001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.k2js.analyze;
018    
019    import com.google.common.collect.ImmutableList;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.lang.DefaultModuleConfiguration;
023    import org.jetbrains.jet.lang.ModuleConfiguration;
024    import org.jetbrains.jet.lang.descriptors.NamespaceDescriptor;
025    import org.jetbrains.jet.lang.resolve.BindingContext;
026    import org.jetbrains.jet.lang.resolve.BindingTrace;
027    import org.jetbrains.jet.lang.resolve.DescriptorUtils;
028    import org.jetbrains.jet.lang.resolve.ImportPath;
029    import org.jetbrains.jet.lang.resolve.name.FqName;
030    import org.jetbrains.jet.lang.resolve.name.FqNameUnsafe;
031    import org.jetbrains.jet.lang.resolve.scopes.WritableScope;
032    import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
033    
034    import java.util.List;
035    
036    import static org.jetbrains.jet.lang.resolve.DescriptorUtils.isRootNamespace;
037    
038    public class JsConfiguration implements ModuleConfiguration {
039    
040        @NotNull
041        public static final List<ImportPath> DEFAULT_IMPORT_PATHS = ImmutableList.of(
042                new ImportPath("js.*"),
043                new ImportPath("java.lang.*"),
044                new ImportPath(KotlinBuiltIns.getInstance().getBuiltInsPackageFqName(), true),
045                new ImportPath("kotlin.*"));
046    
047        /*
048         * Adds a possibility to inject some preanalyzed files to speed up tests.
049         */
050        @Nullable
051        private final BindingContext preanalyzedContext;
052    
053        JsConfiguration(@Nullable BindingContext preanalyzedContext) {
054            this.preanalyzedContext = preanalyzedContext;
055        }
056    
057        @Override
058        public void extendNamespaceScope(@NotNull BindingTrace trace, @NotNull NamespaceDescriptor namespaceDescriptor,
059                @NotNull WritableScope namespaceMemberScope) {
060            DefaultModuleConfiguration.INSTANCE
061                    .extendNamespaceScope(trace, namespaceDescriptor, namespaceMemberScope);
062    
063            // Extend root namespace with standard classes
064            if (namespaceDescriptor.getFqName().shortNameOrSpecial().equals(FqNameUnsafe.ROOT_NAME)) {
065                namespaceMemberScope.importScope(KotlinBuiltIns.getInstance().getBuiltInsScope());
066            }
067    
068            if (hasPreanalyzedContextForTests()) {
069                extendScopeWithPreAnalyzedContextForTests(namespaceDescriptor, namespaceMemberScope);
070            }
071        }
072    
073        private boolean hasPreanalyzedContextForTests() {
074            return preanalyzedContext != null;
075        }
076    
077        /*NOTE: this code is wrong. Check it if you have tests failing for frontend reasons*/
078        @SuppressWarnings("ConstantConditions")
079        private void extendScopeWithPreAnalyzedContextForTests(@NotNull NamespaceDescriptor namespaceDescriptor,
080                @NotNull WritableScope namespaceMemberScope) {
081            if (isNamespaceImportedByDefault(namespaceDescriptor) || isRootNamespace(namespaceDescriptor)) {
082                FqName descriptorName = DescriptorUtils.getFQName(namespaceDescriptor).toSafe();
083                NamespaceDescriptor alreadyAnalyzedNamespace = preanalyzedContext.get(BindingContext.FQNAME_TO_NAMESPACE_DESCRIPTOR, descriptorName);
084                namespaceMemberScope.importScope(alreadyAnalyzedNamespace.getMemberScope());
085            }
086        }
087    
088        private static boolean isNamespaceImportedByDefault(@NotNull NamespaceDescriptor namespaceDescriptor) {
089            for (ImportPath path : DEFAULT_IMPORT_PATHS) {
090                if (path.fqnPart().equals(DescriptorUtils.getFQName(namespaceDescriptor).toSafe())) {
091                    return true;
092                }
093            }
094            return false;
095        }
096    }