Examples with RecursionGuard com.intellij.openapi.util.RecursionGuard used on opensource projects

Example 1 with RecursionGuard

use of com.intellij.openapi.util.RecursionGuard in project intellij-community by JetBrains.

the class DomSemContributor method registerSemProviders.

@Override
public void registerSemProviders(SemRegistrar registrar) {
    registrar.registerSemElementProvider(DomManagerImpl.FILE_DESCRIPTION_KEY, xmlFile(), xmlFile -> {
        ApplicationManager.getApplication().assertReadAccessAllowed();
        return new FileDescriptionCachedValueProvider(DomManagerImpl.getDomManager(xmlFile.getProject()), xmlFile);
    });
    registrar.registerSemElementProvider(DomManagerImpl.DOM_HANDLER_KEY, xmlTag().withParent(psiElement(XmlElementType.XML_DOCUMENT).withParent(xmlFile())), xmlTag -> {
        final FileDescriptionCachedValueProvider provider = mySemService.getSemElement(DomManagerImpl.FILE_DESCRIPTION_KEY, xmlTag.getContainingFile());
        assert provider != null;
        final DomFileElementImpl element = provider.getFileElement();
        if (element != null) {
            final DomRootInvocationHandler handler = element.getRootHandler();
            if (handler.getXmlTag() == xmlTag) {
                return handler;
            }
        }
        return null;
    });
    final ElementPattern<XmlTag> nonRootTag = xmlTag().withParent(or(xmlTag(), xmlEntityRef().withParent(xmlTag())));
    registrar.registerSemElementProvider(DomManagerImpl.DOM_INDEXED_HANDLER_KEY, nonRootTag, tag -> {
        final XmlTag parentTag = PhysicalDomParentStrategy.getParentTag(tag);
        assert parentTag != null;
        DomInvocationHandler parent = getParentDom(parentTag);
        if (parent == null)
            return null;
        final String localName = tag.getLocalName();
        final String namespace = tag.getNamespace();
        final DomFixedChildDescription description = findChildrenDescription(parent.getGenericInfo().getFixedChildrenDescriptions(), tag, parent);
        if (description != null) {
            final int totalCount = description.getCount();
            int index = 0;
            PsiElement current = tag;
            while (true) {
                current = current.getPrevSibling();
                if (current == null) {
                    break;
                }
                if (current instanceof XmlTag) {
                    final XmlTag xmlTag = (XmlTag) current;
                    if (localName.equals(xmlTag.getLocalName()) && namespace.equals(xmlTag.getNamespace())) {
                        index++;
                        if (index >= totalCount) {
                            return null;
                        }
                    }
                }
            }
            final DomManagerImpl myDomManager = parent.getManager();
            return new IndexedElementInvocationHandler(parent.createEvaluatedXmlName(description.getXmlName()), (FixedChildDescriptionImpl) description, index, new PhysicalDomParentStrategy(tag, myDomManager), myDomManager, null);
        }
        return null;
    });
    registrar.registerSemElementProvider(DomManagerImpl.DOM_COLLECTION_HANDLER_KEY, nonRootTag, tag -> {
        final XmlTag parentTag = PhysicalDomParentStrategy.getParentTag(tag);
        assert parentTag != null;
        DomInvocationHandler parent = getParentDom(parentTag);
        if (parent == null)
            return null;
        final DomCollectionChildDescription description = findChildrenDescription(parent.getGenericInfo().getCollectionChildrenDescriptions(), tag, parent);
        if (description != null) {
            DomStub parentStub = parent.getStub();
            if (parentStub != null) {
                int index = ArrayUtil.indexOf(parentTag.findSubTags(tag.getName(), tag.getNamespace()), tag);
                ElementStub stub = parentStub.getElementStub(tag.getLocalName(), index);
                if (stub != null) {
                    XmlName name = description.getXmlName();
                    EvaluatedXmlNameImpl evaluatedXmlName = EvaluatedXmlNameImpl.createEvaluatedXmlName(name, name.getNamespaceKey(), true);
                    return new CollectionElementInvocationHandler(evaluatedXmlName, (AbstractDomChildDescriptionImpl) description, parent.getManager(), stub);
                }
            }
            return new CollectionElementInvocationHandler(description.getType(), tag, (AbstractCollectionChildDescription) description, parent, null);
        }
        return null;
    });
    registrar.registerSemElementProvider(DomManagerImpl.DOM_CUSTOM_HANDLER_KEY, nonRootTag, new NullableFunction<XmlTag, CollectionElementInvocationHandler>() {

        private final RecursionGuard myGuard = RecursionManager.createGuard("customDomParent");

        @Override
        public CollectionElementInvocationHandler fun(XmlTag tag) {
            if (StringUtil.isEmpty(tag.getName()))
                return null;
            final XmlTag parentTag = PhysicalDomParentStrategy.getParentTag(tag);
            assert parentTag != null;
            DomInvocationHandler parent = myGuard.doPreventingRecursion(tag, true, (NullableComputable<DomInvocationHandler>) () -> getParentDom(parentTag));
            if (parent == null)
                return null;
            DomGenericInfoEx info = parent.getGenericInfo();
            final List<? extends CustomDomChildrenDescription> customs = info.getCustomNameChildrenDescription();
            if (customs.isEmpty())
                return null;
            if (mySemService.getSemElement(DomManagerImpl.DOM_INDEXED_HANDLER_KEY, tag) == null && mySemService.getSemElement(DomManagerImpl.DOM_COLLECTION_HANDLER_KEY, tag) == null) {
                String localName = tag.getLocalName();
                XmlFile file = parent.getFile();
                for (final DomFixedChildDescription description : info.getFixedChildrenDescriptions()) {
                    XmlName xmlName = description.getXmlName();
                    if (localName.equals(xmlName.getLocalName()) && DomImplUtil.isNameSuitable(xmlName, tag, parent, file)) {
                        return null;
                    }
                }
                for (CustomDomChildrenDescription description : customs) {
                    if (description.getTagNameDescriptor() != null) {
                        AbstractCollectionChildDescription desc = (AbstractCollectionChildDescription) description;
                        Type type = description.getType();
                        return new CollectionElementInvocationHandler(type, tag, desc, parent, null);
                    }
                }
            }
            return null;
        }
    });
    registrar.registerSemElementProvider(DomManagerImpl.DOM_ATTRIBUTE_HANDLER_KEY, xmlAttribute(), attribute -> {
        final XmlTag tag = PhysicalDomParentStrategy.getParentTag(attribute);
        final DomInvocationHandler handler = tag == null ? null : getParentDom(tag);
        if (handler == null)
            return null;
        final String localName = attribute.getLocalName();
        final Ref<AttributeChildInvocationHandler> result = Ref.create(null);
        handler.getGenericInfo().processAttributeChildrenDescriptions(description -> {
            if (description.getXmlName().getLocalName().equals(localName)) {
                final EvaluatedXmlName evaluatedXmlName = handler.createEvaluatedXmlName(description.getXmlName());
                final String ns = evaluatedXmlName.getNamespace(tag, handler.getFile());
                if (ns.equals(tag.getNamespace()) && localName.equals(attribute.getName()) || ns.equals(attribute.getNamespace())) {
                    final DomManagerImpl myDomManager = handler.getManager();
                    final AttributeChildInvocationHandler attributeHandler = new AttributeChildInvocationHandler(evaluatedXmlName, description, myDomManager, new PhysicalDomParentStrategy(attribute, myDomManager), null);
                    result.set(attributeHandler);
                    return false;
                }
            }
            return true;
        });
        return result.get();
    });
}