Constructor Detail

• History

  public History()

  New unlimited history list.

• History

  public History(int max_size)

Method Detail

• add

  public List<History.Step<?>> add(History.Step<?> step)

  Append a new step. If max_size is set, resizes the list if larger than max_size, and returns all removed elements. Otherwise returns an empty list.

• append

  public List<History.Step<?>> append(History.Step<?> step)

  Appends a step at the end of the list, without modifying the current index. If max_size is set, resizes the list if larger than max_size.

• getCurrent

  public History.Step<?> getCurrent()

• undoOneStep

  public History.Step<?> undoOneStep()

  Returns null if there aren't any more steps to undo.

• redoOneStep

  public History.Step<?> redoOneStep()

  Returns null if there aren't any more steps to redo.

• remove

  public List<?> remove(long id)

  Empty all elements from each Step in the list that match the given id, and return them.

• resize

  public List<History.Step<?>> resize(int size)

  Resize to maximum the given size, removing from the beginning. Returns all removed elements, or an empty list if none.

• clear

  public List<History.Step<?>> clear()

  Remove all steps from the list and return them.

• getAll

  public List<History.Step<?>> getAll()

  Returns a list with all undo steps.

• get

  public History.Step<?> get(int i)

• clip

  public List<History.Step<?>> clip()

  Cut the list after the index, leaving from 0 to index, inclusive, inside. Returns removed steps.

• size

  public int size()

• index

  public int index()

• indexAtStart

  public boolean indexAtStart()

• indexAtEnd

  public boolean indexAtEnd()

• canUndo

  public boolean canUndo()

• canRedo

  public boolean canRedo()