package fr.zenexity.pdt.editors;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentPartitioner;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.jface.text.TypedRegion;
import org.eclipse.ui.editors.text.FileDocumentProvider;
public class DocumentProvider extends FileDocumentProvider {
Editor editor;
IDocument document;
public DocumentProvider(Editor editor) {
this.editor = editor;
}
@Override
public String getDefaultEncoding() {
return "utf-8";
}
@Override
protected IDocument createDocument(Object element) throws CoreException {
try {
document = super.createDocument(element);
} catch (Exception e) {
System.out.println(this.getClass().getName() + ": " + e.getMessage());
}
if (document != null) {
IDocumentPartitioner partitioner = new IDocumentPartitioner() {
@Override
public ITypedRegion getPartition(int offset) {
for(ITypedRegion region : computePartitioning(offset, 0)) {
if(region.getOffset() + region.getLength() >= offset) {
return region;
}
}
return null;
}
@Override
public String[] getLegalContentTypes() {
return editor.getTypes();
}
@Override
public String getContentType(int offset) {
return getPartition(offset).getType();
}
@Override
public boolean documentChanged(DocumentEvent event) {
return true;
}
@Override
public void documentAboutToBeChanged(DocumentEvent event) {
}
@Override
public void disconnect() {
}
@Override
public void connect(IDocument document) {
document.addPositionCategory(IDocument.DEFAULT_CATEGORY);
document.setDocumentPartitioner(this);
}
@Override
public ITypedRegion[] computePartitioning(int offset, int length) {
List<ITypedRegion> regions = new ArrayList<ITypedRegion>();
editor.reset();
while (!editor.eof) {
ITypedRegion current = editor.nextToken();
int start = current.getOffset();
int stop = current.getOffset() + current.getLength();
if (start >= offset && stop <= offset + length) {
// Region included in the zone
regions.add(current);
} else if (start < offset && stop >= offset) {
// Overlap on the beginning of the zone
regions.add(new TypedRegion(offset, (stop - offset), current.getType()));
} else if (start <= offset && stop > offset + length) {
// XXX this condition actually contains the previous one. problem? --bran
// Overlap on the end of the zone
regions.add(new TypedRegion(start, (offset + length - start), current.getType()));
}
else if (start > offset + length ) { // bran cut off
break;
}
}
return regions.toArray(new ITypedRegion[regions.size()]);
}
};
partitioner.connect(document);
}
return document;
}
}