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151 lines
5.2 KiB
151 lines
5.2 KiB
/***************************************************************************
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* Copyright (C) 2004 by Albert Astals Cid <tsdgeos@terra.es> *
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* Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#ifndef _KPDF_GENERATOR_PDF_H_
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#define _KPDF_GENERATOR_PDF_H_
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#include <tqmutex.h>
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#include <tqcolor.h>
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#include <tqstring.h>
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#include <tqthread.h>
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#include "core/generator.h"
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#include "core/document.h"
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#include "core/link.h"
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class Dict;
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class GfxFont;
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class LinkDest;
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class Ref;
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class PDFDoc;
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class GList;
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class TextPage;
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class ObjectRect;
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class KPDFOutputDev;
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class PDFPixmapGeneratorThread;
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/**
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* @short A generator that builds contents from a PDF document.
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*
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* All Generator features are supported and implented by this one.
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* Internally this holds a reference to xpdf's core objects and provides
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* contents generation using the PDFDoc object and a couple of OutputDevices
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* called KPDFOutputDev and KPDFTextDev (both defined in gp_outputdev.h).
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*
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* For generating page contents we tell PDFDoc to render a page and grab
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* contents from out OutputDevs when rendering finishes.
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*
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* Background asyncronous contents providing is done via a TQThread inherited
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* class defined at the bottom of the file.
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*/
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class PDFGenerator : public Generator
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{
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public:
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PDFGenerator( KPDFDocument * document );
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virtual ~PDFGenerator();
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// [INHERITED] load a document and fill up the pagesVector
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bool loadDocument( const TQString & fileName, TQValueVector<KPDFPage*> & pagesVector );
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// [INHERITED] document informations
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const DocumentInfo * generateDocumentInfo();
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const DocumentSynopsis * generateDocumentSynopsis();
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// [INHERITED] document informations
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bool isAllowed( int permissions );
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// [INHERITED] perform actions on document / pages
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bool canGeneratePixmap();
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void generatePixmap( PixmapRequest * request );
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void generateSyncTextPage( KPDFPage * page );
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// [INHERITED] capability querying
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bool supportsSearching() const;
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bool hasFonts() const;
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// [INHERITED] font related
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void putFontInfo(KListView *list);
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// [INHERITED] print page using an already configured kprinter
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bool print( KPrinter& printer );
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// [INHERITED] reply to some metadata requests
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TQString getMetaData( const TQString & key, const TQString & option );
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// [INHERITED] reparse configuration
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bool reparseConfig();
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private:
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// friend class to access private document related variables
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friend class PDFPixmapGeneratorThread;
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void scanFonts(Dict *resDict, KListView *list, Ref **fonts, int &fontsLen, int &fontsSize, TQValueVector<Ref> *visitedXObjects);
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void scanFont(GfxFont *font, KListView *list, Ref **fonts, int &fontsLen, int &fontsSize);
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void fillViewportFromLink( DocumentViewport &viewport, LinkDest *destination );
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// private functions for accessing document informations via PDFDoc
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TQString getDocumentInfo( const TQString & data, bool canReturnNull = false ) const;
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TQString getDocumentDate( const TQString & data ) const;
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// private function for creating the document synopsis hieracy
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void addSynopsisChildren( TQDomNode * parent, GList * items );
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// private function for creating the transition information
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void addTransition( int pageNumber, KPDFPage * page );
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// (async related) receive data from the generator thread
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void customEvent( TQCustomEvent * );
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// xpdf dependant stuff
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TQMutex docLock;
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PDFDoc * pdfdoc;
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KPDFOutputDev * kpdfOutputDev;
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TQColor paperColor;
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// asyncronous generation related stuff
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PDFPixmapGeneratorThread * generatorThread;
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// misc variables for document info and synopsis caching
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bool ready;
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PixmapRequest * pixmapRequest;
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bool docInfoDirty;
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DocumentInfo docInfo;
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bool docSynopsisDirty;
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DocumentSynopsis docSyn;
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};
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/**
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* @short A thread that builds contents for PDFGenerator in the background.
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*
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*/
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class PDFPixmapGeneratorThread : public TQThread
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{
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public:
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PDFPixmapGeneratorThread( PDFGenerator * generator );
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~PDFPixmapGeneratorThread();
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// set the request to the thread (it will be reparented)
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void startGeneration( PixmapRequest * request );
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// end generation
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void endGeneration();
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// methods for getting contents from the GUI thread
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TQImage * takeImage() const;
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TextPage * takeTextPage() const;
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TQValueList< ObjectRect * > takeObjectRects() const;
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private:
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// can't be called from the outside (but from startGeneration)
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void run();
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class PPGThreadPrivate * d;
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};
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#endif
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