term.ui: simplify/fix the truecolor feature test (#6963)
parent
ea8adfdbf9
commit
6563535a3d
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@ -164,88 +164,30 @@ fn (mut ctx Context) termios_setup() ? {
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fn get_cursor_position() (int, int) {
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print('\033[6n')
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// ESC [ YYY `;` XXX `R`
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mut reading_x, mut reading_y := false, false
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mut x, mut y := 0, 0
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for i := 0; i < 15 ; i++ {
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ch := int(C.getchar())
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b := byte(ch)
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i++
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// state management:
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if b == `R` {
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break
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} else 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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} else 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 = x * 10 + b - byte(`0`)
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} else if reading_y {
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y = y * 10 + b - byte(`0`)
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}
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}
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return x, y
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buf := malloc(25)
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len := C.read(C.STDIN_FILENO, buf, 24)
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unsafe { buf[len] = 0 }
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s := tos(buf, len)
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a := s[2..].split(';')
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if a.len != 2 { return -1, -1 }
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return a[0].int(), a[1].int()
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}
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fn supports_truecolor() bool {
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// faster/simpler, but less reliable, check
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if os.getenv('COLORTERM') in ['truecolor', '24bit'] {
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return true
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}
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// set the bg color to some arbirtrary value (#010203), assumed not to be the default
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print('\x1b[48:2:1:2:3m')
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sx, sy := get_cursor_position()
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// sequence to query the current cursor position
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// andquery the current color
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print('\x1bP\$qm\x1b\\')
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color := get_current_bg_color()
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ex, ey := get_cursor_position()
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// if the terminal doesn't understand the "get current color",
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// assume it doesn't support truecolor either
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if !(sx == ex && sy == ey) {
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println('>>> different pos: ($sx, $sy) -> ($ex, $ey)')
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return false
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}
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// TODO: iTerm emits a different sequence, but it's compatible anyways, so
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if color !in [0x010203, 0x01010203] {
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println('>>> no match: $color')
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return false
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}
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return true
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}
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buf := malloc(25)
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len := C.read(C.STDIN_FILENO, buf, 24)
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unsafe { buf[len] = 0 }
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s := tos(buf, len)
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return '1:2:3' in s
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fn get_current_bg_color() int {
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mut res := 0
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mut colon_cnt := 0
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mut cur_val := 0
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for i := 0; i < 50 ; i++ {
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ch := int(C.getchar())
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b := byte(ch)
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if b in [0, 255] {
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return -1
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} else if b == `m` {
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if colon_cnt > 1 {
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res = (res << 8) | cur_val
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cur_val = 0
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}
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break
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} else if b in [`:`, `;`] {
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if colon_cnt > 1 {
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res = (res << 8) | cur_val
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cur_val = 0
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}
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colon_cnt++
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} else if b.is_digit() {
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if colon_cnt > 1 {
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cur_val = cur_val * 10 + b - byte(`0`)
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}
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}
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}
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return res
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}
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fn termios_reset() {
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@ -278,9 +220,11 @@ fn (mut ctx Context) termios_loop() {
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if !ctx.paused {
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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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unsafe {
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len := C.read(C.STDIN_FILENO, ctx.read_buf.data + ctx.read_buf.len, ctx.read_buf.cap - ctx.read_buf.len)
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ctx.resize_arr(ctx.read_buf.len + len)
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}
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if ctx.read_buf.len > 0 {
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ctx.parse_events()
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}
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}
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