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/*
prerex.h -- header file for an interactive editor of prerequisite-chart
descriptions
Copyright (c) 2005-19 R. D. Tennent
School of Computing, Queen's University, rdt@cs.queensu.ca
This program 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 2 of the License, or (at your
option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "config.h"
# include <stdlib.h>
# include <stdio.h>
# include <math.h>
# include <ctype.h>
# include <limits.h>
# include <string.h>
# ifdef HAVE_LIBREADLINE
# include <readline/readline.h>
# include <readline/history.h>
# else
# include <editline/readline.h>
# include <histedit.h>
# endif
# include <unistd.h>
# include <signal.h>
# include <unistd.h>
# include <sys/types.h>
# include <assert.h>
# include <getopt.h>
# define bool _Bool
# define true 1
# define false 0
# define LINE_LEN 1023
# define FILE_LEN 127
# define COMMAND_LEN 63
# define CODE_LEN 31
# define TITLE_LEN 127
# define TIMETABLE_LEN 31
# define COLOR_LEN 31
# define PRIVATE static
typedef int coord;
typedef struct point
{
coord x, y;
} point;
typedef enum req_opt_type
{ NEITHER, REQ, OPT} req_opt_type;
typedef struct box
{
bool half;
req_opt_type req_opt;
char title[TITLE_LEN + 1];
char timetable[TIMETABLE_LEN + 1];
char color[COLOR_LEN +1]; /* null string for default color */
} box;
typedef enum triv_type
{ TRIV } triv_type;
typedef struct mini
{
triv_type t;
} mini;
typedef struct text
{
char txt[LINE_LEN+1];
} text;
typedef char CourseCode[CODE_LEN + 1];
typedef enum node_type
{ BOX, MINI, TEXT } node_type;
typedef struct node
{
point at;
CourseCode code;
node_type tag;
union
{
box b;
mini m;
text t;
} u;
} node;
typedef struct element *element_ptr;
typedef enum arrow_type
{ PREREQ, COREQ, RECOMM } arrow_type;
typedef struct arrow
{
element_ptr source, target;
bool DefaultCurvature;
coord curvature;
arrow_type tag;
} arrow;
typedef enum element_type
{ NODE, ARROW } element_type;
typedef struct element
{
element_ptr next; /* to next element of linked list */
element_type tag;
union
{
node n;
arrow a;
} u;
} element;
typedef struct done *done_ptr; /* declarations to support undo commands */
typedef enum done_type
{
NODE_CREATE, NODE_EDIT, NODE_DELETE, NODE_SHIFT, NODE_RAISE,
ARROW_CREATE, ARROW_EDIT, ARROW_DELETE,
SHIFT_ALL, RAISE_ALL, CUT, PASTE,
COMPOSITE
} done_type;
typedef struct done
{
done_ptr next;
done_type tag;
int i;
node n;
arrow a;
point p;
element_ptr e;
} done;
/******************************************************************************************/
/* */
/* defined in utils.c: */
/* */
/******************************************************************************************/
extern size_t append (char *dst, char **offset, const char *src, size_t n);
/* Copies src to *offset and updates *offset accordingly (if possible).
* Assumes *offset is dst if offset == NULL.
* The src string must be null-terminated.
* Execution aborts unless **offset == '\0'.
* Returns (original offset - dst) + strlen(src); if >= n, the string was truncated.
*/
extern bool prefix (const char *cs, const char *ct); /* is string cs[] a prefix of ct[]? */
extern bool suffix (const char *cs, const char *ct); /* is string cs[] a suffix of ct[]? */
extern void error (char msg[]); /* abort with stderr message msg */
extern void copy (FILE * f, FILE * g);
extern bool inrange ( coord x, coord x0, coord x1);
/* is coordinate x in the range x0:x1? */
/******************************************************************************************/
/* */
/* defined in prerex.c: */
/* */
/******************************************************************************************/
# ifdef HAVE_LIBEDIT
extern EditLine *el;
extern History *hist;
extern HistEvent ev;
# endif
extern bool grid; /* should the background grid be enabled? */
extern bool reprocess; /* should the tex file be re-processed after the current command? */
extern char chartfilename[FILE_LEN];
extern char *chartfilename_n;
extern char backup_filename[FILE_LEN + 1];
extern char *backup_filename_n;
extern FILE *tex_file;
extern FILE *backup_tex_file;
extern void regenerate_and_process (void); /* internal rep. -> tex file -> pdf file */
/******************************************************************************************/
/* */
/* defined in inout.c: */
/* */
/******************************************************************************************/
extern element *first_node;
extern bool insert_node (element * pc);
extern element *first_arrow;
extern bool insert_arrow (element * pa);
extern bool eq (point p, point q); /* p == q ? */
extern element *node_at (point p);
extern void analyze_tex_file (void); /* tex file -> internal representation */
extern void regenerate_tex_file (void); /* internal representation -> tex file */
extern void close_files (void);
/******************************************************************************************/
/* */
/* defined in edit.c: */
/* */
/******************************************************************************************/
extern char deftext[LINE_LEN]; /* buffer for default input */
# ifdef HAVE_LIBREADLINE
extern int set_deftext (void); /* used by readline to output defaults */
# else
extern char * prompt_f (void); /* used to output prompts */
# endif
extern char * Readline ( char * str );
extern void process_commands (void); /* command-processing loop */
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