Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/diff/ForwardAnnotateInspector.java @ 709:497e697636fc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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.internal.diff;
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18
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19 import org.tmatesoft.hg.core.HgAnnotateCommand.Inspector;
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20 import org.tmatesoft.hg.core.HgBlameInspector;
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21 import org.tmatesoft.hg.core.HgCallbackTargetException;
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22 import org.tmatesoft.hg.core.HgIterateDirection;
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23 import org.tmatesoft.hg.internal.IntMap;
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24 import org.tmatesoft.hg.internal.IntSliceSeq;
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25 import org.tmatesoft.hg.internal.IntTuple;
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26 import org.tmatesoft.hg.util.CancelSupport;
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27 import org.tmatesoft.hg.util.CancelledException;
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28 import org.tmatesoft.hg.util.ProgressSupport;
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29
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30 /**
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31 * Annotate file history iterating from parents to children
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32 *
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33 * At the moment, doesn't handle start from any revision but 0
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34 *
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35 * (+) May report annotate for any revision (with actual file change) in the visited range.
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36 *
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37 * @see ReverseAnnotateInspector
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public class ForwardAnnotateInspector implements HgBlameInspector, HgBlameInspector.RevisionDescriptor.Recipient {
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42 final IntMap<IntSliceSeq> all = new IntMap<IntSliceSeq>(100);
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43 // revision->map(lineNumber->lineContent)
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44 private final IntMap<IntMap<byte[]>> lineContent = new IntMap<IntMap<byte[]>>(100);
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45 private IntSliceSeq current;
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46 private RevisionDescriptor revDescriptor;
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47
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48 /**
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49 * @return desired order of iteration for diff
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50 */
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51 public HgIterateDirection iterateDirection() {
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52 return HgIterateDirection.OldToNew;
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53 }
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54
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55 public void report(int revision, Inspector insp, ProgressSupport progress, CancelSupport cancel) throws HgCallbackTargetException, CancelledException {
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56 int totalLines = 0;
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57 if (!all.containsKey(revision)) {
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58 throw new IllegalArgumentException(String.format("Revision %d has not been visited", revision));
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59 }
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60 for (IntTuple t : all.get(revision)) {
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61 totalLines += t.at(0);
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62 }
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63 progress.start(totalLines);
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64 LineImpl li = new LineImpl();
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65 int line = 1;
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66 for (IntTuple t : all.get(revision)) {
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67 IntMap<byte[]> revLines = lineContent.get(t.at(1));
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68 for (int i = 0, x = t.at(0); i < x; i++) {
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69 final int lineInRev = t.at(2) + i;
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70 final byte[] lc = revLines.get(lineInRev);
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71 li.init(line++, lineInRev+1, t.at(1), lc);
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72 insp.next(li);
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73 progress.worked(1);
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74 cancel.checkCancelled();
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75 }
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76 }
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77 progress.done();
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78 }
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79
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80 public void start(RevisionDescriptor rd) throws HgCallbackTargetException {
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81 all.put(rd.targetChangesetIndex(), current = new IntSliceSeq(3));
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82 revDescriptor = rd;
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83 }
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85 public void done(RevisionDescriptor rd) throws HgCallbackTargetException {
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86 revDescriptor = null;
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87 }
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89 public void same(EqualBlock block) throws HgCallbackTargetException {
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90 copyBlock(block.originChangesetIndex(), block.originStart(), block.length());
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91 }
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93 public void added(AddBlock block) throws HgCallbackTargetException {
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94 if (revDescriptor.isMerge() && block.originChangesetIndex() == revDescriptor.mergeChangesetIndex()) {
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95 assert block.mergeLineAt() != -1;
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96 copyBlock(block.originChangesetIndex(), block.mergeLineAt(), block.totalAddedLines());
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97 return;
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98 }
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99 BlockData addedLines = block.addedLines();
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100 IntMap<byte[]> revLines = lineContent.get(block.targetChangesetIndex());
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101 if (revLines == null) {
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102 lineContent.put(block.targetChangesetIndex(), revLines = new IntMap<byte[]>(block.totalAddedLines()));
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103 }
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104 for (int i = 0; i < block.totalAddedLines(); i++) {
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105 revLines.put(block.firstAddedLine() + i, addedLines.elementAt(i).asArray());
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106 }
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107 current.add(block.totalAddedLines(), block.targetChangesetIndex(), block.firstAddedLine());
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108 }
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109
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110 public void changed(ChangeBlock block) throws HgCallbackTargetException {
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111 added(block);
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112 }
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113
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114 public void deleted(DeleteBlock block) throws HgCallbackTargetException {
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115 }
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116
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117 private void copyBlock(int originChangesetIndex, int blockStart, int length) {
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118 IntSliceSeq origin = all.get(originChangesetIndex);
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119 assert origin != null; // shall visit parents before came to this child
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120 int originPos = 0;
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121 int targetBlockLen = length;
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122 for (IntTuple t : origin) {
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123 int originBlockLen = t.at(0);
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124 int originBlockEnd = originPos + originBlockLen;
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125 if (originBlockEnd > blockStart) {
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126 // part of origin block from blockStart up to originBlockEnd, but not more
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127 // than size of the block (when blockStart is out of block start, i.e. < originPos)
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128 int originBlockOverlap = Math.min(originBlockLen, originBlockEnd - blockStart);
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129 assert originBlockOverlap > 0;
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130 // eat as much as there's left in the block being copied
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131 int originBlockConsumed = Math.min(originBlockOverlap, targetBlockLen);
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132 int originBlockLine = t.at(2);
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133 if (originPos < blockStart) {
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134 originBlockLine += originBlockLen-originBlockOverlap;
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135 }
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136 // copy fragment of original block;
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137 current.add(originBlockConsumed, t.at(1), originBlockLine);
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138 targetBlockLen -= originBlockConsumed;
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139 if (targetBlockLen == 0) {
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140 break;
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141 }
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142 }
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143 originPos += originBlockLen;
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144 }
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145 }
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146 }