97 lines
1.3 KiB
Go
97 lines
1.3 KiB
Go
package editor
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import (
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"strings"
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"tea.kareha.org/lab/levi/internal/console"
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"tea.kareha.org/lab/levi/internal/util"
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)
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type mode int
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const (
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modeCommand = iota
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modeInsert
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)
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type Editor struct {
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scr *Screen
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kb *Keyboard
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x, y int
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line *strings.Builder
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mode mode
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}
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func New() *Editor {
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scr := NewScreen()
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kb := NewKeyboard()
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return &Editor{
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scr: &scr,
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kb: &kb,
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x: 0,
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y: 0,
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line: new(strings.Builder),
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mode: modeCommand,
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}
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}
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func (ed *Editor) addRune(r rune) {
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ed.line.WriteRune(r)
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}
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func (ed *Editor) drawStatus() {
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_, h := console.Size()
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console.MoveCursor(0, h - 2)
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switch ed.mode {
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case modeCommand:
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console.Print("-- [command] q: quit, i: insert --")
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case modeInsert:
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console.Print("-- [insert] Esc: command mode --")
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}
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}
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func (ed *Editor) drawBuffer() {
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console.Print(ed.line.String())
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}
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func (ed *Editor) repaint() {
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console.HideCursor()
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console.Clear()
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console.HomeCursor()
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ed.drawBuffer()
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ed.drawStatus()
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console.MoveCursor(ed.x, ed.y)
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console.ShowCursor()
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}
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func (ed *Editor) Main() {
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for {
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ed.repaint()
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r := ed.kb.ReadRune()
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switch ed.mode {
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case modeCommand:
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switch r {
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case 'q':
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return
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case 'i':
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ed.mode = modeInsert
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}
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case modeInsert:
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switch r {
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case Esc:
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ed.mode = modeCommand
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default:
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ed.addRune(r)
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ed.x += util.RuneWidth(r)
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}
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}
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}
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}
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