/*

* Copyright (c) 1996-2009 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 "FRMPRINT.H"

#include "FRMCONST.H"

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include "FRMCONST_INTERNAL.H"

#include "FRMCONST_PARTNER.H"

#endif

/** Page region printer interface.

 @publishedAll

 @return CTextPageRegionPrinter returned

 @param aLayDoc Information needed by the text layout engine to lay out a text object.

 @param aPrinterDevice Physical graphics device.

 @post CTextPageRegionPrinter object is now fully initialised

 */

EXPORT_C CTextPageRegionPrinter* CTextPageRegionPrinter::NewL(MLayDoc* aLayDoc,CPrinterDevice* aPrinterDevice)

	{

	CTextPageRegionPrinter* self=new(ELeave) CTextPageRegionPrinter(); 

	CleanupStack::PushL(self);

	self->ConstructL(aLayDoc,aPrinterDevice);

	CleanupStack::Pop();

	return self;

	}

EXPORT_C CTextPageRegionPrinter::~CTextPageRegionPrinter()

	{

	delete iLayout;

	delete iGc;

	delete iPictureGc;

	}

/**

 Sets the page list.

 @publishedAll

 @param aPageList Page list.

 */

EXPORT_C void CTextPageRegionPrinter::SetPageList(const CArrayFix<TInt>* aPageList)

	{

	iPageList=aPageList;

	}

/**

 Sets the printer device.

 @publishedAll

 @param aPrinterDevice Physical graphics device.

 */

 EXPORT_C void CTextPageRegionPrinter::SetPrinterDevice(CPrinterDevice* aPrinterDevice)

	{

	iPrinterDevice=aPrinterDevice;

	iImageDevice=aPrinterDevice;

	iCurrentPage=KMinTInt32;	 // To force a call to SetPageL when PrintBandL first called.

	iPageSizeInTwips=aPrinterDevice->CurrentPageSpecInTwips().OrientedPageSize();

	}

/**

 Sets the layout document.

 @publishedAll

 @param aDoc Layout document.

 */

EXPORT_C void CTextPageRegionPrinter::SetDocument(MLayDoc *aDoc)

	{

	iCurrentPage=KMinTInt32;	 // To force a call to SetPageL when PrintBandL first called.

	iLayout->SetLayDoc(aDoc);

	}

/**

 Sets the print preview.

 @publishedAll

 @param aPrintPreview.

 */

EXPORT_C void CTextPageRegionPrinter::SetPrintPreview(TBool aPrintPreview)

	{

	iPrintPreview=aPrintPreview;

	iCurrentPage=KMinTInt32;	 // To force a call to SetPageL when PrintBandL first called.

	}

/**

 Sets the Page Spec In Twips.

 @publishedAll

 @param aPageSpec.

 */

EXPORT_C void CTextPageRegionPrinter::SetPageSpecInTwips(const TPageSpec& aPageSpec)

	{

	iPageSizeInTwips=aPageSpec.OrientedPageSize();

	}

/**

 Sets the page margin in twips.

 @publishedAll

 @param aPageMargins.

 */

EXPORT_C void CTextPageRegionPrinter::SetPageMarginsInTwips(const TMargins& aPageMargins)

	{

	iPageMarginsInTwips=aPageMargins;

	}

/**

 Sets the text margin widths in twips.

 @publishedAll

 @param aLabelMarginWidth

 @param aGutterMarginWidth

 */

EXPORT_C void CTextPageRegionPrinter::SetTextMarginWidthsInTwips(TInt aLabelMarginWidth,TInt aGutterMarginWidth) 

	{

	iLabelMarginWidthInTwips=aLabelMarginWidth;

	iGutterMarginWidthInTwips=aGutterMarginWidth;

	}

/**

 Set the number given to the first page of the document that has been paginated.

 Typically 1, but might be different (eg for document containing second chapter of book).

 @publishedAll

 @param aFirstPage

 */

EXPORT_C void CTextPageRegionPrinter::SetFirstPageOfDoc(TInt aFirstPage)

	{

	iFirstPage=aFirstPage;

	}

/**

 Set the number given to the first page of the document that has been paginated.

 Typically 1, but might be different (eg for document containing second chapter of book).

 @publishedAll

 @param aImageDevice

 @param aPageNo

 @param aBandInPixels

 */

EXPORT_C void CTextPageRegionPrinter::PrintBandL(CGraphicsDevice* aImageDevice,TInt aPageNo,const TBandAttributes& aBandInPixels)

//

// Traps leaves

//

	{

	__ASSERT_ALWAYS(iPageList!=NULL,FormPanic(EFInvalidPageList));

	__ASSERT_DEBUG(aPageNo-iFirstPage<iPageList->Count(),FormPanic(EFInvalidPageNumber));

	__ASSERT_DEBUG(aPageNo>=iFirstPage,FormPanic(EFInvalidPageNumber));

	TRAPD(err,PrintBand2L(aImageDevice,aPageNo,aBandInPixels));

	if (err)

		LeaveL(err);

	}

/**

 Sets the fill to either the text box or whole view rect occupied by paragraph.

 @publishedAll

 @deprecated 7.0 

 @param aFillTextOnly

 */

EXPORT_C void CTextPageRegionPrinter::SetParagraphFillTextOnly(TBool aFillTextOnly)

	{

	iDrawTextLayoutContext.SetParagraphFillTextOnly(aFillTextOnly);

	}

/**

 Takes the specified band and draws to specified Gc those lines that intersect the band on the page.

 @param aImageDevice The specified Graphics device.

 @param aPageNo The page number.

 @param aBandInPixels The specified band in pixels.

 */

void CTextPageRegionPrinter::PrintBand2L(CGraphicsDevice* aImageDevice,TInt aPageNo

															,const TBandAttributes& aBandInPixels)

	{

	iImageDevice=aImageDevice;

	if (aBandInPixels.iFirstBandOnPage || aPageNo!=iCurrentPage)

		SetPageL(aPageNo);

	if (!iGc)

		{

		User::LeaveIfError(iImageDevice->CreateContext((CGraphicsContext *&) iGc));

		if (!aBandInPixels.iGraphicsIsIgnored)

			User::LeaveIfError(iImageDevice->CreateContext((CGraphicsContext *&) iPictureGc));

		iDrawTextLayoutContext.SetGc(iGc,iPictureGc);

		}

	iDrawTextLayoutContext.SetDrawTextAndGraphics();

	if (aBandInPixels.iTextIsIgnored && aBandInPixels.iGraphicsIsIgnored)

		return;

	else if (aBandInPixels.iTextIsIgnored)

		iDrawTextLayoutContext.SetDrawGraphicsOnly();

	else if (aBandInPixels.iGraphicsIsIgnored)

		iDrawTextLayoutContext.SetDrawTextOnly();

	iLayout->DrawL(aBandInPixels.iRect,&iDrawTextLayoutContext);

	iDrawTextLayoutContext.SetDrawTextAndGraphics();

	delete iGc;

	iGc=NULL;

	delete iPictureGc;

	iPictureGc=NULL;

	}

 CTextPageRegionPrinter::CTextPageRegionPrinter()

	{

	iDrawTextLayoutContext.SetDrawToEveryPixel(EFalse);

	iDrawTextLayoutContext.SetClipping(EFalse);

	}

/**

 Constructs a CTextPageRegionPrinter.

 Defaults are that no label margin nor gutter margin and that text is formatted and displayed

 to the printable page.

 @param aLayDoc

 @param aPrinterDevice The printer device.

 */

 void CTextPageRegionPrinter::ConstructL(MLayDoc* aLayDoc,CPrinterDevice* aPrinterDevice)

	{

	iPrintPreview=EFalse;

	iPageSizeInTwips=aPrinterDevice->CurrentPageSpecInTwips().OrientedPageSize();

	iPrinterDevice=aPrinterDevice;

	iImageDevice=aPrinterDevice;

	iCurrentPage=KMinTInt32;	 // To force a call to SetPageL when PrintBandL first called.

	TInt textWidth=aPrinterDevice->HorizontalTwipsToPixels(LayoutWidthInTwips());

	iLayout=CTextLayout::NewL(aLayDoc,textWidth);

	iLayout->SetAmountToFormat(CTextLayout::EFFormatBand);

	SetFirstPageOfDoc(1);

	}

/**

 Set the format and Image devices.

 All these calls must pass values in twips to textlayout and image pixels to textdraw

 */

void CTextPageRegionPrinter::SetFormatAndImageDevices()

	{

	iDrawTextLayoutContext.iViewRect=iImageDevice->TwipsToPixels(ViewRectInTwips());

	iDrawTextLayoutContext.iGutterMarginWidth=iImageDevice->HorizontalTwipsToPixels(iGutterMarginWidthInTwips);

	iDrawTextLayoutContext.iLabelMarginWidth=LabelMarginWidthInPixels();

	iDrawTextLayoutContext.iTextStartX=TextStartXInPixels();

	// iLayout - everything in twips

	iLayout->SetBandHeight(ViewRectInTwips().Height());

	iLayout->SetImageDeviceMap(iImageDevice);

	iLayout->SetLabelsMarginWidth(LabelMarginWidthInPixels());

	if (iPrintPreview)

		iLayout->SetFormatMode(CLayoutData::EFPrintPreviewMode,LayoutWidthInTwips(),iPrinterDevice);

	else

		iLayout->SetFormatMode(CLayoutData::EFPrintMode,LayoutWidthInTwips(),iPrinterDevice);

	}

/**

 Gets the view rect in twips.

 @return Returns the view rect in pixels

 */

TRect CTextPageRegionPrinter::ViewRectInTwips() const

	{

	TRect viewRect;

	if (iLabelMarginWidthInTwips==0)

		viewRect.iTl.iX=0;

	else

		viewRect.iTl.iX=iPageMarginsInTwips.iLeft;

	viewRect.iTl.iY=iPageMarginsInTwips.iTop;

	viewRect.iBr.iX=iPageSizeInTwips.iWidth;

	viewRect.iBr.iY=iPageSizeInTwips.iHeight-iPageMarginsInTwips.iBottom;

	return viewRect;

	}

/**

 Returns the width of page, excluding margins.

 @return Returns the width of page, excluding margins

 */

TInt CTextPageRegionPrinter::LayoutWidthInTwips() const

	{

	TInt width=iPageSizeInTwips.iWidth-(iPageMarginsInTwips.iLeft+iPageMarginsInTwips.iRight);

	return width-(iGutterMarginWidthInTwips+iLabelMarginWidthInTwips);

	}

/**

 Gets the label margin width in pixels.

 @return Label margin width in pixels.

 */

TInt CTextPageRegionPrinter::LabelMarginWidthInPixels()	const

	{

	return iImageDevice->HorizontalTwipsToPixels(iLabelMarginWidthInTwips);

	}

/**

 Get the text start X in pixels.

 @return text start X in pixels.

 */

TInt CTextPageRegionPrinter::TextStartXInPixels() const

	{

	if (iLabelMarginWidthInTwips==0)

		return iImageDevice->HorizontalTwipsToPixels(iPageMarginsInTwips.iLeft);

	else

		return 0;

	}

/**

 Calculates the docPos at the top of this page, by summing throught the CharsPerPage.

 Can be called for aPage==0, when loop not entered.

 @return Explanation of the object returned

 @param aPage Page Number.

 */

void CTextPageRegionPrinter::SetPageL(TInt aPage)

	{

	TInt pagesToScroll=0;

	TInt pageTextHeightInPixels=0;		//To stop warning

	iCurrentPage=aPage;

	iTopPageDocPos=0;

	TInt page=iFirstPage;

	SetFormatAndImageDevices();

	while (page<aPage)

		{

		__ASSERT_DEBUG((*iPageList)[page-iFirstPage]>=0,FormPanic(EFInvalidPageList));

		if ((*iPageList)[page-iFirstPage]>0)

			{

			iTopPageDocPos+=(*iPageList)[page-iFirstPage];

			pagesToScroll=0;

			}

		else

			++pagesToScroll;

		page++;

		//Count zeros --> n

		}

	__ASSERT_DEBUG((*iPageList)[iCurrentPage-iFirstPage]>=0,FormPanic(EFInvalidPageList));

	TInt bottomPageDocPos=iTopPageDocPos+(*iPageList)[iCurrentPage-iFirstPage]-1;

	if (bottomPageDocPos<iTopPageDocPos)

		++bottomPageDocPos;

	__ASSERT_DEBUG(iTopPageDocPos<=iLayout->DocumentLength(),FormPanic(EFInvalidPageList));

	__ASSERT_DEBUG(bottomPageDocPos>=0 && bottomPageDocPos<=iLayout->DocumentLength(),FormPanic(EFInvalidPageList));

	__ASSERT_DEBUG(bottomPageDocPos>=iTopPageDocPos,FormPanic(EFInvalidPageList));

	if (pagesToScroll>0)

		pageTextHeightInPixels=iImageDevice->VerticalTwipsToPixels(iPageSizeInTwips.iHeight-iPageMarginsInTwips.iTop-iPageMarginsInTwips.iBottom);

	iLayout->DiscardFormat();

	TRAPD(err,iLayout->FormatCharRangeL(iTopPageDocPos,bottomPageDocPos,pagesToScroll*pageTextHeightInPixels));

	//Scroll by n*Page Height

	if (err)

		LeaveL(err);

	}

void CTextPageRegionPrinter::LeaveL(TInt aErr)

//

// There is not enough memory to do the formatting, or other leave

// Reset everything.

//

	{

	iCurrentPage=KMinTInt32;

	iLayout->DiscardFormat();

	delete iGc;

	iGc=NULL;

	delete iPictureGc;

	iPictureGc=NULL;

	User::Leave(aErr);

	}