mulwidgets/muldatamodel/src/mulasyncdataprovider.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 21 Jun 2010 16:15:51 +0300
branchRCL_3
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permissions -rw-r--r--
Revision: 201023 Kit: 2010125
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/*
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* Copyright (c) 2007-2008 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 "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:  Active Object Implementation for providing data asynchronously
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*
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*/
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#include "mulasyncdataprovider.h"
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#include <osn/osnnew.h>
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#include <algorithm> //for find algorithm
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#include "mullog.h"
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namespace Alf
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    {
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// ---------------------------------------------------------------------------
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// MulAsyncDataProvider
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// ---------------------------------------------------------------------------
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//
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MulAsyncDataProvider::MulAsyncDataProvider( IMulModelProvider& aDataProvider,
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                                            const MulPageDataWindow& aDataWindow )
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                     :CActive( EPriorityNormal ),
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                      mDataProvider(aDataProvider),
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                      mDataWindow(aDataWindow)
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    {
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    MUL_LOG_ENTRY_EXIT("MUL::MulAsyncDataProvider::MulAsyncDataProvider");
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    CActiveScheduler::Add(this);
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    }
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// ---------------------------------------------------------------------------
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// ~MulAsyncDataProvider
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// ---------------------------------------------------------------------------
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//
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MulAsyncDataProvider::~MulAsyncDataProvider()
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    {
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    MUL_LOG_ENTRY_EXIT("MUL::MulAsyncDataProvider::~MulAsyncDataProvider");  
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    Cancel();
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    mDataQueue.clear();
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    }
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// ---------------------------------------------------------------------------
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// RunL
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// ---------------------------------------------------------------------------
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//
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void MulAsyncDataProvider::RunL()
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    {  
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    vector<MulAsyncData>::iterator iter = mDataQueue.begin();
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    if( iter < mDataQueue.end() )
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        {
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        bool inDataWindow = false;
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        MulAsyncData asyncData = *iter;
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        if(mDataWindow.IsItemInDataWindow(asyncData.mStartIndex) /*&& mDataWindow->IsItemInDataWindow(mStartIndex+ITEMS)*/)
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            { 
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            if( asyncData.mRange < mDataWindow.WindowSize() )
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                {
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                mDataProvider.ProvideData( asyncData.mStartIndex, asyncData.mRange, asyncData.mPath); 
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                }
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            else
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                {
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                mDataProvider.ProvideData( asyncData.mStartIndex, mDataWindow.WindowSize() , asyncData.mPath); 
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                }
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            inDataWindow = true;
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            }
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        asyncData.mStartIndex += mDataWindow.WindowSize();
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        asyncData.mRange -= mDataWindow.WindowSize();
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        mDataQueue.erase(iter);
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       if( asyncData.mRange > 0 && inDataWindow )
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            {     
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            mDataQueue.insert( iter, asyncData ); 
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            if( !IsActive() )
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                {
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                ActivateAndComplete();
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                }
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            }
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         else if(mDataQueue.begin() < mDataQueue.end())
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            {  
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            if( !IsActive() )
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                {
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                ActivateAndComplete();
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                }
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            }
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        }     
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    }
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// ---------------------------------------------------------------------------
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// DoCancel
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// ---------------------------------------------------------------------------
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//
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void MulAsyncDataProvider::DoCancel()
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    {
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    //does this function required??
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    }
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//    
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// ---------------------------------------------------------------------------
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// ProvideData
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// ---------------------------------------------------------------------------
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//
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void MulAsyncDataProvider::ProvideData( int aStartIndex, int aRange, const MulDataPath& aPath, const bool aIsSync )
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    { 
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    if( aIsSync )
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        {
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   118
        mDataProvider.ProvideData( aStartIndex, aRange, aPath);
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   119
        return;
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   120
        }
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   121
    MulAsyncData asyncData;
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   122
    asyncData.mStartIndex = aStartIndex;
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   123
    asyncData.mRange = aRange;
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   124
    asyncData.mPath = aPath;
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   125
    if( std::find( mDataQueue.begin(), mDataQueue.end(), asyncData ) ==  mDataQueue.end())
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diff changeset
   126
        {
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   127
        mDataQueue.push_back( asyncData );
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diff changeset
   128
        }
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   129
                 
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   130
    for( int i = 0 ; i < mDataQueue.size() ; ++i )
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diff changeset
   131
        {
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   132
        MulAsyncData data = mDataQueue[i]; 
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   133
        if ( (mDataWindow.IsItemInDataWindow( data.mStartIndex ) &&
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   134
              !mDataWindow.IsItemInDataWindow( data.mStartIndex + data.mRange - 1 ) ) )
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parents:
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   135
            {
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   136
            int index = GetFirstIndexForWhichDataIsPresent(data.mStartIndex , data.mStartIndex + data.mRange - 1 );
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   137
            if( index!= -1 &&( index - data.mStartIndex + 1) > 0)
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parents:
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   138
                {
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   139
                mDataQueue.erase(mDataQueue.begin() + i);
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   140
                data.mRange = index - data.mStartIndex + 1;
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   141
                mDataQueue.insert(mDataQueue.begin() + i, data);
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   142
                }
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   143
            else
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parents:
diff changeset
   144
                {
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   145
                mDataQueue.erase(mDataQueue.begin() + i);
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   146
                i--;
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   147
                }    
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   148
            
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   149
            }
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   150
        else if ( (!mDataWindow.IsItemInDataWindow( data.mStartIndex ) &&
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   151
              mDataWindow.IsItemInDataWindow( data.mStartIndex + data.mRange - 1 ) ) )
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parents:
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   152
            {
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   153
            int index = GetFirstIndexForWhichDataIsPresent(data.mStartIndex , data.mStartIndex + data.mRange - 1 );
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   154
            if( index!= -1 &&( data.mStartIndex + data.mRange - index ) > 0 )
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parents:
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   155
                {
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   156
                mDataQueue.erase(mDataQueue.begin() + i);
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   157
                int endIndex = (data.mStartIndex + data.mRange - 1);
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   158
                data.mStartIndex = index;
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   159
                data.mRange = (endIndex - index + 1);
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   160
                mDataQueue.insert(mDataQueue.begin() + i, data);
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   161
                }
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parents:
diff changeset
   162
            else
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parents:
diff changeset
   163
                {
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diff changeset
   164
                mDataQueue.erase(mDataQueue.begin() + i);
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parents:
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   165
                i--;
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   166
                }
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   167
            }
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   168
        else if ( (!mDataWindow.IsItemInDataWindow( data.mStartIndex ) &&
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   169
              !mDataWindow.IsItemInDataWindow( data.mStartIndex + data.mRange - 1 ) ) )
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parents:
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   170
           {
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   171
           mDataQueue.erase(mDataQueue.begin() + i);
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   172
           i--;
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   173
           MUL_LOG_INFO2( "MUL::MulAsyncDataProvider::ProvideData Removing From Q: startIndx=%d,range=%d", data.mStartIndex, data.mRange ); 
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   174
           }
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parents:
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   175
        }
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parents:
diff changeset
   176
    
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   177
    if( !IsActive() )
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parents:
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   178
        { 
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   179
        ActivateAndComplete();
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   180
        }
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parents:
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   181
    }
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   182
// ---------------------------------------------------------------------------
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   183
// GetFirstIndexForWhichDataIsPresent
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   184
// ---------------------------------------------------------------------------
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   185
//
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   186
int MulAsyncDataProvider::GetFirstIndexForWhichDataIsPresent(int aStartIndex, int aEndIndex)
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   187
    {
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   188
    if ( aStartIndex > aEndIndex )
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parents:
diff changeset
   189
        {
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diff changeset
   190
        return -1;
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parents:
diff changeset
   191
        }
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parents:
diff changeset
   192
    int mid = (aStartIndex + aEndIndex)/2;
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parents:
diff changeset
   193
    if(mDataWindow.IsItemInDataWindow(aStartIndex))
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   194
        {
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parents:
diff changeset
   195
        if(mid == aStartIndex)
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parents:
diff changeset
   196
            {
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   197
            return mid;
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parents:
diff changeset
   198
            }
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parents:
diff changeset
   199
        if(mDataWindow.IsItemInDataWindow(mid))
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parents:
diff changeset
   200
            {
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diff changeset
   201
            return GetFirstIndexForWhichDataIsPresent(mid, aEndIndex);
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parents:
diff changeset
   202
            }
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parents:
diff changeset
   203
        else
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parents:
diff changeset
   204
            {
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   205
            return GetFirstIndexForWhichDataIsPresent(aStartIndex, mid);
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parents:
diff changeset
   206
            }
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parents:
diff changeset
   207
        }
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parents:
diff changeset
   208
     else if(mDataWindow.IsItemInDataWindow(aEndIndex))
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parents:
diff changeset
   209
        {
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   210
        if(mid == aStartIndex)
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parents:
diff changeset
   211
            {
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   212
            return (mid + 1);
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parents:
diff changeset
   213
            }
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   214
        if(mDataWindow.IsItemInDataWindow(mid))
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parents:
diff changeset
   215
            {
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parents:
diff changeset
   216
            return GetFirstIndexForWhichDataIsPresent(aStartIndex, mid);
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parents:
diff changeset
   217
            }
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   218
        else
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parents:
diff changeset
   219
            {
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   220
            return GetFirstIndexForWhichDataIsPresent(mid, aEndIndex);
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parents:
diff changeset
   221
            }           
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parents:
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   222
        }   
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parents:
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   223
    return -1;
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parents:
diff changeset
   224
    }
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parents:
diff changeset
   225
  
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parents:
diff changeset
   226
// ---------------------------------------------------------------------------
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parents:
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   227
// ActivateAndComplete
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parents:
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   228
// ---------------------------------------------------------------------------
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parents:
diff changeset
   229
//
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parents:
diff changeset
   230
 void MulAsyncDataProvider::ActivateAndComplete()
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parents:
diff changeset
   231
    {
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diff changeset
   232
    TRequestStatus* lStatus = &iStatus;
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    iStatus = KRequestPending;
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    SetActive();
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    User::RequestComplete(lStatus, KErrNone);
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    }
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    } // End of namespace Alf .
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// End of file