/* This file is part of the KDE project
   Copyright (C) 2001, 2002, 2003 The Karbon Developers

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/

#include "karbon_drag.h"

#include <tqcstring.h>
#include <tqdom.h>
#include <tqtextstream.h>

#include "vdocument.h"

TQCString KarbonDrag::m_encodeFormats[NumEncodeFmts];
TQCString KarbonDrag::m_decodeFormats[NumDecodeFmts];

KarbonDrag::KarbonDrag( TQWidget *dragSource, const char *name )
 : TQDragObject( dragSource, name )
{
	m_encodeFormats[0] = "application/vnd.kde.karbon";
	m_decodeFormats[0] = "application/vnd.kde.karbon";
}

const char *
KarbonDrag::format( int i ) const
{
	if( i < NumEncodeFmts ) {
		return m_encodeFormats[i];
	}

	return 0L;
}

TQByteArray
KarbonDrag::encodedData( const char* mimetype ) const
{
	TQCString result;

	if( m_encodeFormats[0] == mimetype )
	{
		VObjectListIterator itr( m_objects );
		// build a xml fragment containing the selection as karbon xml
		TQDomDocument doc( "clip" );
		TQDomElement elem = doc.createElement( "clip" );
		TQTextStream ts( result, IO_WriteOnly );

		for( ; itr.current() ; ++itr )
			itr.current()->save( elem );

		ts << elem;
	}

	return result;
}

bool
KarbonDrag::canDecode( TQMimeSource* e)
{
	for( int i = 0; i < NumDecodeFmts; i++ )
	{
		if( e->provides( m_decodeFormats[i] ) )
			return true;
	}

	return false;
}

bool
KarbonDrag::decode( TQMimeSource* e, VObjectList& sl, VDocument& vdoc )
{
	if( e->provides( m_decodeFormats[0] ) )
	{
		TQDomDocument doc( "clip" );
		TQByteArray data = e->encodedData( m_decodeFormats[0] );
		doc.setContent( TQCString( data, data.size()+1 ) );
		TQDomElement clip = doc.documentElement();
		// Try to parse the clipboard data
		if( clip.tagName() == "clip" )
		{
			VGroup grp( &vdoc );
			grp.load( clip );
			VObjectListIterator itr( grp.objects() );
			for( ; itr.current() ; ++itr )
			{
				VObject *obj = itr.current()->clone();
				obj->setParent( 0L );
				sl.append( obj );
			}

			return true;
		}
	}

	return false;
}

void
KarbonDrag::setObjectList( VObjectList l )
{
	VObjectListIterator itr( l );
	m_objects.clear();

	for( ; itr.current() ; ++itr )
		m_objects.append( itr.current()->clone() );
}

#include "karbon_drag.moc"