/****************************************************************************

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** this package.

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** ensure the GNU Lesser General Public License version 2.1 requirements

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****************************************************************************/

/****************************************************************************

**

** Implementation of QMultiInputContext class

**

** Copyright (C) 2004 immodule for Qt Project.  All rights reserved.

**

** This file is written to contribute to Nokia Corporation and/or its subsidiary(-ies) under their own

** licence. You may use this file under your Qt license. Following

** description is copied from their original file headers. Contact

** immodule-qt@freedesktop.org if any conditions of this licensing are

** not clear to you.

**

****************************************************************************/

#ifndef QT_NO_IM

#include "qmultiinputcontext.h"

#include <qinputcontextfactory.h>

#include <qstringlist.h>

#include <qaction.h>

#include <qsettings.h>

#include <qmenu.h>

#include <stdlib.h>

QT_BEGIN_NAMESPACE

QMultiInputContext::QMultiInputContext()

    : QInputContext(), current(-1)

{

    keys = QInputContextFactory::keys();

    for (int i = keys.size()-1; i >= 0; --i)

        if (keys.at(i).contains(QLatin1String("imsw")))

            keys.removeAt(i);

    QString def = QLatin1String(getenv("QT4_IM_MODULE"));

    if (def.isEmpty())

        def = QLatin1String(getenv("QT_IM_MODULE"));

    if (def.isEmpty()) {

        QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));

        settings.beginGroup(QLatin1String("Qt"));

        def = settings.value(QLatin1String("DefaultInputMethod"), QLatin1String("xim")).toString();

    }

    current = keys.indexOf(def);

    if (current < 0)

        current = 0;

    menu = new QMenu(tr("Select IM"));

    separator = new QAction(this);

    separator->setSeparator(true);

    QActionGroup *group = new QActionGroup(this);

    for (int i = 0; i < keys.size(); ++i) {

        slaves.append(0);

        const QString key = keys.at(i);

        QAction *a = menu->addAction(QInputContextFactory::displayName(key));

        a->setData(key);

        a->setCheckable(true);

        group->addAction(a);

        if (i == current) {

            slaves.replace(current, QInputContextFactory::create(key, this));

            a->setChecked(true);

        }

    }

    connect(group, SIGNAL(triggered(QAction*)), this, SLOT(changeSlave(QAction*)));

}

QMultiInputContext::~QMultiInputContext()

{

    delete menu;

}

QString QMultiInputContext::identifierName()

{

    return (slave()) ? slave()->identifierName() : QLatin1String("");

}

QString QMultiInputContext::language()

{

    return (slave()) ? slave()->language() : QLatin1String("");

}

#if defined(Q_WS_X11)

bool QMultiInputContext::x11FilterEvent(QWidget *keywidget, XEvent *event)

{

    return (slave()) ? slave()->x11FilterEvent(keywidget, event) : false;

}

#endif // Q_WS_X11

bool QMultiInputContext::filterEvent(const QEvent *event)

{

    return (slave()) ? slave()->filterEvent(event) : false;

}

void QMultiInputContext::reset()

{

    if (slave())

	slave()->reset();

}

void QMultiInputContext::update()

{

    if (slave())

	slave()->update();

}

void QMultiInputContext::mouseHandler(int x, QMouseEvent *event)

{

    if (slave())

	slave()->mouseHandler(x, event);

}

QFont QMultiInputContext::font() const

{

    return (slave()) ? slave()->font() : QInputContext::font();

}

void QMultiInputContext::setFocusWidget(QWidget *w)

{

    QInputContext::setFocusWidget(w);

    if (slave())

	slave()->setFocusWidget(w);

}

QWidget *QMultiInputContext::focusWidget() const

{

    return QInputContext::focusWidget();

}

void QMultiInputContext::widgetDestroyed(QWidget *w)

{

    if (slave())

	slave()->widgetDestroyed(w);

}

bool QMultiInputContext::isComposing() const

{

    return (slave()) ? slave()->isComposing() : false;

}

QList<QAction *> QMultiInputContext::actions()

{

    QList<QAction *> a = slave()->actions();

    a.append(separator);

    a.append(menu->menuAction());

    return a;

}

void QMultiInputContext::changeSlave(QAction *a)

{

    for (int i = 0; i < slaves.size(); ++i) {

        if (keys.at(i) == a->data().toString()) {

            if (slaves.at(i) == 0)

                slaves.replace(i, QInputContextFactory::create(keys.at(i), this));

            QInputContext *qic = slaves.at(current);

            QWidget *oldWidget = qic->focusWidget();

            qic->reset();

            qic->setFocusWidget(0);

            current = i;

            qic = slaves.at(current);

            qic->setFocusWidget(oldWidget);

            return;

        }

    }

}

QT_END_NAMESPACE

#endif // QT_NO_IM