2 * fbpad - a small linux framebuffer virtual terminal
4 * Copyright (C) 2009-2011 Ali Gholami Rudi <ali at rudi dot ir>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License, as published by the
8 * Free Software Foundation.
16 #include <sys/ioctl.h>
26 #define CTRLKEY(x) ((x) - 96)
27 #define BADPOLLFLAGS (POLLHUP | POLLERR | POLLNVAL)
28 #define NTAGS sizeof(tags)
29 #define NTERMS (NTAGS * 2)
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 showterm(int n
)
56 if (ctag
!= n
% NTAGS
)
58 term_save(&terms
[cterm()]);
60 tops
[ctag
] = n
/ NTAGS
;
61 term_load(&terms
[n
], hidden
? TERM_HIDDEN
: TERM_REDRAW
);
64 static void showtag(int n
)
66 showterm(tops
[n
] * NTAGS
+ n
);
69 static struct term
*mainterm(void)
71 if (terms
[cterm()].fd
)
72 return &terms
[cterm()];
76 static void exec_cmd(char *file
)
82 static int altterm(int n
)
84 return n
< NTAGS
? n
+ NTAGS
: n
- NTAGS
;
87 static void nextterm(void)
89 int n
= (cterm() + 1) % NTERMS
;
90 while (n
!= cterm()) {
99 static void showtags(void)
101 int colors
[] = {15, 4, 2};
103 int r
= pad_rows() - 1;
105 pad_put('T', r
, c
++, FGCOLOR
, BGCOLOR
);
106 pad_put('A', r
, c
++, FGCOLOR
, BGCOLOR
);
107 pad_put('G', r
, c
++, FGCOLOR
, BGCOLOR
);
108 pad_put('S', r
, c
++, FGCOLOR
, BGCOLOR
);
109 pad_put(':', r
, c
++, FGCOLOR
, BGCOLOR
);
110 pad_put(' ', r
, c
++, FGCOLOR
, BGCOLOR
);
111 for (i
= 0; i
< NTAGS
; i
++) {
115 if (terms
[altterm(i
)].fd
)
117 pad_put(i
== ctag
? '(' : ' ', r
, c
++, FGCOLOR
, BGCOLOR
);
118 pad_put(tags
[i
], r
, c
++, colors
[nt
], 7);
119 pad_put(i
== ctag
? ')' : ' ', r
, c
++, FGCOLOR
, BGCOLOR
);
123 static void directkey(void)
127 switch ((c
= readchar())) {
139 showterm(altterm(cterm()));
157 if (strchr(tags
, c
)) {
158 showtag(strchr(tags
, c
) - tags
);
165 if (c
!= -1 && mainterm())
169 static void temp_switch(int termid
)
171 if (termid
!= cterm()) {
172 term_save(&terms
[cterm()]);
173 term_load(&terms
[termid
], TERM_HIDDEN
);
177 static void switch_back(int termid
)
179 if (termid
!= cterm()) {
180 term_save(&terms
[termid
]);
181 term_load(&terms
[cterm()], hidden
? TERM_HIDDEN
: TERM_VISIBLE
);
185 static int poll_all(void)
187 struct pollfd ufds
[NTERMS
+ 1];
188 int term_idx
[NTERMS
+ 1];
191 ufds
[0].fd
= STDIN_FILENO
;
192 ufds
[0].events
= POLLIN
;
193 for (i
= 0; i
< NTERMS
; i
++) {
195 ufds
[n
].fd
= terms
[i
].fd
;
196 ufds
[n
].events
= POLLIN
;
200 if (poll(ufds
, n
, 1000) < 1)
202 if (ufds
[0].revents
& BADPOLLFLAGS
)
204 if (ufds
[0].revents
& POLLIN
)
206 for (i
= 1; i
< n
; i
++) {
207 temp_switch(term_idx
[i
]);
208 if (ufds
[i
].revents
& POLLIN
)
210 if (ufds
[i
].revents
& BADPOLLFLAGS
)
212 switch_back(term_idx
[i
]);
217 static void mainloop(void)
219 struct termios oldtermios
, termios
;
220 tcgetattr(STDIN_FILENO
, &termios
);
221 oldtermios
= termios
;
223 tcsetattr(STDIN_FILENO
, TCSAFLUSH
, &termios
);
224 term_load(&terms
[cterm()], TERM_REDRAW
);
228 tcsetattr(STDIN_FILENO
, 0, &oldtermios
);
231 static void signalreceived(int n
)
238 term_save(&terms
[cterm()]);
239 term_load(&terms
[cterm()], TERM_HIDDEN
);
240 ioctl(STDIN_FILENO
, VT_RELDISP
, 1);
245 term_save(&terms
[cterm()]);
246 term_load(&terms
[cterm()], TERM_REDRAW
);
249 while (waitpid(-1, 0, WNOHANG
) > 0)
255 static void setupsignals(void)
258 vtm
.mode
= VT_PROCESS
;
260 vtm
.relsig
= SIGUSR1
;
261 vtm
.acqsig
= SIGUSR2
;
263 ioctl(STDIN_FILENO
, VT_SETMODE
, &vtm
);
265 signal(SIGUSR1
, signalreceived
);
266 signal(SIGUSR2
, signalreceived
);
267 signal(SIGCHLD
, signalreceived
);
272 char *hide
= "\x1b[?25l";
273 char *clear
= "\x1b[2J\x1b[H";
274 char *show
= "\x1b[?25h";
275 write(STDOUT_FILENO
, clear
, strlen(clear
));
276 write(STDIN_FILENO
, hide
, strlen(hide
));
279 fcntl(STDIN_FILENO
, F_SETFL
,
280 fcntl(STDIN_FILENO
, F_GETFL
) | O_NONBLOCK
);
283 write(STDIN_FILENO
, show
, strlen(show
));