Documentation

public interface Operation

This interface represents a set of changes made to a Program

• Author: groomblecom
• See also: Program#addQueuedOperation(Operation)

public boolean perform(Program p, LinkedList<Command> c)

Performs some operation on a program without causing 100s of redraw and resimulate events. It is assumed that it starts with the program in a valid state and leaves it in a valid state.

• Parameters:
• p — the program to operate on
• c — the modifiable command list to operate on
• Returns: whether the operation was successful.

public boolean isUndoPoint()

Checks if this Operation is sufficiently important to cause a savepoint

• Returns: true if CTRL+Z should undo this operation by itself, or false if it is a minor operation which should be undone with other operations to prevent huge undo queues.