1 files changed, 79 insertions, 0 deletions
diff --git a/org.eclipse.mylyn.commons.ui/src/org/eclipse/mylyn/commons/ui/SelectionProviderAdapter.java b/org.eclipse.mylyn.commons.ui/src/org/eclipse/mylyn/commons/ui/SelectionProviderAdapter.java
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+/*******************************************************************************
+ * Copyright (c) 2004, 2009 Tasktop Technologies and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Tasktop Technologies - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.mylyn.commons.ui;
+
+import org.eclipse.core.commands.common.EventManager;
+import org.eclipse.core.runtime.SafeRunner;
+import org.eclipse.jface.util.SafeRunnable;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.ISelectionChangedListener;
+import org.eclipse.jface.viewers.ISelectionProvider;
+import org.eclipse.jface.viewers.SelectionChangedEvent;
+
+/**
+ * Provides an simple implementation of {@link ISelectionProvider} that propagates selection events to registered
+ * listeners.
+ * 
+ * @author Steffen Pingel
+ * @since 3.7
+ */
+public class SelectionProviderAdapter extends EventManager implements ISelectionProvider, ISelectionChangedListener {
+
+	private ISelection selection;
+
+	/**
+	 * Constructs a <code>SelectionProviderAdapter</code> and initializes the selection to <code>selection</code>.
+	 * 
+	 * @param selection
+	 *            the initial selection
+	 * @see #setSelection(ISelection)
+	 */
+	public SelectionProviderAdapter(ISelection selection) {
+		setSelection(selection);
+	}
+
+	/**
+	 * Constructs a <code>SelectionProviderAdapter</code> with a <code>null</code> selection.
+	 */
+	public SelectionProviderAdapter() {
+	}
+
+	public void addSelectionChangedListener(ISelectionChangedListener listener) {
+		addListenerObject(listener);
+	}
+
+	public ISelection getSelection() {
+		return selection;
+	}
+
+	public void removeSelectionChangedListener(ISelectionChangedListener listener) {
+		removeListenerObject(listener);
+	}
+
+	public void selectionChanged(final SelectionChangedEvent event) {
+		this.selection = event.getSelection();
+		Object[] listeners = getListeners();
+		for (Object listener2 : listeners) {
+			final ISelectionChangedListener listener = (ISelectionChangedListener) listener2;
+			SafeRunner.run(new SafeRunnable() {
+				public void run() {
+					listener.selectionChanged(event);
+				}
+			});
+		}
+	}
+
+	public void setSelection(ISelection selection) {
+		selectionChanged(new SelectionChangedEvent(this, selection));
+	}
+
+}