001// Copyright 2004, 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.parse; 016 017import org.apache.hivemind.ApplicationRuntimeException; 018import org.apache.hivemind.Location; 019import org.apache.hivemind.util.ToStringBuilder; 020import org.apache.tapestry.IMarkupWriter; 021import org.apache.tapestry.IRender; 022import org.apache.tapestry.IRequestCycle; 023 024/** 025 * Represents static text in the template that may be passed through to the client unchanged 026 * (except, perhaps, for the removal of some whitespace). 027 * 028 * @see TokenType#TEXT 029 * @author Howard Lewis Ship 030 * @since 3.0 031 */ 032 033public class TextToken extends TemplateToken implements IRender 034{ 035 private char[] _templateData; 036 037 private int _offset; 038 039 private int _length; 040 041 public TextToken(char[] templateData, int startIndex, int endIndex, Location location) 042 { 043 super(TokenType.TEXT, location); 044 045 if (startIndex < 0 || endIndex < 0 || startIndex > templateData.length 046 || endIndex > templateData.length) 047 throw new ApplicationRuntimeException(ParseMessages.rangeError( 048 this, 049 templateData.length), this, getLocation(), null); 050 051 _templateData = templateData; 052 053 _offset = startIndex; 054 _length = endIndex - startIndex + 1; 055 } 056 057 public void render(IMarkupWriter writer, IRequestCycle cycle) 058 { 059 if (_length == 0) 060 return; 061 062 // At one time, we would check to see if the cycle was rewinding and 063 // only invoke printRaw() if it was. However, that slows down 064 // normal rendering (microscopically) and, with the new 065 // NullResponseWriter class, the "cost" of invoking cycle.isRewinding() 066 // is approximately the same as the "cost" of invoking writer.printRaw(). 067 068 writer.printRaw(_templateData, _offset, _length); 069 } 070 071 protected void extendDescription(ToStringBuilder builder) 072 { 073 builder.append("offset", _offset); 074 builder.append("length", _length); 075 } 076 077 public String getTemplateDataAsString() 078 { 079 return new String(_templateData, _offset, _length); 080 } 081 082 public int getLength() 083 { 084 return _length; 085 } 086 087 public int getOffset() 088 { 089 return _offset; 090 } 091}