/**
* 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.jooby.assets;
import java.io.StringReader;
import java.io.StringWriter;
import org.jooby.MediaType;
import org.mozilla.javascript.ErrorReporter;
import org.mozilla.javascript.EvaluatorException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.collect.ImmutableList;
import com.typesafe.config.Config;
import com.yahoo.platform.yui.compressor.JavaScriptCompressor;
/**
* <h1>yui-js</h1>
* <p>
* <a href="http://yui.github.io/yuicompressor">Yui js compressor</a>.
* </p>
*
* <h2>usage</h2>
*
* <pre>
* assets {
* fileset {
* home: [js/home.js]
* }
*
* pipeline {
* ...
* dist: [yui-js]
* }
* }
* </pre>
*
* <h2>options</h2>
*
* <pre>
* assets {
* ...
* yui-js {
* munge: true
* preserve-semi: true
* }
* }
* </pre>
*
* @author edgar
* @since 0.11.0
*/
public class YuiJs extends AssetProcessor {
/** The logging system. */
private final Logger log = LoggerFactory.getLogger(getClass());
{
set("munge", true);
set("preserve-semi", true);
set("disable-optimizations", false);
set("linebreakpos", -1);
set("verbose", false);
}
@Override
public boolean matches(final MediaType type) {
return MediaType.js.matches(type);
}
@Override
public String process(final String filename, final String source, final Config conf)
throws Exception {
ErrorReporter reporter = reporter(log, filename, name());
JavaScriptCompressor compressor = new JavaScriptCompressor(new StringReader(source), reporter);
StringWriter out = new StringWriter();
compressor.compress(out, get("linebreakpos"), get("munge"), get("verbose"),
get("preserve-semi"), get("disable-optimizations"));
return out.toString();
}
private static ErrorReporter reporter(final Logger log, final String filename, final String name) {
return new ErrorReporter() {
@Override
public void warning(final String message, final String sourceName, final int line,
final String lineSource, final int lineOffset) {
log.warn("{}:{}:{}:{}", filename, line, lineOffset, message);
}
@Override
public EvaluatorException runtimeError(final String message, final String sourceName,
final int line,
final String lineSource, final int lineOffset) {
return new EvaluatorException(message, filename, line, lineSource, lineOffset);
}
@Override
public void error(final String message, final String sourceName, final int line,
final String lineSource, final int lineOffset) {
throw new AssetException(name,
ImmutableList.of(new AssetProblem(filename, line, lineOffset, message, null)));
}
};
}
}