 176      * @return {!Array.<string>}
 177      */
 178     securityOrigins: function()
 179     {
 180         return Object.keys(this._securityOriginFrameCount);
 181     },
 182
 183     /**
 184      * @param {!WebInspector.ResourceTreeFrame} mainFrame
 185      */
 186     _handleMainFrameDetached: function(mainFrame)
 187     {
 188         /**
 189          * @param {!WebInspector.ResourceTreeFrame} frame
 190          * @this {WebInspector.ResourceTreeModel}
 191          */
 192         function removeOriginForFrame(frame)
 193         {
 194             for (var i = 0; i < frame.childFrames.length; ++i)
 195                 removeOriginForFrame.call(this, frame.childFrames[i]);
 196             if (!frame.isMainFrame())
 197                 this._removeSecurityOrigin(frame.securityOrigin);
 198         }
 199         removeOriginForFrame.call(this, WebInspector.resourceTreeModel.mainFrame);
 200     },
 201
 202     /**
 203      * @param {!PageAgent.FrameId} frameId
 204      * @param {?PageAgent.FrameId} parentFrameId
 205      * @return {?WebInspector.ResourceTreeFrame}
 206      */
 207     _frameAttached: function(frameId, parentFrameId)
 208     {
 209         // Do nothing unless cached resource tree is processed - it will overwrite everything.
 210         if (!this._cachedResourcesProcessed)
 211             return null;
 212         if (this._frames[frameId])
 213             return null;
 214
 215         var parentFrame = parentFrameId ? this._frames[parentFrameId] : null;
 216         var frame = new WebInspector.ResourceTreeFrame(this, parentFrame, frameId);
 217         if (frame.isMainFrame() && this.mainFrame) {
 218             this._handleMainFrameDetached(this.mainFrame);
 219             // Navigation to the new backend process.
 220             this._frameDetached(this.mainFrame.id);
 221         }
 222         this._addFrame(frame, true);
 223         return frame;
 224     },
 225
 226     /**
 227      * @param {!PageAgent.Frame} framePayload
 228      */
 229     _frameNavigated: function(framePayload)
 230     {
 231         // Do nothing unless cached resource tree is processed - it will overwrite everything.
 232         if (!this._cachedResourcesProcessed)
 233             return;
 234         var frame = this._frames[framePayload.id];
 235         if (!frame) {
 236             // Simulate missed "frameAttached" for a main frame navigation to the new backend process.
 237             console.assert(!framePayload.parentId, "Main frame shouldn't have parent frame id.");
 238             frame = this._frameAttached(framePayload.id, framePayload.parentId || "");
 239             console.assert(frame);
 240         }
 241         this._removeSecurityOrigin(frame.securityOrigin);
 242         frame._navigate(framePayload);
 243         var addedOrigin = frame.securityOrigin;
 244
 245         if (frame.isMainFrame())
 246             this._inspectedPageURL = frame.url;
 247
 248         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameNavigated, frame);
 249         if (frame.isMainFrame()) {
 250             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.MainFrameNavigated, frame);
 251             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.MainFrameCreatedOrNavigated, frame);
 252         }
 253         if (addedOrigin)
 254             this._addSecurityOrigin(addedOrigin);
 255
 256         // Fill frame with retained resources (the ones loaded using new loader).
 257         var resources = frame.resources();
 258         for (var i = 0; i < resources.length; ++i)
 259             this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ResourceAdded, resources[i]);
 260
 261         if (frame.isMainFrame())
 262             this._dispatchInspectedURLChanged();
 263     },
 264
 265     /**
 266      * @param {!PageAgent.FrameId} frameId
 267      */
 268     _frameDetached: function(frameId)
 269     {
 270         // Do nothing unless cached resource tree is processed - it will overwrite everything.
 271         if (!this._cachedResourcesProcessed)
 272             return;
 273
 274         var frame = this._frames[frameId];
 275         if (!frame)
 276             return;
 277
 278         this._removeSecurityOrigin(frame.securityOrigin);
 279         if (frame.parentFrame)
 280             frame.parentFrame._removeChildFrame(frame);
 281         else
 282             frame._remove();
 283     },
 284
 285     /**
 286      * @param {!WebInspector.Event} event
 287      */
 288     _onRequestFinished: function(event)
 289     {
 290         if (!this._cachedResourcesProcessed)
 291             return;
 292
 293         var request = /** @type {!WebInspector.NetworkRequest} */ (event.data);
 294         if (request.failed || request.type === WebInspector.resourceTypes.XHR)
 295             return;
 296
 297         var frame = this._frames[request.frameId];
 298         if (frame) {
 299             var resource = frame._addRequest(request);
 300             this._addPendingConsoleMessagesToResource(resource);
 301         }
 302     },
 303
 304     /**
 305      * @param {!WebInspector.Event} event
 306      */
 307     _onRequestUpdateDropped: function(event)
 308     {
 309         if (!this._cachedResourcesProcessed)
 310             return;
 311
 312         var frameId = event.data.frameId;
 313         var frame = this._frames[frameId];
 314         if (!frame)
 315             return;
 316
 317         var url = event.data.url;
 318         if (frame._resourcesMap[url])
 319             return;
 320
 321         var resource = new WebInspector.Resource(null, url, frame.url, frameId, event.data.loaderId, WebInspector.resourceTypes[event.data.resourceType], event.data.mimeType);
 322         frame.addResource(resource);
 323     },
 324
 325     /**
 326      * @param {!PageAgent.FrameId} frameId
 327      * @return {!WebInspector.ResourceTreeFrame}
 328      */
 329     frameForId: function(frameId)
 330     {
 331         return this._frames[frameId];
 332     },
 333
 334     /**
 335      * @param {function(!WebInspector.Resource)} callback
 336      * @return {boolean}
 337      */
 338     forAllResources: function(callback)
 339     {
 340         if (this.mainFrame)
 341             return this.mainFrame._callForFrameResources(callback);
 342         return false;
 343     },
 344
 345     /**
 346      * @return {!Array.<!WebInspector.ResourceTreeFrame>}
 347      */
 348     frames: function()
 349     {
 350         return Object.values(this._frames);
 351     },
 352
 353     /**
 354      * @param {!WebInspector.Event} event
 355      */
 356     _consoleMessageAdded: function(event)
 357     {
 358         var msg = /** @type {!WebInspector.ConsoleMessage} */ (event.data);
 359         var resource = msg.url ? this.resourceForURL(msg.url) : null;
 360         if (resource)
 361             this._addConsoleMessageToResource(msg, resource);
 362         else
 363             this._addPendingConsoleMessage(msg);
 364     },
 365
 366     /**
 367      * @param {!WebInspector.ConsoleMessage} msg
 368      */
 369     _addPendingConsoleMessage: function(msg)
 370     {
 371         if (!msg.url)
 372             return;
 373         if (!this._pendingConsoleMessages[msg.url])
 374             this._pendingConsoleMessages[msg.url] = [];
 375         this._pendingConsoleMessages[msg.url].push(msg);
 376     },
 377
 378     /**
 379      * @param {!WebInspector.Resource} resource
 380      */
 381     _addPendingConsoleMessagesToResource: function(resource)
 382     {
 383         var messages = this._pendingConsoleMessages[resource.url];
 384         if (messages) {
 385             for (var i = 0; i < messages.length; i++)
 386                 this._addConsoleMessageToResource(messages[i], resource);
 387             delete this._pendingConsoleMessages[resource.url];
 388         }
 389     },
 390
 391     /**
 392      * @param {!WebInspector.ConsoleMessage} msg
 393      * @param {!WebInspector.Resource} resource
 394      */
 395     _addConsoleMessageToResource: function(msg, resource)
 396     {
 397         switch (msg.level) {
 398         case WebInspector.ConsoleMessage.MessageLevel.Warning:
 399             resource.warnings++;
 400             break;
 401         case WebInspector.ConsoleMessage.MessageLevel.Error:
 402             resource.errors++;
 403             break;
 404         }
 405         resource.addMessage(msg);
 406     },
 407
 408     _consoleCleared: function()
 409     {
 410         function callback(resource)
 411         {
 412             resource.clearErrorsAndWarnings();
 413         }
 414
 415         this._pendingConsoleMessages = {};
 416         this.forAllResources(callback);
 417     },
 418
 419     /**
 420      * @param {string} url
 421      * @return {?WebInspector.Resource}
 422      */
 423     resourceForURL: function(url)
 424     {
 425         // Workers call into this with no frames available.
 426         return this.mainFrame ? this.mainFrame.resourceForURL(url) : null;
 427     },
 428
 429     /**
 430      * @param {?WebInspector.ResourceTreeFrame} parentFrame
 431      * @param {!PageAgent.FrameResourceTree} frameTreePayload
 432      */
 433     _addFramesRecursively: function(parentFrame, frameTreePayload)
 434     {
 435         var framePayload = frameTreePayload.frame;
 436         var frame = new WebInspector.ResourceTreeFrame(this, parentFrame, framePayload.id, framePayload);
 437         this._addFrame(frame);
 438
 439         var frameResource = this._createResourceFromFramePayload(framePayload, framePayload.url, WebInspector.resourceTypes.Document, framePayload.mimeType);
 440         if (frame.isMainFrame())
 441             this._inspectedPageURL = frameResource.url;
 442         frame.addResource(frameResource);
 443
 444         for (var i = 0; frameTreePayload.childFrames && i < frameTreePayload.childFrames.length; ++i)
 445             this._addFramesRecursively(frame, frameTreePayload.childFrames[i]);
 446
 447         for (var i = 0; i < frameTreePayload.resources.length; ++i) {
 448             var subresource = frameTreePayload.resources[i];
 449             var resource = this._createResourceFromFramePayload(framePayload, subresource.url, WebInspector.resourceTypes[subresource.type], subresource.mimeType);
 450             frame.addResource(resource);
 451         }
 452     },
 453
 454     /**
 455      * @param {!PageAgent.Frame} frame
 456      * @param {string} url
 457      * @param {!WebInspector.ResourceType} type
 458      * @param {string} mimeType
 459      * @return {!WebInspector.Resource}
 460      */
 461     _createResourceFromFramePayload: function(frame, url, type, mimeType)
 462     {
 463         return new WebInspector.Resource(null, url, frame.url, frame.id, frame.loaderId, type, mimeType);
 464     },
 465
 466     /**
 467      * @param {boolean=} ignoreCache
 468      * @param {string=} scriptToEvaluateOnLoad
 469      * @param {string=} scriptPreprocessor
 470      */
 471     reloadPage: function(ignoreCache, scriptToEvaluateOnLoad, scriptPreprocessor)
 472     {
 473         this.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.WillReloadPage);
 474         this._agent.reload(ignoreCache, scriptToEvaluateOnLoad, scriptPreprocessor);
 475     },
 476
 477     __proto__: WebInspector.Object.prototype
 478 }
 479
 480 /**
 481  * @constructor
 482  * @param {!WebInspector.ResourceTreeModel} model
 483  * @param {?WebInspector.ResourceTreeFrame} parentFrame
 484  * @param {!PageAgent.FrameId} frameId
 485  * @param {!PageAgent.Frame=} payload
 486  */
 487 WebInspector.ResourceTreeFrame = function(model, parentFrame, frameId, payload)
 488 {
 489     this._model = model;
 490     this._parentFrame = parentFrame;
 491     this._id = frameId;
 492     this._url = "";
 493
 494     if (payload) {
 495         this._loaderId = payload.loaderId;
 496         this._name = payload.name;
 497         this._url = payload.url;
 498         this._securityOrigin = payload.securityOrigin;
 499         this._mimeType = payload.mimeType;
 500     }
 501
 502     /**
 503      * @type {!Array.<!WebInspector.ResourceTreeFrame>}
 504      */
 505     this._childFrames = [];
 506
 507     /**
 508      * @type {!Object.<string, !WebInspector.Resource>}
 509      */
 510     this._resourcesMap = {};
 511
 512     if (this._parentFrame)
 513         this._parentFrame._childFrames.push(this);
 514 }
 515
 516 WebInspector.ResourceTreeFrame.prototype = {
 517     /**
 518      * @return {string}
 519      */
 520     get id()
 521     {
 522         return this._id;
 523     },
 524
 525     /**
 526      * @return {string}
 527      */
 528     get name()
 529     {
 530         return this._name || "";
 531     },
 532
 533     /**
 534      * @return {string}
 535      */
 536     get url()
 537     {
 538         return this._url;
 539     },
 540
 541     /**
 542      * @return {string}
 543      */
 544     get securityOrigin()
 545     {
 546         return this._securityOrigin;
 547     },
 548
 549     /**
 550      * @return {string}
 551      */
 552     get loaderId()
 553     {
 554         return this._loaderId;
 555     },
 556
 557     /**
 558      * @return {?WebInspector.ResourceTreeFrame}
 559      */
 560     get parentFrame()
 561     {
 562         return this._parentFrame;
 563     },
 564
 565     /**
 566      * @return {!Array.<!WebInspector.ResourceTreeFrame>}
 567      */
 568     get childFrames()
 569     {
 570         return this._childFrames;
 571     },
 572
 573     /**
 574      * @return {boolean}
 575      */
 576     isMainFrame: function()
 577     {
 578         return !this._parentFrame;
 579     },
 580
 581     /**
 582      * @param {!PageAgent.Frame} framePayload
 583      */
 584     _navigate: function(framePayload)
 585     {
 586         this._loaderId = framePayload.loaderId;
 587         this._name = framePayload.name;
 588         this._url = framePayload.url;
 589         this._securityOrigin = framePayload.securityOrigin;
 590         this._mimeType = framePayload.mimeType;
 591
 592         var mainResource = this._resourcesMap[this._url];
 593         this._resourcesMap = {};
 594         this._removeChildFrames();
 595         if (mainResource && mainResource.loaderId === this._loaderId)
 596             this.addResource(mainResource);
 597     },
 598
 599     /**
 600      * @return {!WebInspector.Resource}
 601      */
 602     get mainResource()
 603     {
 604         return this._resourcesMap[this._url];
 605     },
 606
 607     /**
 608      * @param {!WebInspector.ResourceTreeFrame} frame
 609      */
 610     _removeChildFrame: function(frame)
 611     {
 612         this._childFrames.remove(frame);
 613         frame._remove();
 614     },
 615
 616     _removeChildFrames: function()
 617     {
 618         var frames = this._childFrames;
 619         this._childFrames = [];
 620         for (var i = 0; i < frames.length; ++i)
 621             frames[i]._remove();
 622     },
 623
 624     _remove: function()
 625     {
 626         this._removeChildFrames();
 627         delete this._model._frames[this.id];
 628         this._model.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameDetached, this);
 629     },
 630
 631     /**
 632      * @param {!WebInspector.Resource} resource
 633      */
 634     addResource: function(resource)
 635     {
 636         if (this._resourcesMap[resource.url] === resource) {
 637             // Already in the tree, we just got an extra update.
 638             return;
 639         }
 640         this._resourcesMap[resource.url] = resource;
 641         this._model.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ResourceAdded, resource);
 642     },
 643
 644     /**
 645      * @param {!WebInspector.NetworkRequest} request
 646      * @return {!WebInspector.Resource}
 647      */
 648     _addRequest: function(request)
 649     {
 650         var resource = this._resourcesMap[request.url];
 651         if (resource && resource.request === request) {
 652             // Already in the tree, we just got an extra update.
 653             return resource;
 654         }
 655         resource = new WebInspector.Resource(request, request.url, request.documentURL, request.frameId, request.loaderId, request.type, request.mimeType);
 656         this._resourcesMap[resource.url] = resource;
 657         this._model.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ResourceAdded, resource);
 658         return resource;
 659     },
 660
 661     /**
 662      * @return {!Array.<!WebInspector.Resource>}
 663      */
 664     resources: function()
 665     {
 666         var result = [];
 667         for (var url in this._resourcesMap)
 668             result.push(this._resourcesMap[url]);
 669         return result;
 670     },
 671
 672     /**
 673      * @param {string} url
 674      * @return {?WebInspector.Resource}
 675      */
 676     resourceForURL: function(url)
 677     {
 678         var result;
 679         function filter(resource)
 680         {
 681             if (resource.url === url) {
 682                 result = resource;
 683                 return true;
 684             }
 685         }
 686         this._callForFrameResources(filter);
 687         return result || null;
 688     },
 689
 690     /**
 691      * @param {function(!WebInspector.Resource)} callback
 692      * @return {boolean}
 693      */
 694     _callForFrameResources: function(callback)
 695     {
 696         for (var url in this._resourcesMap) {
 697             if (callback(this._resourcesMap[url]))
 698                 return true;
 699         }
 700
 701         for (var i = 0; i < this._childFrames.length; ++i) {
 702             if (this._childFrames[i]._callForFrameResources(callback))
 703                 return true;
 704         }
 705         return false;
 706     },
 707
 708     /**
 709      * @return {string}
 710      */
 711     displayName: function()
 712     {
 713         if (!this._parentFrame)
 714             return WebInspector.UIString("<top frame>");
 715         var subtitle = new WebInspector.ParsedURL(this._url).displayName;
 716         if (subtitle) {
 717             if (!this._name)
 718                 return subtitle;
 719             return this._name + "( " + subtitle + " )";
 720         }
 721         return WebInspector.UIString("<iframe>");
 722     }
 723 }
 724
 725 /**
 726  * @constructor
 727  * @implements {PageAgent.Dispatcher}
 728  */
 729 WebInspector.PageDispatcher = function(resourceTreeModel)
 730 {
 731     this._resourceTreeModel = resourceTreeModel;
 732 }
 733
 734 WebInspector.PageDispatcher.prototype = {
 735     domContentEventFired: function(time)
 736     {
 737         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.DOMContentLoaded, time);
 738     },
 739
 740     loadEventFired: function(time)
 741     {
 742         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.Load, time);
 743     },
 744
 745     frameAttached: function(frameId, parentFrameId)
 746     {
 747         this._resourceTreeModel._frameAttached(frameId, parentFrameId);
 748     },
 749
 750     frameNavigated: function(frame)
 751     {
 752         this._resourceTreeModel._frameNavigated(frame);
 753     },
 754
 755     frameDetached: function(frameId)
 756     {
 757         this._resourceTreeModel._frameDetached(frameId);
 758     },
 759
 760     frameStartedLoading: function(frameId)
 761     {
 762     },
 763
 764     frameStoppedLoading: function(frameId)
 765     {
 766     },
 767
 768     frameScheduledNavigation: function(frameId, delay)
 769     {
 770     },
 771
 772     frameClearedScheduledNavigation: function(frameId)
 773     {
 774     },
 775
 776     frameResized: function()
 777     {
 778         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.FrameResized, null);
 779     },
 780
 781     javascriptDialogOpening: function(message)
 782     {
 783     },
 784
 785     javascriptDialogClosed: function()
 786     {
 787     },
 788
 789     scriptsEnabled: function(isEnabled)
 790     {
 791         WebInspector.settings.javaScriptDisabled.set(!isEnabled);
 792     },
 793
 794     /**
 795      * @param {string} data
 796      * @param {!PageAgent.ScreencastFrameMetadata=} metadata
 797      */
 798     screencastFrame: function(data, metadata)
 799     {
 800         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ScreencastFrame, {data:data, metadata:metadata});
 801     },
 802
 803     /**
 804      * @param {boolean} visible
 805      */
 806     screencastVisibilityChanged: function(visible)
 807     {
 808         this._resourceTreeModel.dispatchEventToListeners(WebInspector.ResourceTreeModel.EventTypes.ScreencastVisibilityChanged, {visible:visible});
 809     }
 810 }
 811
 812 /**
 813  * @type {!WebInspector.ResourceTreeModel}
 814  */
 815 WebInspector.resourceTreeModel;