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/*******************************************************************************
* Contributors:
* Steven Spungin <steven@spungin.tv> - Bug 431735, Bug 391089
*******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common.xml;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.e4.tools.emf.ui.common.IModelResource;
import org.eclipse.e4.tools.emf.ui.internal.common.component.tabs.empty.E;
import org.eclipse.e4.ui.internal.workbench.E4XMIResource;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource.Diagnostic;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.FindReplaceDocumentAdapter;
import org.eclipse.jface.text.IDocumentListener;
import org.eclipse.jface.text.IRegion;
import org.xml.sax.InputSource;
public class EMFDocumentResourceMediator {
private IModelResource modelResource;
private Document document;
private boolean updateFromEMF;
private List<Diagnostic> errorList = new ArrayList<Diagnostic>();
private Runnable documentValidationChanged;
public EMFDocumentResourceMediator(final IModelResource modelResource) {
this.modelResource = modelResource;
this.document = new Document();
this.document.addDocumentListener(new IDocumentListener() {
@Override
public void documentChanged(DocumentEvent event) {
if (updateFromEMF) {
return;
}
String doc = document.get();
E4XMIResource res = new E4XMIResource();
try {
res.load(new InputSource(new StringReader(doc)), null);
modelResource.replaceRoot(res.getContents().get(0));
errorList.clear();
if (documentValidationChanged != null) {
documentValidationChanged.run();
}
} catch (IOException e) {
errorList = res.getErrors();
if (documentValidationChanged != null) {
documentValidationChanged.run();
}
}
}
@Override
public void documentAboutToBeChanged(DocumentEvent event) {
}
});
updateFromEMF();
}
public void setValidationChangedCallback(Runnable runnable) {
documentValidationChanged = runnable;
}
public List<Diagnostic> getErrorList() {
return Collections.unmodifiableList(errorList);
}
public void updateFromEMF() {
try {
updateFromEMF = true;
this.document.set(toXMI((EObject) modelResource.getRoot().get(0)));
} finally {
updateFromEMF = false;
}
}
public Document getDocument() {
return document;
}
private String toXMI(EObject root) {
E4XMIResource resource = (E4XMIResource) root.eResource();
// resource.getContents().add(EcoreUtil.copy(root));
StringWriter writer = new StringWriter();
try {
resource.save(writer, null);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return writer.toString();
}
/**
* @param object
* @return The region for the start tag of the EObject, or null if not
* found.
*/
public IRegion findStartTag(EObject object) {
if (object == null) {
return null;
}
E4XMIResource root = (E4XMIResource) ((EObject) modelResource.getRoot().get(0)).eResource();
String xmiId = root.getID(object);
FindReplaceDocumentAdapter find = new FindReplaceDocumentAdapter(document);
IRegion region;
try {
// TODO This will not work if the element has '<' or '>' in an
// attribute value
region = find.find(0, "<.*?" + xmiId + ".*?>", true, true, false, true); //$NON-NLS-1$ //$NON-NLS-2$
return region;
} catch (BadLocationException e) {
return null;
}
}
/**
* @param object
* @return The region for the start of the text, or null if not found or the
* text is empty.
*/
public IRegion findText(String text, int startOffset) {
if (E.isEmpty(text)) {
return null;
}
FindReplaceDocumentAdapter find = new FindReplaceDocumentAdapter(document);
IRegion region;
try {
region = find.find(startOffset, text, true, true, false, false);
return region;
} catch (BadLocationException e) {
return null;
}
}
}
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