| /* |
| * Copyright 2008 The Closure Compiler Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.google.javascript.jscomp; |
| |
| import java.util.Set; |
| |
| import com.google.javascript.rhino.IR; |
| import com.google.javascript.rhino.Node; |
| import com.google.javascript.rhino.jstype.JSType; |
| import com.google.javascript.rhino.jstype.JSTypeNative; |
| |
| public class KeepRoyalePropertyNames implements CompilerPass { |
| |
| private final AbstractCompiler compiler; |
| private Set<String> propertyNamesToKeep; |
| |
| public KeepRoyalePropertyNames(AbstractCompiler compiler, Set<String> propertyNamesToKeep) { |
| this.compiler = compiler; |
| this.propertyNamesToKeep = propertyNamesToKeep; |
| } |
| |
| @Override |
| public void process(Node externs, Node root) { |
| for(String nameToKeep : propertyNamesToKeep) { |
| addExtern(nameToKeep); |
| } |
| } |
| |
| private void addExtern(String export) { |
| Node objectPrototype = NodeUtil.newQName(compiler, "Object.prototype"); |
| JSType objCtor = compiler.getTypeRegistry().getNativeType(JSTypeNative.OBJECT_FUNCTION_TYPE); |
| objectPrototype.getFirstChild().setJSType(objCtor); |
| Node propstmt = IR.exprResult(IR.getprop(objectPrototype, IR.string(export))); |
| propstmt.useSourceInfoFromForTree(getSynthesizedExternsRoot()); |
| propstmt.setOriginalName(export); |
| getSynthesizedExternsRoot().addChildToBack(propstmt); |
| compiler.reportChangeToEnclosingScope(propstmt); |
| } |
| |
| /** Lazily create a "new" externs root for undeclared variables. */ |
| private Node getSynthesizedExternsRoot() { |
| return compiler.getSynthesizedExternsInput().getAstRoot(compiler); |
| } |
| } |