jaroslav@750: /**
jaroslav@750:  * Back 2 Browser Bytecode Translator
jaroslav@750:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@750:  *
jaroslav@750:  * This program is free software: you can redistribute it and/or modify
jaroslav@750:  * it under the terms of the GNU General Public License as published by
jaroslav@750:  * the Free Software Foundation, version 2 of the License.
jaroslav@750:  *
jaroslav@750:  * This program is distributed in the hope that it will be useful,
jaroslav@750:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@750:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@750:  * GNU General Public License for more details.
jaroslav@750:  *
jaroslav@750:  * You should have received a copy of the GNU General Public License
jaroslav@750:  * along with this program. Look for COPYING file in the top folder.
jaroslav@750:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@750:  */
jaroslav@750: package org.apidesign.vm4brwsr;
jaroslav@750: 
jaroslav@750: import com.google.javascript.jscomp.CommandLineRunner;
jaroslav@750: import com.google.javascript.jscomp.SourceFile;
jaroslav@750: import java.io.IOException;
jaroslav@750: import java.io.OutputStream;
jaroslav@750: import java.io.PrintStream;
jaroslav@750: import java.util.Collections;
jaroslav@750: import java.util.List;
jaroslav@750: import org.apidesign.bck2brwsr.core.ExtraJavaScript;
jaroslav@750: 
jaroslav@750: /**
jaroslav@750:  *
jaroslav@750:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@750:  */
jaroslav@750: @ExtraJavaScript(processByteCode = false, resource="")
jaroslav@750: final class ClosureWrapper extends CommandLineRunner implements SourceFile.Generator {
jaroslav@750:     private static final String[] ARGS = { "--compilation_level", "SIMPLE_OPTIMIZATIONS", "--js", "bck2brwsr-raw.js" };
jaroslav@750: 
jaroslav@750:     private String code;
jaroslav@750:     private final Bck2Brwsr.Resources res;
jaroslav@750:     private final StringArray classes;
lubomir@849:     private ClosureWrapper(Appendable out, ObfuscationLevel obfuscationLevel,
lubomir@849:                            Bck2Brwsr.Resources res, StringArray classes) {
jaroslav@750:         super(
lubomir@849:             generateArguments(obfuscationLevel),
jaroslav@750:             new PrintStream(new APS(out)), System.err
jaroslav@750:         );
jaroslav@750:         this.res = res;
jaroslav@750:         this.classes = classes;
jaroslav@750:     }
jaroslav@750: 
jaroslav@750:     @Override
jaroslav@750:     protected List<SourceFile> createInputs(List<String> files, boolean allowStdIn) throws FlagUsageException, IOException {
jaroslav@750:         if (files.size() != 1 || !"bck2brwsr-raw.js".equals(files.get(0))) {
jaroslav@750:             throw new IOException("Unexpected files: " + files);
jaroslav@750:         }
jaroslav@750:         return Collections.nCopies(1, SourceFile.fromGenerator("bck2brwsr-raw.js", this));
jaroslav@750:     }
jaroslav@750: 
jaroslav@750:     @Override
jaroslav@750:     public String getCode() {
jaroslav@750:         if (code == null) {
jaroslav@750:             StringBuilder sb = new StringBuilder();
jaroslav@750:             try {
jaroslav@750:                 VM.compile(res, sb, classes);
jaroslav@750:             } catch (IOException ex) {
jaroslav@750:                 code = ex.getMessage();
jaroslav@750:             }
jaroslav@750:             code = sb.toString();
jaroslav@750:         }
jaroslav@750:         return code;
jaroslav@750:     }
lubomir@849: 
jaroslav@750:     private static final class APS extends OutputStream {
jaroslav@750:         private final Appendable out;
jaroslav@750: 
jaroslav@750:         public APS(Appendable out) {
jaroslav@750:             this.out = out;
jaroslav@750:         }
jaroslav@750:         @Override
jaroslav@750:         public void write(int b) throws IOException {
jaroslav@750:             out.append((char)b);
jaroslav@750:         }
jaroslav@750:     }
lubomir@849: 
lubomir@849:     private static String[] generateArguments(
lubomir@849:             ObfuscationLevel obfuscationLevel) {
lubomir@849:         String[] finalArgs = ARGS.clone();
lubomir@849:         finalArgs[1] = obfuscationLevel.toString();
lubomir@849: 
lubomir@849:         return finalArgs;
lubomir@849:     }
lubomir@849: 
lubomir@849:     static int produceTo(Appendable w, ObfuscationLevel obfuscationLevel, Bck2Brwsr.Resources resources, StringArray arr) throws IOException {
lubomir@849:         ClosureWrapper cw = new ClosureWrapper(w, obfuscationLevel, resources,
lubomir@849:                                                arr);
jaroslav@750:         try {
jaroslav@750:             return cw.doRun();
jaroslav@750:         } catch (FlagUsageException ex) {
jaroslav@750:             throw new IOException(ex);
jaroslav@750:         }
jaroslav@750:     }
jaroslav@750: }