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/*****************************************************************************
* Copyright (c) 2015 CEA LIST.
*
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Jeremie Tatibouet
*
*****************************************************************************/
package org.eclipse.papyrus.uml.alf.text.representation.compare;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.compare.contentmergeviewer.ITokenComparator;
import org.eclipse.compare.contentmergeviewer.TokenComparator;
import org.eclipse.compare.rangedifferencer.IRangeComparator;
import org.eclipse.compare.rangedifferencer.RangeDifference;
import org.eclipse.compare.rangedifferencer.RangeDifferencer;
import org.eclipse.papyrus.uml.alf.text.representation.AlfTextualRepresentation;
import org.eclipse.swt.graphics.Point;
/**
* This class represent a difference between regions of two representations
*/
public class LineDifference extends RegionDifference implements IAdvancedDifference {
public LineDifference(RangeDifference d, AlfTextualRepresentation leftR,
AlfTextualRepresentation rightR, IRangeComparator leftC, IRangeComparator rightC) {
super(d, leftR, rightR, leftC, rightC);
}
public String getLeftState() {
Point position = this.getLeftFragmentPosition();
return this.leftR.getContent().substring(position.x, position.y);
}
public String getRightState() {
Point position = this.getRightFragmentPosition();
return this.rightR.getContent().substring(position.x, position.y);
}
public Point getLeftFragmentPosition() {
String[] leftLines = this.leftR.getContent().split(StringUtil.EOL);
int startIndex = 0;
for (int i = 0; i < this.leftStart; i++) {
startIndex += leftLines[i].length() + 1;
}
int endIndex = startIndex;
for (int i = this.leftStart; i < this.leftEnd(); i++) {
if (this.leftEnd() == leftLines.length) {
endIndex += leftLines[i].length();
} else {
endIndex += leftLines[i].length() + 1;
}
}
return new Point(startIndex, endIndex);
}
public Point getRightFragmentPosition() {
String[] rightLines = this.rightR.getContent().split(StringUtil.EOL);
int startIndex = 0;
for (int i = 0; i < this.rightStart; i++) {
startIndex += rightLines[i].length() + 1;
}
int endIndex = startIndex;
for (int i = this.rightStart; i < this.rightEnd(); i++) {
if (this.rightEnd() == rightLines.length) {
endIndex += rightLines[i].length();
} else {
endIndex += rightLines[i].length() + 1;
}
}
return new Point(startIndex, endIndex);
}
/**
* return all the differences between tokens present in the left line and
* those present at the right line
*
* @return tokenDifferences - the list of differences
*/
public List<TokenDifference> getChildren() {
ITokenComparator leftTokenComparator = new TokenComparator(this.getLeftState());
ITokenComparator rightTokenComparator = new TokenComparator(this.getRightState());
AlfTextualRepresentation leftRepresentation = new AlfTextualRepresentation(null);
leftRepresentation.setText(this.getLeftState());
AlfTextualRepresentation rightRepresentation = new AlfTextualRepresentation(null);
leftRepresentation.setText(this.getRightState());
RangeDifference[] differences = RangeDifferencer.findDifferences(leftTokenComparator, rightTokenComparator);
List<TokenDifference> tokenDifferences = new ArrayList<TokenDifference>();
for (RangeDifference difference : differences) {
tokenDifferences.add(new TokenDifference(difference, leftRepresentation, rightRepresentation, leftTokenComparator, rightTokenComparator));
}
return tokenDifferences;
}
}
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