.tmux-layout

|/|
0> vim
2> cd client && yarn start
3> cd server && yarn start
0

tmux-layout.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <string.h>
#include <unistd.h>

char *dev;
int tty_fd;

static inline void send_tty(char *ch) {
  ioctl(tty_fd, TIOCSTI, ch);
}

void echo_tty(char *cmd) {
  usleep(225000);
  for (int i = 0; cmd[i]; ++i) {
    send_tty(cmd + i);
  }
}

void open_tty() {
  tty_fd = open(dev, O_RDWR);
  if(tty_fd == -1) {
    perror("open DEVICE");
    exit(1);
  }
}

void start_tmux() {
  echo_tty("tmux\n");
}

void process_command(char *code) {
  int i, raw_mode = 0, is_comment = 0;
  char *n = calloc(1, sizeof(char));

  if(fork() != 0)
    return;

  open_tty();
  start_tmux();

  for (i = 0; code[i]; ++i) {
    if (is_comment) {
      if (code[i] == '\n') {
        is_comment = 0;
      }
      continue;
    }
    if (raw_mode) {
      if (code[i] == '\n' && code[i - 1] != '\\') {
        raw_mode = 0;
      }
      send_tty(code + i);
      continue;
    }
    switch (code[i]) {
      case '|':
        // Vertical Split
        echo_tty("\x02%");
        break;
      case '/':
        // Horizontal Split
        echo_tty("\x02\"");
        break;
      case 't':
        // Show a timer
        echo_tty("\x02t");
        break;
      case 'l':
        // Arrow Left
        echo_tty("\x02\x1B\x5B\x44\x02");
        usleep(300000);
        break;
      case 'r':
        // Arrow right
        echo_tty("\x02\x1B\x5B\x43\x02");
        usleep(300000);
        break;
      case 'u':
        // Arrow up
        echo_tty("\x02\x1B\x5B\x41\x02");
        usleep(300000);
        break;
      case 'd':
        // Arrow down
        echo_tty("\x02\x1B\x5B\x42\x02");
        usleep(300000);
        break;
      case '>':
        raw_mode = 1;
        break;
      case '#':
        is_comment = 1;
        break;
    }
    if ('0' <= code[i] && code[i] <= '9') {
      n[0] = code[i];
      echo_tty("\x02q");
      echo_tty(n);
      usleep(300000);
    }
  }

  free(n);
  close(tty_fd);
}

void process_file(char *file_name) {
  FILE *fd = fopen(file_name, "rb");
  if (!fd) {
    perror("fopen");
    exit(-1);
  }

  fseek(fd, 0, SEEK_END);
  long fsize = ftell(fd);
  fseek(fd, 0, SEEK_SET);

  char *code = malloc(fsize + 1);
  fread(code, fsize, 1, fd);
  fclose(fd);
  code[fsize] = 0;

  process_command(code);
}

int main (int argc, char *argv[]) {
  dev = getenv("TTY");
  if (dev == NULL) {
    dev = ttyname(STDIN_FILENO);
  }

  if (argc == 2) {
    process_file(argv[1]);
  } else if (argc == 3 && !strcmp(argv[1], "-e")) {
    process_command(argv[2]);
  } else if (access(".tmux-layout", F_OK) != -1) {
    process_file(".tmux-layout");
  } else {
    puts("No .tmux-layout file found in this directory.");
    puts("Use:");
    puts("tmux-layout [FILE]");
    puts("tmux-layout -e [CMD]");
    exit(1);
  }

  return 0;
}