bundles/org.simantics.document/src/org/simantics/document/DocumentDialect.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.document;\r
  13 \r
  14 import java.io.File;\r
  15 import java.io.IOException;\r
  16 import java.math.BigInteger;\r
  17 import java.security.MessageDigest;\r
  18 import java.security.NoSuchAlgorithmException;\r
  19 import java.util.regex.Matcher;\r
  20 import java.util.regex.Pattern;\r
  21 \r
  22 import org.simantics.Simantics;\r
  23 import org.simantics.databoard.Bindings;\r
  24 import org.simantics.db.ReadGraph;\r
  25 import org.simantics.db.Resource;\r
  26 import org.simantics.db.common.request.PossibleIndexRoot;\r
  27 import org.simantics.db.exception.DatabaseException;\r
  28 import org.simantics.image2.ontology.ImageResource;\r
  29 import org.simantics.utils.FileUtils;\r
  30 \r
  31 \r
  32 public class DocumentDialect {\r
  33     \r
  34     final Pattern imagePattern = Pattern.compile("\\[\\[Image(?::([^\\]]+))?\\]\\]");\r
  35 \r
  36         final static public DocumentDialect INSTANCE = new DocumentDialect();\r
  37 \r
  38         public String transform(ReadGraph graph, Resource res, String options) {\r
  39                 \r
  40                 try {\r
  41                         \r
  42                         String[] parts = options.split("\\|");\r
  43                         if(parts.length > 0) {\r
  44                                 \r
  45                                 String uri = parts[0];\r
  46                                 Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(res));\r
  47                                 if(indexRoot == null) return null;\r
  48                                 String rootURI = graph.getURI(indexRoot);\r
  49                                 uri = uri.replace("root:/", rootURI);\r
  50                                 // (Apros #12268) For easier image linking, allow users to\r
  51                                 // write white space as ' ' in the wiki-style image links.\r
  52                                 uri = uri.replace(" ", "%20");\r
  53                                 Resource image = graph.getPossibleResource(uri);\r
  54                                 if(image == null) return null;\r
  55                                 byte[] bytes = graph.getValue(image, Bindings.BYTE_ARRAY);\r
  56                                 MessageDigest md;\r
  57                                 md = MessageDigest.getInstance("MD5");\r
  58                                 md.update(bytes);\r
  59                                 BigInteger number = new BigInteger(1, md.digest());\r
  60                                 String digest = number.toString(16);\r
  61                                 File dir = Simantics.getTemporaryDirectory("documentImages");\r
  62                                 dir.mkdirs();\r
  63                                 \r
  64                                 ImageResource IMAGE = ImageResource.getInstance(graph);\r
  65                                 \r
  66                                 String extension;\r
  67                                 if(graph.isInstanceOf(image, IMAGE.PngImage)) extension = ".png";\r
  68                                 else if(graph.isInstanceOf(image, IMAGE.JpegImage)) extension = ".jpg";\r
  69                                 else return null;\r
  70                                 \r
  71                                 File f = new File(dir, digest + extension);\r
  72                                 if(!f.exists())\r
  73                                         FileUtils.writeFile(f, bytes);\r
  74                                 StringBuilder sb = new StringBuilder();\r
  75                                 sb.append("[[File: " + f.toURI());\r
  76                                 for(int i=1;i<parts.length;i++) {\r
  77                                         sb.append("|");\r
  78                                         sb.append(parts[i]);\r
  79                                 }\r
  80                                 sb.append("]]");\r
  81                                 return sb.toString();\r
  82                         }\r
  83                         \r
  84                 } catch (DatabaseException e) {\r
  85                 } catch (NoSuchAlgorithmException e) {\r
  86                 } catch (IOException e) {\r
  87                 }\r
  88                 \r
  89                 return null;\r
  90                 \r
  91         }\r
  92 \r
  93         public String apply(ReadGraph graph, Resource res, String markup) throws DatabaseException {\r
  94 \r
  95                 StringBuffer sb = new StringBuffer();\r
  96                 Matcher matcher = imagePattern.matcher(markup);\r
  97                 while(matcher.find()) {\r
  98                         matcher.appendReplacement(sb, "");\r
  99                         String options = matcher.group(1);\r
 100                         String match = transform(graph, res, options);\r
 101                         if(match != null) sb.append(match);\r
 102                         else sb.append("[[Image:" + options + "]]");\r
 103                 }\r
 104                 matcher.appendTail(sb);\r
 105                 return sb.toString();\r
 106 \r
 107         }\r
 108         \r
 109 }