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
017package org.jetbrains.k2js.translate.utils.dangerous;
018
019import com.google.common.collect.Maps;
020import com.google.dart.compiler.backend.js.ast.JsExpression;
021import com.google.dart.compiler.backend.js.ast.JsName;
022import com.google.dart.compiler.backend.js.ast.JsNode;
023import org.jetbrains.annotations.NotNull;
024import org.jetbrains.jet.lang.psi.JetExpression;
025import org.jetbrains.k2js.translate.context.TemporaryVariable;
026import org.jetbrains.k2js.translate.context.TranslationContext;
027import org.jetbrains.k2js.translate.general.AbstractTranslator;
028import org.jetbrains.k2js.translate.general.Translation;
029
030import java.util.List;
031import java.util.Map;
032
033public final class DangerousTranslator extends AbstractTranslator {
034    @NotNull
035    private final DangerousData data;
036
037    @NotNull
038    public static JsNode translate(@NotNull DangerousData data, @NotNull TranslationContext context) {
039        assert data.exists();
040        return new DangerousTranslator(data, context).translate();
041    }
042
043    private DangerousTranslator(@NotNull DangerousData data, @NotNull TranslationContext context) {
044        super(context);
045        this.data = data;
046    }
047
048    @NotNull
049    private JsNode translate() {
050        Map<JetExpression, JsName> aliasesForExpressions =
051            translateAllExpressionsAndCreateAliasesForThem(data.getNodesToBeGeneratedBefore());
052        TranslationContext contextWithAliases = context().innerContextWithAliasesForExpressions(aliasesForExpressions);
053        return Translation.doTranslateExpression(data.getRootNode(), contextWithAliases);
054    }
055
056    @NotNull
057    private Map<JetExpression, JsName> translateAllExpressionsAndCreateAliasesForThem(@NotNull List<JetExpression> expressions) {
058        Map<JetExpression, JsName> aliasesForExpressions = Maps.newHashMap();
059        for (JetExpression expression : expressions) {
060            JsExpression translatedExpression = Translation.translateAsExpression(expression, context());
061            TemporaryVariable aliasForExpression = context().declareTemporary(translatedExpression);
062            context().addStatementToCurrentBlock(aliasForExpression.assignmentExpression().makeStmt());
063            aliasesForExpressions.put(expression, aliasForExpression.name());
064        }
065        return aliasesForExpressions;
066    }
067}