fbpad.c

   1 #include <poll.h>
   2 #include <pty.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include "pad.h"
   6 #include "term.h"
   7 #include "util.h"
   8
   9 #define SHELL           "/bin/bash"
  10 #define TAGS            8
  11 #define CTRLKEY(x)      ((x) - 96)
  12
  13 static struct term_state terms[TAGS * 2];
  14 static int cterm;       /* current tag */
  15 static int lterm;       /* last tag */
  16 static int exitit;
  17
  18 static int readchar(void)
  19 {
  20         char b;
  21         if (read(STDIN_FILENO, &b, 1) > 0)
  22                 return (int) b;
  23         return -1;
  24 }
  25
  26 static void showterm(int n)
  27 {
  28         if (lterm % TAGS != cterm % TAGS)
  29                 lterm = cterm;
  30         term_save(&terms[cterm]);
  31         cterm = n;
  32         term_load(&terms[cterm]);
  33 }
  34
  35 static void directkey(void)
  36 {
  37         int c = readchar();
  38         if (c == ESC) {
  39                 switch ((c = readchar())) {
  40                 case 'c':
  41                         if (!term_fd())
  42                                 term_exec(SHELL);
  43                         return;
  44                 case 'j':
  45                 case 'k':
  46                         showterm((cterm + TAGS) % ARRAY_SIZE(terms));
  47                         return;
  48                 case 'o':
  49                         showterm(lterm);
  50                         return;
  51                 case CTRLKEY('q'):
  52                         exitit = 1;
  53                         return;
  54                 default:
  55                         term_send(ESC);
  56                 }
  57         }
  58         term_send(c);
  59 }
  60
  61 static void mainloop(void)
  62 {
  63         struct pollfd ufds[2];
  64         int rv;
  65         struct termios oldtermios, termios;
  66         tcgetattr(STDIN_FILENO, &termios);
  67         oldtermios = termios;
  68         cfmakeraw(&termios);
  69         tcsetattr(STDIN_FILENO, TCSAFLUSH, &termios);
  70         memset(ufds, 0, sizeof(ufds));
  71         ufds[0].fd = STDIN_FILENO;
  72         ufds[0].events = POLLIN;
  73         ufds[1].fd = term_fd();
  74         ufds[1].events = POLLIN;
  75         while (!exitit && (rv = poll(ufds, term_fd() ? 2 : 1, 1000)) != -1) {
  76                 if (ufds[0].revents & (POLLHUP | POLLERR | POLLNVAL))
  77                         break;
  78                 if (term_fd() && ufds[1].revents & (POLLHUP | POLLERR | POLLNVAL))
  79                         term_end();
  80                 if (term_fd() && ufds[1].revents & POLLIN)
  81                         term_read();
  82                 if (ufds[0].revents & POLLIN)
  83                         directkey();
  84                 ufds[1].fd = term_fd();
  85         }
  86         tcsetattr(STDIN_FILENO, 0, &oldtermios);
  87 }
  88
  89 int main(void)
  90 {
  91         char *hide = "\x1b[?25l";
  92         char *clear = "\x1b[2J\x1b[H";
  93         char *show = "\x1b[?25h";
  94         write(STDOUT_FILENO, hide, strlen(hide));
  95         write(STDOUT_FILENO, clear, strlen(clear));
  96         pad_init();
  97         pad_blank();
  98         mainloop();
  99         pad_free();
 100         write(STDOUT_FILENO, clear, strlen(clear));
 101         write(STDOUT_FILENO, show, strlen(show));
 102         return 0;
 103 }