/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/
/**
* @file Clipboard support
*/
(function()
{
// Tries to execute any of the paste, cut or copy commands in IE. Returns a
// boolean indicating that the operation succeeded.
var execIECommand = function( editor, command )
{
var doc = editor.document,
body = doc.getBody();
var enabled = false;
var onExec = function()
{
enabled = true;
};
// The following seems to be the only reliable way to detect that
// clipboard commands are enabled in IE. It will fire the
// onpaste/oncut/oncopy events only if the security settings allowed
// the command to execute.
body.on( command, onExec );
// IE6/7: document.execCommand has problem to paste into positioned element.
( CKEDITOR.env.version > 7 ? doc.$ : doc.$.selection.createRange() ) [ 'execCommand' ]( command );
body.removeListener( command, onExec );
return enabled;
};
// Attempts to execute the Cut and Copy operations.
var tryToCutCopy =
CKEDITOR.env.ie ?
function( editor, type )
{
return execIECommand( editor, type );
}
: // !IE.
function( editor, type )
{
try
{
// Other browsers throw an error if the command is disabled.
return editor.document.$.execCommand( type );
}
catch( e )
{
return false;
}
};
// A class that represents one of the cut or copy commands.
var cutCopyCmd = function( type )
{
this.type = type;
this.canUndo = ( this.type == 'cut' ); // We can't undo copy to clipboard.
};
cutCopyCmd.prototype =
{
exec : function( editor, data )
{
var success = tryToCutCopy( editor, this.type );
if ( !success )
alert( editor.lang.clipboard[ this.type + 'Error' ] ); // Show cutError or copyError.
return success;
}
};
// Paste command.
var pasteCmd =
{
canUndo : false,
exec :
CKEDITOR.env.ie ?
function( editor )
{
// Prevent IE from pasting at the begining of the document.
editor.focus();
if ( !editor.document.getBody().fire( 'beforepaste' )
&& !execIECommand( editor, 'paste' ) )
{
editor.fire( 'pasteDialog' );
return false;
}
}
:
function( editor )
{
try
{
if ( !editor.document.getBody().fire( 'beforepaste' )
&& !editor.document.$.execCommand( 'Paste', false, null ) )
{
throw 0;
}
}
catch ( e )
{
setTimeout( function()
{
editor.fire( 'pasteDialog' );
}, 0 );
return false;
}
}
};
// Listens for some clipboard related keystrokes, so they get customized.
var onKey = function( event )
{
if ( this.mode != 'wysiwyg' )
return;
switch ( event.data.keyCode )
{
// Paste
case CKEDITOR.CTRL + 86 : // CTRL+V
case CKEDITOR.SHIFT + 45 : // SHIFT+INS
var body = this.document.getBody();
// Simulate 'beforepaste' event for all none-IEs.
if ( !CKEDITOR.env.ie && body.fire( 'beforepaste' ) )
event.cancel();
// Simulate 'paste' event for Opera/Firefox2.
else if ( CKEDITOR.env.opera
|| CKEDITOR.env.gecko && CKEDITOR.env.version < 10900 )
body.fire( 'paste' );
return;
// Cut
case CKEDITOR.CTRL + 88 : // CTRL+X
case CKEDITOR.SHIFT + 46 : // SHIFT+DEL
// Save Undo snapshot.
var editor = this;
this.fire( 'saveSnapshot' ); // Save before paste
setTimeout( function()
{
editor.fire( 'saveSnapshot' ); // Save after paste
}, 0 );
}
};
// Allow to peek clipboard content by redirecting the
// pasting content into a temporary bin and grab the content of it.
function getClipboardData( evt, mode, callback )
{
var doc = this.document;
// Avoid recursions on 'paste' event for IE.
if ( CKEDITOR.env.ie && doc.getById( 'cke_pastebin' ) )
return;
// If the browser supports it, get the data directly
if (mode == 'text' && evt.data && evt.data.$.clipboardData)
{
// evt.data.$.clipboardData.types contains all the flavours in Mac's Safari, but not on windows.
var plain = evt.data.$.clipboardData.getData( 'text/plain' );
if (plain)
{
evt.data.preventDefault();
callback( plain );
return;
}
}
var sel = this.getSelection(),
range = new CKEDITOR.dom.range( doc );
// Create container to paste into
var pastebin = new CKEDITOR.dom.element( mode == 'text' ? 'textarea' : 'div', doc );
pastebin.setAttribute( 'id', 'cke_pastebin' );
// Safari requires a filler node inside the div to have the content pasted into it. (#4882)
CKEDITOR.env.webkit && pastebin.append( doc.createText( '\xa0' ) );
doc.getBody().append( pastebin );
// It's definitely a better user experience if we make the paste-bin pretty unnoticed
// by pulling it off the screen.
pastebin.setStyles(
{
position : 'absolute',
left : '-1000px',
// Position the bin exactly at the position of the selected element
// to avoid any subsequent document scroll.
top : sel.getStartElement().getDocumentPosition().y + 'px',
width : '1px',
height : '1px',
overflow : 'hidden'
});
var bms = sel.createBookmarks();
// Turn off design mode temporarily before give focus to the paste bin.
if ( mode == 'text' )
{
if ( CKEDITOR.env.ie )
{
var ieRange = doc.getBody().$.createTextRange();
ieRange.moveToElementText( pastebin.$ );
ieRange.execCommand( 'Paste' );
evt.data.preventDefault();
}
else
{
doc.$.designMode = 'off';
pastebin.$.focus();
}
}
else
{
range.setStartAt( pastebin, CKEDITOR.POSITION_AFTER_START );
range.setEndAt( pastebin, CKEDITOR.POSITION_BEFORE_END );
range.select( true );
}
// Wait a while and grab the pasted contents
window.setTimeout( function()
{
mode == 'text' && !CKEDITOR.env.ie && ( doc.$.designMode = 'on' );
pastebin.remove();
// Grab the HTML contents.
// We need to look for a apple style wrapper on webkit it also adds
// a div wrapper if you copy/paste the body of the editor.
// Remove hidden div and restore selection.
var bogusSpan;
pastebin = ( CKEDITOR.env.webkit
&& ( bogusSpan = pastebin.getFirst() )
&& ( bogusSpan.is && bogusSpan.hasClass( 'Apple-style-span' ) ) ?
bogusSpan : pastebin );
sel.selectBookmarks( bms );
callback( pastebin[ 'get' + ( mode == 'text' ? 'Value' : 'Html' ) ]() );
}, 0 );
}
// Register the plugin.
CKEDITOR.plugins.add( 'clipboard',
{
requires : [ 'dialog', 'htmldataprocessor' ],
init : function( editor )
{
// Inserts processed data into the editor at the end of the
// events chain.
editor.on( 'paste', function( evt )
{
var data = evt.data;
if ( data[ 'html' ] )
editor.insertHtml( data[ 'html' ] );
else if ( data[ 'text' ] )
editor.insertText( data[ 'text' ] );
}, null, null, 1000 );
editor.on( 'pasteDialog', function( evt )
{
setTimeout( function()
{
// Open default paste dialog.
editor.openDialog( 'paste' );
}, 0 );
});
function addButtonCommand( buttonName, commandName, command, ctxMenuOrder )
{
var lang = editor.lang[ commandName ];
editor.addCommand( commandName, command );
editor.ui.addButton( buttonName,
{
label : lang,
command : commandName
});
// If the "menu" plugin is loaded, register the menu item.
if ( editor.addMenuItems )
{
editor.addMenuItem( commandName,
{
label : lang,
command : commandName,
group : 'clipboard',
order : ctxMenuOrder
});
}
}
addButtonCommand( 'Cut', 'cut', new cutCopyCmd( 'cut' ), 1 );
addButtonCommand( 'Copy', 'copy', new cutCopyCmd( 'copy' ), 4 );
addButtonCommand( 'Paste', 'paste', pasteCmd, 8 );
CKEDITOR.dialog.add( 'paste', CKEDITOR.getUrl( this.path + 'dialogs/paste.js' ) );
editor.on( 'key', onKey, editor );
var mode = editor.config.forcePasteAsPlainText ? 'text' : 'html';
// We'll be catching all pasted content in one line, regardless of whether the
// it's introduced by a document command execution (e.g. toolbar buttons) or
// user paste behaviors. (e.g. Ctrl-V)
editor.on( 'contentDom', function()
{
var body = editor.document.getBody();
body.on( ( (mode == 'text' && CKEDITOR.env.ie) || CKEDITOR.env.webkit ) ? 'paste' : 'beforepaste',
function( evt )
{
if ( depressBeforePasteEvent )
return;
getClipboardData.call( editor, evt, mode, function ( data )
{
// The very last guard to make sure the
// paste has successfully happened.
if ( !data )
return;
var dataTransfer = {};
dataTransfer[ mode ] = data;
editor.fire( 'paste', dataTransfer );
} );
});
});
// If the "contextmenu" plugin is loaded, register the listeners.
if ( editor.contextMenu )
{
var depressBeforePasteEvent;
function stateFromNamedCommand( command )
{
// IE Bug: queryCommandEnabled('paste') fires also 'beforepaste',
// guard to distinguish from the ordinary sources( either
// keyboard paste or execCommand ) (#4874).
CKEDITOR.env.ie && command == 'Paste'&& ( depressBeforePasteEvent = 1 );
var retval = editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
depressBeforePasteEvent = 0;
return retval;
}
editor.contextMenu.addListener( function()
{
return {
cut : stateFromNamedCommand( 'Cut' ),
// Browser bug: 'Cut' has the correct states for both Copy and Cut.
copy : stateFromNamedCommand( 'Cut' ),
paste : CKEDITOR.env.webkit ? CKEDITOR.TRISTATE_OFF : stateFromNamedCommand( 'Paste' )
};
});
}
}
});
})();
/**
* Fired when a clipboard operation is about to be taken into the editor.
* Listeners can manipulate the data to be pasted before having it effectively
* inserted into the document.
* @name CKEDITOR.editor#paste
* @since 3.1
* @event
* @param {String} [data.html] The HTML data to be pasted. If not available, e.data.text will be defined.
* @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.
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