include/printer.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 struct environment {
  22   int fontno;
  23   int size;
  24   int hpos;
  25   int vpos;
  26   int height;
  27   int slant;
  28 };
  29
  30 struct font;
  31
  32 struct font_pointer_list {
  33   font *p;
  34   font_pointer_list *next;
  35
  36   font_pointer_list(font *, font_pointer_list *);
  37 };
  38
  39 class printer {
  40 public:
  41   printer();
  42   virtual ~printer();
  43   void load_font(int i, const char *name);
  44   void set_ascii_char(unsigned char c, const environment *env,
  45                       int *widthp = 0);
  46   void set_special_char(const char *nm, const environment *env,
  47                         int *widthp = 0);
  48   void set_numbered_char(int n, const environment *env, int *widthp = 0);
  49   virtual void draw(int code, int *p, int np, const environment *env);
  50   virtual void begin_page(int) = 0;
  51   virtual void end_page() = 0;
  52   virtual font *make_font(const char *nm);
  53   virtual void end_of_line();
  54   virtual void special(char *arg, const environment *env);
  55 protected:
  56   font_pointer_list *font_list;
  57 private:
  58   font **font_table;
  59   int nfonts;
  60   font *find_font(const char *);
  61   virtual void set_char(int index, font *f, const environment *env,
  62                         int w) = 0;
  63 };
  64
  65 printer *make_printer();