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

**

** 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 HbUtils 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 "hbdocumentloader_p.h"

#include "hbdocumentloaderactions_p.h"

#include "hbdocumentloadersyntax_p.h"

#include "hbdocumentloader.h"

#include <hbxmlloaderbinaryactions_p.h>

#include <hbxmlloaderbinarysyntax_p.h>

#ifndef HB_BOOTSTRAPPED

#include <QGraphicsWidget>

#include <QCoreApplication>

#include <QDir>

#include <QPluginLoader>

#include "hbdocumentloaderplugin.h"

#include <hbmainwindow.h>

#include <hbinstance.h>

#include <QBuffer>

#endif // HB_BOOTSTRAPPED

/*

    \class HbDocumentLoaderPrivate

    \internal

    \proto

*/

//#define DEBUG_TIMES

#ifdef DEBUG_TIMES

#include <QTime>

#include <QDebug>

static QTime debugTime;

#ifdef Q_OS_SYMBIAN

#include <e32debug.h>

#endif

void doDebugPrintX(const char* text)

{

#ifdef Q_OS_SYMBIAN

    RDebug::Printf(text);

#else

    qDebug() << text;

#endif

}

// Takes standard c-format.

void debugPrintX(const char* cformat, ...)

{

    va_list ap;

    va_start(ap, cformat);

    QString str = QString().vsprintf(cformat, ap);

    va_end(ap);

    doDebugPrintX(str.toAscii().constData());

}

#endif // DEBUG_TIMES

HbDocumentLoaderPrivate::HbDocumentLoaderPrivate(const HbMainWindow *window)

: q_ptr(0)

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(window);

#else

    actions = new HbDocumentLoaderActions(this, window);

    binarysyntax = new HbXmlLoaderBinarySyntax(actions);

    pluginManager = new HbDocumentLoaderPluginManager;

#endif

    binaryactions = new HbXmlLoaderBinaryActions();

    syntax = new HbDocumentLoaderSyntax(binaryactions);

}

HbDocumentLoaderPrivate::~HbDocumentLoaderPrivate()

{

    delete binaryactions;

    delete syntax;

#ifndef HB_BOOTSTRAPPED

    delete pluginManager;

    delete actions;

    delete binarysyntax;

#endif

}

bool HbDocumentLoaderPrivate::createBinary( QIODevice *srcDevice, QIODevice *dstDevice )

{

    bool result = true;

    syntax->setActions( binaryactions );

#ifdef DEBUG_TIMES

    debugTime.restart();

    debugPrintX("MYTRACE: DocML create binary, start");

#endif

    binaryactions->setOutputDevice( dstDevice );

    // TODO: Has to process all sections!

    QList<QString> sectionsList;

    QHash< QString, qint64 > sectionsPositionList;

    qint64 startPos = srcDevice->pos();

    if( syntax->scanForSections( srcDevice, sectionsList ) ) {

        srcDevice->seek( startPos );

        result = syntax->load( srcDevice, "" );

        if( !sectionsList.isEmpty() ) {

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

                sectionsPositionList[ sectionsList.at( i ) ] = dstDevice->pos();

                srcDevice->seek( startPos );

                result &= syntax->load( srcDevice, sectionsList.at( i ) );

            }

        }

    } else {

        result = false;

    }

    qint64 sectionsMetaDataPos = dstDevice->pos();

    QDataStream stream( dstDevice );

    stream << sectionsPositionList;

    stream << sectionsMetaDataPos;

#ifdef DEBUG_TIMES

    debugPrintX("MYTRACE: DocML create binary, end: %d", debugTime.elapsed());

#endif

    return result;

}

bool HbDocumentLoaderPrivate::load( QIODevice *device, const QString &section )

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(device);

    Q_UNUSED(section);

    return false;

#else

    bool result(true);

    const bool originalTextMode = device->isTextModeEnabled();

    if (binarysyntax->isBinary(device)) {

        device->setTextModeEnabled( false );    

        binarysyntax->setActions(actions);

#ifdef DEBUG_TIMES

        debugTime.restart();

        debugPrintX("MYTRACE: DocML load binary, start");

#endif

        result = binarysyntax->load( device, section );

#ifdef DEBUG_TIMES

        debugPrintX("MYTRACE: DocML load binary, end: %d", debugTime.elapsed());

#endif

    } else {

        device->setTextModeEnabled( true );    

        syntax->setActions(actions);

#ifdef DEBUG_TIMES

        debugTime.restart();

        debugPrintX("MYTRACE: DocML load plain text, start");

#endif

        result = syntax->load( device, section );

#ifdef DEBUG_TIMES

        debugPrintX("MYTRACE: DocML load plain text, end: %d", debugTime.elapsed());

#endif

    }

    device->setTextModeEnabled( originalTextMode );    

    return result;

#endif

}

QList<QObject *> HbDocumentLoaderPrivate::takeAll()

{

#ifdef HB_BOOTSTRAPPED

    QList<QObject *> list;

    return list;

#else

    return actions->takeAll();

#endif

}

QGraphicsWidget* HbDocumentLoaderPrivate::findWidget(const QString &name) const

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(name);

    return 0;

#else

    return actions->findWidget( name );

#endif

}

QObject* HbDocumentLoaderPrivate::findObject(const QString &name) const

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(name);

    return 0;

#else

    return actions->findObject( name );

#endif

}

QObject *HbDocumentLoaderPrivate::lookUp(const QString& type, const QString &name, const QString &plugin)

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(type);

    Q_UNUSED(name);

    Q_UNUSED(plugin);

    return 0;

#else

    if ( plugin.isEmpty() ) {

        return q_ptr->createObject( type, name );

    } else {

        QObject *object = pluginManager->lookUp( type, name, plugin );

        if ( !object ) {

            // use factory loader for fallback

            object = q_ptr->createObject( type, name );

        }

        return object;

    }

#endif

}

void HbDocumentLoaderPrivate::reset()

{

#ifndef HB_BOOTSTRAPPED

    actions->reset();

#endif

}

bool HbDocumentLoaderPrivate::setObjectTree( QList<QObject *> roots )

{

#ifdef HB_BOOTSTRAPPED

    Q_UNUSED(roots);

    return false;

#else

    return actions->setObjectTree( roots );

#endif

}

QString HbDocumentLoaderPrivate::version()

{

#ifdef HB_BOOTSTRAPPED

    return QString();

#else

    return HbDocumentLoaderSyntax::version();

#endif

}

#ifndef HB_BOOTSTRAPPED

HbDocumentLoaderPluginManager::HbDocumentLoaderPluginManager()

{

}

HbDocumentLoaderPluginManager::~HbDocumentLoaderPluginManager()

{

    while ( mPlugins.count() ) {

        QPluginLoader *loader = mPlugins.at(0);

        mPlugins.removeAt( 0 );

        //loader->unload();

        delete loader;

    }

}

QStringList HbDocumentLoaderPluginManager::pluginPathList() const

{

    return hbInstance->libraryPaths();

}

QString HbDocumentLoaderPluginManager::pluginFileNameFilter() const

{

#if defined(Q_OS_MAC)

    return QString("*.dylib");

#elif defined(Q_OS_WIN32)

    return QString("*plugin.dll");

#elif defined(Q_OS_SYMBIAN)

    return QString("*.qtplugin");

#else

    return QString("*.so");

#endif

}

void HbDocumentLoaderPluginManager::scanPlugins()

{

    const QStringList pathList = pluginPathList();

    const QString fileNameFilter = pluginFileNameFilter();

    foreach (const QString &path, pathList) {

        QDir pluginDir(path, fileNameFilter, QDir::Unsorted, QDir::Files | QDir::Readable);

        foreach (const QString &fileName, pluginDir.entryList()) {

            QPluginLoader *loader = new QPluginLoader(pluginDir.absoluteFilePath(fileName));

            QObject *pluginInstance = loader->instance();

            if (pluginInstance) {

                    HbDocumentLoaderPlugin *plugin =

                        qobject_cast<HbDocumentLoaderPlugin*>(pluginInstance);

                // plugin found. Call function handle it.

                if (plugin) {

                    mPlugins.append( loader );

                    continue;

                }

                loader->unload();

            }

            delete loader;

        }

    }

}

QObject *HbDocumentLoaderPluginManager::lookUp(const QString& type, const QString &name, const QString &plugin)

{

    QObject *result = 0;

    QPluginLoader *loader = lookUpPlugin( plugin );

    if ( loader ) {

        result = qobject_cast<HbDocumentLoaderPlugin*>(loader->instance())->createObject( type, name );

    } else {

        HB_DOCUMENTLOADER_PRINT( QString( "Cannot find plug-in: " ) + plugin );

    }

    return result;

}

QPluginLoader *HbDocumentLoaderPluginManager::lookUpPlugin( const QString &plugin )

{

    // check the exising plug-ins

    foreach( QPluginLoader *loader, mPlugins ) {

        const QFileInfo fileInfo( loader->fileName() );

        QString compareName;

#if defined(Q_OS_UNIX) && !defined(Q_OS_SYMBIAN)

        compareName.append( "lib" );

#endif

        compareName.append( plugin );

        if ( fileInfo.baseName() == compareName ) {

            return loader;

        }

    }

    // not found -> try to find it.

    const QStringList pathList = pluginPathList();

    QString fileNameFilter;

#if defined(Q_OS_UNIX) && !defined(Q_OS_SYMBIAN)

    fileNameFilter.append( "lib" );

#endif

    fileNameFilter.append( plugin );

    fileNameFilter.append( "*" );

    foreach (const QString &path, pathList) {

        QDir pluginDir(path, fileNameFilter, QDir::Unsorted, QDir::Files | QDir::Readable);

        foreach (const QString &fileName, pluginDir.entryList()) {

            QPluginLoader *loader = new QPluginLoader(pluginDir.absoluteFilePath(fileName));

            QObject *pluginInstance = loader->instance();

            if (pluginInstance) {

                HbDocumentLoaderPlugin *plugin =

                    qobject_cast<HbDocumentLoaderPlugin*>(pluginInstance);

                if (plugin) {

                    mPlugins.append( loader );

                    return loader;

                } else {

                    loader->unload();

                }

            }

        }

    }

    return 0;

}

#endif // HB_BOOTSTRAPPED

// end of file