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

**

** 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.

**

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

#ifndef HBLAYEREDSTYLELOADER_P_H

#define HBLAYEREDSTYLELOADER_P_H

#include <hbglobal.h>

#include <hbcssparser_p.h>

#include <hbstyleselector_p.h>

#include <QVector>

#include <QDir>

class HB_AUTOTEST_EXPORT HbLayeredStyleLoader

{

public:

    enum LayerPriority {

        Priority_Core,

        Priority_Theme,

        Priority_AppTheme,

        Priority_Application,

        Priority_Operator

    };

    struct Layer {

        HbStyleSelector styleSelector;

    };

    enum Concern {

        Concern_Layouts = 0,

        Concern_Colors = 1,

        // Concern_All must be last!

        Concern_All = 0xFFFF

    };

    typedef QMapIterator<LayerPriority, HbLayeredStyleLoader::Layer> LayerIterator;

    typedef QMap<LayerPriority, Layer> PriorityLayerMap;

    typedef QMap<Concern, HbLayeredStyleLoader> ConcernStacks;

public:

    static HbLayeredStyleLoader *getStack(Concern con);

    inline static bool sharingNeeded(LayerPriority layerPriority){

        return (layerPriority >= Priority_AppTheme && layerPriority <=  Priority_Application )? false : true;

    }

    int load(const QString &fileName, LayerPriority priority);

    int load(QIODevice *device, LayerPriority priority);

    QVector<int> loadAll(const QStringList &files, LayerPriority priority);

    QVector<int> loadDir(const QString &dirPath, QDir::SortFlags sort, LayerPriority priority);

    bool unload(int handle, LayerPriority priority);

    void unload(const QVector<int> &handles,  LayerPriority priority);

    void clear();

    void clear(LayerPriority priority);

public:

    bool hasOrientationSpecificStyleRules(HbStyleSelector::NodePtr node) const;

    HbVector<HbCss::Declaration> declarationsForNode(HbStyleSelector::NodePtr node,

            const Qt::Orientation orientation, const char *extraPseudo = 0) const;

    HbVector<HbCss::StyleRule> styleRulesForNode(HbStyleSelector::NodePtr node,

            const Qt::Orientation orientation) const;

    void variableRuleSets(QHash<quint32, HbCss::Declaration> *variables) const;

protected:

    void updateLayersListIfRequired(LayerPriority priority);

    void init(Concern con);

    QList<LayerPriority> mUsedLayers;

private:

    PriorityLayerMap mStyleLayers;

    Concern mConcern;

    mutable QHash<quint32, HbCss::Declaration> mDefaultVariables;

#ifdef HB_CSS_INSPECTOR

    HbCss::StyleSheet *mCurrentSheet;

#endif

    HbVector<uint> *mServerHbCssMisses;

};

#endif // HBLAYEREDSTYLELOADER_P_H