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/**
* Copyright (c) 2022, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lnav_md4cpp_hh
#define lnav_md4cpp_hh
#include <map>
#include <string>
#include <unordered_map>
#include "base/intern_string.hh"
#include "base/result.h"
#include "mapbox/variant.hpp"
#include "md4c/md4c.h"
namespace md4cpp {
struct xml_entity {
std::string xe_chars;
};
struct xml_entity_map {
std::map<std::string, xml_entity> xem_entities;
};
struct emoji {
std::string e_shortname;
std::string e_value;
};
struct emoji_map {
std::vector<emoji> em_emojis;
std::unordered_map<std::string, std::reference_wrapper<emoji>>
em_shortname2emoji;
};
class event_handler {
public:
virtual ~event_handler() = default;
struct block_doc {};
struct block_quote {};
struct block_hr {};
struct block_html {};
struct block_p {};
struct block_thead {};
struct block_tbody {};
struct block_tr {};
struct block_th {};
using block = mapbox::util::variant<block_doc,
block_quote,
MD_BLOCK_UL_DETAIL*,
MD_BLOCK_OL_DETAIL*,
MD_BLOCK_LI_DETAIL*,
block_hr,
MD_BLOCK_H_DETAIL*,
MD_BLOCK_CODE_DETAIL*,
block_html,
block_p,
MD_BLOCK_TABLE_DETAIL*,
block_thead,
block_tbody,
block_tr,
block_th,
MD_BLOCK_TD_DETAIL*>;
virtual Result<void, std::string> enter_block(const block& bl) = 0;
virtual Result<void, std::string> leave_block(const block& bl) = 0;
struct span_em {};
struct span_strong {};
struct span_code {};
struct span_del {};
struct span_u {};
using span = mapbox::util::variant<span_em,
span_strong,
MD_SPAN_A_DETAIL*,
MD_SPAN_IMG_DETAIL*,
span_code,
span_del,
span_u>;
virtual Result<void, std::string> enter_span(const span& bl) = 0;
virtual Result<void, std::string> leave_span(const span& bl) = 0;
virtual Result<void, std::string> text(MD_TEXTTYPE tt,
const string_fragment& sf)
= 0;
};
namespace details {
Result<void, std::string> parse(const string_fragment& sf, event_handler& eh);
}
template<typename T>
class typed_event_handler : public event_handler {
public:
virtual T get_result() = 0;
};
template<typename T>
Result<T, std::string>
parse(const string_fragment& sf, typed_event_handler<T>& eh)
{
TRY(details::parse(sf, eh));
return Ok(eh.get_result());
}
const xml_entity_map& get_xml_entity_map();
const emoji_map& get_emoji_map();
} // namespace md4cpp
#endif
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