Mercurial > jhg

comparison src/org/tmatesoft/hg/internal/GeneratePatchInspector.java @ 544:7f5998a9619d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Refactor PatchGenerator to be generic and welcome sequence of any nature
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 15 Feb 2013 16:48:54 +0100
parents
children 4ea0351ca878
comparison
equal deleted inserted replaced
543:1e95f48d9886 544:7f5998a9619d
1 /*
2 * Copyright (c) 2013 TMate Software Ltd
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * For information on how to redistribute this software under
14 * the terms of a license other than GNU General Public License
15 * contact TMate Software at support@hg4j.com
16 */
17 package org.tmatesoft.hg.internal;
18
19 import org.tmatesoft.hg.internal.PatchGenerator.DeltaInspector;
20 import org.tmatesoft.hg.internal.PatchGenerator.LineSequence;
21
22 class GeneratePatchInspector extends DeltaInspector<LineSequence> {
23 private final Patch deltaCollector;
24
25 GeneratePatchInspector(Patch p) {
26 assert p != null;
27 deltaCollector = p;
28 }
29
30 public static Patch delta(byte[] prev, byte[] content) {
31 Patch rv = new Patch();
32 PatchGenerator<LineSequence> pg = new PatchGenerator<LineSequence>();
33 pg.init(new LineSequence(prev).splitByNewlines(), new LineSequence(content).splitByNewlines());
34 pg.findMatchingBlocks(new GeneratePatchInspector(rv));
35 return rv;
36 }
37
38 @Override
39 protected void changed(int s1From, int s1To, int s2From, int s2To) {
40 int from = seq1.chunk(s1From).getOffset();
41 int to = seq1.chunk(s1To).getOffset();
42 byte[] data = seq2.data(s2From, s2To);
43 deltaCollector.add(from, to, data);
44 }
45
46 @Override
47 protected void deleted(int s2DeletionPoint, int s1From, int s1To) {
48 int from = seq1.chunk(s1From).getOffset();
49 int to = seq1.chunk(s1To).getOffset();
50 deltaCollector.add(from, to, new byte[0]);
51 }
52
53 @Override
54 protected void added(int s1InsertPoint, int s2From, int s2To) {
55 int insPoint = seq1.chunk(s1InsertPoint).getOffset();
56 byte[] data = seq2.data(s2From, s2To);
57 deltaCollector.add(insPoint, insPoint, data);
58 }
59 }