/*******************************************************************************
 * Copyright (c) 2004, 2005 Sybase, Inc. 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:
 *     Sybase, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.jst.jsf.facesconfig.ui.pageflow.properties;

import java.util.List;

import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.IFilter;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.editpart.PageflowElementEditPart;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.editpart.PageflowElementTreeEditPart;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.editpart.PageflowLinkEditPart;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.PageflowLink;
import org.eclipse.jst.jsf.facesconfig.ui.pageflow.util.PageflowValidation;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.views.properties.tabbed.ISection;
import org.eclipse.ui.views.properties.tabbed.ISectionDescriptor;

/**
 * This class defines the section descriptor for pageflow attributes. Following
 * is the typical function of SectionDescriptor for tabbed property views. 1. In
 * tabbed property view, there are multiple sections, one or more than one
 * sections can be composed of one tab. 2. Each of section has an ID, and their
 * relationship is defined by the function "getAfterSection". 3. Not all
 * sections are enabled always. They are enabled according to current
 * WorkbenchPart and selection, which is defined in function "appliesTo".
 * 
 * @author Xiao-guang Zhang
 */
public class GeneralViewSectionDescriptor implements ISectionDescriptor {

	/*
	 * (non-Javadoc)
	 * 
	 * @see ISectionDescriptor#getId()
	 */
	public String getId() {
		return ITabbedPropertiesConstants.GENERAL_TAB_ID;
	}


	/*
	 * (non-Javadoc)
	 * 
	 * @see ISectionDescriptor#getInputTypes()
	 */
	public List getInputTypes() {
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see ISectionDescriptor#getSectionClass()
	 */
	public ISection getSectionClass() {
		return new GeneralViewSection();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.ibm.xtools.common.ui.properties.ISectionDescriptor#getTargetTab()
	 */
	public String getTargetTab() {
		return ITabbedPropertiesConstants.GENERAL_TAB_ID;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see ISectionDescriptor#appliesTo(IWorkbenchPart, ISelection)
	 */
	public boolean appliesTo(IWorkbenchPart part, ISelection selection) {
		Object object = null;
		// FIXME: Should move the appliesTo to differnt page of
		// MultiPageEditorPart.
		if (selection instanceof StructuredSelection) {
			StructuredSelection structuredSelection = (StructuredSelection) selection;
			object = structuredSelection.getFirstElement();
			// The general tab will be shown for only pageflow element and
			// pageflow link editparts
			if (object instanceof PageflowElementEditPart
					|| object instanceof PageflowElementTreeEditPart) {
				return true;
			} else if (object instanceof PageflowLinkEditPart) {
				PageflowLink pfLink = (PageflowLink) ((PageflowLinkEditPart) object)
						.getModel();
				if (PageflowValidation.getInstance().isValidLinkForProperty(
						pfLink)) {
					return true;
				}
			} else {
				return true;
			}
		} else if (selection instanceof ITextSelection) {
			return true;
		}

		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see ISectionDescriptor#getAfterSection()
	 */
	public String getAfterSection() {
		return ""; //$NON-NLS-1$
	}

	public int getEnablesFor() {
		return ENABLES_FOR_ANY;
	}


	public IFilter getFilter() {
		// TODO Auto-generated method stub
		return null;
	}
}