UndoStorage
Class: UndoStorage
Command based undo state storage.
Implements
Accessors
hasRedo
Get Signature
get hasRedo(): boolean;
Gets a value indicating whether the undo storage can redo changes.
Returns
boolean
Implementation of
hasUndo
Get Signature
get hasUndo(): boolean;
Gets a value indicating whether the undo storage can undo changes.
Returns
boolean
Implementation of
undoCount
Get Signature
get undoCount(): number;
Gets total undo levels count.
Returns
number
Implementation of
undoIndex
Get Signature
get undoIndex(): number;
Gets current undo level index.
Returns
number
Implementation of
undoInProgress
Get Signature
get undoInProgress(): boolean;
Gets a flag indicating whether an undo/redo or execute operation is in progress.
Returns
boolean
Implementation of
Methods
applyOptions()
applyOptions(options): void;
Apply undo storage options.
Parameters
options
Returns
void
Implementation of
clear()
clear(): void;
Clear undo storage.
Returns
void
Implementation of
dispose()
dispose(): void;
Dispose undo storage.
Returns
void
Implementation of
execute()
execute(command): Promise<void>;
Execute a new command.
Parameters
command
Instance of a command.
Returns
Promise<void>
Implementation of
isCommandSupported()
isCommandSupported(command): boolean;
Gets a value indicating whether the command specified in the command parameter is supported.
Parameters
command
Returns
boolean
Implementation of
IUndoStorage.isCommandSupported
onCommandExecuted()
onCommandExecuted(command): void;
Called after command action has been executed.
Parameters
command
Returns
void
Implementation of
IUndoStorage.onCommandExecuted
redo()
redo(): Promise<void>;
Redo next action.
Returns
Promise<void>
Implementation of
undo()
undo(): Promise<void>;
Undo last action.
Returns
Promise<void>