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.context;
018
019import com.google.dart.compiler.backend.js.ast.JsNameRef;
020import org.jetbrains.annotations.NotNull;
021import org.jetbrains.annotations.Nullable;
022import org.jetbrains.jet.lang.descriptors.ClassOrNamespaceDescriptor;
023import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
024
025public 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}