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/*
Copyright (c) 2003-2009, 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 );
doc.$.execCommand( command );
body.removeListener( command, onExec );
return enabled;
};
// Attempts to execute the Cut and Copy operations.
var tryToCutCopy =
CKEDITOR.env.ie ?
function( editor, type )
{
return execIECommand( editor, type );
}
: // !IE.
function( editor, type )
{
try
{
// Other browsers throw an error if the command is disabled.
return editor.document.$.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 =
CKEDITOR.env.ie ?
{
exec : function( editor, data )
{
// Prevent IE from pasting at the begining of the document.
editor.focus();
if ( !editor.fire( 'beforePaste' )
&& !execIECommand( editor, 'paste' ) )
{
editor.openDialog( 'paste' );
}
}
}
:
{
exec : function( editor )
{
try
{
if ( !editor.fire( 'beforePaste' )
&& !editor.document.$.execCommand( 'Paste', false, null ) )
{
throw 0;
}
}
catch ( e )
{
// Open the paste dialog.
editor.openDialog( 'paste' );
}
}
};
// Listens for some clipboard related keystrokes, so they get customized.
var onKey = function( event )
{
switch ( event.data.keyCode )
{
// Paste
case CKEDITOR.CTRL + 86 : // CTRL+V
case CKEDITOR.SHIFT + 45 : // SHIFT+INS
var editor = this;
editor.fire( 'saveSnapshot' ); // Save before paste
if ( editor.fire( 'beforePaste' ) )
event.cancel();
setTimeout( function()
{
editor.fire( 'saveSnapshot' ); // Save after paste
}, 0 );
return;
// Cut
case CKEDITOR.CTRL + 88 : // CTRL+X
case CKEDITOR.SHIFT + 46 : // SHIFT+DEL
// Save Undo snapshot.
editor = this;
editor.fire( 'saveSnapshot' ); // Save before paste
setTimeout( function()
{
editor.fire( 'saveSnapshot' ); // Save after paste
}, 0 );
}
};
// Register the plugin.
CKEDITOR.plugins.add( 'clipboard',
{
init : function( editor )
{
function addButtonCommand( buttonName, commandName, command, ctxMenuOrder )
{
var lang = editor.lang[ commandName ];
editor.addCommand( commandName, command );
editor.ui.addButton( buttonName,
{
label : lang,
command : commandName
});
// If the "menu" plugin is loaded, register the menu item.
if ( editor.addMenuItems )
{
editor.addMenuItem( commandName,
{
label : lang,
command : commandName,
group : 'clipboard',
order : ctxMenuOrder
});
}
}
addButtonCommand( 'Cut', 'cut', new cutCopyCmd( 'cut' ), 1 );
addButtonCommand( 'Copy', 'copy', new cutCopyCmd( 'copy' ), 4 );
addButtonCommand( 'Paste', 'paste', pasteCmd, 8 );
CKEDITOR.dialog.add( 'paste', CKEDITOR.getUrl( this.path + 'dialogs/paste.js' ) );
editor.on( 'key', onKey, editor );
// If the "contextmenu" plugin is loaded, register the listeners.
if ( editor.contextMenu )
{
function stateFromNamedCommand( command )
{
return editor.document.$.queryCommandEnabled( command ) ? CKEDITOR.TRISTATE_OFF : CKEDITOR.TRISTATE_DISABLED;
}
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' )
};
});
}
}
});
})();
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