/* This file is part of the KDE project
   Copyright (C) 2005 Jaroslaw Staniek <js@iidea.pl>

   This program 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 program 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 program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "kexicharencodingcombobox.h"

#include <qtextcodec.h>

#include <kdebug.h>
#include <klocale.h>
#include <kglobal.h>
#include <kcharsets.h>

KexiCharacterEncodingComboBox::KexiCharacterEncodingComboBox( 
	QWidget* parent, const QString& selectedEncoding )
 : KComboBox( parent, "KexiCharacterEncodingComboBox" )
 , m_defaultEncodingAdded(false)
{
	QString defaultEncoding(QString::fromLatin1(KGlobal::locale()->encoding()));
	QString defaultEncodingDescriptiveName;

	QString _selectedEncoding = selectedEncoding;
	if (_selectedEncoding.isEmpty())
		_selectedEncoding = QString::fromLatin1(KGlobal::locale()->encoding());

	QStringList descEncodings(KGlobal::charsets()->descriptiveEncodingNames());
	QStringList::ConstIterator it = descEncodings.constBegin();

	for (uint id = 0; it!=descEncodings.constEnd(); ++it)
	{
		bool found = false;
		QString name( KGlobal::charsets()->encodingForName( *it ) );
		QTextCodec *codecForEnc = KGlobal::charsets()->codecForName(name, found);
		if (found) {
			insertItem(*it);
			if (codecForEnc->name() == defaultEncoding || name == defaultEncoding) {
				defaultEncodingDescriptiveName = *it;
				//remember, do not add, will be prepended later
			}
			else {
				m_encodingDescriptionForName.insert(name, *it);
			}
			if (codecForEnc->name() == _selectedEncoding || name == _selectedEncoding) {
				setCurrentItem(id);
			}
			id++;
		}
	}

	//prepend default encoding, if present
	if (!defaultEncodingDescriptiveName.isEmpty()) {
		m_defaultEncodingAdded = true;
		QString desc = i18n("Text encoding: Default", "Default: %1")
			.arg(defaultEncodingDescriptiveName);
		insertItem( desc, 0 );
		if (_selectedEncoding==defaultEncoding) {
			setCurrentItem(0);
		}
		else
			setCurrentItem(currentItem()+1);
		m_encodingDescriptionForName.insert(defaultEncoding, desc);
	}
}

KexiCharacterEncodingComboBox::~KexiCharacterEncodingComboBox()
{
}

QString KexiCharacterEncodingComboBox::selectedEncoding() const
{
	if (defaultEncodingSelected()) {
		return QString::fromLatin1(KGlobal::locale()->encoding());
	}
	else {
		return KGlobal::charsets()->encodingForName( currentText() );
	}
}

void KexiCharacterEncodingComboBox::setSelectedEncoding(const QString& encodingName)
{
	QString desc = m_encodingDescriptionForName[encodingName];
	if (desc.isEmpty()) {
		kdWarning() << "KexiCharacterEncodingComboBox::setSelectedEncoding(): "
			"no such encoding \"" << encodingName << "\"" << endl;
		return;
	}
	setCurrentText(desc);
}

bool KexiCharacterEncodingComboBox::defaultEncodingSelected() const
{
	return m_defaultEncodingAdded && 0==currentItem();
}

void KexiCharacterEncodingComboBox::selectDefaultEncoding()
{
	if (m_defaultEncodingAdded)
		setCurrentItem(0);
}