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.operation;
018    
019    import com.google.dart.compiler.backend.js.ast.JsBlock;
020    import com.google.dart.compiler.backend.js.ast.JsExpression;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
023    import org.jetbrains.kotlin.js.translate.callTranslator.CallTranslator;
024    import org.jetbrains.kotlin.js.translate.context.TranslationContext;
025    import org.jetbrains.kotlin.js.translate.reference.AccessTranslator;
026    import org.jetbrains.kotlin.psi.KtBinaryExpression;
027    import org.jetbrains.kotlin.resolve.calls.callUtil.CallUtilKt;
028    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
029    
030    public final class OverloadedAssignmentTranslator extends AssignmentTranslator {
031        @NotNull
032        public static JsExpression doTranslate(@NotNull KtBinaryExpression expression,
033                @NotNull TranslationContext context) {
034            return (new OverloadedAssignmentTranslator(expression, context)).translate();
035        }
036    
037        @NotNull
038        private final ResolvedCall<? extends FunctionDescriptor> resolvedCall;
039    
040        private OverloadedAssignmentTranslator(@NotNull KtBinaryExpression expression,
041                @NotNull TranslationContext context) {
042            super(expression, context);
043            resolvedCall = CallUtilKt.getFunctionResolvedCallWithAssert(expression, context.bindingContext());
044        }
045    
046        @NotNull
047        private JsExpression translate() {
048            if (isVariableReassignment) {
049                return reassignment();
050            }
051            return overloadedMethodInvocation(createAccessTranslator(expression.getLeft(), false));
052        }
053    
054        @NotNull
055        private JsExpression reassignment() {
056            AccessTranslator accessTranslator = createAccessTranslator(expression.getLeft(), false).getCached();
057            JsExpression newValue = overloadedMethodInvocation(accessTranslator);
058            return accessTranslator.translateAsSet(newValue);
059        }
060    
061        @NotNull
062        private JsExpression overloadedMethodInvocation(AccessTranslator accessTranslator) {
063            JsBlock innerBlock = new JsBlock();
064            TranslationContext innerContext = context().innerBlock(innerBlock);
065            JsExpression oldValue = accessTranslator.translateAsGet();
066            JsExpression result = CallTranslator.translate(innerContext, resolvedCall, oldValue);
067            context().addStatementsToCurrentBlockFrom(innerBlock);
068            return result;
069        }
070    }