Revert of DevTools: properly restore selected DOMNode in Elements panel.

third_party/WebKit/Source/devtools/front_end/elements/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 311 matching lines @@
      * @param {!WebInspector.Event} event
      */
     _selectedNodeChanged: function(event)
     {
         var selectedNode = /** @type {?WebInspector.DOMNode} */ (event.data);
         for (var i = 0; i < this._treeOutlines.length; ++i) {
             if (!selectedNode || selectedNode.domModel() !== this._treeOutlines[i].domModel())
                 this._treeOutlines[i].selectDOMNode(null);
         }
 
+        if (!selectedNode && this._lastValidSelectedNode)
+            this._selectedPathOnReset = this._lastValidSelectedNode.path();
+
         this._breadcrumbs.setSelectedNode(selectedNode);
 
         WebInspector.context.setFlavor(WebInspector.DOMNode, selectedNode);
 
         if (!selectedNode)
             return;
         selectedNode.setAsInspectedNode();
-        if (!this._isSettingDefaultSelectedNode) {
-            this._selectedNodeOnReset = selectedNode;
-            this._hasNonDefaultSelectedNode = true;
-        }
+        this._lastValidSelectedNode = selectedNode;
 
         var executionContexts = selectedNode.target().runtimeModel.executionContexts();
         var nodeFrameId = selectedNode.frameId();
         for (var context of executionContexts) {
             if (context.frameId === nodeFrameId) {
                 WebInspector.context.setFlavor(WebInspector.ExecutionContext, context);
                 break;
             }
         }
     },
@@ skipping 22 matching lines @@
 
         var treeOutline = WebInspector.ElementsTreeOutline.forDOMModel(domModel);
         treeOutline.rootDOMNode = inspectedRootDocument;
 
         if (!inspectedRootDocument) {
             if (this.isShowing())
                 domModel.requestDocument();
             return;
         }
 
-        this._hasNonDefaultSelectedNode = false;
         WebInspector.domBreakpointsSidebarPane.restoreBreakpoints(inspectedRootDocument);
 
+        /**
+         * @this {WebInspector.ElementsPanel}
+         * @param {?WebInspector.DOMNode} candidateFocusNode
+         */
+        function selectNode(candidateFocusNode)
+        {
+            if (!candidateFocusNode)
+                candidateFocusNode = inspectedRootDocument.body || inspectedRootDocument.documentElement;
+
+            if (!candidateFocusNode)
+                return;
+
+            if (!this._pendingNodeReveal) {
+                this.selectDOMNode(candidateFocusNode);
+                if (treeOutline.selectedTreeElement)
+                    treeOutline.selectedTreeElement.expand();
+            }
+        }
+
+        /**
+         * @param {?DOMAgent.NodeId} nodeId
+         * @this {WebInspector.ElementsPanel}
+         */
+        function selectLastSelectedNode(nodeId)
+        {
+            if (this.selectedDOMNode()) {
+                // Focused node has been explicitly set while reaching out for the last selected node.
+                return;
+            }
+            var node = nodeId ? domModel.nodeForId(nodeId) : null;
+            selectNode.call(this, node);
+            this._lastSelectedNodeSelectedForTest();
+        }
+
         if (this._omitDefaultSelection)
             return;
 
-        var savedSelectedNodeOnReset = this._selectedNodeOnReset;
-        restoreNode.call(this, domModel, this._selectedNodeOnReset);
-
-        /**
-         * @param {!WebInspector.DOMModel} domModel
-         * @param {?WebInspector.DOMNode} staleNode
-         * @this {WebInspector.ElementsPanel}
-         */
-        function restoreNode(domModel, staleNode)
-        {
-            var nodePath = staleNode ? staleNode.path() : null;
-            if (!nodePath) {
-                onNodeRestored.call(this, null);
-                return;
-            }
-            domModel.pushNodeByPathToFrontend(nodePath, onNodeRestored.bind(this));
-        }
-
-        /**
-         * @param {?DOMAgent.NodeId} restoredNodeId
-         * @this {WebInspector.ElementsPanel}
-         */
-        function onNodeRestored(restoredNodeId)
-        {
-            if (savedSelectedNodeOnReset !== this._selectedNodeOnReset)
-                return;
-            var node = restoredNodeId ? domModel.nodeForId(restoredNodeId) : null;
-            if (!node) {
-                var inspectedDocument = domModel.existingDocument();
-                node = inspectedDocument ? inspectedDocument.body || inspectedDocument.documentElement : null;
-            }
-            this._setDefaultSelectedNode(node);
-            this._lastSelectedNodeSelectedForTest();
-        }
+        if (this._selectedPathOnReset)
+            domModel.pushNodeByPathToFrontend(this._selectedPathOnReset, selectLastSelectedNode.bind(this));
+        else
+            selectNode.call(this, null);
+        delete this._selectedPathOnReset;
     },
 
     _lastSelectedNodeSelectedForTest: function() { },
 
     /**
-     * @param {?WebInspector.DOMNode} node
-     */
-    _setDefaultSelectedNode: function(node)
-    {
-        if (!node || this._hasNonDefaultSelectedNode || this._pendingNodeReveal)
-            return;
-        var treeOutline = WebInspector.ElementsTreeOutline.forDOMModel(node.domModel());
-        if (!treeOutline)
-            return;
-        this._isSettingDefaultSelectedNode = true;
-        this.selectDOMNode(node);
-        this._isSettingDefaultSelectedNode = false;
-        if (treeOutline.selectedTreeElement)
-            treeOutline.selectedTreeElement.expand();
-    },
-
-    /**
      * @override
      */
     searchCanceled: function()
     {
         delete this._searchQuery;
         this._hideSearchHighlights();
 
         this._searchableView.updateSearchMatchesCount(0);
 
         delete this._currentSearchResultIndex;
@@ skipping 268 matching lines @@
                 treeOutline.domModel().redo();
                 event.handled = true;
             }
         }
 
         if (WebInspector.isEditing() && event.keyCode !== WebInspector.KeyboardShortcut.Keys.F2.code)
             return;
 
         var treeOutline = null;
         for (var i = 0; i < this._treeOutlines.length; ++i) {
-            if (this._treeOutlines[i].selectedDOMNode())
+            if (this._treeOutlines[i].selectedDOMNode() === this._lastValidSelectedNode)
                 treeOutline = this._treeOutlines[i];
         }
         if (!treeOutline)
             return;
 
         if (!treeOutline.editing()) {
             handleUndoRedo.call(null, treeOutline);
             if (event.handled) {
                 this._stylesWidget.forceUpdate();
                 return;
@@ skipping 375 matching lines @@
     /**
      * @override
      * @param {!WebInspector.DOMNode} node
      * @return {?{title: string, color: string}}
      */
     decorate: function(node)
     {
         return { color: "orange", title: WebInspector.UIString("Element state: %s", ":" + WebInspector.CSSModel.fromNode(node).pseudoState(node).join(", :")) };
     }
 }