/**
* This method was created in VisualAge.
*
* @param action epics.undo.ActionObject
*/
public void addAction(ActionObject action) {
if (!monitor) return;
if (composedAction != null) {
composedAction.addAction(action);
// System.out.println("Composing: "+action.getDescription());
return;
}
if (actionsAfterSave >= 0 && actionsAfterSave <= bufferSize) {
actionsAfterSave++;
if (actionsAfterSave >= bufferSize) bufferSizeReached = true;
} else {
bufferSizeReached = true;
}
// System.out.println("New action: "+action.getDescription());
DsManager.getDrawingSurface(dsId).setModified(true);
if (pos == lowerbound) pos = last = increment(pos);
else {
pos = last = increment(pos);
if (last == first) first = increment(first); // lose first (the "oldest" action)
}
actions[pos] = action;
int np = increment(last); // clear lost actions -> finalization!
while (np != first) {
actions[np] = null;
np = increment(np);
}
updateMenuItems();
}
/** This method was created in VisualAge. */
public void undo() {
if (composedAction != null) {
Console.getInstance().println("Warning: UndoManager: undo(): macro action in progress.");
packComposedAction();
}
if (pos != lowerbound) {
boolean m = monitor;
monitor = false;
fireMacroActionStart();
actions[pos].undo();
fireMacroActionStop();
// System.out.println("Undo: "+actions[pos].getDescription());
pos = decrement(pos);
DsManager.getDrawingSurface(dsId).setModified(true);
updateMenuItems();
monitor = m;
setModification();
actionsAfterSave--;
}
}
/**
* Sets the modified tag according to the state of the opened template. If the template has (by
* undoing) became the same as the one that is saved tag is turned to false or else it is true.
*/
private void setModification() {
DsManager.getDrawingSurface(dsId).setModified(pos != savedOnPos || bufferSizeReached);
}