| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.myfaces.tobago.example.demo; |
| |
| import org.apache.myfaces.tobago.model.ExpandedState; |
| import org.apache.myfaces.tobago.model.SelectedState; |
| import org.apache.myfaces.tobago.model.TreePath; |
| import org.apache.myfaces.tobago.model.TreeState; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.annotation.PostConstruct; |
| import javax.enterprise.context.SessionScoped; |
| import javax.enterprise.event.Observes; |
| import javax.faces.context.FacesContext; |
| import javax.inject.Inject; |
| import javax.inject.Named; |
| import java.io.Serializable; |
| import java.lang.invoke.MethodHandles; |
| |
| @SessionScoped |
| @Named |
| public class NavigationState implements Serializable { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Inject |
| private NavigationTree tree; |
| |
| private NavigationNode currentNode; |
| |
| private TreeState state = new TreeState(new ExpandedState(1), new SelectedState()); |
| |
| private boolean viewSource = false; |
| |
| @PostConstruct |
| public void init() { |
| currentNode = tree.findByViewId(FacesContext.getCurrentInstance().getViewRoot().getViewId()); |
| initState(); |
| } |
| |
| private void initState() { |
| if (currentNode != null) { |
| final TreePath treePath = currentNode.getTreePath(); |
| state.getSelectedState().clearAndSelect(treePath); |
| if (!treePath.isRoot()) { |
| state.getExpandedState().collapseAllButRoot(); |
| state.getExpandedState().expand(treePath, true); |
| } |
| } |
| } |
| |
| public NavigationNode getCurrentNode() { |
| return currentNode; |
| } |
| |
| public String gotoFirst() { |
| return gotoNode(tree.getTree().getNextNode()) + "?faces-redirect=true"; // the first after the root node |
| } |
| |
| public String gotoPrevious() { |
| if (currentNode == null) { |
| return gotoFirst(); |
| } else { |
| final NavigationNode previousNode = currentNode.getPreviousNode(); |
| if (previousNode != null) { |
| return gotoNode(previousNode); |
| } else { |
| LOG.warn("Strange navigation behavior"); |
| return null; |
| } |
| } |
| } |
| |
| public String gotoNext() { |
| if (currentNode == null) { |
| return gotoFirst(); |
| } else { |
| final NavigationNode nextNode = currentNode.getNextNode(); |
| if (nextNode != null) { |
| return gotoNode(nextNode); |
| } else { |
| LOG.warn("Strange navigation behavior"); |
| return null; |
| } |
| } |
| } |
| |
| public String gotoNode(@Observes final NavigationNode node) { |
| if (node == null) { |
| return gotoFirst(); |
| } else { |
| if (!node.equals(currentNode)) { |
| currentNode = node; |
| LOG.info("Navigate to '" + currentNode.getOutcome() + "'"); |
| } |
| initState(); |
| return currentNode.getOutcome(); |
| } |
| } |
| |
| public boolean isFirst() { |
| if (currentNode == null) { |
| return false; |
| } |
| final NavigationNode previousNode = currentNode.getPreviousNode(); |
| return previousNode == null || previousNode.isRoot(); |
| } |
| |
| public boolean isLast() { |
| if (currentNode == null) { |
| return false; |
| } |
| final NavigationNode nextNode = currentNode.getNextNode(); |
| return nextNode == null; |
| } |
| |
| public TreeState getState() { |
| return state; |
| } |
| |
| public String toggleViewSource() { |
| viewSource = !viewSource; |
| return null; |
| } |
| |
| public boolean isViewSource() { |
| return viewSource; |
| } |
| |
| public void setViewSource(final boolean viewSource) { |
| this.viewSource = viewSource; |
| } |
| } |