Examples with IScope org.eclipse.xtext.scoping.IScope used on opensource projects

Example 51 with IScope

use of org.eclipse.xtext.scoping.IScope in project n4js by eclipse.

the class UnionMemberScope method getCheckedDescription.

@Override
protected IEObjectDescription getCheckedDescription(String name, TMember member) {
    IEObjectDescription description = EObjectDescription.create(member.getName(), member);
    QualifiedName qn = QualifiedName.create(name);
    for (IScope currSubScope : subScopes) {
        IEObjectDescription subDescription = currSubScope.getSingleElement(qn);
        boolean descrWithError = subDescription == null || subDescription instanceof IEObjectDescriptionWithError;
        if (descrWithError) {
            return createComposedMemberDescriptionWithErrors(description);
        }
    }
    return description;
}

Example 52 with IScope

use of org.eclipse.xtext.scoping.IScope in project n4js by eclipse.

the class ScopeXpectMethod method scope.

@Override
@Xpect
@ParameterParser(syntax = "('at' arg1=OFFSET)?")
public // 
void scope(// 
@CommaSeparatedValuesExpectation ICommaSeparatedValuesExpectation expectation, // 
ICrossEReferenceAndEObject arg1) {
    EObject eobj = arg1.getEObject();
    IScope scope = scopeProvider.getScope(eobj, arg1.getCrossEReference());
    URI uri = eobj == null ? null : eobj.eResource() == null ? null : eobj.eResource().getURI();
    expectation.assertEquals(new ScopeAllElements(scope), new IsInScopeWithOptionalPositionPredicate(converter, uri, false, scope));
}

Example 53 with IScope

use of org.eclipse.xtext.scoping.IScope in project n4js by eclipse.

the class JSDocCompletionProposalComputer method exec.

@SuppressWarnings("unchecked")
@Override
public ICompletionProposal[] exec(XtextResource xtextResource) throws Exception {
    ContentAssistContext[] contexts = processor.getContextFactory().create(viewer, offset, xtextResource);
    if (contexts.length > 0) {
        ArrayList<ICompletionProposal> proposals = new ArrayList<>();
        ContentAssistContext contentAssistContext = contexts[contexts.length - 1];
        INode currentNode = contentAssistContext.getCurrentNode();
        String content = currentNode.getText();
        int offsetInNode = contentAssistContext.getOffset() - currentNode.getOffset() - contentAssistContext.getPrefix().length();
        // String textInFront = content.substring(0, offsetInNode);
        // System.out.println(textInFront);
        N4JSDocletParser docletParser = processor.getDocletParser();
        Doclet doclet = docletParser.parse(content);
        Optional<String> lineTagPrefix = getLineTagTitlePrefix(content, offsetInNode);
        if (lineTagPrefix.isPresent()) {
            createLineTagProposal(lineTagPrefix.get(), docletParser, proposals);
        }
        Tag tag = JSDocletUtils.getTagAtOffset(doclet, offsetInNode);
        if (tag != null) {
            ITagDefinition tagDef = tag.getTagDefinition();
            JSDocCharScanner scanner = new JSDocCharScanner(content);
            ScannerState state = scanner.saveState();
            scanner.setNextOffset(offsetInNode);
            JSDocCompletionHint completionHint = tagDef.completionHint(scanner);
            scanner.restoreState(state);
            if (completionHint.kind != NOCOMPLETION) {
                int replacementOffset = offset - completionHint.prefix.length();
                if (completionHint.isTypeModelRef()) {
                    // get reference as far as it can be parsed:
                    FullMemberReference ref = completionHint.nodeAsFullMemberReference();
                    IContentAssistScopeProvider scopeProvider = (IContentAssistScopeProvider) processor.getScopeProvider();
                    IScope moduleSpecScope = scopeProvider.getScopeForContentAssist(// context for finding modules
                    xtextResource.getContents().get(0), N4JSPackage.Literals.IMPORT_DECLARATION__MODULE);
                    // complete module or type
                    if (!completionHint.isModuleNameCompleted()) {
                        for (IEObjectDescription moduleDescr : moduleSpecScope.getAllElements()) {
                            String moduleSpec = moduleDescr.getName().toString("/");
                            String moduleSimpleName = moduleDescr.getName().getLastSegment();
                            if (!moduleSpec.startsWith("#")) {
                                if (moduleSpec.startsWith(completionHint.prefix) || moduleSimpleName.startsWith(completionHint.prefix)) {
                                    if (moduleSpec.length() == completionHint.prefix.length()) {
                                        int replacementLength = 0;
                                        int cursorPosition = 1;
                                        ICompletionProposal proposal = new CompletionProposal(".", replacementOffset + completionHint.prefix.length(), replacementLength, cursorPosition);
                                        proposals.add(proposal);
                                    } else {
                                        int replacementLength = completionHint.prefix.length();
                                        int cursorPosition = moduleSpec.length();
                                        ICompletionProposal proposal = new CompletionProposal(moduleSpec, replacementOffset, replacementLength, cursorPosition);
                                        proposals.add(proposal);
                                    }
                                }
                            }
                        }
                    } else {
                        QualifiedName moduleQN = QualifiedName.create(ref.getModuleName().split("/"));
                        IEObjectDescription descr = moduleSpecScope.getSingleElement(moduleQN);
                        if (descr != null && descr.getEObjectOrProxy() instanceof TModule) {
                            TModule module = (TModule) descr.getEObjectOrProxy();
                            if (module.eIsProxy())
                                module = (TModule) EcoreUtil.resolve(module, xtextResource);
                            if (!completionHint.isTypeNameCompleted(false) && completionHint.kind != MODULESPEC) {
                                String typePrefix = ref.getTypeName();
                                for (Type t : module.getTopLevelTypes()) {
                                    String typeName = t.getName();
                                    if (typeName.startsWith(typePrefix)) {
                                        String completion = module.getModuleSpecifier() + "." + typeName;
                                        int replacementLength = completionHint.prefix.length();
                                        int cursorPosition = completion.length();
                                        ICompletionProposal proposal = new CompletionProposal(completion, replacementOffset, replacementLength, cursorPosition);
                                        proposals.add(proposal);
                                    }
                                }
                            } else {
                                // completionHint.kind == MEMBER
                                Optional<Type> optType = module.getTopLevelTypes().stream().filter(t -> t.getName().equals(ref.getTypeName())).findAny();
                                if (optType.isPresent()) {
                                    Type t = optType.get();
                                    if (t instanceof ContainerType) {
                                        String memberPrefix = ref.getMemberName();
                                        for (TMember m : ((ContainerType<? extends TMember>) t).getOwnedMembers()) {
                                            String memberName = m.getName();
                                            if (memberName.startsWith(memberPrefix)) {
                                                String completion = LineTagWithFullElementReference.createReferenceFromType(m).toString();
                                                int replacementLength = completionHint.prefix.length();
                                                int cursorPosition = completion.length();
                                                ICompletionProposal proposal = new CompletionProposal(completion, replacementOffset, replacementLength, cursorPosition);
                                                proposals.add(proposal);
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        ICompletionProposal[] result = new ICompletionProposal[proposals.size()];
        proposals.toArray(result);
        return result;
    }
    return null;
}

Example 54 with IScope

use of org.eclipse.xtext.scoping.IScope in project n4js by eclipse.

the class ComposedMemberScope method getAllLocalElements.

/**
 * Returns all elements of union. No erroneous descriptions (instances of IEObjectDescriptionWithError) will be
 * considered here, as we assume this method to be called from content assist and we do not want to show wrong
 * elements. These descriptions will be returned by {@link #getSingleElement(QualifiedName)} though to show errors
 * in case of explicit references to these members.
 */
@Override
protected Iterable<IEObjectDescription> getAllLocalElements() {
    // collect all names from subScopes
    final Set<String> names = new HashSet<>();
    for (IScope currSubScope : subScopes) {
        try {
            for (IEObjectDescription currDesc : currSubScope.getAllElements()) {
                // omit erroneous bindings (they will be provided in getSingleLocalElement... though)
                if (!(currDesc instanceof IEObjectDescriptionWithError)) {
                    String name = currDesc.getName().getLastSegment();
                    names.add(name);
                }
            }
        } catch (UnsupportedOperationException e) {
        // according to API doc of IScope#getAllElements(), scopes are free to throw an
        // UnsupportedOperationException --> therefore we catch and ignore this here
        }
    }
    List<IEObjectDescription> descriptions = new ArrayList<>(names.size());
    for (String name : names) {
        IEObjectDescription description = getSingleLocalElementByName(QualifiedName.create(name));
        if (description != null && !(description instanceof IEObjectDescriptionWithError)) {
            descriptions.add(description);
        }
    }
    return descriptions;
}

Example 55 with IScope

use of org.eclipse.xtext.scoping.IScope in project n4js by eclipse.

the class ErrorAwareLinkingService method getLinkedObjects.

@Override
public List<EObject> getLinkedObjects(EObject context, EReference ref, INode node) throws IllegalNodeException {
    final EClass requiredType = ref.getEReferenceType();
    if (requiredType == null)
        return Collections.<EObject>emptyList();
    final String crossRefString = getCrossRefNodeAsString(context, ref, node);
    if (crossRefString != null && !crossRefString.equals("")) {
        final IScope scope = getScope(context, ref);
        QualifiedName qualifiedLinkName = qualifiedNameConverter.toQualifiedName(crossRefString);
        IEObjectDescription eObjectDescription = scope.getSingleElement(qualifiedLinkName);
        if (IEObjectDescriptionWithError.isErrorDescription(eObjectDescription) && context.eResource() != null && !n4jsCore.isNoValidate(context.eResource().getURI())) {
            addError(context, node, IEObjectDescriptionWithError.getDescriptionWithError(eObjectDescription));
        } else if (eObjectDescription instanceof UnresolvableObjectDescription) {
            return Collections.<EObject>singletonList((EObject) context.eGet(ref, false));
        }
        if (eObjectDescription != null) {
            EObject candidate = eObjectDescription.getEObjectOrProxy();
            if (!candidate.eIsProxy() && candidate.eResource() == null) {
                // Error is necessary since EMF catches all exceptions in EcoreUtil#resolve
                throw new AssertionError("Found an instance without resource and without URI");
            }
            // if supported, mark object description as used
            if (eObjectDescription instanceof IUsageAwareEObjectDescription) {
                ((IUsageAwareEObjectDescription) eObjectDescription).markAsUsed();
            }
            return Collections.singletonList(candidate);
        }
    }
    return Collections.emptyList();
}