src/third_party/WebKit/Source/devtools/front_end/Dialog.js

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /**
  32  * @constructor
  33  * @param {Element} relativeToElement
  34  * @param {WebInspector.DialogDelegate} delegate
  35  */
  36 WebInspector.Dialog = function(relativeToElement, delegate)
  37 {
  38     this._delegate = delegate;
  39     this._relativeToElement = relativeToElement;
  40
  41     this._glassPane = new WebInspector.GlassPane();
  42     // Install glass pane capturing events.
  43     this._glassPane.element.tabIndex = 0;
  44     this._glassPane.element.addEventListener("focus", this._onGlassPaneFocus.bind(this), false);
  45
  46     this._element = this._glassPane.element.createChild("div");
  47     this._element.tabIndex = 0;
  48     this._element.addEventListener("focus", this._onFocus.bind(this), false);
  49     this._element.addEventListener("keydown", this._onKeyDown.bind(this), false);
  50     this._closeKeys = [
  51         WebInspector.KeyboardShortcut.Keys.Enter.code,
  52         WebInspector.KeyboardShortcut.Keys.Esc.code,
  53     ];
  54
  55     delegate.show(this._element);
  56
  57     this._position();
  58     this._windowResizeHandler = this._position.bind(this);
  59     window.addEventListener("resize", this._windowResizeHandler, true);
  60     this._delegate.focus();
  61 }
  62
  63 /**
  64  * @return {WebInspector.Dialog}
  65  */
  66 WebInspector.Dialog.currentInstance = function()
  67 {
  68     return WebInspector.Dialog._instance;
  69 }
  70
  71 /**
  72  * @param {Element} relativeToElement
  73  * @param {WebInspector.DialogDelegate} delegate
  74  */
  75 WebInspector.Dialog.show = function(relativeToElement, delegate)
  76 {
  77     if (WebInspector.Dialog._instance)
  78         return;
  79     WebInspector.Dialog._instance = new WebInspector.Dialog(relativeToElement, delegate);
  80 }
  81
  82 WebInspector.Dialog.hide = function()
  83 {
  84     if (!WebInspector.Dialog._instance)
  85         return;
  86     WebInspector.Dialog._instance._hide();
  87 }
  88
  89 WebInspector.Dialog.prototype = {
  90     _hide: function()
  91     {
  92         if (this._isHiding)
  93             return;
  94         this._isHiding = true;
  95
  96         this._delegate.willHide();
  97
  98         delete WebInspector.Dialog._instance;
  99         this._glassPane.dispose();
 100         window.removeEventListener("resize", this._windowResizeHandler, true);
 101     },
 102
 103     _onGlassPaneFocus: function(event)
 104     {
 105         this._hide();
 106     },
 107
 108     _onFocus: function(event)
 109     {
 110         this._delegate.focus();
 111     },
 112
 113     _position: function()
 114     {
 115         this._delegate.position(this._element, this._relativeToElement);
 116     },
 117
 118     _onKeyDown: function(event)
 119     {
 120         if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Tab.code) {
 121             event.preventDefault();
 122             return;
 123         }
 124
 125         if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Enter.code)
 126             this._delegate.onEnter();
 127
 128         if (this._closeKeys.indexOf(event.keyCode) >= 0) {
 129             this._hide();
 130             event.consume(true);
 131         }
 132     }
 133 };
 134
 135 /**
 136  * @constructor
 137  * @extends {WebInspector.Object}
 138  */
 139 WebInspector.DialogDelegate = function()
 140 {
 141 }
 142
 143 WebInspector.DialogDelegate.prototype = {
 144     /**
 145      * @param {Element} element
 146      */
 147     show: function(element)
 148     {
 149         element.appendChild(this.element);
 150         this.element.addStyleClass("dialog-contents");
 151         element.addStyleClass("dialog");
 152     },
 153
 154     /**
 155      * @param {Element} element
 156      * @param {Element} relativeToElement
 157      */
 158     position: function(element, relativeToElement)
 159     {
 160         var offset = relativeToElement.offsetRelativeToWindow(window);
 161
 162         var positionX = offset.x + (relativeToElement.offsetWidth - element.offsetWidth) / 2;
 163         positionX = Number.constrain(positionX, 0, window.innerWidth - element.offsetWidth);
 164
 165         var positionY = offset.y + (relativeToElement.offsetHeight - element.offsetHeight) / 2;
 166         positionY = Number.constrain(positionY, 0, window.innerHeight - element.offsetHeight);
 167
 168         element.style.left = positionX + "px";
 169         element.style.top = positionY + "px";
 170     },
 171
 172     focus: function() { },
 173
 174     onEnter: function() { },
 175
 176     willHide: function() { },
 177
 178     __proto__: WebInspector.Object.prototype
 179 }
 180