/*

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

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0""

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:  

 *   

 */

#include "cpthemeinfo.h"

#include "cpthemeutil.h"

#include <QStringList>

#include <QSettings>  

#include <QFileInfoList>

#include <QDir>

#include <QList>

#include <hbicon.h>

#include <hbinstance.h>

#include <restricted/hbthemeservices_r.h>

/*!

 * This class provides utility function to get Theme information.  

 */

#if defined(Q_OS_SYMBIAN)

#include <e32std.h>

#include <centralrepository.h>

        static const TUid KServerUid3={0x20022E82};

        static const TUint32 KDefaultThemeNameKey = 0x2;

#endif

    //Location of theme preview and background icons.

    static const QString KPreviewThumbnailNVG = "/scalable/qtg_graf_theme_preview_thumbnail.nvg";

    static const QString KPreviewThumbnailSVG = "/scalable/qtg_graf_theme_preview_thumbnail.svg";

    static const QString KBackgroundPrtNVG    = "/scalable/qtg_graf_screen_bg_prt.nvg";

    static const QString KBackgroundLscNVG    = "/scalable/qtg_graf_screen_bg_lsc.nvg";

    static const QString KBackgroundPrtSVG    = "/scalable/qtg_graf_screen_bg_prt.svg";

    static const QString KBackgroundLscSVG    = "/scalable/qtg_graf_screen_bg_lsc.svg";

/*

 * Builds a CpThemeInfo object given theme path and theme name.  It creates the name and 

 * preview icons for the object.  Creates a new CpThemeInfo objects. Caller takes ownership.

 * Returns NULL if can't build the object.

 */

CpThemeInfo* CpThemeUtil::buildThemeInfo(const QString& themePath, const QString& themeName)

{

    CpThemeInfo *themeInfo = new CpThemeInfo();

    QString iconPath;

    QString name = themeName;

    QString hidden = "";

    //first look into the index.theme file to get theme information.

    if(QFileInfo(themePath + "/index.theme").exists()) {

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

        iniSetting.beginGroup("Icon Theme");

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

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

        iconPath = iniSetting.value("PreviewThumbnailPath").toString();

        iniSetting.endGroup();

    }

    if(name.isEmpty() || (hidden == "true") ||( hidden == "")) {

        return NULL;

    }

    themeInfo->setName(name);

    themeInfo->setItemType(CpThemeInfo::ThemeListItemType_default);

    themeInfo->setItemData(themePath);

    //Get the icons. Logic is as follow:

    /* 1. If the icon path is in index.theme and the icon exist, use it.

     * 2. Otherwise look for the icon in the theme folder.

     * 2. If preview icon doesn't exist, use background icon.

     * 3. If no icon exist (background or preview),use default theme icon.

     */

    if(iconPath.isEmpty() || !QFileInfo(themePath + iconPath).exists()){

        //Set thumbnail

        HbIcon themeIcon = getPreviewIcon(themePath);

        if(themeIcon.isNull()){

            QString defaultThemePath = defaultTheme();

            if(!defaultThemePath.isEmpty()) {

                themeIcon = getPreviewIcon(defaultThemePath);

            }

        }

        themeInfo->setIcon(themeIcon);

    } else {

        themeInfo->setIcon(HbIcon(themePath + iconPath));

    }

    return themeInfo;

}

/*!

 * given a path to the theme, returns the preview icon or just a Null icon

 * if it doesn't exist.

 */

HbIcon CpThemeUtil::getPreviewIcon(const QString& themePath)

{

    HbIcon themeIcon;

    if(QFileInfo(themePath + KPreviewThumbnailNVG).exists()){

        themeIcon = HbIcon(themePath + KPreviewThumbnailNVG);

    }else if(QFileInfo(themePath + KPreviewThumbnailSVG).exists()){

        themeIcon = HbIcon(themePath + KPreviewThumbnailSVG);

    }else if(QFileInfo(themePath + KBackgroundPrtNVG).exists()){

        themeIcon = HbIcon(themePath + KBackgroundPrtNVG);

    }else if(QFileInfo(themePath + KBackgroundPrtSVG).exists()){

        themeIcon = HbIcon(themePath + KBackgroundPrtSVG);

    }

    return themeIcon;

}

/*! Creates a list of CpThemeInfo objects representing theme information.

 *  

 */

QList<CpThemeInfo> CpThemeUtil::buildThemeList()

{

    QList<CpThemeInfo> themeList; 

    QList<QPair<QString, QString> > mThemesPathList = availableThemes();

    QPair<QString, QString>pair;

    foreach (pair, mThemesPathList) {

        QDir themeDir;

        QString name = pair.first;

        QString path = pair.second;

        themeDir.setPath( path ) ;

        CpThemeInfo* themeInfo;

        if(themeDir.exists("index.theme") &&

          (themeDir.exists("scalable") || themeDir.exists("pixmap") )) {

            themeInfo = buildThemeInfo(path, name);

            if(themeInfo && !themeInfo->name().isEmpty()) {

                themeList.append(*themeInfo);

            }

        }

    }

    qSort( themeList );

    return themeList;

}

/*!

 * Returns the default theme path. 

 */

QString CpThemeUtil::defaultTheme()

{

    //static because default theme doesn't change.

    static QString defaultThemePath("");

    if(defaultThemePath.isEmpty()) {

#ifdef Q_OS_SYMBIAN

        CRepository *repository = 0;

        TRAP_IGNORE(repository = CRepository::NewL(KServerUid3));

        if (repository) {

            TBuf<256> value;

            if (KErrNone == repository->Get((TUint32)KDefaultThemeNameKey, value)) {

                QString qvalue((QChar*)value.Ptr(), value.Length());

                defaultThemePath = qvalue.trimmed();

            }

            value.Zero();

           delete repository;

        }

#endif

    }

    return defaultThemePath;

}

const QStringList CpThemeUtil::themeDirectories(const QList<CpThemeInfo>& themeInfoList)

{

    QStringList themeDirs;

    foreach(const CpThemeInfo& themeInfo, themeInfoList) {

        QDir themePath(themeInfo.itemData());

        QString topDir;

        if(themePath.cdUp()) {

            topDir = themePath.path();

            if(!themeDirs.contains(topDir)) {

                themeDirs.append(topDir);

            }

        }

    }

    return themeDirs;

}

const QList< QPair< QString, QString > > CpThemeUtil::availableThemes( )

{

    QList<QPair<QString, QString> > result = HbThemeServices::availableThemes();

    return result;

}