UndoStorage
Document Solutions Image Viewer - v7.2.0 / UndoStorage
Class: UndoStorage
Command based undo state storage.
Implements
Table of contents
Methods
Accessors
Methods
applyOptions
▸ applyOptions(options): void
Apply undo storage options.
Parameters
| Name | Type |
|---|---|
options |
ViewerOptions |
Returns
void
Implementation of
dispose
▸ dispose(): void
Dispose undo storage.
Returns
void
Implementation of
clear
▸ clear(): void
Clear undo storage.
Returns
void
Implementation of
isCommandSupported
▸ isCommandSupported(command): boolean
Gets a value indicating whether the command specified in the command parameter is supported.
Parameters
| Name | Type |
|---|---|
command |
UndoCommandSupport |
Returns
boolean
Implementation of
IUndoStorage.isCommandSupported
execute
▸ execute(command): Promise<void>
Execute a new command.
Parameters
| Name | Type | Description |
|---|---|---|
command |
UndoCommandSupport |
Instance of a command. |
Returns
Promise<void>
Implementation of
onCommandExecuted
▸ onCommandExecuted(command): void
Called after command action has been executed.
Parameters
| Name | Type |
|---|---|
command |
UndoCommandSupport |
Returns
void
Implementation of
IUndoStorage.onCommandExecuted
undo
▸ undo(): Promise<void>
Undo last action.
Returns
Promise<void>
Implementation of
redo
▸ redo(): Promise<void>
Redo next action.
Returns
Promise<void>
Implementation of
Accessors
hasUndo
• get hasUndo(): boolean
Gets a value indicating whether the undo storage can undo changes.
Returns
boolean
Implementation of
IUndoStorage.hasUndo
hasRedo
• get hasRedo(): boolean
Gets a value indicating whether the undo storage can redo changes.
Returns
boolean
Implementation of
IUndoStorage.hasRedo
undoIndex
• get undoIndex(): number
Gets current undo level index.
Returns
number
Implementation of
IUndoStorage.undoIndex
undoCount
• get undoCount(): number
Gets total undo levels count.
Returns
number
Implementation of
IUndoStorage.undoCount
undoInProgress
• get undoInProgress(): boolean
Gets a flag indicating whether an undo/redo or execute operation is in progress.
Returns
boolean
Implementation of
IUndoStorage.undoInProgress