Class UndoManager

constructor

• new UndoManager(): UndoManager

• Resets the current undo state and creates a new UndoManager.

  Returns UndoManager

$fromUndo

$keepRedoStack

$lastDelta

$maxRev

$redoStack

$redoStackBaseRev

$rev

$session

$undoDepth

$undoStack

hasRedo

hasUndo

isClean

lastDeltas

mark

markClean

selections

$prettyPrint

• $prettyPrint(delta): any

• Parameters

  • delta: Delta

  Returns any

$syncRev

• $syncRev(): void

• Returns void

add

• add(delta, allowMerge, session?): void

• Provides a means for implementing your own undo manager. options has one property, args, an [[Array Array]], with two elements:

  • args[0] is an array of deltas
  • args[1] is the document to associate with

  Parameters

  • delta: Delta

  • allowMerge: boolean

  • Optional session: EditSession

  Returns void

addSelection

• addSelection(selection, rev?): void

• Parameters

  • selection: any

  • Optional rev: number

  Returns void

addSession

• addSession(session): void

• Parameters

  • session: EditSession

  Returns void

bookmark

• bookmark(rev?): void

• Marks the current status clean

  Parameters

  • Optional rev: number

  Returns void

canRedo

• canRedo(): boolean

• Returns true if there are redo operations left to perform.

  Returns boolean

canUndo

• canUndo(): boolean

• Returns true if there are undo operations left to perform.

  Returns boolean

fromJSON

• fromJSON(json): void

• Takes in an object which was returned from the toJSON method above, and resets the current undoManager instance to use the previously exported instance state.

  Parameters

  • json: any

  Returns void

getChangedLines

• getChangedLines(from, to?): void

• Parameters

  • from: number

  • Optional to: number

  Returns void

getChangedRanges

• getChangedRanges(from, to?): void

• Parameters

  • from: number

  • Optional to: number

  Returns void

getDeltas

• getDeltas(from, to?): Delta[]

• Parameters

  • from: number

  • Optional to: number

  Returns Delta[]

getRevision

• getRevision(): number

• Returns number

getSelection

• getSelection(rev, after?): {
      rev: number;
      value: string;
  }

• Parameters

  • rev: number

  • Optional after: boolean

  Returns {
      rev: number;
      value: string;
  }

  • rev: number

  • value: string

isAtBookmark

• isAtBookmark(): boolean

• Returns if the current status is clean

  Returns boolean

markIgnored

• markIgnored(from, to?): void

• Parameters

  • from: number

  • Optional to: number

  Returns void

redo

• redo(session, dontSelect?): void

• [Perform a redo operation on the document, reimplementing the last change.]{: #UndoManager.redo}

  Parameters

  • session: EditSession

  • Optional dontSelect: boolean

    {:dontSelect}

  Returns void

reset

• reset(): void

• Destroys the stack of undo and redo redo operations.

  Returns void

startNewGroup

• startNewGroup(): any

• Returns any

toJSON

• toJSON(): any

• Returns an object which can be safely stringified into JSON

  Returns any

undo

• undo(session, dontSelect?): void

• [Perform an undo operation on the document, reverting the last change.]{: #UndoManager.undo}

  Parameters

  • session: EditSession

  • Optional dontSelect: boolean

    {:dontSelect}

  Returns void