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Use crypto/ssh/terminal instead of external stty command

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This commit is contained in:
Junegunn Choi 2017-01-15 13:10:59 +09:00
parent 2720816266
commit 03f5ef08c8
No known key found for this signature in database
GPG Key ID: 254BC280FEF9C627
1 changed files with 39 additions and 26 deletions
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65
src/tui/light.go
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@ -11,6 +11,8 @@ import (
"unicode/utf8"
"github.com/junegunn/fzf/src/util"
"golang.org/x/crypto/ssh/terminal"
)
const (
@ -20,10 +22,12 @@ const (
escPollInterval = 5
)
const consoleDevice string = "/dev/tty"
func openTtyIn() *os.File {
in, err := os.OpenFile("/dev/tty", syscall.O_RDONLY, 0)
in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
if err != nil {
panic("Failed to open /dev/tty")
panic("Failed to open " + consoleDevice)
}
return in
}
@ -64,7 +68,7 @@ type LightRenderer struct {
clickY []int
ttyin *os.File
buffer []byte
ostty string
origState *terminal.State
width int
height int
yoffset int
@ -104,7 +108,14 @@ func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop in
return &r
}
func (r *LightRenderer) fd() int {
return int(r.ttyin.Fd())
}
func (r *LightRenderer) defaultTheme() *ColorTheme {
if strings.Contains(os.Getenv("TERM"), "256") {
return Dark256
}
colors, err := exec.Command("tput", "colors").Output()
if err == nil && atoi(strings.TrimSpace(string(colors)), 16) > 16 {
return Dark256
@ -112,17 +123,6 @@ func (r *LightRenderer) defaultTheme() *ColorTheme {
return Default16
}
func (r *LightRenderer) stty(cmd string) string {
proc := exec.Command("stty", cmd)
proc.Stdin = r.ttyin
out, err := proc.Output()
if err != nil {
// Not sure how to handle this
panic("stty " + cmd + ": " + err.Error())
}
return strings.TrimSpace(string(out))
}
func (r *LightRenderer) findOffset() (row int, col int) {
r.csi("6n")
r.flush()
@ -167,8 +167,13 @@ func (r *LightRenderer) Init() {
}
r.escDelay = delay
r.ostty = r.stty("-g")
r.stty("raw")
fd := r.fd()
origState, err := terminal.GetState(fd)
if err != nil {
errorExit(err.Error())
}
r.origState = origState
terminal.MakeRaw(fd)
r.updateTerminalSize()
initTheme(r.theme, r.defaultTheme(), r.forceBlack)
@ -212,14 +217,22 @@ func (r *LightRenderer) origin() {
r.move(0, 0)
}
func getEnv(name string, defaultValue int) int {
env := os.Getenv(name)
if len(env) == 0 {
return defaultValue
}
return atoi(env, defaultValue)
}
func (r *LightRenderer) updateTerminalSize() {
sizes := strings.Split(r.stty("size"), " ")
if len(sizes) < 2 {
r.width = defaultWidth
r.height = r.maxHeightFunc(defaultHeight)
width, height, err := terminal.GetSize(r.fd())
if err == nil {
r.width = width
r.height = r.maxHeightFunc(height)
} else {
r.width = atoi(sizes[1], defaultWidth)
r.height = r.maxHeightFunc(atoi(sizes[0], defaultHeight))
r.width = getEnv("COLUMNS", defaultWidth)
r.height = r.maxHeightFunc(getEnv("LINES", defaultHeight))
}
}
@ -241,7 +254,7 @@ func (r *LightRenderer) getBytesInternal(buffer []byte) []byte {
c, ok := r.getch(false)
if !ok {
r.Close()
errorExit("Failed to read /dev/tty")
errorExit("Failed to read " + consoleDevice)
}
retries := 0
@ -486,13 +499,13 @@ func (r *LightRenderer) mouseSequence(sz *int) Event {
}
func (r *LightRenderer) Pause() {
r.stty(r.ostty)
terminal.Restore(r.fd(), r.origState)
r.csi("?1049h")
r.flush()
}
func (r *LightRenderer) Resume() bool {
r.stty("raw")
terminal.MakeRaw(r.fd())
r.csi("?1049l")
r.flush()
// Should redraw
@ -525,7 +538,7 @@ func (r *LightRenderer) Close() {
r.csi("A")
}
r.flush()
r.stty(r.ostty)
terminal.Restore(r.fd(), r.origState)
}
func (r *LightRenderer) MaxX() int {