1 files changed, 107 insertions, 0 deletions
diff --git a/kdvi/psgs.h b/kdvi/psgs.h
new file mode 100644
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+++ b/kdvi/psgs.h
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+// -*- C++ -*-
+//
+// ghostscript_interface
+//
+// Part of KDVI - A framework for multipage text/gfx viewers
+//
+// (C) 2004 Stefan Kebekus
+// Distributed under the GPL
+
+#ifndef _PSGS_H_
+#define _PSGS_H_
+
+#include <qcolor.h>
+#include <qobject.h>
+#include <qstring.h>
+#include <qintdict.h>
+
+class PageNumber;
+class QPainter;
+
+
+class pageInfo
+{
+public:
+  pageInfo(const QString& _PostScriptString);
+  ~pageInfo();
+
+  QColor    background;
+  QColor    permanentBackground;
+  QString   *PostScriptString;
+};
+
+
+class ghostscript_interface  : public QObject 
+{
+ Q_OBJECT
+
+public:
+  ghostscript_interface();
+  ~ghostscript_interface();
+
+  void clear();
+
+  // sets the PostScript which is used on a certain page
+  void setPostScript(const PageNumber& page, const QString& PostScript);
+
+  // sets path from additional postscript files may be read
+  void setIncludePath(const QString &_includePath);
+
+  // Sets the background color for a certain page. If permanent is false then the original 
+  // background color can be restored by calling restoreBackground(page).
+  // The Option permanent = false is used when we want to display a different paper 
+  // color as the one specified in the dvi file.
+  void setBackgroundColor(const PageNumber& page, const QColor& background_color, bool permanent = true);
+
+  // Restore the background to the color which was specified by the last call to setBackgroundColor()
+  // With option permanent = true.
+  void restoreBackgroundColor(const PageNumber& page);
+
+  // Draws the graphics of the page into the painter, if possible. If
+  // the page does not contain any graphics, nothing happens
+  void     graphics(const PageNumber& page, double dpi, long magnification, QPainter* paint);
+
+  // Returns the background color for a certain page. If no color was
+  // set, Qt::white is returned.
+  QColor   getBackgroundColor(const PageNumber& page) const;
+
+  QString  *PostScriptHeaderString;
+
+  /** This method tries to find the PostScript file 'filename' in the
+   DVI file's directory (if the base-URL indicates that the DVI file
+   is local), and, if that fails, uses kpsewhich to find the file. If
+   the file is found, the full path (including file name) is
+   returned. Otherwise, the method returns the first argument. TODO:
+   use the DVI file's baseURL, once this is implemented.
+  */
+  static  QString locateEPSfile(const QString &filename, const KURL &base);
+
+private:
+  void                  gs_generate_graphics_file(const PageNumber& page, const QString& filename, long magnification);
+  QIntDict<pageInfo>    pageList;
+
+  double                resolution;   // in dots per inch
+  int                   pixel_page_w; // in pixels
+  int                   pixel_page_h; // in pixels
+
+  QString               includePath;
+
+  // Output device that ghostscript is supposed tp use. Default is
+  // "png256". If that does not work, gs_generate_graphics_file will
+  // automatically try other known device drivers. If no known output
+  // device can be found, something is badly wrong. In that case,
+  // "gsDevice" is set to an empty string, and
+  // gs_generate_graphics_file will return immediately.
+  QValueListIterator<QString> gsDevice;
+
+  // A list of known devices, set by the constructor. This includes
+  // "png256", "pnm". If a device is found to not work, its name is
+  // removed from the list, and another device name is tried.
+  QStringList           knownDevices;
+
+signals:
+  /** Passed through to the top-level kpart. */
+  void setStatusBarText( const QString& );
+};
+
+#endif