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/** @file
* @brief Extract text from Abiword documents.
*/
/* Copyright (C) 2020,2025 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 "xmlparse.h"
#include <ctime>
#include "strptime.h"
#include "timegm.h"
using namespace std;
// Dummy std::string to point target at, but we actually parse the value into
// the time_t created member variable.
static string created_dummy_string;
bool
XmlParser::opening_tag(const string& tag)
{
if (target != nullptr ) return true;
if (tag == "m") {
string value;
if (!get_parameter("key", value)) return true;
if (value == "dc.subject") {
// Abiword uses abiword.keywords for keywords - dc.subject
// comes from a text field labelled "Subject". Let's just treat
// it as more keywords.
target = &keywords;
} else if (value == "dc.title") {
target = &title;
} else if (value == "dc.description") {
target = &sample;
} else if (value == "dc.creator" || value == "dc.contributor") {
target = &author;
} else if (value == "dc.date") {
// Seems to be used as created date (with abiword.date_last_changed
// used for the last modified date). A quick peek at the Abiword
// code suggests it preserves "dc.date" on "Save" but updates it on
// "Save As".
target = &created_dummy_string;
} else if (value == "abiword.keywords") {
target = &keywords;
}
} else if (tag == "section") {
target = &dump;
}
return true;
}
bool
XmlParser::closing_tag(const string& tag)
{
if (tag == "m" || tag == "section")
target = nullptr;
return true;
}
void
XmlParser::process_text(const string& content)
{
if (!target) return;
if (target == &created_dummy_string) {
if (created != time_t(-1)) return;
// E.g. Sun Jul 26 20:07:54 2020
struct tm tm = {};
if (strptime(content.c_str(), "%a %b %d %T %Y", &tm)) {
// Testing shows abiword writes the timestamp in the creator's
// timezone, but which timezone that is does not seem to be
// recorded in the saved file so we convert assuming UTC as that's
// at least fairly central in the range of possibilities.
created = timegm(&tm);
}
return;
}
if (!target->empty()) *target += ' ';
*target += content;
}
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