Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.document / src / org / simantics / document / DocumentDialect.java

diff --git a/bundles/org.simantics.document/src/org/simantics/document/DocumentDialect.java b/bundles/org.simantics.document/src/org/simantics/document/DocumentDialect.java
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index 0000000..9fc8e98
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+++ b/bundles/org.simantics.document/src/org/simantics/document/DocumentDialect.java
@@ -0,0 +1,109 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.document;\r
+\r
+import java.io.File;\r
+import java.io.IOException;\r
+import java.math.BigInteger;\r
+import java.security.MessageDigest;\r
+import java.security.NoSuchAlgorithmException;\r
+import java.util.regex.Matcher;\r
+import java.util.regex.Pattern;\r
+\r
+import org.simantics.Simantics;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.request.PossibleIndexRoot;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.image2.ontology.ImageResource;\r
+import org.simantics.utils.FileUtils;\r
+\r
+\r
+public class DocumentDialect {\r
+    \r
+    final Pattern imagePattern = Pattern.compile("\\[\\[Image(?::([^\\]]+))?\\]\\]");\r
+\r
+       final static public DocumentDialect INSTANCE = new DocumentDialect();\r
+\r
+       public String transform(ReadGraph graph, Resource res, String options) {\r
+               \r
+               try {\r
+                       \r
+                       String[] parts = options.split("\\|");\r
+                       if(parts.length > 0) {\r
+                               \r
+                               String uri = parts[0];\r
+                               Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(res));\r
+                               if(indexRoot == null) return null;\r
+                               String rootURI = graph.getURI(indexRoot);\r
+                               uri = uri.replace("root:/", rootURI);\r
+                               // (Apros #12268) For easier image linking, allow users to\r
+                               // write white space as ' ' in the wiki-style image links.\r
+                               uri = uri.replace(" ", "%20");\r
+                               Resource image = graph.getPossibleResource(uri);\r
+                               if(image == null) return null;\r
+                               byte[] bytes = graph.getValue(image, Bindings.BYTE_ARRAY);\r
+                               MessageDigest md;\r
+                               md = MessageDigest.getInstance("MD5");\r
+                               md.update(bytes);\r
+                               BigInteger number = new BigInteger(1, md.digest());\r
+                               String digest = number.toString(16);\r
+                               File dir = Simantics.getTemporaryDirectory("documentImages");\r
+                               dir.mkdirs();\r
+                               \r
+                               ImageResource IMAGE = ImageResource.getInstance(graph);\r
+                               \r
+                               String extension;\r
+                               if(graph.isInstanceOf(image, IMAGE.PngImage)) extension = ".png";\r
+                               else if(graph.isInstanceOf(image, IMAGE.JpegImage)) extension = ".jpg";\r
+                               else return null;\r
+                               \r
+                               File f = new File(dir, digest + extension);\r
+                               if(!f.exists())\r
+                                       FileUtils.writeFile(f, bytes);\r
+                               StringBuilder sb = new StringBuilder();\r
+                               sb.append("[[File: " + f.toURI());\r
+                               for(int i=1;i<parts.length;i++) {\r
+                                       sb.append("|");\r
+                                       sb.append(parts[i]);\r
+                               }\r
+                               sb.append("]]");\r
+                               return sb.toString();\r
+                       }\r
+                       \r
+               } catch (DatabaseException e) {\r
+               } catch (NoSuchAlgorithmException e) {\r
+               } catch (IOException e) {\r
+               }\r
+               \r
+               return null;\r
+               \r
+       }\r
+\r
+       public String apply(ReadGraph graph, Resource res, String markup) throws DatabaseException {\r
+\r
+               StringBuffer sb = new StringBuffer();\r
+               Matcher matcher = imagePattern.matcher(markup);\r
+               while(matcher.find()) {\r
+                       matcher.appendReplacement(sb, "");\r
+                       String options = matcher.group(1);\r
+                       String match = transform(graph, res, options);\r
+                       if(match != null) sb.append(match);\r
+                       else sb.append("[[Image:" + options + "]]");\r
+               }\r
+               matcher.appendTail(sb);\r
+               return sb.toString();\r
+\r
+       }\r
+       \r
+}
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