writerperfect/source/common/DocumentHandler.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   6  *
   7  * For further information visit http://libwpd.sourceforge.net
   8  */
   9
  10 #include <DocumentHandler.hxx>
  11
  12 #include <string.h>
  13
  14 #include <com/sun/star/uno/Reference.hxx>
  15 #include <com/sun/star/xml/sax/XDocumentHandler.hpp>
  16 #include <com/sun/star/xml/sax/XAttributeList.hpp>
  17 #include <comphelper/attributelist.hxx>
  18 #include <xmloff/xmlimp.hxx>
  19
  20 namespace writerperfect
  21 {
  22 const unsigned char librvng_utf8_skip_data[256]
  23     = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  24         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  25         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  26         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  27         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  28         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  29         1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  30         2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
  31         3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 1, 1 };
  32
  33 static const char* librvng_utf8_next_char(const char* p)
  34 {
  35     return p + librvng_utf8_skip_data[*reinterpret_cast<unsigned char const*>(p)];
  36 }
  37
  38 static void unescapeXML(const char* s, const unsigned long sz, librevenge::RVNGString& res)
  39 {
  40     const char* p = s;
  41     const char* const end = p + sz;
  42     while (p != end)
  43     {
  44         const char* const next = librvng_utf8_next_char(p);
  45         if (next > end)
  46         {
  47             // oops, the string is invalid
  48             break;
  49         }
  50         if (p + 4 <= end && p + 1 == next && *p == '&')
  51         {
  52             // look for &amp; , &lt; , &gt; , &apos; , &quot;
  53             bool escapedChar = false;
  54             switch (*(p + 1))
  55             {
  56                 case 'a':
  57                     if (p + 5 <= end && strncmp(p, "&amp;", 5) == 0)
  58                     {
  59                         res.append('&');
  60                         p += 5;
  61                         escapedChar = true;
  62                     }
  63                     else if (p + 6 <= end && strncmp(p, "&apos;", 6) == 0)
  64                     {
  65                         res.append('\'');
  66                         p += 6;
  67                         escapedChar = true;
  68                     }
  69                     break;
  70                 case 'g':
  71                     if (strncmp(p, "&gt;", 4) == 0)
  72                     {
  73                         res.append('>');
  74                         p += 4;
  75                         escapedChar = true;
  76                     }
  77                     break;
  78                 case 'l':
  79                     if (strncmp(p, "&lt;", 4) == 0)
  80                     {
  81                         res.append('<');
  82                         p += 4;
  83                         escapedChar = true;
  84                     }
  85                     break;
  86                 case 'q':
  87                     if (p + 6 <= end && strncmp(p, "&quot;", 6) == 0)
  88                     {
  89                         res.append('"');
  90                         p += 6;
  91                         escapedChar = true;
  92                     }
  93                     break;
  94                 default:
  95                     break;
  96             }
  97             if (escapedChar)
  98                 continue;
  99         }
 100
 101         while (p != next)
 102         {
 103             res.append(*p);
 104             ++p;
 105         }
 106         p = next;
 107     }
 108 }
 109
 110 using com::sun::star::uno::Reference;
 111 using com::sun::star::xml::sax::XDocumentHandler;
 112
 113 DocumentHandler::DocumentHandler(Reference<XDocumentHandler> const& xHandler)
 114     : mxHandler(xHandler)
 115 {
 116     if (SvXMLImport* pFastHandler = dynamic_cast<SvXMLImport*>(mxHandler.get()))
 117         mxHandler.set(new SvXMLLegacyToFastDocHandler(pFastHandler));
 118 }
 119
 120 void DocumentHandler::startDocument() { mxHandler->startDocument(); }
 121
 122 void DocumentHandler::endDocument() { mxHandler->endDocument(); }
 123
 124 void DocumentHandler::startElement(const char* psName,
 125                                    const librevenge::RVNGPropertyList& xPropList)
 126 {
 127     rtl::Reference<comphelper::AttributeList> pAttrList = new comphelper::AttributeList();
 128     librevenge::RVNGPropertyList::Iter i(xPropList);
 129     for (i.rewind(); i.next();)
 130     {
 131         // filter out librevenge elements
 132         if (strncmp(i.key(), "librevenge", 10) != 0)
 133         {
 134             size_t keyLength = strlen(i.key());
 135             OUString sName(i.key(), keyLength, RTL_TEXTENCODING_UTF8);
 136             OUString sValue(i()->getStr().cstr(), i()->getStr().len(), RTL_TEXTENCODING_UTF8);
 137
 138             // libodfgen xml-encodes some attribute's value, so check if the value is encoded or not
 139             for (int j = 0; j < 9; ++j)
 140             {
 141                 // list of the encoded attributes followed by their lengths
 142                 static char const* listEncoded[9]
 143                     = { "draw:name",        "svg:font-family",  "style:condition",
 144                         "style:num-prefix", "style:num-suffix", "table:formula",
 145                         "text:bullet-char", "text:label",       "xlink:href" };
 146                 static size_t const listEncodedLength[9] = { 9, 15, 15, 16, 16, 13, 16, 10, 10 };
 147                 if (keyLength == listEncodedLength[j]
 148                     && strncmp(i.key(), listEncoded[j], keyLength) == 0)
 149                 {
 150                     librevenge::RVNGString decodedValue("");
 151                     unescapeXML(i()->getStr().cstr(),
 152                                 static_cast<unsigned long>(i()->getStr().len()), decodedValue);
 153                     sValue
 154                         = OUString(decodedValue.cstr(), decodedValue.len(), RTL_TEXTENCODING_UTF8);
 155                     break;
 156                 }
 157             }
 158             pAttrList->AddAttribute(sName, sValue);
 159         }
 160     }
 161
 162     OUString sElementName(psName, strlen(psName), RTL_TEXTENCODING_UTF8);
 163     mxHandler->startElement(sElementName, pAttrList);
 164 }
 165
 166 void DocumentHandler::endElement(const char* psName)
 167 {
 168     OUString sElementName(psName, strlen(psName), RTL_TEXTENCODING_UTF8);
 169     mxHandler->endElement(sElementName);
 170 }
 171
 172 void DocumentHandler::characters(const librevenge::RVNGString& sCharacters)
 173 {
 174     OUString sCharU16(sCharacters.cstr(), strlen(sCharacters.cstr()), RTL_TEXTENCODING_UTF8);
 175     mxHandler->characters(sCharU16);
 176 }
 177 }
 178
 179 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */