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- // -*- C++ -*-
- /* Copyright (C) 1989, 1990 Free Software Foundation, Inc.
- Written by James Clark (jjc@jclark.uucp)
-
- This file is part of groff.
-
- groff is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 1, or (at your option) any later
- version.
-
- groff is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with groff; see the file LICENSE. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- struct place;
-
- enum object_type {
- OTHER_OBJECT,
- BOX_OBJECT,
- CIRCLE_OBJECT,
- ELLIPSE_OBJECT,
- ARC_OBJECT,
- SPLINE_OBJECT,
- LINE_OBJECT,
- ARROW_OBJECT,
- MOVE_OBJECT,
- TEXT_OBJECT,
- BLOCK_OBJECT,
- MARK_OBJECT
- };
-
- struct bounding_box;
-
- struct object {
- object *prev;
- object *next;
- object();
- virtual ~object();
- virtual position origin();
- virtual double width();
- virtual double radius();
- virtual double height();
- virtual position north();
- virtual position south();
- virtual position east();
- virtual position west();
- virtual position north_east();
- virtual position north_west();
- virtual position south_east();
- virtual position south_west();
- virtual position start();
- virtual position end();
- virtual position center();
- virtual place *find_label(const char *);
- virtual void move_by(const position &);
- virtual int blank();
- virtual void update_bounding_box(bounding_box *);
- virtual object_type type() = 0;
- virtual void print();
- virtual void print_text();
- };
-
- typedef position (object::*corner)();
-
- struct place {
- object *obj;
- double x, y;
- };
-
- struct string_list;
-
- class path {
- corner crn;
- string_list *label_list;
- public:
- path(corner = 0);
- path(char *, corner = 0);
- ~path();
- void append(corner);
- void append(char *);
- int follow(const place &, place *) const;
- };
-
- struct object_list {
- object *head;
- object *tail;
- object_list();
- void append(object *);
- void wrap_up_block(object_list *);
- };
-
- declare_ptable(place)
-
- // these go counterclockwise
- enum direction {
- RIGHT_DIRECTION,
- UP_DIRECTION,
- LEFT_DIRECTION,
- DOWN_DIRECTION
- };
-
- struct graphics_state {
- double x, y;
- direction dir;
- };
-
- struct saved_state : graphics_state {
- saved_state *prev;
- PTABLE(place) *tbl;
- };
-
-
- struct text_item {
- text_item *next;
- char *text;
- adjustment adj;
- const char *filename;
- int lineno;
-
- text_item(char *, const char *, int);
- ~text_item();
- };
-
-
- enum {
- IS_DOTTED = 01,
- IS_DASHED = 02,
- IS_CLOCKWISE = 04,
- IS_INVISIBLE = 020,
- HAS_LEFT_ARROW_HEAD = 040,
- HAS_RIGHT_ARROW_HEAD = 0100,
- HAS_SEGMENT = 0200,
- IS_SAME = 0400,
- HAS_FROM = 01000,
- HAS_AT = 02000,
- HAS_WITH = 04000,
- HAS_HEIGHT = 010000,
- HAS_WIDTH = 020000,
- HAS_RADIUS = 040000,
- HAS_TO = 0100000,
- IS_CHOPPED = 0200000,
- IS_DEFAULT_CHOPPED = 0400000,
- HAS_THICKNESS = 01000000,
- IS_FILLED = 02000000,
- IS_DEFAULT_FILLED = 04000000,
- IS_ALIGNED = 010000000,
- };
-
- struct segment {
- int is_absolute;
- position pos;
- segment *next;
- segment(const position &, int, segment *);
- };
-
- struct rectangle_object;
- struct graphic_object;
- struct linear_object;
-
- struct object_spec {
- unsigned flags;
- object_type type;
- object_list oblist;
- PTABLE(place) *tbl;
- double dash_width;
- position from;
- position to;
- position at;
- position by;
- path *with;
- text_item *text;
- double height;
- double radius;
- double width;
- double segment_width;
- double segment_height;
- double start_chop;
- double end_chop;
- double thickness;
- double fill;
- direction dir;
- segment *segment_list;
- position segment_pos;
- int segment_is_absolute;
-
- object_spec(object_type);
- ~object_spec();
- object *make_object(position *, direction *);
- graphic_object *make_box(position *, direction *);
- graphic_object *make_block(position *, direction *);
- graphic_object *make_text(position *, direction *);
- graphic_object *make_ellipse(position *, direction *);
- graphic_object *make_circle(position *, direction *);
- linear_object *make_line(position *, direction *);
- linear_object *make_arc(position *, direction *);
- graphic_object *make_linear(position *, direction *);
- graphic_object *make_move(position *, direction *);
- int position_rectangle(rectangle_object *p, position *curpos,
- direction *dirp);
- };
-
-
- object *make_object(object_spec *, position *, direction *);
-
- object *make_mark_object();
- object *make_command_object(char *, const char *, int);
-
- int lookup_variable(const char *name, double *val);
- void define_variable(const char *name, double val);
-
- void print_picture(object *);
-
-