/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.cms.ui.workbench.internal.jcr.parts;
  
  import javax.jcr.Node;
  
  import org.argeo.cms.ui.jcr.JcrTreeContentProvider;
  import org.argeo.cms.ui.jcr.NodeLabelProvider;
  import org.argeo.cms.ui.workbench.WorkbenchUiPlugin;
  import org.argeo.cms.ui.workbench.jcr.DefaultNodeEditor;
  import org.argeo.eclipse.ui.EclipseUiException;
  import org.argeo.eclipse.ui.EclipseUiUtils;
  import org.eclipse.jface.viewers.DoubleClickEvent;
  import org.eclipse.jface.viewers.IDoubleClickListener;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.jface.viewers.ITreeContentProvider;
  import org.eclipse.jface.viewers.TreeViewer;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Tree;
  import org.eclipse.ui.PartInitException;
  import org.eclipse.ui.forms.IManagedForm;
  import org.eclipse.ui.forms.editor.FormEditor;
  import org.eclipse.ui.forms.editor.FormPage;
  import org.eclipse.ui.forms.widgets.ScrolledForm;
  
  /** List all children of the current node */
  public class ChildNodesPage extends FormPage {
  	// private final static Log log = LogFactory.getLog(ChildNodesPage.class);
  
  	private Node currentNode;
  
  	private JcrTreeContentProvider nodeContentProvider;
  	private TreeViewer nodesViewer;
  
  	public ChildNodesPage(FormEditor editor, String title, Node currentNode) {
  		super(editor, "ChildNodesPage", title);
  		this.currentNode = currentNode;
  	}
  
  	protected void createFormContent(IManagedForm managedForm) {
  		try {
  			ScrolledForm form = managedForm.getForm();
  			form.setText(WorkbenchUiPlugin.getMessage("childNodesPageTitle"));
  			Composite innerBox = form.getBody();
  			// Composite innerBox = new Composite(body, SWT.NO_FOCUS);
  			GridLayout twt = new GridLayout(1, false);
  			twt.marginWidth = twt.marginHeight = 5;
  			innerBox.setLayout(twt);
  			if (!currentNode.hasNodes()) {
  				managedForm.getToolkit().createLabel(innerBox, WorkbenchUiPlugin.getMessage("warningNoChildNode"));
  			} else {
  				nodeContentProvider = new JcrTreeContentProvider();
  				nodesViewer = createNodeViewer(innerBox, nodeContentProvider);
  				nodesViewer.setInput(currentNode);
  			}
  		} catch (Exception e) {
  			throw new EclipseUiException("Cannot create children page for " + currentNode, e);
  		}
  	}
  
  	protected TreeViewer createNodeViewer(Composite parent, final ITreeContentProvider nodeContentProvider) {
  
  		final TreeViewer tmpNodeViewer = new TreeViewer(parent, SWT.BORDER);
  		Tree tree = tmpNodeViewer.getTree();
  		tree.setLinesVisible(true);
  		tmpNodeViewer.getTree().setLayoutData(EclipseUiUtils.fillAll());
  		tmpNodeViewer.setContentProvider(nodeContentProvider);
  		tmpNodeViewer.setLabelProvider(new NodeLabelProvider());
  		tmpNodeViewer.addDoubleClickListener(new DClickListener());
  		return tmpNodeViewer;
  	}
  
  	public class DClickListener implements IDoubleClickListener {
  
  		public void doubleClick(DoubleClickEvent event) {
  			if (event.getSelection() == null || event.getSelection().isEmpty())
  				return;
  			Object obj = ((IStructuredSelection) event.getSelection()).getFirstElement();
  			if (obj instanceof Node) {
  				Node node = (Node) obj;
  				try {
  					GenericNodeEditorInput gnei = new GenericNodeEditorInput(node);
  					WorkbenchUiPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getActivePage()
  							.openEditor(gnei, DefaultNodeEditor.ID);
 				} catch (PartInitException pie) {
 					throw new EclipseUiException("Cannot open editor for " + node, pie);
 				}
 			}
 		}
 	}
 }