File DefaultInlineDiffDisplayer.java
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Classes
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|---|---|---|---|---|---|---|---|
| DefaultInlineDiffDisplayer | 42 | 26 | 0% | 8 | 2 |
Contributing tests
This file is covered by 14 tests.
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| 1 | /* | |
| 2 | * See the NOTICE file distributed with this work for additional | |
| 3 | * information regarding copyright ownership. | |
| 4 | * | |
| 5 | * This is free software; you can redistribute it and/or modify it | |
| 6 | * under the terms of the GNU Lesser General Public License as | |
| 7 | * published by the Free Software Foundation; either version 2.1 of | |
| 8 | * the License, or (at your option) any later version. | |
| 9 | * | |
| 10 | * This software is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | * Lesser General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU Lesser General Public | |
| 16 | * License along with this software; if not, write to the Free | |
| 17 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| 18 | * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | |
| 19 | */ | |
| 20 | package org.xwiki.diff.display.internal; | |
| 21 | ||
| 22 | import java.util.ArrayList; | |
| 23 | import java.util.List; | |
| 24 | ||
| 25 | import javax.inject.Singleton; | |
| 26 | ||
| 27 | import org.xwiki.component.annotation.Component; | |
| 28 | import org.xwiki.diff.Delta; | |
| 29 | import org.xwiki.diff.DiffResult; | |
| 30 | import org.xwiki.diff.display.InlineDiffChunk; | |
| 31 | import org.xwiki.diff.display.InlineDiffChunk.Type; | |
| 32 | import org.xwiki.diff.display.InlineDiffDisplayer; | |
| 33 | ||
| 34 | /** | |
| 35 | * Default {@link InlineDiffDisplayer} implementation. | |
| 36 | * | |
| 37 | * @version $Id: 2eae169f8a29b13c639be6314d1a879a68bd8faa $ | |
| 38 | * @since 4.1RC1 | |
| 39 | */ | |
| 40 | @Component | |
| 41 | @Singleton | |
| 42 | public class DefaultInlineDiffDisplayer implements InlineDiffDisplayer | |
| 43 | { | |
| 44 | 25 |  @Override |
| 45 | public <E> List<InlineDiffChunk<E>> display(DiffResult<E> diffResult) | |
| 46 | { | |
| 47 | 25 | List<E> previous = diffResult.getPrevious(); |
| 48 | 25 | List<InlineDiffChunk<E>> chunks = new ArrayList<InlineDiffChunk<E>>(); |
| 49 | ||
| 50 | 25 | Delta<E> lastDelta = null; |
| 51 | 25 | for (Delta<E> delta : diffResult.getPatch()) { |
| 52 | // Add a chunk with the unmodified elements between the last delta and the current one. | |
| 53 | 33 | int contextStart = lastDelta == null ? 0 : lastDelta.getPrevious().getLastIndex() + 1; |
| 54 | 33 | int contextEnd = delta.getPrevious().getIndex(); |
| 55 | 33 | if (contextStart < contextEnd) { |
| 56 | 27 | chunks.add(new InlineDiffChunk<E>(Type.UNMODIFIED, previous.subList(contextStart, contextEnd))); |
| 57 | } | |
| 58 | ||
| 59 | // Add changed chunks. | |
| 60 | 33 | switch (delta.getType()) { |
| 61 | 12 | case CHANGE: |
| 62 | 12 | chunks.add(new InlineDiffChunk<E>(Type.DELETED, delta.getPrevious().getElements())); |
| 63 | 12 | chunks.add(new InlineDiffChunk<E>(Type.ADDED, delta.getNext().getElements())); |
| 64 | 12 | break; |
| 65 | 6 | case DELETE: |
| 66 | 6 | chunks.add(new InlineDiffChunk<E>(Type.DELETED, delta.getPrevious().getElements())); |
| 67 | 6 | break; |
| 68 | 15 | case INSERT: |
| 69 | 15 | chunks.add(new InlineDiffChunk<E>(Type.ADDED, delta.getNext().getElements())); |
| 70 | 15 | break; |
| 71 | 0 | default: |
| 72 | 0 | break; |
| 73 | } | |
| 74 | ||
| 75 | 33 | lastDelta = delta; |
| 76 | } | |
| 77 | ||
| 78 | // Add the final chunk with the unmodified elements after the last delta. | |
| 79 | 25 | int contextStart = lastDelta == null ? 0 : lastDelta.getPrevious().getLastIndex() + 1; |
| 80 | 25 | if (contextStart < previous.size()) { |
| 81 | 13 | chunks.add(new InlineDiffChunk<E>(Type.UNMODIFIED, previous.subList(contextStart, previous.size()))); |
| 82 | } | |
| 83 | ||
| 84 | 25 | return chunks; |
| 85 | } | |
| 86 | } |