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

**

** 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 HbServers 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 "hbthemewatcher_symbian_p.h"

#include "hbthemeserver_symbian_p_p.h"

#include "hbthemeutils_p.h"

#include <QFile>

#include <e32property.h>

#include <e32base.h>

#include <e32svr.h>

// Publish/Subscribe themeRequestProp specific

static _LIT_SECURITY_POLICY_PASS(KAllowAllPolicy);

static _LIT_SECURITY_POLICY_C1(KThemeChangerPolicy,ECapabilityWriteDeviceData);

CHbThemeWatcher::CHbThemeWatcher(HbThemeServerPrivate& aObserver) : CActive(EPriorityStandard), 

                                                                    iObserver(aObserver)

{ 

    CActiveScheduler::Add(this); 

}

void CHbThemeWatcher::ConstructL()

{

    User::LeaveIfError(iFs.Connect());

}

CHbThemeWatcher* CHbThemeWatcher::NewL(HbThemeServerPrivate& aObserver)

{

    CHbThemeWatcher* self = new (ELeave) CHbThemeWatcher(aObserver);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

CHbThemeWatcher::~CHbThemeWatcher()

{

    Cancel();

    iFs.Close();

}

void CHbThemeWatcher::startWatchingL(const QString &file)

{ 

    // Cancel ongoing watch

    if (IsActive()) {

        Cancel();

    }

    iFile = file;

    TBuf<256> fileToWatch(iFile.utf16());

    iFs.NotifyChange(ENotifyAll, iStatus, fileToWatch); 

    SetActive();

}

void CHbThemeWatcher::RunL()

{

    if (iStatus != KErrNone) {

        return;

    }

    if (QFile::exists(iFile)) {

        // theme exists continue watching

        TBuf<256> fileToWatch(iFile.utf16());

        iFs.NotifyChange(ENotifyAll, iStatus, fileToWatch);

        SetActive();

        return;

    }

    // theme doesn't exist, change active theme to default

}

void CHbThemeWatcher::DoCancel()

{

    iFs.NotifyChangeCancel(iStatus);

}

CHbThemeChangeNotificationListener* CHbThemeChangeNotificationListener::NewL(HbThemeServerPrivate& aObserver)

{

    CHbThemeChangeNotificationListener* self = new (ELeave) CHbThemeChangeNotificationListener(aObserver);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

CHbThemeChangeNotificationListener::CHbThemeChangeNotificationListener(HbThemeServerPrivate& aObserver)

    :CActive(EPriorityStandard),iObserver(aObserver)

{

}

void CHbThemeChangeNotificationListener::ConstructL()

{

    TInt err = RProperty::Define( KServerUid3, KNewThemeForThemeChanger, RProperty::ELargeText, KAllowAllPolicy, KThemeChangerPolicy );

     if ( err != KErrAlreadyExists ) {

         User::LeaveIfError( err );

     }

    err = themeRequestProp.Attach(KServerUid3, KNewThemeForThemeChanger );

    User::LeaveIfError(err);

    CActiveScheduler::Add(this);

}

CHbThemeChangeNotificationListener::~CHbThemeChangeNotificationListener()

{

    stopListening();

}

void CHbThemeChangeNotificationListener::startListeningL()

{

    if (IsActive()) {

         return; //do nothing if already listening

    }

    User::LeaveIfError(themeRequestProp.Attach(KServerUid3,KNewThemeForThemeChanger));

    //Subscribe for updates

    themeRequestProp.Subscribe(iStatus);

    SetActive();

}

void CHbThemeChangeNotificationListener::stopListening()

{

     Cancel(); // cancel

     if(IsActive()) { // only if already listening

        themeRequestProp.Close(); // Close the handle since it is not needed anymore

   }

}

/*

 * Returns TRUE if parsing succeeded, FALSE otherwise

 */

bool CHbThemeChangeNotificationListener::parseData(const TDesC& requestData, HbThemeServerRequest& etype, TDes& data)

{

    TInt result = 0;

    const TChar delimiter = ':';

    // initialize return value as failed

    bool bSuccess = false;

    result = requestData.Locate( delimiter );

    if( KErrNotFound != result ) {

        TInt len = requestData.Length();

        const TDesC& typestr = requestData.Mid(0, result);

        TLex atype(typestr);

        TInt iType;

        atype.Val( iType );

        etype = static_cast<HbThemeServerRequest>(iType);

        data.Copy( requestData.Mid( result + 1, len - result - 1 ) );

        bSuccess = true;

    } else {

        bSuccess = false;

    }

    return bSuccess;

}

static const TInt KThemeChangeDataBufferSize = 256;

void CHbThemeChangeNotificationListener::RunL()

{

    // Subscribe first to make sure we don't miss any

    // when handling this one.

    themeRequestProp.Subscribe(iStatus);

    SetActive();

    TBuf<KThemeChangeDataBufferSize> requestData;

    TInt ret = themeRequestProp.Get(requestData);

    switch (ret) {

        case KErrNone:

            {

                QString qrequestData((QChar*)requestData.Ptr(),requestData.Length());

                HbThemeServerRequest etype = EInvalidServerRequest;

                TBuf<KThemeChangeDataBufferSize> data;

                ///Parse the data from the Publisher

                bool bSuccess = parseData( requestData, etype, data);

                if( bSuccess && EThemeSelection == etype) {

                    QString str((QChar*)data.Ptr(), data.Length());

                    str = str.trimmed();

                    iObserver.HandleThemeSelection( str );

                }

            }

            break;

        case KErrPermissionDenied:

            qDebug() << "KErrPermissionDenied";

            break;

        case KErrNotFound:

            qDebug() << "KErrNotFound";

            break;

        case KErrArgument:

            qDebug() << "KErrArgument";

            break;

        case KErrOverflow:

            qDebug() << "KErrOverflow";

            break;

    }

}

void CHbThemeChangeNotificationListener::DoCancel()

{

    themeRequestProp.Cancel();

}