/******************************************************************************* * Copyright (c) 2007, 2010 Association for Decentralized Information Management * in Industry THTH ry. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * VTT Technical Research Centre of Finland - initial API and implementation *******************************************************************************/ package org.simantics.document; import java.io.IOException; import java.math.BigInteger; import java.nio.file.Files; import java.nio.file.Path; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.simantics.Simantics; import org.simantics.databoard.Bindings; import org.simantics.db.ReadGraph; import org.simantics.db.Resource; import org.simantics.db.common.request.PossibleIndexRoot; import org.simantics.db.exception.DatabaseException; import org.simantics.image2.ontology.ImageResource; public class DocumentDialect { final static public DocumentDialect INSTANCE = new DocumentDialect(); public static final String SIMANTICS_INTERNAL_URI_PREFIX = "http://simantics-internal/"; private static final String HTTP = "http://"; private static final String ROOT = "root:/"; private static final String IMAGE = "image"; private static final String MEDIA = "media"; final Pattern imageOrMediaPattern = Pattern.compile("\\[\\[([Ii]mage|[Mm]edia)(?::([^\\]]+))?\\]\\]"); private static String digest(byte[] bytes) throws NoSuchAlgorithmException { MessageDigest md = MessageDigest.getInstance("MD5"); md.update(bytes); BigInteger number = new BigInteger(1, md.digest()); return number.toString(16); } private static String imageExtension(ReadGraph graph, Resource image) throws DatabaseException { ImageResource IMAGE = ImageResource.getInstance(graph); if (graph.isInstanceOf(image, IMAGE.PngImage)) return ".png"; else if (graph.isInstanceOf(image, IMAGE.JpegImage)) return ".jpg"; return null; } public String transform(ReadGraph graph, Resource res, String type, String options) { try { String[] parts = options.split("\\|"); if (parts.length > 0) { String uri = parts[0]; Resource indexRoot = graph.syncRequest(new PossibleIndexRoot(res)); if (indexRoot == null) return null; String rootURI = graph.getURI(indexRoot); uri = uri.replace(ROOT, rootURI); // (Apros #12268) For more user-friendly linking, allow users to // write white space as ' ' in the wiki-style image links instead // of having to write %20. uri = uri.replace(" ", "%20"); if (IMAGE.equals(type)) { Resource image = graph.getPossibleResource(uri); if (image == null) return null; String extension = imageExtension(graph, image); if (extension == null) return null; byte[] bytes = graph.getValue(image, Bindings.BYTE_ARRAY); String digest = digest(bytes); Path dir = Simantics.getTemporaryDirectory("documentImages").toPath(); Files.createDirectories(dir); Path f = dir.resolve(digest + extension); if (!Files.exists(f)) Files.write(f, bytes); StringBuilder sb = new StringBuilder(128); sb.append("[[File: ").append(f.toUri()); for (int i = 1; i < parts.length; i++) sb.append("|").append(parts[i]); sb.append("]]"); return sb.toString(); } else if (MEDIA.equals(type)) { Resource image = graph.getPossibleResource(uri); if (image == null) return null; StringBuilder sb = new StringBuilder(); sb.append("[").append(SIMANTICS_INTERNAL_URI_PREFIX).append(uri); for (int i = 1; i < parts.length; i++) sb.append(" ").append(parts[i]); sb.append("]"); return sb.toString(); } } } catch (DatabaseException e) { } catch (NoSuchAlgorithmException e) { } catch (IOException e) { } return null; } public String apply(ReadGraph graph, Resource res, String markup) throws DatabaseException { StringBuffer sb = new StringBuffer(); Matcher matcher = imageOrMediaPattern.matcher(markup); while(matcher.find()) { matcher.appendReplacement(sb, ""); String type = matcher.group(1); String options = matcher.group(2); String match = transform(graph, res, type.toLowerCase(), options); if(match != null) sb.append(match); else sb.append("[[Image:" + options + "]]"); } matcher.appendTail(sb); return sb.toString(); } }