123 lines
2.6 KiB
Go
123 lines
2.6 KiB
Go
package main
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import (
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"fmt"
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"syscall"
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"github.com/c-bata/go-prompt-toolkit/prompt"
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)
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func enterAlternateScreen(fd int) {
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syscall.Write(fd, []byte{0x1b, 0x5b, 0x3f, 0x01, 0x00, 0x04, 0x09, 0x68, 0x1b, 0x5b, 0x48})
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}
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func main() {
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in := prompt.NewVT100Parser()
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out := prompt.NewVT100Writer()
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in.Setup()
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defer in.TearDown()
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defer fmt.Println("\nexited!")
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out.SetTitle("はろー")
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out.ScrollDown()
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out.ScrollDown()
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out.ScrollDown()
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out.ScrollDown()
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out.ScrollUp()
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out.ScrollUp()
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out.ScrollUp()
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out.ScrollUp()
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out.Flush()
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bufCh := make(chan []byte, 128)
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go readBuffer(bufCh)
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buffer := prompt.NewBuffer()
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for {
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b := <-bufCh
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if ac := in.GetASCIICode(b); ac == nil {
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out.EraseDown()
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out.WriteRaw(b)
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buffer.InsertText(string(b), false, true)
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} else if ac.Key == prompt.Enter || ac.Key == prompt.ControlJ {
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buffer.InsertText("\n", false, true)
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} else if ac.Key == prompt.Left {
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l := buffer.CursorLeft(1)
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if l == 0 {
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continue
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}
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out.CursorDown(1)
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out.CursorBackward(1)
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out.EraseDown()
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out.CursorUp(1)
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} else if ac.Key == prompt.Right {
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l := buffer.CursorRight(1)
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if l == 0 {
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continue
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}
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out.CursorDown(1)
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out.EraseDown()
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out.CursorForward(1)
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out.CursorUp(1)
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} else if ac.Key == prompt.Backspace {
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buffer.DeleteBeforeCursor(1)
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out.CursorBackward(1)
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out.EraseDown()
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} else if ac.Key == prompt.Right {
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buffer.CursorRight(1)
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} else if ac.Key == prompt.ControlT {
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enterAlternateScreen(syscall.Stdout)
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} else if ac.Key == prompt.ControlC {
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out.EraseDown()
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out.ClearTitle()
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out.Flush()
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return
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} else {
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out.WriteRaw(b)
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//buffer.InsertText(ac.Key.String(), false, true)
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}
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// Display completions
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if w := buffer.Document().GetWordBeforeCursor(); w != "" {
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out.SetColor("white", "teal")
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out.CursorDown(1)
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out.Write([]byte(" Foo "))
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out.SetColor("white", "darkGray")
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out.Write([]byte(" "))
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out.SetColor("white", "teal")
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out.CursorBackward(len("foo") + 3)
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out.CursorDown(1)
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out.Write([]byte(" Hello "))
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out.SetColor("white", "darkGray")
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out.Write([]byte(" "))
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out.SetColor("white", "teal")
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out.CursorBackward(len("Hello") + 3)
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out.CursorDown(1)
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out.Write([]byte(" World "))
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out.SetColor("white", "darkGray")
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out.Write([]byte(" "))
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out.SetColor("white", "teal")
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out.CursorBackward(len("World") + 3)
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out.CursorUp(3)
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out.SetColor("default", "default")
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}
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out.Flush()
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}
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}
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func readBuffer(bufCh chan []byte) {
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buf := make([]byte, 1024)
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for {
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if n, err := syscall.Read(syscall.Stdin, buf); err == nil {
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bufCh <- buf[:n]
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}
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}
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}
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