diff options
Diffstat (limited to 'lib/interestingtimes.c')
| -rw-r--r-- | lib/interestingtimes.c | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/lib/interestingtimes.c b/lib/interestingtimes.c deleted file mode 100644 index a1aa2b67..00000000 --- a/lib/interestingtimes.c +++ /dev/null @@ -1,277 +0,0 @@ -/* interestingtimes.c - cursor control - * - * Copyright 2015 Rob Landley <rob@landley.net> - */ - -#include "toys.h" - -int tty_fd(void) -{ - int i, j; - - for (i = 0; i<3; i++) if (isatty(j = (i+1)%3)) return j; - - return notstdio(open("/dev/tty", O_RDWR)); -} - -// Quick and dirty query size of terminal, doesn't do ANSI probe fallback. -// set x=80 y=25 before calling to provide defaults. Returns 0 if couldn't -// determine size. - -int terminal_size(unsigned *xx, unsigned *yy) -{ - struct winsize ws; - unsigned i, x = 0, y = 0; - char *s; - - // stdin, stdout, stderr - for (i=0; i<3; i++) { - memset(&ws, 0, sizeof(ws)); - if (isatty(i) && !ioctl(i, TIOCGWINSZ, &ws)) { - if (ws.ws_col) x = ws.ws_col; - if (ws.ws_row) y = ws.ws_row; - - break; - } - } - s = getenv("COLUMNS"); - if (s) sscanf(s, "%u", &x); - s = getenv("LINES"); - if (s) sscanf(s, "%u", &y); - - // Never return 0 for either value, leave it at default instead. - if (xx && x) *xx = x; - if (yy && y) *yy = y; - - return x || y; -} - -// Query terminal size, sending ANSI probe if necesary. (Probe queries xterm -// size through serial connection, when local TTY doesn't know but remote does.) -// Returns 0 if ANSI probe sent, 1 if size determined from tty or environment - -int terminal_probesize(unsigned *xx, unsigned *yy) -{ - if (terminal_size(xx, yy) && (!xx || *xx) && (!yy || *yy)) return 1; - - // Send probe: bookmark cursor position, jump to bottom right, - // query position, return cursor to bookmarked position. - xprintf("\033[s\033[999C\033[999B\033[6n\033[u"); - - return 0; -} - -// Wrapper that parses results from ANSI probe to update screensize. -// Otherwise acts like scan_key() -int scan_key_getsize(char *scratch, int miliwait, unsigned *xx, unsigned *yy) -{ - int key; - - if (512&(key = scan_key(scratch, miliwait))) { - if (key>0) { - if (xx) *xx = (key>>10)&1023; - if (yy) *yy = (key>>20)&1023; - - return -3; - } - } - - return key; -} - -// Reset terminal to known state, saving copy of old state if old != NULL. -int set_terminal(int fd, int raw, int speed, struct termios *old) -{ - struct termios termio; - int i = tcgetattr(fd, &termio); - - // Fetch local copy of old terminfo, and copy struct contents to *old if set - if (i) return i; - if (old) *old = termio; - - // the following are the bits set for an xterm. Linux text mode TTYs by - // default add two additional bits that only matter for serial processing - // (turn serial line break into an interrupt, and XON/XOFF flow control) - - // Any key unblocks output, swap CR and NL on input - termio.c_iflag = IXANY|ICRNL|INLCR; - if (toys.which->flags & TOYFLAG_LOCALE) termio.c_iflag |= IUTF8; - - // Output appends CR to NL, does magic undocumented postprocessing - termio.c_oflag = ONLCR|OPOST; - - // Leave serial port speed alone - // termio.c_cflag = C_READ|CS8|EXTB; - - // Generate signals, input entire line at once, echo output - // erase, line kill, escape control characters with ^ - // erase line char at a time - // "extended" behavior: ctrl-V quotes next char, ctrl-R reprints unread chars, - // ctrl-W erases word - termio.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK|ECHOCTL|ECHOKE|IEXTEN; - - if (raw) cfmakeraw(&termio); - - if (speed) { - int i, speeds[] = {50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, - 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, - 500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000, - 2500000, 3000000, 3500000, 4000000}; - - // Find speed in table, adjust to constant - for (i = 0; i < ARRAY_LEN(speeds); i++) if (speeds[i] == speed) break; - if (i == ARRAY_LEN(speeds)) error_exit("unknown speed: %d", speed); - cfsetspeed(&termio, i+1+4081*(i>15)); - } - - return tcsetattr(fd, TCSAFLUSH, &termio); -} - -void xset_terminal(int fd, int raw, int speed, struct termios *old) -{ - if (-1 != set_terminal(fd, raw, speed, old)) return; - - sprintf(libbuf, "/proc/self/fd/%d", fd); - libbuf[readlink0(libbuf, libbuf, sizeof(libbuf))] = 0; - perror_exit("tcsetattr %s", libbuf); -} - -struct scan_key_list { - char *name, *seq; -} static const scan_key_list[] = TAGGED_ARRAY(KEY, - // up down right left pgup pgdn home end ins - {"UP", "\033[A"}, {"DOWN", "\033[B"}, {"RIGHT", "\033[C"}, {"LEFT", "\033[D"}, - {"PGUP", "\033[5~"}, {"PGDN", "\033[6~"}, {"HOME", "\033OH"}, - {"END", "\033OF"}, {"INSERT", "\033[2~"}, - - {"F1", "\033OP"}, {"F2", "\033OQ"}, {"F3", "\033OR"}, {"F4", "\033OS"}, - {"F5", "\033[15~"}, {"F6", "\033[17~"}, {"F7", "\033[18~"}, - {"F8", "\033[19~"}, {"F9", "\033[20~"}, - - {"SUP", "\033[1;2A"}, {"AUP", "\033[1;3A"}, {"CUP", "\033[1;5A"}, - {"SDOWN", "\033[1;2B"}, {"ADOWN", "\033[1;3B"}, {"CDOWN", "\033[1;5B"}, - {"SRIGHT", "\033[1;2C"}, {"ARIGHT", "\033[1;3C"}, {"CRIGHT", "\033[1;5C"}, - {"SLEFT", "\033[1;2D"}, {"ALEFT", "\033[1;3D"}, {"CLEFT", "\033[1;5D"}, - - {"SF1", "\033O1;2P"}, {"AF1", "\033O1;3P"}, {"CF1", "\033[1;5P"} -); - -// Scan stdin for a keypress, parsing known escape sequences -// Blocks for miliwait miliseconds, none 0, forever if -1 -// Returns: 0-255=literal, -1=EOF, -2=TIMEOUT, 256-...=index into scan_key_list -// >512 is x<<9+y<<21 -// scratch space is necessary because last char of !seq could start new seq -// Zero out first byte of scratch before first call to scan_key -// block=0 allows fetching multiple characters before updating display -int scan_key(char *scratch, int miliwait) -{ - struct pollfd pfd; - int maybe, i, j; - char *test; - - for (;;) { - pfd.fd = 0; - pfd.events = POLLIN; - pfd.revents = 0; - - maybe = 0; - if (*scratch) { - int pos[6]; - unsigned x, y; - - // Check for return from terminal size probe - memset(pos, 0, 6*sizeof(int)); - scratch[(1+*scratch)&15] = 0; - sscanf(scratch+1, "\033%n[%n%3u%n;%n%3u%nR%n", pos, pos+1, &y, - pos+2, pos+3, &x, pos+4, pos+5); - if (pos[5]) { - // Recognized X/Y position, consume and return - *scratch = 0; - return 512+(x<<10)+(y<<20); - } else for (i=0; i<6; i++) if (pos[i]==*scratch) maybe = 1; - - // Check sequences - for (i = 0; i<ARRAY_LEN(scan_key_list); i++) { - test = scan_key_list[i].seq; - for (j = 0; j<*scratch; j++) if (scratch[j+1] != test[j]) break; - if (j == *scratch) { - maybe = 1; - if (!test[j]) { - // We recognized current sequence: consume and return - *scratch = 0; - return 256+i; - } - } - } - - // If current data can't be a known sequence, return next raw char - if (!maybe) break; - } - - // Need more data to decide - - // 30 miliseconds is about the gap between characters at 300 baud - if (maybe || miliwait != -1) - if (!xpoll(&pfd, 1, maybe ? 30 : miliwait)) break; - - // Read 1 byte so we don't overshoot sequence match. (We can deviate - // and fail to match, but match consumes entire buffer.) - if (toys.signal>0 || 1 != read(0, scratch+1+*scratch, 1)) - return (toys.signal>0) ? -3 : -1; - ++*scratch; - } - - // Was not a sequence - if (!*scratch) return -2; - i = scratch[1]; - if (--*scratch) memmove(scratch+1, scratch+2, *scratch); - - return i; -} - -void tty_esc(char *s) -{ - printf("\033[%s", s); -} - -void tty_jump(int x, int y) -{ - char s[32]; - - sprintf(s, "%d;%dH", y+1, x+1); - tty_esc(s); -} - -void tty_reset(void) -{ - set_terminal(0, 0, 0, 0); - tty_esc("?25h"); - tty_esc("0m"); - tty_jump(0, 999); - tty_esc("K"); - fflush(0); -} - -// If you call set_terminal(), use sigatexit(tty_sigreset); -void tty_sigreset(int i) -{ - tty_reset(); - _exit(i ? 128+i : 0); -} - -void start_redraw(unsigned *width, unsigned *height) -{ - // If never signaled, do raw mode setup. - if (!toys.signal) { - *width = 80; - *height = 25; - set_terminal(0, 1, 0, 0); - sigatexit(tty_sigreset); - xsignal(SIGWINCH, generic_signal); - } - if (toys.signal != -1) { - toys.signal = -1; - terminal_probesize(width, height); - } - xprintf("\033[H\033[J"); -} |