+ * This class may be instantiated; it is not intended to be subclassed.
+ * The base implementation of MultiPageEditor.init creates
+ * an instance of this class.
+ *
ISelectionChangedListener).
+ */
+ private final ListenerList listeners = new ListenerList();
+
+ /**
+ * Registered post selection changed listeners.
+ */
+ private final ListenerList postListeners = new ListenerList();
+
+ /**
+ * The multi-page editor.
+ */
+ private final TabbedPropertyPage multiPageEditor;
+
+ /**
+ * Creates a selection provider for the given multi-page editor.
+ *
+ * @param multiPageEditor the multi-page editor
+ */
+ public TabbedPageSelectionProvider(TabbedPropertyPage multiPageEditor) {
+ Assert.isNotNull(multiPageEditor);
+ this.multiPageEditor = multiPageEditor;
+ }
+
+ /* (non-Javadoc)
+ * Method declared on ISelectionProvider.
+ */
+ public void addSelectionChangedListener(ISelectionChangedListener listener) {
+ listeners.add(listener);
+ }
+
+ /**
+ * Adds a listener for post selection changes in this multi page selection provider.
+ *
+ * @param listener a selection changed listener
+ * @since 3.2
+ */
+ public void addPostSelectionChangedListener(ISelectionChangedListener listener) {
+ postListeners.add(listener);
+ }
+
+ /**
+ * Notifies all registered selection changed listeners that the editor's
+ * selection has changed. Only listeners registered at the time this method is
+ * called are notified.
+ *
+ * @param event the selection changed event
+ */
+ public void fireSelectionChanged(final SelectionChangedEvent event) {
+ Object[] listeners = this.listeners.getListeners();
+ fireEventChange(event, listeners);
+ }
+
+ /**
+ * Notifies all post selection changed listeners that the editor's
+ * selection has changed.
+ *
+ * @param event the event to propogate.
+ * @since 3.2
+ */
+ public void firePostSelectionChanged(final SelectionChangedEvent event) {
+ Object[] listeners = postListeners.getListeners();
+ fireEventChange(event, listeners);
+ }
+
+ private void fireEventChange(final SelectionChangedEvent event, Object[] listeners) {
+ for (int i = 0; i < listeners.length; ++i) {
+ final ISelectionChangedListener l = (ISelectionChangedListener) listeners[i];
+ SafeRunner.run(new SafeRunnable() {
+ public void run() {
+ l.selectionChanged(event);
+ }
+ });
+ }
+ }
+
+ /**
+ * Returns the multi-page editor.
+ * @return the multi-page editor.
+ */
+ public TabbedPropertyPage getMultiPageEditor() {
+ return multiPageEditor;
+ }
+
+ /* (non-Javadoc)
+ * Method declared on ISelectionProvider.
+ */
+ public ISelection getSelection() {
+ IEditorPart activeEditor = multiPageEditor.getActiveEditor();
+ if (activeEditor != null) {
+ ISelectionProvider selectionProvider = activeEditor.getSite()
+ .getSelectionProvider();
+ if (selectionProvider != null) {
+ return selectionProvider.getSelection();
+ }
+ }
+ return StructuredSelection.EMPTY;
+ }
+
+ /* (non-JavaDoc)
+ * Method declaed on ISelectionProvider.
+ */
+ public void removeSelectionChangedListener(
+ ISelectionChangedListener listener) {
+ listeners.remove(listener);
+ }
+
+ /**
+ * Removes a listener for post selection changes in this multi page selection provider.
+ *
+ * @param listener a selection changed listener
+ * @since 3.2
+ */
+ public void removePostSelectionChangedListener(ISelectionChangedListener listener) {
+ postListeners.remove(listener);
+ }
+
+ /* (non-Javadoc)
+ * Method declared on ISelectionProvider.
+ */
+ public void setSelection(ISelection selection) {
+ IEditorPart activeEditor = multiPageEditor.getActiveEditor();
+ if (activeEditor != null) {
+ ISelectionProvider selectionProvider = activeEditor.getSite()
+ .getSelectionProvider();
+ if (selectionProvider != null) {
+ selectionProvider.setSelection(selection);
+ }
+ }
+ }
+}