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 015package org.apache.tapestry.markup; 016 017import java.io.PrintWriter; 018 019import 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 */ 029public 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}