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/*************************************************************************
** HtmlSpecialHandler.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2023 Martin Gieseking <martin.gieseking@uos.de> **
** **
** 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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include "HtmlSpecialHandler.hpp"
#include "HyperlinkManager.hpp"
#include "InputReader.hpp"
#include "SpecialActions.hpp"
using namespace std;
void HtmlSpecialHandler::preprocess (const string&, istream &is, SpecialActions &actions) {
StreamInputReader ir(is);
ir.skipSpace();
// collect page number and ID of named anchors
map<string,string> attribs;
if (ir.check("<a ") && ir.parseAttributes(attribs, true, "\"") > 0) {
map<string,string>::iterator it;
if ((it = attribs.find("name")) != attribs.end())
HyperlinkManager::instance().addNameAchor(it->second, actions.getCurrentPageNumber());
else if ((it = attribs.find("href")) != attribs.end())
HyperlinkManager::instance().addHrefAnchor(it->second);
}
}
bool HtmlSpecialHandler::process (const string&, istream &is, SpecialActions &actions) {
_active = true;
StreamInputReader ir(is);
ir.skipSpace();
map<string,string> attribs;
map<string,string>::iterator it;
if (ir.check("<a ") && ir.parseAttributes(attribs, true, "\"") > 0) {
if ((it = attribs.find("href")) != attribs.end()) // <a href="URI">
HyperlinkManager::instance().createLink(it->second, actions);
else if ((it = attribs.find("name")) != attribs.end()) // <a name="ID">
HyperlinkManager::instance().setActiveNameAnchor(it->second, actions);
else
return false; // none or only invalid attributes
}
else if (ir.check("</a>"))
HyperlinkManager::instance().closeAnchor(actions);
else if (ir.check("<img src=")) {
}
else if (ir.check("<base ") && ir.parseAttributes(attribs, true, "\"") > 0 && (it = attribs.find("href")) != attribs.end())
HyperlinkManager::instance().setBaseUrl(it->second);
return true;
}
/** This method is called every time the DVI position changes. */
void HtmlSpecialHandler::dviMovedTo (double x, double y, SpecialActions &actions) {
if (_active)
HyperlinkManager::instance().checkNewLine(actions);
}
void HtmlSpecialHandler::dviEndPage (unsigned pageno, SpecialActions &actions) {
if (_active) {
HyperlinkManager::instance().createViews(pageno, actions);
_active = false;
}
}
vector<const char*> HtmlSpecialHandler::prefixes() const {
vector<const char*> pfx {"html:"};
return pfx;
}
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