include/printer.h

   1 /*@ The class `printer' performs the postprocessing.  Each postprocessor only
   2  *@ needs to implement a derived class of `printer' and a suitable function
   3  *@ `make_printer' for the device-dependent tasks.  Then the methods of class
   4  *@ `printer' are called automatically by `do_file()' in `input.cpp'.
   5  *
   6  * Copyright (c) 2014 Steffen (Daode) Nurpmeso <sdaoden@users.sf.net>.
   7  *
   8  * Copyright (C) 1989 - 1992, 2001 - 2004, 2006
   9  *    Free Software Foundation, Inc.
  10  *
  11  *    Written by James Clark (jjc@jclark.com)
  12  *
  13  *    groff is free software; you can redistribute it and/or modify it
  14  *    under the terms of the GNU General Public License as published by
  15  *    the Free Software Foundation; either version 2, or (at your option)
  16  *    any later version.
  17  *
  18  *    groff is distributed in the hope that it will be useful, but
  19  *    WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  *    General Public License for more details.
  22  *
  23  *    You should have received a copy of the GNU General Public License
  24  *    along with groff; see the file COPYING.  If not, write to the Free
  25  *    Software Foundation, 51 Franklin St - Fifth Floor, Boston, MA
  26  *    02110-1301, USA.
  27  */
  28 #ifndef _PRINTER_H
  29 #define _PRINTER_H
  30
  31 #include "config.h"
  32
  33 #include "color.h"
  34
  35 struct environment {
  36   int fontno;
  37   int size;
  38   int hpos;
  39   int vpos;
  40   int height;
  41   int slant;
  42   color *col;
  43   color *fill;
  44 };
  45
  46 class font;
  47
  48 class font_pointer_list
  49 {
  50 public:
  51   font *p;
  52   font_pointer_list *next;
  53
  54   font_pointer_list(font *, font_pointer_list *);
  55 };
  56
  57 class printer
  58 {
  59 public:
  60   printer();
  61   virtual ~printer();
  62   void load_font(int, const char *);
  63   void set_ascii_char(unsigned char, const environment *, int * = 0);
  64   void set_special_char(const char *, const environment *, int * = 0);
  65   virtual void set_numbered_char(int, const environment *, int * = 0);
  66   glyph *set_char_and_width(const char *, const environment *,
  67                             int *, font **);
  68   font *get_font_from_index(int);
  69   virtual void draw(int, int *, int, const environment *);
  70   // perform change of line color (text, outline) in the print-out
  71   virtual void change_color(const environment * const);
  72   // perform change of fill color in the print-out
  73   virtual void change_fill_color(const environment * const);
  74   virtual void begin_page(int) = 0;
  75   virtual void end_page(int) = 0;
  76   virtual font *make_font(const char *);
  77   virtual void end_of_line();
  78   virtual void special(char *, const environment *, char = 'p');
  79   virtual void devtag(char *, const environment *, char = 'p');
  80
  81 protected:
  82   font_pointer_list *font_list;
  83   font **font_table;
  84   int nfonts;
  85
  86   // information about named characters
  87   int is_char_named;
  88   int is_named_set;
  89   char named_command;
  90   const char *named_char_s;
  91   int named_char_n;
  92
  93 private:
  94   font *find_font(const char *);
  95   virtual void set_char(glyph *, font *, const environment *, int,
  96                         const char *) = 0;
  97 };
  98
  99 printer *make_printer();
 100
 101 #endif // _PRINTER_H
 102 // s-it2-mode