Variable HistoryConst

Type Declaration

• canRedo: (h: EditHistory) => boolean

  Checks if redo is available (there are undone commands).

• canUndo: (h: EditHistory) => boolean

  Checks if undo is available (there are commands to undo).

• redo: (h: EditHistory) => { command: EditCommand; history: EditHistory } | null

  Redoes a previously undone command.

• undo: (h: EditHistory) => { command: EditCommand; history: EditHistory } | null

  Undoes the last command, returning it along with updated history.

• create: function

  • create(maxSize?: number): EditHistory

    Creates a new empty edit history.

    Parameters

    • maxSize: number = 1000

      Maximum number of commands to retain (default: 1000).

    Returns EditHistory

• push: function

  • push(history: EditHistory, cmd: EditCommand): EditHistory

    Pushes a new command to history, removing any redo-able commands.

    Parameters

    • history: EditHistory

      Current history state.

    • cmd: EditCommand

      The command to add.

    Returns EditHistory

    New history state with the command added.