--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/idlehomescreen/xmluirendering/renderingplugins/xnnewstickerfactory/src/xnnewstickercontrol.cpp	Wed Sep 01 12:32:46 2010 +0100
@@ -0,0 +1,424 @@
+/*
+* Copyright (c) 2002-2006 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:  Text scrolling functionality.
+*
+*/
+
+
+// INCLUDE FILES
+#include "xnnewstickercontrol.h"
+#include "xnnewstickeradapter.h"
+#include "xnproperty.h"
+
+// CONSTANTS
+   
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::CXnNewstickerControl
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CXnNewstickerControl::CXnNewstickerControl( CXnNewstickerAdapter* aAdapter ) :     
+    iCurrentTitleIndex( KErrNotFound ),
+    iAdapter( aAdapter ), 
+    iScrollLooping( ETrue )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::ConstructL()
+    {
+
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CXnNewstickerControl* CXnNewstickerControl::NewL( CXnNewstickerAdapter* aAdapter )
+    {
+    CXnNewstickerControl* self = new(ELeave)CXnNewstickerControl( aAdapter );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop(); // self   
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::~CXnNewstickerControl()
+// Destructor.
+// -----------------------------------------------------------------------------
+//
+CXnNewstickerControl::~CXnNewstickerControl()
+    {
+    iTitleTexts.ResetAndDestroy();
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::SetScrollLooping()
+// 
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::SetScrollLooping( TBool aLooping )
+    {
+    iScrollLooping = aLooping;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::AppendTitleL
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::AppendTitleL( const TDesC& aTitle )
+    {
+    HBufC* title = aTitle.AllocLC();
+    iTitleTexts.AppendL( title );
+    CleanupStack::Pop( title );
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::InsertTitleL
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::InsertTitleL( const TDesC& aTitle, TInt aIndex )
+    {
+    if( aIndex >= 0 && aIndex < iTitleTexts.Count() )
+        {
+        HBufC* title = aTitle.AllocLC();
+        iTitleTexts.InsertL( title, aIndex );
+        CleanupStack::Pop( title );
+        }
+    else
+        {
+        AppendTitleL( aTitle );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::UpdateTitleL
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::UpdateTitleL( const TDesC& aTitle, TInt aIndex )
+    {
+    if( aIndex >= 0 && aIndex < iTitleTexts.Count() )
+        {
+        HBufC* oldTitle = iTitleTexts[ aIndex ];
+        iTitleTexts.Remove( aIndex );
+        
+        delete oldTitle;
+        oldTitle = NULL;
+        
+        HBufC* title = aTitle.AllocLC();
+        iTitleTexts.InsertL( title, aIndex );
+        CleanupStack::Pop( title );   
+        }
+    else
+        {
+        AppendTitleL( aTitle );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::DeleteTitle
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::DeleteTitleL( TInt aIndex )
+    {
+    TInt count = iTitleTexts.Count();
+    
+    if( aIndex >= 0 && aIndex < count )
+        {
+        // If the last item will be deleted
+        if(count == 1)
+            {
+            iAdapter->Stop();
+            iCurrentTitleIndex = KErrNotFound;
+            }
+
+        UpdateTitleL( KNullDesC, aIndex );      
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::CurrentTitleIndex
+// -----------------------------------------------------------------------------
+//
+TInt CXnNewstickerControl::CurrentTitleIndex() const
+    {
+    return iCurrentTitleIndex;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::Title
+// -----------------------------------------------------------------------------
+//
+const TDesC& CXnNewstickerControl::Title( TInt aIndex ) const
+    {
+    if( aIndex >= 0 && aIndex < iTitleTexts.Count() )
+        {
+        return *iTitleTexts[ aIndex ];
+        }
+
+    return KNullDesC;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::LastIndexWithContent
+// -----------------------------------------------------------------------------
+//
+TInt CXnNewstickerControl::LastIndexWithContent() const
+    {
+    for( TInt i(iTitleTexts.Count()-1); i>=0; --i )
+        {
+        const TDesC& title( *iTitleTexts[i] );
+        
+        if( title != KNullDesC() )
+            {
+            return i;
+            }   
+        }
+    
+    return KErrNotFound;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::ClearTitles
+// -----------------------------------------------------------------------------
+//
+void CXnNewstickerControl::ClearTitles()
+    {
+    iAdapter->Stop();
+    iCurrentTitleIndex = KErrNotFound;
+    // Don't delete just clear the contents
+    for( TInt i=0; i < iTitleTexts.Count(); i++ )
+        {
+        TRAP_IGNORE( UpdateTitleL( KNullDesC, i ) );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::TitleCount
+// -----------------------------------------------------------------------------
+//
+TInt CXnNewstickerControl::TitleCount() const
+    {
+    return iTitleTexts.Count();
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::CurrentTitle
+// (other items were commented in a header).
+// -----------------------------------------------------------------------------
+//
+const TDesC& CXnNewstickerControl::CurrentTitle() const
+    {
+    return Title( iCurrentTitleIndex );
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::GetNextTitleWithContent
+// -----------------------------------------------------------------------------
+//
+TInt CXnNewstickerControl::GetNextTitleWithContent( TInt aStartSearch, 
+    TBool aBackwards ) const
+    {
+    TInt dir = 1;
+    if( aBackwards )
+        {
+        dir = -1;
+        }
+    
+    for( TInt i = aStartSearch; i < iTitleTexts.Count() && i >= 0; i += dir )
+        {
+        const TDesC& title( *iTitleTexts[i] );
+        
+        if( title != KNullDesC() )
+            {
+            return i;
+            }
+        }
+    
+    return KErrNotFound;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::SelectTitle
+// -----------------------------------------------------------------------------
+//
+TInt CXnNewstickerControl::SelectTitle()
+    {    
+    TInt index( GetNextTitleWithContent( 0 ) );
+    
+    TInt currentIndex( iCurrentTitleIndex );
+    
+    iCurrentTitleIndex = index;
+    
+    if ( currentIndex != iCurrentTitleIndex )
+        {
+        if ( currentIndex != KErrNotFound )
+            {
+            iAdapter->ReportNewstickerEvent( 
+                XnPropertyNames::action::trigger::name::KTitleScrolled, 
+                currentIndex );        
+            }
+        
+        if ( iCurrentTitleIndex != KErrNotFound )
+            {
+            iAdapter->ReportNewstickerEvent( 
+                XnPropertyNames::action::trigger::name::KTitleToScroll, 
+                iCurrentTitleIndex );            
+            }    
+        }
+    
+    return iCurrentTitleIndex;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::SelectNextTitle
+// -----------------------------------------------------------------------------
+//
+TBool CXnNewstickerControl::SelectNextTitle()
+    {
+    TBool ret( EFalse );
+    TInt lastIndex( iTitleTexts.Count() - 1 );
+    TInt lastIndexWithContent( LastIndexWithContent() );
+    
+    TInt currentIndex( iCurrentTitleIndex );
+                                
+    if ( lastIndexWithContent == KErrNotFound )
+        {               
+        // Loop done
+        ret = ETrue;                
+        }
+    else if ( !iScrollLooping && iCurrentTitleIndex == lastIndexWithContent )
+        {
+        // Loop done
+        ret = ETrue;
+        }        
+    else
+        {
+        if ( iCurrentTitleIndex + 1 > lastIndexWithContent )
+            {
+            // At the end, get first
+            iCurrentTitleIndex = 
+                GetNextTitleWithContent( 0 );
+            }
+        else
+            {
+            // find next index with content
+            iCurrentTitleIndex =
+                    GetNextTitleWithContent( iCurrentTitleIndex + 1 );
+            }               
+        }
+            
+    if ( ret )
+        {
+        if ( iCurrentTitleIndex != KErrNotFound )
+            {
+            iAdapter->ReportNewstickerEvent( 
+                XnPropertyNames::action::trigger::name::KTitleScrolled, 
+                iCurrentTitleIndex );            
+            }    
+        }
+    else
+        {
+        if ( currentIndex != iCurrentTitleIndex && currentIndex != KErrNotFound )
+            {
+            iAdapter->ReportNewstickerEvent( 
+                XnPropertyNames::action::trigger::name::KTitleScrolled, 
+                currentIndex );        
+            }
+        
+        if ( currentIndex != iCurrentTitleIndex && iCurrentTitleIndex != KErrNotFound )
+            {
+            iAdapter->ReportNewstickerEvent( 
+                XnPropertyNames::action::trigger::name::KTitleToScroll, 
+                iCurrentTitleIndex );            
+            }    
+        }
+              
+   return ret;
+   }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::PeekNextTitle
+// -----------------------------------------------------------------------------
+//
+TPtrC CXnNewstickerControl::PeekNextTitle( TBool& aEndOfLoop ) const
+    {
+    TBool ret( EFalse );
+    TInt lastIndex( iTitleTexts.Count() - 1 );
+    TInt lastIndexWithContent = LastIndexWithContent();
+           
+    TPtrC retval( KNullDesC() );
+    
+    if ( lastIndexWithContent == KErrNotFound )
+        {               
+        // Loop done
+        ret = ETrue;                
+        }
+    else if ( !iScrollLooping && iCurrentTitleIndex == lastIndexWithContent )
+        {
+        // Loop done
+        ret = ETrue;
+        
+        retval.Set( CurrentTitle() );
+        }        
+    else
+        {
+        if ( iCurrentTitleIndex + 1 > lastIndexWithContent )
+            {
+            // At the end, get first
+            retval.Set( Title( GetNextTitleWithContent( 0 ) ) );                
+            }
+        else
+            {
+            // find next index with content
+            retval.Set( Title( GetNextTitleWithContent( iCurrentTitleIndex + 1 ) ) );                    
+            }               
+        }
+    
+    aEndOfLoop = ret;
+    
+    return retval;
+    }
+
+// -----------------------------------------------------------------------------
+// CXnNewstickerControl::IsVisibleTitles
+// -----------------------------------------------------------------------------
+//
+TBool CXnNewstickerControl::IsVisibleTitles() const
+    {
+    for( TInt i = 0; i < iTitleTexts.Count(); i++ )
+        {
+        const TDesC& title( *iTitleTexts[i] );
+        
+        if( title != KNullDesC() )
+            {
+            return ETrue;
+            }
+        }
+    
+    return EFalse;
+    }
+
+
+//  End of File