1 files changed, 65 insertions, 0 deletions
diff --git a/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocumentManager.java b/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocumentManager.java
new file mode 100644
index 000000000..0d1c99590
--- /dev/null
+++ b/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/DocumentManager.java
@@ -0,0 +1,65 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2017 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.compare.internal;
+
+import java.util.ArrayList;
+
+import org.eclipse.jface.text.IDocument;
+
+/**
+ * No API yet.
+ */
+public class DocumentManager {
+
+	private static final boolean DEBUG= false;
+
+	private static ArrayList<Object> fgKeys= new ArrayList<>();
+	private static ArrayList<IDocument> fgValues= new ArrayList<>();
+
+	public static IDocument get(Object o) {
+
+		for (int i= 0; i < fgKeys.size(); i++) {
+			if (fgKeys.get(i) == o)
+				return fgValues.get(i);
+		}
+		return null;
+	}
+
+	public static void put(Object o, IDocument document) {
+		if (DEBUG) System.out.println("DocumentManager.put: " + document);	//$NON-NLS-1$
+		for (int i= 0; i < fgKeys.size(); i++) {
+			if (fgKeys.get(i) == o) {
+				fgValues.set(i, document);
+				return;
+			}
+		}
+		fgKeys.add(o);
+		fgValues.add(document);
+	}
+
+	public static void remove(IDocument document) {
+		if (document != null) {
+			if (DEBUG) System.out.println("DocumentManager.remove: " + document);	//$NON-NLS-1$
+			for (int i= 0; i < fgValues.size(); i++) {
+				if (fgValues.get(i) == document) {
+					fgKeys.remove(i);
+					fgValues.remove(i);
+					return;
+				}
+			}
+			if (DEBUG) System.out.println("DocumentManager.remove: not found");	//$NON-NLS-1$
+		}
+	}
+
+	public static void dump() {
+		if (DEBUG) System.out.println("DocumentManager: managed docs:" + fgValues.size());	//$NON-NLS-1$
+	}
+}