[DevTools] Remove HelpScreen, turn SettingsScreen into dialog and web component.

third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.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:
  *
@@ skipping 186 matching lines @@
 
 /**
  * @constructor
  * @param {!Document} document
  * @param {boolean=} dimmed
  */
 WebInspector.GlassPane = function(document, dimmed)
 {
     this.element = createElement("div");
     var background = dimmed ? "rgba(255, 255, 255, 0.5)" : "transparent";
-    this.element.style.cssText = "position:absolute;top:0;bottom:0;left:0;right:0;background-color:" + background + ";z-index:3000;overflow:hidden;";
+    var zIndex = (3 + WebInspector._glassPanes.length) * 1000;  // Deliberately starts with 3000 to hide other z-indexed elements below.
+    this.element.style.cssText = "position:absolute;top:0;bottom:0;left:0;right:0;background-color:" + background + ";z-index:" + zIndex + ";overflow:hidden;";
     document.body.appendChild(this.element);
-    WebInspector._glassPane = this;
+    WebInspector._glassPanes.push(this);
 }
 
 WebInspector.GlassPane.prototype = {
     dispose: function()
     {
-        delete WebInspector._glassPane;
+        console.assert(this === WebInspector._glassPanes.peekLast());
+        WebInspector._glassPanes.pop();
         if (WebInspector.GlassPane.DefaultFocusedViewStack.length)
             WebInspector.GlassPane.DefaultFocusedViewStack.peekLast().focus();
         this.element.remove();
     }
 }
 
+/** @type {!Array<!WebInspector.GlassPane>} */
+WebInspector._glassPanes = [];
+
 /**
  * @type {!Array.<!WebInspector.Widget|!WebInspector.Dialog>}
  */
 WebInspector.GlassPane.DefaultFocusedViewStack = [];
 
 /**
  * @param {?Node=} node
  * @return {boolean}
  */
 WebInspector.isBeingEdited = function(node)
@@ skipping 526 matching lines @@
         return true;
 
     return false;
 }
 
 /**
  * @param {?Node} x
  */
 WebInspector.setCurrentFocusElement = function(x)
 {
-    if (WebInspector._glassPane && x && !WebInspector._glassPane.element.isAncestor(x))
+    if (WebInspector._glassPanes.length && x && !WebInspector._glassPanes.peekLast().element.isAncestor(x))
         return;
     if (WebInspector._currentFocusElement !== x)
         WebInspector._previousFocusElement = WebInspector._currentFocusElement;
     WebInspector._currentFocusElement = x;
 
-    if (WebInspector._currentFocusElement) {
-        WebInspector._currentFocusElement.focus();
+    if (x) {
+        x.focus();
 
         // Make a caret selection inside the new element if there isn't a range selection and there isn't already a caret selection inside.
         // This is needed (at least) to remove caret from console when focus is moved to some element in the panel.
         // The code below should not be applied to text fields and text areas, hence _isTextEditingElement check.
         var selection = x.getComponentSelection();
-        if (!WebInspector._isTextEditingElement(WebInspector._currentFocusElement) && selection.isCollapsed && !WebInspector._currentFocusElement.isInsertionCaretInside()) {
-            var selectionRange = WebInspector._currentFocusElement.ownerDocument.createRange();
-            selectionRange.setStart(WebInspector._currentFocusElement, 0);
-            selectionRange.setEnd(WebInspector._currentFocusElement, 0);
+        if (!WebInspector._isTextEditingElement(x) && selection.isCollapsed && !x.isInsertionCaretInside()) {
+            var selectionRange = x.ownerDocument.createRange();
+            selectionRange.setStart(x, 0);
+            selectionRange.setEnd(x, 0);
 
             selection.removeAllRanges();
             selection.addRange(selectionRange);
         }
     } else if (WebInspector._previousFocusElement)
         WebInspector._previousFocusElement.blur();
 }
 
 WebInspector.restoreFocusFromElement = function(element)
 {
@@ skipping 678 matching lines @@
         // Due to the nature of regex, |items| array has matched elements on its even indexes.
         var items = text.replace(regex, "\0$1\0").split("\0");
         for (var i = 0; i < items.length; ++i) {
             var processedNode = i % 2 ? processor(items[i]) : this._runProcessor(processorIndex + 1, items[i]);
             container.appendChild(processedNode);
         }
 
         return container;
     }
 }