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BlockSuite API Documentation / @blocksuite/store / Y / UndoManager

Class: UndoManager ​

Fires 'stack-item-added' event when a stack item was added to either the undo- or the redo-stack. You may store additional stack information via the metadata property on event.stackItem.meta (it is a Map of metadata properties). Fires 'stack-item-popped' event when a stack item was popped from either the undo- or the redo-stack. You may restore the saved stack information from event.stackItem.meta.

Extends ​

  • ObservableV2<object>

Constructors ​

new UndoManager() ​

new UndoManager(typeScope, options?): UndoManager

Parameters ​

• typeScope: AbstractType<any> | AbstractType<any>[]

Accepts either a single type, or an array of types

• options?: UndoManagerOptions

Returns ​

UndoManager

Overrides ​

ObservableV2<{ 'stack-item-added': (arg0: StackItemEvent, arg1: UndoManager) => void; 'stack-item-popped': (arg0: StackItemEvent, arg1: UndoManager) => void; 'stack-cleared': (arg0: { undoStackCleared: boolean; redoStackCleared: boolean; }) => void; 'stack-item-updated': (arg0: StackItemEvent, arg1: UndoManager) => void; }>.constructor

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:55

Properties ​

_observers ​

_observers: Map<string, Set<any>>

Some desc.

Inherited from ​

ObservableV2._observers

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:15

afterTransactionHandler() ​

afterTransactionHandler: (transaction) => void

Parameters ​

• transaction: Transaction

Returns ​

void

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:91

captureTimeout ​

captureTimeout: number

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:87

captureTransaction() ​

captureTransaction: (arg0) => boolean

Parameters ​

• arg0: Transaction

Returns ​

boolean

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:63

currStackItem ​

currStackItem: null | StackItem

The currently popped stack item if UndoManager.undoing or UndoManager.redoing

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:84

deleteFilter() ​

deleteFilter: (arg0) => boolean

Parameters ​

• arg0: Item

Returns ​

boolean

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:61

doc ​

doc: Doc

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:60

ignoreRemoteMapChanges ​

ignoreRemoteMapChanges: boolean

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:86

lastChange ​

lastChange: number

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:85

redoStack ​

redoStack: StackItem[]

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:71

redoing ​

redoing: boolean

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:78

scope ​

scope: AbstractType<any>[]

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:59

trackedOrigins ​

trackedOrigins: Set<any>

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:62

undoStack ​

undoStack: StackItem[]

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:67

undoing ​

undoing: boolean

Whether the client is currently undoing (calling UndoManager.undo)

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:77

Methods ​

addToScope() ​

addToScope(ytypes): void

Parameters ​

• ytypes: AbstractType<any> | AbstractType<any>[]

Returns ​

void

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:95

addTrackedOrigin() ​

addTrackedOrigin(origin): void

Parameters ​

• origin: any

Returns ​

void

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:99

canRedo() ​

canRedo(): boolean

Are redo steps available?

Returns ​

boolean

true if redo is possible

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:149

canUndo() ​

canUndo(): boolean

Are undo steps available?

Returns ​

boolean

true if undo is possible

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:143

clear() ​

clear(clearUndoStack?, clearRedoStack?): void

Parameters ​

• clearUndoStack?: boolean

• clearRedoStack?: boolean

Returns ​

void

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:104

destroy() ​

destroy(): void

Returns ​

void

Inherited from ​

ObservableV2.destroy

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:45

emit() ​

emit<NAME_3>(name, args): void

Emit a named event. All registered event listeners that listen to the specified name will receive the event.

Type parameters ​

• NAME_3 extends "stack-cleared" | "stack-item-added" | "stack-item-popped" | "stack-item-updated"

Parameters ​

• name: NAME_3

The event name.

• args: Parameters<object[NAME_3]>

The arguments that are applied to the event listener.

Returns ​

void

Inherited from ​

ObservableV2.emit

Todo ​

This should catch exceptions

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:44

off() ​

off<NAME_2>(name, f): void

Type parameters ​

• NAME_2 extends "stack-cleared" | "stack-item-added" | "stack-item-popped" | "stack-item-updated"

Parameters ​

• name: NAME_2

• f: object[NAME_2]

Returns ​

void

Inherited from ​

ObservableV2.off

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:33

on() ​

on<NAME>(name, f): object[NAME]

Type parameters ​

• NAME extends "stack-cleared" | "stack-item-added" | "stack-item-popped" | "stack-item-updated"

Parameters ​

• name: NAME

• f: object[NAME]

Returns ​

object[NAME]

Inherited from ​

ObservableV2.on

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:21

once() ​

once<NAME_1>(name, f): void

Type parameters ​

• NAME_1 extends "stack-cleared" | "stack-item-added" | "stack-item-popped" | "stack-item-updated"

Parameters ​

• name: NAME_1

• f: object[NAME_1]

Returns ​

void

Inherited from ​

ObservableV2.once

Source ​

node_modules/.pnpm/lib0@0.2.93/node_modules/lib0/observable.d.ts:27

redo() ​

redo(): null | StackItem

Redo last undo operation.

Returns ​

null | StackItem

Returns StackItem if a change was applied

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:137

removeTrackedOrigin() ​

removeTrackedOrigin(origin): void

Parameters ​

• origin: any

Returns ​

void

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:103

stopCapturing() ​

stopCapturing(): void

UndoManager merges Undo-StackItem if they are created within time-gap smaller than options.captureTimeout. Call um.stopCapturing() so that the next StackItem won't be merged.

Returns ​

void

Example ​

ts
// without stopCapturing
    ytext.insert(0, 'a')
    ytext.insert(1, 'b')
    um.undo()
    ytext.toString() // => '' (note that 'ab' was removed)
    // with stopCapturing
    ytext.insert(0, 'a')
    um.stopCapturing()
    ytext.insert(0, 'b')
    um.undo()
    ytext.toString() // => 'a' (note that only 'b' was removed)

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:125

undo() ​

undo(): null | StackItem

Undo last changes on type.

Returns ​

null | StackItem

Returns StackItem if a change was applied

Source ​

node_modules/.pnpm/yjs@13.6.15/node_modules/yjs/dist/src/utils/UndoManager.d.ts:131

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