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annotate src/org/tmatesoft/hg/internal/GeneratePatchInspector.java @ 703:7839ff0bfd78

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Refactor: move diff/blame related code to a separate package
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 14 Aug 2013 14:51:51 +0200
parents 4ea0351ca878
children
rev   line source
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import org.tmatesoft.hg.internal.diff.DiffHelper;
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20 import org.tmatesoft.hg.internal.diff.DiffHelper.DeltaInspector;
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21 import org.tmatesoft.hg.internal.diff.DiffHelper.LineSequence;
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22
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23 class GeneratePatchInspector extends DeltaInspector<LineSequence> {
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24 private final Patch deltaCollector;
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25
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26 GeneratePatchInspector(Patch p) {
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27 assert p != null;
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28 deltaCollector = p;
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29 }
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30
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31 public static Patch delta(byte[] prev, byte[] content) {
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32 Patch rv = new Patch();
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33 DiffHelper<LineSequence> pg = new DiffHelper<LineSequence>();
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34 pg.init(new LineSequence(prev).splitByNewlines(), new LineSequence(content).splitByNewlines());
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35 pg.findMatchingBlocks(new GeneratePatchInspector(rv));
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36 return rv;
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37 }
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38
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39 @Override
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40 protected void changed(int s1From, int s1To, int s2From, int s2To) {
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41 int from = seq1.chunk(s1From).getOffset();
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42 int to = seq1.chunk(s1To).getOffset();
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43 byte[] data = seq2.data(s2From, s2To);
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44 deltaCollector.add(from, to, data);
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45 }
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46
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47 @Override
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48 protected void deleted(int s2DeletionPoint, int s1From, int s1To) {
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49 int from = seq1.chunk(s1From).getOffset();
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50 int to = seq1.chunk(s1To).getOffset();
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51 deltaCollector.add(from, to, new byte[0]);
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52 }
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53
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54 @Override
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55 protected void added(int s1InsertPoint, int s2From, int s2To) {
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56 int insPoint = seq1.chunk(s1InsertPoint).getOffset();
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57 byte[] data = seq2.data(s2From, s2To);
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58 deltaCollector.add(insPoint, insPoint, data);
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59 }
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60 }