Files
levi/internal/editor/command.go
2026-03-27 12:08:31 +09:00

81 lines
1.3 KiB
Go

package editor
// key: i
func (ed *Editor) Insert() {
if ed.mode == ModeInsert {
panic("invalid state")
}
ed.ins.Init(ed.CurrentLine(), ed.col)
ed.mode = ModeInsert
}
// key: a
func (ed *Editor) InsertAfter() {
if ed.mode == ModeInsert {
panic("invalid state")
}
rc := ed.RuneCount()
if ed.col >= rc-1 {
ed.col = rc
} else {
ed.MoveRight(1)
}
ed.Insert()
}
// key: h
func (ed *Editor) MoveLeft(n int) {
if ed.mode != ModeCommand {
panic("invalid state")
}
ed.col -= n
ed.Confine()
}
// key: l
func (ed *Editor) MoveRight(n int) {
if ed.mode != ModeCommand {
panic("invalid state")
}
ed.col += n
ed.Confine()
}
// key: j
func (ed *Editor) MoveDown(n int) {
if ed.mode != ModeCommand {
panic("invalid state")
}
ed.row += n
ed.Confine()
}
// key: k
func (ed *Editor) MoveUp(n int) {
if ed.mode != ModeCommand {
panic("invalid state")
}
ed.row -= n
ed.Confine()
}
// key: x
func (ed *Editor) DeleteRune(n int) {
if ed.mode != ModeCommand {
panic("invalid state")
}
if len(ed.CurrentLine()) < 1 {
ed.Ring()
return
}
rs := []rune(ed.CurrentLine())
if ed.col < 1 {
ed.lines[ed.row] = string(rs[1:])
} else {
head := string(rs[:ed.col])
tail := string(rs[ed.col+1:])
ed.lines[ed.row] = head + tail
}
ed.Confine()
}