Description Moritz Eysholdt 2010-06-25 09:15:28 EDT

For people that implement a language for Xtext's index that is not based on a Xtext grammar, IResourceUIServiceProvider requires them to supply a URIOpener.

It would be good to have a generic default implementation for non-Xtext editors. For example, the one below.

GlobalURIEditorOpener is not suitable since there are cases where it delegates to the global URI opener and thereby creates a stack overflow.

/*
 * partly copied from org.eclipse.xtext.ui.editor.GlobalURIEditorOpener
 */
public class DefaultURIEditorOperner implements IURIEditorOpener {

	private static final Logger logger = Logger.getLogger(DefaultURIEditorOperner.class);

	public IEditorPart open(URI uri, boolean select) {
		return openDefaultEditor(uri, null, -1, select);
	}

	public IEditorPart open(URI referenceOwnerURI, EReference reference, int indexInList, boolean select) {
		return openDefaultEditor(referenceOwnerURI, reference, indexInList, select);
	}

	protected IEditorPart openDefaultEditor(URI uri, EReference crossReference, int indexInList, boolean select) {
		Iterator<IStorage> storages = Access.getIStorage2UriMapper().get().getStorages(uri.trimFragment()).iterator();
		if (storages != null && storages.hasNext()) {
			try {
				IStorage storage = storages.next();
				IEditorPart editor = null;
				if (storage instanceof IFile) {
					editor = openDefaultEditor((IFile) storage);
				} else {
					editor = openDefaultEditor(storage, uri);
				}
				return editor;
			} catch (WrappedException e) {
				logger.error("Error while opening editor part for EMF URI '" + uri + "'", e.getCause());
			} catch (PartInitException partInitException) {
				logger.error("Error while opening editor part for EMF URI '" + uri + "'", partInitException);
			}
		}
		return null;
	}

	protected IEditorPart openDefaultEditor(IFile file) throws PartInitException {
		IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
		return IDE.openEditor(page, file);
	}

	protected IEditorPart openDefaultEditor(IStorage storage, URI uri) throws PartInitException {
		XtextReadonlyEditorInput editorInput = new XtextReadonlyEditorInput(storage);
		IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
		return IDE.openEditor(page, editorInput, PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(uri.lastSegment()).getId());
	}

}