[xtext-dev] completion proposal: possible to remove a proposal

["Warmer, Jos" <Jos.Warmer@xxxxxxxxx>]

Hi,

 

In Xtext/oAW we have used the completion Proposal provider extensively.

As we have an optional  “description” element in front of each real modelelement  we always get a “description” in the proposal list.\

In oAW/Xtext we used the following operation to generically filter out the description proposals.

 

/** Filter out all proiposals that end with Description.

 *  This eliminates the descritions from all proposals.

 *  Also put a space at the end of all proposals

 */

List[Proposal] sortProposals(List[Proposal] proposalsToSort):

    proposalsToSort.reject(p | p.label.endsWith("Description"));

 

The sortProposals is implicitly called by each proposal provider, meaning that we only have to implement this operation once.

It is always automatically caller.

 

In TMF/xtext a proposal is added to the “acceptor”:

 

      acceptor.accept(completionProposal);

 

At the end we would like to remove something from the acceptor, e.g. like this:

 

      acceptor.remove(completionProposal);

 

This allows us to keep the generated proposals as they are and only put the “remove” in the overridden operation.

However, The acceptor does not have a “remove” operation.

 

I have two questions:

1.        is it possible to add this “remove” operation to the acceptor?

2.       Is there something like the sortProposals() which is always called for all proposals lists in TMF/xText ? 

This would allow us to implement this once, instead as for each rule.

 

 

Regards,

Jos Warmer
Partner

Ordina Application Outsourcing en Projecten B.V.
Centre of Excellence

 

 

 

 

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