widgets/widgetlauncher/src/WidgetLauncher.cpp
author Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
Fri, 08 May 2009 08:25:06 +0300
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permissions -rw-r--r--
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/*
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* Copyright (c) 2006, 2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*     Lauches/inform widget stub ui to display widget
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*
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*
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*/
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// INCLUDE FILES
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#include "widgetappdefs.rh"
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#include <APACMDLN.H>
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#include <s32mem.h>
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#include <e32std.h>
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#include <e32base.h>
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#include <f32file.h>
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#include <apgcli.h>
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#include <W32STD.H>
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#include <APGTASK.H>
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// CONSTANTS
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// LOCAL FUNCTION DEFINITIONS
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// RDesWriteStream
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/** 
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* Parse command line in order to launch the widget.
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*
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* The function checks the command line arguments and parses 
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* relevant information from it. Parameters are all out-params.
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* @param aUid UID of the widget.
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* @param aOperation Operation to perform.
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*/
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static void ParseCmdLineL( TUid& aUid, TUint32& aOperation );
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/** 
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* Launch or bring foreground the asked widget.
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*
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* Launch widget.
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* @param aUid UID of the widget.
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* @param aOperation Operation to perform.
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*/
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static void LaunchWidgetL( const TUid& aUid, TUint32 aOperation );
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/** 
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* Launch new widget.
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*
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* Launch new widget.
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* @param aUid UID of the widget.
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* @param aOperation Operation to perform.
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*/
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static void LaunchWidgetUIL( 
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    const TUid& aUid, 
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    const TDesC8& aMessage, 
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    TUint32 aOperation );
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//===========================================================================
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// Start the stuff.
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//===========================================================================
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void StartTheApplicationL()
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    {
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    TUid uid( TUid::Null() );
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    TUint32 operation( 0 );
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    ParseCmdLineL( uid, operation );
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    LaunchWidgetL( uid, operation );
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    }
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//===========================================================================
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// Parse command line.
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// The function checks the command line arguments to launch the widget.
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// 
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// Too bad that we can't have version number information in the beginning 
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// of the command line. Now we have to try/catch the miniview size.
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// The format is originally:
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// <UID.iUid> <url lenght> <url>
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// 
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// For miniview, we append miniview size as in 
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// <TUint32>, meaning
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//      - 0 - launch to full screen
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//      - 1 - launch to mini view
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//      - 2 - deactivate    
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//
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//===========================================================================
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void ParseCmdLineL( TUid& aUid, TUint32& aOperation )
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    {
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    CApaCommandLine* commandLine( NULL );
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    // KApaMaxCommandLine says this can be only 0x100, but we can't break the 
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    // data format.
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    TUint32 mainHTMLLen( 0 ); 
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    HBufC* mainHTML( NULL );
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    TPtr mainHTMLPtr( NULL, 0, 0 );
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    TPtrC8 data( NULL, 0 );
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    User::LeaveIfError( CApaCommandLine::GetCommandLineFromProcessEnvironment( commandLine) );
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    data.Set( commandLine->OpaqueData() );
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    RDesReadStream readStream( data );
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    // Read widget uid from opaque data
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    aUid.iUid = readStream.ReadUint32L();
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    // Read widget main html path from opaque data
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    mainHTMLLen = readStream.ReadUint32L();
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    if ( !mainHTMLLen )
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        {
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        User::Leave( KErrArgument );
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   122
        }
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   123
            
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    mainHTML = HBufC::NewLC(mainHTMLLen);
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   125
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   126
    mainHTMLPtr.Set( mainHTML->Des() );
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    readStream.ReadL(mainHTMLPtr, mainHTMLLen);
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    // Dump the URL, we don't need it anymore.    
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    CleanupStack::PopAndDestroy( mainHTML );
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   131
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    // Try to get the size.
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    TRAP_IGNORE( aOperation = readStream.ReadInt32L() );
8
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    delete commandLine;
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    commandLine = NULL;
0
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    }
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//===========================================================================
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// Launch widget.
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//===========================================================================
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//
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void LaunchWidgetL( const TUid& aUid, TUint32 aOperation )
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    {
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    __UHEAP_MARK;
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    TUid widgetAppUid( TUid::Uid( KWidgetAppUid ) );
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    RWsSession wsSession;
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    TApaTaskList taskList( wsSession );
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    HBufC8* message( HBufC8::NewLC( KWidgetUiMaxMessageLength ) );
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    TPtr8 des( message->Des() );
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    RDesWriteStream stream( des );
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    CleanupClosePushL( stream );
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    // Make the message to be sent.
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    stream.WriteUint32L( 1 );
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   159
    stream.WriteUint32L( aUid.iUid );
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    stream.WriteInt32L( aOperation );
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    CleanupStack::PopAndDestroy( &stream );
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    // Create Window server session
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    User::LeaveIfError( wsSession.Connect() );
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    CleanupClosePushL( wsSession );
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    // Get the task list
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    // Try to find out if stub ui is already running
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    TApaTask task = taskList.FindApp( widgetAppUid );
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    if ( task.Exists() )
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        {
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        // TODO make something here, or not...
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        widgetAppUid = TUid::Uid( 1 );
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        if ( aOperation == LaunchFullscreen ||
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             aOperation == WidgetSelect )
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            {
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            task.BringToForeground();
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            }
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        task.SendMessage( widgetAppUid, des );
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        }
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    else
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        {
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        // TODO CONST
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        if ( aOperation == LaunchFullscreen ||
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             aOperation == LaunchMiniview ||
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             aOperation == WidgetSelect ) //WidgetUI has died -> re-launch
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            {
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            LaunchWidgetUIL( widgetAppUid, *message, aOperation );
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   191
            }
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   192
        }
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   193
        
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   194
    CleanupStack::PopAndDestroy( 2, message );
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   195
    
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    __UHEAP_MARKEND;
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   197
    }
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   198
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//===========================================================================
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// Launch Widget UI.
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//===========================================================================
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   202
void LaunchWidgetUIL( 
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    const TUid& aUid, 
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    const TDesC8& aMessage, 
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    TUint32 aOperation )
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    {
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   207
    HBufC* document( NULL );
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   208
    CApaCommandLine* line( CApaCommandLine::NewLC() );
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    TApaAppInfo info;
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    RApaLsSession session;
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    User::LeaveIfError( session.Connect() );
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   213
    CleanupClosePushL( session );
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   214
    
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   215
    User::LeaveIfError( session.GetAppInfo( info, aUid ) );
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   216
        
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    document = HBufC::NewMaxLC( TReal( TReal( aMessage.Length() )  / 2.0 ) + 0.5 );
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parents:
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   218
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    Mem::Copy( 
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        reinterpret_cast< TUint8* >( const_cast< TUint16* >( document->Ptr() ) ),
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parents:
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   221
        aMessage.Ptr(),
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        KWidgetUiMaxMessageLength );
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   223
        
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   224
    line->SetDocumentNameL( *document );
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parents:
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   225
    line->SetExecutableNameL( info.iFullName );
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parents:
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   226
        
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    // TODO make const definitions.
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    if ( aOperation == 1 )
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   229
        {
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   230
        line->SetCommandL( EApaCommandBackground );
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   231
        }
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   232
        
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   233
    session.StartApp( *line );
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   234
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   235
    CleanupStack::PopAndDestroy( 3, line );
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   236
    }
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   237
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   238
/*
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   239
* E32Main: called by operating system to start the program
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*/
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   241
TInt E32Main(void)
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   242
    {
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    CTrapCleanup* cleanupStack = CTrapCleanup::New();
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    if (cleanupStack == NULL)
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        {
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        return -1;
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        }
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    TRAP_IGNORE(StartTheApplicationL());
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    delete cleanupStack;
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    return KErrNone;
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    }
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   257