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annotate src/org/tmatesoft/hg/core/HgDiffCommand.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 98ff1fb49abe
children 497e697636fc
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.core;
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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.internal.CsetParamKeeper;
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23 import org.tmatesoft.hg.internal.FileHistory;
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24 import org.tmatesoft.hg.internal.FileRevisionHistoryChunk;
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25 import org.tmatesoft.hg.internal.diff.BlameHelper;
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26 import org.tmatesoft.hg.repo.HgDataFile;
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27 import org.tmatesoft.hg.repo.HgRepository;
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28 import org.tmatesoft.hg.repo.HgRuntimeException;
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29 import org.tmatesoft.hg.util.CancelSupport;
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30 import org.tmatesoft.hg.util.CancelledException;
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31 import org.tmatesoft.hg.util.Path;
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32 import org.tmatesoft.hg.util.ProgressSupport;
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33
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34 /**
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35 * 'hg diff' counterpart, with similar, although not identical, functionality.
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36 * Despite both 'hg diff' and this command are diff-based, implementation
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37 * peculiarities may lead to slightly different diff results. Either is valid
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38 * as there's no strict diff specification.
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39 *
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40 * <p>
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41 * <strong>Note</strong>, at the moment this command annotates single file only. Diff over
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42 * complete repository (all the file changed in a given changeset) might
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43 * be added later.
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44 *
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45 * @since 1.1
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46 * @author Artem Tikhomirov
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47 * @author TMate Software Ltd.
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48 */
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49 public class HgDiffCommand extends HgAbstractCommand<HgDiffCommand> {
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50
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51 private final HgRepository repo;
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52 private HgDataFile df;
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53 private final CsetParamKeeper clogRevIndexStart, clogRevIndexEnd;
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54 private HgIterateDirection iterateDirection = HgIterateDirection.NewToOld;
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55
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56 public HgDiffCommand(HgRepository hgRepo) {
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57 repo = hgRepo;
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58 clogRevIndexStart = new CsetParamKeeper(hgRepo);
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59 clogRevIndexEnd = new CsetParamKeeper(hgRepo);
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60 }
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61
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62 public HgDiffCommand file(Path file) {
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63 df = repo.getFileNode(file);
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64 return this;
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65 }
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66
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67 /**
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68 * Selects the file which history to blame, mandatory.
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69 *
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70 * @param file repository file
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71 * @return <code>this</code> for convenience
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72 */
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73 public HgDiffCommand file(HgDataFile file) {
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74 df = file;
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75 return this;
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76 }
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77
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78 /**
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79 * Select range of file's history for {@link #executeDiff(HgBlameInspector)}
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80 * and {@link #executeAnnotate(HgBlameInspector)}.
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81 * <p>
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82 * {@link #executeDiff(HgBlameInspector) diff} uses these as revisions to diff against each other, while
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83 * {@link #executeAnnotate(HgBlameInspector) annotate} walks the range.
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84 *
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85 * @param changelogRevIndexStart index of changelog revision, left range boundary
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86 * @param changelogRevIndexEnd index of changelog revision, right range boundary
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87 * @return <code>this</code> for convenience
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88 * @throws HgBadArgumentException if failed to find any of supplied changeset
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89 */
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90 public HgDiffCommand range(int changelogRevIndexStart, int changelogRevIndexEnd) throws HgBadArgumentException {
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91 clogRevIndexStart.set(changelogRevIndexStart);
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92 clogRevIndexEnd.set(changelogRevIndexEnd);
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93 return this;
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94 }
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96 /**
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97 * Select range of file history, limited by changesets.
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98 * @see #range(int, int)
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99 * @param cset1 changelog revision, left range boundary
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100 * @param cset2 changelog revision, right range boundary
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101 * @return <code>this</code> for convenience
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102 * @throws HgBadArgumentException if revisions are not valid changeset identifiers
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103 */
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104 public HgDiffCommand range(Nodeid cset1, Nodeid cset2) throws HgBadArgumentException {
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105 clogRevIndexStart.set(cset1);
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106 clogRevIndexEnd.set(cset2);
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107 return this;
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108 }
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109
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110 /**
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111 * Selects revision for {@link #executeParentsAnnotate(HgBlameInspector)}, the one
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112 * to diff against its parents.
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113 *
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114 * Besides, it is handy when range of interest spans up to the very beginning of the file history
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115 * (and thus is equivalent to <code>range(0, changelogRevIndex)</code>)
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116 *
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117 * @param changelogRevIndex index of changelog revision
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118 * @return <code>this</code> for convenience
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119 * @throws HgBadArgumentException if failed to find supplied changeset
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120 */
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121 public HgDiffCommand changeset(int changelogRevIndex) throws HgBadArgumentException {
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122 clogRevIndexStart.set(0);
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123 clogRevIndexEnd.set(changelogRevIndex);
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124 return this;
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125 }
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126
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127 /**
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128 * Select specific changeset or a range [0..changeset], like {@link #changeset(int)}
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129 *
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130 * @param nid changeset
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131 * @return <code>this</code> for convenience
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132 * @throws HgBadArgumentException if failed to find supplied changeset revision
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133 */
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134 public HgDiffCommand changeset(Nodeid nid) throws HgBadArgumentException {
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135 clogRevIndexStart.set(0);
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136 clogRevIndexEnd.set(nid);
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137 return this;
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138 }
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139
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140
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141 /**
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142 * Revision differences are reported in selected order when
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143 * annotating {@link #range(int, int) range} of changesets with
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144 * {@link #executeAnnotate(HgBlameInspector)}.
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145 * <p>
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146 * This method doesn't affect {@link #executeParentsAnnotate(HgBlameInspector)} and
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147 * {@link #executeDiff(HgBlameInspector)}
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148 *
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149 * @param order desired iteration order
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150 * @return <code>this</code> for convenience
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151 */
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152 public HgDiffCommand order(HgIterateDirection order) {
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153 iterateDirection = order;
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154 return this;
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155 }
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156
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157 /**
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158 * Diff two revisions selected with {@link #range(int, int)} against each other.
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159 * <p>mimics 'hg diff -r clogRevIndex1 -r clogRevIndex2'
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160 *
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161 * @throws HgCallbackTargetException propagated exception from the handler
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162 * @throws CancelledException if execution of the command was cancelled
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163 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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164 */
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165 public void executeDiff(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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166 checkFile();
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167 final ProgressSupport progress = getProgressSupport(insp);
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168 progress.start(2);
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169 try {
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170 final int startRevIndex = clogRevIndexStart.get(0);
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171 final int endRevIndex = clogRevIndexEnd.get(TIP);
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172 final CancelSupport cancel = getCancelSupport(insp, true);
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173 int fileRevIndex1 = fileRevIndex(df, startRevIndex);
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174 int fileRevIndex2 = fileRevIndex(df, endRevIndex);
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175 BlameHelper bh = new BlameHelper(insp);
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176 bh.prepare(df, startRevIndex, endRevIndex);
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177 progress.worked(1);
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178 cancel.checkCancelled();
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179 bh.diff(fileRevIndex1, startRevIndex, fileRevIndex2, endRevIndex);
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180 progress.worked(1);
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181 cancel.checkCancelled();
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182 } catch (HgRuntimeException ex) {
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183 throw new HgLibraryFailureException(ex);
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184 } finally {
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185 progress.done();
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186 }
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187 }
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188
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189 /**
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190 * Walk file history {@link #range(int, int) range} and report changes (diff) for each revision
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191 *
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192 * @throws HgCallbackTargetException propagated exception from the handler
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193 * @throws CancelledException if execution of the command was cancelled
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194 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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195 */
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196 public void executeAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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197 checkFile();
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198 ProgressSupport progress = null;
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199 try {
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200 if (!df.exists()) {
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201 return;
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202 }
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203 final CancelSupport cancel = getCancelSupport(insp, true);
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204 BlameHelper bh = new BlameHelper(insp);
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205 final int startRevIndex = clogRevIndexStart.get(0);
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206 final int endRevIndex = clogRevIndexEnd.get(TIP);
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207 FileHistory fileHistory = bh.prepare(df, startRevIndex, endRevIndex);
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208 //
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209 cancel.checkCancelled();
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210 int totalWork = 0;
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211 for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
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212 totalWork += fhc.revisionCount();
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213 }
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214 progress = getProgressSupport(insp);
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215 progress.start(totalWork + 1);
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216 progress.worked(1); // BlameHelper.prepare
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217 //
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218 int[] fileClogParentRevs = new int[2];
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219 int[] fileParentRevs = new int[2];
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220 for (FileRevisionHistoryChunk fhc : fileHistory.iterate(iterateDirection)) {
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221 for (int fri : fhc.fileRevisions(iterateDirection)) {
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222 int clogRevIndex = fhc.changeset(fri);
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223 // the way we built fileHistory ensures we won't walk past [changelogRevIndexStart..changelogRevIndexEnd]
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224 assert clogRevIndex >= startRevIndex;
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225 assert clogRevIndex <= endRevIndex;
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226 fhc.fillFileParents(fri, fileParentRevs);
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227 fhc.fillCsetParents(fri, fileClogParentRevs);
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228 bh.annotateChange(fri, clogRevIndex, fileParentRevs, fileClogParentRevs);
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229 progress.worked(1);
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230 cancel.checkCancelled();
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231 }
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232 }
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233 } catch (HgRuntimeException ex) {
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234 throw new HgLibraryFailureException(ex);
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235 } finally {
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236 if (progress != null) {
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237 progress.done();
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238 }
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239 }
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240 }
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241
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242 /**
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243 * Annotates changes of the file against its parent(s).
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244 * Unlike {@link #annotate(HgDataFile, int, Inspector, HgIterateDirection)}, doesn't
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245 * walk file history, looks at the specified revision only. Handles both parents (if merge revision).
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246 *
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247 * @throws HgCallbackTargetException propagated exception from the handler
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248 * @throws CancelledException if execution of the command was cancelled
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249 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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250 */
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251 public void executeParentsAnnotate(HgBlameInspector insp) throws HgCallbackTargetException, CancelledException, HgException {
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252 checkFile();
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253 final ProgressSupport progress = getProgressSupport(insp);
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254 progress.start(2);
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255 try {
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256 final CancelSupport cancel = getCancelSupport(insp, true);
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257 int changelogRevisionIndex = clogRevIndexEnd.get();
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258 // TODO detect if file is text/binary (e.g. looking for chars < ' ' and not \t\r\n\f
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259 int fileRevIndex = fileRevIndex(df, changelogRevisionIndex);
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260 int[] fileRevParents = new int[2];
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261 df.parents(fileRevIndex, fileRevParents, null, null);
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262 if (changelogRevisionIndex == TIP) {
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263 changelogRevisionIndex = df.getChangesetRevisionIndex(fileRevIndex);
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264 }
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265 int[] fileClogParentRevs = new int[2];
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266 fileClogParentRevs[0] = fileRevParents[0] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[0]);
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267 fileClogParentRevs[1] = fileRevParents[1] == NO_REVISION ? NO_REVISION : df.getChangesetRevisionIndex(fileRevParents[1]);
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268 BlameHelper bh = new BlameHelper(insp);
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269 int clogIndexStart = fileClogParentRevs[0] == NO_REVISION ? (fileClogParentRevs[1] == NO_REVISION ? 0 : fileClogParentRevs[1]) : fileClogParentRevs[0];
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270 bh.prepare(df, clogIndexStart, changelogRevisionIndex);
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271 progress.worked(1);
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272 cancel.checkCancelled();
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273 bh.annotateChange(fileRevIndex, changelogRevisionIndex, fileRevParents, fileClogParentRevs);
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274 progress.worked(1);
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275 cancel.checkCancelled();
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276 } catch (HgRuntimeException ex) {
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277 throw new HgLibraryFailureException(ex);
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278 } finally {
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279 progress.done();
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280 }
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281 }
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282
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283 private void checkFile() {
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284 if (df == null) {
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285 throw new IllegalArgumentException("File is not set");
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286 }
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287 }
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288
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289 private static int fileRevIndex(HgDataFile df, int csetRevIndex) throws HgRuntimeException {
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290 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetRevIndex, df.getPath());
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291 return df.getRevisionIndex(fileRev);
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292 }
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293 }