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.DescriptorUtils;
027    import org.jetbrains.jet.lang.resolve.ImportPath;
028    import org.jetbrains.jet.lang.resolve.name.FqName;
029    import org.jetbrains.jet.lang.resolve.name.FqNameUnsafe;
030    import org.jetbrains.jet.lang.resolve.scopes.WritableScope;
031    import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
032    
033    import java.util.List;
034    
035    import static org.jetbrains.jet.lang.resolve.DescriptorUtils.isRootNamespace;
036    
037    public class JsConfiguration implements ModuleConfiguration {
038    
039        @NotNull
040        public static final List<ImportPath> DEFAULT_IMPORT_PATHS = ImmutableList.of(
041                new ImportPath("js.*"),
042                new ImportPath("java.lang.*"),
043                new ImportPath(KotlinBuiltIns.getInstance().getBuiltInsPackageFqName(), true),
044                new ImportPath("kotlin.*"));
045    
046        /*
047         * Adds a possibility to inject some preanalyzed files to speed up tests.
048         */
049        @Nullable
050        private final BindingContext preanalyzedContext;
051    
052        JsConfiguration(@Nullable BindingContext preanalyzedContext) {
053            this.preanalyzedContext = preanalyzedContext;
054        }
055    
056        @Override
057        public void extendNamespaceScope(@NotNull NamespaceDescriptor namespaceDescriptor, @NotNull WritableScope namespaceMemberScope) {
058            DefaultModuleConfiguration.INSTANCE.extendNamespaceScope(namespaceDescriptor, namespaceMemberScope);
059    
060            // Extend root namespace with standard classes
061            if (namespaceDescriptor.getFqName().shortNameOrSpecial().equals(FqNameUnsafe.ROOT_NAME)) {
062                namespaceMemberScope.importScope(KotlinBuiltIns.getInstance().getBuiltInsScope());
063            }
064    
065            if (hasPreanalyzedContextForTests()) {
066                extendScopeWithPreAnalyzedContextForTests(namespaceDescriptor, namespaceMemberScope);
067            }
068        }
069    
070        private boolean hasPreanalyzedContextForTests() {
071            return preanalyzedContext != null;
072        }
073    
074        /*NOTE: this code is wrong. Check it if you have tests failing for frontend reasons*/
075        @SuppressWarnings("ConstantConditions")
076        private void extendScopeWithPreAnalyzedContextForTests(@NotNull NamespaceDescriptor namespaceDescriptor,
077                @NotNull WritableScope namespaceMemberScope) {
078            if (isNamespaceImportedByDefault(namespaceDescriptor) || isRootNamespace(namespaceDescriptor)) {
079                FqName descriptorName = DescriptorUtils.getFQName(namespaceDescriptor).toSafe();
080                NamespaceDescriptor alreadyAnalyzedNamespace = preanalyzedContext.get(BindingContext.FQNAME_TO_NAMESPACE_DESCRIPTOR, descriptorName);
081                namespaceMemberScope.importScope(alreadyAnalyzedNamespace.getMemberScope());
082            }
083        }
084    
085        private static boolean isNamespaceImportedByDefault(@NotNull NamespaceDescriptor namespaceDescriptor) {
086            for (ImportPath path : DEFAULT_IMPORT_PATHS) {
087                if (path.fqnPart().equals(DescriptorUtils.getFQName(namespaceDescriptor).toSafe())) {
088                    return true;
089                }
090            }
091            return false;
092        }
093    }