001    /*
002     * Copyright 2010-2015 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.kotlin.js.translate.expression;
018    
019    import com.google.dart.compiler.backend.js.ast.JsExpression;
020    import com.google.dart.compiler.backend.js.ast.JsName;
021    import com.google.dart.compiler.backend.js.ast.JsNameRef;
022    import com.google.dart.compiler.backend.js.ast.JsVars;
023    import org.jetbrains.annotations.NotNull;
024    import org.jetbrains.annotations.Nullable;
025    import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
026    import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor;
027    import org.jetbrains.kotlin.descriptors.VariableDescriptor;
028    import org.jetbrains.kotlin.js.translate.callTranslator.CallTranslator;
029    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
030    import org.jetbrains.kotlin.js.translate.general.AbstractTranslator;
031    import org.jetbrains.kotlin.js.translate.reference.CallExpressionTranslator;
032    import org.jetbrains.kotlin.psi.JetMultiDeclaration;
033    import org.jetbrains.kotlin.psi.JetMultiDeclarationEntry;
034    import org.jetbrains.kotlin.resolve.BindingContext;
035    import org.jetbrains.kotlin.resolve.BindingContextUtils;
036    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
037    
038    import java.util.ArrayList;
039    import java.util.List;
040    
041    import static org.jetbrains.kotlin.js.translate.utils.InlineUtils.setInlineCallMetadata;
042    
043    public class MultiDeclarationTranslator extends AbstractTranslator {
044    
045        // if multiObjectName was init, initializer must be null
046        @NotNull
047        public static JsVars translate(
048                @NotNull JetMultiDeclaration multiDeclaration,
049                @NotNull JsName multiObjectName,
050                @Nullable JsExpression initializer,
051                @NotNull TranslationContext context
052        ) {
053            return new MultiDeclarationTranslator(multiDeclaration, multiObjectName, initializer, context).translate();
054        }
055    
056        @NotNull
057        private final JetMultiDeclaration multiDeclaration;
058        @NotNull
059        private final JsName multiObjectName;
060        @Nullable
061        private final JsExpression initializer;
062    
063        private MultiDeclarationTranslator(
064                @NotNull JetMultiDeclaration multiDeclaration,
065                @NotNull JsName multiObjectName,
066                @Nullable JsExpression initializer,
067                @NotNull TranslationContext context
068        ) {
069            super(context);
070            this.multiDeclaration = multiDeclaration;
071            this.multiObjectName = multiObjectName;
072            this.initializer = initializer;
073        }
074    
075        private JsVars translate() {
076            List<JsVars.JsVar> jsVars = new ArrayList<JsVars.JsVar>();
077            if (initializer != null) {
078                jsVars.add(new JsVars.JsVar(multiObjectName, initializer));
079            }
080    
081            JsNameRef multiObjNameRef = multiObjectName.makeRef();
082            for (JetMultiDeclarationEntry entry : multiDeclaration.getEntries()) {
083                ResolvedCall<FunctionDescriptor> entryInitCall =  context().bindingContext().get(BindingContext.COMPONENT_RESOLVED_CALL, entry);
084                assert entryInitCall != null : "Entry init call must be not null";
085                JsExpression entryInitializer = CallTranslator.translate(context(), entryInitCall, multiObjNameRef);
086                FunctionDescriptor candidateDescriptor = entryInitCall.getCandidateDescriptor();
087                if (CallExpressionTranslator.shouldBeInlined(candidateDescriptor)) {
088                    setInlineCallMetadata(entryInitializer, entry, entryInitCall, context());
089                }
090                VariableDescriptor descriptor = BindingContextUtils.getNotNull( context().bindingContext(), BindingContext.VARIABLE, entry);
091                JsName name =  context().getNameForDescriptor(descriptor);
092                jsVars.add(new JsVars.JsVar(name, entryInitializer));
093            }
094            return new JsVars(jsVars, true);
095        }
096    }