Examples with SignatureInformation org.graalvm.tools.lsp.server.types.SignatureInformation used on opensource projects

Example 1 with SignatureInformation

use of org.graalvm.tools.lsp.server.types.SignatureInformation in project graal by oracle.

the class SignatureHelpRequestHandler method signatureHelpWithEnteredContext.

public SignatureHelp signatureHelpWithEnteredContext(URI uri, int line, int originalCharacter) throws DiagnosticsNotification {
    TextDocumentSurrogate surrogate = surrogateMap.get(uri);
    if (isSignatureHelpTriggerCharOfLanguage(surrogate, line, originalCharacter)) {
        InstrumentableNode nodeAtCaret = findNodeAtCaret(surrogate, line, originalCharacter, StandardTags.CallTag.class);
        if (nodeAtCaret != null) {
            SourceSection signatureSection = ((Node) nodeAtCaret).getSourceSection();
            SourceSectionFilter.Builder builder = SourceCodeEvaluator.createSourceSectionFilter(surrogate.getUri(), signatureSection);
            SourceSectionFilter eventFilter = builder.tagIs(StandardTags.CallTag.class).build();
            SourceSectionFilter inputFilter = SourceSectionFilter.ANY;
            EvaluationResult evalResult = sourceCodeEvaluator.runToSectionAndEval(surrogate, signatureSection, eventFilter, inputFilter);
            // TODO: Are we asking for the signature on the correct object?
            if (evalResult.isEvaluationDone() && !evalResult.isError()) {
                Object result = evalResult.getResult();
                if (INTEROP.accepts(result) && INTEROP.isExecutable(result)) {
                    try {
                        Object signature = LSP_INTEROP.getSignature(result);
                        LanguageInfo langInfo = surrogate.getLanguageInfo();
                        String label = INTEROP.asString(INTEROP.toDisplayString(env.getLanguageView(langInfo, signature)));
                        SignatureInformation info = SignatureInformation.create(label, null);
                        if (signature instanceof TruffleObject) {
                            if (INTEROP.isMemberReadable(signature, PROP_DOCUMENTATION)) {
                                Object doc = INTEROP.readMember(signature, PROP_DOCUMENTATION);
                                Object documentation = completionHandler.getDocumentation(doc, langInfo);
                                if (documentation != null) {
                                    info.setDocumentation(documentation);
                                }
                            }
                            if (INTEROP.isMemberReadable(signature, PROP_PARAMETERS)) {
                                Object paramsObject = INTEROP.readMember(signature, PROP_PARAMETERS);
                                if (paramsObject instanceof TruffleObject && INTEROP.hasArrayElements(paramsObject)) {
                                    long size = INTEROP.getArraySize(paramsObject);
                                    List<ParameterInformation> paramInfos = new ArrayList<>((int) size);
                                    for (long i = 0; i < size; i++) {
                                        if (!INTEROP.isArrayElementReadable(paramsObject, i)) {
                                            continue;
                                        }
                                        Object param = INTEROP.readArrayElement(paramsObject, i);
                                        if (param instanceof TruffleObject) {
                                            ParameterInformation paramInfo = getParameterInformation(param, label, langInfo);
                                            if (paramInfo != null) {
                                                paramInfos.add(paramInfo);
                                            }
                                        }
                                    }
                                    info.setParameters(paramInfos);
                                }
                            }
                        }
                        Object nodeObject = nodeAtCaret.getNodeObject();
                        Integer numberOfArguments = InteropUtils.getNumberOfArguments(nodeObject, logger);
                        // parameter
                        return SignatureHelp.create(Arrays.asList(info), 0, numberOfArguments != null ? numberOfArguments - 1 : 0);
                    } catch (UnsupportedMessageException e) {
                        logger.log(Level.FINEST, "GET_SIGNATURE message not supported for TruffleObject: {0}", result);
                    } catch (InteropException e) {
                        e.printStackTrace(err);
                    }
                }
            }
        }
    }
    return SignatureHelp.create(Collections.emptyList(), null, null);
}