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annotate software/eXist/mpdl-modules/src/org/exist/xquery/modules/mpdldoc/Html2Pdf.java @ 0:408254cf2f1d

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Erstellung
author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Wed, 24 Nov 2010 17:24:23 +0100
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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1 /*
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2 * eXist Open Source Native XML Database: Extension module
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3 * Copyright (C) 2008 Josef Willenborg
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4 * jwillenborg@mpiwg-berlin.mpg.de
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5 * http://www.mpiwg-berlin.mpg.de
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6 *
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7 * This program is free software; you can redistribute it and/or
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation; either version 2
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10 * of the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 * GNU Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public License
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18 * along with this program; if not, write to the Free Software
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19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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20 *
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21 * $Id: $
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22 */
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23 package org.exist.xquery.modules.mpdldoc;
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24
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25 import org.exist.dom.QName;
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26 import org.exist.storage.serializers.Serializer;
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27 import org.exist.xquery.BasicFunction;
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28 import org.exist.xquery.Cardinality;
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29 import org.exist.xquery.FunctionSignature;
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30 import org.exist.xquery.XPathException;
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31 import org.exist.xquery.XQueryContext;
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32 import org.exist.xquery.value.Base64Binary;
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33 import org.exist.xquery.value.NodeValue;
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34 import org.exist.xquery.value.Sequence;
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35 import org.exist.xquery.value.SequenceType;
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36 import org.exist.xquery.value.Type;
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37 import org.xml.sax.SAXException;
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38
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39 import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
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40 import de.mpg.mpiwg.berlin.mpdl.util.MpdlITextRenderer;
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41 import de.mpg.mpiwg.berlin.mpdl.util.StringUtilEscapeChars;
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42
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43 /**
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44 * @author Josef Willenborg (jwillenborg@mpiwg-berlin.mpg.de)
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45 */
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46 public class Html2Pdf extends BasicFunction {
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47
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48 public final static FunctionSignature signature =
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49 new FunctionSignature(
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50 new QName("html2pdf", MPDLDocModule.NAMESPACE_URI, MPDLDocModule.PREFIX),
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51 "A function which converts the input HTML fragment to pdf",
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52 new SequenceType[] {
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53 new SequenceType(Type.NODE, Cardinality.EXACTLY_ONE),
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54 new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE),
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55 new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE),
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56 new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE),
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57 new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE),
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58 new SequenceType(Type.STRING, Cardinality.EXACTLY_ONE)
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59 },
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60 new SequenceType(Type.BYTE, Cardinality.EXACTLY_ONE));
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61
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62 public Html2Pdf(XQueryContext context) {
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63 super(context, signature);
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64 }
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65
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66 public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
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67 try {
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68 Sequence firstSeq = args[0];
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69 Sequence secondSeq = args[1];
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70 Sequence thirdSeq = args[2];
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71 Sequence fourthSeq = args[3];
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72 Sequence fifthSeq = args[4];
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73 Sequence sixthSeq = args[5];
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74 if (firstSeq.isEmpty() || secondSeq.isEmpty() || thirdSeq.isEmpty() || fourthSeq.isEmpty() || fifthSeq.isEmpty() || sixthSeq.isEmpty())
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75 return Sequence.EMPTY_SEQUENCE;
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76 NodeValue nodeValue= (NodeValue) firstSeq.itemAt(0);
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77 Serializer serializer = context.getBroker().getSerializer();
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78 serializer.reset();
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79 String nodeValueStr = serializer.serialize(nodeValue);
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80
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81 String language = secondSeq.getStringValue();
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82 String topLeftStrTmp = thirdSeq.getStringValue();
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83 String topRightStrTmp = fourthSeq.getStringValue();
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84 String bottomLeftStrTmp = fifthSeq.getStringValue();
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85 String bottomRightStrTmp = sixthSeq.getStringValue();
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86 String topLeftStr = "&quot;" + StringUtilEscapeChars.deresolveXmlEntities(topLeftStrTmp) + "&quot;";
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87 String topRightStr = "&quot;" + StringUtilEscapeChars.deresolveXmlEntities(topRightStrTmp) + "&quot;";
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88 String bottomLeftStr = "&quot;" + StringUtilEscapeChars.deresolveXmlEntities(bottomLeftStrTmp) + "&quot;";
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89 String bottomRightStr = "&quot;" + StringUtilEscapeChars.deresolveXmlEntities(bottomRightStrTmp) + "&quot;";
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90
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91 MpdlITextRenderer mpdlRenderer = MpdlITextRenderer.getInstance();
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92 String singlePageStr = nodeValueStr.replaceAll("class=\"page\">", "class=\"singlePage\">");
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93 byte[] pdfBytes = mpdlRenderer.createPdf(singlePageStr, language, topLeftStr, topRightStr, bottomLeftStr, bottomRightStr);
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94
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95 return new Base64Binary(pdfBytes);
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96 } catch (ApplicationException e) {
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97 throw new XPathException(e.getMessage());
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98 } catch (SAXException e) {
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99 throw new XPathException(e);
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100 }
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101 }
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102 }