author | William Roberts <williamr@symbian.org> |
Tue, 16 Mar 2010 16:12:26 +0000 | |
branch | Symbian2 |
changeset 2 | 2fe1408b6811 |
parent 0 | 061f57f2323e |
permissions | -rw-r--r-- |
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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#ifndef __FRMPAGE_H__ |
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#define __FRMPAGE_H__ |
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#include <e32std.h> |
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#include <e32base.h> |
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#include <gdi.h> |
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class MLayDoc; |
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class CTextLayout; |
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class CParaFormat; |
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// |
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// The following two classes are for internal use only |
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// |
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/** |
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@internalComponent |
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*/ |
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struct TPageLine |
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{ |
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TInt iDocPos; |
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TInt iLineHeight; |
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TBool iKeepWithNext; |
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TBool iStartNewPage; |
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}; |
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/** |
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@internalComponent |
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*/ |
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class TLinePaginator |
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{ |
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public: |
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TLinePaginator(); |
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TBool AppendLineL(TPageLine aLine); |
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void FlushL(TInt aEndDocPos); |
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void SetPageHeight(TInt aPageHeight); |
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void SetArray(CArrayFix<TInt>* aCharsPerPage); |
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void Reset(); |
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private: |
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void ResetArray(); |
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void InsertPageBreakL(); |
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void SetPotentialBreakPoint(TInt aDocPos); |
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void CheckTallLineL(TPageLine& aLine); |
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private: |
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CArrayFix<TInt>* iPageList; // This is created and destroyed by the application running the paginator. |
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TInt iDocPos; |
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TBool iKeepWithPrev; |
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TInt iPageHeight; |
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TInt iHeightRem; |
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TBool iBreakOnPage; |
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TInt iPrevPageBreak; |
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TInt iHeightLines; |
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TBool iFirstLine; // Used to prevent page break being inserted at top of document. |
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}; |
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/** |
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An abstract class which must be mixed with application calling the active object. |
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It specifies the protocol for a pagination observer. A |
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pagination observer may be used when paginating a document in the background |
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(using CTextPaginator::PaginateCompleteDocumentL()). It notifies the client |
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on page completion, document completion, and on errors. |
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The observer is set up using the function CTextPaginator::SetObserver(). |
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@publishedAll |
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@released |
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*/ |
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class MPaginateObserver |
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{ |
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public: |
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/** Notifies the client on completion of document pagination. */ |
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virtual void NotifyCompletion()=0; |
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/** Notifies the client when a leave is trapped or when the pagination is cancelled. |
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Implements error handling. |
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@param anErrorCode Error code - indicates the type of error. */ |
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virtual void NotifyError(TInt anErrorCode)=0; |
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/** Called by the paginator when each page has been completed. |
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@param aCurrentPageNum The number of the page. */ |
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virtual void NotifyPageCompletion(TInt aCurrentPageNum)=0; |
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}; |
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/** |
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Paginates a document. |
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Sets the page dimensions, the printer device and the source document to paginate. |
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Uses a page list, which is an array of characters-per-page values. |
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There are two ways of paginating a document; either in the background using |
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an active object or by incrementally adding text to the document and repeatedly |
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notifying the CTextPaginator object to paginate the added text. If an active |
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object is used, the client may be notified on completion of pages, on trapped |
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leaves and on completion of the pagination by an optional pagination observer. |
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@publishedAll |
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@released |
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*/ |
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class CTextPaginator : public CActive |
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{ |
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public: |
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// 2 phase ctor: automatically adds self to active scheduler |
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IMPORT_C static CTextPaginator* NewL(CPrinterDevice* aPrinterDevice,CArrayFix<TInt>* aCharsPerPage,TInt aPriority); |
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IMPORT_C ~CTextPaginator(); |
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IMPORT_C void SetDocumentL(MLayDoc* aLayDoc); // Must call before anything else |
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IMPORT_C void SetPrinterDevice(CPrinterDevice* aPrinterDevice); |
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IMPORT_C void SetPageSpecInTwips(const TPageSpec& aPageSpec); // Physical size of page. |
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IMPORT_C void SetPageMarginsInTwips(const TMargins& aPageMargins); // Default are all zero. |
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IMPORT_C void SetTextMarginWidthsInTwips(TInt aLabelMarginWidth,TInt aGutterMarginWidth); // label margins (if any) |
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// Called to initiate paginating a document using active object |
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IMPORT_C void SetObserver(MPaginateObserver* aObserver); |
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IMPORT_C void PaginateCompleteDocumentL(); |
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// Called to paginate incrementally, without active object |
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IMPORT_C TInt AppendTextL(TInt& aCumulativeDocPos); // returns number of page breaks so far |
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IMPORT_C TInt PaginationCompletedL(); // called at end of incremental pagination - returns total number of page breaks |
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private: |
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enum TPaginateMode |
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{ |
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EFPaginateCompleteDocument, |
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EFPaginateIncrementally |
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}; |
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enum |
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{ |
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EPageLineArrayGranularity=10, |
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EPageListArrayGranularity=5 |
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}; |
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enum |
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{ |
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EFMaximumNumberLinesInBlock=20 |
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}; |
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private: |
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CTextPaginator(TInt aPriority); |
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void RunL(); // Active scheduler is friend - can access |
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void DoCancel(); // Called by CActive::Cancel() |
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void ConstructL(CPrinterDevice* aPrinterDevice,CArrayFix<TInt>* aCharsPerPage); |
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void SetLayoutDimensions(); |
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void SetOrReplaceDocumentL(MLayDoc* aLayDoc); |
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TRect TextRectInTwips() const; |
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TSize TextSizeInPixels() const; |
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void TrapPaginateParagraphL(); |
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void PaginateParagraphL(); |
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void PageCompleted(); |
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void Reque(); |
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void ResetPaginator(); |
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void CopyTempPageListL(); // Copies temporary page list to real one. |
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void LeaveL(TInt aErr); |
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private: |
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MLayDoc* iLayDoc; |
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MPaginateObserver* iObserver; |
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CPrinterDevice* iPrinterDevice; |
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TLinePaginator iPaginator; |
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CTextLayout* iLayout; |
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CArrayFix<TInt>* iPageList; |
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CArrayFixFlat<TInt>* iTempPageList; |
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CArrayFixFlat<TPageLine>* iPageLineArray; |
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TSize iPageSizeInTwips; |
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TMargins iPageMarginsInTwips; |
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TInt iGutterMarginWidthInTwips; // Gap between labels and text proper - in twips |
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TInt iLabelMarginWidthInTwips; |
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TInt iDocPos; // Within the laydoc |
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TBool iPageBreakChar; |
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TPaginateMode iMode; |
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}; |
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#endif |