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

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

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

#include "hbinpututils.h"

#include <QObject>

#include <QLocale>

#include <QDir>

#include <QPluginLoader>

#include <QInputContextPlugin>

#include <QGraphicsScene>

#include <QWidget>

#include <QGraphicsWidget>

#include <QGraphicsView>

#include <QGridLayout>

#include <QGraphicsProxyWidget>

#include "hbinputkeymap.h"

#include "hbinputkeymapfactory.h"

#include "hbinputsettingproxy.h"

#include "hbinputlanguagedatabase.h"

#include "hbinputmodecache_p.h"

#include "hbinputlanguage.h"

#define HB_DIGIT_ARABIC_INDIC_START_VALUE   0x0660

#define HB_DIGIT_EASTERN_ARABIC_START_VALUE 0x06F0

/*!

\class HbInputUtils

\sa HbInputMethod

\sa QInputContextPlugin

*/

/*!

*/

QChar HbInputUtils::findFirstNumberCharacterBoundToKey(const HbMappedKey *key,

        const HbInputLanguage language,

        const HbInputDigitType digitType)

{

    Q_UNUSED(language);

    if (key) {

        QString chars = key->characters(HbModifierNone);

        if (digitType == HbDigitTypeLatin) {

            for (int i = 0; i < chars.length(); i++) {

                if (chars.at(i) >= '0' && chars.at(i) <= '9') {

                    return chars.at(i);

                }

            }

        } else if (digitType == HbDigitTypeDevanagari) {

            for (int i = 0; i < chars.length(); i++) {

                if (chars.at(i) >= 0x0966 && chars.at(i) <= 0x096F) {

                    return chars.at(i);

                }

            }

        } else if (digitType == HbDigitTypeArabicIndic) {

            for (int i = 0; i < chars.length(); i++) {

                if (chars.at(i) >= '0' && chars.at(i) <= '9') {

                    return HB_DIGIT_ARABIC_INDIC_START_VALUE +

                           (chars.at(i).unicode() - '0');

                }

            }

        } else if (digitType == HbDigitTypeEasternArabic) {

            for (int i = 0; i < chars.length(); i++) {

                if (chars.at(i) >= '0' && chars.at(i) <= '9') {

                    return HB_DIGIT_EASTERN_ARABIC_START_VALUE +

                           (chars.at(i).unicode() - '0');

                }

            }

        }

    }

    return 0;

}

/*!

For example Chinese and Japanese modes do not have text case.

*/

bool HbInputUtils::isCaseSensitiveMode(HbInputModeType inputMode)

{

    if (isChineseInputMode(inputMode)) {

        return false;

    }

    return true;

}

/*!

files that are not language database plugins. languageDatabasePluginInstance()

checks the validity of plugin files provided by this function.

\sa languageDatabasePluginInstance

*/

void HbInputUtils::listAvailableLanguageDatabasePlugins(QStringList &result, const QString &subfolder)

{

    QString path(HbInputSettingProxy::languageDatabasePath());

    path += QDir::separator();

    path += subfolder;

    QDir dir(path);

    for (unsigned int i = 0; i < dir.count(); i++) {

        if (QLibrary::isLibrary(dir[i])) {

            result.append(dir[i]);

        }

    }

}

/*!

*/

HbLanguageDatabaseInterface *HbInputUtils::languageDatabasePluginInstance(const QString &pluginFileName, const QString &subfolder)

{

    if (!QLibrary::isLibrary(pluginFileName)) {

        qDebug("HbInputUtils::languageDatabasePluginInstance: Not a library!");

        return NULL;

    }

    HbLanguageDatabaseInterface *res = NULL;

    QString fullName(HbInputSettingProxy::languageDatabasePath());

    fullName += QDir::separator();

    if (subfolder.length() > 0) {

        fullName += subfolder;

        fullName += QDir::separator();

    }

    fullName += pluginFileName;

    QPluginLoader loader(fullName);

    QObject *plugin = loader.instance();

    if (plugin) {

        res = qobject_cast<HbLanguageDatabaseInterface *>(plugin);

    } else {

        qDebug("HbInputUtils::languageDatabasePluginInstance: Unable to instantiate plugin");

    }

    return res;

}

/*!

*/

void HbInputUtils::listSupportedInputLanguages(QList<HbInputLanguage>& results)

{

    results = HbInputModeCache::instance()->listInputLanguages();

}

/*!

*/

QWidget *HbInputUtils::createWrapperWidget(QGraphicsWidget *graphicsWidget)

{

    QWidget *ret = 0;

    if (graphicsWidget) {

        ret = new QWidget;

        ret->setContentsMargins(0, 0, 0, 0);

        QGraphicsScene *scene = new QGraphicsScene(ret);

        scene->addItem(graphicsWidget);

        QGraphicsView *view = new QGraphicsView(scene);

        view->setContentsMargins(0, 0, 0, 0);

        QGridLayout *layout = new QGridLayout;

        layout->setMargin(0);

        layout->setContentsMargins(0, 0, 0, 0);

        layout->addWidget(view);

        ret->setLayout(layout);

    }

    return ret;

}

/*!

*/

QGraphicsWidget *HbInputUtils::createGraphicsProxyWidget(QWidget *widget)

{

    QGraphicsProxyWidget *proxy = 0;

    if (widget) {

        proxy = new QGraphicsProxyWidget;

        proxy->setWidget(widget);

    }

    return proxy;

}

/*!

*/

HbInputDigitType HbInputUtils::inputDigitType(HbInputLanguage language)

{

    HbInputDigitType digitType = HbDigitTypeNone;

    switch (language.language()) {

    case QLocale::Arabic:

        digitType = HbDigitTypeArabicIndic;

        break;

    case QLocale::Persian:

    case QLocale::Urdu:

        digitType = HbDigitTypeEasternArabic;

        break;

    case QLocale::Hindi:

        digitType = HbDigitTypeDevanagari;

        break;

    default:

        digitType = HbDigitTypeLatin;

        break;

    }

    return digitType;

}

/*!

*/

QGraphicsProxyWidget *HbInputUtils::graphicsProxyWidget(const QWidget *w)

{

    QGraphicsProxyWidget *pw = w ? w->graphicsProxyWidget() : 0;

    if (w && !pw) {

        pw = w->window() ? w->window()->graphicsProxyWidget() : w->graphicsProxyWidget();

    }

    return pw;

}

// End of file