taskswitcher/server/src/tsscreenshotprovider.cpp
author hgs
Wed, 06 Oct 2010 16:00:22 +0300
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child 127 7b66bc3c6dc9
permissions -rw-r--r--
201039_01
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/*
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* Copyright (c) 2009 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 "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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*
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*/
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#include <s32mem.h>
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#include "tswindowgroupsmonitor.h"
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#include "tsrunningapp.h"
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#include "tsrunningappstorage.h"
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#include "tsscreenshotprovider.h"
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#include "tstaskmonitorglobals.h"
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#include "tsscreenshotmsg.h"
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#include "tsidlist.h"
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const TUid KPluginUID = {0x200267AE};
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const TInt KSkippedApp [] = {0x20022F35 /* <-- hsapplication */,
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                             0x100058F3 /* <-- sysapp*/};
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// -----------------------------------------------------------------------------
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//
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// -----------------------------------------------------------------------------
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//
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CTsScreenshotProvider* CTsScreenshotProvider::NewL( MTsDataStorage& aStorage,
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                                                    MTsWindowGroupsMonitor& aMonitor)
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    {
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    CTsScreenshotProvider *self = new (ELeave)CTsScreenshotProvider(aStorage, aMonitor);
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// -----------------------------------------------------------------------------
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CTsScreenshotProvider::CTsScreenshotProvider( MTsDataStorage& aStorage,
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                                              MTsWindowGroupsMonitor& aMonitor)
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:
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    iStorage(aStorage),
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    iMonitor(aMonitor)
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    {
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    //No implementation required
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    }
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// -----------------------------------------------------------------------------
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void CTsScreenshotProvider::ConstructL()
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    {
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    BaseConstructL(KPluginUID, KNullDesC8);
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    iCache = CTsIdList::NewL();
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    iMonitor.SubscribeL(*this);
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    }
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// -----------------------------------------------------------------------------
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CTsScreenshotProvider::~CTsScreenshotProvider()
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    {
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    iMonitor.Cancel(*this);
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    delete iCache;
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    }
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// -----------------------------------------------------------------------------
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void CTsScreenshotProvider::HandleWindowGroupChanged(
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                                  MTsResourceManager &aResources, 
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                                  const MTsRunningApplicationStorage& aStorage)
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    {
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    TRAP_IGNORE(HandleWindowGroupChangedL(aResources, aStorage);)
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    }
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// -----------------------------------------------------------------------------
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/**
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 * Retrieve list of applications that shouldn't be displayed in taskswitcher 
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 * and send it to module responsible for screenshot taking.  
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 * Interface implementation.
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 * @see MTsWindowGroupsObserver::HandleWindowGroupChangedL
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 */
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void CTsScreenshotProvider::HandleWindowGroupChangedL(
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                                   MTsResourceManager& /*aResources*/, 
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                                   const MTsRunningApplicationStorage& aStorage)
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    {
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    const TInt count(sizeof( KSkippedApp ) / sizeof(TInt));
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    CTsIdList* list = CTsIdList::NewLC();
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    for( TInt allowed(0); allowed < aStorage.Count(); ++allowed )
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        {
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        if(!aStorage[allowed].IsHiddenL())
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            {
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            TBool isBlocked(EFalse);
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            for( TInt blocked(0); !isBlocked && blocked < count; ++blocked )
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                {
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                isBlocked = (KSkippedApp[blocked] == aStorage[allowed].UidL().iUid);
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                }
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            if(!isBlocked)
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                {
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                list->AppendL(aStorage[allowed].WindowGroupId());
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                }
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            }
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        }
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    if( *iCache != *list )
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        {
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        RBuf8 message;
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        CleanupClosePushL(message);
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        message.CreateL(list->Size() + sizeof(TInt));
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        RDesWriteStream stream;
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        CleanupClosePushL(stream);
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        stream.Open(message);
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        stream.WriteInt32L(AllowedWindowGroups);
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        stream << (*list);
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        CleanupStack::PopAndDestroy(&stream);
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        SendMessage(message);
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        CleanupStack::PopAndDestroy(&message);
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        }
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    delete iCache;
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    iCache = list;
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    CleanupStack::Pop(list);
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    }
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// -----------------------------------------------------------------------------
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void CTsScreenshotProvider::HandleMessage( const TDesC8& aMsg )
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    {
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    TRAP_IGNORE( HandleMessageL( aMsg ) );
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    }
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// -----------------------------------------------------------------------------
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void CTsScreenshotProvider::HandleMessageL( const TDesC8& aMsg )
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    {
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    RDesReadStream msgStream( aMsg );
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    CleanupClosePushL( msgStream );
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    switch ( msgStream.ReadInt32L() ) 
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        {
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        case RegisterScreenshotMessage:
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            {
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            //parse msg to ACK provider ASAP and be sure that bitmap still exists
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            CTsScreenshotMsg* screenshotMsg = CTsScreenshotMsg::NewLC(msgStream); 
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            SendMessage(aMsg);
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            //reset stream
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            msgStream.Close();
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            msgStream.Open(aMsg);
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            //forward stream to storage
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            iStorage.HandleDataL(msgStream.ReadInt32L(), msgStream);
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            CleanupStack::PopAndDestroy(screenshotMsg);
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            break;
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            }
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        case WindowGroupToBackgroundMessage:
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            {
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            //reset stream
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            msgStream.Close();
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            msgStream.Open(aMsg);
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            //forward stream to storage
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            iStorage.HandleDataL(msgStream.ReadInt32L(), msgStream);
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            break;
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            }
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        default: User::Leave(KErrNotSupported);
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        }
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    CleanupStack::PopAndDestroy(&msgStream);
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    }
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// -----------------------------------------------------------------------------
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//
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// -----------------------------------------------------------------------------
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//
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void CTsScreenshotProvider::OnReplace()
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    {
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    //No implementation required
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    }