DevTools: [Persistence] implement Persistence.subscribeForBindingEvents

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @implements {Sources.TabbedEditorContainerDelegate}
  * @implements {UI.Searchable}
  * @implements {UI.Replaceable}
  * @unrestricted
  */
 Sources.SourcesView = class extends UI.VBox {
@@ skipping 71 matching lines @@
       UI.viewManager.showView('sources');
       for (var i = 0; i < unsavedSourceCodes.length; ++i)
         Common.Revealer.reveal(unsavedSourceCodes[i]);
     }
 
     if (!window.opener)
       window.addEventListener('beforeunload', handleBeforeUnload, true);
 
     this._shortcuts = {};
     this.element.addEventListener('keydown', this._handleKeyDown.bind(this), false);
-
-    Persistence.persistence.addEventListener(
-        Persistence.Persistence.Events.BindingCreated, this._onBindingChanged, this);
-    Persistence.persistence.addEventListener(
-        Persistence.Persistence.Events.BindingRemoved, this._onBindingChanged, this);
   }
 
   /**
    * @param {function(!Array.<!UI.KeyboardShortcut.Descriptor>, function(!Event=):boolean)} registerShortcutDelegate
    */
   registerShortcuts(registerShortcutDelegate) {
     /**
      * @this {Sources.SourcesView}
      * @param {!Array.<!UI.KeyboardShortcut.Descriptor>} shortcuts
      * @param {function(!Event=):boolean} handler
@@ skipping 285 matching lines @@
    * @param {!Workspace.UISourceCode} uiSourceCode
    */
   _removeSourceFrame(uiSourceCode) {
     var sourceView = this._sourceViewByUISourceCode.get(uiSourceCode);
     this._sourceViewByUISourceCode.remove(uiSourceCode);
     uiSourceCode.removeEventListener(Workspace.UISourceCode.Events.TitleChanged, this._uiSourceCodeTitleChanged, this);
     if (sourceView && sourceView instanceof Sources.UISourceCodeFrame)
       /** @type {!Sources.UISourceCodeFrame} */ (sourceView).dispose();
   }
 
-  /**
-   * @param {!Common.Event} event
-   */
-  _onBindingChanged(event) {
-    if (!this._executionLocation)
-      return;
-    var binding = /** @type {!Persistence.PersistenceBinding} */ (event.data);
-    var uiSourceCode = this._executionLocation.uiSourceCode;
-    if (binding.network !== uiSourceCode)
-      return;
+  _onBindingChanged() {
     this.setExecutionLocation(this._executionLocation);
     this.showSourceLocation(
         this._executionLocation.uiSourceCode, this._executionLocation.lineNumber, this._executionLocation.columnNumber);
   }
 
   clearCurrentExecutionLine() {
-    if (this._executionSourceFrame)
-      this._executionSourceFrame.clearExecutionLine();
+    if (!this._executionLocation)
+      return;
+    Persistence.persistence.unsubscribeFromBindingEvent(
+        this._executionLocation.uiSourceCode, this._onBindingChanged);
+    this._executionSourceFrame.clearExecutionLine();
     this._executionSourceFrame = null;
     this._executionLocation = null;
   }
 
   /**
    * @param {!Workspace.UILocation} uiLocation
    */
   setExecutionLocation(uiLocation) {
     this.clearCurrentExecutionLine();
     var binding = Persistence.persistence.binding(uiLocation.uiSourceCode);
     var uiSourceCode = binding ? binding.fileSystem : uiLocation.uiSourceCode;
     var sourceView = this._getOrCreateSourceView(uiSourceCode);
-    if (sourceView instanceof Sources.UISourceCodeFrame) {
-      var sourceFrame = /** @type {!Sources.UISourceCodeFrame} */ (sourceView);
-      sourceFrame.setExecutionLocation(
-          new Workspace.UILocation(uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber));
-      this._executionSourceFrame = sourceFrame;
-      this._executionLocation = uiLocation;
-    }
+    if (!(sourceView instanceof Sources.UISourceCodeFrame))
+      return;
+    Persistence.persistence.subscribeForBindingEvent(uiLocation.uiSourceCode, this._onBindingChanged, this);
+    var sourceFrame = /** @type {!Sources.UISourceCodeFrame} */ (sourceView);
+    sourceFrame.setExecutionLocation(
+        new Workspace.UILocation(uiSourceCode, uiLocation.lineNumber, uiLocation.columnNumber));
+    this._executionSourceFrame = sourceFrame;
+    this._executionLocation = uiLocation;
   }
 
   /**
    * @param {!Common.Event} event
    */
   _editorClosed(event) {
     var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data);
     this._historyManager.removeHistoryForSourceCode(uiSourceCode);
 
     var wasSelected = false;
@@ skipping 329 matching lines @@
    * @return {boolean}
    */
   handleAction(context, actionId) {
     var sourcesView = UI.context.flavor(Sources.SourcesView);
     if (!sourcesView)
       return false;
     sourcesView._editorContainer.closeAllFiles();
     return true;
   }
 };