1 | /* |
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2 | Copyright (c) 2006, Yahoo! Inc. All rights reserved. |
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3 | Code licensed under the BSD License: |
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4 | http://developer.yahoo.net/yui/license.txt |
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5 | Version: 0.11.4 |
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6 | */ |
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7 | |
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8 | /** |
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9 | * The CustomEvent class lets you define events for your application |
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10 | * that can be subscribed to by one or more independent component. |
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11 | * |
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12 | * @param {String} type The type of event, which is passed to the callback |
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13 | * when the event fires |
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14 | * @param {Object} oScope The context the event will fire from. "this" will |
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15 | * refer to this object in the callback. Default value: |
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16 | * the window object. The listener can override this. |
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17 | * @param {boolean} silent pass true to prevent the event from writing to |
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18 | * the log system |
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19 | * @namespace YAHOO.util |
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20 | * @class CustomEvent |
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21 | * @constructor |
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22 | */ |
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23 | YAHOO.util.CustomEvent = function(type, oScope, silent) { |
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24 | |
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25 | /** |
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26 | * The type of event, returned to subscribers when the event fires |
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27 | * @property type |
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28 | * @type string |
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29 | */ |
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30 | this.type = type; |
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31 | |
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32 | /** |
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33 | * The scope the the event will fire from by default. Defaults to the window |
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34 | * obj |
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35 | * @property scope |
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36 | * @type object |
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37 | */ |
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38 | this.scope = oScope || window; |
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39 | |
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40 | /** |
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41 | * By default all custom events are logged in the debug build, set silent |
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42 | * to true to disable logging for this event. |
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43 | * @property silent |
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44 | * @type boolean |
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45 | */ |
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46 | this.silent = silent; |
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47 | |
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48 | /** |
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49 | * The subscribers to this event |
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50 | * @property subscribers |
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51 | * @type Subscriber[] |
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52 | */ |
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53 | this.subscribers = []; |
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54 | |
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55 | if (!this.silent) { |
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56 | } |
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57 | |
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58 | // Only add subscribe events for events that are not generated by CustomEvent |
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59 | //if (oScope && (oScope.constructor != this.constructor)) { |
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60 | |
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61 | /* |
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62 | * Custom events provide a custom event that fires whenever there is |
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63 | * a new subscriber to the event. This provides an opportunity to |
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64 | * handle the case where there is a non-repeating event that has |
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65 | * already fired has a new subscriber. |
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66 | * |
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67 | * type CustomEvent |
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68 | */ |
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69 | //this.subscribeEvent = |
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70 | //new YAHOO.util.CustomEvent("subscribe", this, true); |
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71 | |
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72 | //} |
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73 | }; |
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74 | |
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75 | YAHOO.util.CustomEvent.prototype = { |
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76 | /** |
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77 | * Subscribes the caller to this event |
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78 | * @method subscribe |
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79 | * @param {Function} fn The function to execute |
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80 | * @param {Object} obj An object to be passed along when the event fires |
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81 | * @param {boolean} bOverride If true, the obj passed in becomes the execution |
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82 | * scope of the listener |
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83 | */ |
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84 | subscribe: function(fn, obj, bOverride) { |
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85 | //if (this.subscribeEvent) { |
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86 | //this.subscribeEvent.fire(fn, obj, bOverride); |
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87 | //} |
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88 | |
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89 | this.subscribers.push( new YAHOO.util.Subscriber(fn, obj, bOverride) ); |
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90 | }, |
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91 | |
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92 | /** |
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93 | * Unsubscribes the caller from this event |
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94 | * @method unsubscribe |
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95 | * @param {Function} fn The function to execute |
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96 | * @param {Object} obj An object to be passed along when the event fires |
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97 | * @return {boolean} True if the subscriber was found and detached. |
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98 | */ |
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99 | unsubscribe: function(fn, obj) { |
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100 | var found = false; |
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101 | for (var i=0, len=this.subscribers.length; i<len; ++i) { |
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102 | var s = this.subscribers[i]; |
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103 | if (s && s.contains(fn, obj)) { |
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104 | this._delete(i); |
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105 | found = true; |
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106 | } |
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107 | } |
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108 | |
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109 | return found; |
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110 | }, |
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111 | |
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112 | /** |
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113 | * Notifies the subscribers. The callback functions will be executed |
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114 | * from the scope specified when the event was created, and with the following |
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115 | * parameters: |
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116 | * <pre> |
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117 | * - The type of event |
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118 | * - All of the arguments fire() was executed with as an array |
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119 | * - The custom object (if any) that was passed into the subscribe() method |
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120 | * </pre> |
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121 | * @method fire |
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122 | * @param {Array} an arbitrary set of parameters to pass to the handler |
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123 | */ |
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124 | fire: function() { |
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125 | var len=this.subscribers.length; |
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126 | if (!len && this.silent) { |
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127 | return; |
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128 | } |
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129 | |
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130 | var args = []; |
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131 | |
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132 | for (var i=0; i<arguments.length; ++i) { |
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133 | args.push(arguments[i]); |
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134 | } |
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135 | |
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136 | if (!this.silent) { |
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137 | } |
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138 | |
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139 | for (i=0; i<len; ++i) { |
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140 | var s = this.subscribers[i]; |
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141 | if (s) { |
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142 | if (!this.silent) { |
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143 | } |
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144 | var scope = (s.override) ? s.obj : this.scope; |
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145 | s.fn.call(scope, this.type, args, s.obj); |
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146 | } |
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147 | } |
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148 | }, |
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149 | |
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150 | /** |
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151 | * Removes all listeners |
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152 | * @method unsubscribeAll |
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153 | */ |
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154 | unsubscribeAll: function() { |
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155 | for (var i=0, len=this.subscribers.length; i<len; ++i) { |
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156 | this._delete(len - 1 - i); |
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157 | } |
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158 | }, |
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159 | |
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160 | /** |
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161 | * @method _delete |
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162 | * @private |
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163 | */ |
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164 | _delete: function(index) { |
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165 | var s = this.subscribers[index]; |
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166 | if (s) { |
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167 | delete s.fn; |
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168 | delete s.obj; |
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169 | } |
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170 | |
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171 | // delete this.subscribers[index]; |
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172 | this.subscribers.splice(index, 1); |
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173 | }, |
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174 | |
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175 | /** |
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176 | * @method toString |
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177 | */ |
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178 | toString: function() { |
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179 | return "CustomEvent: " + "'" + this.type + "', " + |
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180 | "scope: " + this.scope; |
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181 | |
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182 | } |
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183 | }; |
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184 | |
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185 | ///////////////////////////////////////////////////////////////////// |
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186 | |
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187 | /** |
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188 | * Stores the subscriber information to be used when the event fires. |
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189 | * @param {Function} fn The function to execute |
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190 | * @param {Object} obj An object to be passed along when the event fires |
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191 | * @param {boolean} bOverride If true, the obj passed in becomes the execution |
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192 | * scope of the listener |
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193 | * @class Subscriber |
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194 | * @constructor |
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195 | */ |
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196 | YAHOO.util.Subscriber = function(fn, obj, bOverride) { |
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197 | |
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198 | /** |
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199 | * The callback that will be execute when the event fires |
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200 | * @property fn |
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201 | * @type function |
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202 | */ |
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203 | this.fn = fn; |
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204 | |
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205 | /** |
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206 | * An optional custom object that will passed to the callback when |
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207 | * the event fires |
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208 | * @property obj |
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209 | * @type object |
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210 | */ |
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211 | this.obj = obj || null; |
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212 | |
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213 | /** |
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214 | * The default execution scope for the event listener is defined when the |
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215 | * event is created (usually the object which contains the event). |
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216 | * By setting override to true, the execution scope becomes the custom |
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217 | * object passed in by the subscriber |
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218 | * @property override |
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219 | * @type boolean |
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220 | */ |
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221 | this.override = (bOverride); |
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222 | }; |
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223 | |
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224 | /** |
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225 | * Returns true if the fn and obj match this objects properties. |
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226 | * Used by the unsubscribe method to match the right subscriber. |
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227 | * |
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228 | * @method contains |
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229 | * @param {Function} fn the function to execute |
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230 | * @param {Object} obj an object to be passed along when the event fires |
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231 | * @return {boolean} true if the supplied arguments match this |
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232 | * subscriber's signature. |
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233 | */ |
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234 | YAHOO.util.Subscriber.prototype.contains = function(fn, obj) { |
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235 | return (this.fn == fn && this.obj == obj); |
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236 | }; |
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237 | |
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238 | /** |
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239 | * @method toString |
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240 | */ |
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241 | YAHOO.util.Subscriber.prototype.toString = function() { |
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242 | return "Subscriber { obj: " + (this.obj || "") + |
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243 | ", override: " + (this.override || "no") + " }"; |
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244 | }; |
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245 | |
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246 | // The first instance of Event will win if it is loaded more than once. |
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247 | if (!YAHOO.util.Event) { |
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248 | |
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249 | /** |
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250 | * The event utility provides functions to add and remove event listeners, |
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251 | * event cleansing. It also tries to automatically remove listeners it |
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252 | * registers during the unload event. |
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253 | * @namespace YAHOO.util |
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254 | * @class Event |
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255 | */ |
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256 | YAHOO.util.Event = function() { |
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257 | |
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258 | /** |
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259 | * True after the onload event has fired |
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260 | * @property loadComplete |
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261 | * @type boolean |
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262 | * @private |
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263 | */ |
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264 | var loadComplete = false; |
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265 | |
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266 | /** |
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267 | * Cache of wrapped listeners |
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268 | * @property listeners |
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269 | * @type array |
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270 | * @private |
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271 | */ |
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272 | var listeners = []; |
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273 | |
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274 | /** |
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275 | * Listeners that will be attached during the onload event |
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276 | * @property delayedListeners |
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277 | * @type array |
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278 | * @private |
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279 | */ |
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280 | var delayedListeners = []; |
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281 | |
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282 | /** |
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283 | * User-defined unload function that will be fired before all events |
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284 | * are detached |
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285 | * @property unloadListeners |
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286 | * @type array |
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287 | * @private |
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288 | */ |
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289 | var unloadListeners = []; |
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290 | |
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291 | /** |
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292 | * Cache of DOM0 event handlers to work around issues with DOM2 events |
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293 | * in Safari |
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294 | * @property legacyEvents |
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295 | * @private |
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296 | */ |
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297 | var legacyEvents = []; |
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298 | |
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299 | /** |
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300 | * Listener stack for DOM0 events |
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301 | * @property legacyHandlers |
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302 | * @private |
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303 | */ |
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304 | var legacyHandlers = []; |
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305 | |
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306 | /** |
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307 | * The number of times to poll after window.onload. This number is |
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308 | * increased if additional late-bound handlers are requested after |
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309 | * the page load. |
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310 | * @property retryCount |
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311 | * @private |
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312 | */ |
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313 | var retryCount = 0; |
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314 | |
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315 | /** |
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316 | * onAvailable listeners |
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317 | * @property onAvailStack |
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318 | * @private |
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319 | */ |
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320 | var onAvailStack = []; |
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321 | |
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322 | /** |
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323 | * Lookup table for legacy events |
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324 | * @property legacyMap |
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325 | * @private |
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326 | */ |
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327 | var legacyMap = []; |
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328 | |
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329 | /** |
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330 | * Counter for auto id generation |
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331 | * @property counter |
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332 | * @private |
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333 | */ |
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334 | var counter = 0; |
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335 | |
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336 | return { // PREPROCESS |
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337 | |
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338 | /** |
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339 | * The number of times we should look for elements that are not |
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340 | * in the DOM at the time the event is requested after the document |
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341 | * has been loaded. The default is 200@amp;50 ms, so it will poll |
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342 | * for 10 seconds or until all outstanding handlers are bound |
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343 | * (whichever comes first). |
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344 | * @property POLL_RETRYS |
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345 | * @type int |
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346 | */ |
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347 | POLL_RETRYS: 200, |
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348 | |
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349 | /** |
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350 | * The poll interval in milliseconds |
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351 | * @property POLL_INTERVAL |
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352 | * @type int |
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353 | */ |
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354 | POLL_INTERVAL: 50, |
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355 | |
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356 | /** |
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357 | * Element to bind, int constant |
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358 | * @property EL |
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359 | * @type int |
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360 | */ |
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361 | EL: 0, |
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362 | |
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363 | /** |
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364 | * Type of event, int constant |
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365 | * @property TYPE |
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366 | * @type int |
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367 | */ |
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368 | TYPE: 1, |
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369 | |
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370 | /** |
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371 | * Function to execute, int constant |
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372 | * @property FN |
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373 | * @type int |
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374 | */ |
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375 | FN: 2, |
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376 | |
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377 | /** |
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378 | * Function wrapped for scope correction and cleanup, int constant |
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379 | * @property WFN |
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380 | * @type int |
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381 | */ |
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382 | WFN: 3, |
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383 | |
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384 | /** |
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385 | * Object passed in by the user that will be returned as a |
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386 | * parameter to the callback, int constant |
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387 | * @property SCOPE |
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388 | * @type int |
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389 | */ |
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390 | SCOPE: 3, |
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391 | |
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392 | /** |
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393 | * Adjusted scope, either the element we are registering the event |
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394 | * on or the custom object passed in by the listener, int constant |
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395 | * @property ADJ_SCOPE |
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396 | * @type int |
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397 | */ |
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398 | ADJ_SCOPE: 4, |
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399 | |
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400 | /** |
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401 | * Safari detection is necessary to work around the preventDefault |
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402 | * bug that makes it so you can't cancel a href click from the |
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403 | * handler. There is not a capabilities check we can use here. |
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404 | * @property isSafari |
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405 | * @private |
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406 | */ |
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407 | isSafari: (/Safari|Konqueror|KHTML/gi).test(navigator.userAgent), |
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408 | |
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409 | /** |
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410 | * IE detection needed to properly calculate pageX and pageY. |
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411 | * capabilities checking didn't seem to work because another |
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412 | * browser that does not provide the properties have the values |
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413 | * calculated in a different manner than IE. |
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414 | * @property isIE |
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415 | * @private |
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416 | */ |
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417 | isIE: (!this.isSafari && !navigator.userAgent.match(/opera/gi) && |
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418 | navigator.userAgent.match(/msie/gi)), |
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419 | |
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420 | /** |
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421 | * @method addDelayedListener |
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422 | * @private |
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423 | */ |
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424 | addDelayedListener: function(el, sType, fn, oScope, bOverride) { |
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425 | delayedListeners[delayedListeners.length] = |
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426 | [el, sType, fn, oScope, bOverride]; |
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427 | |
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428 | // If this happens after the inital page load, we need to |
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429 | // reset the poll counter so that we continue to search for |
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430 | // the element for a fixed period of time. |
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431 | if (loadComplete) { |
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432 | retryCount = this.POLL_RETRYS; |
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433 | this.startTimeout(0); |
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434 | // this._tryPreloadAttach(); |
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435 | } |
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436 | }, |
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437 | |
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438 | /** |
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439 | * @method startTimeout |
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440 | * @private |
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441 | */ |
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442 | startTimeout: function(interval) { |
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443 | var i = (interval || interval === 0) ? interval : this.POLL_INTERVAL; |
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444 | var self = this; |
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445 | var callback = function() { self._tryPreloadAttach(); }; |
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446 | this.timeout = setTimeout(callback, i); |
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447 | }, |
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448 | |
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449 | /** |
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450 | * Executes the supplied callback when the item with the supplied |
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451 | * id is found. This is meant to be used to execute behavior as |
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452 | * soon as possible as the page loads. If you use this after the |
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453 | * initial page load it will poll for a fixed time for the element. |
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454 | * The number of times it will poll and the frequency are |
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455 | * configurable. By default it will poll for 10 seconds. |
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456 | * |
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457 | * @method onAvailable |
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458 | * |
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459 | * @param {string} p_id the id of the element to look for. |
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460 | * @param {function} p_fn what to execute when the element is found. |
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461 | * @param {object} p_obj an optional object to be passed back as |
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462 | * a parameter to p_fn. |
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463 | * @param {boolean} p_override If set to true, p_fn will execute |
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464 | * in the scope of p_obj |
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465 | * |
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466 | */ |
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467 | onAvailable: function(p_id, p_fn, p_obj, p_override) { |
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468 | onAvailStack.push( { id: p_id, |
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469 | fn: p_fn, |
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470 | obj: p_obj, |
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471 | override: p_override } ); |
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472 | |
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473 | retryCount = this.POLL_RETRYS; |
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474 | this.startTimeout(0); |
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475 | // this._tryPreloadAttach(); |
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476 | }, |
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477 | |
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478 | /** |
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479 | * Appends an event handler |
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480 | * |
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481 | * @method addListener |
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482 | * |
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483 | * @param {Object} el The html element to assign the |
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484 | * event to |
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485 | * @param {String} sType The type of event to append |
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486 | * @param {Function} fn The method the event invokes |
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487 | * @param {Object} oScope An arbitrary object that will be |
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488 | * passed as a parameter to the handler |
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489 | * @param {boolean} bOverride If true, the obj passed in becomes |
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490 | * the execution scope of the listener |
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491 | * @return {boolean} True if the action was successful or defered, |
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492 | * false if one or more of the elements |
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493 | * could not have the event bound to it. |
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494 | */ |
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495 | addListener: function(el, sType, fn, oScope, bOverride) { |
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496 | |
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497 | if (!fn || !fn.call) { |
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498 | return false; |
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499 | } |
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500 | |
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501 | // The el argument can be an array of elements or element ids. |
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502 | if ( this._isValidCollection(el)) { |
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503 | var ok = true; |
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504 | for (var i=0,len=el.length; i<len; ++i) { |
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505 | ok = ( this.on(el[i], |
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506 | sType, |
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507 | fn, |
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508 | oScope, |
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509 | bOverride) && ok ); |
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510 | } |
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511 | return ok; |
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512 | |
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513 | } else if (typeof el == "string") { |
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514 | var oEl = this.getEl(el); |
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515 | // If the el argument is a string, we assume it is |
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516 | // actually the id of the element. If the page is loaded |
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517 | // we convert el to the actual element, otherwise we |
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518 | // defer attaching the event until onload event fires |
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519 | |
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520 | // check to see if we need to delay hooking up the event |
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521 | // until after the page loads. |
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522 | if (loadComplete && oEl) { |
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523 | el = oEl; |
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524 | } else { |
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525 | // defer adding the event until onload fires |
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526 | this.addDelayedListener(el, |
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527 | sType, |
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528 | fn, |
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529 | oScope, |
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530 | bOverride); |
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531 | |
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532 | return true; |
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533 | } |
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534 | } |
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535 | |
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536 | // Element should be an html element or an array if we get |
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537 | // here. |
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538 | if (!el) { |
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539 | return false; |
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540 | } |
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541 | |
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542 | // we need to make sure we fire registered unload events |
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543 | // prior to automatically unhooking them. So we hang on to |
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544 | // these instead of attaching them to the window and fire the |
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545 | // handles explicitly during our one unload event. |
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546 | if ("unload" == sType && oScope !== this) { |
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547 | unloadListeners[unloadListeners.length] = |
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548 | [el, sType, fn, oScope, bOverride]; |
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549 | return true; |
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550 | } |
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551 | |
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552 | // if the user chooses to override the scope, we use the custom |
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553 | // object passed in, otherwise the executing scope will be the |
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554 | // HTML element that the event is registered on |
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555 | var scope = (bOverride) ? oScope : el; |
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556 | |
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557 | // wrap the function so we can return the oScope object when |
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558 | // the event fires; |
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559 | var wrappedFn = function(e) { |
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560 | return fn.call(scope, YAHOO.util.Event.getEvent(e), |
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561 | oScope); |
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562 | }; |
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563 | |
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564 | var li = [el, sType, fn, wrappedFn, scope]; |
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565 | var index = listeners.length; |
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566 | // cache the listener so we can try to automatically unload |
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567 | listeners[index] = li; |
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568 | |
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569 | if (this.useLegacyEvent(el, sType)) { |
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570 | var legacyIndex = this.getLegacyIndex(el, sType); |
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571 | |
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572 | // Add a new dom0 wrapper if one is not detected for this |
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573 | // element |
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574 | if ( legacyIndex == -1 || |
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575 | el != legacyEvents[legacyIndex][0] ) { |
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576 | |
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577 | legacyIndex = legacyEvents.length; |
---|
578 | legacyMap[el.id + sType] = legacyIndex; |
---|
579 | |
---|
580 | // cache the signature for the DOM0 event, and |
---|
581 | // include the existing handler for the event, if any |
---|
582 | legacyEvents[legacyIndex] = |
---|
583 | [el, sType, el["on" + sType]]; |
---|
584 | legacyHandlers[legacyIndex] = []; |
---|
585 | |
---|
586 | el["on" + sType] = |
---|
587 | function(e) { |
---|
588 | YAHOO.util.Event.fireLegacyEvent( |
---|
589 | YAHOO.util.Event.getEvent(e), legacyIndex); |
---|
590 | }; |
---|
591 | } |
---|
592 | |
---|
593 | // add a reference to the wrapped listener to our custom |
---|
594 | // stack of events |
---|
595 | //legacyHandlers[legacyIndex].push(index); |
---|
596 | legacyHandlers[legacyIndex].push(li); |
---|
597 | |
---|
598 | // DOM2 Event model |
---|
599 | } else if (el.addEventListener) { |
---|
600 | el.addEventListener(sType, wrappedFn, false); |
---|
601 | // IE |
---|
602 | } else if (el.attachEvent) { |
---|
603 | el.attachEvent("on" + sType, wrappedFn); |
---|
604 | } |
---|
605 | |
---|
606 | return true; |
---|
607 | |
---|
608 | }, |
---|
609 | |
---|
610 | /** |
---|
611 | * When using legacy events, the handler is routed to this object |
---|
612 | * so we can fire our custom listener stack. |
---|
613 | * @method fireLegacyEvent |
---|
614 | * @private |
---|
615 | */ |
---|
616 | fireLegacyEvent: function(e, legacyIndex) { |
---|
617 | var ok = true; |
---|
618 | |
---|
619 | var le = legacyHandlers[legacyIndex]; |
---|
620 | for (var i=0,len=le.length; i<len; ++i) { |
---|
621 | var li = le[i]; |
---|
622 | if ( li && li[this.WFN] ) { |
---|
623 | var scope = li[this.ADJ_SCOPE]; |
---|
624 | var ret = li[this.WFN].call(scope, e); |
---|
625 | ok = (ok && ret); |
---|
626 | } |
---|
627 | } |
---|
628 | |
---|
629 | return ok; |
---|
630 | }, |
---|
631 | |
---|
632 | /** |
---|
633 | * Returns the legacy event index that matches the supplied |
---|
634 | * signature |
---|
635 | * @method getLegacyIndex |
---|
636 | * @private |
---|
637 | */ |
---|
638 | getLegacyIndex: function(el, sType) { |
---|
639 | var key = this.generateId(el) + sType; |
---|
640 | if (typeof legacyMap[key] == "undefined") { |
---|
641 | return -1; |
---|
642 | } else { |
---|
643 | return legacyMap[key]; |
---|
644 | } |
---|
645 | }, |
---|
646 | |
---|
647 | /** |
---|
648 | * Logic that determines when we should automatically use legacy |
---|
649 | * events instead of DOM2 events. |
---|
650 | * @method useLegacyEvent |
---|
651 | * @private |
---|
652 | */ |
---|
653 | useLegacyEvent: function(el, sType) { |
---|
654 | if (!el.addEventListener && !el.attachEvent) { |
---|
655 | return true; |
---|
656 | } else if (this.isSafari) { |
---|
657 | if ("click" == sType || "dblclick" == sType) { |
---|
658 | return true; |
---|
659 | } |
---|
660 | } |
---|
661 | return false; |
---|
662 | }, |
---|
663 | |
---|
664 | /** |
---|
665 | * Removes an event handler |
---|
666 | * |
---|
667 | * @method removeListener |
---|
668 | * |
---|
669 | * @param {Object} el the html element or the id of the element to |
---|
670 | * assign the event to. |
---|
671 | * @param {String} sType the type of event to remove |
---|
672 | * @param {Function} fn the method the event invokes |
---|
673 | * @return {boolean} true if the unbind was successful, false |
---|
674 | * otherwise |
---|
675 | */ |
---|
676 | removeListener: function(el, sType, fn, index) { |
---|
677 | |
---|
678 | if (!fn || !fn.call) { |
---|
679 | return false; |
---|
680 | } |
---|
681 | |
---|
682 | var i, len; |
---|
683 | |
---|
684 | // The el argument can be a string |
---|
685 | if (typeof el == "string") { |
---|
686 | el = this.getEl(el); |
---|
687 | // The el argument can be an array of elements or element ids. |
---|
688 | } else if ( this._isValidCollection(el)) { |
---|
689 | var ok = true; |
---|
690 | for (i=0,len=el.length; i<len; ++i) { |
---|
691 | ok = ( this.removeListener(el[i], sType, fn) && ok ); |
---|
692 | } |
---|
693 | return ok; |
---|
694 | } |
---|
695 | |
---|
696 | if ("unload" == sType) { |
---|
697 | |
---|
698 | for (i=0, len=unloadListeners.length; i<len; i++) { |
---|
699 | var li = unloadListeners[i]; |
---|
700 | if (li && |
---|
701 | li[0] == el && |
---|
702 | li[1] == sType && |
---|
703 | li[2] == fn) { |
---|
704 | unloadListeners.splice(i, 1); |
---|
705 | return true; |
---|
706 | } |
---|
707 | } |
---|
708 | |
---|
709 | return false; |
---|
710 | } |
---|
711 | |
---|
712 | var cacheItem = null; |
---|
713 | |
---|
714 | //var index = arguments[3]; |
---|
715 | |
---|
716 | if ("undefined" == typeof index) { |
---|
717 | index = this._getCacheIndex(el, sType, fn); |
---|
718 | } |
---|
719 | |
---|
720 | if (index >= 0) { |
---|
721 | cacheItem = listeners[index]; |
---|
722 | } |
---|
723 | |
---|
724 | if (!el || !cacheItem) { |
---|
725 | return false; |
---|
726 | } |
---|
727 | |
---|
728 | if (this.useLegacyEvent(el, sType)) { |
---|
729 | var legacyIndex = this.getLegacyIndex(el, sType); |
---|
730 | var llist = legacyHandlers[legacyIndex]; |
---|
731 | if (llist) { |
---|
732 | for (i=0, len=llist.length; i<len; ++i) { |
---|
733 | li = llist[i]; |
---|
734 | if (li && |
---|
735 | li[this.EL] == el && |
---|
736 | li[this.TYPE] == sType && |
---|
737 | li[this.FN] == fn) { |
---|
738 | llist.splice(i, 1); |
---|
739 | } |
---|
740 | } |
---|
741 | } |
---|
742 | |
---|
743 | } else if (el.removeEventListener) { |
---|
744 | el.removeEventListener(sType, cacheItem[this.WFN], false); |
---|
745 | } else if (el.detachEvent) { |
---|
746 | el.detachEvent("on" + sType, cacheItem[this.WFN]); |
---|
747 | } |
---|
748 | |
---|
749 | // removed the wrapped handler |
---|
750 | delete listeners[index][this.WFN]; |
---|
751 | delete listeners[index][this.FN]; |
---|
752 | listeners.splice(index, 1); |
---|
753 | |
---|
754 | return true; |
---|
755 | |
---|
756 | }, |
---|
757 | |
---|
758 | /** |
---|
759 | * Returns the event's target element |
---|
760 | * @method getTarget |
---|
761 | * @param {Event} ev the event |
---|
762 | * @param {boolean} resolveTextNode when set to true the target's |
---|
763 | * parent will be returned if the target is a |
---|
764 | * text node. @deprecated, the text node is |
---|
765 | * now resolved automatically |
---|
766 | * @return {HTMLElement} the event's target |
---|
767 | */ |
---|
768 | getTarget: function(ev, resolveTextNode) { |
---|
769 | var t = ev.target || ev.srcElement; |
---|
770 | return this.resolveTextNode(t); |
---|
771 | }, |
---|
772 | |
---|
773 | /** |
---|
774 | * In some cases, some browsers will return a text node inside |
---|
775 | * the actual element that was targeted. This normalizes the |
---|
776 | * return value for getTarget and getRelatedTarget. |
---|
777 | * @method resolveTextNode |
---|
778 | * @param {HTMLElement} node to resolve |
---|
779 | * @return the normized node |
---|
780 | */ |
---|
781 | resolveTextNode: function(node) { |
---|
782 | if (node && node.nodeName && |
---|
783 | "#TEXT" == node.nodeName.toUpperCase()) { |
---|
784 | return node.parentNode; |
---|
785 | } else { |
---|
786 | return node; |
---|
787 | } |
---|
788 | }, |
---|
789 | |
---|
790 | /** |
---|
791 | * Returns the event's pageX |
---|
792 | * @method getPageX |
---|
793 | * @param {Event} ev the event |
---|
794 | * @return {int} the event's pageX |
---|
795 | */ |
---|
796 | getPageX: function(ev) { |
---|
797 | var x = ev.pageX; |
---|
798 | if (!x && 0 !== x) { |
---|
799 | x = ev.clientX || 0; |
---|
800 | |
---|
801 | if ( this.isIE ) { |
---|
802 | x += this._getScrollLeft(); |
---|
803 | } |
---|
804 | } |
---|
805 | |
---|
806 | return x; |
---|
807 | }, |
---|
808 | |
---|
809 | /** |
---|
810 | * Returns the event's pageY |
---|
811 | * @method getPageY |
---|
812 | * @param {Event} ev the event |
---|
813 | * @return {int} the event's pageY |
---|
814 | */ |
---|
815 | getPageY: function(ev) { |
---|
816 | var y = ev.pageY; |
---|
817 | if (!y && 0 !== y) { |
---|
818 | y = ev.clientY || 0; |
---|
819 | |
---|
820 | if ( this.isIE ) { |
---|
821 | y += this._getScrollTop(); |
---|
822 | } |
---|
823 | } |
---|
824 | |
---|
825 | return y; |
---|
826 | }, |
---|
827 | |
---|
828 | /** |
---|
829 | * Returns the pageX and pageY properties as an indexed array. |
---|
830 | * @method getXY |
---|
831 | * @type int[] |
---|
832 | */ |
---|
833 | getXY: function(ev) { |
---|
834 | return [this.getPageX(ev), this.getPageY(ev)]; |
---|
835 | }, |
---|
836 | |
---|
837 | /** |
---|
838 | * Returns the event's related target |
---|
839 | * @method getRelatedTarget |
---|
840 | * @param {Event} ev the event |
---|
841 | * @return {HTMLElement} the event's relatedTarget |
---|
842 | */ |
---|
843 | getRelatedTarget: function(ev) { |
---|
844 | var t = ev.relatedTarget; |
---|
845 | if (!t) { |
---|
846 | if (ev.type == "mouseout") { |
---|
847 | t = ev.toElement; |
---|
848 | } else if (ev.type == "mouseover") { |
---|
849 | t = ev.fromElement; |
---|
850 | } |
---|
851 | } |
---|
852 | |
---|
853 | return this.resolveTextNode(t); |
---|
854 | }, |
---|
855 | |
---|
856 | /** |
---|
857 | * Returns the time of the event. If the time is not included, the |
---|
858 | * event is modified using the current time. |
---|
859 | * @method getTime |
---|
860 | * @param {Event} ev the event |
---|
861 | * @return {Date} the time of the event |
---|
862 | */ |
---|
863 | getTime: function(ev) { |
---|
864 | if (!ev.time) { |
---|
865 | var t = new Date().getTime(); |
---|
866 | try { |
---|
867 | ev.time = t; |
---|
868 | } catch(e) { |
---|
869 | // can't set the time property |
---|
870 | return t; |
---|
871 | } |
---|
872 | } |
---|
873 | |
---|
874 | return ev.time; |
---|
875 | }, |
---|
876 | |
---|
877 | /** |
---|
878 | * Convenience method for stopPropagation + preventDefault |
---|
879 | * @method stopEvent |
---|
880 | * @param {Event} ev the event |
---|
881 | */ |
---|
882 | stopEvent: function(ev) { |
---|
883 | this.stopPropagation(ev); |
---|
884 | this.preventDefault(ev); |
---|
885 | }, |
---|
886 | |
---|
887 | /** |
---|
888 | * Stops event propagation |
---|
889 | * @method stopPropagation |
---|
890 | * @param {Event} ev the event |
---|
891 | */ |
---|
892 | stopPropagation: function(ev) { |
---|
893 | if (ev.stopPropagation) { |
---|
894 | ev.stopPropagation(); |
---|
895 | } else { |
---|
896 | ev.cancelBubble = true; |
---|
897 | } |
---|
898 | }, |
---|
899 | |
---|
900 | /** |
---|
901 | * Prevents the default behavior of the event |
---|
902 | * @method preventDefault |
---|
903 | * @param {Event} ev the event |
---|
904 | */ |
---|
905 | preventDefault: function(ev) { |
---|
906 | if (ev.preventDefault) { |
---|
907 | ev.preventDefault(); |
---|
908 | } else { |
---|
909 | ev.returnValue = false; |
---|
910 | } |
---|
911 | }, |
---|
912 | |
---|
913 | /** |
---|
914 | * Finds the event in the window object, the caller's arguments, or |
---|
915 | * in the arguments of another method in the callstack. This is |
---|
916 | * executed automatically for events registered through the event |
---|
917 | * manager, so the implementer should not normally need to execute |
---|
918 | * this function at all. |
---|
919 | * @method getEvent |
---|
920 | * @param {Event} the event parameter from the handler |
---|
921 | * @return {Event} the event |
---|
922 | */ |
---|
923 | getEvent: function(e) { |
---|
924 | var ev = e || window.event; |
---|
925 | |
---|
926 | if (!ev) { |
---|
927 | var c = this.getEvent.caller; |
---|
928 | while (c) { |
---|
929 | ev = c.arguments[0]; |
---|
930 | if (ev && Event == ev.constructor) { |
---|
931 | break; |
---|
932 | } |
---|
933 | c = c.caller; |
---|
934 | } |
---|
935 | } |
---|
936 | |
---|
937 | return ev; |
---|
938 | }, |
---|
939 | |
---|
940 | /** |
---|
941 | * Returns the charcode for an event |
---|
942 | * @method getCharCode |
---|
943 | * @param {Event} ev the event |
---|
944 | * @return {int} the event's charCode |
---|
945 | */ |
---|
946 | getCharCode: function(ev) { |
---|
947 | return ev.charCode || ((ev.type == "keypress") ? ev.keyCode : 0); |
---|
948 | }, |
---|
949 | |
---|
950 | /** |
---|
951 | * Locating the saved event handler data by function ref |
---|
952 | * |
---|
953 | * @method _getCacheIndex |
---|
954 | * @private |
---|
955 | */ |
---|
956 | _getCacheIndex: function(el, sType, fn) { |
---|
957 | for (var i=0,len=listeners.length; i<len; ++i) { |
---|
958 | var li = listeners[i]; |
---|
959 | if ( li && |
---|
960 | li[this.FN] == fn && |
---|
961 | li[this.EL] == el && |
---|
962 | li[this.TYPE] == sType ) { |
---|
963 | return i; |
---|
964 | } |
---|
965 | } |
---|
966 | |
---|
967 | return -1; |
---|
968 | }, |
---|
969 | |
---|
970 | /** |
---|
971 | * Generates an unique ID for the element if it does not already |
---|
972 | * have one. |
---|
973 | * @method generateId |
---|
974 | * @param el the element |
---|
975 | * @return {string} the id of the element |
---|
976 | */ |
---|
977 | generateId: function(el) { |
---|
978 | var id = el.id; |
---|
979 | |
---|
980 | if (!id) { |
---|
981 | id = "yuievtautoid-" + counter; |
---|
982 | ++counter; |
---|
983 | el.id = id; |
---|
984 | } |
---|
985 | |
---|
986 | return id; |
---|
987 | }, |
---|
988 | |
---|
989 | /** |
---|
990 | * We want to be able to use getElementsByTagName as a collection |
---|
991 | * to attach a group of events to. Unfortunately, different |
---|
992 | * browsers return different types of collections. This function |
---|
993 | * tests to determine if the object is array-like. It will also |
---|
994 | * fail if the object is an array, but is empty. |
---|
995 | * @method _isValidCollection |
---|
996 | * @param o the object to test |
---|
997 | * @return {boolean} true if the object is array-like and populated |
---|
998 | * @private |
---|
999 | */ |
---|
1000 | _isValidCollection: function(o) { |
---|
1001 | |
---|
1002 | return ( o && // o is something |
---|
1003 | o.length && // o is indexed |
---|
1004 | typeof o != "string" && // o is not a string |
---|
1005 | !o.tagName && // o is not an HTML element |
---|
1006 | !o.alert && // o is not a window |
---|
1007 | typeof o[0] != "undefined" ); |
---|
1008 | |
---|
1009 | }, |
---|
1010 | |
---|
1011 | /** |
---|
1012 | * @private |
---|
1013 | * @property elCache |
---|
1014 | * DOM element cache |
---|
1015 | */ |
---|
1016 | elCache: {}, |
---|
1017 | |
---|
1018 | /** |
---|
1019 | * We cache elements bound by id because when the unload event |
---|
1020 | * fires, we can no longer use document.getElementById |
---|
1021 | * @method getEl |
---|
1022 | * @private |
---|
1023 | */ |
---|
1024 | getEl: function(id) { |
---|
1025 | return document.getElementById(id); |
---|
1026 | }, |
---|
1027 | |
---|
1028 | /** |
---|
1029 | * Clears the element cache |
---|
1030 | * @deprecated |
---|
1031 | * @private |
---|
1032 | */ |
---|
1033 | clearCache: function() { }, |
---|
1034 | |
---|
1035 | /** |
---|
1036 | * hook up any deferred listeners |
---|
1037 | * @method _load |
---|
1038 | * @private |
---|
1039 | */ |
---|
1040 | _load: function(e) { |
---|
1041 | loadComplete = true; |
---|
1042 | var EU = YAHOO.util.Event; |
---|
1043 | EU._simpleRemove(window, "load", EU._load); |
---|
1044 | }, |
---|
1045 | |
---|
1046 | /** |
---|
1047 | * Polling function that runs before the onload event fires, |
---|
1048 | * attempting to attach to DOM Nodes as soon as they are |
---|
1049 | * available |
---|
1050 | * @method _tryPreloadAttach |
---|
1051 | * @private |
---|
1052 | */ |
---|
1053 | _tryPreloadAttach: function() { |
---|
1054 | |
---|
1055 | if (this.locked) { |
---|
1056 | return false; |
---|
1057 | } |
---|
1058 | |
---|
1059 | this.locked = true; |
---|
1060 | |
---|
1061 | // keep trying until after the page is loaded. We need to |
---|
1062 | // check the page load state prior to trying to bind the |
---|
1063 | // elements so that we can be certain all elements have been |
---|
1064 | // tested appropriately |
---|
1065 | var tryAgain = !loadComplete; |
---|
1066 | if (!tryAgain) { |
---|
1067 | tryAgain = (retryCount > 0); |
---|
1068 | } |
---|
1069 | |
---|
1070 | // Delayed listeners |
---|
1071 | var stillDelayed = []; |
---|
1072 | |
---|
1073 | for (var i=0,len=delayedListeners.length; i<len; ++i) { |
---|
1074 | var d = delayedListeners[i]; |
---|
1075 | // There may be a race condition here, so we need to |
---|
1076 | // verify the array element is usable. |
---|
1077 | if (d) { |
---|
1078 | |
---|
1079 | // el will be null if document.getElementById did not |
---|
1080 | // work |
---|
1081 | var el = this.getEl(d[this.EL]); |
---|
1082 | |
---|
1083 | if (el) { |
---|
1084 | this.on(el, d[this.TYPE], d[this.FN], |
---|
1085 | d[this.SCOPE], d[this.ADJ_SCOPE]); |
---|
1086 | delete delayedListeners[i]; |
---|
1087 | } else { |
---|
1088 | stillDelayed.push(d); |
---|
1089 | } |
---|
1090 | } |
---|
1091 | } |
---|
1092 | |
---|
1093 | delayedListeners = stillDelayed; |
---|
1094 | |
---|
1095 | // onAvailable |
---|
1096 | var notAvail = []; |
---|
1097 | for (i=0,len=onAvailStack.length; i<len ; ++i) { |
---|
1098 | var item = onAvailStack[i]; |
---|
1099 | if (item) { |
---|
1100 | el = this.getEl(item.id); |
---|
1101 | |
---|
1102 | if (el) { |
---|
1103 | var scope = (item.override) ? item.obj : el; |
---|
1104 | item.fn.call(scope, item.obj); |
---|
1105 | delete onAvailStack[i]; |
---|
1106 | } else { |
---|
1107 | notAvail.push(item); |
---|
1108 | } |
---|
1109 | } |
---|
1110 | } |
---|
1111 | |
---|
1112 | retryCount = (stillDelayed.length === 0 && |
---|
1113 | notAvail.length === 0) ? 0 : retryCount - 1; |
---|
1114 | |
---|
1115 | if (tryAgain) { |
---|
1116 | this.startTimeout(); |
---|
1117 | } |
---|
1118 | |
---|
1119 | this.locked = false; |
---|
1120 | |
---|
1121 | return true; |
---|
1122 | |
---|
1123 | }, |
---|
1124 | |
---|
1125 | /** |
---|
1126 | * Removes all listeners attached to the given element via addListener. |
---|
1127 | * Optionally, the node's children can also be purged. |
---|
1128 | * Optionally, you can specify a specific type of event to remove. |
---|
1129 | * @method purgeElement |
---|
1130 | * @param {HTMLElement} el the element to purge |
---|
1131 | * @param {boolean} recurse recursively purge this element's children |
---|
1132 | * as well. Use with caution. |
---|
1133 | * @param {string} sType optional type of listener to purge. If |
---|
1134 | * left out, all listeners will be removed |
---|
1135 | */ |
---|
1136 | purgeElement: function(el, recurse, sType) { |
---|
1137 | var elListeners = this.getListeners(el, sType); |
---|
1138 | if (elListeners) { |
---|
1139 | for (var i=0,len=elListeners.length; i<len ; ++i) { |
---|
1140 | var l = elListeners[i]; |
---|
1141 | // can't use the index on the changing collection |
---|
1142 | //this.removeListener(el, l.type, l.fn, l.index); |
---|
1143 | this.removeListener(el, l.type, l.fn); |
---|
1144 | } |
---|
1145 | } |
---|
1146 | |
---|
1147 | if (recurse && el && el.childNodes) { |
---|
1148 | for (i=0,len=el.childNodes.length; i<len ; ++i) { |
---|
1149 | this.purgeElement(el.childNodes[i], recurse, sType); |
---|
1150 | } |
---|
1151 | } |
---|
1152 | }, |
---|
1153 | |
---|
1154 | /** |
---|
1155 | * Returns all listeners attached to the given element via addListener. |
---|
1156 | * Optionally, you can specify a specific type of event to return. |
---|
1157 | * @method getListeners |
---|
1158 | * @param el {HTMLElement} the element to inspect |
---|
1159 | * @param sType {string} optional type of listener to return. If |
---|
1160 | * left out, all listeners will be returned |
---|
1161 | * @return {Object} the listener. Contains the following fields: |
---|
1162 | * type: (string) the type of event |
---|
1163 | * fn: (function) the callback supplied to addListener |
---|
1164 | * obj: (object) the custom object supplied to addListener |
---|
1165 | * adjust: (boolean) whether or not to adjust the default scope |
---|
1166 | * index: (int) its position in the Event util listener cache |
---|
1167 | */ |
---|
1168 | getListeners: function(el, sType) { |
---|
1169 | var elListeners = []; |
---|
1170 | if (listeners && listeners.length > 0) { |
---|
1171 | for (var i=0,len=listeners.length; i<len ; ++i) { |
---|
1172 | var l = listeners[i]; |
---|
1173 | if ( l && l[this.EL] === el && |
---|
1174 | (!sType || sType === l[this.TYPE]) ) { |
---|
1175 | elListeners.push({ |
---|
1176 | type: l[this.TYPE], |
---|
1177 | fn: l[this.FN], |
---|
1178 | obj: l[this.SCOPE], |
---|
1179 | adjust: l[this.ADJ_SCOPE], |
---|
1180 | index: i |
---|
1181 | }); |
---|
1182 | } |
---|
1183 | } |
---|
1184 | } |
---|
1185 | |
---|
1186 | return (elListeners.length) ? elListeners : null; |
---|
1187 | }, |
---|
1188 | |
---|
1189 | /** |
---|
1190 | * Removes all listeners registered by pe.event. Called |
---|
1191 | * automatically during the unload event. |
---|
1192 | * @method _unload |
---|
1193 | * @private |
---|
1194 | */ |
---|
1195 | _unload: function(e) { |
---|
1196 | |
---|
1197 | var EU = YAHOO.util.Event; |
---|
1198 | |
---|
1199 | for (var i=0,len=unloadListeners.length; i<len; ++i) { |
---|
1200 | var l = unloadListeners[i]; |
---|
1201 | if (l) { |
---|
1202 | var scope = (l[EU.ADJ_SCOPE]) ? l[EU.SCOPE]: window; |
---|
1203 | l[EU.FN].call(scope, EU.getEvent(e), l[EU.SCOPE] ); |
---|
1204 | delete unloadListeners[i]; |
---|
1205 | l=null; |
---|
1206 | } |
---|
1207 | } |
---|
1208 | |
---|
1209 | if (listeners && listeners.length > 0) { |
---|
1210 | //for (i=0,len=listeners.length; i<len ; ++i) { |
---|
1211 | var j = listeners.length; |
---|
1212 | while (j) { |
---|
1213 | var index = j-1; |
---|
1214 | l = listeners[index]; |
---|
1215 | if (l) { |
---|
1216 | EU.removeListener(l[EU.EL], l[EU.TYPE], |
---|
1217 | l[EU.FN], index); |
---|
1218 | } |
---|
1219 | |
---|
1220 | l=null; |
---|
1221 | |
---|
1222 | j = j - 1; |
---|
1223 | } |
---|
1224 | |
---|
1225 | EU.clearCache(); |
---|
1226 | } |
---|
1227 | |
---|
1228 | for (i=0,len=legacyEvents.length; i<len; ++i) { |
---|
1229 | // dereference the element |
---|
1230 | delete legacyEvents[i][0]; |
---|
1231 | // delete the array item |
---|
1232 | delete legacyEvents[i]; |
---|
1233 | } |
---|
1234 | |
---|
1235 | EU._simpleRemove(window, "unload", EU._unload); |
---|
1236 | |
---|
1237 | }, |
---|
1238 | |
---|
1239 | /** |
---|
1240 | * Returns scrollLeft |
---|
1241 | * @method _getScrollLeft |
---|
1242 | * @private |
---|
1243 | */ |
---|
1244 | _getScrollLeft: function() { |
---|
1245 | return this._getScroll()[1]; |
---|
1246 | }, |
---|
1247 | |
---|
1248 | /** |
---|
1249 | * Returns scrollTop |
---|
1250 | * @method _getScrollTop |
---|
1251 | * @private |
---|
1252 | */ |
---|
1253 | _getScrollTop: function() { |
---|
1254 | return this._getScroll()[0]; |
---|
1255 | }, |
---|
1256 | |
---|
1257 | /** |
---|
1258 | * Returns the scrollTop and scrollLeft. Used to calculate the |
---|
1259 | * pageX and pageY in Internet Explorer |
---|
1260 | * @method _getScroll |
---|
1261 | * @private |
---|
1262 | */ |
---|
1263 | _getScroll: function() { |
---|
1264 | var dd = document.documentElement, db = document.body; |
---|
1265 | if (dd && (dd.scrollTop || dd.scrollLeft)) { |
---|
1266 | return [dd.scrollTop, dd.scrollLeft]; |
---|
1267 | } else if (db) { |
---|
1268 | return [db.scrollTop, db.scrollLeft]; |
---|
1269 | } else { |
---|
1270 | return [0, 0]; |
---|
1271 | } |
---|
1272 | }, |
---|
1273 | |
---|
1274 | /** |
---|
1275 | * Adds a DOM event directly without the caching, cleanup, scope adj, etc |
---|
1276 | * |
---|
1277 | * @param el the elment to bind the handler to |
---|
1278 | * @param {string} sType the type of event handler |
---|
1279 | * @param {function} fn the callback to invoke |
---|
1280 | * @param {boolen} capture or bubble phase |
---|
1281 | * @private |
---|
1282 | */ |
---|
1283 | _simpleAdd: function (el, sType, fn, capture) { |
---|
1284 | if (el.addEventListener) { |
---|
1285 | el.addEventListener(sType, fn, (capture)); |
---|
1286 | } else if (el.attachEvent) { |
---|
1287 | el.attachEvent("on" + sType, fn); |
---|
1288 | } |
---|
1289 | }, |
---|
1290 | |
---|
1291 | /** |
---|
1292 | * Basic remove listener |
---|
1293 | * |
---|
1294 | * @param el the elment to bind the handler to |
---|
1295 | * @param {string} sType the type of event handler |
---|
1296 | * @param {function} fn the callback to invoke |
---|
1297 | * @param {boolen} capture or bubble phase |
---|
1298 | * @private |
---|
1299 | */ |
---|
1300 | _simpleRemove: function (el, sType, fn, capture) { |
---|
1301 | if (el.removeEventListener) { |
---|
1302 | el.removeEventListener(sType, fn, (capture)); |
---|
1303 | } else if (el.detachEvent) { |
---|
1304 | el.detachEvent("on" + sType, fn); |
---|
1305 | } |
---|
1306 | } |
---|
1307 | }; |
---|
1308 | |
---|
1309 | } (); |
---|
1310 | |
---|
1311 | /** |
---|
1312 | * YAHOO.util.Event.on is an alias for addListener |
---|
1313 | * @method on |
---|
1314 | * @see addListener |
---|
1315 | */ |
---|
1316 | YAHOO.util.Event.on = YAHOO.util.Event.addListener; |
---|
1317 | |
---|
1318 | if (document && document.body) { |
---|
1319 | YAHOO.util.Event._load(); |
---|
1320 | } else { |
---|
1321 | YAHOO.util.Event._simpleAdd(window, "load", YAHOO.util.Event._load); |
---|
1322 | } |
---|
1323 | YAHOO.util.Event._simpleAdd(window, "unload", YAHOO.util.Event._unload); |
---|
1324 | YAHOO.util.Event._tryPreloadAttach(); |
---|
1325 | } |
---|
1326 | |
---|