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425 lines
7.1 KiB
Go
425 lines
7.1 KiB
Go
package curses
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// #include <ncurses.h>
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// #include <locale.h>
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// #cgo LDFLAGS: -lncurses
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import "C"
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import (
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"os"
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"os/signal"
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"syscall"
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"time"
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"unicode/utf8"
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)
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const (
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RUNE = iota
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CTRL_A
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CTRL_B
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CTRL_C
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CTRL_D
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CTRL_E
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CTRL_F
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CTRL_G
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CTRL_H
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TAB
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CTRL_J
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CTRL_K
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CTRL_L
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CTRL_M
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CTRL_N
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CTRL_O
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CTRL_P
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CTRL_Q
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CTRL_R
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CTRL_S
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CTRL_T
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CTRL_U
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CTRL_V
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CTRL_W
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CTRL_X
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CTRL_Y
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CTRL_Z
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ESC
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INVALID
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MOUSE
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BTAB
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DEL
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PGUP
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PGDN
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ALT_B
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ALT_F
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ALT_D
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ALT_BS
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)
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const (
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COL_NORMAL = iota
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COL_PROMPT
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COL_MATCH
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COL_CURRENT
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COL_CURRENT_MATCH
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COL_SPINNER
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COL_INFO
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COL_CURSOR
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COL_SELECTED
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)
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const (
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DOUBLE_CLICK_DURATION = 500 * time.Millisecond
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)
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type Event struct {
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Type int
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Char rune
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MouseEvent *MouseEvent
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}
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type MouseEvent struct {
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Y int
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X int
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S int
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Down bool
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Double bool
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Mod bool
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}
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var (
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_buf []byte
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_in *os.File
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_color func(int, bool) C.int
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_prevDownTime time.Time
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_prevDownY int
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_clickY []int
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)
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func init() {
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_prevDownTime = time.Unix(0, 0)
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_clickY = []int{}
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}
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func attrColored(pair int, bold bool) C.int {
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var attr C.int = 0
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if pair > COL_NORMAL {
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attr = C.COLOR_PAIR(C.int(pair))
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}
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if bold {
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attr = attr | C.A_BOLD
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}
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return attr
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}
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func attrMono(pair int, bold bool) C.int {
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var attr C.int = 0
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switch pair {
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case COL_CURRENT:
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if bold {
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attr = C.A_REVERSE
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}
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case COL_MATCH:
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attr = C.A_UNDERLINE
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case COL_CURRENT_MATCH:
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attr = C.A_UNDERLINE | C.A_REVERSE
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}
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if bold {
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attr = attr | C.A_BOLD
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}
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return attr
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}
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func MaxX() int {
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return int(C.COLS)
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}
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func MaxY() int {
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return int(C.LINES)
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}
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func getch(nonblock bool) int {
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b := make([]byte, 1)
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syscall.SetNonblock(int(_in.Fd()), nonblock)
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_, err := _in.Read(b)
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if err != nil {
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return -1
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}
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return int(b[0])
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}
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func Init(color bool, color256 bool, black bool, mouse bool) {
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{
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in, err := os.OpenFile("/dev/tty", syscall.O_RDONLY, 0)
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if err != nil {
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panic("Failed to open /dev/tty")
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}
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_in = in
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// Break STDIN
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// syscall.Dup2(int(in.Fd()), int(os.Stdin.Fd()))
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}
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swapOutput()
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C.setlocale(C.LC_ALL, C.CString(""))
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C.initscr()
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if mouse {
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C.mousemask(C.ALL_MOUSE_EVENTS, nil)
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}
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C.cbreak()
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C.noecho()
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C.raw() // stty dsusp undef
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C.set_tabsize(4) // FIXME
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intChan := make(chan os.Signal, 1)
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signal.Notify(intChan, os.Interrupt, os.Kill)
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go func() {
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<-intChan
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Close()
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os.Exit(1)
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}()
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if color {
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C.start_color()
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var bg C.short
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if black {
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bg = C.COLOR_BLACK
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} else {
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C.use_default_colors()
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bg = -1
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}
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if color256 {
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C.init_pair(COL_PROMPT, 110, bg)
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C.init_pair(COL_MATCH, 108, bg)
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C.init_pair(COL_CURRENT, 254, 236)
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C.init_pair(COL_CURRENT_MATCH, 151, 236)
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C.init_pair(COL_SPINNER, 148, bg)
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C.init_pair(COL_INFO, 144, bg)
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C.init_pair(COL_CURSOR, 161, 236)
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C.init_pair(COL_SELECTED, 168, 236)
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} else {
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C.init_pair(COL_PROMPT, C.COLOR_BLUE, bg)
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C.init_pair(COL_MATCH, C.COLOR_GREEN, bg)
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C.init_pair(COL_CURRENT, C.COLOR_YELLOW, C.COLOR_BLACK)
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C.init_pair(COL_CURRENT_MATCH, C.COLOR_GREEN, C.COLOR_BLACK)
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C.init_pair(COL_SPINNER, C.COLOR_GREEN, bg)
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C.init_pair(COL_INFO, C.COLOR_WHITE, bg)
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C.init_pair(COL_CURSOR, C.COLOR_RED, C.COLOR_BLACK)
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C.init_pair(COL_SELECTED, C.COLOR_MAGENTA, C.COLOR_BLACK)
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}
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_color = attrColored
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} else {
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_color = attrMono
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}
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}
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func Close() {
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C.endwin()
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swapOutput()
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}
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func swapOutput() {
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syscall.Dup2(2, 3)
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syscall.Dup2(1, 2)
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syscall.Dup2(3, 1)
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}
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func GetBytes() []byte {
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c := getch(false)
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_buf = append(_buf, byte(c))
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for {
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c = getch(true)
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if c == -1 {
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break
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}
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_buf = append(_buf, byte(c))
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}
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return _buf
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}
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// 27 (91 79) 77 type x y
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func mouseSequence(sz *int) Event {
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if len(_buf) < 6 {
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return Event{INVALID, 0, nil}
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}
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*sz = 6
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switch _buf[3] {
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case 32, 36, 40, 48, // mouse-down / shift / cmd / ctrl
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35, 39, 43, 51: // mouse-up / shift / cmd / ctrl
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mod := _buf[3] >= 36
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down := _buf[3]%2 == 0
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x := int(_buf[4] - 33)
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y := int(_buf[5] - 33)
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double := false
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if down {
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now := time.Now()
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if now.Sub(_prevDownTime) < DOUBLE_CLICK_DURATION {
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_clickY = append(_clickY, y)
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} else {
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_clickY = []int{y}
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}
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_prevDownTime = now
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} else {
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if len(_clickY) > 1 && _clickY[0] == _clickY[1] &&
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time.Now().Sub(_prevDownTime) < DOUBLE_CLICK_DURATION {
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double = true
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}
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}
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return Event{MOUSE, 0, &MouseEvent{y, x, 0, down, double, mod}}
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case 96, 100, 104, 112, // scroll-up / shift / cmd / ctrl
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97, 101, 105, 113: // scroll-down / shift / cmd / ctrl
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mod := _buf[3] >= 100
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s := 1 - int(_buf[3]%2)*2
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return Event{MOUSE, 0, &MouseEvent{0, 0, s, false, false, mod}}
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}
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return Event{INVALID, 0, nil}
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}
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func escSequence(sz *int) Event {
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if len(_buf) < 2 {
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return Event{ESC, 0, nil}
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}
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*sz = 2
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switch _buf[1] {
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case 98:
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return Event{ALT_B, 0, nil}
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case 100:
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return Event{ALT_D, 0, nil}
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case 102:
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return Event{ALT_F, 0, nil}
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case 127:
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return Event{ALT_BS, 0, nil}
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case 91, 79:
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if len(_buf) < 3 {
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return Event{INVALID, 0, nil}
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}
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*sz = 3
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switch _buf[2] {
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case 68:
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return Event{CTRL_B, 0, nil}
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case 67:
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return Event{CTRL_F, 0, nil}
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case 66:
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return Event{CTRL_J, 0, nil}
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case 65:
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return Event{CTRL_K, 0, nil}
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case 90:
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return Event{BTAB, 0, nil}
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case 72:
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return Event{CTRL_A, 0, nil}
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case 70:
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return Event{CTRL_E, 0, nil}
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case 77:
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return mouseSequence(sz)
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case 49, 50, 51, 52, 53, 54:
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if len(_buf) < 4 {
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return Event{INVALID, 0, nil}
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}
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*sz = 4
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switch _buf[2] {
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case 50:
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return Event{INVALID, 0, nil} // INS
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case 51:
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return Event{DEL, 0, nil}
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case 52:
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return Event{CTRL_E, 0, nil}
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case 53:
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return Event{PGUP, 0, nil}
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case 54:
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return Event{PGDN, 0, nil}
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case 49:
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switch _buf[3] {
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case 126:
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return Event{CTRL_A, 0, nil}
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case 59:
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if len(_buf) != 6 {
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return Event{INVALID, 0, nil}
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}
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*sz = 6
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switch _buf[4] {
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case 50:
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switch _buf[5] {
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case 68:
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return Event{CTRL_A, 0, nil}
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case 67:
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return Event{CTRL_E, 0, nil}
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}
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case 53:
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switch _buf[5] {
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case 68:
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return Event{ALT_B, 0, nil}
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case 67:
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return Event{ALT_F, 0, nil}
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}
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} // _buf[4]
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} // _buf[3]
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} // _buf[2]
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} // _buf[2]
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} // _buf[1]
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return Event{INVALID, 0, nil}
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}
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func GetChar() Event {
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if len(_buf) == 0 {
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_buf = GetBytes()
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}
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if len(_buf) == 0 {
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panic("Empty _buffer")
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}
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sz := 1
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defer func() {
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_buf = _buf[sz:]
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}()
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switch _buf[0] {
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case CTRL_C, CTRL_G, CTRL_Q:
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return Event{CTRL_C, 0, nil}
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case 127:
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return Event{CTRL_H, 0, nil}
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case ESC:
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return escSequence(&sz)
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}
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// CTRL-A ~ CTRL-Z
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if _buf[0] <= CTRL_Z {
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return Event{int(_buf[0]), 0, nil}
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}
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r, rsz := utf8.DecodeRune(_buf)
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sz = rsz
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return Event{RUNE, r, nil}
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}
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func Move(y int, x int) {
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C.move(C.int(y), C.int(x))
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}
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func MoveAndClear(y int, x int) {
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Move(y, x)
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C.clrtoeol()
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}
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func Print(text string) {
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C.addstr(C.CString(text))
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}
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func CPrint(pair int, bold bool, text string) {
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attr := _color(pair, bold)
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C.attron(attr)
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Print(text)
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C.attroff(attr)
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}
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func Clear() {
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C.clear()
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}
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func Refresh() {
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C.refresh()
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}
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