1 | /*! |
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2 | * jQuery UI Autocomplete 1.9.0 |
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3 | * http://jqueryui.com |
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4 | * |
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5 | * Copyright 2012 jQuery Foundation and other contributors |
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6 | * Released under the MIT license. |
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7 | * http://jquery.org/license |
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8 | * |
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9 | * http://api.jqueryui.com/autocomplete/ |
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10 | * |
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11 | * Depends: |
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12 | * jquery.ui.core.js |
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13 | * jquery.ui.widget.js |
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14 | * jquery.ui.position.js |
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15 | * jquery.ui.menu.js |
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16 | */ |
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17 | (function( $, undefined ) { |
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18 | |
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19 | // used to prevent race conditions with remote data sources |
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20 | var requestIndex = 0; |
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21 | |
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22 | $.widget( "ui.autocomplete", { |
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23 | version: "1.9.0", |
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24 | defaultElement: "<input>", |
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25 | options: { |
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26 | appendTo: "body", |
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27 | autoFocus: false, |
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28 | delay: 300, |
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29 | minLength: 1, |
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30 | position: { |
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31 | my: "left top", |
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32 | at: "left bottom", |
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33 | collision: "none" |
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34 | }, |
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35 | source: null, |
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36 | |
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37 | // callbacks |
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38 | change: null, |
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39 | close: null, |
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40 | focus: null, |
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41 | open: null, |
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42 | response: null, |
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43 | search: null, |
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44 | select: null |
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45 | }, |
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46 | |
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47 | pending: 0, |
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48 | |
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49 | _create: function() { |
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50 | // Some browsers only repeat keydown events, not keypress events, |
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51 | // so we use the suppressKeyPress flag to determine if we've already |
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52 | // handled the keydown event. #7269 |
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53 | // Unfortunately the code for & in keypress is the same as the up arrow, |
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54 | // so we use the suppressKeyPressRepeat flag to avoid handling keypress |
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55 | // events when we know the keydown event was used to modify the |
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56 | // search term. #7799 |
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57 | var suppressKeyPress, suppressKeyPressRepeat, suppressInput; |
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58 | |
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59 | this.isMultiLine = this._isMultiLine(); |
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60 | this.valueMethod = this.element[ this.element.is( "input,textarea" ) ? "val" : "text" ]; |
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61 | this.isNewMenu = true; |
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62 | |
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63 | this.element |
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64 | .addClass( "ui-autocomplete-input" ) |
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65 | .attr( "autocomplete", "off" ); |
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66 | |
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67 | this._on({ |
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68 | keydown: function( event ) { |
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69 | if ( this.element.prop( "readOnly" ) ) { |
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70 | suppressKeyPress = true; |
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71 | suppressInput = true; |
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72 | suppressKeyPressRepeat = true; |
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73 | return; |
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74 | } |
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75 | |
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76 | suppressKeyPress = false; |
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77 | suppressInput = false; |
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78 | suppressKeyPressRepeat = false; |
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79 | var keyCode = $.ui.keyCode; |
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80 | switch( event.keyCode ) { |
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81 | case keyCode.PAGE_UP: |
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82 | suppressKeyPress = true; |
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83 | this._move( "previousPage", event ); |
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84 | break; |
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85 | case keyCode.PAGE_DOWN: |
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86 | suppressKeyPress = true; |
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87 | this._move( "nextPage", event ); |
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88 | break; |
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89 | case keyCode.UP: |
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90 | suppressKeyPress = true; |
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91 | this._keyEvent( "previous", event ); |
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92 | break; |
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93 | case keyCode.DOWN: |
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94 | suppressKeyPress = true; |
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95 | this._keyEvent( "next", event ); |
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96 | break; |
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97 | case keyCode.ENTER: |
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98 | case keyCode.NUMPAD_ENTER: |
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99 | // when menu is open and has focus |
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100 | if ( this.menu.active ) { |
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101 | // #6055 - Opera still allows the keypress to occur |
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102 | // which causes forms to submit |
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103 | suppressKeyPress = true; |
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104 | event.preventDefault(); |
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105 | this.menu.select( event ); |
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106 | } |
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107 | break; |
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108 | case keyCode.TAB: |
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109 | if ( this.menu.active ) { |
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110 | this.menu.select( event ); |
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111 | } |
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112 | break; |
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113 | case keyCode.ESCAPE: |
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114 | if ( this.menu.element.is( ":visible" ) ) { |
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115 | this._value( this.term ); |
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116 | this.close( event ); |
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117 | // Different browsers have different default behavior for escape |
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118 | // Single press can mean undo or clear |
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119 | // Double press in IE means clear the whole form |
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120 | event.preventDefault(); |
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121 | } |
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122 | break; |
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123 | default: |
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124 | suppressKeyPressRepeat = true; |
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125 | // search timeout should be triggered before the input value is changed |
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126 | this._searchTimeout( event ); |
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127 | break; |
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128 | } |
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129 | }, |
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130 | keypress: function( event ) { |
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131 | if ( suppressKeyPress ) { |
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132 | suppressKeyPress = false; |
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133 | event.preventDefault(); |
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134 | return; |
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135 | } |
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136 | if ( suppressKeyPressRepeat ) { |
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137 | return; |
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138 | } |
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139 | |
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140 | // replicate some key handlers to allow them to repeat in Firefox and Opera |
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141 | var keyCode = $.ui.keyCode; |
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142 | switch( event.keyCode ) { |
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143 | case keyCode.PAGE_UP: |
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144 | this._move( "previousPage", event ); |
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145 | break; |
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146 | case keyCode.PAGE_DOWN: |
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147 | this._move( "nextPage", event ); |
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148 | break; |
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149 | case keyCode.UP: |
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150 | this._keyEvent( "previous", event ); |
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151 | break; |
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152 | case keyCode.DOWN: |
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153 | this._keyEvent( "next", event ); |
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154 | break; |
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155 | } |
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156 | }, |
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157 | input: function( event ) { |
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158 | if ( suppressInput ) { |
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159 | suppressInput = false; |
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160 | event.preventDefault(); |
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161 | return; |
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162 | } |
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163 | this._searchTimeout( event ); |
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164 | }, |
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165 | focus: function() { |
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166 | this.selectedItem = null; |
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167 | this.previous = this._value(); |
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168 | }, |
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169 | blur: function( event ) { |
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170 | if ( this.cancelBlur ) { |
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171 | delete this.cancelBlur; |
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172 | return; |
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173 | } |
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174 | |
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175 | clearTimeout( this.searching ); |
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176 | this.close( event ); |
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177 | this._change( event ); |
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178 | } |
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179 | }); |
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180 | |
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181 | this._initSource(); |
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182 | this.menu = $( "<ul>" ) |
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183 | .addClass( "ui-autocomplete" ) |
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184 | .appendTo( this.document.find( this.options.appendTo || "body" )[ 0 ] ) |
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185 | .menu({ |
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186 | // custom key handling for now |
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187 | input: $(), |
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188 | // disable ARIA support, the live region takes care of that |
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189 | role: null |
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190 | }) |
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191 | .zIndex( this.element.zIndex() + 1 ) |
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192 | .hide() |
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193 | .data( "menu" ); |
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194 | this._on( this.menu.element, { |
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195 | mousedown: function( event ) { |
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196 | // prevent moving focus out of the text field |
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197 | event.preventDefault(); |
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198 | |
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199 | // IE doesn't prevent moving focus even with event.preventDefault() |
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200 | // so we set a flag to know when we should ignore the blur event |
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201 | this.cancelBlur = true; |
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202 | this._delay(function() { |
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203 | delete this.cancelBlur; |
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204 | }); |
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205 | |
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206 | // clicking on the scrollbar causes focus to shift to the body |
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207 | // but we can't detect a mouseup or a click immediately afterward |
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208 | // so we have to track the next mousedown and close the menu if |
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209 | // the user clicks somewhere outside of the autocomplete |
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210 | var menuElement = this.menu.element[ 0 ]; |
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211 | if ( !$( event.target ).closest( ".ui-menu-item" ).length ) { |
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212 | this._delay(function() { |
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213 | var that = this; |
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214 | this.document.one( "mousedown", function( event ) { |
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215 | if ( event.target !== that.element[ 0 ] && |
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216 | event.target !== menuElement && |
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217 | !$.contains( menuElement, event.target ) ) { |
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218 | that.close(); |
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219 | } |
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220 | }); |
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221 | }); |
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222 | } |
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223 | }, |
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224 | menufocus: function( event, ui ) { |
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225 | // #7024 - Prevent accidental activation of menu items in Firefox |
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226 | if ( this.isNewMenu ) { |
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227 | this.isNewMenu = false; |
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228 | if ( event.originalEvent && /^mouse/.test( event.originalEvent.type ) ) { |
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229 | this.menu.blur(); |
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230 | |
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231 | this.document.one( "mousemove", function() { |
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232 | $( event.target ).trigger( event.originalEvent ); |
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233 | }); |
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234 | |
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235 | return; |
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236 | } |
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237 | } |
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238 | |
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239 | // back compat for _renderItem using item.autocomplete, via #7810 |
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240 | // TODO remove the fallback, see #8156 |
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241 | var item = ui.item.data( "ui-autocomplete-item" ) || ui.item.data( "item.autocomplete" ); |
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242 | if ( false !== this._trigger( "focus", event, { item: item } ) ) { |
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243 | // use value to match what will end up in the input, if it was a key event |
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244 | if ( event.originalEvent && /^key/.test( event.originalEvent.type ) ) { |
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245 | this._value( item.value ); |
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246 | } |
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247 | } else { |
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248 | // Normally the input is populated with the item's value as the |
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249 | // menu is navigated, causing screen readers to notice a change and |
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250 | // announce the item. Since the focus event was canceled, this doesn't |
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251 | // happen, so we update the live region so that screen readers can |
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252 | // still notice the change and announce it. |
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253 | this.liveRegion.text( item.value ); |
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254 | } |
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255 | }, |
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256 | menuselect: function( event, ui ) { |
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257 | // back compat for _renderItem using item.autocomplete, via #7810 |
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258 | // TODO remove the fallback, see #8156 |
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259 | var item = ui.item.data( "ui-autocomplete-item" ) || ui.item.data( "item.autocomplete" ), |
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260 | previous = this.previous; |
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261 | |
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262 | // only trigger when focus was lost (click on menu) |
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263 | if ( this.element[0] !== this.document[0].activeElement ) { |
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264 | this.element.focus(); |
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265 | this.previous = previous; |
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266 | // #6109 - IE triggers two focus events and the second |
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267 | // is asynchronous, so we need to reset the previous |
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268 | // term synchronously and asynchronously :-( |
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269 | this._delay(function() { |
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270 | this.previous = previous; |
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271 | this.selectedItem = item; |
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272 | }); |
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273 | } |
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274 | |
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275 | if ( false !== this._trigger( "select", event, { item: item } ) ) { |
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276 | this._value( item.value ); |
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277 | } |
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278 | // reset the term after the select event |
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279 | // this allows custom select handling to work properly |
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280 | this.term = this._value(); |
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281 | |
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282 | this.close( event ); |
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283 | this.selectedItem = item; |
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284 | } |
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285 | }); |
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286 | |
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287 | this.liveRegion = $( "<span>", { |
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288 | role: "status", |
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289 | "aria-live": "polite" |
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290 | }) |
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291 | .addClass( "ui-helper-hidden-accessible" ) |
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292 | .insertAfter( this.element ); |
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293 | |
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294 | if ( $.fn.bgiframe ) { |
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295 | this.menu.element.bgiframe(); |
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296 | } |
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297 | |
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298 | // turning off autocomplete prevents the browser from remembering the |
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299 | // value when navigating through history, so we re-enable autocomplete |
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300 | // if the page is unloaded before the widget is destroyed. #7790 |
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301 | this._on( this.window, { |
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302 | beforeunload: function() { |
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303 | this.element.removeAttr( "autocomplete" ); |
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304 | } |
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305 | }); |
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306 | }, |
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307 | |
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308 | _destroy: function() { |
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309 | clearTimeout( this.searching ); |
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310 | this.element |
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311 | .removeClass( "ui-autocomplete-input" ) |
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312 | .removeAttr( "autocomplete" ); |
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313 | this.menu.element.remove(); |
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314 | this.liveRegion.remove(); |
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315 | }, |
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316 | |
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317 | _setOption: function( key, value ) { |
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318 | this._super( key, value ); |
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319 | if ( key === "source" ) { |
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320 | this._initSource(); |
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321 | } |
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322 | if ( key === "appendTo" ) { |
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323 | this.menu.element.appendTo( this.document.find( value || "body" )[0] ); |
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324 | } |
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325 | if ( key === "disabled" && value && this.xhr ) { |
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326 | this.xhr.abort(); |
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327 | } |
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328 | }, |
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329 | |
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330 | _isMultiLine: function() { |
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331 | // Textareas are always multi-line |
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332 | if ( this.element.is( "textarea" ) ) { |
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333 | return true; |
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334 | } |
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335 | // Inputs are always single-line, even if inside a contentEditable element |
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336 | // IE also treats inputs as contentEditable |
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337 | if ( this.element.is( "input" ) ) { |
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338 | return false; |
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339 | } |
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340 | // All other element types are determined by whether or not they're contentEditable |
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341 | return this.element.prop( "isContentEditable" ); |
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342 | }, |
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343 | |
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344 | _initSource: function() { |
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345 | var array, url, |
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346 | that = this; |
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347 | if ( $.isArray(this.options.source) ) { |
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348 | array = this.options.source; |
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349 | this.source = function( request, response ) { |
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350 | response( $.ui.autocomplete.filter( array, request.term ) ); |
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351 | }; |
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352 | } else if ( typeof this.options.source === "string" ) { |
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353 | url = this.options.source; |
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354 | this.source = function( request, response ) { |
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355 | if ( that.xhr ) { |
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356 | that.xhr.abort(); |
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357 | } |
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358 | that.xhr = $.ajax({ |
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359 | url: url, |
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360 | data: request, |
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361 | dataType: "json", |
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362 | success: function( data, status ) { |
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363 | response( data ); |
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364 | }, |
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365 | error: function() { |
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366 | response( [] ); |
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367 | } |
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368 | }); |
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369 | }; |
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370 | } else { |
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371 | this.source = this.options.source; |
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372 | } |
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373 | }, |
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374 | |
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375 | _searchTimeout: function( event ) { |
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376 | clearTimeout( this.searching ); |
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377 | this.searching = this._delay(function() { |
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378 | // only search if the value has changed |
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379 | if ( this.term !== this._value() ) { |
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380 | this.selectedItem = null; |
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381 | this.search( null, event ); |
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382 | } |
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383 | }, this.options.delay ); |
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384 | }, |
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385 | |
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386 | search: function( value, event ) { |
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387 | value = value != null ? value : this._value(); |
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388 | |
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389 | // always save the actual value, not the one passed as an argument |
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390 | this.term = this._value(); |
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391 | |
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392 | if ( value.length < this.options.minLength ) { |
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393 | return this.close( event ); |
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394 | } |
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395 | |
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396 | if ( this._trigger( "search", event ) === false ) { |
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397 | return; |
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398 | } |
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399 | |
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400 | return this._search( value ); |
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401 | }, |
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402 | |
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403 | _search: function( value ) { |
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404 | this.pending++; |
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405 | this.element.addClass( "ui-autocomplete-loading" ); |
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406 | this.cancelSearch = false; |
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407 | |
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408 | this.source( { term: value }, this._response() ); |
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409 | }, |
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410 | |
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411 | _response: function() { |
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412 | var that = this, |
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413 | index = ++requestIndex; |
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414 | |
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415 | return function( content ) { |
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416 | if ( index === requestIndex ) { |
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417 | that.__response( content ); |
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418 | } |
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419 | |
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420 | that.pending--; |
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421 | if ( !that.pending ) { |
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422 | that.element.removeClass( "ui-autocomplete-loading" ); |
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423 | } |
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424 | }; |
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425 | }, |
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426 | |
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427 | __response: function( content ) { |
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428 | if ( content ) { |
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429 | content = this._normalize( content ); |
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430 | } |
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431 | this._trigger( "response", null, { content: content } ); |
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432 | if ( !this.options.disabled && content && content.length && !this.cancelSearch ) { |
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433 | this._suggest( content ); |
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434 | this._trigger( "open" ); |
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435 | } else { |
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436 | // use ._close() instead of .close() so we don't cancel future searches |
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437 | this._close(); |
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438 | } |
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439 | }, |
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440 | |
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441 | close: function( event ) { |
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442 | this.cancelSearch = true; |
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443 | this._close( event ); |
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444 | }, |
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445 | |
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446 | _close: function( event ) { |
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447 | if ( this.menu.element.is( ":visible" ) ) { |
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448 | this.menu.element.hide(); |
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449 | this.menu.blur(); |
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450 | this.isNewMenu = true; |
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451 | this._trigger( "close", event ); |
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452 | } |
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453 | }, |
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454 | |
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455 | _change: function( event ) { |
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456 | if ( this.previous !== this._value() ) { |
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457 | this._trigger( "change", event, { item: this.selectedItem } ); |
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458 | } |
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459 | }, |
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460 | |
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461 | _normalize: function( items ) { |
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462 | // assume all items have the right format when the first item is complete |
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463 | if ( items.length && items[0].label && items[0].value ) { |
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464 | return items; |
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465 | } |
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466 | return $.map( items, function( item ) { |
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467 | if ( typeof item === "string" ) { |
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468 | return { |
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469 | label: item, |
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470 | value: item |
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471 | }; |
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472 | } |
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473 | return $.extend({ |
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474 | label: item.label || item.value, |
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475 | value: item.value || item.label |
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476 | }, item ); |
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477 | }); |
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478 | }, |
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479 | |
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480 | _suggest: function( items ) { |
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481 | var ul = this.menu.element |
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482 | .empty() |
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483 | .zIndex( this.element.zIndex() + 1 ); |
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484 | this._renderMenu( ul, items ); |
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485 | this.menu.refresh(); |
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486 | |
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487 | // size and position menu |
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488 | ul.show(); |
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489 | this._resizeMenu(); |
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490 | ul.position( $.extend({ |
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491 | of: this.element |
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492 | }, this.options.position )); |
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493 | |
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494 | if ( this.options.autoFocus ) { |
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495 | this.menu.next(); |
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496 | } |
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497 | }, |
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498 | |
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499 | _resizeMenu: function() { |
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500 | var ul = this.menu.element; |
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501 | ul.outerWidth( Math.max( |
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502 | // Firefox wraps long text (possibly a rounding bug) |
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503 | // so we add 1px to avoid the wrapping (#7513) |
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504 | ul.width( "" ).outerWidth() + 1, |
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505 | this.element.outerWidth() |
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506 | ) ); |
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507 | }, |
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508 | |
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509 | _renderMenu: function( ul, items ) { |
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510 | var that = this; |
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511 | $.each( items, function( index, item ) { |
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512 | that._renderItemData( ul, item ); |
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513 | }); |
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514 | }, |
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515 | |
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516 | _renderItemData: function( ul, item ) { |
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517 | return this._renderItem( ul, item ).data( "ui-autocomplete-item", item ); |
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518 | }, |
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519 | |
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520 | _renderItem: function( ul, item ) { |
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521 | return $( "<li>" ) |
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522 | .append( $( "<a>" ).text( item.label ) ) |
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523 | .appendTo( ul ); |
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524 | }, |
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525 | |
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526 | _move: function( direction, event ) { |
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527 | if ( !this.menu.element.is( ":visible" ) ) { |
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528 | this.search( null, event ); |
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529 | return; |
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530 | } |
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531 | if ( this.menu.isFirstItem() && /^previous/.test( direction ) || |
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532 | this.menu.isLastItem() && /^next/.test( direction ) ) { |
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533 | this._value( this.term ); |
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534 | this.menu.blur(); |
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535 | return; |
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536 | } |
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537 | this.menu[ direction ]( event ); |
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538 | }, |
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539 | |
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540 | widget: function() { |
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541 | return this.menu.element; |
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542 | }, |
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543 | |
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544 | _value: function( value ) { |
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545 | return this.valueMethod.apply( this.element, arguments ); |
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546 | }, |
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547 | |
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548 | _keyEvent: function( keyEvent, event ) { |
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549 | if ( !this.isMultiLine || this.menu.element.is( ":visible" ) ) { |
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550 | this._move( keyEvent, event ); |
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551 | |
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552 | // prevents moving cursor to beginning/end of the text field in some browsers |
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553 | event.preventDefault(); |
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554 | } |
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555 | } |
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556 | }); |
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557 | |
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558 | $.extend( $.ui.autocomplete, { |
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559 | escapeRegex: function( value ) { |
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560 | return value.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&"); |
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561 | }, |
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562 | filter: function(array, term) { |
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563 | var matcher = new RegExp( $.ui.autocomplete.escapeRegex(term), "i" ); |
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564 | return $.grep( array, function(value) { |
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565 | return matcher.test( value.label || value.value || value ); |
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566 | }); |
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567 | } |
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568 | }); |
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569 | |
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570 | |
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571 | // live region extension, adding a `messages` option |
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572 | // NOTE: This is an experimental API. We are still investigating |
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573 | // a full solution for string manipulation and internationalization. |
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574 | $.widget( "ui.autocomplete", $.ui.autocomplete, { |
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575 | options: { |
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576 | messages: { |
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577 | noResults: "No search results.", |
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578 | results: function( amount ) { |
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579 | return amount + ( amount > 1 ? " results are" : " result is" ) + |
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580 | " available, use up and down arrow keys to navigate."; |
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581 | } |
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582 | } |
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583 | }, |
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584 | |
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585 | __response: function( content ) { |
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586 | var message; |
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587 | this._superApply( arguments ); |
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588 | if ( this.options.disabled || this.cancelSearch ) { |
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589 | return; |
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590 | } |
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591 | if ( content && content.length ) { |
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592 | message = this.options.messages.results( content.length ); |
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593 | } else { |
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594 | message = this.options.messages.noResults; |
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595 | } |
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596 | this.liveRegion.text( message ); |
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597 | } |
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598 | }); |
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599 | |
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600 | |
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601 | }( jQuery )); |
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