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'DOMNodeFocused' pseudo-event + Mutation Event Demo
author Fabien Cazenave <fabien@cazenave.cc>
date Mon, 19 Dec 2011 18:50:06 +0100
parents eb3679d92996
children
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683f56999fb3 'DOMNodeFocused' pseudo-event + Mutation Event Demo
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1 /** Copyright (c) 2010-2011 Fabien Cazenave and Sonny Piers.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
1
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21
2
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22 /**
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23 * File : barbecue.js
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24 * Author : Fabien Cazenave <fabien@cazenave.cc>
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25 * Version : 0.1
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26 * License : MIT
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27 * Last Modified : 2011-12-19
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28 */
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29
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30 /** wysiwyg Editor
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31 * expected compatibility: all browsers except IE<9.
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32 *
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33 * This HTML content editor is not intended to compete with CKEditor or
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34 * TinyMCE: it is designed to *test* the various implementations of
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35 * contentEditable and execCommand in modern browsers.
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36 *
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37 * Note: a specific micro-format is expected for the format toolbar.
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38 */
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39 !function(window, document, undefined) {
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40 var
2
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41 gActiveEditor = null, // active editing host
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42 gCommandDump = null; // command dump field (debug)
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43
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44 function ExecCommand(toolbarElement) {
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45 var argVal, argStr,
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46 type = toolbarElement.getAttribute("type"),
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47 command = toolbarElement.getAttribute("data-command");
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48
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49 // get the execCommand argument according to the button type
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50 switch (type) {
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51 case "button": // toolbar button: no argument
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52 argVal = argStr = false;
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53 break;
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54 case "checkbox": // styleWithCSS: boolean argument
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55 argVal = argStr = "" + toolbarElement.checked + "";
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56 break;
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57 default: // <select> menu: string argument
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58 if (!toolbarElement.selectedIndex) return;
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59 argVal = toolbarElement.value;
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60 argStr = "'" + argVal.replace("<", "&lt;").replace(">", "&gt;") + "'";
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61 toolbarElement.selectedIndex = 0; // reset drop-down list
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62 }
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63
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64 // send requested action and re-focus the editable element
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65 document.execCommand(command, false, argVal);
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66 if (gActiveEditor) gActiveEditor.focus();
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67
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68 // debug
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69 gCommandDump.innerHTML = "document.execCommand('" + command + "', false, '" + argStr + "');";
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70 }
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71
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72 window.addEventListener("DOMContentLoaded", function() {
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73 var i,
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74 buttons = document.querySelectorAll("*[data-command]"),
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75 editors = document.querySelectorAll("*[contenteditable]");
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76
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77 // initialize all toolbar buttons
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78 for (i = 0; i < buttons.length; i++) {
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79 buttons[i].onclick = function() { ExecCommand(this); };
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80 buttons[i].onchange = function() { ExecCommand(this); };
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81 }
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82
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83 // remember last-focused editable element
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84 for (i = 0; i < editors.length; i++)
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85 editors[i].onfocus = function() { gActiveEditor = this; };
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86
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87 // debug
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88 gCommandDump = document.querySelector("#execCommand");
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89 ExecCommand(document.querySelector("#useCSS"));
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90 }, false);
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91 } (this, document);
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92
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93 /** DOMNodeFocused
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94 * expected compatibility: all browsers except IE<9.
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95 *
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96 * This custom (non-standard) event is fired when a node in an editable element
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97 * gets the user focus.
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98 */
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99 !function(window, document, undefined) {
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100 var gLastFocusNode = null;
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101
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102 function onCaretMove(event) {
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103 var selection = document.getSelection();
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104 var node = selection.isCollapsed ? selection.focusNode
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105 : selection.getRangeAt(0).commonAncestorContainer;
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106 if (node != gLastFocusNode) {
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107 gLastFocusNode = node;
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108 // fire a 'DOMNodeFocused' mutation event with bubbling to set the .target
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109 //var evtObject = document.createEvent("MutationEvent");
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110 //evtObject.initMutationEvent("DOMNodeFocused", true, false, node, "", "", "", 0);
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111 // note that a standard event works fine, too :-)
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112 var evtObject = document.createEvent("Event");
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113 evtObject.initEvent("DOMNodeFocused", true, false);
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114 node.dispatchEvent(evtObject);
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115 }
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116 }
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117
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118 // trigger a 'DOMNodeFocused' event when the user moves the caret
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119 window.addEventListener("DOMContentLoaded", function() {
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120 var i, editors = document.querySelectorAll("*[contenteditable]");
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121 for (i = 0; i < editors.length; i++) {
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122 editors[i].addEventListener("keyup", onCaretMove, false);
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123 editors[i].addEventListener("mouseup", onCaretMove, false);
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124 }
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125 }, false);
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126 } (this, document);
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127
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128 /** Mutation Events -- demo!
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129 * expected compatibility: Firefox Aurora, possibly other modern browsers.
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130 * reference: https://developer.mozilla.org/en/XUL/Events#Mutation_DOM_events
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131 * http://help.dottoro.com/ljifcdwx.php
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132 *
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133 * SXE requires these (standard) mutation events:
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134 * - 'new': DOMNodeInserted
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135 * - 'remove': DOMNodeRemoved
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136 * - 'set': DOMSubtreeModified, DOMAttrModified, DOMCharacterDataModified
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137 *
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138 * Note: webkit doesn't support DOMAttrModified
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139 * https://bugs.webkit.org/show_bug.cgi?id=8191
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140 */
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141 window.addEventListener("DOMContentLoaded", function() {
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142 var breadcrumb = document.querySelector("#breadcrumb");
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143 function updateBreadCrumb(event) {
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144 if (!breadcrumb || !event || !event.target) return;
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145 var
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146 body = document.body,
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147 node = event.target,
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148 text = node.nodeName,
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149 tmp = node.parentNode;
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150 while (tmp && tmp != body) {
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151 text = tmp.nodeName + " > " + text;
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152 tmp = tmp.parentNode;
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153 }
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154 text = event.type + ": " + text;
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155 breadcrumb.innerHTML = text;
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156 console.log(text);
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157 }
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158
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159 // listening to mutation events on 'document' freezes Firefox :-/
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160 var i, editors = document.querySelectorAll("*[contenteditable]");
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161 for (i = 0; i < editors.length; i++) {
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162 // set
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163 editors[i].addEventListener("DOMAttrModified", updateBreadCrumb, false);
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164 editors[i].addEventListener("DOMSubtreeModified", updateBreadCrumb, false);
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165 editors[i].addEventListener("DOMCharacterDataModified", updateBreadCrumb, false);
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166 // new, remove
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167 editors[i].addEventListener("DOMNodeInserted", updateBreadCrumb, false);
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168 editors[i].addEventListener("DOMNodeRemoved", updateBreadCrumb, false);
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169 // focus (non-standard but can be useful)
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170 editors[i].addEventListener("DOMNodeFocused", updateBreadCrumb, false);
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171 }
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172 }, false);
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173