--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/source/ILineDiffer.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,92 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.text.source.ILineDiffer;
+
+import dwt.dwthelper.utils;
+
+import dwtx.jface.text.BadLocationException;
+
+
+/**
+ * Protocol that allows direct access to line information. Usually, implementations will also
+ * implement <code>IAnnotationModel</code>, which only allows <code>Iterator</code> based access
+ * to annotations.
+ * <p>
+ * <code>ILineDiffer</code> also allows to revert any lines to their original
+ * contents as defined by the quick diff reference used by the receiver.
+ * </p>
+ * <p>
+ * This interface may be implemented by clients.
+ * </p>
+ * <p>
+ * In order to provide backward compatibility for clients of <code>ILineDiffer</code>, extension
+ * interfaces are used to provide a means of evolution. The following extension interface
+ * exists:
+ * <ul>
+ * <li> {@link ILineDifferExtension} (since version 3.1): introducing the concept
+ *      suspending and resuming an <code>ILineDiffer</code>.</li>
+ * <li> {@link ILineDifferExtension2} (since version 3.3): allowing to query the suspension state
+ * of an <code>ILineDiffer</code>.</li>
+ * </ul>
+ * </p>
+ *
+ * @since 3.0
+ */
+public interface ILineDiffer {
+
+    /**
+     * Determines the line state for line <code>line</code> in the targeted document.
+     *
+     * @param line the line to get diff information for
+     * @return the line information object for <code>line</code> or <code>null</code> if none
+     */
+    ILineDiffInfo getLineInfo(int line);
+
+    /**
+     * Reverts a single changed line to its original state, not touching any lines that
+     * are deleted at its borders.
+     *
+     * @param line the line number of the line to be restored.
+     * @throws BadLocationException if <code>line</code> is out of bounds.
+     */
+    void revertLine(int line) throws BadLocationException;
+
+    /**
+     * Reverts a block of modified / added lines to their original state, including any deleted
+     * lines inside the block or at its borders. A block is considered to be a range of modified
+     * (e.g. changed, or added) lines.
+     *
+     * @param line any line in the block to be reverted.
+     * @throws BadLocationException if <code>line</code> is out of bounds.
+     */
+    void revertBlock(int line) throws BadLocationException;
+
+    /**
+     * Reverts a range of lines to their original state, including any deleted
+     * lines inside the block or at its borders.
+     *
+     * @param line any line in the block to be reverted.
+     * @param nLines the number of lines to be reverted, must be &gt; 0.
+     * @throws BadLocationException if <code>line</code> is out of bounds.
+     */
+    void revertSelection(int line, int nLines) throws BadLocationException;
+
+    /**
+     * Restores the deleted lines after <code>line</code>.
+     *
+     * @param line the deleted lines following this line number are restored.
+     * @return the number of restored lines.
+     * @throws BadLocationException if <code>line</code> is out of bounds.
+     */
+    int restoreAfterLine(int line) throws BadLocationException;
+}