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147 lines
5.5 KiB
147 lines
5.5 KiB
/***************************************************************************
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* Copyright (C) 2005 by Stefan Kebekus *
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* kebekus@kde.org *
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* *
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* Copyright (C) 2005 by Wilfried Huss *
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* Wilfried.Huss@gmx.at *
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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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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#ifndef _DJVURENDERER_H_
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#define _DJVURENDERER_H_
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#include <kprogress.h>
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#include <qpixmap.h>
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#include "DjVuImage.h"
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#include "DjVuDocEditor.h"
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#include "DjVuText.h"
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#include "DjVuToPS.h"
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#include "ByteStream.h"
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#include "documentRenderer.h"
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class RenderedDocumentPage;
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/*! \brief Well-documented minimal implementation of a documentRenderer
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This class provides a well-documented reference implementation of a
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documentRenderer, suitable as a starting point for a real-world
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implementation. This class is responsible for document loading and
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rendering. Apart from the constructor and the descructor, it
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implements only the necessary methods setFile() and drawPage(). The
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method setFile() ignores the file content and simulates a document
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with 10 empty pages of A4 size and a few anchors and bookmarks.
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*/
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class DjVuRenderer : public DocumentRenderer
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{
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Q_OBJECT
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public:
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/** Default constructor
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This constructor simply prints a message and calls the default constructor.
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*/
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DjVuRenderer(QWidget* parent);
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/** Destructor
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The destructor simply prints a message. It uses the mutex to
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ensure that this class is not destructed while another thread
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is currently using it.
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*/
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~DjVuRenderer();
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/** Opening a file
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This implementation does the necessary consistency checks and
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complains, e.g. if the file does not exist, but otherwise completely
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disregards the file content. It simulates a document of 10 empty pages of
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A4 size, with a few sample bookmarks and anchors "p1", "p2", "p3"
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for page 1, 2 and 3, respectively.
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@param fname the name of the file that should be opened.
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*/
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virtual bool setFile(const QString& fname, const KURL &);
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/** Rendering a page
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@param res resolution at which drawing should take place
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@param page pointer to a page structur on which we should draw
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*/
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virtual void drawPage(double res, RenderedDocumentPage* page);
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/** Extract the hidden text layer
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This function decodes the hidden text layer without actually decoding the full page.
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It is therefore much faster then drawPage if you only need the text information.
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*/
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virtual void getText(RenderedDocumentPage* page);
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virtual bool supportsTextSearch() const { return true; };
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/** DJVU to PostScript conversion
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This method uses the converter to convert the document to a PostScript.
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@param converter a DjVuToPS converter, whose options should already
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be set to
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@param filename name of the PostScript file to generate
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@param pageList list of pages that are to be converted, with the
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usual convention that "1" means "first page"
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@returns 'true' if the conversion was successful, 'false' if it
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wasn't. The conversion can fail, for example, when the user aborts
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the operation.
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*/
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bool convertToPSFile( DjVuToPS &converter, QString filename, QValueList<int> &pageList );
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/** Deletes pages from the document */
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void deletePages(Q_UINT16 from, Q_UINT16 to);
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/** Saves the file */
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bool save(const QString &filename);
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private:
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/* This method is called after a document is loaded with
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create_wait() or has been modified (e.g. inserting/deleting
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pages). It sets "numPages", fills the "pageSizes" array, and
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clear the anchorList. */
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bool initializeDocument();
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void getAnnotations(RenderedDocumentPage* page, GP<DjVuImage> djvuPage);
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bool getPageInfo(GP<DjVuFile> file, int& width, int& height, int& dpi);
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GP<DjVuTXT> getText(PageNumber pageNumber);
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void fillInText(RenderedDocumentPage* page, const GP<DjVuTXT>& text, DjVuTXT::Zone& zone, QSize& djvuPageSize);
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GP<DjVuDocEditor> document;
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/** Method used internally to report the progress of the DjVu to
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PostScript conversion */
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static void printerInfoCallBack(int page_num, int page_count, int tot_pages, DjVuToPS::Stage, void *);
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QPixmap pixmap;
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GP<ByteStream> PPMstream;
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};
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#endif
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