001// Copyright 2011 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.internal.yuicompressor; 016 017import com.yahoo.platform.yui.compressor.CssCompressor; 018import org.apache.tapestry5.ioc.OperationTracker; 019import org.apache.tapestry5.services.assets.StreamableResource; 020import org.slf4j.Logger; 021 022import java.io.IOException; 023import java.io.Reader; 024import java.io.Writer; 025 026/** 027 * Uses {@link CssCompressor} to reduce the size of CSS content. 028 * 029 * @since 5.3 030 */ 031public class CSSResourceMinimizer extends AbstractMinimizer 032{ 033 public CSSResourceMinimizer(Logger logger, OperationTracker tracker) 034 { 035 super(logger, tracker, "CSS"); 036 } 037 038 @Override 039 protected void doMinimize(StreamableResource input, Writer output) throws IOException 040 { 041 Reader reader = toReader(input); 042 043 try 044 { 045 new CssCompressor(reader).compress(output, -1); 046 } finally 047 { 048 reader.close(); 049 } 050 } 051 052}