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/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.search2.internal.ui.text;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.filebuffers.IFileBuffer;
import org.eclipse.core.filebuffers.ITextFileBuffer;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.text.source.IAnnotationModelExtension;
import org.eclipse.search.internal.ui.SearchPlugin;
import org.eclipse.search.ui.text.Match;
import org.eclipse.search2.internal.ui.InternalSearchUI;
import org.eclipse.search2.internal.ui.SearchMessages;
public class AnnotationHighlighter extends Highlighter {
private IAnnotationModel fModel;
private IDocument fDocument;
private Map<Match, Annotation> fMatchesToAnnotations;
public AnnotationHighlighter(IAnnotationModel model, IDocument document) {
fModel= model;
fDocument= document;
fMatchesToAnnotations= new HashMap<>();
}
@Override
public void addHighlights(Match[] matches) {
HashMap<Annotation, Position> map= new HashMap<>(matches.length);
for (int i= 0; i < matches.length; i++) {
int offset= matches[i].getOffset();
int length= matches[i].getLength();
if (offset >= 0 && length >= 0) {
Position position= createPosition(matches[i]);
if (position != null) {
Annotation annotation= matches[i].isFiltered()
? new Annotation(SearchPlugin.FILTERED_SEARCH_ANNOTATION_TYPE, true, null)
: new Annotation(SearchPlugin.SEARCH_ANNOTATION_TYPE, true, null);
fMatchesToAnnotations.put(matches[i], annotation);
map.put(annotation, position);
}
}
}
addAnnotations(map);
}
private Position createPosition(Match match) {
Position position= InternalSearchUI.getInstance().getPositionTracker().getCurrentPosition(match);
if (position == null)
position= new Position(match.getOffset(), match.getLength());
else
// need to clone position, can't have it twice in a document.
position= new Position(position.getOffset(), position.getLength());
if (match.getBaseUnit() == Match.UNIT_LINE) {
if (fDocument != null) {
try {
position= PositionTracker.convertToCharacterPosition(position, fDocument);
} catch (BadLocationException e) {
// ignore, match must be outdated
return null;
}
} else {
SearchPlugin.log(new Status(IStatus.ERROR, SearchPlugin.getID(), 0, SearchMessages.AnnotationHighlighter_error_noDocument, null));
return null;
}
}
return position;
}
@Override
public void removeHighlights(Match[] matches) {
HashSet<Annotation> annotations= new HashSet<>(matches.length);
for (int i= 0; i < matches.length; i++) {
Annotation annotation= fMatchesToAnnotations.remove(matches[i]);
if (annotation != null) {
annotations.add(annotation);
}
}
removeAnnotations(annotations);
}
@Override
public void removeAll() {
Collection<Annotation> matchSet= fMatchesToAnnotations.values();
removeAnnotations(matchSet);
fMatchesToAnnotations.clear();
}
private void addAnnotations(Map<Annotation, Position> annotationToPositionMap) {
if (fModel instanceof IAnnotationModelExtension) {
IAnnotationModelExtension ame= (IAnnotationModelExtension) fModel;
ame.replaceAnnotations(new Annotation[0], annotationToPositionMap);
} else {
Set<Entry<Annotation, Position>> entrySet = annotationToPositionMap.entrySet();
for (Entry<Annotation, Position> entry : entrySet) {
fModel.addAnnotation(entry.getKey(), entry.getValue());
}
}
}
/**
* Removes annotations from the given annotation model. The default implementation works for editors that
* implement <code>ITextEditor</code>.
* Subclasses may override this method.
* @param annotations A set containing the annotations to be removed.
* @see Annotation
*/
private void removeAnnotations(Collection<Annotation> annotations) {
if (fModel instanceof IAnnotationModelExtension) {
IAnnotationModelExtension ame= (IAnnotationModelExtension) fModel;
Annotation[] annotationArray= new Annotation[annotations.size()];
ame.replaceAnnotations(annotations.toArray(annotationArray), Collections.emptyMap());
} else {
for (Iterator<Annotation> iter= annotations.iterator(); iter.hasNext();) {
Annotation element= iter.next();
fModel.removeAnnotation(element);
}
}
}
@Override
protected void handleContentReplaced(IFileBuffer buffer) {
if (!(buffer instanceof ITextFileBuffer))
return;
ITextFileBuffer textBuffer= (ITextFileBuffer) buffer;
if (fDocument != null && fDocument.equals(textBuffer.getDocument())) {
Set<Match> allMatches= fMatchesToAnnotations.keySet();
Match[] matchesCopy= allMatches.toArray(new Match[allMatches.size()]);
removeAll();
addHighlights(matchesCopy);
}
}
}
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