2 * fbpad - a small framebuffer virtual terminal
4 * Copyright (C) 2009-2011 Ali Gholami Rudi <ali at rudi dot ir>
6 * This program is released under GNU GPL version 2.
14 #include <sys/ioctl.h>
25 #define CTRLKEY(x) ((x) - 96)
26 #define BADPOLLFLAGS (POLLHUP | POLLERR | POLLNVAL)
27 #define NTAGS (sizeof(tags) - 1)
28 #define NTERMS (NTAGS * 2)
29 #define TERMOPEN(i) (terms[i].fd)
31 static char tags
[] = TAGS
;
32 static struct term terms
[NTERMS
];
33 static int tops
[NTAGS
]; /* top terms of tags */
34 static int ctag
; /* current tag */
35 static int ltag
; /* the last tag */
39 static int readchar(void)
42 if (read(STDIN_FILENO
, &b
, 1) > 0)
47 static int cterm(void)
49 return tops
[ctag
] * NTAGS
+ ctag
;
52 static void term_switch(int oidx
, int nidx
, int show
, int save
, int load
)
54 int flags
= show
? (load
? TERM_REDRAW
: TERM_VISIBLE
) : TERM_HIDDEN
;
55 term_save(&terms
[oidx
]);
56 term_load(&terms
[nidx
], flags
);
59 static void showterm(int n
)
63 if (ctag
!= n
% NTAGS
)
65 term_switch(cterm(), n
, !hidden
, !hidden
, !hidden
);
67 tops
[ctag
] = n
/ NTAGS
;
70 static void showtag(int n
)
72 showterm(tops
[n
] * NTAGS
+ n
);
75 static struct term
*mainterm(void)
77 if (TERMOPEN(cterm()))
78 return &terms
[cterm()];
82 static void exec_cmd(char *file
)
88 static int altterm(int n
)
90 return n
< NTAGS
? n
+ NTAGS
: n
- NTAGS
;
93 static void nextterm(void)
95 int n
= (cterm() + 1) % NTERMS
;
96 while (n
!= cterm()) {
101 n
= (n
+ 1) % NTERMS
;
105 static void showtags(void)
107 int colors
[] = {15, 4, 2};
109 int r
= pad_rows() - 1;
111 pad_put('T', r
, c
++, FGCOLOR
, BGCOLOR
);
112 pad_put('A', r
, c
++, FGCOLOR
, BGCOLOR
);
113 pad_put('G', r
, c
++, FGCOLOR
, BGCOLOR
);
114 pad_put('S', r
, c
++, FGCOLOR
, BGCOLOR
);
115 pad_put(':', r
, c
++, FGCOLOR
, BGCOLOR
);
116 pad_put(' ', r
, c
++, FGCOLOR
, BGCOLOR
);
117 for (i
= 0; i
< NTAGS
; i
++) {
121 if (TERMOPEN(altterm(i
)))
123 pad_put(i
== ctag
? '(' : ' ', r
, c
++, FGCOLOR
, BGCOLOR
);
124 pad_put(tags
[i
], r
, c
++, colors
[nt
], BGCOLOR
);
125 pad_put(i
== ctag
? ')' : ' ', r
, c
++, FGCOLOR
, BGCOLOR
);
129 static void directkey(void)
133 switch ((c
= readchar())) {
145 showterm(altterm(cterm()));
163 if (strchr(tags
, c
)) {
164 showtag(strchr(tags
, c
) - tags
);
171 if (c
!= -1 && mainterm())
175 static void temp_switch(int termid
)
177 if (termid
!= cterm())
178 term_switch(cterm(), termid
, 0, 0, 0);
181 static void switch_back(int termid
)
183 if (termid
!= cterm())
184 term_switch(termid
, cterm(), 1, 0, 0);
187 static int poll_all(void)
189 struct pollfd ufds
[NTERMS
+ 1];
190 int term_idx
[NTERMS
+ 1];
193 ufds
[0].fd
= STDIN_FILENO
;
194 ufds
[0].events
= POLLIN
;
195 for (i
= 0; i
< NTERMS
; i
++) {
197 ufds
[n
].fd
= terms
[i
].fd
;
198 ufds
[n
].events
= POLLIN
;
202 if (poll(ufds
, n
, 1000) < 1)
204 if (ufds
[0].revents
& BADPOLLFLAGS
)
206 if (ufds
[0].revents
& POLLIN
)
208 for (i
= 1; i
< n
; i
++) {
209 temp_switch(term_idx
[i
]);
210 if (ufds
[i
].revents
& POLLIN
)
212 if (ufds
[i
].revents
& BADPOLLFLAGS
)
214 switch_back(term_idx
[i
]);
219 static void mainloop(void)
221 struct termios oldtermios
, termios
;
222 tcgetattr(STDIN_FILENO
, &termios
);
223 oldtermios
= termios
;
225 tcsetattr(STDIN_FILENO
, TCSAFLUSH
, &termios
);
226 term_load(&terms
[cterm()], TERM_REDRAW
);
230 tcsetattr(STDIN_FILENO
, 0, &oldtermios
);
233 static void signalreceived(int n
);
234 static void signalregister(void)
236 signal(SIGUSR1
, signalreceived
);
237 signal(SIGUSR2
, signalreceived
);
238 signal(SIGCHLD
, signalreceived
);
241 static void signalreceived(int n
)
245 /* racy, new signals may arrive before re-registeration */
250 term_switch(cterm(), cterm(), 0, 1, 0);
251 ioctl(STDIN_FILENO
, VT_RELDISP
, 1);
256 term_switch(cterm(), cterm(), 1, 0, 1);
259 while (waitpid(-1, NULL
, WNOHANG
) > 0)
265 static void setupsignals(void)
268 vtm
.mode
= VT_PROCESS
;
270 vtm
.relsig
= SIGUSR1
;
271 vtm
.acqsig
= SIGUSR2
;
274 ioctl(STDIN_FILENO
, VT_SETMODE
, &vtm
);
279 char *hide
= "\x1b[?25l";
280 char *clear
= "\x1b[2J\x1b[H";
281 char *show
= "\x1b[?25h";
282 write(STDOUT_FILENO
, clear
, strlen(clear
));
283 write(STDIN_FILENO
, hide
, strlen(hide
));
287 fcntl(STDIN_FILENO
, F_SETFL
,
288 fcntl(STDIN_FILENO
, F_GETFL
) | O_NONBLOCK
);
292 write(STDIN_FILENO
, show
, strlen(show
));