third_party/WebKit/Source/devtools/front_end/profiler/TargetsComboBoxController.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @constructor
   7  * @implements {WebInspector.TargetManager.Observer}
   8  * @param {!Element} selectElement
   9  * @param {!Element} elementToHide
  10  */
  11 WebInspector.TargetsComboBoxController = function(selectElement, elementToHide)
  12 {
  13     elementToHide.classList.add("hidden");
  14     selectElement.addEventListener("change", this._onComboBoxSelectionChange.bind(this), false);
  15     this._selectElement = selectElement;
  16     this._elementToHide = elementToHide;
  17     /** @type {!Map.<!WebInspector.Target, !Element>} */
  18     this._targetToOption = new Map();
  19
  20     WebInspector.context.addFlavorChangeListener(WebInspector.Target, this._targetChangedExternally, this);
  21     WebInspector.targetManager.observeTargets(this);
  22 }
  23
  24 WebInspector.TargetsComboBoxController.prototype = {
  25
  26     /**
  27      * @override
  28      * @param {!WebInspector.Target} target
  29      */
  30     targetAdded: function(target)
  31     {
  32         if (!target.hasJSContext())
  33             return;
  34         var option = this._selectElement.createChild("option");
  35         option.text = target.name();
  36         option.__target = target;
  37         this._targetToOption.set(target, option);
  38         if (WebInspector.context.flavor(WebInspector.Target) === target)
  39             this._selectElement.selectedIndex = Array.prototype.indexOf.call(/** @type {?} */ (this._selectElement), option);
  40
  41         this._updateVisibility();
  42     },
  43
  44     /**
  45      * @override
  46      * @param {!WebInspector.Target} target
  47      */
  48     targetRemoved: function(target)
  49     {
  50         if (!target.hasJSContext())
  51             return;
  52         var option = this._targetToOption.remove(target);
  53         this._selectElement.removeChild(option);
  54         this._updateVisibility();
  55     },
  56
  57     _onComboBoxSelectionChange: function()
  58     {
  59         var selectedOption = this._selectElement[this._selectElement.selectedIndex];
  60         if (!selectedOption)
  61             return;
  62
  63         WebInspector.context.setFlavor(WebInspector.Target, selectedOption.__target);
  64     },
  65
  66     _updateVisibility: function()
  67     {
  68         var hidden = this._selectElement.childElementCount === 1;
  69         this._elementToHide.classList.toggle("hidden", hidden);
  70     },
  71
  72     /**
  73      * @param {!WebInspector.Event} event
  74      */
  75     _targetChangedExternally: function(event)
  76     {
  77         var target = /** @type {?WebInspector.Target} */ (event.data);
  78         if (target) {
  79             var option = /** @type {!Element} */ (this._targetToOption.get(target));
  80             this._select(option);
  81         }
  82     },
  83
  84     /**
  85      * @param {!Element} option
  86      */
  87     _select: function(option)
  88     {
  89         this._selectElement.selectedIndex = Array.prototype.indexOf.call(/** @type {?} */ (this._selectElement), option);
  90     }
  91
  92 }