core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/dialogs/PropertyLinkArea.java

package org.eclipse.dltk.ui.dialogs;

import java.util.Iterator;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.preference.IPreferenceNode;
import org.eclipse.jface.preference.PreferenceManager;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Link;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.internal.dialogs.PropertyPageContributorManager;
import org.eclipse.ui.internal.dialogs.PropertyPageManager;
import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;

public class PropertyLinkArea {

	private Link pageLink;
	private IAdaptable element;

	public PropertyLinkArea(Composite parent, int style, final String pageId,
			IAdaptable element, String message,
			final IWorkbenchPreferenceContainer pageContainer) {
		this.element = element;
		pageLink = new Link(parent, style);

		IPreferenceNode node = getPreferenceNode(pageId);
		String text = null;
		if (node == null) {
			text = NLS.bind(WorkbenchMessages.PreferenceNode_NotFound, pageId);
		} else {
			text = NLS.bind(message, node.getLabelText());
		}

		pageLink.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				pageContainer.openPage(pageId, null);
			}
		});

		pageLink.setText(text);
	}

	/**
	 * Returns the property link control
	 */
	public Control getControl() {
		return pageLink;
	}

	private IPreferenceNode getPreferenceNode(String pageId) {
		/*
		 * code pulled from org.eclipse.ui.internal.dialogs.PropertyDialog - i'm
		 * not sure why this type of class doesn't already exist for property
		 * pages like it does for preference pages since it seems it would be
		 * very useful - guess we're breaking new ground :)
		 */
		PropertyPageManager pageManager = new PropertyPageManager();
		PropertyPageContributorManager.getManager().contribute(pageManager,
				element);

		Iterator pages = pageManager.getElements(PreferenceManager.PRE_ORDER)
				.iterator();

		while (pages.hasNext()) {
			IPreferenceNode node = (IPreferenceNode) pages.next();
			if (node.getId().equals(pageId)) {
				return node;
			}
		}

		return null;
	}
}