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Xtext Hover Documentation [message #1822037]

Wed, 26 February 2020 09:31

Loredana Hozan

Messages: 20
Registered: January 2019

Junior Member

Hello, i have the following grammar:

	('data-dictionary' '{'
	attributes+=(Attribute)*
	'}')?
	('entity-catalog' '{'
	entities+=Entity*
	'}')?
	'}';
Attribute:
	AttributeSimpleType | AttributeEntityType 
Entity:
	(documentation=ML_DOC_COMMENT)?  
        name=ID funcName=STRING '{'
	features+=(Feature)*
'}';
Feature:
	(documentation=ML_DOC_COMMENT)? 
	(type=FeatureAttributeType | type=FeatureEntityType)
FeatureAttributeType:
	(type=[AttributeSimpleType|ID]|type=[AttributeSimpleType|GENERAL_FQN])
FeatureEntityType:
	'entity' (attribute=[AttributeEntityType|ID]|attribute=[AttributeEntityType|GENERAL_FQN]);

I have implemented the IEObjectDocumentationProvider and DefaultEObjectHoverProvider, but when i hover over a feature instead of giving me the doc. of the feature it gives me the doc of the attribute which is contained in the data-dictionary. The object that is passed to the getDocumentation method is of type Attribute. I have debugged and noticed in the EObjectAtOffsetHelper inside the resolveCrossReferencedElement method, the type of the object passed is Feature, but there is a check for the object's representation in the model instance. Since the selected Feature is present as an Attribute the returned object is the Attribute. Is there a way to get the doc of the feature instead of the attribute without having to override that method and get rid of the check?

Attachment: FeatureDocumentation.png
(Size: 37.95KB, Downloaded 9 times)

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Re: Xtext Hover Documentation [message #1822041 is a reply to message #1822037]

Wed, 26 February 2020 09:36

Christian Dietrich

Messages: 13642
Registered: July 2009

Senior Member

Hi,

which check are you referring to?

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Re: Xtext Hover Documentation [message #1822042 is a reply to message #1822041]

Wed, 26 February 2020 09:40

Loredana Hozan

Messages: 20
Registered: January 2019

Junior Member

Hello, from the class EObjectAtOffsetHelper line 139:

 
if (!crossReference.isMany()) {
				return (EObject) referenceOwner.eGet(crossReference);

before this check the referenceOwner is of type Feature which is the desired type.

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Re: Xtext Hover Documentation [message #1822044 is a reply to message #1822042]

Wed, 26 February 2020 09:43

Christian Dietrich

Messages: 13642
Registered: July 2009

Senior Member

yes. its intended that we show the documentation of the thing that is referenced at the place you hover. if you dont want this
and show the contained eObjects documentation instead. then you need to customize

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Re: Xtext Hover Documentation [message #1822045 is a reply to message #1822042]

Wed, 26 February 2020 09:48

Loredana Hozan

Messages: 20
Registered: January 2019

Junior Member

Is there a specific class which i could costumize?

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Re: Xtext Hover Documentation [message #1822049 is a reply to message #1822045]

Wed, 26 February 2020 10:19

Christian Dietrich

Messages: 13642
Registered: July 2009

Senior Member

guess the one that calls EObjectAtOffsetHelper

Need professional support for Xtext, Xpand, EMF?
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Re: Xtext Hover Documentation [message #1822051 is a reply to message #1822049]

Wed, 26 February 2020 10:25

Loredana Hozan

Messages: 20
Registered: January 2019

Junior Member

I started to make the changes , but it got tideous, and i was hoping to avoid that.
Thank you for your replies :)

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