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Make escape delay configurable via ncurses standard $ESCDELAY

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Also reduce the default delay to 50ms. We should not set it to 0ms as it
breaks escape sequences on WSL. If 50ms is not enough, one can increase
the delay by setting $ESCDELAY to a larger value.
This commit is contained in:
Junegunn Choi 2016-11-23 02:18:18 +09:00
parent 8524ea7441
commit 43425158f4
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GPG Key ID: 254BC280FEF9C627
1 changed files with 15 additions and 4 deletions
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19
src/tui/ncurses.go
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@ -23,6 +23,7 @@ import "C"
import (
"fmt"
"os"
"strconv"
"strings"
"time"
"unicode/utf8"
@ -103,8 +104,16 @@ func Init(theme *ColorTheme, black bool, mouse bool) {
C.raw() // stty dsusp undef
C.nonl()
C.keypad(C.stdscr, true)
C.set_escdelay(100)
C.timeout(100) // ESCDELAY 100ms + timeout 100ms
delay := 50
delayEnv := os.Getenv("ESCDELAY")
if len(delayEnv) > 0 {
num, err := strconv.Atoi(delayEnv)
if err == nil && num >= 0 {
delay = num
}
}
C.set_escdelay(C.int(delay))
_color = theme != nil
if _color {
@ -293,8 +302,10 @@ func consume(expects ...rune) bool {
}
func escSequence() Event {
// nodelay is not thread-safe (e.g. <ESC><CTRL-P>)
// C.nodelay(C.stdscr, true)
C.nodelay(C.stdscr, true)
defer func() {
C.nodelay(C.stdscr, false)
}()
c := C.getch()
switch c {
case C.ERR: