1
2
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4
5
6#include "toys.h"
7
8int tty_fd(void)
9{
10 int i, j;
11
12 for (i = 0; i<3; i++) if (isatty(j = (i+1)%3)) return j;
13
14 return notstdio(open("/dev/tty", O_RDWR));
15}
16
17
18
19
20
21int terminal_size(unsigned *xx, unsigned *yy)
22{
23 struct winsize ws;
24 unsigned i, x = 0, y = 0;
25 char *s;
26
27
28 for (i=0; i<3; i++) {
29 memset(&ws, 0, sizeof(ws));
30 if (!ioctl(i, TIOCGWINSZ, &ws)) {
31 if (ws.ws_col) x = ws.ws_col;
32 if (ws.ws_row) y = ws.ws_row;
33
34 break;
35 }
36 }
37 s = getenv("COLUMNS");
38 if (s) sscanf(s, "%u", &x);
39 s = getenv("LINES");
40 if (s) sscanf(s, "%u", &y);
41
42
43 if (xx && x) *xx = x;
44 if (yy && y) *yy = y;
45
46 return x || y;
47}
48
49
50
51
52
53int terminal_probesize(unsigned *xx, unsigned *yy)
54{
55 if (terminal_size(xx, yy) && (!xx || *xx) && (!yy || *yy)) return 1;
56
57
58
59 xprintf("\e[s\e[999C\e[999B\e[6n\e[u");
60
61 return 0;
62}
63
64
65
66int scan_key_getsize(char *scratch, int miliwait, unsigned *xx, unsigned *yy)
67{
68 int key;
69
70 if (512&(key = scan_key(scratch, miliwait))) {
71 if (key>0) {
72 if (xx) *xx = (key>>10)&1023;
73 if (yy) *yy = (key>>20)&1023;
74
75 return -3;
76 }
77 }
78
79 return key;
80}
81
82
83int set_terminal(int fd, int raw, struct termios *old)
84{
85 struct termios termio;
86
87
88 if (!tcgetattr(fd, &termio) && old) *old = termio;
89
90
91
92
93
94
95 termio.c_iflag = IXANY|ICRNL|INLCR;
96 if (toys.which->flags & TOYFLAG_LOCALE) termio.c_iflag |= IUTF8;
97
98
99 termio.c_oflag = ONLCR|OPOST;
100
101
102
103
104
105
106
107
108
109 termio.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN;
110
111 if (raw) cfmakeraw(&termio);
112
113 return tcsetattr(fd, TCSANOW, &termio);
114}
115
116void xset_terminal(int fd, int raw, struct termios *old)
117{
118 if (-1 == set_terminal(fd, raw, old)) perror_exit("bad tty fd#%d", fd);
119}
120
121struct scan_key_list {
122 char *name, *seq;
123} static const scan_key_list[] = TAGGED_ARRAY(KEY,
124
125 {"UP", "\033[A"}, {"DOWN", "\033[B"}, {"RIGHT", "\033[C"}, {"LEFT", "\033[D"},
126 {"PGUP", "\033[5~"}, {"PGDN", "\033[6~"}, {"HOME", "\033OH"},
127 {"END", "\033OF"}, {"INSERT", "\033[2~"},
128
129 {"F1", "\033OP"}, {"F2", "\033OQ"}, {"F3", "\033OR"}, {"F4", "\033OS"},
130 {"F5", "\033[15~"}, {"F6", "\033[17~"}, {"F7", "\033[18~"},
131 {"F8", "\033[19~"}, {"F9", "\033[20~"},
132
133 {"SUP", "\033[1;2A"}, {"AUP", "\033[1;3A"}, {"CUP", "\033[1;5A"},
134 {"SDOWN", "\033[1;2B"}, {"ADOWN", "\033[1;3B"}, {"CDOWN", "\033[1;5B"},
135 {"SRIGHT", "\033[1;2C"}, {"ARIGHT", "\033[1;3C"}, {"CRIGHT", "\033[1;5C"},
136 {"SLEFT", "\033[1;2D"}, {"ALEFT", "\033[1;3D"}, {"CLEFT", "\033[1;5D"},
137
138 {"SF1", "\033O1;2P"}, {"AF1", "\033O1;3P"}, {"CF1", "\033[1;5P"}
139);
140
141
142
143
144
145
146
147
148int scan_key(char *scratch, int miliwait)
149{
150 struct pollfd pfd;
151 int maybe, i, j;
152 char *test;
153
154 for (;;) {
155 pfd.fd = 0;
156 pfd.events = POLLIN;
157 pfd.revents = 0;
158
159 maybe = 0;
160 if (*scratch) {
161 int pos[6];
162 unsigned x, y;
163
164
165 memset(pos, 0, 6*sizeof(int));
166 scratch[(1+*scratch)&15] = 0;
167 sscanf(scratch+1, "\033%n[%n%3u%n;%n%3u%nR%n", pos, pos+1, &y,
168 pos+2, pos+3, &x, pos+4, pos+5);
169 if (pos[5]) {
170
171 *scratch = 0;
172 return 512+(x<<10)+(y<<20);
173 } else for (i=0; i<6; i++) if (pos[i]==*scratch) maybe = 1;
174
175
176 for (i = 0; i<ARRAY_LEN(scan_key_list); i++) {
177 test = scan_key_list[i].seq;
178 for (j = 0; j<*scratch; j++) if (scratch[j+1] != test[j]) break;
179 if (j == *scratch) {
180 maybe = 1;
181 if (!test[j]) {
182
183 *scratch = 0;
184 return 256+i;
185 }
186 }
187 }
188
189
190 if (!maybe) break;
191 }
192
193
194
195
196 if (maybe || miliwait != -1)
197 if (!xpoll(&pfd, 1, maybe ? 30 : miliwait)) break;
198
199
200
201 if (toys.signal || 1 != read(0, scratch+1+*scratch, 1))
202 return toys.signal ? -3 : -1;
203 ++*scratch;
204 }
205
206
207 if (!*scratch) return -2;
208 i = scratch[1];
209 if (--*scratch) memmove(scratch+1, scratch+2, *scratch);
210
211 return i;
212}
213
214void tty_esc(char *s)
215{
216 printf("\033[%s", s);
217}
218
219void tty_jump(int x, int y)
220{
221 char s[32];
222
223 sprintf(s, "%d;%dH", y+1, x+1);
224 tty_esc(s);
225}
226
227void tty_reset(void)
228{
229 set_terminal(0, 0, 0);
230 tty_esc("?25h");
231 tty_esc("0m");
232 tty_jump(0, 999);
233 tty_esc("K");
234 fflush(0);
235}
236
237
238void tty_sigreset(int i)
239{
240 tty_reset();
241 _exit(i ? 128+i : 0);
242}
243