Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/ReverseAnnotateInspector.java @ 699:a483b2b68a2e
Provisional APIs and respective implementation for http, https and ssh remote repositories
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 08 Aug 2013 19:18:50 +0200 |
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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 |
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20 import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION; |
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21 |
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22 import java.util.Arrays; |
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23 |
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24 import org.tmatesoft.hg.core.HgAnnotateCommand; |
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25 import org.tmatesoft.hg.core.HgBlameInspector; |
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26 import org.tmatesoft.hg.core.HgIterateDirection; |
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27 import org.tmatesoft.hg.core.HgBlameInspector.RevisionDescriptor; |
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28 import org.tmatesoft.hg.core.HgCallbackTargetException; |
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29 import org.tmatesoft.hg.repo.HgInvalidStateException; |
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30 import org.tmatesoft.hg.util.CancelSupport; |
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31 import org.tmatesoft.hg.util.CancelledException; |
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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 * Produce output like 'hg annotate' does. |
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36 * Expects revisions to come in order from child to parent. |
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37 * Unlike {@link ForwardAnnotateInspector}, can be easily modified to report lines as soon as its origin is detected. |
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38 * |
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39 * (+) Handles annotate of partial history, at any moment lines with ({@link #knownLines} == <code>false</code> indicate lines |
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40 * that were added prior to any revision already visited. |
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41 * |
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42 * @author Artem Tikhomirov |
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43 * @author TMate Software Ltd. |
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44 */ |
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45 public class ReverseAnnotateInspector implements HgBlameInspector, RevisionDescriptor.Recipient { |
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46 |
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47 // keeps <startSeq1, startSeq2, len> of equal blocks, origin to target, from some previous step |
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48 private RangePairSeq activeEquals; |
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49 // equal blocks of the current iteration, to be recalculated before next step |
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50 // to track line number (current target to ultimate target) mapping |
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51 private RangePairSeq intermediateEquals = new RangePairSeq(); |
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52 |
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53 private boolean[] knownLines; |
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54 private RevisionDescriptor revisionDescriptor; |
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55 private BlockData lineContent; |
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56 |
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57 private IntMap<RangePairSeq> mergedRanges = new IntMap<RangePairSeq>(10); |
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58 private IntMap<RangePairSeq> equalRanges = new IntMap<RangePairSeq>(10); |
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59 private boolean activeEqualsComesFromMerge = false; |
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60 |
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61 private int[] lineRevisions; |
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62 private int[] lineNumbers; |
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63 |
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64 /** |
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65 * @return desired order of iteration for diff |
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66 */ |
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67 public HgIterateDirection iterateDirection() { |
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68 return HgIterateDirection.NewToOld; |
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69 } |
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70 |
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71 public void report(int annotateRevIndex, HgAnnotateCommand.Inspector insp, ProgressSupport progress, CancelSupport cancel) throws HgCallbackTargetException, CancelledException { |
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72 LineImpl li = new LineImpl(); |
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73 progress.start(lineRevisions.length); |
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74 for (int i = 0; i < lineRevisions.length; i++) { |
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75 byte[] c = lineContent.elementAt(i).asArray(); |
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76 li.init(i+1, lineNumbers[i] + 1, lineRevisions[i], c); |
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77 insp.next(li); |
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78 progress.worked(1); |
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79 cancel.checkCancelled(); |
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80 } |
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81 progress.done(); |
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82 } |
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83 |
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84 public void start(RevisionDescriptor rd) { |
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85 revisionDescriptor = rd; |
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86 if (knownLines == null) { |
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87 lineContent = rd.target(); |
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88 knownLines = new boolean[lineContent.elementCount()]; |
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89 lineRevisions = new int [knownLines.length]; |
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90 Arrays.fill(lineRevisions, NO_REVISION); |
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91 lineNumbers = new int[knownLines.length]; |
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92 activeEquals = new RangePairSeq(); |
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93 activeEquals.add(0, 0, knownLines.length); |
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94 equalRanges.put(rd.targetChangesetIndex(), activeEquals); |
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95 } else { |
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96 activeEquals = equalRanges.get(rd.targetChangesetIndex()); |
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97 if (activeEquals == null) { |
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98 // we didn't see this target revision as origin yet |
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99 // the only way this may happen is that this revision was a merge parent |
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100 activeEquals = mergedRanges.get(rd.targetChangesetIndex()); |
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101 activeEqualsComesFromMerge = true; |
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102 if (activeEquals == null) { |
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103 throw new HgInvalidStateException(String.format("Can't find previously visited revision %d (while in %d->%1$d diff)", rd.targetChangesetIndex(), rd.originChangesetIndex())); |
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104 } |
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105 } |
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106 } |
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107 } |
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108 |
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109 public void done(RevisionDescriptor rd) { |
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110 // update line numbers of the intermediate target to point to ultimate target's line numbers |
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111 RangePairSeq v = intermediateEquals.intersect(activeEquals); |
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112 if (activeEqualsComesFromMerge) { |
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113 mergedRanges.put(rd.originChangesetIndex(), v); |
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114 } else { |
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115 equalRanges.put(rd.originChangesetIndex(), v); |
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116 } |
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117 if (rd.isMerge() && !mergedRanges.containsKey(rd.mergeChangesetIndex())) { |
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118 // seen merge, but no lines were merged from p2. |
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119 // Add empty range to avoid uncertainty when a parent of p2 pops in |
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120 mergedRanges.put(rd.mergeChangesetIndex(), new RangePairSeq()); |
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121 } |
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122 intermediateEquals.clear(); |
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123 activeEquals = null; |
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124 activeEqualsComesFromMerge = false; |
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125 revisionDescriptor = null; |
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126 } |
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127 |
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128 public void same(EqualBlock block) { |
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129 intermediateEquals.add(block.originStart(), block.targetStart(), block.length()); |
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130 } |
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131 |
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132 public void added(AddBlock block) { |
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133 RangePairSeq rs = null; |
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134 if (revisionDescriptor.isMerge() && block.originChangesetIndex() == revisionDescriptor.mergeChangesetIndex()) { |
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135 rs = mergedRanges.get(revisionDescriptor.mergeChangesetIndex()); |
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136 if (rs == null) { |
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137 mergedRanges.put(revisionDescriptor.mergeChangesetIndex(), rs = new RangePairSeq()); |
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138 } |
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139 } |
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140 if (activeEquals.size() == 0) { |
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141 return; |
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142 } |
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143 for (int i = 0, ln = block.firstAddedLine(), x = block.totalAddedLines(); i < x; i++, ln++) { |
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144 int lnInFinal = activeEquals.mapLineIndex(ln); |
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145 if (lnInFinal != -1/* && !knownLines[lnInFinal]*/) { |
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146 if (rs != null) { |
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147 rs.add(block.insertedAt() + i, lnInFinal, 1); |
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148 } else { |
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149 line(lnInFinal, ln, block.targetChangesetIndex()); |
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150 } |
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151 knownLines[lnInFinal] = true; |
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152 } |
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153 } |
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154 } |
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155 |
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156 public void changed(ChangeBlock block) { |
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157 added(block); |
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158 } |
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159 |
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160 public void deleted(DeleteBlock block) { |
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161 } |
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162 |
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163 private void line(int lineNumber, int firstAppearance, int changesetRevIndex) { |
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164 lineRevisions[lineNumber] = changesetRevIndex; |
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165 lineNumbers[lineNumber] = firstAppearance; |
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166 } |
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167 } |