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/*******************************************************************************
* 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;
}
}
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