/******************************************************************************* | |
* Copyright (c) 2011 IBM Corporation and others. | |
* | |
* This program and the accompanying materials | |
* are made available under the terms of the Eclipse Public License 2.0 | |
* which accompanies this distribution, and is available at | |
* https://www.eclipse.org/legal/epl-2.0/ | |
* | |
* SPDX-License-Identifier: EPL-2.0 | |
* | |
* Contributors: | |
* IBM Corporation - initial API and implementation | |
*******************************************************************************/ | |
package org.eclipse.team.internal.ui.synchronize; | |
import java.util.regex.Pattern; | |
import org.eclipse.compare.internal.DocLineComparator; | |
import org.eclipse.compare.rangedifferencer.RangeDifference; | |
import org.eclipse.jface.text.BadLocationException; | |
import org.eclipse.jface.text.IDocument; | |
import org.eclipse.jface.text.IRegion; | |
/** | |
* Compute differences between local and remote contents and checks if all match | |
* the given regex pattern. If there is at least one diff whose either left or | |
* right side don't match the pattern | |
* <code>{@link #compareRangeDifferences(RangeDifference[], IDocument, IDocument)}</code> | |
* returns <code>false</code>. | |
*/ | |
public class RegexDiffComparator extends RangeDifferenceComparator { | |
private Pattern pattern; | |
public RegexDiffComparator(Pattern pattern, boolean ignoreWhitespace) { | |
super(ignoreWhitespace); | |
this.pattern = pattern; | |
} | |
@Override | |
protected boolean compareRangeDifferences(RangeDifference[] ranges, | |
IDocument lDoc, IDocument rDoc) { | |
try { | |
for (int i = 0; i < ranges.length; i++) { | |
RangeDifference diff = ranges[i]; | |
if (diff.kind() == RangeDifference.NOCHANGE) | |
continue; | |
DocLineComparator sleft = new DocLineComparator(lDoc, null, | |
shouldIgnoreWhitespace()); | |
DocLineComparator sright = new DocLineComparator(rDoc, null, | |
shouldIgnoreWhitespace()); | |
IRegion lRegion = lDoc.getLineInformation(diff.leftStart()); | |
int leftEnd = sleft.getTokenStart(diff.leftStart() | |
+ diff.leftLength()); | |
String left = lDoc.get(lRegion.getOffset(), | |
leftEnd - lRegion.getOffset()); | |
IRegion rRegion = rDoc.getLineInformation(diff.rightStart()); | |
int rightEnd = sright.getTokenStart(diff.rightStart() | |
+ diff.rightLength()); | |
String right = rDoc.get(rRegion.getOffset(), | |
rightEnd - rRegion.getOffset()); | |
boolean m1 = pattern.matcher(left).matches(); | |
boolean m2 = pattern.matcher(right).matches(); | |
if (!m1 && !m2) | |
// it's false that all diffs match the pattern | |
return false; | |
} | |
} catch (BadLocationException e) { | |
// ignore | |
} | |
return true; | |
} | |
} |