Method Undo

internal/buffer/eventhandler.go:257–279

Undo the first event in the undo stack. Returns false if the stack is empty.

()

// Undo the first event in the undo stack. Returns false if the stack is empty.
func (eh *EventHandler) Undo() bool {
	t := eh.UndoStack.Peek()
	if t == nil {
		return false
	}

	startTime := t.Time.UnixNano() / int64(time.Millisecond)
	endTime := startTime - (startTime % undoThreshold)

	for {
		t = eh.UndoStack.Peek()
		if t == nil {
			break
		}

		if t.Time.UnixNano()/int64(time.Millisecond) < endTime {
			break
		}

		eh.UndoOneEvent()
	}
	return true
}

// UndoOneEvent undoes one event
func (eh *EventHandler) UndoOneEvent() {