/*

* Copyright (c) 1997-2009 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:

*

*/

#include <eikcapca.h>

#include <eikcapc.h>

#include <AknLayout2ScalableDef.h>

#include <AknUtils.h>

#include <aknlayoutscalable_avkon.cdl.h>

#include <AknsUtils.h>

#include <eikedwin.h>

#include "AknPanic.h"

const TInt KVerticalSpacing=-2;  // Avkon form controls overlap by two pixels!

const TInt KVerticalSpacingSquash=0;

const TInt KAknTopMargin = 0 ;

const TInt KAknNoTopMargin = 0 ;

class CEikCapCArrayExtension : public CBase

{

public:

	TInt iCaptionWidth;

	TRect iRect;

};

TBool IsPopupField(CEikCaptionedControl* aCC)

{

	TInt ctrlType = aCC->iControlType;

	if (ctrlType == EAknCtPopupField || ctrlType == EAknCtPopupFieldText)

	{

		CAknPopupField *field = (CAknPopupField*)aCC->iControl;

		if (field->SelectionMode() != CAknPopupField::EAknPopupFieldLabelMode)

			return ETrue;

		return EFalse;

	}

	return EFalse;

}

// NOTE densePacking != iIsFormControl  (i.e. Dialogs are dense packed)

EXPORT_C CEikCapCArray::CEikCapCArray(TInt aGranularity)

	: CArrayPtrFlat<CEikCaptionedControl>(aGranularity)

	{

	__DECLARE_NAME(_S("CEikCapCArray"));

	}

EXPORT_C CEikCapCArray::~CEikCapCArray()

	{

	delete iExtension;

	ResetAndDestroy();

	}

EXPORT_C void CEikCapCArray::DeleteLine(TInt aIndex)

	{		

	// Changed the deleting order to fix TSW Error EKMA-7ES98G

	// so that now the item is removed from the array first,

	// and only after that actually deleted.

	CBase* tmp = ((*this)[aIndex]);

	Delete(aIndex);

	delete tmp;

	}

EXPORT_C void CEikCapCArray::SetDensePacking(TBool aDensePacking)

	{

	iDensePacking=aDensePacking;

	}

void CEikCapCArray::CreateExtensionL()

{

	iExtension = new(ELeave) CEikCapCArrayExtension;

}

CEikCapCArrayExtension *CEikCapCArray::ExtensionOrNull() const

{

	if (!iExtension)

		{

		TRAP_IGNORE(const_cast<CEikCapCArray*>(this)->CreateExtensionL());

		}

	return iExtension;

}

TInt CEikCapCArray::NumberOfTextLines() const

{

	CEikCaptionedControl *firstCapCC = Count() > 0 ? (*this)[0] : NULL;

	const CEikDialogPage *dialogPage = firstCapCC ? firstCapCC->DialogPage() : NULL;

    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

	if ( dialogPage )

		ret = dialogPage->FormLayout();

	TInt lines = 0;

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

		{

			TInt num_of_lines = 0;

			CEikCaptionedControl *line = (*this)[i];

			if (ret == CEikDialogPage::ESingle)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h;

					}

			else if (ret == CEikDialogPage::EDouble)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h; // one for title

					}	

		lines += num_of_lines;

	}

	return lines;

}

TInt CEikCapCArray::NumberOfTextLinesBeforeLine(TInt aLine) const

{

	CEikCaptionedControl *firstCapCC = Count() > 0 ? (*this)[0] : NULL;

	const CEikDialogPage *dialogPage = firstCapCC ? firstCapCC->DialogPage() : NULL;

    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

	if ( dialogPage )

		ret = dialogPage->FormLayout();

	TInt lines = 0;

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

		{

			TInt num_of_lines = 0;

			CEikCaptionedControl *line = (*this)[i];

			if (ret == CEikDialogPage::ESingle)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h;

					}

			else if (ret == CEikDialogPage::EDouble)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h; // one for title

					}	

		lines += num_of_lines;

	}

	return lines;

}

TInt CEikCapCArray::FindItemFromTextLine(TInt aTextLine) const

	{

	CEikCaptionedControl *firstCapCC = Count() > 0 ? (*this)[0] : NULL;

	const CEikDialogPage *dialogPage = firstCapCC ? firstCapCC->DialogPage() : NULL;

    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

	if ( dialogPage )

		ret = dialogPage->FormLayout();

	TInt lines = 0;

	TInt i = 0;

	for(i = 0; i<Count(); i++)

		{

			TInt num_of_lines = 0;

			CEikCaptionedControl *line = (*this)[i];

			if (ret == CEikDialogPage::ESingle)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h;

					}

			else if (ret == CEikDialogPage::EDouble)

					{

					//line->MinimumSize(); // ensures NumberOfLines() is valid.

					TInt h = line->NumberOfLinesForScrollBar();

					num_of_lines = h; // one for title

					}	

		lines += num_of_lines;

		if (lines > aTextLine)

			break;

	}

	return i;

	}

/**

 *  Calculate the size of all the component controls stacked vertically.

 *  For Avkon Forms the controls overlap by 2 pixels (hard coded)

 */

EXPORT_C TSize CEikCapCArray::MinimumSize()

	{

	TSize size(0,0);

	CEikCaptionedControl *firstCapCC = Count() > 0 ? (*this)[0] : NULL;

	if (firstCapCC && firstCapCC->iIsFormControl)

		{ // we're inside form

	    // Minimumsize needs to be called even though we wouldnt use the result (at least it calculates the number of lines)

		// TP HACK START (made because MinimumSize() is not good name for situations where content dimensions are desired)

		TInt height = 0;

		TInt width = 0;

		TRect parentRect = Rect();

		TSize lineSize; // absolute size, minimumSize = maximumSize = LAF size

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

			{

			TInt gap = 0; // not possible to get this from LAF. (should be 0.5u or something)

			CEikCaptionedControl *line = (*this)[i];

				TAknWindowLineLayout layout;

			const CEikDialogPage *dialogPage = firstCapCC->DialogPage();

		    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

			if ( dialogPage )

				ret = dialogPage->FormLayout();

			if (ret == CEikDialogPage::ESingle)

					{

					lineSize = line->MinimumSize(); // ensures NumberOfLines() is valid.

					}

			else if (ret == CEikDialogPage::EDouble)

					{

					lineSize = line->MinimumSize(); // ensures NumberOfLines() is valid.

					}	

			height += lineSize.iHeight + gap;

			width = lineSize.iWidth;

			}

		size = TSize(width,height);

		}

	else

		{

	TInt wholeWidth=0;

	const TInt count=Count();

	const TInt topMargin=iDensePacking ? KAknNoTopMargin : KAknTopMargin;

	const TInt bottomMargin = iDensePacking ? KAknNoTopMargin : KAknTopMargin ;

	const TInt verticalSpacing=iDensePacking ? KVerticalSpacingSquash : KVerticalSpacing;

	TInt deltaHeight=0;

	CEikCapCArrayExtension *extension = ExtensionOrNull();

	if (!extension) return TSize(30,30); // OOM

	for (TInt ii=0;ii<count;++ii)

		{

		CEikCaptionedControl* line=(*this)[ii];

		TSize thisSize=line->MinimumSize();

		TInt thisDeltaHeight=thisSize.iHeight+verticalSpacing;

		if (deltaHeight<thisDeltaHeight)

			deltaHeight=thisDeltaHeight;

		const TInt thisCaptionWidth=line->iCaptionWidth;

		if (!(line->LatentGroupLineFollows()))

			{

			size.iHeight+=deltaHeight;

			deltaHeight=0;

			}

		if (!thisCaptionWidth)

			{

			if (wholeWidth<thisSize.iWidth)

				wholeWidth=thisSize.iWidth;

			}

		else

			{

			thisSize.iWidth-=thisCaptionWidth;

			if (extension->iCaptionWidth<thisCaptionWidth)

				extension->iCaptionWidth=thisCaptionWidth;

			if (size.iWidth<thisSize.iWidth)

				size.iWidth=thisSize.iWidth;

			}

		}

	size.iWidth+=extension->iCaptionWidth;

	if (size.iWidth<wholeWidth)

		size.iWidth=wholeWidth;

	// If the total height is zero don't bother adding a top margin

	if ( size.iHeight > 0 )

		{

		size.iHeight+=( topMargin + bottomMargin ) ;

		size.iHeight+=2 ;  // (we have included one too many '-2's)

		}

	}

	return size;

	}

/**

 * Position all of the component controls in a vertical pile.

 * For Avkon Forms the controls overlap by two pixels.  (hard coded)

 */

TRect CEikCapCArray::Rect() const

{

	CEikCapCArrayExtension *ext = ExtensionOrNull();

	if (ext)

		return ext->iRect;

	else

		return TRect(0,0, 100,100); // oom

}

TBool CEikCapCArray::CalcItemIndexes(TInt &aTopItemIndex, TInt &aMiddleItemIndex, TInt &aBottomItemIndex, TSize aAreaSize)

{ // calculates last item that still fits to the area's size

	TBool switchDir = EFalse;

	TInt i;

	TInt reservedHeight = 0;

	TInt newTop = aTopItemIndex, newMiddle = 1, newBottom = aBottomItemIndex;

	const TInt count = Count();

	CEikCaptionedControl *firstCapCC = Count() > 0 ? (*this)[0] : NULL;

	TInt num = 0;

	if (newTop == -1) { newTop = Count() - newMiddle - newBottom; }

	if (newBottom == -1) { newBottom = Count() - newTop - newMiddle; }

	if (aTopItemIndex != -1)

		{

		num = count - aTopItemIndex;

		}

	if (aBottomItemIndex != -1)

		{

		num = count - aBottomItemIndex;

		}

	for (i = 0; i < num; i++)

		{

		TInt index = 0;

		if (aTopItemIndex != -1)

			{

			index = i + aTopItemIndex;

			}

		else if (aBottomItemIndex != -1)

			{

			index = count - 1 - aBottomItemIndex - i;

			}

		CEikCaptionedControl* line=(*this)[index];

		const CEikDialogPage *dialogPage = firstCapCC->DialogPage();

	    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

		if ( dialogPage )

			ret = dialogPage->FormLayout();

		TAknWindowLineLayout layout;

		if (ret == CEikDialogPage::ESingle)

			{

			TInt height = line->NumberOfLines();

			if (height < 1) height = 1;

			if (IsPopupField(line))

				{

				layout = AknLayoutScalable_Avkon::form_field_popup_pane(height-1).LayoutLine();

				}

				else

				{	

				layout = AknLayoutScalable_Avkon::form_field_data_pane(height-1).LayoutLine();

				}

			}

		else if (ret == CEikDialogPage::EDouble)

			{

			TInt height = line->NumberOfLines();

			if (height < 1) height = 1;

			if (IsPopupField(line))

				{

				layout = AknLayoutScalable_Avkon::form_field_popup_wide_pane(height-1).LayoutLine();

				}

				else

				{

				layout = AknLayoutScalable_Avkon::form_field_data_wide_pane(height-1).LayoutLine();

				}

			}	

		else

			{

			// should Panic() here 

			}

		TRect rect = TRect(TPoint(0,0), aAreaSize);

		TAknLayoutRect layoutRect;

		layoutRect.LayoutRect(rect, layout);

		TInt height2 = layoutRect.Rect().Height();

		reservedHeight += height2;

		if (reservedHeight > aAreaSize.iHeight)

			{

			break;

			}

		newMiddle = i + 1;

		if (aTopItemIndex == -1)

			{

			newTop = count - i - 1 - aBottomItemIndex;

			}

		if (aBottomItemIndex == -1)

			{

			newBottom = count - i - 1 - aTopItemIndex;

			}

		}	

	if (reservedHeight <= aAreaSize.iHeight)

		{

		// 2nd loop for case where item sizes have changed; makes sure screen is full.

		for(int i = 0; newBottom > 0 && aTopItemIndex == -1 || newTop > 0 && aBottomItemIndex == -1; i++)

			{

			switchDir = ETrue;

			TInt index = 0;

			if (aBottomItemIndex == -1)

				{

				newMiddle ++;

				newTop --;

				index = newTop;

				}

			if (aTopItemIndex == -1)

				{

				newMiddle ++;

				newBottom --;

				index = count - 1 - newBottom;

				}

			CEikCaptionedControl* line=(*this)[index];

			const CEikDialogPage *dialogPage = firstCapCC->DialogPage();

		    CEikDialogPage::TFormLayoutSelection ret = CEikDialogPage::ESingle;

			if ( dialogPage )

				ret = dialogPage->FormLayout();

			TAknWindowLineLayout layout;

			if (ret == CEikDialogPage::ESingle)

				{

				TInt height = line->NumberOfLines();

				if (height < 1) height = 1;

			if (IsPopupField(line))

				{

				layout = AknLayoutScalable_Avkon::form_field_popup_pane(height-1).LayoutLine();

				}

				else

				{	

				layout = AknLayoutScalable_Avkon::form_field_data_pane(height-1).LayoutLine();

				}

				}

			else if (ret == CEikDialogPage::EDouble)

				{

				TInt height = line->NumberOfLines();

				if (height < 1) height = 1;

			if (IsPopupField(line))

				{

				layout = AknLayoutScalable_Avkon::form_field_popup_wide_pane(height-1).LayoutLine();

				}

				else

				{

				layout = AknLayoutScalable_Avkon::form_field_data_wide_pane(height-1).LayoutLine();

				}

				}	

			else

				{

				// should Panic() here 

				}

			TRect rect = TRect(TPoint(0,0), aAreaSize);

			TAknLayoutRect layoutRect;

			layoutRect.LayoutRect(rect, layout);

			TInt height2 = layoutRect.Rect().Height();

			reservedHeight += height2;

			if (reservedHeight > aAreaSize.iHeight)

				break;

			}

		}

	aTopItemIndex = newTop;

	aMiddleItemIndex = newMiddle;

	aBottomItemIndex = newBottom;

	return switchDir;

}

EXPORT_C void CEikCapCArray::SetRect(const TRect &aRect)

{

	SetRect(aRect, 0, -1, -1);

}

/**

 * If aControl is an edwin, set its clipping rect to empty. This

 * will disable the text hiding.

 */

static void ResetHides(CEikCaptionedControl *aControl)

	{

	aControl->SetPartiallyVisible( EFalse );

	if (aControl->ControlIsAnEdwin(aControl->iControlType))

		{

		CEikEdwin *edwin = (CEikEdwin*)aControl->iControl;

		edwin->SetTextLinesRect(TRect());

		}

	}

/**

 * Sets a clipping rectangle for hiding the whole or a part of edwin's text.

 *

 * The reason for using this function is the multiline edwins. The text inside

 * an edwin can be broken to two or more lines, which must be hidden or shown 

 * independently from each other. That is why it is not enough just to move

 * the whole edwin out of the screen.

 *

 * @param aClipRect The clipping rect for edwin's text. An empty rect disables 

 *   hiding.

 *

 * @return How many subcontrols were hidden

 */

static TInt HideLines_Edwin(CEikEdwin *aEdwin, TRect aClipRect)

	{

	aEdwin->SetTextLinesRect(aClipRect);

    // Create rects of the first and last edwin lines

    TPoint edwinTl( aEdwin->Rect().iTl );

    TPoint edwinBr( aEdwin->Rect().iBr );

    TRect textFirstLine;

    aEdwin->TextLayout()->GetLineRect(edwinTl.iY, textFirstLine);

    textFirstLine.Move( edwinTl.iX, edwinTl.iY + aEdwin->Margins().iTop );

    TRect textLastLine;

    aEdwin->TextLayout()->GetLineRect(edwinBr.iY, textLastLine);

    textLastLine.Move( edwinBr.iX, edwinBr.iY - aEdwin->Margins().iTop - textLastLine.Height() );

    // Check if at least one line fits to the clipping rect

	if( aClipRect.Contains(textFirstLine.iTl) &&

	    aClipRect.iBr.iY >= textFirstLine.iBr.iY )   // The first line fits

	    return 0;

	if( aClipRect.Contains(textLastLine.iTl) &&

	    aClipRect.iBr.iY >= textLastLine.iBr.iY )   // The last line fits

	    return 0;