Class JSUndoManager

constructor

• new JSUndoManager(options): JSUndoManager

• Parameters

  • options: JSUndoManagerOptions

  Returns JSUndoManager

limit

options

predefined

sp

stack

_keepLimit

• _keepLimit(): void

• Returns void

_rc

• _rc(command1): JSUndoManagerCommand1

• Parameters

  • command1: JSUndoManagerCommand1 | JSUndoManagerCommand2

  Returns JSUndoManagerCommand1

_rebase

• _rebase(): void

• Returns void

_record

• _record(command): void

• Parameters

  • command: JSUndoManagerCommand

  Returns void

bindHotKeys

• bindHotKeys(): JSUndoManager

• Bind 'undo' and 'redo' actions to 'Ctrl/Cmd+Z', 'Ctrl+Y' & 'Ctrl/Cmd+Shift+Z' hot keys. It is a basic implementation for quick testing and should be replaced with custom event handlers for more flexible processing.

  Returns JSUndoManager

canRedo

• canRedo(): boolean

• Check whether redoing command is possible

  Returns boolean

canUndo

• canUndo(): boolean

• Check whether undoing previous command is possible

  Returns boolean

execute

• execute(command1): JSUndoManager

• Execute function and record it with its opposite "undo" function

  Parameters

  • command1: JSUndoManagerCommand

    either an object with "redo" and "undo" functions

  Returns JSUndoManager

getSize

• getSize(): number

• Get number of commands in memory stack

  Returns number

isEmpty

• isEmpty(): boolean

• Check whether the commands stack is empty

  Returns boolean

isFull

• isFull(): boolean

• Check whether the commands stack size reaches its limit

  Returns boolean

log

• log(msg, ...args): void

• Parameters

  • msg: string

  • Rest ...args: any[]

  Returns void

record

• record(command): JSUndoManager

• Remember executed command containing "redo" and "undo" functions

  Parameters

  • command: JSUndoManagerCommand

    either an object with "redo" and "undo" functions

  Returns JSUndoManager

recordP

• recordP(type, data): JSUndoManager

• Parameters

  • type: string

  • data: any

  Returns JSUndoManager

redo

• redo(): JSUndoManager

• Redo the command which was previously undone

  Returns JSUndoManager

reset

• reset(): JSUndoManager

• Reset all commands from memory

  Returns JSUndoManager

setLimit

• setLimit(limit): JSUndoManager

• Change stack size limit initially defined in the constructor options

  Parameters

  • limit: number

  Returns JSUndoManager

undo

• undo(): JSUndoManager

• Undo previous command if possible

  Returns JSUndoManager