/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you 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 org.apache.myfaces.buildtools.maven2.plugin.javascript.jmt.compress; | |
import java.io.File; | |
import java.io.FileReader; | |
import java.io.FileWriter; | |
import org.codehaus.plexus.util.IOUtil; | |
import org.mozilla.javascript.ErrorReporter; | |
import org.mozilla.javascript.EvaluatorException; | |
import com.yahoo.platform.yui.compressor.JavaScriptCompressor; | |
/** | |
* A JS compressor that uses Dojo modified Rhino engine to compress the script. | |
* The resulting compressed-js is garanteed to be functionaly equivalent as this | |
* is the internal view of the rhino context. | |
* | |
* @author <a href="mailto:nicolas@apache.org">nicolas De Loof</a> | |
*/ | |
public class YahooUICompressor | |
implements JSCompressor | |
{ | |
/** | |
* {@inheritDoc} | |
* | |
* @see org.apache.myfaces.buildtools.maven2.plugin.javascript.jmt.compress.mojo.javascript.compress.JSCompressor#compress(java.io.File, | |
* java.io.File, int, int) | |
*/ | |
public void compress( final File input, File compressed, int level, int language ) | |
throws CompressionException | |
{ | |
FileWriter out = null; | |
try | |
{ | |
JavaScriptCompressor compressor = | |
new JavaScriptCompressor( new FileReader( input ), new ErrorReporter() | |
{ | |
public void warning( String message, String sourceName, int line, | |
String lineSource, int lineOffset ) | |
{ | |
if ( line < 0 ) | |
{ | |
System.err.println( "\n[WARNING] " + message ); | |
} | |
else | |
{ | |
System.err.println( "\n" + line + ':' + lineOffset + ':' + message ); | |
} | |
} | |
public void error( String message, String sourceName, int line, | |
String lineSource, int lineOffset ) | |
{ | |
if ( line < 0 ) | |
{ | |
System.err.println( "\n[ERROR] " + message ); | |
} | |
else | |
{ | |
System.err.println( "\n" + line + ':' + lineOffset + ':' + message ); | |
} | |
} | |
public EvaluatorException runtimeError( String message, String sourceName, | |
int line, String lineSource, | |
int lineOffset ) | |
{ | |
error( message, sourceName, line, lineSource, lineOffset ); | |
return new EvaluatorException( message ); | |
} | |
} ); | |
int linebreakpos = level < 4 ? -1 : 80; | |
boolean munge = level < 3; | |
boolean preserveAllSemiColons = level < 2; | |
boolean preserveStringLiterals = level < 1; | |
out = new FileWriter( compressed ); | |
compressor.compress( out, linebreakpos, munge, true, preserveAllSemiColons, | |
preserveStringLiterals ); | |
} | |
catch ( Exception e ) | |
{ | |
throw new CompressionException( "Failed to create compressed file", e, input ); | |
} | |
finally | |
{ | |
IOUtil.close( out ); | |
} | |
} | |
} |