Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgDiffCommand.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 7839ff0bfd78
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.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(TIP);
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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 }