| /******************************************************************************* |
| * Copyright (c) 2000, 2016 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Alexander Kurtakov - Bug 460858 |
| *******************************************************************************/ |
| package org.eclipse.help.internal.workingset; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.help.*; |
| import org.eclipse.help.internal.util.*; |
| import org.w3c.dom.*; |
| |
| /** |
| * Makes help resources adaptable and persistable |
| */ |
| public class AdaptableTopic extends AdaptableHelpResource { |
| /** |
| * Map of all topics with this topic as ancestor |
| */ |
| private Map<String, IHelpResource> topicMap; |
| |
| /** |
| * This constructor will be called when wrapping help resources. |
| */ |
| public AdaptableTopic(ITopic element) { |
| super(element); |
| } |
| |
| /** |
| * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class) |
| */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T getAdapter(Class<T> adapter) { |
| if (adapter == ITopic.class) |
| return (T) element; |
| return super.getAdapter(adapter); |
| } |
| |
| @Override |
| public AdaptableHelpResource[] getChildren() { |
| ITopic[] topics = this.getSubtopics(); |
| AdaptableHelpResource[] adaptableTopic = new AdaptableTopic[topics.length]; |
| for (int i = 0; i < topics.length; i++) { |
| adaptableTopic[i] = new AdaptableTopic(topics[i]); |
| } |
| return adaptableTopic; |
| } |
| |
| /** |
| * @see org.eclipse.help.ITopic#getSubtopics() |
| */ |
| public ITopic[] getSubtopics() { |
| return ((ITopic) element).getSubtopics(); |
| } |
| |
| /** |
| * Returns a topic with the specified href. <br> |
| * It is possible that multiple tocs have the same href, in which case there |
| * is no guarantee which one is returned. |
| * |
| * @param href |
| * The topic's href value. |
| */ |
| @Override |
| public ITopic getTopic(String href) { |
| if (href == null) |
| return null; |
| |
| if (topicMap == null) { |
| // traverse TOC and fill in the topicMap |
| topicMap = new HashMap<>(); |
| topicMap.put(getHref(), element); |
| FastStack<ITopic> stack = new FastStack<>(); |
| ITopic[] topics = getSubtopics(); |
| for (int i = 0; i < topics.length; i++) |
| stack.push(topics[i]); |
| while (!stack.isEmpty()) { |
| ITopic topic = stack.pop(); |
| if (topic != null) { |
| String topicHref = topic.getHref(); |
| if (topicHref != null) { |
| topicMap.put(topicHref, topic); |
| } |
| ITopic[] subtopics = topic.getSubtopics(); |
| for (int i = 0; i < subtopics.length; i++) |
| stack.push(subtopics[i]); |
| } |
| } |
| } |
| return (ITopic) topicMap.get(href); |
| } |
| |
| @Override |
| public void saveState(Element element) { |
| AdaptableToc toc = (AdaptableToc) getParent(); |
| toc.saveState(element); |
| AdaptableHelpResource[] topics = toc.getChildren(); |
| for (int i = 0; i < topics.length; i++) |
| if (topics[i] == this) |
| element.setAttribute("topic", String.valueOf(i)); //$NON-NLS-1$ |
| } |
| } |