102 lines
1.9 KiB
V
102 lines
1.9 KiB
V
module term
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import os
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#include <sys/ioctl.h>
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#include <termios.h> // TIOCGWINSZ
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pub struct C.winsize {
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pub:
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ws_row u16
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ws_col u16
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ws_xpixel u16
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ws_ypixel u16
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}
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fn C.ioctl(fd int, request u64, arg voidptr) int
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// get_terminal_size returns a number of colums and rows of terminal window.
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pub fn get_terminal_size() (int, int) {
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if is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
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return default_columns_size, default_rows_size
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}
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w := C.winsize{}
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C.ioctl(1, C.TIOCGWINSZ, &w)
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return int(w.ws_col), int(w.ws_row)
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}
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// get_cursor_position returns a Coord containing the current cursor position
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pub fn get_cursor_position() Coord {
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if is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
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return Coord{
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x: 0
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y: 0
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}
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}
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// TODO: use termios.h, C.tcgetattr & C.tcsetattr directly,
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// instead of using `stty`
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oldsettings := os.exec('stty -g') or {
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os.Result{}
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}
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os.system('stty -echo -icanon time 0')
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print('\033[6n')
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mut ch := int(0)
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mut i := 0
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// ESC [ YYY `;` XXX `R`
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mut reading_x := false
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mut reading_y := false
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mut x := 0
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mut y := 0
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for {
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ch = C.getchar()
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b := byte(ch)
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i++
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if i >= 15 {
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panic('C.getchar() called too many times')
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}
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// state management:
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if b == `R` {
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break
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}
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if b == `[` {
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reading_y = true
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reading_x = false
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continue
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}
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if b == `;` {
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reading_y = false
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reading_x = true
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continue
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}
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// converting string vals to ints:
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if reading_x {
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x *= 10
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x += (b - byte(`0`))
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}
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if reading_y {
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y *= 10
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y += (b - byte(`0`))
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}
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}
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// restore the old terminal settings:
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os.system('stty $oldsettings.output')
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return Coord{
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x: x
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y: y
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}
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}
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// set_terminal_title change the terminal title
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pub fn set_terminal_title(title string) bool {
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if is_atty(1) <= 0 || os.getenv('TERM') == 'dumb' {
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return true
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}
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print('\033]0;${title}\007')
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return true
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}
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// clear clears current terminal screen.
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pub fn clear() {
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print('\x1b[2J')
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print('\x1b[H')
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}
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