/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.eclipse.editors;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.drools.eclipse.DroolsEclipsePlugin;
import org.drools.eclipse.preferences.IDroolsConstants;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.reconciler.DirtyRegion;
import org.eclipse.jface.text.reconciler.IReconcilingStrategy;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.widgets.Display;
public class DRLReconcilingStrategy implements IReconcilingStrategy {
private static final Pattern RULE_PATTERN = Pattern.compile("\\n\\s*(rule\\s+.*?\\n\\s*end)", Pattern.DOTALL);
private static final Pattern TEMPLATE_PATTERN = Pattern.compile("\\n\\s*(template\\s+.*?\\n\\s*end)", Pattern.DOTALL);
private static final Pattern QUERY_PATTERN = Pattern.compile("\\n\\s*(query\\s+.*?\\n\\s*end)", Pattern.DOTALL);
private static final Pattern FUNCTION_PATTERN = Pattern.compile("\\n\\s*(function\\s+[^\\{]*\\{)", Pattern.DOTALL);
private static final Pattern IMPORT_PATTERN = Pattern.compile("\\n\\s*((\\s*import\\s+[^\\s;]+;?[\\t\\x0B\\f\\r]*\\n)+)", Pattern.DOTALL);
private ISourceViewer sourceViewer;
private AbstractRuleEditor editor;
private IDocument document;
private boolean folding;
public DRLReconcilingStrategy(ISourceViewer sourceViewer, final AbstractRuleEditor editor) {
this.sourceViewer = sourceViewer;
this.editor = editor;
IPreferenceStore preferenceStore = DroolsEclipsePlugin.getDefault().getPreferenceStore();
folding = preferenceStore.getBoolean(IDroolsConstants.EDITOR_FOLDING);
preferenceStore.addPropertyChangeListener(new IPropertyChangeListener() {
public void propertyChange(PropertyChangeEvent event) {
if (IDroolsConstants.EDITOR_FOLDING.equals(event.getProperty())) {
folding = ((Boolean) event.getNewValue()).booleanValue();
if (folding) {
reconcile();
} else {
Display.getDefault().asyncExec(new Runnable() {
public void run() {
editor.updateFoldingStructure(new ArrayList());
}
});
}
}
}
});
}
public void setDocument(IDocument document) {
this.document = document;
reconcile();
}
public void reconcile(DirtyRegion dirtyRegion, IRegion region) {
reconcile();
}
public void reconcile(IRegion region) {
reconcile();
}
private void reconcile() {
if (document != null) {
String s = document.get();
if (folding) {
calculateFolding(s);
}
// IFile file = ((IFileEditorInput) input).getFile();
// IAnnotationModel annotationModel = sourceViewer.getAnnotationModel();
// removeAnnotationsFor(annotationModel);
// DroolsBuildMarker[] markers = DroolsBuilder.parseFile(file, s);
// for (int i = 0; i < markers.length; i++) {
// createAnnotation(file, annotationModel, markers[i].getText(), markers[i].getOffset(), markers[i].getLength());
// }
}
}
private static void createAnnotation(IFile file, final IAnnotationModel annotationModel, final String message, final int offset, final int length) {
Annotation annotation = new DRLProblemAnnotation(message);
Position position = new Position(0, 1);
// Position position = new Position(offset, length);
annotationModel.addAnnotation(annotation, position);
}
public static void removeAnnotationsFor(IAnnotationModel annotationModel) {
Iterator iterator = annotationModel.getAnnotationIterator();
while (iterator.hasNext()) {
Annotation annotation = (Annotation) iterator.next();
if (annotation instanceof DRLProblemAnnotation) {
annotationModel.removeAnnotation(annotation);
}
}
}
protected void calculateFolding(String input) {
// TODO replace this parsing by getting this input from the parsed rule file
final List positions = new ArrayList();
Matcher matcher = RULE_PATTERN.matcher(input);
while (matcher.find()) {
positions.add(new Position(matcher.start(1), matcher.end(1) - matcher.start(1)));
}
matcher = QUERY_PATTERN.matcher(input);
while (matcher.find()) {
positions.add(new Position(matcher.start(1), matcher.end(1) - matcher.start(1)));
}
matcher = TEMPLATE_PATTERN.matcher(input);
while (matcher.find()) {
positions.add(new Position(matcher.start(1), matcher.end(1) - matcher.start(1)));
}
matcher = IMPORT_PATTERN.matcher(input);
while (matcher.find()) {
positions.add(new Position(matcher.start(1), matcher.end(1) - matcher.start(1)));
}
matcher = FUNCTION_PATTERN.matcher(input);
while (matcher.find()) {
int start = matcher.start(1);
// TODO also take comments, strings etc. in consideration
// use JavaPairMatcher or similar
int nbOpenBrackets = 1;
for (int i = matcher.end(); i < input.length(); i++) {
if (input.charAt(i) == '{') {
nbOpenBrackets++;
} else if (input.charAt(i) == '}') {
if (--nbOpenBrackets == 0) {
positions.add(new Position(start, i - start + 1));
break;
}
}
}
}
Display.getDefault().asyncExec(new Runnable() {
public void run() {
editor.updateFoldingStructure(positions);
}
});
}
}