UndoRedoMethods

Undo/Redo methods returned from injectGridUndoRedo.

Uses lazy discovery - the grid is found on first method call, not during initialization.

Properties

Property	Type	Description
undo	() => UndoRedoAction | unknown	Undo the last edit action.
redo	() => UndoRedoAction | unknown	Redo the last undone action.
canUndo	Signal<boolean>	Reactive signal indicating whether undo is available. Updates automatically when edits are made, undone, redone, or history is cleared.
canRedo	Signal<boolean>	Reactive signal indicating whether redo is available. Updates automatically when edits are made, undone, redone, or history is cleared.
clearHistory	() => void	Clear all undo/redo history.
getUndoStack	() => UndoRedoAction[]	Get a copy of the current undo stack.
getRedoStack	() => UndoRedoAction[]	Get a copy of the current redo stack.
recordEdit	(rowIndex: number, field: string, oldValue: unknown, newValue: unknown) => void	Manually record an edit action. If a transaction is active, the action is buffered; otherwise it’s pushed to the undo stack.
beginTransaction	() => void	Begin a transaction. All edits recorded until endTransaction() are grouped into a single compound action for undo/redo.
endTransaction	() => void	End the active transaction and push the compound action to the undo stack. If only one edit was recorded, it’s pushed as a plain EditAction. If no edits were recorded, the transaction is discarded.
isReady	Signal<boolean>	Signal indicating if grid is ready.

Property Details

canUndo

// In template:
// <button [disabled]="!undoRedo.canUndo()">Undo</button>

// In computed:
readonly undoAvailable = computed(() => this.undoRedo.canUndo());

---

canRedo

// In template:
// <button [disabled]="!undoRedo.canRedo()">Redo</button>

// In computed:
readonly redoAvailable = computed(() => this.undoRedo.canRedo());

---