/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2009 Martin Gräßlin <kde@martin-graesslin.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "configdialog.h"

#include <QDBusConnection>
#include <QDBusMessage>

#include <KLibLoader>
#include <KVBox>

namespace KWin
{

static const char* const border_names[ KDecorationDefines::BordersCount ] =
    {
    I18N_NOOP( "Tiny" ),
    I18N_NOOP( "Normal" ),
    I18N_NOOP( "Large" ),
    I18N_NOOP( "Very Large" ),
    I18N_NOOP( "Huge" ),
    I18N_NOOP( "Very Huge" ),
    I18N_NOOP( "Oversized" )
    };

KWinDecorationConfigForm::KWinDecorationConfigForm( QWidget* parent )
    : QWidget( parent )
    {
    setupUi( this );
    }

KWinDecorationConfigDialog::KWinDecorationConfigDialog( QString deco, const QList<QVariant>& borderSizes,
                                                        KDecorationDefines::BorderSize size,
                                                        QWidget* parent, Qt::WFlags flags )
    : KDialog( parent, flags )
    , m_borderSizes( borderSizes )
    , m_kwinConfig( KSharedConfig::openConfig( "kwinrc" ) )
    , m_pluginObject( 0 )
    , m_pluginConfigWidget( 0 )
    {
    m_ui = new KWinDecorationConfigForm( this );
    setWindowTitle( i18n("Decoration Options") );
    setButtons( KDialog::Ok | KDialog::Cancel | KDialog::Default | KDialog::Reset );
    enableButton( KDialog::Reset, false );
    QVBoxLayout* layout = new QVBoxLayout;
    layout->addWidget( m_ui );

    // Use klibloader for library manipulation
    KLibLoader* loader = KLibLoader::self();
    KLibrary* library = loader->library( styleToConfigLib( deco ) );
    if (library != NULL)
        {
        KLibrary::void_function_ptr alloc_ptr = library->resolveFunction("allocate_config");
        if (alloc_ptr != NULL)
            {
            allocatePlugin = (QObject* (*)(KConfigGroup& conf, QWidget* parent))alloc_ptr;
            KConfigGroup config( m_kwinConfig, "Style" );
            m_pluginConfigWidget = new KVBox( this );
            m_pluginObject = (QObject*)(allocatePlugin( config, m_pluginConfigWidget ));

            // connect required signals and slots together...
            connect( this, SIGNAL(accepted()), this, SLOT(slotAccepted()) );
            connect( m_pluginObject, SIGNAL(changed()), this, SLOT(slotSelectionChanged()) );
            connect( this, SIGNAL(pluginSave(KConfigGroup&)), m_pluginObject, SLOT(save(KConfigGroup &)) );
            connect( this, SIGNAL(defaultClicked()), m_pluginObject, SLOT(defaults()) );
            connect( this, SIGNAL(defaultClicked()), SLOT(slotDefault()) );
            }
        }

    if( m_pluginConfigWidget )
        {
        layout->addWidget( m_pluginConfigWidget );
        }

    if( borderSizes.count() >= 2 )
        {
        foreach( const QVariant& borderSize, borderSizes )
            {
            KDecorationDefines::BorderSize currentSize =
                static_cast<KDecorationDefines::BorderSize>( borderSize.toInt() );
            m_ui->bordersCombo->addItem(i18n(border_names[currentSize]), borderSizeToIndex(currentSize, borderSizes) );
            }
        m_ui->bordersCombo->setCurrentIndex( borderSizeToIndex( size, borderSizes ) );
        }
    else
        {
        m_ui->bordersCombo->hide();
        m_ui->borderLabel->hide();
        }

    QWidget* main = new QWidget( this );
    main->setLayout( layout );
    setMainWidget( main );
    }

KWinDecorationConfigDialog::~KWinDecorationConfigDialog()
    {
    delete m_pluginObject;
    }

KDecorationDefines::BorderSize KWinDecorationConfigDialog::borderSize() const
    {
    if( m_borderSizes.count() >= 2 )
        return (KDecorationDefines::BorderSize)m_borderSizes.at( m_ui->bordersCombo->currentIndex() ).toInt();
    return KDecorationDefines::BorderNormal;
    }

int KWinDecorationConfigDialog::borderSizeToIndex( KDecorationDefines::BorderSize size, const QList< QVariant >& sizes )
    {
    int pos = 0;
    for( QList< QVariant >::ConstIterator it = sizes.constBegin();
            it != sizes.constEnd();
            ++it, ++pos )
        if( size <= (*it).toInt() )
            break;
    return pos;
    }

void KWinDecorationConfigDialog::slotAccepted()
    {
    KConfigGroup config( m_kwinConfig, "Style" );
    emit pluginSave( config );
    config.sync();
    }

void KWinDecorationConfigDialog::slotSelectionChanged()
    {
    enableButton( KDialog::Reset, true );
    }

QString KWinDecorationConfigDialog::styleToConfigLib( const QString& styleLib ) const
    {
    if( styleLib.startsWith( "kwin3_" ))
        return "kwin_" + styleLib.mid( 6 ) + "_config";
    else
        return styleLib + "_config";
    }

void KWinDecorationConfigDialog::slotDefault()
    {
    if( m_borderSizes.count() >= 2 )
        m_ui->bordersCombo->setCurrentIndex( borderSizeToIndex( BorderNormal, m_borderSizes ) );
    }

} // namespace KWin

#include "configdialog.moc"