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

**

** 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 "hbicontheme_p.h"

#include "hbthemeutils_p.h"

#include <hbinstance.h>

#include "hbtheme.h"

#include <QtCore/QDebug>

#include <QtCore/QDir>

#include <hbstandarddirs_p.h>

#include <hbiniparser_p.h>

#define THEME_INDEX_FILE "index.theme"

class HbIconThemePrivate

{

public:

    HbIconThemePrivate();

    ~HbIconThemePrivate();

    QString m_theme;

    QStringList m_dirList;

    QString m_description;

    bool loaded;

    void loadThemeDescriptionFile(const QString &themePath, int priority);

    void loadThemeDescriptionFiles(const QString &theme);

    bool addBaseThemePath();

};

void HbIconThemePrivate::loadThemeDescriptionFiles(const QString &theme)

{

    const QString indextheme(THEME_INDEX_FILE);

    QString pathToTheme;

    QMap<int, QString> maplist = HbThemeUtils::constructHierarchyListWithPathInfo(

        QString(), theme, Hb::IconResource);

    QMapIterator<int, QString> i(maplist);

     i.toBack();

     while (i.hasPrevious()) {

         i.previous();

         pathToTheme = HbStandardDirs::findResource(i.value() + indextheme, Hb::IconResource);

         if (!pathToTheme.isEmpty()) {

             loadThemeDescriptionFile(pathToTheme, i.key());

         }

     }

    if (!addBaseThemePath()) {

         qDebug() << "Can't find base theme";

     }

     loaded = true;

}

HbIconThemePrivate::HbIconThemePrivate() : loaded(false)

{

}

HbIconThemePrivate::~HbIconThemePrivate()

{

}

void HbIconThemePrivate::loadThemeDescriptionFile(const QString &themePath, int priority)

{

    HbIniParser iniParser;

    QFile themeFile(themePath);

    if (!themeFile.open(QIODevice::ReadOnly) || !iniParser.read(&themeFile)) {

        qDebug() << "Can't access file : " << themePath;

        return;

    }

    if (priority == HbLayeredStyleLoader::Priority_Theme) {

        m_description = iniParser.value("Icon Theme", "Comment");

#ifdef Q_OS_SYMBIAN

        m_description = m_description.left(m_description.indexOf("\n", 0));

#endif

    }

    QString directories = iniParser.value("Icon Theme", "Directories");

    QStringList dirList = directories.split( ',', QString::SkipEmptyParts );

    QString indexThemeDir(themePath);

    indexThemeDir.chop(sizeof(THEME_INDEX_FILE) - 1);

    foreach (const QString &str, dirList) {

        m_dirList.append(QString(indexThemeDir + str + '/'));

    }

}

bool HbIconThemePrivate::addBaseThemePath()

{

    HbIniParser iniParser;

    const HbThemeInfo &baseThemeInfo = HbThemeUtils::baseTheme();

    QString baseThemePath = baseThemeInfo.rootDir + "/themes/icons/" + baseThemeInfo.name + "/"THEME_INDEX_FILE;

    // Parse it

    QFile baseThemeFile(baseThemePath);

    if (!baseThemeFile.open(QIODevice::ReadOnly) || !iniParser.read(&baseThemeFile)) {

        qDebug() << "Can't access file";

        return false;

    }

    if (m_theme == baseThemeInfo.name) {

        m_description = iniParser.value("Icon Theme", "Comment");

#ifdef Q_OS_SYMBIAN

        m_description = m_description.left(m_description.indexOf("\n", 0));

#endif

    }

    //Read parameters

    QString directories = iniParser.value("Icon Theme", "Directories");

    QStringList dirList = directories.split(',', QString::SkipEmptyParts);

    baseThemePath.chop(sizeof(THEME_INDEX_FILE) - 1);

    // Save paths

    foreach (const QString &str, dirList) {

        m_dirList.append(QString(baseThemePath + str + '/'));

    }

    return true;

}

/*!

    \class HbIconTheme

    \brief HbIconTheme gives access to icon themes and stores icon theme properties 

           according to the Freedesktop Icon Theme Specification

*/

HbIconTheme::HbIconTheme()

    : d(new HbIconThemePrivate())

{

}

HbIconTheme::~HbIconTheme()

{

    delete d;

}

void HbIconTheme::setCurrentTheme(const QString &theme)

{

    if (d->m_theme != theme) {

        d->m_theme = theme;

        d->m_dirList.clear();

        d->loaded = false;

    }

}

/**

 * Returns the name id and directory string of the current theme.

 */

QString HbIconTheme::currentTheme() const

{

    return d->m_theme;

}

/**

 * List of valid subdirectories of a theme

 */

QStringList HbIconTheme::dirList() const

{ 

    if (!d->loaded) {

        d->loadThemeDescriptionFiles(d->m_theme);

    }

    return d->m_dirList;

}

QString HbIconTheme::description() const

{

    if (!d->loaded) {

        d->loadThemeDescriptionFiles(d->m_theme);

    }

    return d->m_description;

}

void HbIconTheme::clearDirList()

{

    d->m_dirList.clear();

    d->loaded = false;

}

void HbIconTheme::emitUpdateIcons(const QStringList &fileNames)

{

    emit iconsUpdated(fileNames);

}