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metaxmlparse.cc

/* xmlparse.cc: subclass of HtmlParser for parsing XML.
 *
 * Copyright (C) 2006 Olly Betts
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <config.h>

#include "metaxmlparse.h"

void
MetaXmlParser::process_text(const string &text)
{
    switch (field) {
      case KEYWORDS:
          if (!keywords.empty()) keywords += ' ';
          keywords += text;
          break;
      case TITLE:
          if (!title.empty()) title += ' ';
          title += text;
          break;
      case SAMPLE:
          if (!sample.empty()) sample += ' ';
          sample += text;
          break;
      case NONE:
          // Ignore other fields.
          break;
    }
}

void
MetaXmlParser::opening_tag(const string &tag, const map<string,string> &)
{
    if (tag.size() < 8) return;
    if (tag[0] == 'd' && tag[1] == 'c') {
      if (tag == "dc:subject") {
          // dc:subject is "Subject and Keywords":
          // "Typically, Subject will be expressed as keywords, key phrases
          // or classification codes that describe a topic of the resource."
          // OpenOffice uses meta:keywords for keywords - dc:subject
          // comes from a text field labelled "Subject".  Let's just treat
          // it as more keywords.
          field = KEYWORDS;
      } else if (tag == "dc:title") {
          field = TITLE;
      } else if (tag == "dc:description") {
          field = SAMPLE;
      }
    } else if (tag[0] == 'm') {
      // e.g.:
      // <meta:keywords>
      // <meta:keyword>information retrieval</meta:keyword>
      // </meta:keywords>
      if (tag == "meta:keyword") field = KEYWORDS;
    }
}

void
MetaXmlParser::closing_tag(const string &)
{
    field = NONE;
}

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