Examples with IContentAssistScopeProvider org.eclipse.n4js.scoping.IContentAssistScopeProvider used on opensource projects

Example 1 with IContentAssistScopeProvider

use of org.eclipse.n4js.scoping.IContentAssistScopeProvider 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 2 with IContentAssistScopeProvider

use of org.eclipse.n4js.scoping.IContentAssistScopeProvider in project n4js by eclipse.

the class ImportsAwareReferenceProposalCreator method lookupCrossReference.

/**
 * Retrieves possible reference targets from scope, including erroneous solutions (e.g., not visible targets). This
 * list is further filtered here. This is a general pattern: Do not change or modify scoping for special content
 * assist requirements, instead filter here.
 *
 * @param proposalFactory
 *            usually this will be an instance of
 *            {@link AbstractJavaBasedContentProposalProvider.DefaultProposalCreator DefaultProposalCreator}.
 * @param filter
 *            by default an instance of {@link N4JSCandidateFilter} will be provided here.
 */
@SuppressWarnings("javadoc")
public void lookupCrossReference(EObject model, EReference reference, ContentAssistContext context, ICompletionProposalAcceptor acceptor, Predicate<IEObjectDescription> filter, Function<IEObjectDescription, ICompletionProposal> proposalFactory) {
    if (model != null) {
        final IScope scope = ((IContentAssistScopeProvider) scopeProvider).getScopeForContentAssist(model, reference);
        // iterate over candidates, filter them, and create ICompletionProposals for them
        final Iterable<IEObjectDescription> candidates = scope.getAllElements();
        // don't use candidates.forEach since we want an early exit
        for (IEObjectDescription candidate : candidates) {
            if (!acceptor.canAcceptMoreProposals())
                return;
            if (filter.apply(candidate)) {
                QualifiedName qfn = candidate.getQualifiedName();
                String tmodule = null;
                if (qfn.getSegmentCount() >= 2) {
                    tmodule = qfn.getSegment(qfn.getSegmentCount() - 2);
                }
                // In case of main module, adjust the qualified name, e.g. index.Element -> react.Element
                IN4JSProject project = n4jsCore.findProject(candidate.getEObjectURI()).orNull();
                QualifiedName candidateName;
                if (project != null && tmodule != null && tmodule.equals(project.getMainModule())) {
                    candidateName = QualifiedName.create(project.getProjectId(), candidate.getQualifiedName().getLastSegment().toString());
                } else {
                    candidateName = candidate.getQualifiedName();
                }
                final ICompletionProposal proposal = getProposal(candidate, model, scope, reference, context, filter, proposalFactory);
                if (proposal instanceof ConfigurableCompletionProposal && candidate.getName().getSegmentCount() > 1) {
                    ConfigurableCompletionProposal castedProposal = (ConfigurableCompletionProposal) proposal;
                    castedProposal.setAdditionalData(FQNImporter.KEY_QUALIFIED_NAME, candidateName);
                    // Original qualified name is the qualified name before adjustment
                    castedProposal.setAdditionalData(FQNImporter.KEY_ORIGINAL_QUALIFIED_NAME, candidate.getQualifiedName());
                }
                acceptor.accept(proposal);
            }
        }
    }
}