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annotate src/org/tmatesoft/hg/internal/AnnotateFacility.java @ 546:cd78e8b9d7bc

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File annotate test. Refactored FileAnnotation as standalone class, introduced LineInspector to make line offset calc code shared
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 18 Feb 2013 19:19:48 +0100
parents 15b406c7cd9d
children ab21ac7dd833
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
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21 import org.tmatesoft.hg.core.Nodeid;
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22 import org.tmatesoft.hg.internal.PatchGenerator.LineSequence;
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23 import org.tmatesoft.hg.repo.HgDataFile;
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24 import org.tmatesoft.hg.repo.HgInvalidStateException;
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25 import org.tmatesoft.hg.util.CancelledException;
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26
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27 /**
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28 *
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29 * @author Artem Tikhomirov
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30 * @author TMate Software Ltd.
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31 */
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32 @Experimental(reason="work in progress")
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33 public class AnnotateFacility {
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34
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35 /**
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36 * Annotates changes of the file against its parent(s)
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37 */
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38 public void annotateChange(HgDataFile df, int changesetRevisionIndex, BlockInspector insp) {
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39 // TODO detect if file is text/binary (e.g. looking for chars < ' ' and not \t\r\n\f
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40 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(changesetRevisionIndex, df.getPath());
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41 int fileRevIndex = df.getRevisionIndex(fileRev);
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42 int[] fileRevParents = new int[2];
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43 df.parents(fileRevIndex, fileRevParents, null, null);
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44 try {
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45 if (fileRevParents[0] != NO_REVISION && fileRevParents[1] != NO_REVISION) {
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46 // merge
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47 } else if (fileRevParents[0] == fileRevParents[1]) {
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48 // may be equal iff both are unset
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49 assert fileRevParents[0] == NO_REVISION;
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50 // everything added
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51 ByteArrayChannel c;
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52 df.content(fileRevIndex, c = new ByteArrayChannel());
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53 BlameBlockInspector bbi = new BlameBlockInspector(insp, NO_REVISION, changesetRevisionIndex);
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54 LineSequence cls = LineSequence.newlines(c.toArray());
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55 bbi.begin(LineSequence.newlines(new byte[0]), cls);
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56 bbi.match(0, cls.chunkCount()-1, 0);
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57 bbi.end();
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58 } else {
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59 int soleParent = fileRevParents[0] == NO_REVISION ? fileRevParents[1] : fileRevParents[0];
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60 assert soleParent != NO_REVISION;
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61 ByteArrayChannel c1, c2;
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62 df.content(soleParent, c1 = new ByteArrayChannel());
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63 df.content(fileRevIndex, c2 = new ByteArrayChannel());
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64 int parentChangesetRevIndex = df.getChangesetRevisionIndex(soleParent);
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65 PatchGenerator<LineSequence> pg = new PatchGenerator<LineSequence>();
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66 pg.init(LineSequence.newlines(c1.toArray()), LineSequence.newlines(c2.toArray()));
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67 pg.findMatchingBlocks(new BlameBlockInspector(insp, parentChangesetRevIndex, changesetRevisionIndex));
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68 }
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69 } catch (CancelledException ex) {
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70 // TODO likely it was bad idea to throw cancelled exception from content()
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71 // deprecate and provide alternative?
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72 HgInvalidStateException ise = new HgInvalidStateException("ByteArrayChannel never throws CancelledException");
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73 ise.initCause(ex);
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74 throw ise;
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75 }
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76 }
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77
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78 @Callback
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79 public interface BlockInspector {
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80 void same(EqualBlock block);
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81 void added(AddBlock block);
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82 void changed(ChangeBlock block);
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83 void deleted(DeleteBlock block);
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84 }
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85
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86 @Callback
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87 public interface BlockInspectorEx extends BlockInspector { // XXX better name
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88 // XXX perhaps, shall pass object instead of separate values for future extension?
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89 void start(int originLineCount, int targetLineCount);
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90 void done();
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91 }
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92
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93 public interface Block {
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94 int originChangesetIndex();
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95 int targetChangesetIndex();
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96 // boolean isMergeRevision();
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97 // int fileRevisionIndex();
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98 // int originFileRevisionIndex();
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99 // String[] lines();
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100 // byte[] data();
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101 }
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102
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103 public interface EqualBlock extends Block {
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104 int originStart();
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105 int targetStart();
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106 int length();
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107 }
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108
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109 public interface AddBlock extends Block {
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110 int insertedAt(); // line index in the old file
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111 int firstAddedLine();
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112 int totalAddedLines();
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113 String[] addedLines();
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114 }
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115 public interface DeleteBlock extends Block {
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116 int removedAt(); // line index in the new file
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117 int firstRemovedLine();
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118 int totalRemovedLines();
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119 String[] removedLines();
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120 }
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121 public interface ChangeBlock extends AddBlock, DeleteBlock {
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122 }
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123
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124 @Callback
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125 public interface LineInspector {
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126 void line(int lineNumber, int changesetRevIndex, LineDescriptor ld);
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127 }
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128
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129 public interface LineDescriptor {
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130 int totalLines();
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131 }
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132
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133
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134
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135 static class BlameBlockInspector extends PatchGenerator.DeltaInspector<LineSequence> {
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136 private final BlockInspector insp;
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137 private final int csetP1;
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138 private final int csetTarget;
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139
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140 public BlameBlockInspector(BlockInspector inspector, int parentCset1, int targetCset) {
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141 assert inspector != null;
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142 insp = inspector;
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143 csetP1 = parentCset1;
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144 csetTarget = targetCset;
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145 }
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146
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147 @Override
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148 public void begin(LineSequence s1, LineSequence s2) {
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149 super.begin(s1, s2);
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150 if (insp instanceof BlockInspectorEx) {
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151 ((BlockInspectorEx) insp).start(s1.chunkCount() - 1, s2.chunkCount() - 1);
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152 }
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153 }
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154
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155 @Override
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156 public void end() {
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157 super.end();
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158 if(insp instanceof BlockInspectorEx) {
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159 ((BlockInspectorEx) insp).done();
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160 }
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161 }
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162
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163 @Override
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164 protected void changed(int s1From, int s1To, int s2From, int s2To) {
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165 BlockImpl2 block = new BlockImpl2(seq1, seq2, s1From, s1To-s1From, s2From, s2To - s2From, s1From, s2From);
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166 block.setOriginAndTarget(csetP1, csetTarget);
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167 insp.changed(block);
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168 }
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169
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170 @Override
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171 protected void added(int s1InsertPoint, int s2From, int s2To) {
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172 BlockImpl2 block = new BlockImpl2(null, seq2, -1, -1, s2From, s2To - s2From, s1InsertPoint, -1);
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173 block.setOriginAndTarget(csetP1, csetTarget);
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174 insp.added(block);
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175 }
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176
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177 @Override
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178 protected void deleted(int s2DeletePoint, int s1From, int s1To) {
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179 BlockImpl2 block = new BlockImpl2(seq1, null, s1From, s1To - s1From, -1, -1, -1, s2DeletePoint);
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180 block.setOriginAndTarget(csetP1, csetTarget);
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181 insp.deleted(block);
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182 }
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183
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184 @Override
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185 protected void unchanged(int s1From, int s2From, int length) {
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186 BlockImpl1 block = new BlockImpl1(s1From, s2From, length);
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187 block.setOriginAndTarget(csetP1, csetTarget);
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188 insp.same(block);
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189 }
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190 }
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191
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192 static class BlockImpl implements Block {
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193
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194 private int originCset;
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195 private int targetCset;
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196
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197 void setOriginAndTarget(int originChangesetIndex, int targetChangesetIndex) {
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198 // XXX perhaps, shall be part of Inspector API, rather than Block's
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199 // as they don't change between blocks (although the moment about merged revisions)
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200 // is not yet clear to me
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201 originCset = originChangesetIndex;
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202 targetCset = targetChangesetIndex;
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203 }
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204
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205 public int originChangesetIndex() {
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206 return originCset;
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207 }
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208
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209 public int targetChangesetIndex() {
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210 return targetCset;
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211 }
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212 }
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213
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214 static class BlockImpl1 extends BlockImpl implements EqualBlock {
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215 private final int start1, start2;
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216 private final int length;
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217
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218 BlockImpl1(int blockStartSeq1, int blockStartSeq2, int blockLength) {
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219 start1 = blockStartSeq1;
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220 start2 = blockStartSeq2;
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221 length = blockLength;
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222 }
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223
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224 public int originStart() {
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225 return start1;
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226 }
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227
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228 public int targetStart() {
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229 return start2;
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230 }
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231
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232 public int length() {
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233 return length;
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234 }
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235
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236 @Override
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237 public String toString() {
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238 return String.format("@@ [%d..%d) == [%d..%d) @@", start1, start1+length, start2, start2+length);
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239 }
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240 }
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241
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242 static class BlockImpl2 extends BlockImpl implements ChangeBlock {
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243
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244 private final LineSequence oldSeq;
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245 private final LineSequence newSeq;
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246 private final int s1Start;
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247 private final int s1Len;
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248 private final int s2Start;
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249 private final int s2Len;
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250 private final int s1InsertPoint;
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251 private final int s2DeletePoint;
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252
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253 public BlockImpl2(LineSequence s1, LineSequence s2, int s1Start, int s1Len, int s2Start, int s2Len, int s1InsertPoint, int s2DeletePoint) {
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254 oldSeq = s1;
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255 newSeq = s2;
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256 this.s1Start = s1Start;
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257 this.s1Len = s1Len;
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258 this.s2Start = s2Start;
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259 this.s2Len = s2Len;
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260 this.s1InsertPoint = s1InsertPoint;
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261 this.s2DeletePoint = s2DeletePoint;
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262 }
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263
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264 public int insertedAt() {
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265 return s1InsertPoint;
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266 }
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267
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268 public int firstAddedLine() {
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269 return s2Start;
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270 }
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271
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272 public int totalAddedLines() {
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273 return s2Len;
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274 }
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275
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276 public String[] addedLines() {
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277 return generateLines(totalAddedLines(), firstAddedLine());
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278 }
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279
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280 public int removedAt() {
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281 return s2DeletePoint;
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282 }
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283
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284 public int firstRemovedLine() {
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285 return s1Start;
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286 }
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287
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288 public int totalRemovedLines() {
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289 return s1Len;
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290 }
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291
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292 public String[] removedLines() {
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293 return generateLines(totalRemovedLines(), firstRemovedLine());
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294 }
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295
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296 private String[] generateLines(int count, int startFrom) {
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297 String[] rv = new String[count];
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298 for (int i = 0; i < count; i++) {
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299 rv[i] = String.format("LINE %d", startFrom + i+1);
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300 }
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301 return rv;
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302 }
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303
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304 @Override
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305 public String toString() {
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306 if (s2DeletePoint == -1) {
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307 return String.format("@@ -%d,0 +%d,%d @@", insertedAt(), firstAddedLine(), totalAddedLines());
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308 } else if (s1InsertPoint == -1) {
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309 // delete only
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310 return String.format("@@ -%d,%d +%d,0 @@", firstRemovedLine(), totalRemovedLines(), removedAt());
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311 }
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312 return String.format("@@ -%d,%d +%d,%d @@", firstRemovedLine(), totalRemovedLines(), firstAddedLine(), totalAddedLines());
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313 }
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314 }
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315 }