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annotate src/org/tmatesoft/hg/internal/AnnotateFacility.java @ 548:ab21ac7dd833

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Line-by-line annotation API and support code in place
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 18 Feb 2013 19:58:51 +0100
parents cd78e8b9d7bc
children 83afa680555d
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 static org.tmatesoft.hg.repo.HgRepository.NO_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21
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22 import org.tmatesoft.hg.core.Nodeid;
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23 import org.tmatesoft.hg.internal.PatchGenerator.LineSequence;
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24 import org.tmatesoft.hg.repo.HgDataFile;
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25 import org.tmatesoft.hg.repo.HgInvalidStateException;
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26 import org.tmatesoft.hg.repo.HgRepository;
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27 import org.tmatesoft.hg.util.CancelledException;
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28
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29 /**
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30 *
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31 * @author Artem Tikhomirov
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32 * @author TMate Software Ltd.
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33 */
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34 @Experimental(reason="work in progress")
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35 public class AnnotateFacility {
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36
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37 /**
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38 * Annotate file revision, line by line.
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39 */
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40 public void annotate(HgDataFile df, int changesetRevisionIndex, LineInspector insp) {
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41 if (!df.exists()) {
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42 return;
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43 }
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44 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(changesetRevisionIndex, df.getPath());
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45 int fileRevIndex = df.getRevisionIndex(fileRev);
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46 int[] fileRevParents = new int[2];
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47 FileAnnotation fa = new FileAnnotation(insp);
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48 do {
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49 // also covers changesetRevisionIndex == TIP, #implAnnotateChange doesn't tolerate constants
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50 changesetRevisionIndex = df.getChangesetRevisionIndex(fileRevIndex);
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51 df.parents(fileRevIndex, fileRevParents, null, null);
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52 implAnnotateChange(df, changesetRevisionIndex, fileRevIndex, fileRevParents, fa);
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53 fileRevIndex = fileRevParents[0];
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54 } while (fileRevIndex != NO_REVISION);
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55 }
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56
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57 /**
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58 * Annotates changes of the file against its parent(s)
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59 */
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60 public void annotateChange(HgDataFile df, int changesetRevisionIndex, BlockInspector insp) {
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61 // TODO detect if file is text/binary (e.g. looking for chars < ' ' and not \t\r\n\f
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62 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(changesetRevisionIndex, df.getPath());
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63 int fileRevIndex = df.getRevisionIndex(fileRev);
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64 int[] fileRevParents = new int[2];
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65 df.parents(fileRevIndex, fileRevParents, null, null);
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66 if (changesetRevisionIndex == TIP) {
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67 changesetRevisionIndex = df.getChangesetRevisionIndex(fileRevIndex);
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68 }
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69 implAnnotateChange(df, changesetRevisionIndex, fileRevIndex, fileRevParents, insp);
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70 }
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71
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72 private void implAnnotateChange(HgDataFile df, int csetRevIndex, int fileRevIndex, int[] fileParentRevs, BlockInspector insp) {
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73 try {
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74 if (fileParentRevs[0] != NO_REVISION && fileParentRevs[1] != NO_REVISION) {
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75 // merge
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76 } else if (fileParentRevs[0] == fileParentRevs[1]) {
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77 // may be equal iff both are unset
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78 assert fileParentRevs[0] == NO_REVISION;
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79 // everything added
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80 ByteArrayChannel c;
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81 df.content(fileRevIndex, c = new ByteArrayChannel());
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82 BlameBlockInspector bbi = new BlameBlockInspector(insp, NO_REVISION, csetRevIndex);
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83 LineSequence cls = LineSequence.newlines(c.toArray());
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84 bbi.begin(LineSequence.newlines(new byte[0]), cls);
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85 bbi.match(0, cls.chunkCount()-1, 0);
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86 bbi.end();
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87 } else {
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88 int soleParent = fileParentRevs[0] == NO_REVISION ? fileParentRevs[1] : fileParentRevs[0];
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89 assert soleParent != NO_REVISION;
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90 ByteArrayChannel c1, c2;
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91 df.content(soleParent, c1 = new ByteArrayChannel());
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92 df.content(fileRevIndex, c2 = new ByteArrayChannel());
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93 int parentChangesetRevIndex = df.getChangesetRevisionIndex(soleParent);
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94 PatchGenerator<LineSequence> pg = new PatchGenerator<LineSequence>();
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95 pg.init(LineSequence.newlines(c1.toArray()), LineSequence.newlines(c2.toArray()));
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96 pg.findMatchingBlocks(new BlameBlockInspector(insp, parentChangesetRevIndex, csetRevIndex));
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97 }
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98 } catch (CancelledException ex) {
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99 // TODO likely it was bad idea to throw cancelled exception from content()
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100 // deprecate and provide alternative?
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101 HgInvalidStateException ise = new HgInvalidStateException("ByteArrayChannel never throws CancelledException");
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102 ise.initCause(ex);
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103 throw ise;
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104 }
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105 }
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106
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107 @Callback
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108 public interface BlockInspector {
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109 void same(EqualBlock block);
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110 void added(AddBlock block);
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111 void changed(ChangeBlock block);
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112 void deleted(DeleteBlock block);
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113 }
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114
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115 @Callback
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116 public interface BlockInspectorEx extends BlockInspector { // XXX better name
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117 // XXX perhaps, shall pass object instead of separate values for future extension?
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118 void start(int originLineCount, int targetLineCount);
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119 void done();
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120 }
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121
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122 public interface Block {
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123 int originChangesetIndex();
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124 int targetChangesetIndex();
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125 // boolean isMergeRevision();
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126 // int fileRevisionIndex();
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127 // int originFileRevisionIndex();
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128 // String[] lines();
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129 // byte[] data();
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130 }
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131
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132 public interface EqualBlock extends Block {
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133 int originStart();
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134 int targetStart();
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135 int length();
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136 }
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137
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138 public interface AddBlock extends Block {
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139 int insertedAt(); // line index in the old file
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140 int firstAddedLine();
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141 int totalAddedLines();
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142 String[] addedLines();
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143 }
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144 public interface DeleteBlock extends Block {
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145 int removedAt(); // line index in the new file
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146 int firstRemovedLine();
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147 int totalRemovedLines();
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148 String[] removedLines();
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149 }
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150 public interface ChangeBlock extends AddBlock, DeleteBlock {
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151 }
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152
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153 @Callback
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154 public interface LineInspector {
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155 /**
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156 * Not necessarily invoked sequentially by line numbers
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157 */
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158 void line(int lineNumber, int changesetRevIndex, LineDescriptor ld);
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159 }
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160
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161 public interface LineDescriptor {
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162 int totalLines();
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163 }
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165
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166
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167 static class BlameBlockInspector extends PatchGenerator.DeltaInspector<LineSequence> {
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168 private final BlockInspector insp;
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169 private final int csetP1;
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170 private final int csetTarget;
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171
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172 public BlameBlockInspector(BlockInspector inspector, int parentCset1, int targetCset) {
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173 assert inspector != null;
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174 insp = inspector;
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175 csetP1 = parentCset1;
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176 csetTarget = targetCset;
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177 }
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178
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179 @Override
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180 public void begin(LineSequence s1, LineSequence s2) {
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181 super.begin(s1, s2);
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182 if (insp instanceof BlockInspectorEx) {
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183 ((BlockInspectorEx) insp).start(s1.chunkCount() - 1, s2.chunkCount() - 1);
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184 }
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185 }
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186
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187 @Override
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188 public void end() {
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189 super.end();
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190 if(insp instanceof BlockInspectorEx) {
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191 ((BlockInspectorEx) insp).done();
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192 }
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193 }
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194
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195 @Override
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196 protected void changed(int s1From, int s1To, int s2From, int s2To) {
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197 BlockImpl2 block = new BlockImpl2(seq1, seq2, s1From, s1To-s1From, s2From, s2To - s2From, s1From, s2From);
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198 block.setOriginAndTarget(csetP1, csetTarget);
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199 insp.changed(block);
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200 }
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201
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202 @Override
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203 protected void added(int s1InsertPoint, int s2From, int s2To) {
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204 BlockImpl2 block = new BlockImpl2(null, seq2, -1, -1, s2From, s2To - s2From, s1InsertPoint, -1);
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205 block.setOriginAndTarget(csetP1, csetTarget);
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206 insp.added(block);
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207 }
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208
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209 @Override
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210 protected void deleted(int s2DeletePoint, int s1From, int s1To) {
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211 BlockImpl2 block = new BlockImpl2(seq1, null, s1From, s1To - s1From, -1, -1, -1, s2DeletePoint);
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212 block.setOriginAndTarget(csetP1, csetTarget);
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213 insp.deleted(block);
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214 }
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215
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216 @Override
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217 protected void unchanged(int s1From, int s2From, int length) {
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218 BlockImpl1 block = new BlockImpl1(s1From, s2From, length);
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219 block.setOriginAndTarget(csetP1, csetTarget);
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220 insp.same(block);
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221 }
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222 }
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223
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224 static class BlockImpl implements Block {
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225
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226 private int originCset;
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227 private int targetCset;
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228
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229 void setOriginAndTarget(int originChangesetIndex, int targetChangesetIndex) {
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230 // XXX perhaps, shall be part of Inspector API, rather than Block's
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231 // as they don't change between blocks (although the moment about merged revisions)
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232 // is not yet clear to me
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233 originCset = originChangesetIndex;
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234 targetCset = targetChangesetIndex;
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235 }
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236
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237 public int originChangesetIndex() {
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238 return originCset;
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239 }
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240
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241 public int targetChangesetIndex() {
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242 return targetCset;
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243 }
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244 }
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245
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246 static class BlockImpl1 extends BlockImpl implements EqualBlock {
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247 private final int start1, start2;
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248 private final int length;
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249
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250 BlockImpl1(int blockStartSeq1, int blockStartSeq2, int blockLength) {
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251 start1 = blockStartSeq1;
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252 start2 = blockStartSeq2;
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253 length = blockLength;
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254 }
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255
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256 public int originStart() {
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257 return start1;
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258 }
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259
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260 public int targetStart() {
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261 return start2;
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262 }
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263
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264 public int length() {
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265 return length;
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266 }
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267
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268 @Override
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269 public String toString() {
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270 return String.format("@@ [%d..%d) == [%d..%d) @@", start1, start1+length, start2, start2+length);
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271 }
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272 }
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273
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274 static class BlockImpl2 extends BlockImpl implements ChangeBlock {
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275
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276 private final LineSequence oldSeq;
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277 private final LineSequence newSeq;
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278 private final int s1Start;
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279 private final int s1Len;
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280 private final int s2Start;
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281 private final int s2Len;
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282 private final int s1InsertPoint;
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283 private final int s2DeletePoint;
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284
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285 public BlockImpl2(LineSequence s1, LineSequence s2, int s1Start, int s1Len, int s2Start, int s2Len, int s1InsertPoint, int s2DeletePoint) {
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286 oldSeq = s1;
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287 newSeq = s2;
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288 this.s1Start = s1Start;
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289 this.s1Len = s1Len;
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290 this.s2Start = s2Start;
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291 this.s2Len = s2Len;
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292 this.s1InsertPoint = s1InsertPoint;
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293 this.s2DeletePoint = s2DeletePoint;
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294 }
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295
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296 public int insertedAt() {
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297 return s1InsertPoint;
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298 }
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299
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300 public int firstAddedLine() {
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301 return s2Start;
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302 }
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303
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304 public int totalAddedLines() {
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305 return s2Len;
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306 }
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307
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308 public String[] addedLines() {
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309 return generateLines(totalAddedLines(), firstAddedLine());
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310 }
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311
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312 public int removedAt() {
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313 return s2DeletePoint;
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314 }
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315
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316 public int firstRemovedLine() {
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317 return s1Start;
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318 }
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319
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320 public int totalRemovedLines() {
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321 return s1Len;
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322 }
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323
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324 public String[] removedLines() {
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325 return generateLines(totalRemovedLines(), firstRemovedLine());
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326 }
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327
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328 private String[] generateLines(int count, int startFrom) {
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329 String[] rv = new String[count];
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330 for (int i = 0; i < count; i++) {
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331 rv[i] = String.format("LINE %d", startFrom + i+1);
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332 }
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333 return rv;
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334 }
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335
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336 @Override
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337 public String toString() {
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338 if (s2DeletePoint == -1) {
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339 return String.format("@@ -%d,0 +%d,%d @@", insertedAt(), firstAddedLine(), totalAddedLines());
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340 } else if (s1InsertPoint == -1) {
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341 // delete only
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342 return String.format("@@ -%d,%d +%d,0 @@", firstRemovedLine(), totalRemovedLines(), removedAt());
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343 }
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344 return String.format("@@ -%d,%d +%d,%d @@", firstRemovedLine(), totalRemovedLines(), firstAddedLine(), totalAddedLines());
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345 }
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346 }
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347 }