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.context;
018    
019    import com.google.dart.compiler.backend.js.ast.JsNameRef;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.lang.descriptors.ClassOrNamespaceDescriptor;
023    import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
024    
025    public class TraceableThisAliasProvider extends AliasingContext.AbstractThisAliasProvider {
026        private final ClassOrNamespaceDescriptor descriptor;
027        private final JsNameRef thisRef;
028        private boolean thisWasCaptured;
029    
030        public boolean wasThisCaptured() {
031            return thisWasCaptured;
032        }
033    
034        public TraceableThisAliasProvider(@NotNull ClassOrNamespaceDescriptor descriptor, @NotNull JsNameRef thisRef) {
035            this.descriptor = descriptor;
036            this.thisRef = thisRef;
037        }
038    
039        @Nullable
040        public JsNameRef getRefIfWasCaptured() {
041            return thisWasCaptured ? thisRef : null;
042        }
043    
044        @Nullable
045        @Override
046        public JsNameRef get(@NotNull DeclarationDescriptor unnormalizedDescriptor) {
047            if (descriptor == normalize(unnormalizedDescriptor)) {
048                thisWasCaptured = true;
049                return thisRef;
050            }
051    
052            return null;
053        }
054    }