hxsym_mmc_utils.cpp

来自「symbian 下的helix player源代码」· C++ 代码 · 共 155 行

/*****************************************************************************
 * chxavmisc.cpp
 * -------------
 *
 * Synopsis:
 * mmc utils for Symbian players
 *
 *
 *
 * Target:
 * Symbian OS
 *
 *
 * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
 *
 *****************************************************************************/

// Symbian includes...
#include <coeutils.h>
#include <aknenv.h>
//#include <apgcli.h>

#include <avkon.rsg>


// Includes from this project...
#include "chxavutil.h"
#include "chxavmisc.h"
#include "chxavfileutil.h"
#include "chxavmessagedialog.h"
#include "chxavcleanstring.h"
#include "chxavcleanupstack.h"

#include "realplayer.rsg"
#include "realplayer.hrh"
#include "hxsym_mmc_utils.h"
#include "hxsym_debug.h"

namespace util
{

////////////////////////////////////////////////
// prompt user for a password
//
// return true if password supplied
//
bool GetPasswordFromUserL(TDes& password, const TDesC& prompt)
{
    CAknTextQueryDialog* pDlg = CAknTextQueryDialog::NewL(password);
    // R_CFD_PASSWORD_QUERY_DIALOG
    return 0 != pDlg->ExecuteLD(R_AVP_MMC_PASSWORD_QUERY, prompt);
}

///////////////////////////////////////////////
//
TInt DoUnlockDriveUi(TInt idxDrive)
{
    TBuf<KMaxMediaPassword> pwText;
    TMediaPassword pwBuf;

    TInt err = KErrGeneral;

    CHXAvFile::DriveInfo info = CHXAvFile::GetDriveInfo(idxDrive);

    if( CHXAvFile::dsLocked == info.state )
    {
        if(CHXAvMessageDialog::DoQueryL(R_AVP_UNLOCK_MMC_QUERY)) // R_CFD_QTN_MEMC_UNLOCK_QUERY1
        {
            CHXAvCleanString pwPrompt(R_AVP_PASSWORD_QUERY_PROMPT); //R_CFD_PASSWORD_QUERY_TEXT

            for( ; ; )
            {
                pwText.Zero();

                if( GetPasswordFromUserL(pwText, pwPrompt()))
                {
                    // a password was entered; copy to media password buffer
                    CHXAvUtil::Copy8(pwText, pwBuf);

                    // attempt to unlock mmc with password
                    RFs& fs = CCoeEnv::Static()->FsSession();
                    err = fs.UnlockDrive( idxDrive, pwBuf, ETrue /* cache password*/ );
                    if(KErrNone == err)
                    {
                        // drive unlocked; now mount (important!) via lock check
                        if(CHXAvFile::IsDriveLocked(idxDrive))
                        {
                            err = KErrLocked;
                        }
                        break;
                    }
                    else
                    {
                        CHXAvMessageDialog::DoAlertErrorL(CHXAvCleanString(R_AVP_PASSWORD_INCORRECT_PASSWORD/*R_CFD_INCORRECT_PASSWORD_TEXT*/)(), true, CAknNoteDialog::ELongTimeout);
                    }
                }
                else
                {
                    // user cancelled
                    err = KErrCancel;
                    break;
                }
            }
        }
    }
    
    return err;
}

#if defined(SYMBIANPLAYER_INCLUDE_LOCK_DRIVE_UI)
//
// Debugging helper:
//
// Enable user to clear password cache and reset 
// password for current mmc
//
void DoLockDriveUiL()
{
    TBuf<KMaxMediaPassword> pwText;
    TMediaPassword pwNew, pwOld;

    if(GetPasswordFromUserL(pwText, CHXAvCleanString(R_AVP_PASSWORD_QUERY_PROMPT/*R_CFD_PASSWORD_QUERY_TEXT*/)()))
    {
        CHXAvUtil::Copy8(pwText, pwNew);
        RFs& fs = CCoeEnv::Static()->FsSession();
        // assume no password
        TInt err = fs.LockDrive( EDriveE, pwOld, pwNew, EFalse );
        if(KErrNone != err)
        {
            // assume current pw is same as that entered and try again
            CHXAvUtil::Copy8(pwText, pwOld);
            err = fs.ClearPassword(EDriveE, pwOld);
            if( KErrNone == err )
            {
                // note if pwOld == pwNew, password remains cached
                pwOld.Zero();
                err = fs.LockDrive(EDriveE, pwOld, pwNew, EFalse );
            }
        }

        if( KErrNone == err )
        {
            CHXAvMessageDialog::DoAlertInfoL(_L("MMC locked (goes into effect after reboot)"));
        }
        else
        {
            CHXAvMessageDialog::DoAlertInfoL(_L("Failed!"));
        }                   
    }
}
#endif // SYMBIANPLAYER_INCLUDE_LOCK_DRIVE_UI

} // ns util