/*

 * 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:Implements Symbian functionality to get message pdu details.

 *

 */

#include "msgcharcounter_p.h"

#include <smuthdr.h>

#include <gsmuset.h>

#include <gsmumsg.h>

#include <txtetext.h>

#include <txtrich.h>

#include "msgcharcounter.h"

#include "s60qconversions.h"

enum MsgCharSupport

{

    msgCharSupportFull = 0, msgCharSupportReduced

};

// ---------------------------------------------------------------------------

// Default Constructor ( 1st phase )

// ---------------------------------------------------------------------------

//

MsgCharCounterPrivate::MsgCharCounterPrivate(MsgCharCounter *msgCharCounter) :

    q_ptr(msgCharCounter)

{

    // No implementation required

}

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

MsgCharCounterPrivate::~MsgCharCounterPrivate()

{

    q_ptr = NULL;

    if (mParaFormatLayer)

    {

        delete mParaFormatLayer;

        mParaFormatLayer = NULL;

    }

    if (mCharFormatLayer)

    {

        delete mCharFormatLayer;

        mCharFormatLayer = NULL;

    }

    if (mRichText)

    {

        delete mRichText;

        mRichText = NULL;

    }

    if (mSmsHeader)

    {

        delete mSmsHeader;

        mSmsHeader = NULL;

    }

}

// ---------------------------------------------------------------------------

// Two-phased constructor.

// ---------------------------------------------------------------------------

//

MsgCharCounterPrivate* MsgCharCounterPrivate::newL(

    MsgCharCounter *msgCharCounter)

{

    MsgCharCounterPrivate* self = new (ELeave) MsgCharCounterPrivate(

        msgCharCounter);

    CleanupStack::PushL(self);

    self->constructL();

    CleanupStack::Pop(); // self;

    return self;

}

// ---------------------------------------------------------------------------

// EPOC default constructor for performing 2nd stage construction

// ---------------------------------------------------------------------------

//

void MsgCharCounterPrivate::constructL()

{

    mParaFormatLayer = CParaFormatLayer::NewL();

    mCharFormatLayer = CCharFormatLayer::NewL();

    mRichText = CRichText::NewL(mParaFormatLayer, mCharFormatLayer);

    mSmsHeader = CSmsHeader::NewL(CSmsPDU::ESmsSubmit, *mRichText);

}

// ---------------------------------------------------------------------------

// To Set encoding settings like encoding type, character support and

// alternative encoding if any.

// ---------------------------------------------------------------------------

//

void MsgCharCounterPrivate::setEncodingSettings(bool unicodeMode,

    int alternativeEncodingType, int charSupportType)

{

    TSmsUserDataSettings smsSettings;

    CSmsMessage& smsMsg = mSmsHeader->Message();

    mUnicodeMode = unicodeMode;

    mCharSupportType = charSupportType;

    mAlternativeEncodingType = (TSmsEncoding) alternativeEncodingType;

    if (mUnicodeMode)

    {

        smsSettings.SetAlphabet(TSmsDataCodingScheme::ESmsAlphabetUCS2);

    }

    else

    {

        smsSettings.SetAlphabet(TSmsDataCodingScheme::ESmsAlphabet7Bit);

    }

    smsSettings.SetTextCompressed(EFalse);

    smsMsg.SetUserDataSettingsL(smsSettings);

    //First try without any alternate encoding

    smsMsg.SetAlternative7bitEncoding(ESmsEncodingNone);

}

// ---------------------------------------------------------------------------

// To get PDU Info: extracts details of number of PDUs, number of remaining

// chars in last PDU and encoding types used.

// ---------------------------------------------------------------------------

//

void MsgCharCounterPrivate::getNumPDUs(const QString &buf,

    int &numOfRemainingChars, int &numOfPDUs, bool &unicodeMode,

    int &alternativeEncodingType)

{

    TInt numOfUnconvChars;

    TInt numOfDowngradedChars;

    TInt isAltEncSupported;

    TSmsEncoding currentAlternativeEncodingType;

    CSmsMessage& smsMsg = mSmsHeader->Message();

    // need to set the input buffer to SMS buffer through iRichText

    // (which is reference to SMS Buffer object)

    HBufC* buffer = S60QConversions::qStringToS60Desc(buf);

    CleanupStack::PushL(buffer);

    mRichText->Reset();

    mRichText->InsertL(0, *buffer);

    //call SMS stack API to get PDU info

    smsMsg.GetEncodingInfoL(numOfPDUs, numOfUnconvChars, numOfDowngradedChars,

        numOfRemainingChars);

    //Algo to switch to Unicode if required

    while ( (numOfUnconvChars || numOfDowngradedChars) && !mUnicodeMode)

    {

        currentAlternativeEncodingType = smsMsg.Alternative7bitEncoding();

        if (currentAlternativeEncodingType != mAlternativeEncodingType)

        {

            //try with this new alternative encoding type

            isAltEncSupported = smsMsg.SetAlternative7bitEncoding(

                mAlternativeEncodingType);

            if (isAltEncSupported == KErrNotSupported)

            {

                // if required alternative encoding plugin is not supported,

                // retain the existing encoding mechanism.

                mAlternativeEncodingType = currentAlternativeEncodingType;

                continue;

            }

        }

        else if (numOfUnconvChars || (MsgCharSupport) mCharSupportType

                == msgCharSupportFull)

        {

            //switch to Unicode

            //mUnicodeMode = ETrue;

            setEncodingSettings(ETrue, ESmsEncodingNone, mCharSupportType);

        }

        else

        {

            //Get out of while loop and return the results

            break;

        }

        //get the PDU info with new settings

        mRichText->Reset();

        mRichText->InsertL(0, *buffer);

        smsMsg.GetEncodingInfoL(numOfPDUs, numOfUnconvChars,

            numOfDowngradedChars, numOfRemainingChars);

    } // end of while

    CleanupStack::PopAndDestroy(buffer);

    unicodeMode = mUnicodeMode;

    alternativeEncodingType = mAlternativeEncodingType;

    if (mUnicodeMode)

    {

        // In case of Unicode mode, SMS Stack returns number of available free

        // User Data units. Need to convert them w.r.t characters.

        // Each char takse 2 UD units.

        numOfRemainingChars = numOfRemainingChars / 2;

    }

}

//EOF