/*******************************************************************************
* Copyright (c) 2012 xored software, Inc. 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:
* xored software, Inc. - initial API and implementation (Yuri Strot)
******************************************************************************/
package com.xored.glance.ui.viewers.utils;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TypedListener;
import java.lang.reflect.Field;
public class ViewerUtils {
public static ITextViewer getTextViewer(StyledText text) {
return getViewer(ITextViewer.class, text, SWT.Selection);
}
public static TreeViewer getTreeViewer(Tree tree) {
return getViewer(TreeViewer.class, tree, SWT.Expand);
}
private static <T> T getViewer(Class<T> clazz, Control control, int event) {
Listener[] listeners = control.getListeners(event);
for (Listener listener : listeners) {
Object lookFor = listener;
if (listener instanceof TypedListener) {
lookFor = ((TypedListener) listener).getEventListener();
}
try {
Field this$0 = lookFor.getClass().getDeclaredField("this$0");
this$0.setAccessible(true);
Object viewer = this$0.get(lookFor);
if (clazz.isInstance(viewer)) {
return clazz.cast(viewer);
}
} catch (Exception e) {
// ignore exceptions
}
}
return null;
}
}