--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/internal/GeneratePatchInspector.java	Fri Feb 15 16:48:54 2013 +0100
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2013 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.internal;
+
+import org.tmatesoft.hg.internal.PatchGenerator.DeltaInspector;
+import org.tmatesoft.hg.internal.PatchGenerator.LineSequence;
+
+class GeneratePatchInspector extends DeltaInspector<LineSequence> {
+	private final Patch deltaCollector;
+	
+	GeneratePatchInspector(Patch p) {
+		assert p != null;
+		deltaCollector = p;
+	}
+	
+	public static Patch delta(byte[] prev, byte[] content) {
+		Patch rv = new Patch();
+		PatchGenerator<LineSequence> pg = new PatchGenerator<LineSequence>();
+		pg.init(new LineSequence(prev).splitByNewlines(), new LineSequence(content).splitByNewlines());
+		pg.findMatchingBlocks(new GeneratePatchInspector(rv));
+		return rv;
+	}
+
+	@Override
+	protected void changed(int s1From, int s1To, int s2From, int s2To) {
+		int from = seq1.chunk(s1From).getOffset();
+		int to = seq1.chunk(s1To).getOffset();
+		byte[] data = seq2.data(s2From, s2To);
+		deltaCollector.add(from, to, data);
+	}
+	
+	@Override
+	protected void deleted(int s2DeletionPoint, int s1From, int s1To) {
+		int from = seq1.chunk(s1From).getOffset();
+		int to = seq1.chunk(s1To).getOffset();
+		deltaCollector.add(from, to, new byte[0]);
+	}
+	
+	@Override
+	protected void added(int s1InsertPoint, int s2From, int s2To) {
+		int insPoint = seq1.chunk(s1InsertPoint).getOffset();
+		byte[] data = seq2.data(s2From, s2To);
+		deltaCollector.add(insPoint, insPoint, data);
+	}
+}
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