uapmd-binding/dev.atsushieno.uapmd/AndroidUndoEngine

AndroidUndoEngine

class AndroidUndoEngine : UndoEngine

Properties

open override val state: UndoState

Functions

open override fun beginCompound(description: String, origin: MutationOrigin = MutationOrigin.User): UndoResult

Opens one named history step. Operations performed while it is open are applied immediately but enter history only when endCompound succeeds. Nested compounds are deliberately rejected.

open override fun beginGesture(description: String, origin: MutationOrigin = MutationOrigin.User): UndoResult

A gesture is a named compound scope that coalesces adjacent compatible operations: intermediate values are applied, but history retains only the initial and final ones.

open override fun cancelCompound(completion: (UndoResult) -> Unit? = null)

Reverts every successfully performed child in reverse order.

open override fun cancelGesture(completion: (UndoResult) -> Unit? = null)

open override fun clear(markCurrentStateSaved: Boolean = true): Boolean

Fails while an operation is pending or a compound step is open.

open override fun endCompound(completion: (UndoResult) -> Unit? = null)

open override fun endGesture(completion: (UndoResult) -> Unit? = null)

open override fun markSaved(): Boolean

open override fun markStateSaved(stateId: Long): Boolean

open override fun redo(completion: (UndoResult) -> Unit? = null)

setMaximumHistorySizeInBytes

open override fun setMaximumHistorySizeInBytes(bytes: Long): Boolean

open override fun shutdown()

Rejects new work and completes pending notification as Cancelled.

open override fun undo(completion: (UndoResult) -> Unit? = null)