1 files changed, 134 insertions, 0 deletions
diff --git a/org.eclipse.help.ui/src/org/eclipse/help/ui/internal/views/IndexPart.java b/org.eclipse.help.ui/src/org/eclipse/help/ui/internal/views/IndexPart.java
new file mode 100644
index 000000000..ed7ae4c14
--- /dev/null
+++ b/org.eclipse.help.ui/src/org/eclipse/help/ui/internal/views/IndexPart.java
@@ -0,0 +1,134 @@
+/*******************************************************************************
+ * Copyright (c) 2006 Intel Corporation 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:
+ *     Intel Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.help.ui.internal.views;
+
+import org.eclipse.help.HelpSystem;
+import org.eclipse.help.IHelpResource;
+import org.eclipse.help.IIndexEntry;
+import org.eclipse.help.ui.internal.IHelpUIConstants;
+import org.eclipse.jface.action.IToolBarManager;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.LabelProvider;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.ui.IMemento;
+import org.eclipse.ui.forms.widgets.FormToolkit;
+
+public class IndexPart extends HyperlinkTreePart implements IHelpUIConstants {
+
+	class IndexProvider implements ITreeContentProvider {
+		public Object[] getChildren(Object parentElement) {
+			if (parentElement == IndexPart.this) {
+				return HelpSystem.getIndex().getEntries();
+			}
+			if (parentElement instanceof IIndexEntry) {
+				return IndexPart.this.getChildren((IIndexEntry) parentElement);
+			}
+			return new Object[0];
+		}
+
+		public Object getParent(Object element) {
+			return null;
+		}
+
+		public boolean hasChildren(Object element) {
+			return getChildren(element).length > 0;
+		}
+
+		public Object[] getElements(Object inputElement) {
+			return getChildren(inputElement);
+		}
+
+		public void dispose() {}
+		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}
+	}
+
+	class IndexLabelProvider extends LabelProvider {
+		public String getText(Object obj) {
+			if (obj instanceof IIndexEntry)
+				return ((IIndexEntry) obj).getKeyword();
+			if (obj instanceof IHelpResource)
+				return ((IHelpResource) obj).getLabel();
+			return super.getText(obj);
+		}
+
+		public Image getImage(Object obj) {
+			return super.getImage(obj);
+		}
+	}
+
+	public IndexPart(Composite parent, FormToolkit toolkit, IToolBarManager tbm) {
+		super(parent, toolkit, tbm);
+	}
+
+	protected void configureTreeViewer() {
+		treeViewer.setContentProvider(new IndexProvider());
+		treeViewer.setLabelProvider(new IndexLabelProvider());
+	}
+
+	protected void doOpen(Object obj) {
+		if (obj instanceof IHelpResource) {
+			parent.showURL(((IHelpResource) obj).getHref());
+		} else if (obj instanceof IIndexEntry) {
+			IIndexEntry entry = (IIndexEntry) obj;
+			if (getChildren(entry).length > 0) {
+				treeViewer.setExpandedState(obj, !treeViewer.getExpandedState(obj));
+			}
+			IHelpResource[] topics = entry.getTopics();
+			if (topics.length == 1) {
+				parent.showURL(topics[0].getHref());
+			}
+		}
+	}
+
+	protected boolean canAddBookmarks() {
+		return true;
+	}
+
+	public void saveState(IMemento memento) {
+	}
+
+	public void toggleRoleFilter() {
+	}
+
+	public void refilter() {
+	}
+
+	private Object[] getChildren(IIndexEntry entry) {
+		/*
+		 * Index entry has two types of children: topics and subentries.
+		 * 
+		 * The method returns topics among children only if number of the topics
+		 * more than 1.
+		 * 
+		 * In case when the entry owns only one topic, this topic is not returned
+		 * as child because the entry will represent this topic by its keyword.
+		 */
+		IHelpResource[] topics = entry.getTopics();
+		IIndexEntry[] subentries = entry.getSubentries();
+
+		if (topics.length <= 1) {
+			return subentries;
+		}
+
+		Object[] childrens = new Object[topics.length + subentries.length];
+		System.arraycopy(topics, 0, childrens, 0, topics.length);
+		System.arraycopy(subentries, 0, childrens, topics.length, subentries.length);
+
+		return childrens; 
+	}
+
+	protected Tree getTreeWidget() {
+		return treeViewer.getTree();
+	}
+}