[DevTools] Properly update resizer in SourcesPanel.

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

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 155 matching lines @@
     paused: function()
     {
         return this._paused;
     },
 
     wasShown: function()
     {
         WebInspector.context.setFlavor(WebInspector.SourcesPanel, this);
         WebInspector.Panel.prototype.wasShown.call(this);
         var wrapper = WebInspector.SourcesPanel.WrapperView._instance;
-        if (wrapper && wrapper.isShowing())
+        if (wrapper && wrapper.isShowing()) {
             WebInspector.inspectorView.setDrawerMinimized(true);
+            WebInspector.SourcesPanel.updateResizer(this);
+        }
         this.editorView.setMainWidget(this._sourcesView);
     },
 
     willHide: function()
     {
         WebInspector.Panel.prototype.willHide.call(this);
         WebInspector.context.setFlavor(WebInspector.SourcesPanel, null);
-        if (WebInspector.SourcesPanel.WrapperView._instance && WebInspector.SourcesPanel.WrapperView._instance.isShowing()) {
+        if (WebInspector.SourcesPanel.WrapperView.isShowing()) {
             WebInspector.SourcesPanel.WrapperView._instance._showViewInWrapper();
             WebInspector.inspectorView.setDrawerMinimized(false);
+            WebInspector.SourcesPanel.updateResizer(this);
         }
     },
 
     /**
      * @return {boolean}
      */
     _ensureSourcesViewVisible: function()
     {
-        if (WebInspector.SourcesPanel.WrapperView._instance && WebInspector.SourcesPanel.WrapperView._instance.isShowing())
+        if (WebInspector.SourcesPanel.WrapperView.isShowing())
             return true;
         return this === WebInspector.inspectorView.setCurrentPanel(this);
     },
 
     onResize: function()
     {
         if (WebInspector.moduleSetting("sidebarPosition").get() === "auto")
             this.element.window().requestAnimationFrame(this._updateSidebarPosition.bind(this));  // Do not force layout.
     },
 
@@ skipping 881 matching lines @@
 
         if (this.sidebarPaneView && this.sidebarPaneView.shouldHideOnDetach())
             return; // We can't reparent extension iframes.
 
         if (this.sidebarPaneView)
             this.sidebarPaneView.detach();
 
         this._splitWidget.setVertical(!vertically);
         this._splitWidget.element.classList.toggle("sources-split-view-vertical", vertically);
 
-        if (!vertically)
-            this._splitWidget.uninstallResizer(this._sourcesView.toolbarContainerElement());
-        else
-            this._splitWidget.installResizer(this._sourcesView.toolbarContainerElement());
+        WebInspector.SourcesPanel.updateResizer(this);
 
         // Create vertical box with stack.
         var vbox = new WebInspector.VBox();
         vbox.element.appendChild(this._debugToolbarDrawer);
         vbox.setMinimumAndPreferredSizes(25, 25, WebInspector.SourcesPanel.minToolbarWidth, 100);
         var sidebarPaneStack = new WebInspector.SidebarPaneStack();
         sidebarPaneStack.element.classList.add("flex-auto");
         sidebarPaneStack.show(vbox.element);
         vbox.element.appendChild(this._debugToolbar.element);
 
@@ skipping 284 matching lines @@
  * @return {!WebInspector.SourcesPanel}
  */
 WebInspector.SourcesPanel.instance = function()
 {
     if (!WebInspector.SourcesPanel._instanceObject)
         WebInspector.SourcesPanel._instanceObject = new WebInspector.SourcesPanel();
     return WebInspector.SourcesPanel._instanceObject;
 }
 
 /**
+ * @param {!WebInspector.SourcesPanel} panel
+ */
+WebInspector.SourcesPanel.updateResizer = function(panel)
+{
+    if (panel._splitWidget.isVertical() || (WebInspector.SourcesPanel.WrapperView.isShowing() && !WebInspector.inspectorView.isDrawerMinimized()))
+        panel._splitWidget.uninstallResizer(panel._sourcesView.toolbarContainerElement());
+    else
+        panel._splitWidget.installResizer(panel._sourcesView.toolbarContainerElement());
+}
+
+/**
  * @constructor
  * @implements {WebInspector.PanelFactory}
  */
 WebInspector.SourcesPanelFactory = function()
 {
 }
 
 WebInspector.SourcesPanelFactory.prototype = {
     /**
      * @override
@@ skipping 17 matching lines @@
     this._view = WebInspector.SourcesPanel.instance()._sourcesView;
 }
 
 WebInspector.SourcesPanel.WrapperView.prototype = {
     wasShown: function()
     {
         if (WebInspector.inspectorView.currentPanel() && WebInspector.inspectorView.currentPanel().name !== "sources")
             this._showViewInWrapper();
         else
             WebInspector.inspectorView.setDrawerMinimized(true);
+        WebInspector.SourcesPanel.updateResizer(WebInspector.SourcesPanel.instance());
     },
 
     willHide: function()
     {
         WebInspector.inspectorView.setDrawerMinimized(false);
+        setImmediate(() => WebInspector.SourcesPanel.updateResizer(WebInspector.SourcesPanel.instance()));
     },
 
     /**
      * @override
      * @return {!Element}
      */
     defaultFocusedElement: function()
     {
         return this._view.defaultFocusedElement();
     },
 
     focus: function()
     {
         this._view.focus();
     },
 
     _showViewInWrapper: function()
     {
         this._view.show(this.element);
     },
 
     __proto__: WebInspector.VBox.prototype
 }
+
+/**
+ * @return {boolean}
+ */
+WebInspector.SourcesPanel.WrapperView.isShowing = function()
+{
+    return !!WebInspector.SourcesPanel.WrapperView._instance && WebInspector.SourcesPanel.WrapperView._instance.isShowing();
+}