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.translate.declaration;
018
019 import com.google.dart.compiler.backend.js.ast.*;
020 import gnu.trove.THashMap;
021 import org.jetbrains.annotations.NotNull;
022 import org.jetbrains.jet.lang.descriptors.PackageFragmentDescriptor;
023 import org.jetbrains.jet.lang.psi.JetFile;
024 import org.jetbrains.jet.lang.resolve.BindingContext;
025 import org.jetbrains.jet.lang.resolve.BindingContextUtils;
026 import org.jetbrains.jet.lang.resolve.name.FqName;
027 import org.jetbrains.k2js.translate.context.Namer;
028 import org.jetbrains.k2js.translate.context.TranslationContext;
029 import org.jetbrains.k2js.translate.general.AbstractTranslator;
030
031 import java.util.*;
032
033 import static com.google.dart.compiler.backend.js.ast.JsVars.JsVar;
034
035 public final class PackageDeclarationTranslator extends AbstractTranslator {
036 private final Iterable<JetFile> files;
037 private final Map<PackageFragmentDescriptor, PackageTranslator> packageFragmentToTranslator =
038 new LinkedHashMap<PackageFragmentDescriptor, PackageTranslator>();
039
040 public static List<JsStatement> translateFiles(@NotNull Collection<JetFile> files, @NotNull TranslationContext context) {
041 return new PackageDeclarationTranslator(files, context).translate();
042 }
043
044 private PackageDeclarationTranslator(@NotNull Iterable<JetFile> files, @NotNull TranslationContext context) {
045 super(context);
046
047 this.files = files;
048 }
049
050 @NotNull
051 private List<JsStatement> translate() {
052 // predictable order
053 Map<FqName, DefineInvocation> packageFqNameToDefineInvocation = new THashMap<FqName, DefineInvocation>();
054
055 for (JetFile file : files) {
056 PackageFragmentDescriptor packageFragment =
057 BindingContextUtils.getNotNull(context().bindingContext(), BindingContext.FILE_TO_PACKAGE_FRAGMENT, file);
058
059 PackageTranslator translator = packageFragmentToTranslator.get(packageFragment);
060 if (translator == null) {
061 createRootPackageDefineInvocationIfNeeded(packageFqNameToDefineInvocation);
062 translator = PackageTranslator.create(packageFragment, context());
063 packageFragmentToTranslator.put(packageFragment, translator);
064 }
065
066 translator.translate(file);
067 }
068
069 for (PackageTranslator translator : packageFragmentToTranslator.values()) {
070 translator.add(packageFqNameToDefineInvocation);
071 }
072
073 JsVars vars = new JsVars(true);
074 vars.addIfHasInitializer(getRootPackageDeclaration(packageFqNameToDefineInvocation.get(FqName.ROOT)));
075
076 return Collections.<JsStatement>singletonList(vars);
077 }
078
079 private void createRootPackageDefineInvocationIfNeeded(@NotNull Map<FqName, DefineInvocation> packageFqNameToDefineInvocation) {
080 if (!packageFqNameToDefineInvocation.containsKey(FqName.ROOT)) {
081 packageFqNameToDefineInvocation.put(
082 FqName.ROOT, DefineInvocation.create(FqName.ROOT, null, new JsObjectLiteral(true), context()));
083 }
084 }
085
086 private JsVar getRootPackageDeclaration(@NotNull DefineInvocation defineInvocation) {
087 JsExpression rootPackageVar = new JsInvocation(context().namer().rootPackageDefinitionMethodReference(), defineInvocation.asList());
088 return new JsVar(context().scope().declareName(Namer.getRootPackageName()), rootPackageVar);
089 }
090 }