gramscii.h - gramscii - A simple editor for ASCII box-and-arrow charts
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gramscii.h (3758B)
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1 #ifndef __GRAMSCII_H__
2 #define __GRAMSCII_H__
3
4 #define _POSIX_C_SOURCE 200112L
5
6 #include <stdio.h>
7 #include <termios.h>
8 #include <unistd.h>
9
10
11
12 /** constants **/
13
14 /* modes */
15 #define MOVE 0x00
16 #define BOX 0x01
17 #define ARROW 0x02
18 #define TEXT 0x04
19 #define DEL 0x08
20 #define VIS 0x10
21 #define PAR 0x20
22 #define REM 0x40
23 #define TRP 0x80
24 /**/
25
26 /* directions */
27 #define DIR_N 0x00
28 #define DIR_R 0x01
29 #define DIR_U 0x02
30 #define DIR_D 0x04
31 #define DIR_L 0x08
32
33 #define DIR_HOR (DIR_R | DIR_L)
34 #define DIR_VER (DIR_D | DIR_U)
35 /**/
36
37 /** box style **/
38 /* rectangular box */
39 #define BOX_RECT 0x00
40 /* parallelograms */
41 #define BOX_PAR 0x10
42 /* parallelogram (leaning right) */
43 #define BOX_PARR 0x11
44 /* parallelogram (leaning left) */
45 #define BOX_PARL 0x12
46 /* trapezium */
47 #define BOX_TRAP 0x20
48 #define BOX_TRAP_U 0x24
49 #define BOX_TRAP_D 0x28
50 #define BOX_TRAP_R 0x21
51 #define BOX_TRAP_C 0x22
52 #define BOX_TRAP_L 0x23
53 #define BOX_TRAP_UR 0x25
54 #define BOX_TRAP_UC 0x26
55 #define BOX_TRAP_UL 0x27
56 #define BOX_TRAP_DL 0x29
57 #define BOX_TRAP_DC 0x2a
58 #define BOX_TRAP_DR 0x2b
59 #define STYLE_IS(x, y) (((x) & (y) ) == y)
60 /**/
61
62 #define NOFIX 0x0
63 #define FIX 0x1
64
65 /* markers */
66 #define BG ' '
67 #define PTR '+'
68 #define UND '_'
69 #define ARR_L '<'
70 #define ARR_R '>'
71 #define ARR_U '^'
72 #define ARR_D 'v'
73 /**/
74
75 /* global positions */
76 #define HOME 0x01
77 #define END 0x02
78 #define MIDDLE 0x04
79 /**/
80
81 /* video modes */
82 #define VIDEO_NRM 0
83 #define VIDEO_REV 7
84 /**/
85
86 /* undo buffer elem types */
87 #define PRV_STATE 0x01
88 #define NEW_STATE 0x02
89 /**/
90
91 /* file types */
92 #define FFILE 0x01
93 #define FPIPE 0x02
94
95 /** types **/
96
97 typedef struct{
98 int sz;/* allocated size */
99 int n;/* line number */
100 int lst;/* last visible char (before the first \0) */
101 char *s;
102 } line_t;
103
104 typedef struct{
105 int sz;/* allocated size */
106 int num;/* number of lines stored */
107 line_t *l;
108 } lineset_t;
109
110 typedef struct{
111 int x;
112 int y;
113 } pos_t;
114
115
116 /** MACROS **/
117
118 #define MIN(x,y) (x) < (y) ? (x) : (y)
119 #define MAX(x,y) (x) > (y) ? (x) : (y)
120
121 #define progr_x(d) ((d) == DIR_L ? -1 : (d) == DIR_R ? 1 : 0)
122 #define progr_y(d) ((d) == DIR_U ? -1 : (d) == DIR_D ? 1 : 0)
123
124
125 /** screen-related functions **/
126 void reset_styles();
127 void redraw();
128 int move_around(char c, FILE *fc, char global);
129 void check_bound(int *x, int *y);
130 void status_bar();
131 void show_cursor();
132 void set_cur(char c);
133 void update_current();
134 void set_xy(int _x, int _y, char c);
135 void draw_xy(int x, int y, char c);
136 char get_mark(char dir);
137 void set_video(int v);
138 char get_key(FILE *fc, char *msg);
139 void get_string(FILE *fc, char *msg, char *s, int sz);
140 void erase_box(int x1, int y1, char c);
141 int is_yes(char c);
142 void init_screen();
143 void erase_line(int i);
144 void erase_screen();
145 void go_to(int where);
146 void crop_to_nonblank();
147 void crop_to_rect();
148 void erase_blank_lines(int y1, int y2);
149 int _isblank(int c);
150 void mark_pos(FILE *fc);
151 /**/
152
153 /** drawing-related functions **/
154 int change_style(char c);
155 void get_text(FILE *fc);
156 void get_box(FILE *fc, char st);
157 void get_arrow(FILE *fc);
158 void erase(FILE *fc);
159 void visual_box(FILE *fc);
160 void paste();
161 void undo_change();
162 void redo_change();
163 void get_comment(FILE *fc);
164 /**/
165
166 /** file-related functions **/
167 void write_file(FILE *fc);
168 void check_modified(FILE *fc);
169 void load_file(FILE *fc);
170 void new_file(FILE *fc);
171 void read_file_at(FILE *fc, int xl, int yl);
172 /**/
173
174 /** line-related functions **/
175 void dump_lines(lineset_t ls, FILE *f);
176 void alloc_line(line_t *l);
177 void ensure_line_length(line_t *l, int len);
178 void ensure_num_lines(lineset_t *ls, int n);
179 void yank_region(int x1, int y1, int x2, int y2);
180 void paste_region(int x1, int y1);
181 void copy_lines_to_ring(int y1, int y2, int which);
182 void invalidate_undo();
183 /**/
184
185 void cleanup(int);
186
187 #endif