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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
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