--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extras/about/src/AboutResourceLoader.cpp	Tue Sep 14 21:21:28 2010 +0300
@@ -0,0 +1,320 @@
+/*
+* Copyright (c) 2010 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: Resource loader for About in order to asynchronous load resource.
+*
+*/
+
+#include "AboutResourceLoader.h"
+#include "MResourceLoaderObserver.h"    // For MResourceLoaderObserver
+#include "AboutResource.h"              // For CAboutResource
+#include <StringLoader.h>               // For StringLoader
+#include <coneresloader.h>              // For RConeResourceLoader
+#include <eikenv.h>                     // For CEikonEnv
+#include <StringLoader.h>               // For StringLoader
+#include <f32file.h>
+#include <BAUTILS.H>
+
+// CONSTANTS
+const TInt KDefaultResourceId( -1 ); // Default resource id.
+// The count for the resouce that to be loaded in one time.
+const TInt KDefaultItemLoadingCount( 10 );
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::CAboutResourceLoader()
+//
+// ---------------------------------------------------------
+CAboutResourceLoader::CAboutResourceLoader( CEikonEnv* aEikonEnv,
+                                    MResourceLoaderObserver* aObserver ) 
+                     : CActive( EPriorityLow ),
+                       iEnv( aEikonEnv ),
+                       iResourceId( KDefaultResourceId ),
+                       iObserver( aObserver )
+    {
+    
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::NewLC()
+//
+// ---------------------------------------------------------
+CAboutResourceLoader* CAboutResourceLoader::NewLC( CEikonEnv* aEikonEnv, 
+                                        MResourceLoaderObserver* aObserver )
+    {
+    CAboutResourceLoader* self = new ( ELeave ) CAboutResourceLoader( 
+                                                    aEikonEnv, aObserver );
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    return self;
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::NewL()
+//
+// ---------------------------------------------------------
+CAboutResourceLoader* CAboutResourceLoader::NewL( CEikonEnv* aEikonEnv, 
+                                        MResourceLoaderObserver* aObserver )
+    {
+    CAboutResourceLoader* self = CAboutResourceLoader::NewLC( 
+                                            aEikonEnv, aObserver );
+    CleanupStack::Pop(); // self;
+    return self;
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::ConstructL()
+//
+// ---------------------------------------------------------
+void CAboutResourceLoader::ConstructL()
+    {
+    CActiveScheduler::Add(this); // Add to scheduler
+    iLoadedItem = new(ELeave) RPointerArray<CAboutResource>();
+    iLoader = new(ELeave) RConeResourceLoader( *iEnv );
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::CAboutResourceLoader()
+// 
+// ---------------------------------------------------------
+CAboutResourceLoader::~CAboutResourceLoader()
+    {
+    Cancel(); // Cancel any request, if outstanding
+    if ( iLoadedItem )
+        {
+        iLoadedItem->ResetAndDestroy();
+        delete iLoadedItem;
+        iLoadedItem = NULL;
+        }
+    if ( iResourceBuffer )
+        {
+        delete iResourceBuffer;
+        iResourceBuffer = NULL;
+        }
+    if ( iLoader )
+        {
+        iLoader->Close();
+        delete iLoader;
+        iLoader = NULL;
+        }
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::DoCancel()
+// 
+// ---------------------------------------------------------
+void CAboutResourceLoader::DoCancel()
+    {
+    iItemIterator = 0;
+    // Delete the resource buffer.
+    if ( iResourceBuffer )
+        {
+        delete iResourceBuffer;
+        iResourceBuffer = NULL;
+        }
+    
+    if ( iLoader )
+        {
+        iLoader->Close();
+        }
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::StartL()
+// 
+// ---------------------------------------------------------
+void CAboutResourceLoader::StartL()
+    {
+    // Leave with KErrGeneral if the resource id is not set.
+    if ( iResourceId == KDefaultResourceId )
+        {
+        User::Leave( KErrGeneral );
+        }
+    
+    Cancel();
+    
+    iItemIterator = 0;
+    ReleaseLoadedItems();
+    
+    if ( !iLoaded )
+        {
+        // Init the rsc file path
+        TFileName filePath( iResourcePath );
+        BaflUtils::NearestLanguageFile( iEnv->FsSession(), filePath );
+        iLoader->Close();
+        iLoader->OpenL( filePath );
+        }
+    
+    if ( iResourceBuffer )
+        {
+        delete iResourceBuffer;
+        iResourceBuffer = NULL;
+        }
+    
+    iResourceBuffer = iEnv->AllocReadResourceAsDes8LC( iResourceId );
+    iReader.SetBuffer( iResourceBuffer );
+    iItemCount = iReader.ReadInt16();
+    CleanupStack::Pop(); // iResourceBuffer
+    
+    Activate();
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::RunL()
+// 
+// ---------------------------------------------------------
+void CAboutResourceLoader::RunL()
+    {
+    TInt err = KErrNone;
+    for ( ; iItemIterator < iItemCount; iItemIterator++ )
+        {
+        CAboutResource* aboutResource = CAboutResource::NewL();
+        CleanupStack::PushL( aboutResource );
+        TInt type = iReader.ReadInt8();
+        
+        // Load Text
+        if ( type == EAboutTextItem )
+            {
+            HBufC* resourceItem( NULL );
+            // There are two different text, one is direct output and another needs format
+            if ( iReader.ReadInt8() == EAboutUpdateTime )
+                {
+                // About text needs format
+                TTime time;
+                time.UniversalTime();
+                TDateTime currentTime = time.DateTime();
+                resourceItem = StringLoader::LoadLC( iReader.ReadInt32(), 
+                                            currentTime.Year(), CEikonEnv::Static() );
+                }
+            else
+                {
+                // Direct output about text
+                resourceItem = iEnv->AllocReadResourceLC( iReader.ReadInt32() );
+                }
+            // Set the loaded item
+            aboutResource->SetResourceItem( resourceItem );
+            // Set the loaded item
+            aboutResource->SetResourceIndex( iItemIterator );
+            iLoadedItem->AppendL( aboutResource );
+            CleanupStack::Pop( 2 ); // resourceItem and aboutResource
+            }
+        // Load image.
+        else if ( type == EAboutImageItem )
+            {
+            TPtrC imageFile = iReader.ReadTPtrC();
+            aboutResource->SetResourceItem( imageFile.AllocL() );
+            aboutResource->SetBitmapId( iReader.ReadInt16() );
+            aboutResource->SetResourceType( EAboutImageItem );
+            iLoadedItem->AppendL( aboutResource );
+            CleanupStack::Pop(); // aboutResource
+            }
+        else
+            {
+            err = KErrNotSupported;
+            CleanupStack::PopAndDestroy(); // aboutResource
+            break;
+            }
+        
+        // Ten items per loading and calculate the number of loaded
+        if ( ( iItemIterator % KDefaultItemLoadingCount ) 
+                            == ( KDefaultItemLoadingCount - 1 ) )
+            {
+            // Once the value of iItemIterator > 10, we should break
+            iItemIterator++;
+            break;
+            }
+        }
+    
+    // Notify observer.
+    if ( err == KErrNone && iItemIterator < iItemCount )
+        {
+        // Ten items loading over, Notify HandleItemsLoadedL observer
+        iObserver->HandleItemsLoadedL( err );
+        Activate();
+        }
+    else
+        {
+        // Once there is not enough ten items, need run this function again
+        iObserver->HandleItemsLoadedL( err );
+        // One resource loading over, Notify HandleResourceLoadCompletedL observer
+        iObserver->HandleResourceLoadCompletedL( iResourceId, err );
+        }
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::RunError()
+//
+// ---------------------------------------------------------
+TInt CAboutResourceLoader::RunError( TInt aError )
+    {
+    return aError;
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::Activate()
+//
+// ---------------------------------------------------------
+void CAboutResourceLoader::Activate()
+    {
+    TRequestStatus* status = &iStatus;
+    *status = KRequestPending;
+    User::RequestComplete( status, KErrNone );
+    SetActive();
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::SetResourceId()
+//
+// ---------------------------------------------------------
+void CAboutResourceLoader::SetResourceId( const TInt aResourceId, 
+                        const TBool aLoaded, const TDesC& aResourcePath )
+    {
+    iResourceId = aResourceId;
+    iLoaded = aLoaded;
+    iResourcePath.Copy( aResourcePath );
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::CurrentResourceId()
+//
+// ---------------------------------------------------------
+TInt CAboutResourceLoader::CurrentResourceId()
+    {
+    return iResourceId;
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::LoadedResourceItems()
+//
+// ---------------------------------------------------------
+RPointerArray<CAboutResource>* CAboutResourceLoader::LoadedResourceItems() const
+    {
+    return iLoadedItem;
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::RleaseLoadedItems()
+//
+// ---------------------------------------------------------
+void CAboutResourceLoader::ReleaseLoadedItems()
+    {
+    iLoadedItem->ResetAndDestroy();
+    }
+
+// ---------------------------------------------------------
+// CAboutResourceLoader::ItemCount()
+//
+// ---------------------------------------------------------
+TInt CAboutResourceLoader::ItemCount() const
+    {
+    return iItemCount;
+    }