382 lines
9.2 KiB
V
382 lines
9.2 KiB
V
module ui
|
|
|
|
import os
|
|
import time
|
|
|
|
#include <termios.h>
|
|
#include <sys/ioctl.h>
|
|
#include <signal.h>
|
|
|
|
fn C.tcgetattr()
|
|
fn C.tcsetattr()
|
|
fn C.ioctl(fd int, request u64, arg voidptr) int
|
|
|
|
struct C.termios {
|
|
mut:
|
|
c_iflag u32
|
|
c_lflag u32
|
|
c_cc [32]byte
|
|
}
|
|
|
|
struct C.winsize {
|
|
ws_row u16
|
|
ws_col u16
|
|
}
|
|
|
|
const (
|
|
termios_at_startup = get_termios()
|
|
)
|
|
|
|
[inline]
|
|
fn get_termios() C.termios {
|
|
mut t := C.termios{}
|
|
C.tcgetattr(C.STDIN_FILENO, &t)
|
|
return t
|
|
}
|
|
|
|
[inline]
|
|
fn get_terminal_size() (u16, u16) {
|
|
winsz := C.winsize{}
|
|
C.ioctl(0, C.TIOCGWINSZ, &winsz)
|
|
return winsz.ws_row, winsz.ws_col
|
|
}
|
|
|
|
fn restore_terminal_state() {
|
|
termios_reset()
|
|
mut c := ctx_ptr
|
|
if c != 0 {
|
|
c.load_title()
|
|
}
|
|
println('')
|
|
}
|
|
|
|
fn (mut ctx Context) termios_setup() {
|
|
// store the current title, so restore_terminal_state can get it back
|
|
ctx.save_title()
|
|
|
|
mut termios := get_termios()
|
|
|
|
if ctx.cfg.capture_events {
|
|
// Set raw input mode by unsetting ICANON and ECHO,
|
|
// as well as disable e.g. ctrl+c and ctrl.z
|
|
termios.c_iflag &= ~u32(C.IGNBRK | C.BRKINT | C.PARMRK | C.IXON)
|
|
termios.c_lflag &= ~u32(C.ICANON | C.ISIG | C.ECHO | C.IEXTEN | C.TOSTOP)
|
|
} else {
|
|
// Set raw input mode by unsetting ICANON and ECHO
|
|
termios.c_lflag &= ~u32(C.ICANON | C.ECHO)
|
|
}
|
|
|
|
if ctx.cfg.hide_cursor {
|
|
print('\x1b[?25l')
|
|
}
|
|
|
|
if ctx.cfg.window_title != '' {
|
|
print('\x1b]0;$ctx.cfg.window_title\x07')
|
|
}
|
|
|
|
// Prevent stdin from blocking by making its read time 0
|
|
termios.c_cc[C.VTIME] = 0
|
|
termios.c_cc[C.VMIN] = 0
|
|
C.tcsetattr(C.STDIN_FILENO, C.TCSAFLUSH, &termios)
|
|
print('\x1b[?1003h\x1b[?1006h')
|
|
|
|
ctx.termios = termios
|
|
|
|
ctx.window_height, ctx.window_width = get_terminal_size()
|
|
|
|
// Reset console on exit
|
|
C.atexit(restore_terminal_state)
|
|
os.signal(C.SIGTSTP, restore_terminal_state)
|
|
os.signal(C.SIGCONT, fn () {
|
|
mut c := ctx_ptr
|
|
if c != 0 {
|
|
c.termios_setup()
|
|
c.window_height, c.window_width = get_terminal_size()
|
|
mut event := &Event{
|
|
typ: .resized
|
|
width: c.window_width
|
|
height: c.window_height
|
|
}
|
|
c.event(event)
|
|
}
|
|
})
|
|
for code in ctx.cfg.reset {
|
|
os.signal(code, fn() {
|
|
mut c := ctx_ptr
|
|
if c != 0 {
|
|
c.cleanup()
|
|
}
|
|
exit(0)
|
|
})
|
|
}
|
|
|
|
os.signal(C.SIGWINCH, fn() {
|
|
mut c := ctx_ptr
|
|
if c != 0 {
|
|
c.window_height, c.window_width = get_terminal_size()
|
|
|
|
mut event := &Event{
|
|
typ: .resized
|
|
width: c.window_width
|
|
height: c.window_height
|
|
}
|
|
c.event(event)
|
|
}
|
|
})
|
|
}
|
|
|
|
fn termios_reset() {
|
|
C.tcsetattr(C.STDIN_FILENO, C.TCSAFLUSH /* C.TCSANOW ?? */, &termios_at_startup)
|
|
print('\x1b[?1003l\x1b[?1015l\x1b[?1006l\x1b[0J\x1b[?25h')
|
|
}
|
|
|
|
///////////////////////////////////////////
|
|
|
|
// TODO: do multiple sleep/read cycles, rather than one big one
|
|
fn (mut ctx Context) termios_loop() {
|
|
frame_time := 1_000_000 / ctx.cfg.frame_rate
|
|
mut init_called := false
|
|
mut sw := time.new_stopwatch(auto_start: false)
|
|
mut sleep_len := 0
|
|
for {
|
|
if !init_called {
|
|
ctx.init()
|
|
init_called = true
|
|
}
|
|
// println('SLEEPING: $sleep_len')
|
|
if sleep_len > 0 {
|
|
time.usleep(sleep_len)
|
|
}
|
|
sw.restart()
|
|
if ctx.cfg.event_fn != voidptr(0) {
|
|
len := C.read(C.STDIN_FILENO, ctx.read_buf.data, ctx.read_buf.cap - ctx.read_buf.len)
|
|
if len > 0 {
|
|
ctx.resize_arr(len)
|
|
ctx.parse_events()
|
|
}
|
|
}
|
|
ctx.frame()
|
|
sw.pause()
|
|
e := sw.elapsed().microseconds()
|
|
sleep_len = frame_time - int(e)
|
|
|
|
ctx.frame_count++
|
|
}
|
|
}
|
|
|
|
fn (mut ctx Context) parse_events() {
|
|
// Stop this from getting stuck in rare cases where something isn't parsed correctly
|
|
mut nr_iters := 0
|
|
for ctx.read_buf.len > 0 {
|
|
nr_iters++
|
|
if nr_iters > 100 { ctx.shift(1) }
|
|
mut event := &Event(0)
|
|
if ctx.read_buf[0] == 0x1b {
|
|
e, len := escape_sequence(ctx.read_buf.bytestr())
|
|
event = e
|
|
ctx.shift(len)
|
|
} else {
|
|
event = single_char(ctx.read_buf.bytestr())
|
|
ctx.shift(1)
|
|
}
|
|
if event != 0 {
|
|
ctx.event(event)
|
|
nr_iters = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
fn single_char(buf string) &Event {
|
|
ch := buf[0]
|
|
|
|
mut event := &Event{
|
|
typ: .key_down
|
|
ascii: ch
|
|
code: KeyCode(ch)
|
|
utf8: buf
|
|
}
|
|
|
|
match ch {
|
|
// special handling for `ctrl + letter`
|
|
|
|
// TODO: Fix assoc in V and remove this workaround :/
|
|
// 1 ... 26 { event = { event | code: KeyCode(96 | ch), modifiers: ctrl } }
|
|
// 65 ... 90 { event = { event | code: KeyCode(32 | ch), modifiers: shift } }
|
|
|
|
|
|
// The bit `or`s here are really just `+`'s, just written in this way for a tiny performance improvement
|
|
// 10 == `\n` == enter, don't treat it as ctrl + j
|
|
1 ... 9, 11 ... 26 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(96 | ch), modifiers: ctrl } }
|
|
65 ... 90 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(32 | ch), modifiers: shift } }
|
|
|
|
else {}
|
|
}
|
|
|
|
return event
|
|
}
|
|
|
|
[inline]
|
|
// Gets an entire, independent escape sequence from the buffer
|
|
// Normally, this just means reading until the first letter, but there are some exceptions...
|
|
fn escape_end(buf string) int {
|
|
mut i := 0
|
|
for {
|
|
if i + 1 == buf.len { return buf.len }
|
|
|
|
if buf[i].is_letter() || buf[i] == `~` {
|
|
if buf[i] == `O` && i + 2 <= buf.len {
|
|
n := buf[i+1]
|
|
if (n >= `A` && n <= `D`) || (n >= `P` && n <= `S`) || n == `F` || n == `H` {
|
|
return i + 2
|
|
}
|
|
}
|
|
return i + 1
|
|
// escape hatch to avoid potential issues/crashes, although ideally this should never eval to true
|
|
} else if buf[i + 1] == 0x1b { return i + 1 }
|
|
i++
|
|
}
|
|
// this point should be unreachable
|
|
assert false
|
|
return 0
|
|
}
|
|
|
|
fn escape_sequence(buf_ string) (&Event, int) {
|
|
end := escape_end(buf_)
|
|
single := buf_[..end] // read until the end of the sequence
|
|
buf := single[1..] // skip the escape character
|
|
|
|
if buf.len == 0 {
|
|
return &Event{
|
|
typ: .key_down
|
|
ascii: 27
|
|
code: .escape
|
|
utf8: single
|
|
}, 1
|
|
}
|
|
|
|
if buf.len == 1 {
|
|
c := single_char(buf)
|
|
// return { c | modifiers: c.modifiers | alt }, 2
|
|
|
|
return &Event{
|
|
typ: c.typ
|
|
ascii: c.ascii
|
|
code: c.code
|
|
utf8: single
|
|
modifiers: c.modifiers | alt
|
|
}, 2
|
|
}
|
|
|
|
// ----------------
|
|
// Mouse events
|
|
// ----------------
|
|
|
|
// Documentation: https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h2-Mouse-Tracking
|
|
if buf.len > 2 && buf[1] == `<` {
|
|
split := buf[2..].split(';')
|
|
if split.len < 3 { return &Event(0), 0 }
|
|
|
|
typ, x, y := split[0].int(), split[1].int(), split[2].int()
|
|
lo := typ & 0b00011
|
|
hi := typ & 0b11100
|
|
|
|
mut modifiers := u32(0)
|
|
if hi & 4 != 0 { modifiers |= shift }
|
|
if hi & 8 != 0 { modifiers |= alt }
|
|
if hi & 16 != 0 { modifiers |= ctrl }
|
|
|
|
match typ {
|
|
0...31 {
|
|
last := buf[buf.len - 1]
|
|
button := if lo < 3 { MouseButton(lo + 1) } else { MouseButton.unknown }
|
|
event := if last == `m` || lo == 3 { EventType.mouse_up } else { EventType.mouse_down }
|
|
|
|
return &Event{ typ: event, x: x, y: y, button: button, modifiers: modifiers utf8: single }, end
|
|
}
|
|
32...63 {
|
|
button, event := if lo < 3 {
|
|
MouseButton(lo + 1), EventType.mouse_drag
|
|
} else {
|
|
MouseButton.unknown, EventType.mouse_move
|
|
}
|
|
|
|
return &Event{ typ: event, x: x, y: y, button: button, modifiers: modifiers, utf8: single }, end
|
|
}
|
|
64...95 {
|
|
direction := if typ & 1 == 0 { Direction.down } else { Direction.up }
|
|
return &Event{ typ: .mouse_scroll, x: x, y: y, direction: direction, modifiers: modifiers, utf8: single }, end
|
|
} else {
|
|
return &Event{ typ: .unknown, utf8: single }, end
|
|
}
|
|
}
|
|
}
|
|
|
|
// ----------------------------
|
|
// Special key combinations
|
|
// ----------------------------
|
|
|
|
mut code := KeyCode.null
|
|
mut modifiers := u32(0)
|
|
match buf {
|
|
'[A', 'OA' { code = .up }
|
|
'[B', 'OB' { code = .down }
|
|
'[C', 'OC' { code = .right }
|
|
'[D', 'OD' { code = .left }
|
|
'[5~', '[[5~' { code = .page_up }
|
|
'[6~', '[[6~' { code = .page_down }
|
|
'[F', 'OF', '[4~', '[[8~' { code = .end }
|
|
'[H', 'OH', '[1~', '[[7~' { code = .home }
|
|
'[2~' { code = .insert }
|
|
'[3~' { code = .delete }
|
|
'OP', '[11~' { code = .f1 }
|
|
'OQ', '[12~' { code = .f2 }
|
|
'OR', '[13~' { code = .f3 }
|
|
'OS', '[14~' { code = .f4 }
|
|
'[15~' { code = .f5 }
|
|
'[17~' { code = .f6 }
|
|
'[18~' { code = .f7 }
|
|
'[19~' { code = .f8 }
|
|
'[20~' { code = .f9 }
|
|
'[21~' { code = .f10 }
|
|
'[23~' { code = .f11 }
|
|
'[24~' { code = .f12 }
|
|
else {}
|
|
}
|
|
|
|
if buf.len == 5 && buf[0] == `[` && buf[1].is_digit() && buf[2] == `;` {
|
|
// code = KeyCode(buf[4] + 197)
|
|
modifiers = match buf[3] {
|
|
`2` { shift }
|
|
`3` { alt }
|
|
`4` { shift | alt }
|
|
`5` { ctrl }
|
|
`6` { ctrl | shift }
|
|
`7` { ctrl | alt }
|
|
`8` { ctrl | alt | shift }
|
|
else { modifiers } // probably unreachable? idk, terminal events are strange
|
|
}
|
|
|
|
if buf[1] == `1` {
|
|
code = match buf[4] {
|
|
`A` { KeyCode.up }
|
|
`B` { KeyCode.down }
|
|
`C` { KeyCode.right }
|
|
`D` { KeyCode.left }
|
|
`F` { KeyCode.end }
|
|
`H` { KeyCode.home }
|
|
`P` { KeyCode.f1 }
|
|
`Q` { KeyCode.f2 }
|
|
`R` { KeyCode.f3 }
|
|
`S` { KeyCode.f4 }
|
|
else { code }
|
|
}
|
|
} else if buf[1] == `5` {
|
|
code = KeyCode.page_up
|
|
} else if buf[1] == `6` {
|
|
code = KeyCode.page_down
|
|
}
|
|
}
|
|
|
|
return &Event{ typ: .key_down, code: code, utf8: single, modifiers: modifiers }, end
|
|
}
|