/*

* Copyright (c) 2008 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:  Definition for the common base class for all FsEmailUi views.

*                The class is not intended for instantation.

*

*/

// <cmail> SF

#include "emailtrace.h"

#include <alf/alfcontrolgroup.h>

#include <alf/alfvisual.h>

// </cmail>

#include <eikbtgpc.h>

#include "FreestyleEmailUiViewBase.h"

#include "FreestyleEmailUiAppui.h"

#include "FreestyleEmailUiLayoutHandler.h"

#include "FreestyleEmailUiStatusIndicator.h"

#include "FSEmail.pan"

// <cmail> Toolbar

#include <AknUtils.h>

#include <akntoolbar.h>

#include <FreestyleEmailUi.rsg>

#include <aknlayoutscalable_avkon.cdl.h>

#include <layoutmetadata.cdl.h>

// </cmail> Toolbar

// ---------------------------------------------------------------------------

//

CFsEmailUiViewBase::CFsEmailUiViewBase( CAlfControlGroup& aControlGroup,

        CFreestyleEmailUiAppUi& aAppUi )

    : iControlGroup( aControlGroup ), iAppUi( aAppUi )

    {

    FUNC_LOG;

    // Set control groups to ignore input by default

    iControlGroup.SetAcceptInput( EFalse );

    iKeyboardFlipOpen = aAppUi.IsFlipOpen();

    }

// ---------------------------------------------------------------------------

//

TUid CFsEmailUiViewBase::Id() const

    {

    FUNC_LOG;

    // This must be overriden by the inherited class

    __ASSERT_DEBUG( EFalse, Panic(EFSEmailUiBaseViewMethodNotOverriden) );

    return TUid::Null();

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::DoActivateL( const TVwsViewId& aPrevViewId,

	                                  TUid aCustomMessageId,

	                                  const TDesC8& aCustomMessage )

    {

    FUNC_LOG;

    SetViewActive( ETrue );

    StatusPane()->MakeVisible( IsStatusPaneVisible() );

    SetStatusBarLayout();

    StatusPane()->DrawNow();

    iFocusVisible = iAppUi.IsFocusShown();

    // fix view stack in case of external activation

    if ( aPrevViewId.iAppUid != KFSEmailUiUid )

        {

        iActiveMailboxBeforeExternalActivation = iAppUi.GetActiveMailboxId();

        iAppUi.ViewActivatedExternallyL( Id() );

        }

    // hide previous view

    CFsEmailUiViewBase* previousView = iAppUi.PreviousActiveView();

    TBool pluginSettingsActive = iAppUi.IsPluginSettingsViewActive();

    if ( pluginSettingsActive )

        {

        iAppUi.ReturnFromPluginSettingsView();

        }

    else if ( previousView )

        {

        // In case of external activation, hide previous control group

        // before view activation to avoid screen flickering

        if ( aPrevViewId.iAppUid != KFSEmailUiUid )

            {

            previousView->DeactivateControlGroup();

            }

        previousView->DoTransition( ETrue ); // fade out prev view

        }

    // Clear the flag of long transition effect

    SetNextTransitionOutLong( EFalse );

    // Clear status pane indicators

    CCustomStatuspaneIndicators* indicators =

        iAppUi.GetStatusPaneIndicatorContainer();

    if ( indicators )

        {

        indicators->ClearStatusPaneFlags();

        indicators->HideStatusPaneIndicators();

        }

    UpdateToolbarL();

    // Make sure Alfred display is of correct size (there is some problems with toolbar)

    iAppUi.AlfEnv().PrimaryDisplay().ForceSetVisibleArea(iAppUi.ClientRect());

    // Finally call child classes activation method

    TRAPD( error, ChildDoActivateL(aPrevViewId, aCustomMessageId, aCustomMessage) );

    if ( !error )

        {

        //view history have to be updated once again when email is sent to background when in plugin settings and composer is activated externaly

        //when composer view will be deactivated it wiil call NavigateBack;

        if (pluginSettingsActive && iAppUi.CurrentActiveView()->Id() == MailEditorId)

        	{

        	iAppUi.ReturnFromPluginSettingsView();

        	}

        // View activated succesfully

        DoTransition( EFalse );

        if ( !iAppUi.SwitchingToBackground() )

            {

            // Change visible control group

            // having here DoTransition caused grid transparency when app left from listview

            ActivateControlGroup();

            }

        else

            {

            // View activated but Mail application is switching to background.

            // Mail application was invoked from other app and now we`re going back

            // to this other app. We have to force, that after going back to Mail

            // application, ActivateControlGroup will be invoked in

            // HandleAppForegroundEventL method

            iWasActiveControlGroup = ETrue;

            }

        }

    else

        {

        // In case of error, navigate to the previous view

        DeactivateControlGroup();

        NavigateBackL();

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::UpdateToolbarL()

    {

    FUNC_LOG;

    if (AknLayoutUtils::PenEnabled())

        {

        if (HasToolbar())

            {

            const TInt resourceId(ToolbarResourceId());

            RArray<TInt> dimmedItems;

            CleanupClosePushL(dimmedItems);

            GetInitiallyDimmedItemsL(resourceId, dimmedItems);

            CAknToolbar* toolbar(CAknToolbar::NewL(resourceId));

            for (TInt i = 0; i < dimmedItems.Count(); i++)

                {

                toolbar->SetItemDimmed(dimmedItems[i], ETrue, EFalse);

                }

            CleanupStack::PopAndDestroy(); // dimmedItems.Close()

            toolbar->SetToolbarObserver(this);

            TBool toolbarVisible = ( resourceId != R_FREESTYLE_EMAIL_UI_TOOLBAR_FOLDER_LIST ); 

            toolbar->SetToolbarVisibility( toolbarVisible ); 

            SetToolbar(toolbar);

            ShowToolbar();

            }

        else

            {

            HideToolbar();

            }

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::GetInitiallyDimmedItemsL(

        const TInt /*aResourceId*/, RArray<TInt>& aDimmedItems ) const

    {

    FUNC_LOG;

    aDimmedItems.Reset();

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::HideToolbar()

    {

    FUNC_LOG;

    if (AknLayoutUtils::PenEnabled())

        {

        CAknToolbar* toolbar(Toolbar());

        if (toolbar)

            {

            toolbar->MakeVisible(EFalse);

            }

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::ShowToolbar()

    {

    FUNC_LOG;

    if (AknLayoutUtils::PenEnabled())

        {

        CAknToolbar* toolbar(Toolbar());

        if (toolbar)

            {

            toolbar->MakeVisible( ETrue );

            }

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::SetToolbarItemDimmed( const TInt aCommandId, const TBool aDimmed )

    {

    FUNC_LOG;

    if (AknLayoutUtils::PenEnabled())

        {

        CAknToolbar* toolbar(Toolbar());

        if (toolbar)

            {

            toolbar->SetItemDimmed(aCommandId, aDimmed, ETrue);

            }

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::DoDeactivate()

    {

    FUNC_LOG;

    SetViewActive( EFalse );

    HideToolbar();

    // Make control group ignore input and hide it if it's not already fading out.

    DeactivateControlGroup();

    // do view specific deactivation

    ChildDoDeactivate();

    // Return to another app in case this view was activated externally

    if ( iSendToBackgroundOnDeactivation )

        {

        iSendToBackgroundOnDeactivation = EFalse;

        // Try to bring calling external app into foreground if found

        TApaTaskList taskList( iEikonEnv->WsSession() );

        TApaTask prevAppTask = taskList.FindApp( iPreviousAppUid );

        TApaTask fsEmailTask = taskList.FindApp( KFSEmailUiUid );

        if ( fsEmailTask.Exists() && iPreviousAppUid != KMessageReaderUid )

            {

            fsEmailTask.SendToBackground();

            }

        if ( prevAppTask.Exists() )

            {

            prevAppTask.BringToForeground();

            }

        iAppUi.SetSwitchingToBackground( EFalse );

        }

    }

// ---------------------------------------------------------------------------

// virtual function to hide or show CAlfVisuals ( used for activation or deactivation )

//

void CFsEmailUiViewBase::FadeOut( TBool /* aDirectionOut */ )

	{

	FUNC_LOG;

    // should be overriden ( if needed ) to use polymorphism

	// to hide or show CAlfVisuals used in views

	}

// ---------------------------------------------------------------------------

// Check if transition effects are enabled and run the effect if needed.

// if not enabled it calls FadeOut virtual methods only

//

void CFsEmailUiViewBase::DoTransition( TBool aDirectionOut )

    {

    FUNC_LOG;

    if ( iAppUi.LayoutHandler() && iAppUi.LayoutHandler()->ViewFadeEffectActive() )

        {

        DoTransitionEffect( aDirectionOut );

        }

    else

        {

    	// FadeOut method should be overridden and use by polymorphism only when needed

    	FadeOut( aDirectionOut ); // used for hide/show visuals without transition time

    	}

    }

// ---------------------------------------------------------------------------

// Inheriting Alfred views can override these functions, if they need to do

// some special tricks for transition effects

//

void CFsEmailUiViewBase::DoTransitionEffect( TBool aDirectionOut )

    {

    FUNC_LOG;

    RPointerArray<CAlfVisual> layoutArray;

    TRAP_IGNORE( GetParentLayoutsL( layoutArray ) );

    // For views that return valid parent layout(s), use the fade effect,

    // for all other views, use the showing/hiding of control groups

    for ( TInt i = 0 ; i < layoutArray.Count() ; i++ )

        {

        // Returned parent layout might be NULL, if view construction is not

        // fully completed

        if ( layoutArray[i] != NULL )

            {

            // Ensure the view is invisible before doing fade in (because views

            // are automatically visible rigt after construction)

            if ( !aDirectionOut )

                {

                FadeVisual( layoutArray[i], ETrue, ETrue );

                }

            FadeVisual( layoutArray[i], aDirectionOut );

            }

        }

    layoutArray.Close();

    }

// ---------------------------------------------------------------------------

// Inheriting Alfred views should override this and return their parent

// layout(s) in array given as parameter. Default implementation

// does nothing, so then the array is empty.

//

void CFsEmailUiViewBase::GetParentLayoutsL( RPointerArray<CAlfVisual>& /*aLayoutArray*/ ) const

    {

    FUNC_LOG;

    }

// ---------------------------------------------------------------------------

// Fade given Alfred visual

//

void CFsEmailUiViewBase::FadeVisual(

        CAlfVisual* aVisual,

        TBool aFadeDirectionOut,

        TBool aImmediate /*= EFalse*/)

    {

    FUNC_LOG;

    // Check that we are not exiting and is fade effect activated

    if ( !iAppUi.AppUiExitOngoing() )

        {

        TInt effectTime = 0;

        if ( !aImmediate && iAppUi.LayoutHandler() )

            {

            if( aFadeDirectionOut )

                {

                effectTime = iAppUi.LayoutHandler()->ViewFadeOutEffectTime();

                }

            else

                {

                effectTime = iAppUi.LayoutHandler()->ViewFadeInEffectTime();

                }

            }

        if ( aFadeDirectionOut && IsNextTransitionOutLong() )

            {

            effectTime = effectTime * 2;

            }

        // Initialize for out fading

        TAlfTimedValue timedValue( 0, effectTime );

        // Check value and initialze for in fading if set

        if ( !aFadeDirectionOut )

            {

            timedValue.SetTarget( 1, effectTime );

            }

        aVisual->SetOpacity( timedValue );

        }

    }

// ---------------------------------------------------------------------------

// Used to indicate that the next out transition effect should be long

// (some long opening view is opened next)

//

void CFsEmailUiViewBase::SetNextTransitionOutLong( TBool aLongTransitionOut )

    {

    FUNC_LOG;

    iIsNextTransitionEffectOutLong = aLongTransitionOut;

    }

// ---------------------------------------------------------------------------

//

TBool CFsEmailUiViewBase::IsNextTransitionOutLong()

    {

    FUNC_LOG;

    return iIsNextTransitionEffectOutLong;

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::ActivateControlGroup( TInt aDelay /*= 0*/ )

    {

    FUNC_LOG;

    if ( !iAppUi.AppUiExitOngoing() )

        {

        TAlfGroupCommand showCmd( ControlGroup(), EAlfOpShow, &iAppUi.Display() );

        iAppUi.AlfEnv().Send( showCmd, aDelay );

        ControlGroup().SetAcceptInput( ETrue );

        // Status indicator is "always on top" while visible

        /*if ( iAppUi.StatusIndicator() && iAppUi.StatusIndicator()->IsVisible() )

            {

            CAlfControlGroup& indicatorGroup = iAppUi.AlfEnv().ControlGroup( KStatusIndicatorDisplayGroup );

            TAlfGroupCommand indicShowCmd( indicatorGroup, EAlfOpShow, &iAppUi.Display() );

            iAppUi.AlfEnv().Send( indicShowCmd, 0 );

            indicatorGroup.SetAcceptInput( EFalse );

            }*/

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::DeactivateControlGroup( TInt aDelay /*= 0*/ )

    {

    FUNC_LOG;

    const TReal32 KDelta = 0.01; // floating point comparison tolerance

    if ( !iAppUi.AppUiExitOngoing() )

        {

        ControlGroup().SetAcceptInput( EFalse );

        // Hide the control group immediately only if it's not already faded or

        // fading out. This is to not interfere with the cross fading effect.

        RPointerArray<CAlfVisual> layoutArray;

        TRAP_IGNORE( GetParentLayoutsL( layoutArray ) );

        TInt layoutCount = layoutArray.Count();

        TInt fadingCount = 0;

        for ( TInt i = 0 ; i < layoutCount ; ++i )

            {

            CAlfVisual* layout = layoutArray[i];

            if ( layout && layout->Opacity().Target() < KDelta )

                {

                fadingCount++;

                }

            }

        layoutArray.Close();

        if ( !layoutCount || fadingCount != layoutCount )

            {

            iAppUi.AlfEnv().CancelCommands( &ControlGroup(), EAlfOpShow );

            TAlfGroupCommand hideCmd( ControlGroup(), EAlfOpHide, &iAppUi.Display() );

            iAppUi.AlfEnv().Send( hideCmd, aDelay );

            }

        }

    }

// ---------------------------------------------------------------------------

//

CAlfControlGroup& CFsEmailUiViewBase::ControlGroup()

    {

    FUNC_LOG;

    return iControlGroup;

    }

// ---------------------------------------------------------------------------

// Handles application foreground events.

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::HandleAppForegroundEventL( TBool aForeground )

    {

    FUNC_LOG;

    HandleForegroundEventL(aForeground);

    if ( aForeground )

        {

        // Activate control group in case the view was activated when

        // application was being sent to background, and the control group

        // was left inactive.

        if( iWasActiveControlGroup )

            {

            const TInt KActivationDelay = 200; // ms

            ActivateControlGroup( KActivationDelay );

            iWasActiveControlGroup = EFalse;

            }

        }

    else if ( !iWasActiveControlGroup ) // If activation of control group isn`t forced

        {

        // Mail application is switching to background.

        // Remember state of control group to restore it when Mail goes foreground.

        iWasActiveControlGroup = ControlGroup().AcceptInput();

        }

    }

// ---------------------------------------------------------------------------

//

void CFsEmailUiViewBase::HandleDynamicVariantSwitchL( TDynamicSwitchType aType )

    {

    FUNC_LOG;

// <cmail> Toolbar

    switch (aType)

        {

        case EScreenLayoutChanged:

            UpdateToolbarL();

            break;

        }

// </cmail> Toolbar

    // Inherited classes should override this to react to skin and layout changes

#ifdef __WINSCW__

    // For emulator testing: landscape mode is "flip open"

    FlipStateChangedL(  Layout_Meta_Data::IsLandscapeOrientation() );

#endif

    }