/*************************************************************************
** GlyphTracerMessages.hpp                                              **
**                                                                      **
** 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/>. **
*************************************************************************/

#ifndef GLYPHTRACERMESSAGES_HPP
#define GLYPHTRACERMESSAGES_HPP

#include <sstream>
#include "GFGlyphTracer.hpp"
#include "Message.hpp"

class GlyphTracerMessages : public GFGlyphTracer::Callback {
	public:
		GlyphTracerMessages () =default;
		explicit GlyphTracerMessages (bool sfmsg, bool autonl) : _sfmsg(sfmsg), _autonl(autonl) {}

		~GlyphTracerMessages () override {
			if (_autonl)
				Message::mstream() << '\n';
		}

		void beginChar (uint8_t c) override {
			if (!_traced) {
				if (!_fname.empty()) {
					Message::mstream() << '\n';
					// extract font name from file path
					std::string fontname = _fname;
					size_t pos;
					if ((pos = fontname.rfind('/')) != std::string::npos)
						fontname = fontname.substr(pos+1);
					if ((pos = fontname.rfind('.')) != std::string::npos)
						fontname = fontname.substr(0, pos);
					Message::mstream(false, Message::MC_STATE)
						<< "tracing glyphs of " << fontname << '\n';
				}
				_traced = true;
			}
		}

		void endChar (uint8_t c) override {
			std::ostringstream oss;
			oss << '[';
			if (isprint(c))
				oss << c;
			else
				oss << '#' << unsigned(c);
			oss << ']';
			Message::mstream(false, Message::MC_TRACING) << oss.str();
		}

		void setFont (const std::string &fname) override {
			if (_sfmsg && fname != _fname) {
				_fname = fname;
				_traced = false;
			}
		}

	private:
		std::string _fname;
		bool _sfmsg=true, _autonl=true;
		bool _traced=false;  ///< true if a glyph of the current font has already been traced?
};

#endif
