1 | /*
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2 | Copyright (c) 2003-2009, CKSource - Frederico Knabben. All rights reserved.
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3 | For licensing, see LICENSE.html or http://ckeditor.com/license
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4 | */
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5 |
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6 | (function()
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7 | {
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8 | var blurCommand =
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9 | {
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10 | exec : function( editor )
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11 | {
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12 | editor.container.focusNext( true );
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13 | }
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14 | };
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15 |
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16 | var blurBackCommand =
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17 | {
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18 | exec : function( editor )
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19 | {
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20 | editor.container.focusPrevious( true );
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21 | }
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22 | };
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23 |
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24 | CKEDITOR.plugins.add( 'tab',
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25 | {
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26 | requires : [ 'keystrokes' ],
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27 |
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28 | init : function( editor )
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29 | {
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30 | // Register the keystrokes.
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31 | var keystrokes = editor.keystrokeHandler.keystrokes;
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32 | keystrokes[ 9 /* TAB */ ] = 'tab';
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33 | keystrokes[ CKEDITOR.SHIFT + 9 /* TAB */ ] = 'shiftTab';
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34 |
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35 | var tabSpaces = editor.config.tabSpaces,
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36 | tabText = '';
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37 |
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38 | while ( tabSpaces-- )
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39 | tabText += '\xa0';
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40 |
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41 | // Register the "tab" and "shiftTab" commands.
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42 | editor.addCommand( 'tab',
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43 | {
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44 | exec : function( editor )
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45 | {
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46 | // Fire the "tab" event, making it possible to
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47 | // customize the TAB key behavior on specific cases.
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48 | if ( !editor.fire( 'tab' ) )
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49 | {
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50 | if ( tabText.length > 0 )
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51 | editor.insertHtml( tabText );
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52 | else
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53 | {
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54 | // All browsers jump to the next field on TAB,
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55 | // except Safari, so we have to do that manually
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56 | // here.
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57 | /// https://bugs.webkit.org/show_bug.cgi?id=20597
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58 | return editor.execCommand( 'blur' );
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59 | }
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60 | }
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61 |
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62 | return true;
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63 | }
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64 | });
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65 |
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66 | editor.addCommand( 'shiftTab',
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67 | {
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68 | exec : function( editor )
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69 | {
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70 | // Fire the "tab" event, making it possible to
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71 | // customize the TAB key behavior on specific cases.
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72 | if ( !editor.fire( 'shiftTab' ) )
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73 | return editor.execCommand( 'blurBack' );
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74 |
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75 | return true;
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76 | }
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77 | });
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78 |
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79 | editor.addCommand( 'blur', blurCommand );
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80 | editor.addCommand( 'blurBack', blurBackCommand );
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81 | }
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82 | });
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83 | })();
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84 |
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85 | /**
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86 | * Moves the UI focus to the element following this element in the tabindex
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87 | * order.
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88 | * @example
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89 | * var element = CKEDITOR.document.getById( 'example' );
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90 | * element.focusNext();
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91 | */
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92 | CKEDITOR.dom.element.prototype.focusNext = function( ignoreChildren )
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93 | {
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94 | var $ = this.$,
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95 | curTabIndex = this.getTabIndex(),
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96 | passedCurrent, enteredCurrent,
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97 | elected, electedTabIndex,
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98 | element, elementTabIndex;
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99 |
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100 | if ( curTabIndex <= 0 )
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101 | {
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102 | // If this element has tabindex <= 0 then we must simply look for any
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103 | // element following it containing tabindex=0.
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104 |
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105 | element = this.getNextSourceNode( ignoreChildren, CKEDITOR.NODE_ELEMENT );
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106 |
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107 | while( element )
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108 | {
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109 | if ( element.isVisible() && element.getTabIndex() === 0 )
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110 | {
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111 | elected = element;
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112 | break;
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113 | }
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114 |
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115 | element = element.getNextSourceNode( false, CKEDITOR.NODE_ELEMENT );
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116 | }
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117 | }
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118 | else
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119 | {
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120 | // If this element has tabindex > 0 then we must look for:
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121 | // 1. An element following this element with the same tabindex.
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122 | // 2. The first element in source other with the lowest tabindex
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123 | // that is higher than this element tabindex.
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124 | // 3. The first element with tabindex=0.
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125 |
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126 | element = this.getDocument().getBody().getFirst();
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127 |
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128 | while( ( element = element.getNextSourceNode( false, CKEDITOR.NODE_ELEMENT ) ) )
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129 | {
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130 | if ( !passedCurrent )
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131 | {
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132 | if ( !enteredCurrent && element.equals( this ) )
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133 | {
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134 | enteredCurrent = true;
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135 |
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136 | // Ignore this element, if required.
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137 | if ( ignoreChildren )
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138 | {
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139 | if ( !( element = element.getNextSourceNode( true, CKEDITOR.NODE_ELEMENT ) ) )
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140 | break;
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141 | passedCurrent = 1;
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142 | }
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143 | }
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144 | else if ( enteredCurrent && !this.contains( element ) )
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145 | passedCurrent = 1;
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146 | }
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147 |
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148 | if ( !element.isVisible() || ( elementTabIndex = element.getTabIndex() ) < 0 )
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149 | continue;
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150 |
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151 | if ( passedCurrent && elementTabIndex == curTabIndex )
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152 | {
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153 | elected = element;
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154 | break;
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155 | }
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156 |
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157 | if ( elementTabIndex > curTabIndex && ( !elected || !electedTabIndex || elementTabIndex < electedTabIndex ) )
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158 | {
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159 | elected = element;
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160 | electedTabIndex = elementTabIndex;
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161 | }
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162 | else if ( !elected && elementTabIndex === 0 )
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163 | {
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164 | elected = element;
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165 | electedTabIndex = elementTabIndex;
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166 | }
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167 | }
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168 | }
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169 |
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170 | if ( elected )
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171 | elected.focus();
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172 | };
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173 |
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174 | /**
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175 | * Moves the UI focus to the element before this element in the tabindex order.
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176 | * @example
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177 | * var element = CKEDITOR.document.getById( 'example' );
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178 | * element.focusPrevious();
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179 | */
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180 | CKEDITOR.dom.element.prototype.focusPrevious = function( ignoreChildren )
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181 | {
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182 | var $ = this.$,
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183 | curTabIndex = this.getTabIndex(),
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184 | passedCurrent, enteredCurrent,
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185 | elected,
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186 | electedTabIndex = 0,
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187 | elementTabIndex;
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188 |
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189 | var element = this.getDocument().getBody().getLast();
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190 |
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191 | while( ( element = element.getPreviousSourceNode( false, CKEDITOR.NODE_ELEMENT ) ) )
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192 | {
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193 | if ( !passedCurrent )
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194 | {
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195 | if ( !enteredCurrent && element.equals( this ) )
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196 | {
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197 | enteredCurrent = true;
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198 |
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199 | // Ignore this element, if required.
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200 | if ( ignoreChildren )
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201 | {
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202 | if ( !( element = element.getPreviousSourceNode( true, CKEDITOR.NODE_ELEMENT ) ) )
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203 | break;
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204 | passedCurrent = 1;
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205 | }
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206 | }
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207 | else if ( enteredCurrent && !this.contains( element ) )
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208 | passedCurrent = 1;
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209 | }
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210 |
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211 | if ( !element.isVisible() || ( elementTabIndex = element.getTabIndex() ) < 0 )
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212 | continue;
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213 |
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214 | if ( curTabIndex <= 0 )
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215 | {
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216 | // If this element has tabindex <= 0 then we must look for:
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217 | // 1. An element before this one containing tabindex=0.
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218 | // 2. The last element with the highest tabindex.
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219 |
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220 | if ( passedCurrent && elementTabIndex === 0 )
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221 | {
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222 | elected = element;
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223 | break;
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224 | }
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225 |
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226 | if ( elementTabIndex > electedTabIndex )
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227 | {
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228 | elected = element;
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229 | electedTabIndex = elementTabIndex;
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230 | }
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231 | }
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232 | else
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233 | {
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234 | // If this element has tabindex > 0 we must look for:
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235 | // 1. An element preceeding this one, with the same tabindex.
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236 | // 2. The last element in source other with the highest tabindex
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237 | // that is lower than this element tabindex.
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238 |
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239 | if ( passedCurrent && elementTabIndex == curTabIndex )
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240 | {
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241 | elected = element;
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242 | break;
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243 | }
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244 |
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245 | if ( elementTabIndex < curTabIndex && ( !elected || elementTabIndex > electedTabIndex ) )
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246 | {
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247 | elected = element;
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248 | electedTabIndex = elementTabIndex;
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249 | }
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250 | }
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251 | }
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252 |
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253 | if ( elected )
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254 | elected.focus();
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255 | };
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256 |
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257 | /**
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258 | * Intructs the editor to add a number of spaces (&nbsp;) to the text when
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259 | * hitting the TAB key. If set to zero, the TAB key will be used to move the
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260 | * cursor focus to the next element in the page, out of the editor focus.
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261 | * @type Number
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262 | * @default 0
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263 | * @example
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264 | * config.tabSpaces = 4;
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265 | */
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266 | CKEDITOR.config.tabSpaces = 0 ;
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