_source/plugins/clipboard/plugin.js

   1 /*
   2 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
   3 For licensing, see LICENSE.html or http://ckeditor.com/license
   4 */
   5
   6 /**
   7  * @file Clipboard support
   8  */
   9
  10 (function()
  11 {
  12         // Tries to execute any of the paste, cut or copy commands in IE. Returns a
  13         // boolean indicating that the operation succeeded.
  14         var execIECommand = function( editor, command )
  15         {
  16                 var doc = editor.document,
  17                         body = doc.getBody();
  18
  19                 var enabled = 0;
  20                 var onExec = function()
  21                 {
  22                         enabled = 1;
  23                 };
  24
  25                 // The following seems to be the only reliable way to detect that
  26                 // clipboard commands are enabled in IE. It will fire the
  27                 // onpaste/oncut/oncopy events only if the security settings allowed
  28                 // the command to execute.
  29                 body.on( command, onExec );
  30
  31                 // IE6/7: document.execCommand has problem to paste into positioned element.
  32                 ( CKEDITOR.env.version > 7 ? doc.$ : doc.$.selection.createRange() ) [ 'execCommand' ]( command );
  33
  34                 body.removeListener( command, onExec );
  35
  36                 return enabled;
  37         };
  38
  39         // Attempts to execute the Cut and Copy operations.
  40         var tryToCutCopy =
  41                 CKEDITOR.env.ie ?
  42                         function( editor, type )
  43                         {
  44                                 return execIECommand( editor, type );
  45                         }
  46                 :               // !IE.
  47                         function( editor, type )
  48                         {
  49                                 try
  50                                 {
  51                                         // Other browsers throw an error if the command is disabled.
  52                                         return editor.document.$.execCommand( type, false, null );
  53                                 }
  54                                 catch( e )
  55                                 {
  56                                         return false;
  57                                 }
  58                         };
  59
  60         // A class that represents one of the cut or copy commands.
  61         var cutCopyCmd = function( type )
  62         {
  63                 this.type = type;
  64                 this.canUndo = this.type == 'cut';              // We can't undo copy to clipboard.
  65                 this.startDisabled = true;
  66         };
  67
  68         cutCopyCmd.prototype =
  69         {
  70                 exec : function( editor, data )
  71                 {
  72                         this.type == 'cut' && fixCut( editor );
  73
  74                         var success = tryToCutCopy( editor, this.type );
  75
  76                         if ( !success )
  77                                 alert( editor.lang.clipboard[ this.type + 'Error' ] );          // Show cutError or copyError.
  78
  79                         return success;
  80                 }
  81         };
  82
  83         // Paste command.
  84         var pasteCmd =
  85         {
  86                 canUndo : false,
  87
  88                 exec :
  89                         CKEDITOR.env.ie ?
  90                                 function( editor )
  91                                 {
  92                                         // Prevent IE from pasting at the begining of the document.
  93                                         editor.focus();
  94
  95                                         if ( !editor.document.getBody().fire( 'beforepaste' )
  96                                                  && !execIECommand( editor, 'paste' ) )
  97                                         {
  98                                                 editor.fire( 'pasteDialog' );
  99                                                 return false;
 100                                         }
 101                                 }
 102                         :
 103                                 function( editor )
 104                                 {
 105                                         try
 106                                         {
 107                                                 if ( !editor.document.getBody().fire( 'beforepaste' )
 108                                                          && !editor.document.$.execCommand( 'Paste', false, null ) )
 109                                                 {
 110                                                         throw 0;
 111                                                 }
 112                                         }
 113                                         catch ( e )
 114                                         {
 115                                                 setTimeout( function()
 116                                                         {
 117                                                                 editor.fire( 'pasteDialog' );
 118                                                         }, 0 );
 119                                                 return false;
 120                                         }
 121                                 }
 122         };
 123
 124         // Listens for some clipboard related keystrokes, so they get customized.
 125         var onKey = function( event )
 126         {
 127                 if ( this.mode != 'wysiwyg' )
 128                         return;
 129
 130                 switch ( event.data.keyCode )
 131                 {
 132                         // Paste
 133                         case CKEDITOR.CTRL + 86 :               // CTRL+V
 134                         case CKEDITOR.SHIFT + 45 :              // SHIFT+INS
 135
 136                                 var body = this.document.getBody();
 137
 138                                 // Simulate 'beforepaste' event for all none-IEs.
 139                                 if ( !CKEDITOR.env.ie && body.fire( 'beforepaste' ) )
 140                                         event.cancel();
 141                                 // Simulate 'paste' event for Opera/Firefox2.
 142                                 else if ( CKEDITOR.env.opera
 143                                                  || CKEDITOR.env.gecko && CKEDITOR.env.version < 10900 )
 144                                         body.fire( 'paste' );
 145                                 return;
 146
 147                         // Cut
 148                         case CKEDITOR.CTRL + 88 :               // CTRL+X
 149                         case CKEDITOR.SHIFT + 46 :              // SHIFT+DEL
 150
 151                                 // Save Undo snapshot.
 152                                 var editor = this;
 153                                 this.fire( 'saveSnapshot' );            // Save before paste
 154                                 setTimeout( function()
 155                                         {
 156                                                 editor.fire( 'saveSnapshot' );          // Save after paste
 157                                         }, 0 );
 158                 }
 159         };
 160
 161         function cancel( evt ) { evt.cancel(); }
 162
 163         // Allow to peek clipboard content by redirecting the
 164         // pasting content into a temporary bin and grab the content of it.
 165         function getClipboardData( evt, mode, callback )
 166         {
 167                 var doc = this.document;
 168
 169                 // Avoid recursions on 'paste' event or consequent paste too fast. (#5730)
 170                 if ( doc.getById( 'cke_pastebin' ) )
 171                         return;
 172
 173                 // If the browser supports it, get the data directly
 174                 if ( mode == 'text' && evt.data && evt.data.$.clipboardData )
 175                 {
 176                         // evt.data.$.clipboardData.types contains all the flavours in Mac's Safari, but not on windows.
 177                         var plain = evt.data.$.clipboardData.getData( 'text/plain' );
 178                         if ( plain )
 179                         {
 180                                 evt.data.preventDefault();
 181                                 callback( plain );
 182                                 return;
 183                         }
 184                 }
 185
 186                 var sel = this.getSelection(),
 187                         range = new CKEDITOR.dom.range( doc );
 188
 189                 // Create container to paste into
 190                 var pastebin = new CKEDITOR.dom.element( mode == 'text' ? 'textarea' : CKEDITOR.env.webkit ? 'body' : 'div', doc );
 191                 pastebin.setAttribute( 'id', 'cke_pastebin' );
 192                 // Safari requires a filler node inside the div to have the content pasted into it. (#4882)
 193                 CKEDITOR.env.webkit && pastebin.append( doc.createText( '\xa0' ) );
 194                 doc.getBody().append( pastebin );
 195
 196                 pastebin.setStyles(
 197                         {
 198                                 position : 'absolute',
 199                                 // Position the bin exactly at the position of the selected element
 200                                 // to avoid any subsequent document scroll.
 201                                 top : sel.getStartElement().getDocumentPosition().y + 'px',
 202                                 width : '1px',
 203                                 height : '1px',
 204                                 overflow : 'hidden'
 205                         });
 206
 207                 // It's definitely a better user experience if we make the paste-bin pretty unnoticed
 208                 // by pulling it off the screen.
 209                 pastebin.setStyle( this.config.contentsLangDirection == 'ltr' ? 'left' : 'right', '-1000px' );
 210
 211                 var bms = sel.createBookmarks();
 212
 213                 this.on( 'selectionChange', cancel, null, null, 0 );
 214
 215                 // Turn off design mode temporarily before give focus to the paste bin.
 216                 if ( mode == 'text' )
 217                         pastebin.$.focus();
 218                 else
 219                 {
 220                         range.setStartAt( pastebin, CKEDITOR.POSITION_AFTER_START );
 221                         range.setEndAt( pastebin, CKEDITOR.POSITION_BEFORE_END );
 222                         range.select( true );
 223                 }
 224
 225                 var editor  = this;
 226                 // Wait a while and grab the pasted contents
 227                 window.setTimeout( function()
 228                 {
 229                         mode == 'text' && CKEDITOR.env.gecko && editor.focusGrabber.focus();
 230                         pastebin.remove();
 231                         editor.removeListener( 'selectionChange', cancel );
 232
 233                         // Grab the HTML contents.
 234                         // We need to look for a apple style wrapper on webkit it also adds
 235                         // a div wrapper if you copy/paste the body of the editor.
 236                         // Remove hidden div and restore selection.
 237                         var bogusSpan;
 238                         pastebin = ( CKEDITOR.env.webkit
 239                                                  && ( bogusSpan = pastebin.getFirst() )
 240                                                  && ( bogusSpan.is && bogusSpan.hasClass( 'Apple-style-span' ) ) ?
 241                                                         bogusSpan : pastebin );
 242
 243                         sel.selectBookmarks( bms );
 244                         callback( pastebin[ 'get' + ( mode == 'text' ? 'Value' : 'Html' ) ]() );
 245                 }, 0 );
 246         }
 247
 248         // Cutting off control type element in IE standards breaks the selection entirely. (#4881)
 249         function fixCut( editor )
 250         {
 251                 if ( !CKEDITOR.env.ie || CKEDITOR.env.quirks )
 252                         return;
 253
 254                 var sel = editor.getSelection();
 255                 var control;
 256                 if( ( sel.getType() == CKEDITOR.SELECTION_ELEMENT ) && ( control = sel.getSelectedElement() ) )
 257                 {
 258                         var range = sel.getRanges()[ 0 ];
 259                         var dummy = editor.document.createText( '' );
 260                         dummy.insertBefore( control );
 261                         range.setStartBefore( dummy );
 262                         range.setEndAfter( control );
 263                         sel.selectRanges( [ range ] );
 264
 265                         // Clear up the fix if the paste wasn't succeeded.
 266                         setTimeout( function()
 267                         {
 268                                 // Element still online?
 269                                 if ( control.getParent() )
 270                                 {
 271                                         dummy.remove();
 272                                         sel.selectElement( control );
 273                                 }
 274                         }, 0 );
 275                 }
 276         }
 277
 278         var depressBeforeEvent;
 279         function stateFromNamedCommand( command, editor )
 280         {
 281                 // IE Bug: queryCommandEnabled('paste') fires also 'beforepaste(copy/cut)',
 282                 // guard to distinguish from the ordinary sources( either
 283                 // keyboard paste or execCommand ) (#4874).
 284                 CKEDITOR.env.ie && ( depressBeforeEvent = 1 );
 285
 286                 var retval = CKEDITOR.TRISTATE_OFF;
 287                 try { retval = editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED; }catch( er ){}
 288
 289                 depressBeforeEvent = 0;
 290                 return retval;
 291         }
 292
 293         var inReadOnly;
 294         function setToolbarStates()
 295         {
 296                 if ( this.mode != 'wysiwyg' )
 297                         return;
 298
 299                 this.getCommand( 'cut' ).setState( inReadOnly ? CKEDITOR.TRISTATE_DISABLED : stateFromNamedCommand( 'Cut', this ) );
 300                 this.getCommand( 'copy' ).setState( stateFromNamedCommand( 'Copy', this ) );
 301                 var pasteState = inReadOnly ? CKEDITOR.TRISTATE_DISABLED :
 302                                                 CKEDITOR.env.webkit ? CKEDITOR.TRISTATE_OFF : stateFromNamedCommand( 'Paste', this );
 303                 this.fire( 'pasteState', pasteState );
 304         }
 305
 306         // Register the plugin.
 307         CKEDITOR.plugins.add( 'clipboard',
 308                 {
 309                         requires : [ 'dialog', 'htmldataprocessor' ],
 310                         init : function( editor )
 311                         {
 312                                 // Inserts processed data into the editor at the end of the
 313                                 // events chain.
 314                                 editor.on( 'paste', function( evt )
 315                                         {
 316                                                 var data = evt.data;
 317                                                 if ( data[ 'html' ] )
 318                                                         editor.insertHtml( data[ 'html' ] );
 319                                                 else if ( data[ 'text' ] )
 320                                                         editor.insertText( data[ 'text' ] );
 321
 322                                                 setTimeout( function () { editor.fire( 'afterPaste' ); }, 0 );
 323
 324                                         }, null, null, 1000 );
 325
 326                                 editor.on( 'pasteDialog', function( evt )
 327                                         {
 328                                                 setTimeout( function()
 329                                                 {
 330                                                         // Open default paste dialog.
 331                                                         editor.openDialog( 'paste' );
 332                                                 }, 0 );
 333                                         });
 334
 335                                 editor.on( 'pasteState', function( evt )
 336                                         {
 337                                                 editor.getCommand( 'paste' ).setState( evt.data );
 338                                         });
 339
 340                                 function addButtonCommand( buttonName, commandName, command, ctxMenuOrder )
 341                                 {
 342                                         var lang = editor.lang[ commandName ];
 343
 344                                         editor.addCommand( commandName, command );
 345                                         editor.ui.addButton( buttonName,
 346                                                 {
 347                                                         label : lang,
 348                                                         command : commandName
 349                                                 });
 350
 351                                         // If the "menu" plugin is loaded, register the menu item.
 352                                         if ( editor.addMenuItems )
 353                                         {
 354                                                 editor.addMenuItem( commandName,
 355                                                         {
 356                                                                 label : lang,
 357                                                                 command : commandName,
 358                                                                 group : 'clipboard',
 359                                                                 order : ctxMenuOrder
 360                                                         });
 361                                         }
 362                                 }
 363
 364                                 addButtonCommand( 'Cut', 'cut', new cutCopyCmd( 'cut' ), 1 );
 365                                 addButtonCommand( 'Copy', 'copy', new cutCopyCmd( 'copy' ), 4 );
 366                                 addButtonCommand( 'Paste', 'paste', pasteCmd, 8 );
 367
 368                                 CKEDITOR.dialog.add( 'paste', CKEDITOR.getUrl( this.path + 'dialogs/paste.js' ) );
 369
 370                                 editor.on( 'key', onKey, editor );
 371
 372                                 // We'll be catching all pasted content in one line, regardless of whether the
 373                                 // it's introduced by a document command execution (e.g. toolbar buttons) or
 374                                 // user paste behaviors. (e.g. Ctrl-V)
 375                                 editor.on( 'contentDom', function()
 376                                 {
 377                                         var body = editor.document.getBody();
 378                                         body.on( CKEDITOR.env.webkit ? 'paste' : 'beforepaste', function( evt )
 379                                                 {
 380                                                         if ( depressBeforeEvent )
 381                                                                 return;
 382
 383                                                         // Fire 'beforePaste' event so clipboard flavor get customized
 384                                                         // by other plugins.
 385                                                         var eventData =  { mode : 'html' };
 386                                                         editor.fire( 'beforePaste', eventData );
 387
 388                                                         getClipboardData.call( editor, evt, eventData.mode, function ( data )
 389                                                         {
 390                                                                 // The very last guard to make sure the
 391                                                                 // paste has successfully happened.
 392                                                                 if ( !( data = CKEDITOR.tools.trim( data.replace( /<span[^>]+data-cke-bookmark[^<]*?<\/span>/ig,'' ) ) ) )
 393                                                                         return;
 394
 395                                                                 var dataTransfer = {};
 396                                                                 dataTransfer[ eventData.mode ] = data;
 397                                                                 editor.fire( 'paste', dataTransfer );
 398                                                         } );
 399                                                 });
 400
 401                                         // Dismiss the (wrong) 'beforepaste' event fired on context menu open. (#7953)
 402                                         body.on( 'contextmenu', function()
 403                                         {
 404                                                 depressBeforeEvent = 1;
 405                                                 setTimeout( function() { depressBeforeEvent = 0; }, 10 );
 406                                         });
 407
 408                                         body.on( 'beforecut', function() { !depressBeforeEvent && fixCut( editor ); } );
 409
 410                                         body.on( 'mouseup', function(){ setTimeout( function(){ setToolbarStates.call( editor ); }, 0 ); }, editor );
 411                                         body.on( 'keyup', setToolbarStates, editor );
 412                                 });
 413
 414                                 // For improved performance, we're checking the readOnly state on selectionChange instead of hooking a key event for that.
 415                                 editor.on( 'selectionChange', function( evt )
 416                                 {
 417                                         inReadOnly = evt.data.selection.getRanges()[ 0 ].checkReadOnly();
 418                                         setToolbarStates.call( editor );
 419                                 });
 420
 421                                 // If the "contextmenu" plugin is loaded, register the listeners.
 422                                 if ( editor.contextMenu )
 423                                 {
 424                                         editor.contextMenu.addListener( function( element, selection )
 425                                                 {
 426                                                         var readOnly = selection.getRanges()[ 0 ].checkReadOnly();
 427                                                         return {
 428                                                                 cut : !readOnly && stateFromNamedCommand( 'Cut', editor ),
 429                                                                 copy : stateFromNamedCommand( 'Copy', editor ),
 430                                                                 paste : !readOnly && ( CKEDITOR.env.webkit ? CKEDITOR.TRISTATE_OFF : stateFromNamedCommand( 'Paste', editor ) )
 431                                                         };
 432                                                 });
 433                                 }
 434                         }
 435                 });
 436 })();
 437
 438 /**
 439  * Fired when a clipboard operation is about to be taken into the editor.
 440  * Listeners can manipulate the data to be pasted before having it effectively
 441  * inserted into the document.
 442  * @name CKEDITOR.editor#paste
 443  * @since 3.1
 444  * @event
 445  * @param {String} [data.html] The HTML data to be pasted. If not available, e.data.text will be defined.
 446  * @param {String} [data.text] The plain text data to be pasted, available when plain text operations are to used. If not available, e.data.html will be defined.
 447  */
 448
 449 /**
 450  * Internal event to open the Paste dialog
 451  * @name CKEDITOR.editor#pasteDialog
 452  * @event
 453  */