/*

* Copyright (c) 2002 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: 

*   This class handles setting_text_pane and setting_code_pane (the latter in 

*	the case of integers.  There is a common base class to soak up some common 

*	textual functionality.

*

*

*/

#include "akntextsettingpage.h"

#include "aknsettingpage.h"

#include "akntextcontrol.h"

#include <AknsDrawUtils.h>

#include <AknLayout2ScalableDef.h>

#include <aknlayoutscalable_avkon.cdl.h>

#include <AknsControlContext.h>

#include <AknsFrameBackgroundControlContext.h>

#include <eikedwob.h>

#include <AknTasHook.h>

class CAknTextSettingPageExtension : public CBase

								   , public MEikEdwinObserver

    {

public:

    static CAknTextSettingPageExtension* NewL(CAknTextSettingPage* aExtensionOwner )

        {

        CAknTextSettingPageExtension* extension = new (ELeave) CAknTextSettingPageExtension( aExtensionOwner );

        CleanupStack::PushL(extension);

        extension->ConstructL();

        CleanupStack::Pop(extension);

        return extension;

        }

    ~CAknTextSettingPageExtension()

        {

        iExtensionOwner = 0;

        }

    TInt PreviousCba()

        {

        return iPreviousCba;

        };

    void SetPreviousCba(TInt aCbaId)

        {

        iPreviousCba = aCbaId;

        }

	TBool PopupState()

	 	{

		return iPopupState;

		}

	virtual void HandleEdwinEventL( CEikEdwin* /*aEdwin*/, TEdwinEvent aEventType )

		{

		if( iExtensionOwner && MEikEdwinObserver::EEventChinesePopupClose == aEventType )

			{

			iPopupState = EFalse;

			iExtensionOwner->ProcessPopupStateChangesL();

			}

	     else if(iExtensionOwner && MEikEdwinObserver::EEventChinesePopupOpen == aEventType)

	     	{

	     	iPopupState = ETrue;

	     	}			

		}

private:

    void ConstructL()

        {

        }

    CAknTextSettingPageExtension(CAknTextSettingPage*  aExtensionOwner )

        : iPreviousCba( 0 ), iExtensionOwner( aExtensionOwner )

        , iPopupState( EFalse )

        {

        }

private:

    TInt iPreviousCba;

    CAknTextSettingPage* iExtensionOwner;

    TBool iPopupState;  // when open the popup set popup state flag  to 1

    };

/**

 * Exported in case others want to derive from this class

 *

 */

EXPORT_C CAknEdwinSettingPage::CAknEdwinSettingPage( TInt aResourceId ) 

	: CAknSettingPage(aResourceId)

	{

	AKNTASHOOK_ADD( this, "CAknEdwinSettingPage" );

	}

EXPORT_C CAknEdwinSettingPage::CAknEdwinSettingPage(	

								const TDesC* aSettingText, 

								TInt aSettingNumber, 

								TInt aControlType,

								TInt aEditorResourceId, 

								TInt aSettingPageResourceId ) 

								:	CAknSettingPage( 

									aSettingText, 

									aSettingNumber, 

									aControlType, 

									aEditorResourceId, 

									aSettingPageResourceId )

	{

	AKNTASHOOK_ADD( this, "CAknEdwinSettingPage" );

	}

/**

 * All setting pages containing edwins will have the same draw code

 *

 */

EXPORT_C void CAknEdwinSettingPage::Draw(const TRect& aRect) const

	{

	BaseDraw( aRect );

	}

/** 

 *

 * Type-specific access to the text editor control

 *

 */

EXPORT_C CEikEdwin* CAknEdwinSettingPage::TextControl()

	{

	return STATIC_CAST( CEikEdwin*, EditorControl());

	}

EXPORT_C void CAknEdwinSettingPage::HandlePointerEventL(const TPointerEvent& aPointerEvent) 

    { 

    CAknSettingPage::HandlePointerEventL(aPointerEvent); 

    }	

EXPORT_C void* CAknEdwinSettingPage::ExtensionInterface( TUid /*aInterface*/ ) 

    { 

    return NULL;

    }

/**

* CAknEdwinSettingPage reserved methods

*/

EXPORT_C void CAknEdwinSettingPage::CAknEdwinSettingPage_Reserved_1()

	{

	}

///////////////////////////////////////////////////////////////////////

//

// CAknTextSettingPage

//

///////////////////////////////////////////////////////////////////////

/**

 *

 * Constructor from setting page resource id + referenced text + flags

 *

 */

EXPORT_C CAknTextSettingPage::CAknTextSettingPage( TInt aResourceId, TDes& aText, TInt aFlags ):

	 CAknEdwinSettingPage(aResourceId),iText(aText), iTextSettingPageFlags( aFlags )

	{

	AKNTASHOOK_ADD( this, "CAknTextSettingPage" );

	}

EXPORT_C CAknTextSettingPage::CAknTextSettingPage(	

								const TDesC* aSettingText, 

								TInt aSettingNumber, 

								TInt aControlType,

								TInt aEditorResourceId, 

								TInt aSettingPageResourceId, 

								TDes& aText, 

								TInt aTextSettingPageFlags)

								:	CAknEdwinSettingPage( 

									aSettingText, 

									aSettingNumber, 

									aControlType, 

									aEditorResourceId, 

									aSettingPageResourceId ), 

									iText( aText ),  

									iTextSettingPageFlags( aTextSettingPageFlags )

	{

	AKNTASHOOK_ADD( this, "CAknTextSettingPage" );

	}

/**

 * Destructor

 *

 */

EXPORT_C CAknTextSettingPage::~CAknTextSettingPage()

	{

	if( TextControl( ) )

		{	

	    TextControl( )->RemoveEdwinObserver( iExtension );

		}

	AKNTASHOOK_REMOVE();

	delete iBackupText;

    delete iExtension;

	}

/** 

 *

 * The 2nd stage construction. Stored internal resource is used to perform the

 * construction.

 *

 */

EXPORT_C void CAknTextSettingPage::ConstructL()

	{

	BaseConstructL();

	iBackupText = iText.AllocL();

	CEikEdwin* editor = TextControl();

	// Inhibit predictive text entry unless allowed by API

	if ( !(iTextSettingPageFlags & EPredictiveTextEntryPermitted) )

		editor->SetAknEditorFlags( EAknEditorFlagNoT9 | editor->AknEdwinFlags() );

	if(!IsEditable())

	    {

	    editor->SetReadOnly(ETrue);

	    editor->SetAknEditorFlags( CEikEdwin::EDisplayOnly | editor->AknEdwinFlags() );

	    }

	// Determine the maximum size of the text.

	// First get the maximum extent that may have been set by resource

	TInt maxLen = editor->MaxLength();

	// Get maximum length from the iText

	TInt desMaxLen = iText.MaxLength();

	// Use the minimum value of the two

	if ( maxLen == 0 ) // Not set in resource

		{

		editor->SetMaxLength( desMaxLen );

		}

	else

		{

		editor->SetMaxLength( Min( maxLen, desMaxLen ) );

		}

	// Note that this will set the text to be the length in the passed descriptor, despite the maxlength 

	// set above; subsequent editing will ensure that the editor can only decrease in size.

	editor->SetTextL( &iText );

	iExtension = CAknTextSettingPageExtension::NewL(this);

	editor->AddEdwinObserverL( iExtension );

	// Initialize the validity and CBAs

	CheckAndSetDataValidity();

	UpdateCbaL();

	// Construct an appropriate control context for the contained editor areas.

	// Context produced is owned by CAknSettingPage. 

    SetEditedItemFrameIID( KAknsIIDQsnFrInput, KAknsIIDQsnFrInputCenter );

	TextControl()->ScrollBarFrame()->VerticalScrollBar()->SetMopParent(this);

	}

/**

 * Acts upon changes in the hosted control's state. 

 *

 * @param	aControl	The control changing its state (not used)

 * @param	aEventType	The type of control event 

 */

EXPORT_C void CAknTextSettingPage::HandleControlEventL(CCoeControl* /*aControl*/,

				 MCoeControlObserver::TCoeEvent aEventType)

	{

	// This event is used as it is called at least every time an edit is made to 

	// the edwin.

	if ( aEventType == EEventStateChanged )

		{

		if ( iUpdateMode == EUpdateWhenChanged)

			UpdateSettingL();

		// This updates the CBA depending on text length

		CheckAndSetDataValidity();

		UpdateCbaL();

		}

	}

/**

 *

 * This routine is called before the editor when the editor is first displayed.  This routine

 * puts in altered softkey bindings if there is zero-length text.

 *

 */

EXPORT_C void CAknTextSettingPage::DynamicInitL()

	{

	UpdateCbaL();

	}

/**

 *

 * This routine is called when the a change is detected in the editor.

 * The text is copied out to the referenced descriptor using a utility routine.

 *

 */

EXPORT_C void CAknTextSettingPage::UpdateSettingL()

	{

	UpdateTextL();

	if( iSettingPageObserver )

		iSettingPageObserver->HandleSettingPageEventL(this, MAknSettingPageObserver::EEventSettingChanged);	

	}

/**

 * Soak up function to do the safe copying of the editor to the referenced value

 *

 */

EXPORT_C void CAknTextSettingPage::UpdateTextL()

	{

	CEikEdwin* edwin = TextControl();

	edwin->CheckValidityOfChars(0, edwin->TextLength());

	HBufC* heapText = edwin->GetTextInHBufL();

	// GetTextInHBufL returns a null pointer if the text length is zero!

	if ( heapText )

		{

		iText.Copy(heapText->Left( iText.MaxLength() ) );

		delete heapText;

		}

	else

		{

		iText.SetLength( 0 );

		}

	}

/**

 *

 * The value is copied out and the call back called if there is an observer

 *

 */

EXPORT_C void CAknTextSettingPage::AcceptSettingL()

	{

	UpdateTextL();

	}

/** 

 * 

 * If the setting page is cancelled, this is called to restore the backed up copy of the 

 * input text

 *

 */

EXPORT_C void CAknTextSettingPage::RestoreOriginalSettingL()

	{

	iText.Copy( *iBackupText );

	}

void CAknTextSettingPage::ProcessPopupStateChangesL()

	{

	UpdateCbaL();

	}

EXPORT_C void CAknTextSettingPage::UpdateCbaL()

	{

	if ( IsStopActiveSchudlerCalled() )

	    {

	    CAknSettingPage::UpdateCbaL();

	    return;

	    }

	// Modify the CBA labels if the text goes to zero length or becomes non-zero

    TInt cbaId = 0;    

	if ( !DataValidity() || !IsEditable() )

	    {

	    cbaId = InvalidDataCbaResourceId();	    

	    }		

	else

	    {

	    cbaId = DefaultCbaResourceId(); 

	    }

    if( (iExtension->PreviousCba() != cbaId) && ( !iExtension->PopupState() ) )

	    {

	    Cba()->SetCommandSetL( cbaId );

	    Cba()->DrawDeferred();

	    iExtension->SetPreviousCba( cbaId );

	    }	

	}

EXPORT_C void CAknTextSettingPage::SizeChanged()

	{

	StandardSettingPageLayout();  // Must be part of any re-implementation

	TAknLayoutRect layoutRect;

	layoutRect.LayoutRect(

	    SettingItemContentRect( ETrue ),

        AknLayoutScalable_Avkon::setting_text_pane_copy1( 0 ) );

	TRect parentRect( layoutRect.Rect() );

	layoutRect.LayoutRect(

	   parentRect,

	   AknLayoutScalable_Avkon::input_focus_pane_cp1_copy1() );

	TRect edwinFrameRect( layoutRect.Rect() );

	layoutRect.LayoutRect(

	    parentRect,

	    AknLayoutScalable_Avkon::indicator_popup_pane_cp5() );

	TRect indicatorRect( layoutRect.Rect() );

	iEdwinLayoutRect.LayoutRect(

	    parentRect,

	    AknLayoutScalable_Avkon::list_set_text_pane_copy1( 0 ) );

	TRect edwinRect( iEdwinLayoutRect.Rect() );

    TAknLayoutScalableParameterLimits textLimits(

        AknLayoutScalable_Avkon::set_text_pane_t1_copy1_ParamLimits() );

    TAknTextComponentLayout layout;

    RArray<TAknTextComponentLayout> array;

    for ( TInt i = textLimits.FirstRow(); i <= textLimits.LastRow(); ++i )

        {

        array.Append(

            AknLayoutScalable_Avkon::set_text_pane_t1_copy1( 0, 0, i ) );

        }

    AknLayoutUtils::LayoutEdwin( TextControl(),

                                 edwinRect,

                                 layout.Multiline( array ),

                                 EAknsCIQsnTextColorsCG26 );

    array.Close();

    layoutRect.LayoutRect(

        edwinFrameRect,

        AknLayoutScalable_Avkon::set_opt_bg_pane_g1_copy1() );

    SetEditedItemFrameRects( edwinFrameRect, layoutRect.Rect() );

    SetEditorIndicatorRect( indicatorRect );

    if ( !TextControl()->ScrollBarFrame() )

        {

        TRAP_IGNORE(

            {

            TextControl()->CreateScrollBarFrameL();

            TextControl()->ScrollBarFrame()->SetScrollBarVisibilityL( 

                CEikScrollBarFrame::EOff,CEikScrollBarFrame::EOn );

            });

        }

    if ( TextControl()->ScrollBarFrame() )

        {

        layoutRect.LayoutRect(

            Rect(), 

            TAknWindowComponentLayout::Compose(

                AknLayoutScalable_Avkon::settings_container_pane( 0 ),

                AknLayoutScalable_Avkon::listscroll_set_pane_copy1( 0 ) ) );

        AknLayoutUtils::LayoutVerticalScrollBar(

            TextControl()->ScrollBarFrame(), 

            layoutRect.Rect(),

            AknLayoutScalable_Avkon::scroll_pane_cp121_copy1( 0 ) );       

        }

	}

/**

* Validity is alway ETrue unless the flag asking for some non-whitespace data is set.

* If set, and if there is an edwin, then check to see that there is a valid character 

* somewhere in the text

*/

EXPORT_C void CAknTextSettingPage::CheckAndSetDataValidity()

	{

    TBool validity(ETrue);

	if ( ! (iTextSettingPageFlags & EZeroLengthAllowed ) )

		{

		CEikEdwin* edwin =  TextControl();

		if ( edwin )

			{

			// Use access to Text() to get at text without allocating anything

			TPtrC text = edwin->Text()->Read(0);

            // we shold not have only spaces in the text    

			validity &= AknTextUtils::IsEmptyText( text );

			_LIT( KEnterSymbol, "\x21b2\x2029" );

			if ( text.Compare( KEnterSymbol ) == 0 )

			    {

			    validity = EFalse;

			    }

			// check that enter char does not come here

			TInt flags = edwin->UserFlags();

			TInt flags2 = edwin->AknEdwinFlags();

			// check that all chars are valid

			for(TInt n=0;validity && n<text.Length();n++)

			    {

			    TChar ch = text[n];

			    //validity &= ch.IsAlpha();

			    }

			}

		else

			{

			validity = EFalse;			

			}

		}

	SetDataValidity( validity );

	}

/**

 * Writes the internal state of the control and its components to aStream.

 * Does nothing in release mode.

 * Designed to be overidden and base called by subclasses.

 */

#ifndef _DEBUG

EXPORT_C void CAknTextSettingPage::WriteInternalStateL(RWriteStream& /*aWriteStream*/) const

	{}

#else

EXPORT_C void CAknTextSettingPage::WriteInternalStateL(RWriteStream& aWriteStream) const

	{

	CAknSettingPage::WriteInternalStateL(aWriteStream);

	}

#endif