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 org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
021    import org.jetbrains.kotlin.js.backend.ast.JsBlock;
022    import org.jetbrains.kotlin.js.backend.ast.JsExpression;
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.general.Translation;
026    import org.jetbrains.kotlin.js.translate.reference.AccessTranslationUtils;
027    import org.jetbrains.kotlin.js.translate.reference.AccessTranslator;
028    import org.jetbrains.kotlin.psi.KtBinaryExpression;
029    import org.jetbrains.kotlin.psi.KtExpression;
030    import org.jetbrains.kotlin.resolve.calls.callUtil.CallUtilKt;
031    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
032    
033    import java.util.HashMap;
034    import java.util.Map;
035    
036    public final class OverloadedAssignmentTranslator extends AssignmentTranslator {
037        @NotNull
038        public static JsExpression doTranslate(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
039            return (new OverloadedAssignmentTranslator(expression, context)).translate();
040        }
041    
042        @NotNull
043        private final ResolvedCall<? extends FunctionDescriptor> resolvedCall;
044    
045        private OverloadedAssignmentTranslator(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
046            super(expression, context);
047            resolvedCall = CallUtilKt.getFunctionResolvedCallWithAssert(expression, context.bindingContext());
048        }
049    
050        @NotNull
051        private JsExpression translate() {
052            if (isVariableReassignment) {
053                return reassignment();
054            }
055            KtExpression left = expression.getLeft();
056            assert left != null;
057            return overloadedMethodInvocation(AccessTranslationUtils.getAccessTranslator(left, context()));
058        }
059    
060        @NotNull
061        private JsExpression reassignment() {
062            KtExpression left = expression.getLeft();
063            assert left != null;
064            AccessTranslator accessTranslator = AccessTranslationUtils.getAccessTranslator(left, context()).getCached();
065            JsExpression newValue = overloadedMethodInvocation(accessTranslator);
066            return accessTranslator.translateAsSet(newValue);
067        }
068    
069        @NotNull
070        private JsExpression overloadedMethodInvocation(AccessTranslator accessTranslator) {
071            JsBlock innerBlock = new JsBlock();
072            TranslationContext innerContext = context().innerBlock(innerBlock);
073            JsExpression oldValue = accessTranslator.translateAsGet();
074    
075            JsBlock argumentBlock = new JsBlock();
076            TranslationContext argumentContext = innerContext.innerBlock(argumentBlock);
077            KtExpression argumentPsi = expression.getRight();
078            assert argumentPsi != null;
079            JsExpression argument = Translation.translateAsExpression(argumentPsi, argumentContext);
080            if (!argumentBlock.isEmpty()) {
081                oldValue = innerContext.defineTemporary(oldValue);
082                innerContext.addStatementsToCurrentBlockFrom(argumentBlock);
083            }
084    
085            Map<KtExpression, JsExpression> aliases = new HashMap<KtExpression, JsExpression>();
086            aliases.put(argumentPsi, argument);
087            innerContext = innerContext.innerContextWithAliasesForExpressions(aliases);
088    
089            JsExpression result = CallTranslator.translate(innerContext, resolvedCall, oldValue);
090            context().addStatementsToCurrentBlockFrom(innerBlock);
091            return result;
092        }
093    }