PSPDFUndoCoalescing

Objective-C

NS_CLOSED_ENUM(NSUInteger, PSPDFUndoCoalescing) {
    /// Does not coalesce events with the same key at all but rather creates one new undo event for every single change.
    PSPDFUndoCoalescingNone,

    /// Coalesces events with the same key by time. Assuming that a key changes a number of times over a
    /// short period of time, only the initial value will be recorded.
    PSPDFUndoCoalescingTimed,

    /// Puts all subsequent changes to one key into the same group. This means that constant changes
    /// of the same value will result in exactly one event, which restores the property to its initial value.
    PSPDFUndoCoalescingAll
}

Swift

@frozen enum UndoCoalescingg : UInt