| /* |
| * 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.jscomp.NodeTraversal.AbstractPostOrderCallback; |
| import com.google.javascript.rhino.IR; |
| import com.google.javascript.rhino.JSDocInfo; |
| import com.google.javascript.rhino.Node; |
| import com.google.javascript.rhino.Token; |
| import com.google.javascript.rhino.jstype.JSType; |
| import com.google.javascript.rhino.jstype.JSTypeNative; |
| |
| public class GenerateRoyaleExports extends AbstractPostOrderCallback { |
| |
| private final AbstractCompiler compiler; |
| private Set<String> extraSymbolNamesToExport; |
| |
| public GenerateRoyaleExports(AbstractCompiler compiler) { |
| this.compiler = compiler; |
| } |
| |
| public void process(Node externs, Node root, Set<String> extraSymbolNamesToExport) { |
| this.extraSymbolNamesToExport = extraSymbolNamesToExport; |
| NodeTraversal.traverse(compiler, root, this); |
| } |
| |
| @Override |
| public void visit(NodeTraversal t, Node n, Node parent) { |
| JSDocInfo docInfo = n.getJSDocInfo(); |
| if(docInfo == null || docInfo.isExport()) { |
| // if no jsdoc or already exported, we can skip |
| return; |
| } |
| |
| switch(n.getToken()) { |
| case STRING_KEY:{ |
| Node parentNode = n.getParent(); |
| if(parentNode == null) { |
| return; |
| } |
| |
| Node gpNode = parentNode.getParent(); |
| if(gpNode == null || gpNode.getToken() != Token.CALL) { |
| return; |
| } |
| |
| Node objNode = gpNode.getChildAtIndex(1); |
| if (!objNode.isQualifiedName()) { |
| return; |
| } |
| |
| String accessorQualifiedName = objNode.getQualifiedName() + "." + n.getString(); |
| if(!extraSymbolNamesToExport.contains(accessorQualifiedName)) { |
| return; |
| } |
| |
| // we found an accessor that needs to be exported |
| // accessors are defined in Object.defineProperties() calls |
| addExtern(n.getString()); |
| return; |
| } |
| case ASSIGN: { |
| Node firstChild = n.getFirstChild(); |
| if (!firstChild.isQualifiedName()) { |
| return; |
| } |
| String qualifiedName = firstChild.getQualifiedName(); |
| if(!extraSymbolNamesToExport.contains(qualifiedName)) { |
| return; |
| } |
| |
| Node parentNode = n.getParent(); |
| if(parentNode == null) { |
| return; |
| } |
| |
| Node gpNode = parentNode.getParent(); |
| if(gpNode == null || !gpNode.isScript()) { |
| return; |
| } |
| |
| // we found a variable or constant that needs to be exported |
| addExportSymbolCall(qualifiedName, n); |
| return; |
| } |
| default: |
| return; |
| } |
| } |
| |
| 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); |
| } |
| |
| private void addExportSymbolCall(String export, Node context) { |
| Node call = |
| IR.call( |
| NodeUtil.newQName( |
| compiler, compiler.getCodingConvention().getExportSymbolFunction(), |
| context, export), |
| IR.string(export), |
| NodeUtil.newQName( |
| compiler, export, |
| context, export)); |
| |
| Node expression = IR.exprResult(call).useSourceInfoIfMissingFromForTree(context); |
| annotate(expression); |
| |
| addStatement(context, expression); |
| } |
| |
| private void addStatement(Node context, Node stmt) { |
| CodingConvention convention = compiler.getCodingConvention(); |
| |
| Node n = context; |
| Node exprRoot = n; |
| while (!NodeUtil.isStatementBlock(exprRoot.getParent())) { |
| exprRoot = exprRoot.getParent(); |
| } |
| |
| // It's important that any class-building calls (goog.inherits) |
| // come right after the class definition, so move the export after that. |
| while (true) { |
| Node next = exprRoot.getNext(); |
| if (next != null |
| && NodeUtil.isExprCall(next) |
| && convention.getClassesDefinedByCall(next.getFirstChild()) != null) { |
| exprRoot = next; |
| } else { |
| break; |
| } |
| } |
| |
| Node block = exprRoot.getParent(); |
| block.addChildAfter(stmt, exprRoot); |
| compiler.reportChangeToEnclosingScope(stmt); |
| } |
| |
| private void annotate(Node node) { |
| NodeTraversal.traverse( |
| compiler, node, new PrepareAst.PrepareAnnotations()); |
| } |
| } |