/*******************************************************************************
* Copyright (c) 2008 Vlad Dumitrescu 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:
* Vlad Dumitrescu
*******************************************************************************/
package org.erlide.ui.editors.erl.correction;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.quickassist.IQuickAssistInvocationContext;
import org.eclipse.jface.text.quickassist.IQuickAssistProcessor;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.ui.IMarkerResolution;
import org.eclipse.ui.IMarkerResolutionGenerator;
import org.eclipse.ui.texteditor.MarkerAnnotation;
import org.erlide.engine.model.builder.MarkerUtils;
import org.erlide.util.ErlLogger;
import com.google.common.collect.Lists;
public class ErlangQuickAssistProcessor implements IQuickAssistProcessor,
IMarkerResolutionGenerator {
private final ErlangQuickFixCollector collector = new ErlangQuickFixCollector();
@Override
public boolean canAssist(final IQuickAssistInvocationContext invocationContext) {
return collector.hasAssists(invocationContext);
}
@Override
public boolean canFix(final Annotation annotation) {
return annotation instanceof MarkerAnnotation && !annotation.isMarkedDeleted();
}
@Override
public ICompletionProposal[] computeQuickAssistProposals(
final IQuickAssistInvocationContext invocationContext) {
final List<ICompletionProposal> result = computeProposals(invocationContext);
return result.toArray(new ICompletionProposal[result.size()]);
}
@Override
public String getErrorMessage() {
return null;
}
@Override
public IMarkerResolution[] getResolutions(final IMarker marker) {
return collector.getResolutions(marker);
}
private List<ICompletionProposal> computeProposals(
final IQuickAssistInvocationContext invocationContext) {
final ISourceViewer sourceViewer = invocationContext.getSourceViewer();
final Iterator<Annotation> iter = sourceViewer.getAnnotationModel()
.getAnnotationIterator();
final List<ICompletionProposal> result = Lists.newArrayList();
while (iter.hasNext()) {
final Annotation annotation = iter.next();
if (annotation instanceof MarkerAnnotation) {
final MarkerAnnotation markerAnnotation = (MarkerAnnotation) annotation;
final IMarker marker = markerAnnotation.getMarker();
try {
if (!marker.getType().equals(MarkerUtils.PROBLEM_MARKER)) {
continue;
}
final int invocationLine = sourceViewer.getDocument()
.getLineOfOffset(invocationContext.getOffset());
final int markerLine = marker.getAttribute(IMarker.LINE_NUMBER, -1) - 1;
if (invocationLine == markerLine) {
final IMarkerResolution[] qfixes = getResolutions(marker);
for (final IMarkerResolution qfix : qfixes) {
result.add(new MarkerResolutionProposal(qfix, marker));
}
}
} catch (final BadLocationException e) {
ErlLogger.debug(e);
} catch (final CoreException e) {
ErlLogger.debug(e);
}
}
}
result.addAll(collector.getAssists(invocationContext));
return result;
}
}