Method snapCursorOutOfChip

internal/tui/prompt.go:148–161

snapCursorOutOfChip snaps a cursor sitting strictly inside a chip to the nearer boundary. Returns the (possibly adjusted) offset so callers skip a second cursorRuneOffset read.

()

// nearer boundary. Returns the (possibly adjusted) offset so callers skip a
// second cursorRuneOffset read.
func (p *promptInput) snapCursorOutOfChip() int {
	cur := p.cursorRuneOffset()
	for _, chip := range p.spans {
		if cur > chip.start && cur < chip.end {
			target := chip.end
			if cur-chip.start < chip.end-cur {
				target = chip.start
			}
			p.setCursorRuneOffset(target)
			return target
		}
	}
	return cur
}

// chipAtBoundary returns the chip whose start (atStart=true) or end
// (atStart=false) coincides with cur, the check Backspace/Delete/Left/Right share.