001 // Copyright 2005 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. 014 015 package org.apache.tapestry.markup; 016 017 import java.io.PrintWriter; 018 019 import org.apache.tapestry.util.text.ICharacterTranslator; 020 021 /** 022 * For the meantime, implemenatations of {@link org.apache.tapestry.markup.MarkupFilter} are 023 * wrappers around {@link org.apache.tapestry.util.text.ICharacterTranslator}. This class provides 024 * handy methods for doing the grunt work. 025 * 026 * @author Howard M. Lewis Ship 027 * @since 4.0 028 */ 029 public class MarkupFilterUtils 030 { 031 public static void print(PrintWriter writer, char[] data, int offset, int length, 032 boolean escapeQuotes, ICharacterTranslator translator) 033 { 034 StringBuffer buffer = new StringBuffer(length); 035 036 for (int i = 0; i < length; i++) 037 { 038 char ch = data[offset + i]; 039 040 if (ch == '"' && !escapeQuotes) 041 { 042 buffer.append(ch); 043 continue; 044 } 045 046 String translated = translator.translate(ch); 047 048 if (translated == null) 049 { 050 buffer.append(ch); 051 continue; 052 } 053 054 buffer.append(translated); 055 } 056 057 // We'll have to see if building up a buffer and then printing it in one go is the 058 // most efficient route. It's hard to predict what will give the best performance, 059 // but there's almost certainly a buffered writer between this code and the 060 // character set encoder. 061 062 writer.print(buffer.toString()); 063 } 064 }