| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.gwt.dev.jjs.impl; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| import com.google.gwt.dev.jjs.ast.Context; |
| import com.google.gwt.dev.jjs.ast.JBooleanLiteral; |
| import com.google.gwt.dev.jjs.ast.JCharLiteral; |
| import com.google.gwt.dev.jjs.ast.JDoubleLiteral; |
| import com.google.gwt.dev.jjs.ast.JFloatLiteral; |
| import com.google.gwt.dev.jjs.ast.JIntLiteral; |
| import com.google.gwt.dev.jjs.ast.JLongLiteral; |
| import com.google.gwt.dev.jjs.ast.JNullLiteral; |
| import com.google.gwt.dev.jjs.ast.JStringLiteral; |
| import com.google.gwt.dev.jjs.ast.JVisitor; |
| import com.google.gwt.dev.js.ast.JsBooleanLiteral; |
| import com.google.gwt.dev.js.ast.JsExpression; |
| import com.google.gwt.dev.js.ast.JsNameRef; |
| import com.google.gwt.dev.js.ast.JsNullLiteral; |
| import com.google.gwt.dev.js.ast.JsNumberLiteral; |
| import com.google.gwt.dev.js.ast.JsObjectLiteral; |
| import com.google.gwt.dev.js.ast.JsPropertyInitializer; |
| import com.google.gwt.dev.js.ast.JsStringLiteral; |
| import com.google.gwt.dev.js.ast.JsVisitable; |
| import com.google.gwt.lang.LongLib; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Stack; |
| |
| /** |
| * Translates Java literals into JavaScript literals. |
| */ |
| public class GenerateJavaScriptLiterals extends JVisitor { |
| |
| private final Stack<JsVisitable> nodeStack = new Stack<JsVisitable>(); |
| |
| @Override |
| public final void endVisit(JBooleanLiteral x, Context ctx) { |
| push(JsBooleanLiteral.get(x.getValue())); |
| } |
| |
| @Override |
| public final void endVisit(JCharLiteral x, Context ctx) { |
| push(new JsNumberLiteral(x.getSourceInfo(), x.getValue())); |
| } |
| |
| @Override |
| public final void endVisit(JDoubleLiteral x, Context ctx) { |
| push(new JsNumberLiteral(x.getSourceInfo(), x.getValue())); |
| } |
| |
| @Override |
| public final void endVisit(JFloatLiteral x, Context ctx) { |
| push(new JsNumberLiteral(x.getSourceInfo(), x.getValue())); |
| } |
| |
| @Override |
| public final void endVisit(JIntLiteral x, Context ctx) { |
| push(new JsNumberLiteral(x.getSourceInfo(), x.getValue())); |
| } |
| |
| @Override |
| public void endVisit(JLongLiteral x, Context ctx) { |
| SourceInfo sourceInfo = x.getSourceInfo(); |
| int[] intArray = LongLib.getAsIntArray(x.getValue()); |
| JsObjectLiteral objectLit = new JsObjectLiteral(sourceInfo); |
| List<JsPropertyInitializer> inits = objectLit.getPropertyInitializers(); |
| JsExpression label0 = new JsNameRef(sourceInfo, "l"); |
| JsExpression label1 = new JsNameRef(sourceInfo, "m"); |
| JsExpression label2 = new JsNameRef(sourceInfo, "h"); |
| JsExpression value0 = new JsNumberLiteral(sourceInfo, intArray[0]); |
| JsExpression value1 = new JsNumberLiteral(sourceInfo, intArray[1]); |
| JsExpression value2 = new JsNumberLiteral(sourceInfo, intArray[2]); |
| inits.add(new JsPropertyInitializer(sourceInfo, label0, value0)); |
| inits.add(new JsPropertyInitializer(sourceInfo, label1, value1)); |
| inits.add(new JsPropertyInitializer(sourceInfo, label2, value2)); |
| push(objectLit); |
| } |
| |
| @Override |
| public final void endVisit(JNullLiteral x, Context ctx) { |
| push(JsNullLiteral.INSTANCE); |
| } |
| |
| @Override |
| public final void endVisit(JStringLiteral x, Context ctx) { |
| push(new JsStringLiteral(x.getSourceInfo(), x.getValue())); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public final <T extends JsVisitable> T peek() { |
| return (T) nodeStack.peek(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected final <T extends JsVisitable> T pop() { |
| return (T) nodeStack.pop(); |
| } |
| |
| protected final <T extends JsVisitable> List<T> popList(int count) { |
| List<T> list = new ArrayList<T>(); |
| while (count > 0) { |
| T item = this.<T> pop(); |
| if (item != null) { |
| list.add(item); |
| } |
| --count; |
| } |
| Collections.reverse(list); |
| return list; |
| } |
| |
| protected final <T extends JsVisitable> void popList(List<T> collection, int count) { |
| List<T> list = new ArrayList<T>(); |
| while (count > 0) { |
| T item = this.<T> pop(); |
| if (item != null) { |
| list.add(item); |
| } |
| --count; |
| } |
| Collections.reverse(list); |
| collection.addAll(list); |
| } |
| |
| protected final <T extends JsVisitable> void push(T node) { |
| nodeStack.push(node); |
| } |
| } |