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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2000, 2007 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.jface.text.projection;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.BadPositionCategoryException;
import org.eclipse.jface.text.DefaultPositionUpdater;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.Position;
/**
* The position updater used to adapt the segments of a projection document to
* changes of the master document. Depending on the flags set on a segment, a
* segment is either extended to shifted if an insertion happens at a segment's
* offset. The last segment is extended if an insert operation happens at the
* end of the segment.
*
* @since 3.0
*/
class SegmentUpdater extends DefaultPositionUpdater {
private Segment fNextSegment= null;
private boolean fIsProjectionChange= false;
/**
* Creates the segment updater for the given category.
*
* @param segmentCategory the position category used for managing the segments of a projection document
*/
protected SegmentUpdater(String segmentCategory) {
super(segmentCategory);
}
@Override
public void update(DocumentEvent event) {
Assert.isTrue(event instanceof ProjectionDocumentEvent);
fIsProjectionChange= ((ProjectionDocumentEvent) event).getChangeType() == ProjectionDocumentEvent.PROJECTION_CHANGE;
try {
Position[] category= event.getDocument().getPositions(getCategory());
fOffset= event.getOffset();
fLength= event.getLength();
fReplaceLength= (event.getText() == null ? 0 : event.getText().length());
fDocument= event.getDocument();
for (int i= 0; i < category.length; i++) {
fPosition= category[i];
Assert.isTrue(fPosition instanceof Segment);
if (i < category.length - 1)
fNextSegment= (Segment) category[i + 1];
else
fNextSegment= null;
fOriginalPosition.offset= fPosition.offset;
fOriginalPosition.length= fPosition.length;
if (notDeleted())
adaptToReplace();
}
} catch (BadPositionCategoryException x) {
// do nothing
}
}
@Override
protected void adaptToInsert() {
Segment segment= (Segment) fPosition;
int myStart= segment.offset;
int myEnd= segment.offset + segment.length - (segment.isMarkedForStretch || fNextSegment == null || isAffectingReplace() ? 0 : 1);
myEnd= Math.max(myStart, myEnd);
int yoursStart= fOffset;
try {
if (myEnd < yoursStart)
return;
if (segment.isMarkedForStretch) {
Assert.isTrue(fIsProjectionChange);
segment.isMarkedForShift= false;
if (fNextSegment != null) {
fNextSegment.isMarkedForShift= true;
fNextSegment.isMarkedForStretch= false;
}
}
if (fLength <= 0) {
if (myStart < (yoursStart + (segment.isMarkedForShift ? 0 : 1)))
fPosition.length += fReplaceLength;
else
fPosition.offset += fReplaceLength;
} else {
if (myStart <= yoursStart && fOriginalPosition.offset <= yoursStart)
fPosition.length += fReplaceLength;
else
fPosition.offset += fReplaceLength;
}
} finally {
segment.clearMark();
}
}
}