Mercurial > projects > dwt-addons
annotate dwtx/jface/internal/text/revisions/ChangeRegion.d @ 153:f70d9508c95c
Fix java Collection imports
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 25 Aug 2008 00:27:31 +0200 |
| parents | 75302ef3f92f |
| children | 3678e4f1a766 |
| rev | line source |
|---|---|
| 129 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2006 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 *******************************************************************************/ | |
| 13 module dwtx.jface.internal.text.revisions.ChangeRegion; | |
| 14 | |
| 131 | 15 import dwtx.jface.internal.text.revisions.HunkComputer; // packageimport |
| 16 import dwtx.jface.internal.text.revisions.LineIndexOutOfBoundsException; // packageimport | |
| 17 import dwtx.jface.internal.text.revisions.Hunk; // packageimport | |
| 18 import dwtx.jface.internal.text.revisions.Colors; // packageimport | |
| 19 import dwtx.jface.internal.text.revisions.Range; // packageimport | |
| 20 import dwtx.jface.internal.text.revisions.RevisionPainter; // packageimport | |
| 21 import dwtx.jface.internal.text.revisions.RevisionSelectionProvider; // packageimport | |
| 22 | |
| 23 | |
| 129 | 24 import dwt.dwthelper.utils; |
| 25 | |
|
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26 import dwtx.dwtxhelper.Collection; |
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27 |
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28 |
| 129 | 29 |
| 30 import dwtx.core.runtime.Assert; | |
| 31 import dwtx.jface.text.revisions.Revision; | |
| 32 import dwtx.jface.text.source.ILineRange; | |
| 33 import dwtx.jface.text.source.LineRange; | |
| 34 | |
| 35 /** | |
| 36 * A change region describes a contiguous range of lines that was changed in the same revision of a | |
| 37 * document. Once it is adjusted to diff information, the originally contiguous range may be split | |
| 38 * into several ranges or even be empty. | |
| 39 * | |
| 40 * @since 3.2 | |
| 41 */ | |
| 42 public final class ChangeRegion { | |
| 146 | 43 private const Revision fRevision; |
| 44 private const ILineRange fLines; | |
| 45 private const List fAdjusted= new LinkedList(); | |
| 129 | 46 |
| 47 /** | |
| 48 * Creates a new change region for the given revision and line range. | |
| 49 * | |
| 50 * @param revision the revision of the new region | |
| 51 * @param lines the line range of the new region | |
| 52 * @throws IndexOutOfBoundsException if the line range is not well-formed | |
| 53 */ | |
|
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54 public this(Revision revision, ILineRange lines) { |
| 129 | 55 Assert.isLegal(revision !is null); |
| 56 Assert.isLegal(lines !is null); | |
| 57 fLines= Range.copy(lines); | |
| 58 fRevision=revision; | |
| 59 clearDiff(); | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * Returns the revision that this region belongs to. | |
| 64 * | |
| 65 * @return the revision that this region belongs to | |
| 66 */ | |
| 67 public Revision getRevision() { | |
| 68 return fRevision; | |
| 69 } | |
| 70 | |
| 71 /** | |
| 72 * Returns the original (before applying diff information) line range of this change region. | |
| 73 * | |
| 74 * @return the original (before applying diff information) line range of this change region | |
| 75 */ | |
| 76 public ILineRange getOriginalRange() { | |
| 77 return fLines; | |
| 78 } | |
| 79 | |
| 80 /** | |
| 81 * Returns the list of {@link ILineRange}s of this change region for which the revision | |
| 82 * information is still valid. | |
| 83 * | |
| 84 * @return the list of adjusted line ranges | |
| 85 */ | |
| 86 public List getAdjustedRanges() { | |
| 87 return fAdjusted; | |
| 88 } | |
| 89 | |
| 90 /** | |
| 91 * Returns the line coverage of the adjusted ranges, an empty range if the coverage is empty. | |
| 92 * | |
| 93 * @return the line coverage of the adjusted ranges | |
| 94 */ | |
| 95 public ILineRange getAdjustedCoverage() { | |
| 96 if (fAdjusted.isEmpty()) | |
| 97 return new LineRange(fLines.getStartLine(), 0); | |
| 98 | |
| 134 | 99 Range first= cast(Range) fAdjusted.get(0); |
| 100 Range last= cast(Range) fAdjusted.get(fAdjusted.size() - 1); | |
| 129 | 101 |
| 102 return Range.createAbsolute(first.start(), last.end()); | |
| 103 } | |
| 104 | |
| 105 /** | |
| 106 * Clears any adjusted ranges, restoring the original range. | |
| 107 */ | |
| 108 public void clearDiff() { | |
| 109 fAdjusted.clear(); | |
| 110 fAdjusted.add(Range.copy(fLines)); | |
| 111 } | |
| 112 | |
| 113 /** | |
| 114 * Adjusts this change region to a diff hunk. This will change the adjusted ranges. | |
| 115 * | |
| 116 * @param hunk the diff hunk to adjust to | |
| 117 */ | |
| 118 public void adjustTo(Hunk hunk) { | |
| 119 for (ListIterator it= fAdjusted.listIterator(); it.hasNext();) { | |
| 134 | 120 Range range= cast(Range) it.next(); |
| 129 | 121 |
| 122 // do we need a split? | |
| 123 int unchanged= getUnchanged(hunk, range.start()); | |
| 124 if (unchanged > 0) { | |
| 125 if (unchanged >= range.length()) | |
| 126 continue; | |
| 127 range= range.split(unchanged); | |
| 128 it.add(range); | |
| 129 it.previous(); it.next(); // needed so we can remove below | |
| 130 } | |
| 131 | |
| 132 int line= range.start(); | |
| 133 Assert.isTrue(hunk.line <= line); | |
| 134 | |
| 135 // by how much do we shrink? | |
| 136 int overlap= getOverlap(hunk, line); | |
| 137 if (overlap >= range.length()) { | |
| 138 it.remove(); | |
| 139 continue; | |
| 140 } | |
| 141 | |
| 142 // by how much do we move? | |
| 143 range.moveBy(hunk.delta + overlap); | |
| 144 range.resizeBy(-overlap); | |
| 145 } | |
| 146 | |
| 147 } | |
| 148 | |
| 149 private int getUnchanged(Hunk hunk, int line) { | |
| 150 return Math.max(0, hunk.line - line); | |
| 151 } | |
| 152 | |
| 153 /* | |
| 154 * Returns the number of lines after line that the hunk reports as changed. | |
| 155 */ | |
| 156 private int getOverlap(Hunk hunk, int line) { | |
| 157 | |
| 158 int deltaLine= hunk.line + hunk.changed; | |
| 159 if (hunk.delta >= 0) { | |
| 160 if (deltaLine <= line) | |
| 161 return 0; | |
| 162 return deltaLine - line; | |
| 163 } | |
| 164 | |
| 165 // hunk.delta < 0 | |
| 166 int hunkEnd= deltaLine - hunk.delta; | |
| 167 int cutCount= hunkEnd - line; | |
| 168 return Math.max(0, cutCount); | |
| 169 } | |
| 170 | |
| 171 /* | |
| 172 * @see java.lang.Object#toString() | |
| 173 */ | |
| 174 public String toString() { | |
| 175 return "ChangeRegion [" + fRevision.toString() + ", [" + fLines.getStartLine() + "+" + fLines.getNumberOfLines() + ")]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ | |
| 176 } | |
| 177 } |