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.evaluator.impl; 020 021import java.util.ArrayList; 022import java.util.HashMap; 023import java.util.List; 024import java.util.Map; 025 026import lucee.commons.lang.ExceptionUtil; 027import lucee.commons.lang.IDGenerator; 028import lucee.commons.lang.Md5; 029import lucee.runtime.exp.PageRuntimeException; 030import lucee.runtime.op.Caster; 031import lucee.transformer.bytecode.Page; 032import lucee.transformer.bytecode.expression.Expression; 033import lucee.transformer.bytecode.literal.LitString; 034import lucee.transformer.bytecode.op.OpString; 035import lucee.transformer.bytecode.statement.tag.Attribute; 036import lucee.transformer.bytecode.statement.tag.Tag; 037import lucee.transformer.bytecode.util.ASMUtil; 038import lucee.transformer.cfml.evaluator.EvaluatorException; 039import lucee.transformer.cfml.evaluator.EvaluatorSupport; 040import lucee.transformer.library.function.FunctionLib; 041import lucee.transformer.library.tag.TagLibTag; 042 043 044public final class Sprite extends EvaluatorSupport { 045 046 private static final Expression DELIMITER = LitString.toExprString(","); 047 private static Map<String,Previous> sprites=new HashMap<String,Previous>(); 048 049 050 051 052 /** 053 * 054 * @see lucee.transformer.cfml.evaluator.EvaluatorSupport#evaluate(lucee.transformer.bytecode.statement.tag.Tag, lucee.transformer.library.tag.TagLibTag, lucee.transformer.library.function.FunctionLib[]) 055 */ 056 public void evaluate(Tag tag,TagLibTag tagLibTag,FunctionLib[] flibs) throws EvaluatorException { 057 String id="sprite_"+IDGenerator.intId(); 058 try { 059 Page page = ASMUtil.getAncestorPage(tag); 060 String key=Md5.getDigestAsString(Thread.currentThread().getId()+":"+page.getPageSource().getDisplayPath()); 061 Expression src = tag.getAttribute("src").getValue(); 062 063 064 // get data from previous sprites 065 Previous previous = sprites.get(key); 066 if(previous!=null) { 067 previous.tag.removeAttribute("_ids"); 068 previous.tag.removeAttribute("_srcs"); 069 previous.tag=tag; 070 } 071 else { 072 sprites.put(key, previous = new Previous(tag)); 073 } 074 075 previous.ids.add(id); 076 if(previous.src==null)previous.src=src; 077 else { 078 previous.src=OpString.toExprString(previous.src,DELIMITER); 079 previous.src=OpString.toExprString(previous.src,src); 080 } 081 082 083 084 tag.addAttribute( 085 new Attribute( 086 false, 087 "_id", 088 LitString.toExprString(id), 089 "string" 090 )); 091 tag.addAttribute( 092 new Attribute( 093 false, 094 "_ids", 095 LitString.toExprString(lucee.runtime.type.util.ListUtil.listToList(previous.ids, ",")), 096 "string" 097 )); 098 099 tag.addAttribute( 100 new Attribute( 101 false, 102 "_srcs", 103 previous.src, 104 "string" 105 )); 106 107 } 108 catch (Throwable e) {// TODO handle Excpetion much more precise 109 ExceptionUtil.rethrowIfNecessary(e); 110 throw new PageRuntimeException(Caster.toPageException(e)); 111 } 112 113 } 114 115 private static class Previous { 116 public Previous(Tag tag) { 117 this.tag=tag; 118 } 119 private List<String> ids=new ArrayList<String>(); 120 private Expression src=null; 121 private Tag tag; 122 123 } 124 125}