| // Copyright 2013 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry5.internal.webresources; |
| |
| import com.yahoo.platform.yui.compressor.CssCompressor; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.tapestry5.ioc.OperationTracker; |
| import org.apache.tapestry5.ioc.internal.util.InternalUtils; |
| import org.apache.tapestry5.services.assets.AssetChecksumGenerator; |
| import org.apache.tapestry5.services.assets.StreamableResource; |
| import org.slf4j.Logger; |
| |
| import java.io.*; |
| |
| /** |
| * A wrapper around YUI Compressor. This module does not have a dependency on YUICompressor; |
| * isntead a local copy of the YUICompressor CSS minimizer is kept (because the reset of YUICompressor |
| * is painful to mix due to how it attempts to patch Rhino). |
| */ |
| public class CSSMinimizer extends AbstractMinimizer |
| { |
| public CSSMinimizer(Logger logger, OperationTracker tracker, AssetChecksumGenerator checksumGenerator) |
| { |
| super(logger, tracker, checksumGenerator, "text/css"); |
| } |
| |
| @Override |
| protected InputStream doMinimize(StreamableResource resource) throws IOException |
| { |
| StringWriter writer = new StringWriter(1000); |
| Reader reader = new InputStreamReader(resource.openStream()); |
| |
| try |
| { |
| new CssCompressor(reader).compress(writer, -1); |
| |
| writer.flush(); |
| |
| return IOUtils.toInputStream(writer.getBuffer()); |
| } finally |
| { |
| InternalUtils.close(reader); |
| InternalUtils.close(writer); |
| } |
| } |
| } |