001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.transformer.cfml.expression; 020 021import lucee.runtime.exp.TemplateException; 022import lucee.transformer.bytecode.Page; 023import lucee.transformer.bytecode.Position; 024import lucee.transformer.bytecode.expression.ExprString; 025import lucee.transformer.bytecode.expression.Expression; 026import lucee.transformer.bytecode.literal.LitString; 027import lucee.transformer.cfml.ExprTransformer; 028import lucee.transformer.cfml.TransfomerSettings; 029import lucee.transformer.cfml.evaluator.EvaluatorPool; 030import lucee.transformer.library.function.FunctionLib; 031import lucee.transformer.library.tag.TagLib; 032import lucee.transformer.library.tag.TagLibTag; 033import lucee.transformer.util.CFMLString; 034 035/** 036 * Zum lesen von Attributen bei dem CFML expressions nicht geparst werden sollen (cfloop condition) 037 */ 038public final class SimpleExprTransformer implements ExprTransformer { 039 040 private char specialChar; 041 042 public SimpleExprTransformer(char specialChar) { 043 this.specialChar=specialChar; 044 } 045 046 @Override 047 public Expression transformAsString(Page page,EvaluatorPool ep,TagLib[][] tld,FunctionLib[] fld,TagLibTag[] scriptTags, CFMLString cfml, TransfomerSettings settings,boolean allowLowerThan) throws TemplateException { 048 return transform(page,ep,tld,fld,scriptTags, cfml,settings); 049 } 050 051 @Override 052 public Expression transform(Page page,EvaluatorPool ep,TagLib[][] tld,FunctionLib[] fld,TagLibTag[] scriptTags, CFMLString cfml, TransfomerSettings settings) throws TemplateException { 053 Expression expr=null; 054 // String 055 if((expr=string(cfml))!=null) { 056 return expr; 057 } 058 // Simple 059 return simple(cfml); 060 } 061 /** 062 * Liest den String ein 063 * @return Element 064 * @throws TemplateException 065 */ 066 public Expression string(CFMLString cfml) 067 throws TemplateException { 068 cfml.removeSpace(); 069 char quoter=cfml.getCurrentLower(); 070 if(quoter!='"' && quoter!='\'') 071 return null; 072 StringBuffer str=new StringBuffer(); 073 boolean insideSpecial=false; 074 075 Position line = cfml.getPosition(); 076 while(cfml.hasNext()) { 077 cfml.next(); 078 // check special 079 if(cfml.isCurrent(specialChar)) { 080 insideSpecial=!insideSpecial; 081 str.append(specialChar); 082 083 } 084 // check quoter 085 else if(!insideSpecial && cfml.isCurrent(quoter)) { 086 // Ecaped sharp 087 if(cfml.isNext(quoter)){ 088 cfml.next(); 089 str.append(quoter); 090 } 091 // finsish 092 else { 093 break; 094 } 095 } 096 // all other character 097 else { 098 str.append(cfml.getCurrent()); 099 } 100 } 101 102 103 if(!cfml.forwardIfCurrent(quoter)) 104 throw new TemplateException(cfml,"Invalid Syntax Closing ["+quoter+"] not found"); 105 106 ExprString rtn = LitString.toExprString(str.toString(),line,cfml.getPosition()); 107 cfml.removeSpace(); 108 return rtn; 109 } 110 111 /** 112 * Liest ein 113 * @return Element 114 * @throws TemplateException 115 */ 116 public Expression simple(CFMLString cfml) throws TemplateException { 117 StringBuffer sb=new StringBuffer(); 118 Position line = cfml.getPosition(); 119 while(cfml.isValidIndex()) { 120 if(cfml.isCurrent(' ') || cfml.isCurrent('>') || cfml.isCurrent("/>")) break; 121 else if(cfml.isCurrent('"') || cfml.isCurrent('#') || cfml.isCurrent('\'')) { 122 throw new TemplateException(cfml,"simple attribute value can't contain ["+cfml.getCurrent()+"]"); 123 } 124 else sb.append(cfml.getCurrent()); 125 cfml.next(); 126 } 127 cfml.removeSpace(); 128 129 return LitString.toExprString(sb.toString(),line,cfml.getPosition()); 130 } 131 132 133}