mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
378 lines
9.0 KiB
V
378 lines
9.0 KiB
V
module ui
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import os
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import time
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <signal.h>
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fn C.tcgetattr()
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fn C.tcsetattr()
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fn C.ioctl(fd int, request u64, arg voidptr) int
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struct C.termios {
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mut:
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c_iflag u32
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c_lflag u32
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c_cc [32]byte
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}
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struct C.winsize {
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ws_row u16
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ws_col u16
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}
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const (
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termios_at_startup = get_termios()
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)
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[inline]
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fn get_termios() C.termios {
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mut t := C.termios{}
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C.tcgetattr(C.STDIN_FILENO, &t)
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return t
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}
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[inline]
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fn get_terminal_size() (u16, u16) {
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winsz := C.winsize{}
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C.ioctl(0, C.TIOCGWINSZ, &winsz)
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return winsz.ws_row, winsz.ws_col
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}
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fn (mut ctx Context) termios_setup() {
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mut termios := get_termios()
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if ctx.cfg.capture_events {
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// Set raw input mode by unsetting ICANON and ECHO,
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// as well as disable e.g. ctrl+c and ctrl.z
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termios.c_iflag &= ~u32(C.IGNBRK | C.BRKINT | C.PARMRK | C.IXON)
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termios.c_lflag &= ~u32(C.ICANON | C.ISIG | C.ECHO | C.IEXTEN | C.TOSTOP)
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} else {
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// Set raw input mode by unsetting ICANON and ECHO
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termios.c_lflag &= ~u32(C.ICANON | C.ECHO)
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}
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// Prevent stdin from blocking by making its read time 0
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termios.c_cc[C.VTIME] = 0
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termios.c_cc[C.VMIN] = 0
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C.tcsetattr(C.STDIN_FILENO, C.TCSAFLUSH, &termios)
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print('\x1b[?1003h\x1b[?1015h\x1b[?1006h')
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ctx.termios = termios
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ctx.window_height, ctx.window_width = get_terminal_size()
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// Reset console on exit
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C.atexit(termios_reset)
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for code in ctx.cfg.reset {
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os.signal(code, fn() {
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mut c := ctx_ptr
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if c != 0 {
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c.cleanup()
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}
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exit(0)
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})
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}
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os.signal(C.SIGWINCH, fn() {
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mut c := ctx_ptr
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if c != 0 {
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c.window_height, c.window_width = get_terminal_size()
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mut event := &Event{
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typ: .resized
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width: c.window_width
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height: c.window_height
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}
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c.event(event)
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}
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})
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}
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fn termios_reset() {
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C.tcsetattr(C.STDIN_FILENO, C.TCSAFLUSH /* C.TCSANOW ?? */, &termios_at_startup)
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print('\x1b[?1003l\x1b[?1015l\x1b[?1006l\x1b[0J\x1b[?25h')
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}
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///////////////////////////////////////////
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/*
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fn (mut ctx Context) termios_loop() {
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frame_time := 1_000_000 / ctx.cfg.frame_rate
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mut init_called := false
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mut sw := time.new_stopwatch(auto_start: false)
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mut last_frame_time := 0
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mut sleep_len := 0
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for {
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sw.restart()
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if !init_called {
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ctx.init()
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init_called = true
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}
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for _ in 0 .. 7 {
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// println('SLEEPING: $sleep_len')
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if sleep_len > 0 {
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time.usleep(sleep_len)
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}
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if ctx.cfg.event_fn != voidptr(0) {
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len := C.read(C.STDIN_FILENO, ctx.read_buf.data, ctx.read_buf.cap - ctx.read_buf.len)
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if len > 0 {
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ctx.resize_arr(len)
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ctx.parse_events()
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}
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}
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}
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ctx.frame()
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sw.pause()
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last_frame_time = int(sw.elapsed().microseconds())
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if
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println('Sleeping for $frame_time - $last_frame_time = ${frame_time - last_frame_time}')
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// time.usleep(frame_time - last_frame_time - sleep_len * 7)
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last_frame_time = 0
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sw.start()
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sw.pause()
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last_frame_time += int(sw.elapsed().microseconds())
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sleep_len = (frame_time - last_frame_time) / 8
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ctx.frame_count++
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}
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}
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*/
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// TODO: do multiple sleep/read cycles, rather than one big one
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fn (mut ctx Context) termios_loop() {
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frame_time := 1_000_000 / ctx.cfg.frame_rate
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mut init_called := false
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mut sw := time.new_stopwatch(auto_start: false)
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mut sleep_len := 0
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for {
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if !init_called {
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ctx.init()
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init_called = true
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}
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// println('SLEEPING: $sleep_len')
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if sleep_len > 0 {
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time.usleep(sleep_len)
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}
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sw.restart()
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if ctx.cfg.event_fn != voidptr(0) {
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len := C.read(C.STDIN_FILENO, ctx.read_buf.data, ctx.read_buf.cap - ctx.read_buf.len)
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if len > 0 {
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ctx.resize_arr(len)
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ctx.parse_events()
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}
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}
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ctx.frame()
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sw.pause()
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e := sw.elapsed().microseconds()
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sleep_len = frame_time - int(e)
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ctx.frame_count++
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}
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}
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fn (mut ctx Context) parse_events() {
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// Stop this from getting stuck in rare cases where something isn't parsed correctly
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mut nr_iters := 0
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for ctx.read_buf.len > 0 {
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nr_iters++
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if nr_iters > 100 { ctx.shift(1) }
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mut event := &Event(0)
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if ctx.read_buf[0] == 0x1b {
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e, len := escape_sequence(ctx.read_buf.bytestr())
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event = e
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ctx.shift(len)
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} else {
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event = single_char(ctx.read_buf.bytestr())
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ctx.shift(1)
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}
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if event != 0 {
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ctx.event(event)
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nr_iters = 0
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}
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}
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}
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fn single_char(buf string) &Event {
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ch := buf[0]
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mut event := &Event{
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typ: .key_down
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ascii: ch
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code: KeyCode(ch)
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utf8: buf
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}
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match ch {
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// special handling for `ctrl + letter`
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// TODO: Fix assoc in V and remove this workaround :/
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// 1 ... 26 { event = { event | code: KeyCode(96 | ch), modifiers: ctrl } }
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// 65 ... 90 { event = { event | code: KeyCode(32 | ch), modifiers: shift } }
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// The bit `or`s here are really just `+`'s, just written in this way for a tiny performance improvement
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// 10 == `\n` == enter, don't treat it as ctrl + j
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1 ... 9, 11 ... 26 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(96 | ch), modifiers: ctrl } }
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65 ... 90 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(32 | ch), modifiers: shift } }
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else {}
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}
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return event
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}
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[inline]
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// Gets an entire, independent escape sequence from the buffer
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// Normally, this just means reading until the first letter, but there are some exceptions...
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fn escape_end(buf string) int {
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mut i := 0
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for {
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if i + 1 == buf.len { return buf.len }
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if buf[i].is_letter() {
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if buf[i] == `O` && i + 2 <= buf.len {
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n := buf[i+1]
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if (n >= `A` && n <= `D`) || (n >= `P` && n <= `S`) || n == `F` || n == `H` {
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return i + 2
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}
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}
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return i + 1
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}
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i++
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}
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// this point should be unreachable
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assert false
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return 0
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}
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fn escape_sequence(buf_ string) (&Event, int) {
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end := escape_end(buf_)
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single := buf_[..end] // read until the end of the sequence
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buf := single[1..] // skip the escape character
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if buf.len == 0 {
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return &Event{
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typ: .key_down
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ascii: 27
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code: .escape
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utf8: single
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}, 1
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}
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if buf.len == 1 {
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c := single_char(buf)
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// return { c | modifiers: c.modifiers | alt }, 2
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return &Event{
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typ: c.typ
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ascii: c.ascii
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code: c.code
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utf8: single
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modifiers: c.modifiers | alt
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}, 2
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}
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// ----------------
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// Mouse events
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// ----------------
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if buf.len > 2 && buf[1] == `<` { // Mouse control
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split := buf[2..].split(';')
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if split.len < 3 { return &Event(0), 0 }
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typ, x, y := split[0].int(), split[1].int(), split[2].int()
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match typ {
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0, 2 {
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last := buf[buf.len - 1]
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button := if typ == 0 { MouseButton.primary } else { MouseButton.secondary }
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event := if last == `M` { EventType.mouse_down } else { EventType.mouse_up }
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return &Event{ typ: event, x: x, y: y, button: button, utf8: single }, end
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}
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32, 34 {
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button := if typ == 32 { MouseButton.primary } else { MouseButton.secondary }
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return &Event{ typ: .mouse_drag, x: x, y: y, button: button, utf8: single }, end
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}
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35 {
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return &Event{ typ: .mouse_move, x: x, y: y, utf8: single }, end
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}
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64, 65 {
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direction := if typ == 64 { Direction.down } else { Direction.up }
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return &Event{ typ: .mouse_scroll, x: x, y: y, direction: direction, utf8: single }, end
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} else {}
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}
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}
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// ----------------------------
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// Special key combinations
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// ----------------------------
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mut code := KeyCode.null
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mut modifiers := u32(0)
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match buf {
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'[A', 'OA' { code = .up }
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'[B', 'OB' { code = .down }
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'[C', 'OC' { code = .right }
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'[D', 'OD' { code = .left }
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'[5~', '[[5~' { code = .page_up }
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'[6~', '[[6~' { code = .page_down }
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'[F', 'OF', '[4~', '[[8~' { code = .end }
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'[H', 'OH', '[1~', '[[7~' { code = .home }
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'[2~' { code = .insert }
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'[3~' { code = .delete }
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'OP', '[11~' { code = .f1 }
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'OQ', '[12~' { code = .f2 }
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'OR', '[13~' { code = .f3 }
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'OS', '[14~' { code = .f4 }
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'[15~' { code = .f5 }
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'[17~' { code = .f6 }
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'[18~' { code = .f7 }
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'[19~' { code = .f8 }
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'[20~' { code = .f9 }
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'[21~' { code = .f10 }
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'[23~' { code = .f11 }
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'[24~' { code = .f12 }
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else {}
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}
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if buf.len == 5 && buf[0] == `[` && buf[1] == `1` && buf[2] == `;` {
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// code = KeyCode(buf[4] + 197)
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modifiers = match buf[3] {
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`2` { shift }
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`3` { alt }
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`4` { shift | alt }
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`5` { ctrl }
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`6` { ctrl | shift }
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`7` { ctrl | alt }
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`8` { ctrl | alt | shift }
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else { modifiers } // probably unreachable? idk, terminal events are strange
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}
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code = match buf[4] {
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`A` { KeyCode.up }
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`B` { KeyCode.down }
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`C` { KeyCode.right }
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`D` { KeyCode.left }
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`F` { KeyCode.end }
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`H` { KeyCode.home }
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`P` { KeyCode.f1 }
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`Q` { KeyCode.f2 }
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`R` { KeyCode.f3 }
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`S` { KeyCode.f4 }
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else { code }
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}
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// && buf[3] >= `2` && buf[3] <= `8` && buf[4] >= `A` && buf[4] <= `D`
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}
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return &Event{ typ: .key_down, code: code, utf8: single, modifiers: modifiers }, end
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}
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