src/third_party/WebKit/Source/devtools/front_end/components/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      * @param {!WebInspector.Target} target
  28      */
  29     targetAdded: function(target)
  30     {
  31         var option = this._selectElement.createChild("option");
  32         option.text = target.name();
  33         option.__target = target;
  34         this._targetToOption.put(target, option);
  35         if (WebInspector.context.flavor(WebInspector.Target) === target)
  36             this._selectElement.selectedIndex = Array.prototype.indexOf.call(/** @type {?} */ (this._selectElement), option);
  37
  38         this._updateVisibility();
  39     },
  40
  41     /**
  42      * @param {!WebInspector.Target} target
  43      */
  44     targetRemoved: function(target)
  45     {
  46         var option = this._targetToOption.remove(target);
  47         this._selectElement.removeChild(option);
  48         this._updateVisibility();
  49     },
  50
  51     _onComboBoxSelectionChange: function()
  52     {
  53         var selectedOption = this._selectElement[this._selectElement.selectedIndex];
  54         if (!selectedOption)
  55             return;
  56
  57         WebInspector.context.setFlavor(WebInspector.Target, selectedOption.__target);
  58     },
  59
  60     _updateVisibility: function()
  61     {
  62         var hidden = this._selectElement.childElementCount === 1;
  63         this._elementToHide.classList.toggle("hidden", hidden);
  64     },
  65
  66     /**
  67      * @param {!WebInspector.Event} event
  68      */
  69     _targetChangedExternally: function(event)
  70     {
  71         var target = /** @type {?WebInspector.Target} */ (event.data);
  72         if (target) {
  73             var option = /** @type {!Element} */ (this._targetToOption.get(target));
  74             this._select(option);
  75         }
  76     },
  77
  78     /**
  79      * @param {!Element} option
  80      */
  81     _select: function(option)
  82     {
  83         this._selectElement.selectedIndex = Array.prototype.indexOf.call(/** @type {?} */ (this._selectElement), option);
  84     }
  85
  86 }