125 lines
2.2 KiB
Go
125 lines
2.2 KiB
Go
package editor
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import (
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"unicode/utf8"
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"tea.kareha.org/lab/termi"
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)
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func (ed *Editor) exitInsert() {
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ed.lines[ed.row] = ed.head + ed.insert.String() + ed.tail
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ed.tail = ""
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ed.insert.Reset()
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ed.mode = modeCommand
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ed.moveLeft(1)
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}
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func (ed *Editor) insertNewline() {
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before := make([]string, 0, len(ed.lines)+1)
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before = append(before, ed.lines[:ed.row]...)
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var after []string
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if ed.row+1 < len(ed.lines) {
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after = ed.lines[ed.row+1:]
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} else {
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after = []string{}
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}
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newLines := []string{
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ed.head + ed.insert.String(),
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ed.tail,
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}
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ed.lines = append(append(before, newLines...), after...)
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ed.row++
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ed.col = 0
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ed.head = ""
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ed.insert.Reset()
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}
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func (ed *Editor) deleteBefore() {
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if ed.insert.Len() < 1 {
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ed.ring()
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return
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}
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insert := ed.insert.String()
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_, size := utf8.DecodeLastRuneInString(insert)
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insert = insert[:len(insert)-size]
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ed.insert.Reset()
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ed.insert.WriteString(insert)
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ed.col--
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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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key := termi.ReadKey()
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switch ed.mode {
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case modeCommand:
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switch key.Kind {
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case termi.KeyRune:
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switch key.Rune {
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case 'q':
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return
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case 'i':
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ed.enterInsert()
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case 'a':
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ed.enterInsertAfter()
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case 'h':
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ed.moveLeft(1)
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case 'l':
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ed.moveRight(1)
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case 'j':
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ed.moveDown(1)
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case 'k':
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ed.moveUp(1)
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case 'x':
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ed.deleteRune(1)
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default:
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ed.ring()
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}
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case termi.KeyUp:
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ed.moveUp(1)
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case termi.KeyDown:
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ed.moveDown(1)
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case termi.KeyRight:
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ed.moveRight(1)
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case termi.KeyLeft:
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ed.moveLeft(1)
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default:
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ed.ring()
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}
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case modeInsert:
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switch key.Kind {
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case termi.KeyRune:
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switch key.Rune {
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case termi.RuneEscape:
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ed.exitInsert()
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case termi.RuneEnter:
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ed.insertNewline()
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case termi.RuneBackspace:
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ed.deleteBefore()
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case termi.RuneDelete:
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ed.deleteBefore()
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default:
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ed.insertRune(key.Rune)
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}
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case termi.KeyUp:
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ed.exitInsert()
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ed.moveUp(1)
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case termi.KeyDown:
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ed.exitInsert()
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ed.moveDown(1)
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case termi.KeyRight:
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ed.exitInsert()
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ed.moveRight(1)
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case termi.KeyLeft:
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ed.exitInsert()
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ed.moveLeft(1)
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default:
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ed.ring()
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}
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}
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}
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}
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