DevTools: Get rid of redundant default selection during inspectElement

Source/devtools/front_end/ElementsPanel.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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
@@ skipping 101 matching lines @@
     WebInspector.dockController.addEventListener(WebInspector.DockController.Events.DockSideChanged, this._dockSideChanged.bind(this));
     WebInspector.settings.splitVerticallyWhenDockedToRight.addChangeListener(this._dockSideChanged.bind(this));
     this._dockSideChanged();
 
     this._popoverHelper = new WebInspector.PopoverHelper(this.element, this._getPopoverAnchor.bind(this), this._showPopover.bind(this));
     this._popoverHelper.setTimeout(0);
 
     WebInspector.domAgent.addEventListener(WebInspector.DOMAgent.Events.DocumentUpdated, this._documentUpdatedEvent, this);
     WebInspector.settings.showShadowDOM.addChangeListener(this._showShadowDOMChanged.bind(this));
 
-    if (WebInspector.domAgent.existingDocument())
-        this._documentUpdated(WebInspector.domAgent.existingDocument());
-
     WebInspector.cssModel.addEventListener(WebInspector.CSSStyleModel.Events.ModelWasEnabled, this._updateSidebars, this);
 }
 
 WebInspector.ElementsPanel.prototype = {
     _updateTreeOutlineVisibleWidth: function()
     {
         if (!this.treeOutline)
             return;
 
         var width = this._splitView.element.offsetWidth;
@@ skipping 26 matching lines @@
         if (this.treeOutline.element.parentElement !== this.contentElement)
             this.contentElement.appendChild(this.treeOutline.element);
 
         WebInspector.Panel.prototype.wasShown.call(this);
 
         this.updateBreadcrumb();
         this.treeOutline.updateSelection();
         this.treeOutline.setVisible(true);
 
         if (!this.treeOutline.rootDOMNode)
-            WebInspector.domAgent.requestDocument();
+            if (WebInspector.domAgent.existingDocument())
+                this._documentUpdated(WebInspector.domAgent.existingDocument());
+            else
+                WebInspector.domAgent.requestDocument();
     },
 
     willHide: function()
     {
         WebInspector.domAgent.hideDOMNodeHighlight();
         this.treeOutline.setVisible(false);
         this._popoverHelper.hidePopover();
 
         // Detach heavy component on hide
         this.contentElement.removeChild(this.treeOutline.element);
 
         WebInspector.Panel.prototype.willHide.call(this);
     },
 
     onResize: function()
     {
         this._updateTreeOutlineVisibleWidth();
     },
 
+    omitDefaultSelection: function()
+    {
+        this._omitDefaultSelection = true;
+    },
+
+    stopOmittingDefaultSelection: function()
+    {
+        delete this._omitDefaultSelection;
+    },
+
     /**
      * @param {!DOMAgent.NodeId} nodeId
      * @param {string} pseudoClass
      * @param {boolean} enable
      */
     _setPseudoClassForNodeId: function(nodeId, pseudoClass, enable)
     {
         var node = WebInspector.domAgent.nodeForId(nodeId);
         if (!node)
             return;
@@ skipping 104 matching lines @@
         function selectLastSelectedNode(nodeId)
         {
             if (this.selectedDOMNode()) {
                 // Focused node has been explicitly set while reaching out for the last selected node.
                 return;
             }
             var node = nodeId ? WebInspector.domAgent.nodeForId(nodeId) : null;
             selectNode.call(this, node);
         }
 
+        if (this._omitDefaultSelection)
+            return;
+
         if (this._selectedPathOnReset)
             WebInspector.domAgent.pushNodeByPathToFrontend(this._selectedPathOnReset, selectLastSelectedNode.bind(this));
         else
             selectNode.call(this, null);
         delete this._selectedPathOnReset;
     },
 
     searchCanceled: function()
     {
         delete this._searchQuery;
@@ skipping 1019 matching lines @@
 {
 }
 
 WebInspector.ElementsPanel.DOMNodeRevealer.prototype = {
     /**
      * @param {!Object} node
      */
     reveal: function(node)
     {
         if (node instanceof WebInspector.DOMNode)
-            /** @type {!WebInspector.ElementsPanel} */ (WebInspector.showPanel("elements")).revealAndSelectNode(node.id);
+            /** @type {!WebInspector.ElementsPanel} */ (WebInspector.panel("elements")).revealAndSelectNode(node.id);
     }
 }