1 files changed, 99 insertions, 0 deletions
diff --git a/org.eclipse.help.webapp/src/org/eclipse/help/internal/webapp/data/EnabledTopicUtils.java b/org.eclipse.help.webapp/src/org/eclipse/help/internal/webapp/data/EnabledTopicUtils.java
new file mode 100644
index 000000000..761181434
--- /dev/null
+++ b/org.eclipse.help.webapp/src/org/eclipse/help/internal/webapp/data/EnabledTopicUtils.java
@@ -0,0 +1,99 @@
+/*******************************************************************************
+ * Copyright (c) 2007 IBM 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.help.internal.webapp.data;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.help.IIndexEntry;
+import org.eclipse.help.ITopic;
+import org.eclipse.help.UAContentFilter;
+import org.eclipse.help.internal.base.HelpBasePlugin;
+import org.eclipse.help.internal.base.HelpEvaluationContext;
+
+/**
+ * Utilities to test for enabled topics, index entries etc. 
+ */
+
+public class EnabledTopicUtils {
+
+	/**
+	 * Test whether a topic is enabled
+	 * @param topic
+	 * @return
+	 */
+	public static boolean isEnabled(ITopic topic) {
+		if (UAContentFilter.isFiltered(topic, HelpEvaluationContext.getContext())) {
+			return false;
+		}
+		return HelpBasePlugin.getActivitySupport().isEnabled(topic.getHref());
+	}
+	
+	/**
+	 * Test whether an entry is enabled
+	 * @param entry
+	 * @return
+	 */
+	public static boolean isEnabled(IIndexEntry entry) {
+		if (UAContentFilter.isFiltered(entry, HelpEvaluationContext.getContext())) {
+			return false;
+		}
+		ITopic[] topics = entry.getTopics();
+		for (int i=0;i<topics.length;++i) {
+			if (EnabledTopicUtils.isEnabled(topics[i])) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Filter out any disabled entries from an array
+	 * @param entries an array of entries
+	 * @return an array containing only those entries which are enabled
+	 */
+	public static IIndexEntry[] getEnabled(IIndexEntry[] entries) {
+		for (int i=0;i<entries.length;++i) {
+			if (!isEnabled(entries[i])) {
+				List list = new ArrayList(entries.length);
+				for (int j=0;j<entries.length;++j) {
+					if (j < i || isEnabled(entries[j])) {
+						list.add(entries[j]);
+					}
+				}
+				return (IIndexEntry[])list.toArray(new IIndexEntry[list.size()]);
+			}
+		}
+		return entries;
+	}
+
+	/**
+	 * Filter out any disable topics form an array
+	 * @param topics an array of topics
+	 * @return an array containing only those topics which are enabled
+	 */
+	public static ITopic[] getEnabled(ITopic[] topics) {
+		for (int i=0;i<topics.length;++i) {
+			if (!isEnabled(topics[i])) {
+				List list = new ArrayList(topics.length);
+				for (int j=0;j<topics.length;++j) {
+					if (j < i || isEnabled(topics[j])) {
+						list.add(topics[j]);
+					}
+				}
+				return (ITopic[])list.toArray(new ITopic[list.size()]);
+			}
+		}
+		return topics;
+	}
+
+}