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Home » Modeling » TMF (Xtext) » How to implement hyperlinking for URI of importURI grammar element?(For references Xtext provides hyperlinking support out-of-the box. How can similar hyperlinking implemented for the URI in a importURI grammar element?)

How to implement hyperlinking for URI of importURI grammar element? [message #1226453]

Wed, 01 January 2014 16:04

Eclipse User

I'm using the importURI approach for referencing elements in other model files in a Xtext grammar:

DslImport :
	'import' importURI=STRING;

For references to elements in the imported model Xtexts hyperlinking support is working great.
Now I'm wondering how to implement hyperlinking for the importURI to open the corresponding model file.
Any pointers?

/Torsten

Re: How to implement hyperlinking for URI of importURI grammar element? [message #1226465 is a reply to message #1226453]

Wed, 01 January 2014 16:49

Eclipse User

Hi,

i think you have todo this yourself
you may use this (quick and dirty) code as starting point. (maybe googling reveals better code

public class MyDslHyperlinkHelper extends HyperlinkHelper {
	
	@Inject
	MyDslGrammarAccess ga;
	
	@Inject
	ImportUriResolver r;
	
	@Inject
	private Provider<XtextHyperlink> hyperlinkProvider;
	
	@Inject
	ImportUriGlobalScopeProvider gsp;
	
	@Override
	public void createHyperlinksByOffset(XtextResource resource, int offset,
			IHyperlinkAcceptor acceptor) {
		INode node = NodeModelUtils.findLeafNodeAtOffset(resource.getParseResult().getRootNode(), offset);
		if (node != null && node.getGrammarElement() instanceof RuleCall && node.getSemanticElement() instanceof Import) {
			if (ga.getSTRINGRule().equals(((RuleCall)node.getGrammarElement()).getRule())) {
				Import i = (Import) node.getSemanticElement();
				String uriString = i.getImportURI();
				URI uri = URI.createURI(uriString);
				final URIConverter uriConverter = resource.getResourceSet().getURIConverter();
				final URI normalized = uri.isPlatformResource() ? uri : uriConverter.normalize(uri);
				final URI targetURI = gsp.getResourceDescriptions(resource, Lists.newArrayList(normalized)).getResourceDescription(normalized).getURI();
				XtextHyperlink result = hyperlinkProvider.get();
				result.setURI(targetURI);
				Region region = new Region(node.getOffset(), node.getLength());
				result.setHyperlinkRegion(region);
				result.setHyperlinkText(uriString);
				acceptor.accept(result);
			}
		}
		super.createHyperlinksByOffset(resource, offset, acceptor);
	}

}