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

**

** 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 "hbeffectcontroller_p.h"

#include "hbeffectfxmldata_p.h"

#include "hbeffectxmlparser_p.h"

#include "hbeffectdef_p.h"

#include "hbeffecttheme_p.h"

#include "hbinstance.h"

#include "hbiconloader_p.h"

#include "hbtheme.h"

#include "hbtheme_p.h"

#include "hbthemeclient_p.h"

#include <QBuffer>

#include <QDir>

#include <QFile>

#include <QDebug>

/*

  \class HbEffectController hbeffectcontroller.h

  \brief HbEffectController is used to read and store effects data. 

*/

/* 

   Constructs a HbEffectController.

*/

HbEffectController::HbEffectController()

    : mParser(0),

      mShared(false),

      mSharingSet(false)

{

}

/* 

   Destructor.

*/

HbEffectController::~HbEffectController()

{

    delete mParser;

}

HbEffectFxmlData HbEffectController::fetchFxmlData(

    const QString &componentType,

    QGraphicsItem *component,

    const QString &effectEvent,

    bool shared ) const

{

    Q_UNUSED(shared); // not yet needed since we have a list of added items in local process

    int componentTypeMatchIndex = -1;

    // Find the definition for the component

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

        const HbEffectInfo &info = mEffectEntries.at(i);

        // If found a definition matching the graphics item, return that.

        if (info.item() // not null

            && info.item() == component // matches the component

            && info.inUse() // the effect is in use (not removed)

            && info.effectEvent() == effectEvent) // matches the event

        {

            // sharing support -  if it's shared get the FxML data from server and return the object

            // with parsed FxML data

            if( info.shared() ) {

                HbEffectFxmlData *dataFromSrv = HbThemeClient::global()->getSharedEffect(info.mDefFileFullPath);

                if(dataFromSrv) {

                    return *dataFromSrv;

                }

            } else {

                return info.effectData();

            }

        }

        // If found a definition matching the component type, mark index

        // The whole list is still scanned for a match for the graphics item. This is

        // needed to be able to override components effects for one graphics item.

        else if (!info.componentType().isEmpty() && info.componentType() == componentType &&

                 info.inUse() && info.effectEvent() == effectEvent) {

            componentTypeMatchIndex = i;

        }

    }

    if (componentTypeMatchIndex >= 0) {

        const HbEffectInfo &info = mEffectEntries.at(componentTypeMatchIndex);

        if ( info.shared() ) {

            HbEffectFxmlData *dataFromSrv =

                HbThemeClient::global()->getSharedEffect(info.mDefFileFullPath);

            if(dataFromSrv) {

                return *dataFromSrv;

            }

        } else {

            return mEffectEntries.at(componentTypeMatchIndex).effectData();

        }

    }

    return HbEffectFxmlData();

}

bool HbEffectController::addFXML(const QString &componentType, const QString &filePath, const QString &effectEvent,

                                 bool shared)

{

    return addEffectDefinitionFile(componentType, 0, filePath, effectEvent, shared);

}

bool HbEffectController::addFXML(QGraphicsItem *item, const QString &filePath, const QString &effectEvent,

                                 bool shared)

{

    return addEffectDefinitionFile(QString(), item, filePath, effectEvent, shared);

}

void HbEffectController::removeFXML(const QString &componentType, const QString &filePath, const QString &effectEvent)

{

    QString fullPath = expandFileName(filePath);

    for (int i = mEffectEntries.count() - 1; i >= 0; i--) {

        const HbEffectInfo &info = mEffectEntries[i];

        if (info.componentType() == componentType &&

            info.xmlFileFullPath() == fullPath &&

            info.effectEvent() == effectEvent)

        {

            // Remove the definition for the given component type

            mEffectEntries.removeAt(i);

        }

    }

}

void HbEffectController::removeFXML(QGraphicsItem *item, const QString &filePath, const QString &effectEvent)

{

    QString fullPath = expandFileName(filePath);

    for (int i = mEffectEntries.count() - 1; i >= 0; i--) {

        const HbEffectInfo &info = mEffectEntries[i];

        if (info.item() == item &&

            info.xmlFileFullPath() == fullPath &&

            info.effectEvent() == effectEvent)

        {

            // Remove the definition for the given item

            mEffectEntries.removeAt(i);

        }

    }

}

void HbEffectController::removeFXML(QGraphicsItem *item)

{

    for (int i = mEffectEntries.count() - 1; i >= 0; i--) {

        const HbEffectInfo &info = mEffectEntries[i];

        if (info.item() == item) {

            // Remove the definition for the given item

            mEffectEntries.removeAt(i);

        }

    }

}

QList<HbEffectInfo> HbEffectController::effectEntries() const

{

    return mEffectEntries;

}

void HbEffectController::setSharing(bool enabled)

{

    mShared = enabled;

    mSharingSet = true;

}

void HbEffectController::unsetSharing()

{

    mSharingSet = false;

}

QString HbEffectController::expandFileName(const QString &fn, bool *fromTheme, bool *shared)

{

    // Sharing not supported if the file is in Qt resource.

    if (fn.startsWith(":/") && shared && *shared) {

        *shared = false;

        return fn;

    } else {

        // Try the theme, will return the same name if not found in the theme.

        bool temp;

    }

}

bool HbEffectController::addEffectDefinitionFile(

    const QString &componentType, QGraphicsItem *item,

    const QString &fileName, const QString &effectEvent, bool shared)

{

    if (mSharingSet) {

        shared = mShared;

    }

    // If client is not connected due to any reason, any kind of sharing is not possible

    if ( !HbThemeClient::global()->clientConnected() ) {

        shared = mShared = mSharingSet = false;

    }

    bool fromTheme = false;

    QString filePath = expandFileName(fileName, &fromTheme, &shared);

    // Check if there's already a definition parsed for given componentType or item

    int indexForSetInUseWhenFail = -1;

    for (int i = 0, ie = mEffectEntries.count(); i != ie; ++i) {

        // non-const reference needed here to modify the actual data item

        HbEffectInfo &info = mEffectEntries[i];

        if ((item && info.item() == item)

            || (!componentType.isEmpty() && info.componentType() == componentType))

        {

            if (info.effectEvent() == effectEvent) {    

                if (info.xmlFileFullPath() == filePath) {

                    // parsed already, just set in use

                    info.mInUse = true;

                    return true;

                } else {

                    // New definition replaces this one, so mark this 'not used'.

                    info.mInUse = false;

                    // We may need to set the in-use flag back to true if file

                    // access fails, so store the index.

                    indexForSetInUseWhenFail = i;

                }

            }

        }

    }

    if ( shared ) {

        if (!HbThemeClient::global()->addSharedEffect(filePath)) {

            // Themeserver failed, try to parse locally.

            shared = false;

        }

    }

    if (!mParser && !shared) {

        mParser = new HbEffectXmlParser;

    }

    HbEffectInfo effectEntry;

    effectEntry.mComponentType = componentType;

    effectEntry.mItem = item;

    effectEntry.mInUse = true;

    effectEntry.mFromTheme = fromTheme;

    effectEntry.mDefFileFullPath = filePath;

    effectEntry.mEffectEvent = effectEvent;

    effectEntry.mShared = shared;

    if (!shared) {

        HbEffectFxmlData fxmlData;

        QFile file(filePath);

        if (!file.open(QFile::ReadOnly | QFile::Text)) {

            qWarning("HbEffect: Opening of %s failed", qPrintable(filePath));

            if (indexForSetInUseWhenFail >= 0) {

                mEffectEntries[indexForSetInUseWhenFail].mInUse = true;

            }

            return false;

        }

        mParser->read(&file, &fxmlData);

        file.close();

        if (mParser->error() != QXmlStreamReader::NoError) {

            qWarning() << "HbEffect: Parsing of file" << qPrintable(filePath) << "failed:"

                       << mParser->errorString();

            if (indexForSetInUseWhenFail >= 0) {

                mEffectEntries[indexForSetInUseWhenFail].mInUse = true;

            }

            return false;

        }

        effectEntry.setEffectData(fxmlData);

    }

    mEffectEntries.append(effectEntry);

    return true;

}