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