aboutsummaryrefslogtreecommitdiffstats
path: root/vendor/github.com/nsf/termbox-go/termbox.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/github.com/nsf/termbox-go/termbox.go')
-rw-r--r--vendor/github.com/nsf/termbox-go/termbox.go514
1 files changed, 514 insertions, 0 deletions
diff --git a/vendor/github.com/nsf/termbox-go/termbox.go b/vendor/github.com/nsf/termbox-go/termbox.go
new file mode 100644
index 000000000..6e5ba6c8f
--- /dev/null
+++ b/vendor/github.com/nsf/termbox-go/termbox.go
@@ -0,0 +1,514 @@
+// +build !windows
+
+package termbox
+
+import "unicode/utf8"
+import "bytes"
+import "syscall"
+import "unsafe"
+import "strings"
+import "strconv"
+import "os"
+import "io"
+
+// private API
+
+const (
+ t_enter_ca = iota
+ t_exit_ca
+ t_show_cursor
+ t_hide_cursor
+ t_clear_screen
+ t_sgr0
+ t_underline
+ t_bold
+ t_blink
+ t_reverse
+ t_enter_keypad
+ t_exit_keypad
+ t_enter_mouse
+ t_exit_mouse
+ t_max_funcs
+)
+
+const (
+ coord_invalid = -2
+ attr_invalid = Attribute(0xFFFF)
+)
+
+type input_event struct {
+ data []byte
+ err error
+}
+
+var (
+ // term specific sequences
+ keys []string
+ funcs []string
+
+ // termbox inner state
+ orig_tios syscall_Termios
+ back_buffer cellbuf
+ front_buffer cellbuf
+ termw int
+ termh int
+ input_mode = InputEsc
+ output_mode = OutputNormal
+ out *os.File
+ in int
+ lastfg = attr_invalid
+ lastbg = attr_invalid
+ lastx = coord_invalid
+ lasty = coord_invalid
+ cursor_x = cursor_hidden
+ cursor_y = cursor_hidden
+ foreground = ColorDefault
+ background = ColorDefault
+ inbuf = make([]byte, 0, 64)
+ outbuf bytes.Buffer
+ sigwinch = make(chan os.Signal, 1)
+ sigio = make(chan os.Signal, 1)
+ quit = make(chan int)
+ input_comm = make(chan input_event)
+ interrupt_comm = make(chan struct{})
+ intbuf = make([]byte, 0, 16)
+
+ // grayscale indexes
+ grayscale = []Attribute{
+ 0, 17, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244,
+ 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 232,
+ }
+)
+
+func write_cursor(x, y int) {
+ outbuf.WriteString("\033[")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(y+1), 10))
+ outbuf.WriteString(";")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(x+1), 10))
+ outbuf.WriteString("H")
+}
+
+func write_sgr_fg(a Attribute) {
+ switch output_mode {
+ case Output256, Output216, OutputGrayscale:
+ outbuf.WriteString("\033[38;5;")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+ outbuf.WriteString("m")
+ default:
+ outbuf.WriteString("\033[3")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+ outbuf.WriteString("m")
+ }
+}
+
+func write_sgr_bg(a Attribute) {
+ switch output_mode {
+ case Output256, Output216, OutputGrayscale:
+ outbuf.WriteString("\033[48;5;")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+ outbuf.WriteString("m")
+ default:
+ outbuf.WriteString("\033[4")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+ outbuf.WriteString("m")
+ }
+}
+
+func write_sgr(fg, bg Attribute) {
+ switch output_mode {
+ case Output256, Output216, OutputGrayscale:
+ outbuf.WriteString("\033[38;5;")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(fg-1), 10))
+ outbuf.WriteString("m")
+ outbuf.WriteString("\033[48;5;")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(bg-1), 10))
+ outbuf.WriteString("m")
+ default:
+ outbuf.WriteString("\033[3")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(fg-1), 10))
+ outbuf.WriteString(";4")
+ outbuf.Write(strconv.AppendUint(intbuf, uint64(bg-1), 10))
+ outbuf.WriteString("m")
+ }
+}
+
+type winsize struct {
+ rows uint16
+ cols uint16
+ xpixels uint16
+ ypixels uint16
+}
+
+func get_term_size(fd uintptr) (int, int) {
+ var sz winsize
+ _, _, _ = syscall.Syscall(syscall.SYS_IOCTL,
+ fd, uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&sz)))
+ return int(sz.cols), int(sz.rows)
+}
+
+func send_attr(fg, bg Attribute) {
+ if fg == lastfg && bg == lastbg {
+ return
+ }
+
+ outbuf.WriteString(funcs[t_sgr0])
+
+ var fgcol, bgcol Attribute
+
+ switch output_mode {
+ case Output256:
+ fgcol = fg & 0x1FF
+ bgcol = bg & 0x1FF
+ case Output216:
+ fgcol = fg & 0xFF
+ bgcol = bg & 0xFF
+ if fgcol > 216 {
+ fgcol = ColorDefault
+ }
+ if bgcol > 216 {
+ bgcol = ColorDefault
+ }
+ if fgcol != ColorDefault {
+ fgcol += 0x10
+ }
+ if bgcol != ColorDefault {
+ bgcol += 0x10
+ }
+ case OutputGrayscale:
+ fgcol = fg & 0x1F
+ bgcol = bg & 0x1F
+ if fgcol > 26 {
+ fgcol = ColorDefault
+ }
+ if bgcol > 26 {
+ bgcol = ColorDefault
+ }
+ if fgcol != ColorDefault {
+ fgcol = grayscale[fgcol]
+ }
+ if bgcol != ColorDefault {
+ bgcol = grayscale[bgcol]
+ }
+ default:
+ fgcol = fg & 0x0F
+ bgcol = bg & 0x0F
+ }
+
+ if fgcol != ColorDefault {
+ if bgcol != ColorDefault {
+ write_sgr(fgcol, bgcol)
+ } else {
+ write_sgr_fg(fgcol)
+ }
+ } else if bgcol != ColorDefault {
+ write_sgr_bg(bgcol)
+ }
+
+ if fg&AttrBold != 0 {
+ outbuf.WriteString(funcs[t_bold])
+ }
+ if bg&AttrBold != 0 {
+ outbuf.WriteString(funcs[t_blink])
+ }
+ if fg&AttrUnderline != 0 {
+ outbuf.WriteString(funcs[t_underline])
+ }
+ if fg&AttrReverse|bg&AttrReverse != 0 {
+ outbuf.WriteString(funcs[t_reverse])
+ }
+
+ lastfg, lastbg = fg, bg
+}
+
+func send_char(x, y int, ch rune) {
+ var buf [8]byte
+ n := utf8.EncodeRune(buf[:], ch)
+ if x-1 != lastx || y != lasty {
+ write_cursor(x, y)
+ }
+ lastx, lasty = x, y
+ outbuf.Write(buf[:n])
+}
+
+func flush() error {
+ _, err := io.Copy(out, &outbuf)
+ outbuf.Reset()
+ if err != nil {
+ return err
+ }
+ return nil
+}
+
+func send_clear() error {
+ send_attr(foreground, background)
+ outbuf.WriteString(funcs[t_clear_screen])
+ if !is_cursor_hidden(cursor_x, cursor_y) {
+ write_cursor(cursor_x, cursor_y)
+ }
+
+ // we need to invalidate cursor position too and these two vars are
+ // used only for simple cursor positioning optimization, cursor
+ // actually may be in the correct place, but we simply discard
+ // optimization once and it gives us simple solution for the case when
+ // cursor moved
+ lastx = coord_invalid
+ lasty = coord_invalid
+
+ return flush()
+}
+
+func update_size_maybe() error {
+ w, h := get_term_size(out.Fd())
+ if w != termw || h != termh {
+ termw, termh = w, h
+ back_buffer.resize(termw, termh)
+ front_buffer.resize(termw, termh)
+ front_buffer.clear()
+ return send_clear()
+ }
+ return nil
+}
+
+func tcsetattr(fd uintptr, termios *syscall_Termios) error {
+ r, _, e := syscall.Syscall(syscall.SYS_IOCTL,
+ fd, uintptr(syscall_TCSETS), uintptr(unsafe.Pointer(termios)))
+ if r != 0 {
+ return os.NewSyscallError("SYS_IOCTL", e)
+ }
+ return nil
+}
+
+func tcgetattr(fd uintptr, termios *syscall_Termios) error {
+ r, _, e := syscall.Syscall(syscall.SYS_IOCTL,
+ fd, uintptr(syscall_TCGETS), uintptr(unsafe.Pointer(termios)))
+ if r != 0 {
+ return os.NewSyscallError("SYS_IOCTL", e)
+ }
+ return nil
+}
+
+func parse_mouse_event(event *Event, buf string) (int, bool) {
+ if strings.HasPrefix(buf, "\033[M") && len(buf) >= 6 {
+ // X10 mouse encoding, the simplest one
+ // \033 [ M Cb Cx Cy
+ b := buf[3] - 32
+ switch b & 3 {
+ case 0:
+ if b&64 != 0 {
+ event.Key = MouseWheelUp
+ } else {
+ event.Key = MouseLeft
+ }
+ case 1:
+ if b&64 != 0 {
+ event.Key = MouseWheelDown
+ } else {
+ event.Key = MouseMiddle
+ }
+ case 2:
+ event.Key = MouseRight
+ case 3:
+ event.Key = MouseRelease
+ default:
+ return 6, false
+ }
+ event.Type = EventMouse // KeyEvent by default
+ if b&32 != 0 {
+ event.Mod |= ModMotion
+ }
+
+ // the coord is 1,1 for upper left
+ event.MouseX = int(buf[4]) - 1 - 32
+ event.MouseY = int(buf[5]) - 1 - 32
+ return 6, true
+ } else if strings.HasPrefix(buf, "\033[<") || strings.HasPrefix(buf, "\033[") {
+ // xterm 1006 extended mode or urxvt 1015 extended mode
+ // xterm: \033 [ < Cb ; Cx ; Cy (M or m)
+ // urxvt: \033 [ Cb ; Cx ; Cy M
+
+ // find the first M or m, that's where we stop
+ mi := strings.IndexAny(buf, "Mm")
+ if mi == -1 {
+ return 0, false
+ }
+
+ // whether it's a capital M or not
+ isM := buf[mi] == 'M'
+
+ // whether it's urxvt or not
+ isU := false
+
+ // buf[2] is safe here, because having M or m found means we have at
+ // least 3 bytes in a string
+ if buf[2] == '<' {
+ buf = buf[3:mi]
+ } else {
+ isU = true
+ buf = buf[2:mi]
+ }
+
+ s1 := strings.Index(buf, ";")
+ s2 := strings.LastIndex(buf, ";")
+ // not found or only one ';'
+ if s1 == -1 || s2 == -1 || s1 == s2 {
+ return 0, false
+ }
+
+ n1, err := strconv.ParseInt(buf[0:s1], 10, 64)
+ if err != nil {
+ return 0, false
+ }
+ n2, err := strconv.ParseInt(buf[s1+1:s2], 10, 64)
+ if err != nil {
+ return 0, false
+ }
+ n3, err := strconv.ParseInt(buf[s2+1:], 10, 64)
+ if err != nil {
+ return 0, false
+ }
+
+ // on urxvt, first number is encoded exactly as in X10, but we need to
+ // make it zero-based, on xterm it is zero-based already
+ if isU {
+ n1 -= 32
+ }
+ switch n1 & 3 {
+ case 0:
+ if n1&64 != 0 {
+ event.Key = MouseWheelUp
+ } else {
+ event.Key = MouseLeft
+ }
+ case 1:
+ if n1&64 != 0 {
+ event.Key = MouseWheelDown
+ } else {
+ event.Key = MouseMiddle
+ }
+ case 2:
+ event.Key = MouseRight
+ case 3:
+ event.Key = MouseRelease
+ default:
+ return mi + 1, false
+ }
+ if !isM {
+ // on xterm mouse release is signaled by lowercase m
+ event.Key = MouseRelease
+ }
+
+ event.Type = EventMouse // KeyEvent by default
+ if n1&32 != 0 {
+ event.Mod |= ModMotion
+ }
+
+ event.MouseX = int(n2) - 1
+ event.MouseY = int(n3) - 1
+ return mi + 1, true
+ }
+
+ return 0, false
+}
+
+func parse_escape_sequence(event *Event, buf []byte) (int, bool) {
+ bufstr := string(buf)
+ for i, key := range keys {
+ if strings.HasPrefix(bufstr, key) {
+ event.Ch = 0
+ event.Key = Key(0xFFFF - i)
+ return len(key), true
+ }
+ }
+
+ // if none of the keys match, let's try mouse seqences
+ return parse_mouse_event(event, bufstr)
+}
+
+func extract_raw_event(data []byte, event *Event) bool {
+ if len(inbuf) == 0 {
+ return false
+ }
+
+ n := len(data)
+ if n == 0 {
+ return false
+ }
+
+ n = copy(data, inbuf)
+ copy(inbuf, inbuf[n:])
+ inbuf = inbuf[:len(inbuf)-n]
+
+ event.N = n
+ event.Type = EventRaw
+ return true
+}
+
+func extract_event(inbuf []byte, event *Event) bool {
+ if len(inbuf) == 0 {
+ event.N = 0
+ return false
+ }
+
+ if inbuf[0] == '\033' {
+ // possible escape sequence
+ if n, ok := parse_escape_sequence(event, inbuf); n != 0 {
+ event.N = n
+ return ok
+ }
+
+ // it's not escape sequence, then it's Alt or Esc, check input_mode
+ switch {
+ case input_mode&InputEsc != 0:
+ // if we're in escape mode, fill Esc event, pop buffer, return success
+ event.Ch = 0
+ event.Key = KeyEsc
+ event.Mod = 0
+ event.N = 1
+ return true
+ case input_mode&InputAlt != 0:
+ // if we're in alt mode, set Alt modifier to event and redo parsing
+ event.Mod = ModAlt
+ ok := extract_event(inbuf[1:], event)
+ if ok {
+ event.N++
+ } else {
+ event.N = 0
+ }
+ return ok
+ default:
+ panic("unreachable")
+ }
+ }
+
+ // if we're here, this is not an escape sequence and not an alt sequence
+ // so, it's a FUNCTIONAL KEY or a UNICODE character
+
+ // first of all check if it's a functional key
+ if Key(inbuf[0]) <= KeySpace || Key(inbuf[0]) == KeyBackspace2 {
+ // fill event, pop buffer, return success
+ event.Ch = 0
+ event.Key = Key(inbuf[0])
+ event.N = 1
+ return true
+ }
+
+ // the only possible option is utf8 rune
+ if r, n := utf8.DecodeRune(inbuf); r != utf8.RuneError {
+ event.Ch = r
+ event.Key = 0
+ event.N = n
+ return true
+ }
+
+ return false
+}
+
+func fcntl(fd int, cmd int, arg int) (val int, err error) {
+ r, _, e := syscall.Syscall(syscall.SYS_FCNTL, uintptr(fd), uintptr(cmd),
+ uintptr(arg))
+ val = int(r)
+ if e != 0 {
+ err = e
+ }
+ return
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-17 05:47:20 +0800