/**
* Save the most-recently-used history in the given memento.
*
* @param memento the memento to save the mru history in
*/
public IStatus saveState(IMemento memento) {
Iterator iterator = fifoList.iterator();
while (iterator.hasNext()) {
EditorHistoryItem item = (EditorHistoryItem) iterator.next();
if (item.canSave()) {
IMemento itemMemento = memento.createChild(IWorkbenchConstants.TAG_FILE);
item.saveState(itemMemento);
}
}
return Status.OK_STATUS;
}
/**
* Restore the most-recently-used history from the given memento.
*
* @param memento the memento to restore the mru history from
*/
public IStatus restoreState(IMemento memento) {
IMemento[] mementos = memento.getChildren(IWorkbenchConstants.TAG_FILE);
for (int i = 0; i < mementos.length; i++) {
EditorHistoryItem item = new EditorHistoryItem(mementos[i]);
if (!"".equals(item.getName())
|| !"".equals(item.getToolTipText())) { // $NON-NLS-1$ //$NON-NLS-2$
add(item, fifoList.size());
}
}
return Status.OK_STATUS;
}
/** Removes all traces of an editor input from the history. */
public void remove(IEditorInput input) {
if (input == null) {
return;
}
Iterator iter = fifoList.iterator();
while (iter.hasNext()) {
EditorHistoryItem item = (EditorHistoryItem) iter.next();
if (item.matches(input)) {
iter.remove();
}
}
}
/** Refresh the editor list. Any stale items are removed. Only restored items are considered. */
public void refresh() {
Iterator iter = fifoList.iterator();
while (iter.hasNext()) {
EditorHistoryItem item = (EditorHistoryItem) iter.next();
if (item.isRestored()) {
IEditorInput input = item.getInput();
if (input != null && !input.exists()) {
iter.remove();
}
}
}
}
/** Adds an item to the history. */
private void add(EditorHistoryItem newItem, int index) {
// Remove the item if it already exists so that it will be put
// at the top of the list.
if (newItem.isRestored()) {
remove(newItem.getInput());
}
// Remove the oldest one
if (fifoList.size() == MAX_SIZE) {
fifoList.remove(MAX_SIZE - 1);
}
// Add the new item.
fifoList.add(index < MAX_SIZE ? index : MAX_SIZE - 1, newItem);
}