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|
//go:build !windows
package tui
import (
"errors"
"os"
"os/exec"
"strings"
"syscall"
"github.com/junegunn/fzf/src/util"
"golang.org/x/sys/unix"
"golang.org/x/term"
)
func IsLightRendererSupported() bool {
return true
}
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
}
return Default16
}
func (r *LightRenderer) fd() int {
return int(r.ttyin.Fd())
}
func (r *LightRenderer) initPlatform() (err error) {
r.origState, err = term.MakeRaw(r.fd())
return err
}
func (r *LightRenderer) closePlatform() {
r.ttyout.Close()
}
func openTty(ttyDefault string, mode int) (*os.File, error) {
var in *os.File
var err error
if len(ttyDefault) > 0 {
in, err = os.OpenFile(ttyDefault, mode, 0)
}
if in == nil || err != nil || ttyDefault != DefaultTtyDevice && !util.IsTty(in) {
tty := ttyname()
if len(tty) > 0 {
if in, err := os.OpenFile(tty, mode, 0); err == nil {
return in, nil
}
}
if ttyDefault != DefaultTtyDevice {
if in, err = os.OpenFile(DefaultTtyDevice, mode, 0); err == nil {
return in, nil
}
}
return nil, errors.New("failed to open " + DefaultTtyDevice)
}
return in, nil
}
func openTtyIn(ttyDefault string) (*os.File, error) {
return openTty(ttyDefault, syscall.O_RDONLY)
}
func openTtyOut(ttyDefault string) (*os.File, error) {
return openTty(ttyDefault, syscall.O_WRONLY)
}
func (r *LightRenderer) setupTerminal() {
term.MakeRaw(r.fd())
}
func (r *LightRenderer) restoreTerminal() {
term.Restore(r.fd(), r.origState)
}
func (r *LightRenderer) updateTerminalSize() {
width, height, err := term.GetSize(r.fd())
if err == nil {
r.width = width
r.height = r.maxHeightFunc(height)
} else {
r.width = getEnv("COLUMNS", defaultWidth)
r.height = r.maxHeightFunc(getEnv("LINES", defaultHeight))
}
}
func (r *LightRenderer) findOffset() (row int, col int) {
r.csi("6n")
r.flush()
var err error
bytes := []byte{}
for tries := 0; tries < offsetPollTries; tries++ {
bytes, err = r.getBytesInternal(bytes, tries > 0)
if err != nil {
return -1, -1
}
offsets := offsetRegexp.FindSubmatch(bytes)
if len(offsets) > 3 {
// Add anything we skipped over to the input buffer
r.buffer = append(r.buffer, offsets[1]...)
return atoi(string(offsets[2]), 0) - 1, atoi(string(offsets[3]), 0) - 1
}
}
return -1, -1
}
func (r *LightRenderer) getch(nonblock bool) (int, bool) {
b := make([]byte, 1)
fd := r.fd()
util.SetNonblock(r.ttyin, nonblock)
_, err := util.Read(fd, b)
if err != nil {
return 0, false
}
return int(b[0]), true
}
func (r *LightRenderer) Size() TermSize {
ws, err := unix.IoctlGetWinsize(int(r.ttyin.Fd()), unix.TIOCGWINSZ)
if err != nil {
return TermSize{}
}
return TermSize{int(ws.Row), int(ws.Col), int(ws.Xpixel), int(ws.Ypixel)}
}
|
