Home » Modeling » TMF (Xtext) » content assist across files(can one create template proposals across files)
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| Re: content assist across files [message #763464 is a reply to message #763457] |
Fri, 09 December 2011 20:27   |
 Mokhtar Abdu
Messages: 104
Registered: November 2011 |
Senior Member |
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Thank you! could you please tell me where and how to use the "ResourceDescriptionsProvider"?
for your question, actually, i am making dsl for prolog like language, given:
ct(head,condition(true),idcreation(skip),transformation(add(getter))).
ct(copyField(Field1,Field2,V),condition(true),idcreation(skip),transformation(replace(Field1,Field2))).
ctseq(doStuff,ct(head)).
ctseq(doStuff2,ct(copyField(F,F,value))).
those were say 4 prolog facts, in the third and fourth you note that i reused ct(head) and ct(copyField(..)) from their defining facts above. So i can't easily reference that part of prolog fact to the other fact providing at same time flexibility to user to change the arguments. SO prolog is type unsafe and you should beable in same program to change the structure of the predicates, so cross-reference FAILED  and i think to do that job in IDE runtime
Thank you,
Mokhtar
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| Re: content assist across files [message #763466 is a reply to message #763464] |
Fri, 09 December 2011 20:33 |
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Hi,
here a simple example
Model:
greetings+=Greeting*;
Greeting:
'Hello' name=ID value=ID '!';
public class MyDslProposalProvider extends AbstractMyDslProposalProvider {
@Inject
ResourceDescriptionsProvider rdp;
@Override
public void completeGreeting_Value(EObject model, Assignment assignment,
ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
IResourceDescriptions rd = rdp.getResourceDescriptions(model.eResource());
for (IEObjectDescription d : rd.getExportedObjectsByType(MyDslPackage.Literals.GREETING)) {
acceptor.accept(createCompletionProposal(d.getQualifiedName().toString(), context));
}
}
}
for perf reasons you may habe to add stuff to the user data of the ieobjectdesription using a custom DefaultResourceDescriptionStrategy
and store the information about the params there.
(use EObjectDescription.create(qualifiedName, eObject, userData) in the code.
alternatively you would have to do proxy resolving on IEObjectDescription.getEObjectOrProxy
which might be perf hell when having many/big files
~Christian
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: content assist across files [message #763474 is a reply to message #763473] |
Fri, 09 December 2011 20:47 |
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Just to be complete here a demo of the strategy
Model:
greetings+=Greeting*;
Greeting:
'Hello' name=ID number=INT value=ID '!';
public class MydslResourceDescriptionStrategy extends
DefaultResourceDescriptionStrategy {
@Override
public boolean createEObjectDescriptions(EObject eObject,
IAcceptor<IEObjectDescription> acceptor) {
if (getQualifiedNameProvider() == null)
return false;
try {
QualifiedName qualifiedName = getQualifiedNameProvider().getFullyQualifiedName(eObject);
if (qualifiedName != null) {
Map<String, String> userData = new HashMap<String, String>();
if (eObject instanceof Greeting) {
userData.put("number", ((Greeting)eObject).getNumber()+"");
}
acceptor.accept(EObjectDescription.create(qualifiedName, eObject, userData ));
}
} catch (Exception exc) {
}
return true;
}
}
public class MyDslRuntimeModule extends org.xtext.example.mydsl.AbstractMyDslRuntimeModule {
public Class<? extends IDefaultResourceDescriptionStrategy> bindIDefaultResourceDescriptionStrategy() {
return MydslResourceDescriptionStrategy.class;
}
}
public class MyDslProposalProvider extends AbstractMyDslProposalProvider {
@Inject
ResourceDescriptionsProvider rdp;
@Override
public void completeGreeting_Value(EObject model, Assignment assignment,
ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
IResourceDescriptions rd = rdp.getResourceDescriptions(model.eResource());
for (IEObjectDescription d : rd.getExportedObjectsByType(MyDslPackage.Literals.GREETING)) {
acceptor.accept(createCompletionProposal(d.getQualifiedName().toString()+d.getUserData("number"), context));
}
}
}
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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