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 | /**
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7 | * @file Clipboard support
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8 | */
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9 |
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10 | (function()
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11 | {
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12 | // Tries to execute any of the paste, cut or copy commands in IE. Returns a
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13 | // boolean indicating that the operation succeeded.
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14 | var execIECommand = function( editor, command )
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15 | {
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16 | var doc = editor.document,
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17 | body = doc.getBody();
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18 |
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19 | var enabled = false;
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20 | var onExec = function()
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21 | {
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22 | enabled = true;
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23 | };
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24 |
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25 | // The following seems to be the only reliable way to detect that
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26 | // clipboard commands are enabled in IE. It will fire the
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27 | // onpaste/oncut/oncopy events only if the security settings allowed
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28 | // the command to execute.
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29 | body.on( command, onExec );
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30 |
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31 | doc.$.execCommand( command );
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32 |
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33 | body.removeListener( command, onExec );
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34 |
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35 | return enabled;
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36 | };
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37 |
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38 | // Attempts to execute the Cut and Copy operations.
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39 | var tryToCutCopy =
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40 | CKEDITOR.env.ie ?
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41 | function( editor, type )
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42 | {
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43 | return execIECommand( editor, type );
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44 | }
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45 | : // !IE.
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46 | function( editor, type )
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47 | {
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48 | try
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49 | {
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50 | // Other browsers throw an error if the command is disabled.
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51 | return editor.document.$.execCommand( type );
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52 | }
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53 | catch( e )
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54 | {
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55 | return false;
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56 | }
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57 | };
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58 |
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59 | // A class that represents one of the cut or copy commands.
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60 | var cutCopyCmd = function( type )
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61 | {
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62 | this.type = type;
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63 | this.canUndo = ( this.type == 'cut' ); // We can't undo copy to clipboard.
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64 | };
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65 |
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66 | cutCopyCmd.prototype =
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67 | {
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68 | exec : function( editor, data )
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69 | {
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70 | var success = tryToCutCopy( editor, this.type );
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71 |
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72 | if ( !success )
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73 | alert( editor.lang.clipboard[ this.type + 'Error' ] ); // Show cutError or copyError.
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74 |
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75 | return success;
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76 | }
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77 | };
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78 |
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79 | // Paste command.
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80 | var pasteCmd =
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81 | CKEDITOR.env.ie ?
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82 | {
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83 | exec : function( editor, data )
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84 | {
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85 | // Prevent IE from pasting at the begining of the document.
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86 | editor.focus();
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87 |
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88 | if ( !editor.fire( 'beforePaste' )
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89 | && !execIECommand( editor, 'paste' ) )
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90 | {
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91 | editor.openDialog( 'paste' );
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92 | }
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93 | }
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94 | }
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95 | :
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96 | {
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97 | exec : function( editor )
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98 | {
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99 | try
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100 | {
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101 | if ( !editor.fire( 'beforePaste' )
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102 | && !editor.document.$.execCommand( 'Paste', false, null ) )
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103 | {
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104 | throw 0;
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105 | }
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106 | }
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107 | catch ( e )
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108 | {
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109 | // Open the paste dialog.
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110 | editor.openDialog( 'paste' );
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111 | }
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112 | }
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113 | };
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114 |
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115 | // Listens for some clipboard related keystrokes, so they get customized.
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116 | var onKey = function( event )
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117 | {
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118 | switch ( event.data.keyCode )
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119 | {
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120 | // Paste
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121 | case CKEDITOR.CTRL + 86 : // CTRL+V
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122 | case CKEDITOR.SHIFT + 45 : // SHIFT+INS
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123 |
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124 | var editor = this;
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125 | editor.fire( 'saveSnapshot' ); // Save before paste
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126 |
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127 | if ( editor.fire( 'beforePaste' ) )
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128 | event.cancel();
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129 |
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130 | setTimeout( function()
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131 | {
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132 | editor.fire( 'saveSnapshot' ); // Save after paste
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133 | }, 0 );
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134 | return;
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135 |
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136 | // Cut
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137 | case CKEDITOR.CTRL + 88 : // CTRL+X
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138 | case CKEDITOR.SHIFT + 46 : // SHIFT+DEL
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139 |
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140 | // Save Undo snapshot.
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141 | editor = this;
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142 | editor.fire( 'saveSnapshot' ); // Save before paste
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143 | setTimeout( function()
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144 | {
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145 | editor.fire( 'saveSnapshot' ); // Save after paste
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146 | }, 0 );
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147 | }
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148 | };
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149 |
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150 | // Register the plugin.
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151 | CKEDITOR.plugins.add( 'clipboard',
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152 | {
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153 | init : function( editor )
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154 | {
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155 | function addButtonCommand( buttonName, commandName, command, ctxMenuOrder )
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156 | {
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157 | var lang = editor.lang[ commandName ];
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158 |
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159 | editor.addCommand( commandName, command );
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160 | editor.ui.addButton( buttonName,
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161 | {
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162 | label : lang,
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163 | command : commandName
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164 | });
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165 |
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166 | // If the "menu" plugin is loaded, register the menu item.
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167 | if ( editor.addMenuItems )
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168 | {
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169 | editor.addMenuItem( commandName,
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170 | {
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171 | label : lang,
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172 | command : commandName,
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173 | group : 'clipboard',
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174 | order : ctxMenuOrder
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175 | });
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176 | }
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177 | }
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178 |
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179 | addButtonCommand( 'Cut', 'cut', new cutCopyCmd( 'cut' ), 1 );
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180 | addButtonCommand( 'Copy', 'copy', new cutCopyCmd( 'copy' ), 4 );
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181 | addButtonCommand( 'Paste', 'paste', pasteCmd, 8 );
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182 |
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183 | CKEDITOR.dialog.add( 'paste', CKEDITOR.getUrl( this.path + 'dialogs/paste.js' ) );
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184 |
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185 | editor.on( 'key', onKey, editor );
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186 |
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187 | // If the "contextmenu" plugin is loaded, register the listeners.
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188 | if ( editor.contextMenu )
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189 | {
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190 | function stateFromNamedCommand( command )
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191 | {
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192 | return editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
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193 | }
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194 |
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195 | editor.contextMenu.addListener( function()
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196 | {
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197 | return {
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198 | cut : stateFromNamedCommand( 'Cut' ),
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199 |
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200 | // Browser bug: 'Cut' has the correct states for both Copy and Cut.
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201 | copy : stateFromNamedCommand( 'Cut' ),
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202 | paste : CKEDITOR.env.webkit ? CKEDITOR.TRISTATE_OFF : stateFromNamedCommand( 'Paste' )
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203 | };
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204 | });
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205 | }
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206 | }
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207 | });
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208 | })();
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