gnu/dist/groff/src/preproc/pic/object.h

   1 /*      $NetBSD$        */
   2
   3 // -*- C++ -*-
   4 /* Copyright (C) 1989, 1990, 1991, 1992, 2002, 2004
   5    Free Software Foundation, Inc.
   6      Written by James Clark (jjc@jclark.com)
   7
   8 This file is part of groff.
   9
  10 groff is free software; you can redistribute it and/or modify it under
  11 the terms of the GNU General Public License as published by the Free
  12 Software Foundation; either version 2, or (at your option) any later
  13 version.
  14
  15 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18 for more details.
  19
  20 You should have received a copy of the GNU General Public License along
  21 with groff; see the file COPYING.  If not, write to the Free Software
  22 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  23
  24 struct place;
  25
  26 enum object_type {
  27   OTHER_OBJECT,
  28   BOX_OBJECT,
  29   CIRCLE_OBJECT,
  30   ELLIPSE_OBJECT,
  31   ARC_OBJECT,
  32   SPLINE_OBJECT,
  33   LINE_OBJECT,
  34   ARROW_OBJECT,
  35   MOVE_OBJECT,
  36   TEXT_OBJECT,
  37   BLOCK_OBJECT,
  38   MARK_OBJECT
  39   };
  40
  41 struct bounding_box;
  42
  43 struct object {
  44   object *prev;
  45   object *next;
  46   object();
  47   virtual ~object();
  48   virtual position origin();
  49   virtual double width();
  50   virtual double radius();
  51   virtual double height();
  52   virtual position north();
  53   virtual position south();
  54   virtual position east();
  55   virtual position west();
  56   virtual position north_east();
  57   virtual position north_west();
  58   virtual position south_east();
  59   virtual position south_west();
  60   virtual position start();
  61   virtual position end();
  62   virtual position center();
  63   virtual place *find_label(const char *);
  64   virtual void move_by(const position &);
  65   virtual int blank();
  66   virtual void update_bounding_box(bounding_box *);
  67   virtual object_type type() = 0;
  68   virtual void print();
  69   virtual void print_text();
  70 };
  71
  72 typedef position (object::*corner)();
  73
  74 struct place {
  75   object *obj;
  76   double x, y;
  77 };
  78
  79 struct string_list;
  80
  81 class path {
  82   position pos;
  83   corner crn;
  84   string_list *label_list;
  85   path *ypath;
  86   int is_position;
  87 public:
  88   path(corner = 0);
  89   path(position);
  90   path(char *, corner = 0);
  91   ~path();
  92   void append(corner);
  93   void append(char *);
  94   void set_ypath(path *);
  95   int follow(const place &, place *) const;
  96 };
  97
  98 struct object_list {
  99   object *head;
 100   object *tail;
 101   object_list();
 102   void append(object *);
 103   void wrap_up_block(object_list *);
 104 };
 105
 106 declare_ptable(place)
 107
 108 // these go counterclockwise
 109 enum direction {
 110   RIGHT_DIRECTION,
 111   UP_DIRECTION,
 112   LEFT_DIRECTION,
 113   DOWN_DIRECTION
 114   };
 115
 116 struct graphics_state {
 117   double x, y;
 118   direction dir;
 119 };
 120
 121 struct saved_state : public graphics_state {
 122   saved_state *prev;
 123   PTABLE(place) *tbl;
 124 };
 125
 126
 127 struct text_item {
 128   text_item *next;
 129   char *text;
 130   adjustment adj;
 131   const char *filename;
 132   int lineno;
 133
 134   text_item(char *, const char *, int);
 135   ~text_item();
 136 };
 137
 138 const unsigned long IS_DOTTED = 01;
 139 const unsigned long IS_DASHED = 02;
 140 const unsigned long IS_CLOCKWISE = 04;
 141 const unsigned long IS_INVISIBLE = 020;
 142 const unsigned long HAS_LEFT_ARROW_HEAD = 040;
 143 const unsigned long HAS_RIGHT_ARROW_HEAD = 0100;
 144 const unsigned long HAS_SEGMENT = 0200;
 145 const unsigned long IS_SAME = 0400;
 146 const unsigned long HAS_FROM = 01000;
 147 const unsigned long HAS_AT = 02000;
 148 const unsigned long HAS_WITH = 04000;
 149 const unsigned long HAS_HEIGHT = 010000;
 150 const unsigned long HAS_WIDTH = 020000;
 151 const unsigned long HAS_RADIUS = 040000;
 152 const unsigned long HAS_TO = 0100000;
 153 const unsigned long IS_CHOPPED = 0200000;
 154 const unsigned long IS_DEFAULT_CHOPPED = 0400000;
 155 const unsigned long HAS_THICKNESS = 01000000;
 156 const unsigned long IS_FILLED = 02000000;
 157 const unsigned long IS_DEFAULT_FILLED = 04000000;
 158 const unsigned long IS_ALIGNED = 010000000;
 159 const unsigned long IS_SHADED = 020000000;
 160 const unsigned long IS_OUTLINED = 040000000;
 161
 162 struct segment {
 163   int is_absolute;
 164   position pos;
 165   segment *next;
 166   segment(const position &, int, segment *);
 167 };
 168
 169 class rectangle_object;
 170 class graphic_object;
 171 class linear_object;
 172
 173 struct object_spec {
 174   unsigned long flags;
 175   object_type type;
 176   object_list oblist;
 177   PTABLE(place) *tbl;
 178   double dash_width;
 179   position from;
 180   position to;
 181   position at;
 182   position by;
 183   path *with;
 184   text_item *text;
 185   double height;
 186   double radius;
 187   double width;
 188   double segment_width;
 189   double segment_height;
 190   double start_chop;
 191   double end_chop;
 192   double thickness;
 193   double fill;
 194   char *shaded;
 195   char *outlined;
 196   direction dir;
 197   segment *segment_list;
 198   position segment_pos;
 199   int segment_is_absolute;
 200
 201   object_spec(object_type);
 202   ~object_spec();
 203   object *make_object(position *, direction *);
 204   graphic_object *make_box(position *, direction *);
 205   graphic_object *make_block(position *, direction *);
 206   graphic_object *make_text(position *, direction *);
 207   graphic_object *make_ellipse(position *, direction *);
 208   graphic_object *make_circle(position *, direction *);
 209   linear_object *make_line(position *, direction *);
 210   linear_object *make_arc(position *, direction *);
 211   graphic_object *make_linear(position *, direction *);
 212   graphic_object *make_move(position *, direction *);
 213   int position_rectangle(rectangle_object *p, position *curpos,
 214                          direction *dirp);
 215 };
 216
 217
 218 object *make_object(object_spec *, position *, direction *);
 219
 220 object *make_mark_object();
 221 object *make_command_object(char *, const char *, int);
 222
 223 int lookup_variable(const char *name, double *val);
 224 void define_variable(const char *name, double val);
 225
 226 void print_picture(object *);
 227