[DevTools] Typed events and event listeners.

third_party/WebKit/Source/devtools/front_end/sources/NavigatorView.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 44 matching lines @@
 
     this._navigatorGroupByFolderSetting = Common.moduleSetting('navigatorGroupByFolder');
     this._navigatorGroupByFolderSetting.addChangeListener(this._groupingChanged.bind(this));
 
     this._initGrouping();
     SDK.targetManager.addModelListener(
         SDK.ResourceTreeModel, SDK.ResourceTreeModel.Events.FrameNavigated, this._frameNavigated, this);
     SDK.targetManager.addModelListener(
         SDK.ResourceTreeModel, SDK.ResourceTreeModel.Events.FrameDetached, this._frameDetached, this);
 
-    if (Runtime.experiments.isEnabled('persistence2')) {
-      Persistence.persistence.addEventListener(
-          Persistence.Persistence.Events.BindingCreated, this._onBindingChanged, this);
-      Persistence.persistence.addEventListener(
-          Persistence.Persistence.Events.BindingRemoved, this._onBindingChanged, this);
-    } else {
-      Persistence.persistence.addEventListener(
-          Persistence.Persistence.Events.BindingCreated, this._onBindingCreated, this);
-      Persistence.persistence.addEventListener(
-          Persistence.Persistence.Events.BindingRemoved, this._onBindingRemoved, this);
-    }
+    Persistence.persistence.addEventListener(Persistence.Persistence.BindingChangedEvent, this._onBindingChanged, this);
     SDK.targetManager.addEventListener(SDK.TargetManager.Events.NameChanged, this._targetNameChanged, this);
 
     SDK.targetManager.observeTargets(this);
     this._resetWorkspace(Workspace.workspace);
     this._workspace.uiSourceCodes().forEach(this._addUISourceCode.bind(this));
   }
 
   /**
    * @param {!TreeElement} treeElement
    */
@@ skipping 73 matching lines @@
 
     var result;
     if (typeWeight1 > typeWeight2)
       return 1;
     if (typeWeight1 < typeWeight2)
       return -1;
     return treeElement1.titleAsText().compareTo(treeElement2.titleAsText());
   }
 
   /**
-   * @param {!Common.Event} event
-   */
-  _onBindingCreated(event) {
-    var binding = /** @type {!Persistence.PersistenceBinding} */ (event.data);
-    this._removeUISourceCode(binding.network);
-  }
-
-  /**
-   * @param {!Common.Event} event
-   */
-  _onBindingRemoved(event) {
-    var binding = /** @type {!Persistence.PersistenceBinding} */ (event.data);
-    this._addUISourceCode(binding.network);
-  }
-
-  /**
-   * @param {!Common.Event} event
+   * @param {!Persistence.Persistence.BindingChangedEvent} event
    */
   _onBindingChanged(event) {
-    var binding = /** @type {!Persistence.PersistenceBinding} */ (event.data);
+    if (!Runtime.experiments.isEnabled('persistence2')) {
+      if (event.created)
+        this._removeUISourceCode(event.binding.network);
+      else
+        this._addUISourceCode(event.binding.network);
+      return;
+    }
 
     // Update UISourceCode titles.
-    var networkNode = this._uiSourceCodeNodes.get(binding.network);
+    var networkNode = this._uiSourceCodeNodes.get(event.binding.network);
     if (networkNode)
       networkNode.updateTitle();
-    var fileSystemNode = this._uiSourceCodeNodes.get(binding.fileSystem);
+    var fileSystemNode = this._uiSourceCodeNodes.get(event.binding.fileSystem);
     if (fileSystemNode)
       fileSystemNode.updateTitle();
 
     // Update folder titles.
-    var pathTokens = Persistence.FileSystemWorkspaceBinding.relativePath(binding.fileSystem);
+    var pathTokens = Persistence.FileSystemWorkspaceBinding.relativePath(event.binding.fileSystem);
     var folderPath = '';
     for (var i = 0; i < pathTokens.length - 1; ++i) {
       folderPath += pathTokens[i];
-      var folderId =
-          this._folderNodeId(binding.fileSystem.project(), null, null, binding.fileSystem.origin(), folderPath);
+      var folderId = this._folderNodeId(
+          event.binding.fileSystem.project(), null, null, event.binding.fileSystem.origin(), folderPath);
       var folderNode = this._subfolderNodes.get(folderId);
       if (folderNode)
         folderNode.updateTitle();
       folderPath += '/';
     }
 
     // Update fileSystem root title.
-    var fileSystemRoot = this._rootNode.child(binding.fileSystem.project().id());
+    var fileSystemRoot = this._rootNode.child(event.binding.fileSystem.project().id());
     if (fileSystemRoot)
       fileSystemRoot.updateTitle();
   }
 
   /**
    * @override
    */
   focus() {
     this._scriptsTree.focus();
   }
@@ skipping 1371 matching lines @@
   /**
    * @param {string} title
    * @override
    */
   setTitle(title) {
     this._title = title;
     if (this._treeElement)
       this._treeElement.title = this._title;
   }
 };