118 lines
2.3 KiB
Go
118 lines
2.3 KiB
Go
package main
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import (
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"fmt"
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"os"
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"github.com/gdamore/tcell/v2"
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"code.rocketnine.space/tslocum/cbind"
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)
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func main() {
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tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
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s, e := tcell.NewScreen()
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if e != nil {
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fmt.Fprintf(os.Stderr, "%v\n", e)
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os.Exit(1)
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}
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if e = s.Init(); e != nil {
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fmt.Fprintf(os.Stderr, "%v\n", e)
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os.Exit(1)
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}
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quit := make(chan struct{})
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quitApp := func(ev *tcell.EventKey) *tcell.EventKey {
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quit <- struct{}{}
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return nil
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}
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configuration := cbind.NewConfiguration()
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configuration.SetKey(tcell.ModNone, tcell.KeyEscape, quitApp)
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configuration.SetRune(tcell.ModCtrl, 'c', quitApp)
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s.SetStyle(tcell.StyleDefault.
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Foreground(tcell.ColorWhite).
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Background(tcell.ColorBlack))
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s.Clear()
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go func() {
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for {
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ev := s.PollEvent()
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switch ev := ev.(type) {
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case *tcell.EventResize:
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s.Sync()
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case *tcell.EventKey:
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s.SetStyle(tcell.StyleDefault.
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Foreground(tcell.ColorWhite).
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Background(tcell.ColorBlack))
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s.Clear()
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putln(s, 0, fmt.Sprintf("Event: %d %d %d", ev.Modifiers(), ev.Key(), ev.Rune()))
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str, err := cbind.Encode(ev.Modifiers(), ev.Key(), ev.Rune())
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if err != nil {
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str = fmt.Sprintf("error: %s", err)
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}
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putln(s, 2, str)
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mod, key, ch, err := cbind.Decode(str)
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if err != nil {
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putln(s, 4, err.Error())
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} else {
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putln(s, 4, fmt.Sprintf("Re-encoded as: %d %d %d", mod, key, ch))
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}
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configuration.Capture(ev)
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s.Sync()
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}
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}
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}()
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s.Show()
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<-quit
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s.Fini()
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}
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// putln and puts functions are copied from the tcell unicode demo.
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// Apache License, Version 2.0
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func putln(s tcell.Screen, y int, str string) {
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puts(s, tcell.StyleDefault, 0, y, str)
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}
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func puts(s tcell.Screen, style tcell.Style, x, y int, str string) {
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i := 0
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var deferred []rune
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dwidth := 0
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zwj := false
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for _, r := range str {
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if r == '\u200d' {
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if len(deferred) == 0 {
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deferred = append(deferred, ' ')
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dwidth = 1
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}
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deferred = append(deferred, r)
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zwj = true
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continue
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}
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if zwj {
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deferred = append(deferred, r)
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zwj = false
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continue
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}
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if len(deferred) != 0 {
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s.SetContent(x+i, y, deferred[0], deferred[1:], style)
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i += dwidth
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}
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deferred = nil
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dwidth = 1
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deferred = append(deferred, r)
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}
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if len(deferred) != 0 {
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s.SetContent(x+i, y, deferred[0], deferred[1:], style)
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i += dwidth
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}
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}
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