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Autocomplete import statements [message #642700]

Thu, 02 December 2010 12:30

Mark Christiaens

Messages: 63
Registered: October 2010

Member

I am using an ImportedNamespaceAwareLocalScopeProvider. It imports namespace based on the presence of importedNamespace attributes in the grammar. It seems to me that an importedNamespace attribute must refer to an object that is a String. Does that mean that there is no way to have autocomplete support for that string?

So what I'd like to do is something like this:

Import: 'import' importedNamespace=QualifiedNameWithWildCard;

QualifiedNameWithWildCard: QualifiedName '.*'?;

QualifiedName:	([NameSpaceSegment|ID] '.')* [DeclaredObject|ID];

So I want Xtext to know that NameSpaceSegment and DeclaredObject are references that together constitue a complete import.

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Re: Autocomplete import statements [message #642704 is a reply to message #642700]

Thu, 02 December 2010 12:47

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

Hi Mark,

modeling the qualified name for imports as a cross reference by default
would introduce some limitations. That's why we decided to model it as a
plain string.
To et content assist for imports, I'd try to customize the appropriate
method for the importedNamespace directly. The implemenation could use
the container manager to obtain any visible container for the current
resource and iterate their contents.
It would be even nicer to add imports automatically if an item with a
fully qualified name is choosen from the proposal list for any given
cross ref. Therefore you could implement the
ConfigurableCompletionProposal.IReplacementTextApplier.
See XtextProposalProvider.createOverrideProposal(AbstractRule, Grammar,
ContentAssistContext, ICompletionProposalAcceptor) for an example in the
Xtext 2.0 stream.

Regards,
Sebastian
--
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Am 02.12.10 13:30, schrieb Mark Christiaens:
> I am using an ImportedNamespaceAwareLocalScopeProvider. It imports
> namespace based on the presence of importedNamespace attributes in the
> grammar. It seems to me that an importedNamespace attribute must refer
> to an object that is a String. Does that mean that there is no way to
> have autocomplete support for that string?
> So what I'd like to do is something like this:
>
>
> Import: 'import' importedNamespace=QualifiedNameWithWildCard;
>
> QualifiedNameWithWildCard: QualifiedName '.*'?;
>
> QualifiedName: ([NameSpaceSegment|ID] '.')* [DeclaredObject|ID];
>
> So I want Xtext to know that NameSpaceSegment and DeclaredObject are
> references that together constitue a complete import.

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