source: trunk/src/gui/inputmethod/qinputcontextfactory.cpp

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

/****************************************************************************
**
** Implementation of QInputContextFactory class
**
** Copyright (C) 2003-2004 immodule for Qt Project.  All rights reserved.
**
** This file is written to contribute to Nokia Corporation and/or its subsidiary(-ies) under their own
** license. You may use this file under your Qt license. Following
** description is copied from their original file headers. Contact
** [email protected] if any conditions of this licensing are
** not clear to you.
**
****************************************************************************/

#include "qinputcontextfactory.h"

#ifndef QT_NO_IM

#include "qcoreapplication.h"
#include "qinputcontext.h"
#include "qinputcontextplugin.h"

#ifdef Q_WS_X11
#include "private/qt_x11_p.h"
#include "qximinputcontext_p.h"
#endif
#ifdef Q_WS_WIN
#include "qwininputcontext_p.h"
#endif
#ifdef Q_WS_MAC
#include "qmacinputcontext_p.h"
#endif
#ifdef Q_WS_S60
#include "qcoefepinputcontext_p.h"
#include "AknInputLanguageInfo.h"
#endif

#include "private/qfactoryloader_p.h"
#include "qmutex.h"

QT_BEGIN_NAMESPACE

#ifndef QT_NO_LIBRARY
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
    (QInputContextFactoryInterface_iid, QLatin1String("/inputmethods")))
#endif

/*!
    \class QInputContextFactory
    \brief The QInputContextFactory class creates QInputContext objects.


    The input context factory creates a QInputContext object for a
    given key with QInputContextFactory::create().

    The input contexts are either built-in or dynamically loaded from
    an input context plugin (see QInputContextPlugin).

    keys() returns a list of valid keys. The
    keys are the names used, for example, to identify and specify
    input methods for the input method switching mechanism. The names
    have to be consistent with QInputContext::identifierName(), and
    may only contain ASCII characters.

    A key can be used to retrieve the associated input context's
    supported languages using languages(). You
    can retrieve the input context's description using
    description() and finally you can get a user
    friendly internationalized name of the QInputContext object
    specified by the key using displayName().

    \legalese
    Copyright (C) 2003-2004 immodule for Qt Project.  All rights reserved.

    This file is written to contribute to Nokia Corporation and/or its subsidiary(-ies) under their own
    license. You may use this file under your Qt license. Following
    description is copied from their original file headers. Contact
    [email protected] if any conditions of this licensing are
    not clear to you.
    \endlegalese

    \sa QInputContext, QInputContextPlugin
*/

/*!
    Creates and returns a QInputContext object for the input context
    specified by \a key with the given \a parent. Keys are case
    sensitive.

    \sa keys()
*/
QInputContext *QInputContextFactory::create( const QString& key, QObject *parent )
{
    QInputContext *result = 0;
#if defined(Q_WS_X11) && !defined(QT_NO_XIM)
    if (key == QLatin1String("xim")) {
        result = new QXIMInputContext;
    }
#endif
#if defined(Q_WS_WIN)
    if (key == QLatin1String("win")) {
        result = new QWinInputContext;
    }
#endif
#if defined(Q_WS_MAC)
    if (key == QLatin1String("mac")) {
        result = new QMacInputContext;
    }
#endif
#if defined(Q_WS_S60)
    if (key == QLatin1String("coefep")) {
        result = new QCoeFepInputContext;
    }
#endif
#ifdef QT_NO_LIBRARY
    Q_UNUSED(key);
#else
    if (QInputContextFactoryInterface *factory =
        qobject_cast<QInputContextFactoryInterface*>(loader()->instance(key))) {
        result = factory->create(key);
    }
#endif
    if (result)
        result->setParent(parent);
    return result;
}


/*!
    Returns the list of keys this factory can create input contexts
    for.

    The keys are the names used, for example, to identify and specify
    input methods for the input method switching mechanism.  The names
    have to be consistent with QInputContext::identifierName(), and
    may only contain ASCII characters.

    \sa create(), displayName(), QInputContext::identifierName()
*/
QStringList QInputContextFactory::keys()
{
    QStringList result;
#if defined(Q_WS_X11) && !defined(QT_NO_XIM)
    result << QLatin1String("xim");
#endif
#if defined(Q_WS_WIN) && !defined(QT_NO_XIM)
    result << QLatin1String("win");
#endif
#if defined(Q_WS_MAC)
    result << QLatin1String("mac");
#endif
#if defined(Q_WS_S60)
    result << QLatin1String("coefep");
#endif
#ifndef QT_NO_LIBRARY
    result += loader()->keys();
#endif // QT_NO_LIBRARY
    return result;
}

#if defined(Q_WS_S60)
/*!
    \internal

    This function contains pure Symbian exception handling code for
    getting S60 language list.
    Returned object ownership is transferred to caller.
*/
static CAknInputLanguageList* s60LangListL()
{
    CAknInputLanguageInfo *langInfo = AknInputLanguageInfoFactory::CreateInputLanguageInfoL();
    CleanupStack::PushL(langInfo);
    // In rare phone there is more than 7 languages installed -> use 7 as an array granularity
    CAknInputLanguageList *langList = new (ELeave) CAknInputLanguageList(7);
    CleanupStack::PushL(langList);
    langInfo->AppendAvailableLanguagesL(langList);
    CleanupStack::Pop(langList);
    CleanupStack::PopAndDestroy(langInfo);
    return langList;
}

/*!
    \internal

    This function utility function return S60 language list.
    Returned object ownership is transferred to caller.
*/
static CAknInputLanguageList* s60LangList()
{
    CAknInputLanguageList *langList = NULL;
    TRAP_IGNORE(langList = s60LangListL());
    q_check_ptr(langList);
    return langList;
}
#endif

/*!
    Returns the languages supported by the QInputContext object
    specified by \a key.

    The languages are expressed as language code (e.g. "zh_CN",
    "zh_TW", "zh_HK", "ja", "ko", ...). An input context that supports
    multiple languages can return all supported languages as a
    QStringList. The name has to be consistent with
    QInputContext::language().

    This information may be used to optimize a user interface.

    \sa keys(), QInputContext::language(), QLocale
*/
QStringList QInputContextFactory::languages( const QString &key )
{
    QStringList result;
#if defined(Q_WS_X11) && !defined(QT_NO_XIM)
    if (key == QLatin1String("xim"))
        return QStringList(QString());
#endif
#if defined(Q_WS_WIN)
    if (key == QLatin1String("win"))
        return QStringList(QString());
#endif
#if defined(Q_WS_MAC)
    if (key == QLatin1String("mac"))
        return QStringList(QString());
#endif
#if defined(Q_WS_S60)
    if (key == QLatin1String("coefep"))
        {
        CAknInputLanguageList *langList = s60LangList();
        int count = langList->Count();
        for (int i = 0; i < count; ++i)
            {
            result.append(QString(qt_symbianLocaleName(langList->At(i)->LanguageCode())));
            }
        delete langList;
        }
#endif
#if defined(QT_NO_LIBRARY) || defined(QT_NO_SETTINGS)
    Q_UNUSED(key);
#else
    if (QInputContextFactoryInterface *factory =
        qobject_cast<QInputContextFactoryInterface*>(loader()->instance(key)))
        result = factory->languages(key);
#endif // QT_NO_LIBRARY
    return result;
}

/*!
    Returns a user friendly internationalized name of the
    QInputContext object specified by \a key. You can, for example,
    use this name in a menu.

    \sa keys(), QInputContext::identifierName()
*/
QString QInputContextFactory::displayName( const QString &key )
{
    QString result;
#if defined(Q_WS_X11) && !defined(QT_NO_XIM)
    if (key == QLatin1String("xim"))
        return QInputContext::tr( "XIM" );
#endif
#ifdef Q_WS_S60
    if (key == QLatin1String("coefep"))
        return QInputContext::tr( "FEP" );
#endif
#if defined(QT_NO_LIBRARY) || defined(QT_NO_SETTINGS)
    Q_UNUSED(key);
#else
    if (QInputContextFactoryInterface *factory =
        qobject_cast<QInputContextFactoryInterface*>(loader()->instance(key)))
        return factory->displayName(key);
#endif // QT_NO_LIBRARY
    return QString();
}

/*!
    Returns an internationalized brief description of the QInputContext
    object specified by \a key. You can, for example, use this
    description in a user interface.

    \sa keys(), displayName()
*/
QString QInputContextFactory::description( const QString &key )
{
#if defined(Q_WS_X11) && !defined(QT_NO_XIM)
    if (key == QLatin1String("xim"))
        return QInputContext::tr( "XIM input method" );
#endif
#if defined(Q_WS_WIN) && !defined(QT_NO_XIM)
    if (key == QLatin1String("win"))
        return QInputContext::tr( "Windows input method" );
#endif
#if defined(Q_WS_MAC)
    if (key == QLatin1String("mac"))
        return QInputContext::tr( "Mac OS X input method" );
#endif
#if defined(Q_WS_S60)
    if (key == QLatin1String("coefep"))
        return QInputContext::tr( "S60 FEP input method" );
#endif
#if defined(QT_NO_LIBRARY) || defined(QT_NO_SETTINGS)
    Q_UNUSED(key);
#else
    if (QInputContextFactoryInterface *factory =
        qobject_cast<QInputContextFactoryInterface*>(loader()->instance(key)))
        return factory->description(key);
#endif // QT_NO_LIBRARY
    return QString();
}

QT_END_NAMESPACE

#endif // QT_NO_IM