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

**

** 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 HbApps 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 <QSettings>

#include <QStringList>

#include <QDir>

#include <QTimer>

#include <hbinstance.h>

#include <hbmenu.h>

#include <hbaction.h>

#include <hbicon.h>

#include <hblistwidgetitem.h>

#include <QDebug>

#include <QTime>

#include <QThread>

#include "themeselectionlist.h"

#include "themechangerdefs.h"

/**

 * Constructor

 */

ThemeSelectionList::ThemeSelectionList(

#ifdef Q_OS_SYMBIAN

    ThemeClientSymbian* client

#else

    ThemeClientQt* client

#endif

                        ): 

                        oldItemIndex(-1),

                        themelist(new HbListWidget(this)),

                        rightMark(new HbIcon(QString("qtg_small_tick"))),

                        noMark(new HbIcon(QString(""))),

                        client(client)

{

    connect(themelist, SIGNAL(activated(HbListWidgetItem *)),this, SLOT(setChosen(HbListWidgetItem *)));

    setWidget(themelist);

    // Automatic updation of the themelist when some theme is installed or uninstalled

    // when the hbthemechanger app is open

    watcher=new QFileSystemWatcher();

    foreach(const QString &KThemeRootPath, rootPaths()) {

        if(!KThemeRootPath.contains("/romthemes")){

        watcher->addPath(KThemeRootPath+"/themes/icons/");

        }

    }

    connect(watcher,SIGNAL(directoryChanged(const QString &)),this,SLOT(updateThemeList(const QString &)));

    QObject::connect(this,SIGNAL(newThemeSelected(QString)),this,SLOT(sendThemeName(QString)));    

#ifdef THEME_CHANGER_TIMER_LOG

    idleTimer = new QTimer(this);

    connect(idleTimer, SIGNAL(timeout()), this, SLOT(processWhenIdle()));

    connect(hbInstance->theme(),SIGNAL(changeFinished()), this, SLOT(themeChanged()));

    idleTimer->start(0); // to make a connection to server

#endif

}

/**

 * Destructor

 */

ThemeSelectionList::~ThemeSelectionList()

{

    // Set the theme to the applied theme before exiting.

    setChosen(themelist->item(oldItemIndex));

    delete noMark;

    noMark=NULL;

    delete rightMark;

    rightMark=NULL;

    // Reset the item view

    themelist->reset();

    delete themelist;

    themelist=NULL;

}

/**

 * displayThemes

 */

void ThemeSelectionList::displayThemes()

{

    bool entryAdded = false;

    bool themePresent = false;

    foreach(const QString &KThemeRootPath, rootPaths()){

        dir.setPath(KThemeRootPath) ;

        QStringList list = dir.entryList(QDir::AllDirs|QDir::NoDotAndDotDot,QDir::Name);

        if(list.contains("themes",Qt::CaseInsensitive )) {

            themePresent = true;

            QDir root = KThemeRootPath;

            dir.setPath(root.path()+"/themes/icons/") ;

            QStringList iconthemeslist=dir.entryList(QDir::AllDirs|QDir::NoDotAndDotDot,QDir::Name);

            foreach(QString themefolder, iconthemeslist) {

                QDir iconThemePath(root.path()+"/themes/icons/"+themefolder);

                if(iconThemePath.exists("index.theme")) {

                    QSettings iniSetting(iconThemePath.path()+"/index.theme",QSettings::IniFormat);

                    iniSetting.beginGroup("Icon Theme");

                    QString hidden = iniSetting.value("Hidden").toString();

                    QString name = iniSetting.value("Name").toString();

                    iniSetting.endGroup();

                    if((hidden == "true") ||( hidden == "")||(name!=themefolder) ) {

                        iconthemeslist.removeOne(themefolder);

                    }

                }

                else {

                     iconthemeslist.removeOne(themefolder);

                }

            }

            if(!entryAdded){

                iconthemeslist.insert(0,"hbdefault"); //adding one default entry

                entryAdded = true;

            }

            list=iconthemeslist;

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

                // populate theme list with existing themes

                if((HbInstance::instance()->theme()->name())==(list.at(i))) { 

                    themelist->addItem(*rightMark,list.at(i));

                    oldItemIndex=themelist->count()-1;

                    themelist->setCurrentRow(oldItemIndex);

                }

                else {

                    themelist->addItem(*noMark,list.at(i));

                }

            }

        }

    }

    //    else{//add a case for no theme ,make hbdefault entry

    if(!themePresent) {

            QStringList defaultList;

            defaultList.insert(0,"hbdefault"); //adding one default entry

            themelist->addItem(*rightMark,defaultList.at(0));

            QString themeName=HbInstance::instance()->theme()->name();

            if (themeName != "hbdefault")

            {

                if (!client->isConnected()) {

                    bool success = client->connectToServer();

                    if (success) {

                        emit newThemeSelected("hbdefault");

                    }

                }

                else {

                    emit newThemeSelected("hbdefault");

                }

            }

        }

}

/**

 * setChosen

 */

void ThemeSelectionList::setChosen(HbListWidgetItem *item)

{

    QString str=item->text();

#ifdef THEME_CHANGER_TRACES

    qDebug() << "ThemeSelectionList::Setchosen with ThemeName: "<<str;

#endif

    if(iCurrentTheme != str ) {

#ifdef THEME_CHANGER_TIMER_LOG

        timer.start();

        qDebug() << "Selected theme: " << str;

#endif

        iCurrentTheme = str;

        if (!client->isConnected()) {

            bool success = client->connectToServer();

            if (success) {

                QThread::currentThread()->setPriority(QThread::HighPriority);

                emit newThemeSelected(str);

            }

        }

        else {

            QThread::currentThread()->setPriority(QThread::HighPriority);

            emit newThemeSelected(str); 

        }

    }

    else

    {

        applySelection(); //double tap //put a tick

    }

}

/**

 * applySelection

 */

void ThemeSelectionList::applySelection()

{

    if(oldItemIndex!=themelist->currentRow()) {

        themelist->setIcon(themelist->currentRow(),*rightMark);

        if(oldItemIndex >= 0) {

            themelist->setIcon(oldItemIndex,*noMark);

        }

        oldItemIndex = themelist->currentRow();

    }

}

/**

 * event

 */

bool ThemeSelectionList::event(QEvent *e)

{

    if((e->type()==QEvent::ShortcutOverride)||(e->type()==QEvent::WindowDeactivate)) {        

        // save old applied theme

        themelist->setCurrentRow(oldItemIndex);

        themelist->setFocus();

        setChosen(themelist->item(oldItemIndex));

        return true;

    }

    return (HbView::event(e));

}

/**

 * updateThemeList

 */

void ThemeSelectionList::updateThemeList(const QString &path)

{

    Q_UNUSED(path);

    themelist->clear();

    this->displayThemes();

}

/**

 * sendThemeName

 */

void ThemeSelectionList::sendThemeName(const QString& name)

{

    client->changeTheme(name);

}

/**

 * \internal

 */

QStringList ThemeSelectionList::rootPaths()

{

    QStringList rootDirs;

#if defined(Q_OS_SYMBIAN)

    rootDirs << "c:/resource/hb"

             << "z:/resource/hb"

             << "e:/resource/hb"

             << "f:/resource/hb";

#else

    QString envDir = qgetenv("HB_THEMES_DIR");

    if (!envDir.isEmpty())

        rootDirs << envDir;

#endif

#if defined(Q_OS_MAC)

    rootDirs << QDir::homePath() + "/Library/UI Extensions for Mobile";

#elif !defined(Q_OS_SYMBIAN)

    rootDirs << HB_RESOURCES_DIR;

#endif

    return rootDirs;

}

#ifdef THEME_CHANGER_TIMER_LOG

void ThemeSelectionList::processWhenIdle()

{    

    qDebug() << "Theme changed applied in " << timer.elapsed() << " msec";

    idleTimer->stop();

    QThread::currentThread()->setPriority(QThread::NormalPriority);    

    if (!client->isConnected()) {

        client->connectToServer();

    }

}

void ThemeSelectionList::themeChanged()

{

    idleTimer->start(0);

}

#endif //THEME_CHANGER_TIMER_LOG