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CrossReferences [..|STRING] and AutoEditing is not nice [message #1686619]

Thu, 19 March 2015 09:15

Marcus Höpfner

Messages: 53
Registered: February 2014

Member

Hi,

In the grammar there is the following cross ref:

FormulaMemberOperand returns FormulaMemberOperand:
	member=[QueryElement|STRING];

terminal STRING:
	'"' ('\\' ('b' | 't' | 'n' | 'f' | 'r' | 'u' | '"' | "'" | '\\') | !('\\' | '"'))* '"';

Enter a " and use content assist ends up in to double quotes at the end and a syntax error.
One double quote comes from auto editing and one from the cross ref string.
Like this:

User enters "
AutoEditing makes it "", cursor is in the middle
User presse CTRL+SPACE and selects an entry
Content is e.g. "Sales""

I switched off auto editing for string but I don't like the behaviour.
I thought of changing the replaceRegion in ContentAssistContext but I don't know how.

I would like to stay with auto editing but content assist should replace the second " which came from auto editing.
Is this possible?

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Re: CrossReferences [..|STRING] and AutoEditing is not nice [message #1686662 is a reply to message #1686619]

Thu, 19 March 2015 09:40

Christian Dietrich

Messages: 13876
Registered: July 2009

Senior Member

Hi, yes it is possible but is very tricky and the solution may be "not nice" anyway. the basic idea is to have a custom ICompletionProposalAcceptor.Delegate that
in its accept method examines the document and the givens ConfigurableCompletionProposal replacement offset/length and replacement string
and manipultates them the replace length-1 chars only if there is already a " after the replacing.

Unfortunately i cannot share the code since it belongs to my customer.

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: CrossReferences [..|STRING] and AutoEditing is not nice [message #1686873 is a reply to message #1686662]

Thu, 19 March 2015 11:44

Christian Dietrich

Messages: 13876
Registered: July 2009

Senior Member

Hi,

i took that as a base and created following blog post: https://christiandietrich.wordpress.com/2015/03/19/xtext-and-strings-as-cross-references/

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/it-services/methods-and-tools/xtext
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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