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curses.go
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curses.go
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//go:build !stdout
package main
import (
"os"
"github.com/rthornton128/goncurses"
)
type Screen struct {
*goncurses.Window
}
var (
stdscr Screen
color_attr goncurses.Char = goncurses.A_NORMAL
standout_attr goncurses.Char = goncurses.A_NORMAL
)
const (
KEY_ERR = -1
KEY_UP = goncurses.KEY_UP
KEY_DOWN = goncurses.KEY_DOWN
KEY_LEFT = goncurses.KEY_LEFT
KEY_RIGHT = goncurses.KEY_RIGHT
KEY_RESIZE = goncurses.KEY_RESIZE
)
func KEY_CTRL(x int) int {
return x & 0x1F
}
func StringToColor(arg string) int16 {
switch arg {
case "black":
return goncurses.C_BLACK
case "red":
return goncurses.C_RED
case "green":
return goncurses.C_GREEN
case "yellow":
return goncurses.C_YELLOW
case "blue":
return goncurses.C_BLUE
case "magenta":
return goncurses.C_MAGENTA
case "cyan":
return goncurses.C_CYAN
case "white":
return goncurses.C_WHITE
}
return -1 // default color
}
func InitScreen(fg, bg int16) error {
scr, err := goncurses.Init()
if err != nil {
return err
}
stdscr = Screen{scr}
if err := goncurses.Cursor(0); err != nil {
return err
}
goncurses.Echo(false)
goncurses.CBreak(true)
if err := stdscr.Keypad(true); err != nil {
return err
}
stdscr.Timeout(200)
ClearTerminal()
if goncurses.HasColors() {
if err := goncurses.StartColor(); err != nil {
return err
}
if err := goncurses.UseDefaultColors(); err != nil {
return err
}
if err := goncurses.InitPair(1, fg, bg); err != nil {
return err
}
color_attr = goncurses.ColorPair(1)
}
if os.Getenv("TERM") == "screen" {
standout_attr = goncurses.A_REVERSE
} else {
standout_attr = goncurses.A_STANDOUT
}
return nil
}
func CleanupScreen() {
if err := goncurses.Cursor(1); err != nil {
return
}
goncurses.End()
}
func ReadIncoming() int {
return int(stdscr.GetChar())
}
func ClearTerminal() {
GlobalLock()
if err := stdscr.Clear(); err != nil {
panic(err)
}
stdscr.Window.Refresh()
GlobalUnlock()
}
func FlashTerminal() {
goncurses.Flash()
}
func AllocScreen(ylen, xlen, ypos, xpos int) Screen {
GlobalLock()
scr, err := goncurses.NewWindow(ylen, xlen, ypos, xpos)
if err != nil {
panic(err)
}
scr.ScrollOk(false)
//scr.IdlOk(false) // XXX
if err := scr.Keypad(true); err != nil {
panic(err)
}
GlobalUnlock()
return Screen{scr}
}
func (this *Screen) Delete() {
GlobalLock()
_ = this.Window.Delete()
GlobalUnlock()
}
func (this *Screen) Print(y, x int, standout bool, s string) {
GlobalLock()
attr := standout_attr
if !standout {
attr = goncurses.A_NORMAL
}
_ = this.Window.AttrOn(attr)
this.Window.MovePrint(y, x, s)
_ = this.Window.AttrOff(attr)
GlobalUnlock()
}
func (this *Screen) Refresh() {
GlobalLock()
this.Window.Refresh()
GlobalUnlock()
}
func (this *Screen) Erase() {
GlobalLock()
this.Window.Erase()
GlobalUnlock()
}
func (this *Screen) Resize(ylen, xlen int) {
GlobalLock()
this.Window.Resize(ylen, xlen)
GlobalUnlock()
}
func (this *Screen) Move(ypos, xpos int) {
GlobalLock()
this.Window.Move(ypos, xpos)
GlobalUnlock()
}
func (this *Screen) Box() {
GlobalLock()
err := this.Window.Border(goncurses.ACS_VLINE, goncurses.ACS_VLINE,
goncurses.ACS_HLINE, goncurses.ACS_HLINE,
goncurses.ACS_ULCORNER, goncurses.ACS_URCORNER,
goncurses.ACS_LLCORNER, goncurses.ACS_LRCORNER)
if err != nil {
panic(err)
}
GlobalUnlock()
}
func (this *Screen) Bkgd() {
GlobalLock()
if color_attr != goncurses.A_NORMAL {
this.Window.SetBackground(color_attr | ' ')
}
GlobalUnlock()
}