1/* 2 * Copyright (C) 2010 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 31WebInspector.HelpScreen = function(title) 32{ 33 this._element = document.createElement("div"); 34 this._element.className = "help-window-outer"; 35 this._element.addEventListener("keydown", this._onKeyDown.bind(this), false); 36 37 var mainWindow = this._element.createChild("div", "help-window-main"); 38 var captionWindow = mainWindow.createChild("div", "help-window-caption"); 39 var closeButton = captionWindow.createChild("button", "help-close-button"); 40 this.contentElement = mainWindow.createChild("div", "help-content"); 41 this.contentElement.tabIndex = 0; 42 this.contentElement.addEventListener("blur", this._onBlur.bind(this), false); 43 captionWindow.createChild("h1", "help-window-title").textContent = title; 44 45 closeButton.textContent = "\u2716"; // Code stands for HEAVY MULTIPLICATION X. 46 closeButton.addEventListener("click", this._hide.bind(this), false); 47 this._closeKeys = [ 48 WebInspector.KeyboardShortcut.Keys.Enter.code, 49 WebInspector.KeyboardShortcut.Keys.Esc.code, 50 WebInspector.KeyboardShortcut.Keys.Space.code, 51 ]; 52 document.body.appendChild(this._element); 53} 54 55WebInspector.HelpScreen.prototype = { 56 show: function() 57 { 58 if (this._isShown) 59 return; 60 61 this._element.style.visibility = "visible"; 62 this._isShown = true; 63 this._previousFocusElement = WebInspector.currentFocusElement; 64 WebInspector.currentFocusElement = this.contentElement; 65 }, 66 67 _hide: function() 68 { 69 this._isShown = false; 70 this._element.style.visibility = "hidden"; 71 WebInspector.currentFocusElement = this._previousFocusElement; 72 }, 73 74 _onKeyDown: function(event) 75 { 76 if (this._isShown && this._closeKeys.indexOf(event.keyCode) >= 0) { 77 this._hide(); 78 event.stopPropagation(); 79 } 80 }, 81 82 _onBlur: function() 83 { 84 // Pretend we're modal, grab focus back if we're still shown. 85 if (this._isShown) 86 WebInspector.currentFocusElement = this.contentElement; 87 } 88} 89