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annotate src/org/tmatesoft/hg/internal/AnnotateFacility.java @ 542:a71a05ec11bc

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Towards annotate/blame support: general outline of the functionality
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 14 Feb 2013 16:36:13 +0100
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children 1e95f48d9886
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a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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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,
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
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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.ChunkSequence;
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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.repo.HgRepository;
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26 import org.tmatesoft.hg.util.CancelledException;
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27
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28 /**
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 @Experimental(reason="work in progress")
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34 public class AnnotateFacility {
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35
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36 public void annotate(HgDataFile df, int changestRevisionIndex, Inspector insp) {
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37 Nodeid fileRev = df.getRepo().getManifest().getFileRevision(changestRevisionIndex, df.getPath());
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38 int fileRevIndex = df.getRevisionIndex(fileRev);
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39 int[] fileRevParents = new int[2];
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40 df.parents(fileRevIndex, fileRevParents, null, null);
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41 if (fileRevParents[0] != NO_REVISION && fileRevParents[1] != NO_REVISION) {
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42 // merge
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43 } else if (fileRevParents[0] == fileRevParents[1]) {
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44 // may be equal iff both are unset
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45 assert fileRevParents[0] == NO_REVISION;
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46 // everything added
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47 insp.added(null);
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48 } else {
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49 int soleParent = fileRevParents[0] == NO_REVISION ? fileRevParents[1] : fileRevParents[0];
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50 assert soleParent != NO_REVISION;
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51 try {
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52 ByteArrayChannel c1, c2;
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53 df.content(soleParent, c1 = new ByteArrayChannel());
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54 df.content(fileRevIndex, c2 = new ByteArrayChannel());
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55 int parentChangesetRevIndex = df.getChangesetRevisionIndex(soleParent);
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56 PatchGenerator pg = new PatchGenerator();
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57 pg.init(c1.toArray(), c2.toArray());
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58 pg.findMatchingBlocks(new BlameBlockInspector(insp));
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59 } catch (CancelledException ex) {
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60 // TODO likely it was bad idea to throw cancelled exception from content()
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61 // deprecate and provide alternative?
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62 HgInvalidStateException ise = new HgInvalidStateException("ByteArrayChannel never throws CancelledException");
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63 ise.initCause(ex);
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64 throw ise;
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65 }
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66 }
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67 }
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68
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69 @Callback
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70 public interface Inspector {
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71 void same(Block block);
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72 void added(AddBlock block);
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73 void changed(ChangeBlock block);
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74 void deleted(DeleteBlock block);
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75 }
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76
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77 public interface Block {
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78 // boolean isMergeRevision();
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79 // int fileRevisionIndex();
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80 // int originFileRevisionIndex();
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81 // String[] lines();
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82 // byte[] data();
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83 }
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84
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85 public interface AddBlock extends Block {
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86 int firstAddedLine();
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87 int totalAddedLines();
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88 String[] addedLines();
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89 }
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90 public interface DeleteBlock extends Block {
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91 int firstRemovedLine();
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92 int totalRemovedLines();
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93 String[] removedLines();
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94 }
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95 public interface ChangeBlock extends AddBlock, DeleteBlock {
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96 }
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97
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98 static class BlameBlockInspector extends PatchGenerator.DeltaInspector {
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99 private final Inspector insp;
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100
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101 public BlameBlockInspector(Inspector inspector) {
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102 assert inspector != null;
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103 insp = inspector;
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104 }
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105
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106 @Override
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107 protected void changed(int s1From, int s1To, int s2From, int s2To) {
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108 insp.changed(new BlockImpl2(seq1, seq2, s1From, s1To-s1From, s2From, s2To - s2From));
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109 }
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110
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111 @Override
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112 protected void added(int s1InsertPoint, int s2From, int s2To) {
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113 insp.added(new BlockImpl2(null, seq2, -1, -1, s2From, s2To - s2From));
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114 }
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115
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116 @Override
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117 protected void deleted(int s1From, int s1To) {
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118 insp.deleted(new BlockImpl2(seq1, null, s1From, s1To - s1From, -1, -1));
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119 }
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120
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121 @Override
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122 protected void unchanged(int s1From, int s2From, int length) {
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123 insp.same(new BlockImpl(seq2, s2From, length));
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124 }
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125 }
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126
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127 static class BlockImpl implements Block {
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128 private final ChunkSequence seq;
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129 private final int start;
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130 private final int length;
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131
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132 BlockImpl() {
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133 // FIXME delete this cons
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134 seq = null;
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135 start = length = -1;
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136 }
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137
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138 BlockImpl(ChunkSequence s, int blockStart, int blockLength) {
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139 seq = s;
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140 start = blockStart;
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141 length = blockLength;
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142 }
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143
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144 }
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145
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146 static class BlockImpl2 implements ChangeBlock {
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147
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148 private final ChunkSequence oldSeq;
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149 private final ChunkSequence newSeq;
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150 private final int s1Start;
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151 private final int s1Len;
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152 private final int s2Start;
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153 private final int s2Len;
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154
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155 public BlockImpl2(ChunkSequence s1, ChunkSequence s2, int s1Start, int s1Len, int s2Start, int s2Len) {
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156 oldSeq = s1;
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157 newSeq = s2;
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158 this.s1Start = s1Start;
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159 this.s1Len = s1Len;
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160 this.s2Start = s2Start;
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161 this.s2Len = s2Len;
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162 }
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163
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164 public int firstAddedLine() {
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165 return s2Start;
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166 }
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167
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168 public int totalAddedLines() {
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169 return s2Len;
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170 }
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171
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172 public String[] addedLines() {
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173 return generateLines(totalAddedLines(), firstAddedLine());
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174 }
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175
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176 public int firstRemovedLine() {
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177 return s1Start;
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178 }
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179
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180 public int totalRemovedLines() {
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181 return s1Len;
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182 }
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183
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184 public String[] removedLines() {
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185 return generateLines(totalRemovedLines(), firstRemovedLine());
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186 }
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187
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188 private String[] generateLines(int count, int startFrom) {
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189 String[] rv = new String[count];
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190 for (int i = 0; i < count; i++) {
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191 rv[i] = String.format("LINE %d", startFrom + i);
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192 }
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193 return rv;
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194 }
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195 }
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196 }