mirror of
https://github.com/richgel999/ufo_data.git
synced 2024-12-24 23:19:30 -05:00
391 lines
10 KiB
C++
391 lines
10 KiB
C++
// Copyright (C) 2023 Richard Geldreich, Jr.
|
|
// markdown_proc.h
|
|
#pragma once
|
|
|
|
#include "utils.h"
|
|
|
|
#include "libsoldout/markdown.h"
|
|
|
|
struct markdown
|
|
{
|
|
enum
|
|
{
|
|
cCodeSig = 0xFE,
|
|
|
|
cCodeLink = 1,
|
|
cCodeEmphasis,
|
|
cCodeText,
|
|
cCodeParagraph,
|
|
cCodeLinebreak,
|
|
cCodeHTML
|
|
};
|
|
|
|
static void bufappend(struct buf* out, struct buf* in)
|
|
{
|
|
assert(in != out);
|
|
|
|
if (in && in->size)
|
|
bufput(out, in->data, in->size);
|
|
}
|
|
|
|
static void writelen(struct buf* ob, uint32_t size)
|
|
{
|
|
bufputc(ob, (uint8_t)(size & 0xFF));
|
|
bufputc(ob, (uint8_t)((size >> 8) & 0xFF));
|
|
bufputc(ob, (uint8_t)((size >> 16) & 0xFF));
|
|
bufputc(ob, (uint8_t)((size >> 24) & 0xFF));
|
|
}
|
|
|
|
static std::string get_string(const std::string& buf, uint32_t& cur_ofs, uint32_t text_size)
|
|
{
|
|
std::string text;
|
|
if (cur_ofs + text_size > buf.size())
|
|
panic("Buffer too small");
|
|
|
|
text.append(buf.c_str() + cur_ofs, text_size);
|
|
cur_ofs += text_size;
|
|
|
|
return text;
|
|
}
|
|
|
|
static uint32_t get_len32(const std::string& buf, uint32_t& ofs)
|
|
{
|
|
if ((ofs + 4) > buf.size())
|
|
panic("Buffer too small");
|
|
|
|
uint32_t l = (uint8_t)buf[ofs] |
|
|
(((uint8_t)buf[ofs + 1]) << 8) |
|
|
(((uint8_t)buf[ofs + 2]) << 16) |
|
|
(((uint8_t)buf[ofs + 3]) << 24);
|
|
|
|
ofs += 4;
|
|
|
|
return l;
|
|
}
|
|
|
|
static void prolog(struct buf* ob, void* opaque)
|
|
{
|
|
}
|
|
|
|
static void epilog(struct buf* ob, void* opaque)
|
|
{
|
|
}
|
|
|
|
/* block level callbacks - NULL skips the block */
|
|
static void blockcode(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "blockcode: \"%.*s\" ", (int)text->size, text->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void blockquote(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "blockquote: \"%.*s\" ", (int)text->size, text->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void blockhtml(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "blockhtml: \"%.*s\" ", (int)text->size, text->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void header(struct buf* ob, struct buf* text, int level, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "header: %i \"%.*s\" ", level, (int)text->size, text->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void hrule(struct buf* ob, void* opaque)
|
|
{
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void list(struct buf* ob, struct buf* text, int flags, void* opaque)
|
|
{
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void listitem(struct buf* ob, struct buf* text, int flags, void* opaque)
|
|
{
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void paragraph(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "paragraph: \"%.*s\" ", (int)text->size, text->data);
|
|
#endif
|
|
if (!text || !text->size)
|
|
return;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeParagraph);
|
|
writelen(ob, (uint32_t)text->size);
|
|
bufappend(ob, text);
|
|
}
|
|
|
|
static void table(struct buf* ob, struct buf* head_row, struct buf* rows, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "table: \"%.*s\" \"%.*s\" ", (int)head_row->size, head_row->data, (int)rows->size, rows->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void table_cell(struct buf* ob, struct buf* text, int flags, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "table_cell: \"%.*s\" %i ", (int)text->size, text->data, flags);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static void table_row(struct buf* ob, struct buf* cells, int flags, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "table_row: \"%.*s\" %i ", (int)cells->size, cells->data, flags);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
}
|
|
|
|
static int autolink(struct buf* ob, struct buf* link, enum mkd_autolink type, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "autolink: %u \"%.*s\" ", type, (int)link->size, link->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
return 1;
|
|
}
|
|
|
|
static int codespan(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "codespan: \"%.*s\" ", (int)text->size, text->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
return 1;
|
|
}
|
|
|
|
static int double_emphasis(struct buf* ob, struct buf* text, char c, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "double_emphasis: %u ('%c') [%.*s] ", c, c, (int)text->size, text->data);
|
|
#endif
|
|
if (!text || !text->size)
|
|
return 1;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeEmphasis);
|
|
bufputc(ob, c);
|
|
bufputc(ob, 2);
|
|
writelen(ob, (uint32_t)text->size);
|
|
bufappend(ob, text);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int emphasis(struct buf* ob, struct buf* text, char c, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "emphasis: %u ('%c') [%.*s] ", c, c, (int)text->size, text->data);
|
|
#endif
|
|
|
|
if (!text || !text->size)
|
|
return 1;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeEmphasis);
|
|
bufputc(ob, c);
|
|
bufputc(ob, 1);
|
|
writelen(ob, (uint32_t)text->size);
|
|
bufappend(ob, text);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int image(struct buf* ob, struct buf* link, struct buf* title, struct buf* alt, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "image: \"%.*s\" \"%.*s\" \"%.*s\" ",
|
|
(int)link->size, link->data,
|
|
(int)title->size, title->data,
|
|
(int)alt->size, alt->data);
|
|
#endif
|
|
panic("unsupported markdown feature");
|
|
return 1;
|
|
}
|
|
|
|
static int linebreak(struct buf* ob, void* opaque)
|
|
{
|
|
#if 0
|
|
bufprintf(ob, "linebreak ");
|
|
#endif
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeLinebreak);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int link(struct buf* ob, struct buf* link, struct buf* title, struct buf* content, void* opaque)
|
|
{
|
|
#if 0
|
|
printf("link: {%.*s} {%.*s} {%.*s}\n",
|
|
link ? (int)link->size : 0,
|
|
link ? link->data : nullptr,
|
|
title ? (int)title->size : 0,
|
|
title ? title->data : nullptr,
|
|
content ? (int)content->size : 0,
|
|
content ? content->data : nullptr);
|
|
#endif
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeLink);
|
|
writelen(ob, (uint32_t)link->size);
|
|
writelen(ob, (uint32_t)content->size);
|
|
|
|
bufappend(ob, link);
|
|
bufappend(ob, content);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int raw_html_tag(struct buf* ob, struct buf* tag, void* opaque)
|
|
{
|
|
//bufprintf(ob, "raw_html_tag: \"%.*s\" ", (int)tag->size, tag->data);
|
|
|
|
if (!tag || !tag->size)
|
|
return 1;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeHTML);
|
|
writelen(ob, (uint32_t)tag->size);
|
|
bufappend(ob, tag);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int triple_emphasis(struct buf* ob, struct buf* text, char c, void* opaque)
|
|
{
|
|
//bufprintf(ob, "triple_emphasis: %u ('%c') [%.*s] ", c, c, (int)text->size, text->data);
|
|
|
|
if (!text || !text->size)
|
|
return 1;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeEmphasis);
|
|
bufputc(ob, c);
|
|
bufputc(ob, 3);
|
|
writelen(ob, (uint32_t)text->size);
|
|
bufappend(ob, text);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void normal_text(struct buf* ob, struct buf* text, void* opaque)
|
|
{
|
|
if (!text || !text->size)
|
|
return;
|
|
|
|
bufputc(ob, (uint8_t)cCodeSig);
|
|
bufputc(ob, (uint8_t)cCodeText);
|
|
writelen(ob, (uint32_t)text->size);
|
|
for (uint32_t i = 0; i < text->size; i++)
|
|
{
|
|
uint8_t c = text->data[i];
|
|
if (c == '\n')
|
|
bufputc(ob, ' ');
|
|
else if (c != 1)
|
|
{
|
|
assert(c >= 32 || c == '\t');
|
|
bufputc(ob, c);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
const struct mkd_renderer mkd_parse =
|
|
{
|
|
markdown::prolog,
|
|
markdown::epilog,
|
|
|
|
markdown::blockcode,
|
|
markdown::blockquote,
|
|
markdown::blockhtml,
|
|
markdown::header,
|
|
markdown::hrule,
|
|
markdown::list,
|
|
markdown::listitem,
|
|
markdown::paragraph,
|
|
markdown::table,
|
|
markdown::table_cell,
|
|
markdown::table_row,
|
|
|
|
markdown::autolink,
|
|
markdown::codespan,
|
|
markdown::double_emphasis,
|
|
markdown::emphasis,
|
|
markdown::image,
|
|
markdown::linebreak,
|
|
markdown::link,
|
|
markdown::raw_html_tag,
|
|
markdown::triple_emphasis,
|
|
|
|
//markdown::entity,
|
|
nullptr,
|
|
markdown::normal_text,
|
|
|
|
64,
|
|
"*_",
|
|
nullptr
|
|
};
|
|
|
|
class markdown_text_processor
|
|
{
|
|
public:
|
|
struct detail
|
|
{
|
|
detail() : m_link_index(-1), m_emphasis(0), m_emphasis_amount(0), m_linebreak(false), m_end_paragraph(false) { }
|
|
|
|
string_vec m_html;
|
|
|
|
int m_link_index;
|
|
|
|
char m_emphasis;
|
|
uint8_t m_emphasis_amount;
|
|
bool m_linebreak;
|
|
bool m_end_paragraph;
|
|
};
|
|
|
|
std::string m_text;
|
|
std::vector<detail> m_details;
|
|
string_vec m_links;
|
|
|
|
markdown_text_processor();
|
|
|
|
void clear();
|
|
|
|
void fix_redirect_urls();
|
|
void init_from_markdown(const char* pText);
|
|
bool split_in_half(uint32_t ofs, markdown_text_processor& a, markdown_text_processor& b) const;
|
|
uint32_t count_char_in_text(uint8_t c) const;
|
|
bool split_last_parens(markdown_text_processor& a, markdown_text_processor& b) const;
|
|
void convert_to_plain(std::string& out, bool trim_end) const;
|
|
void convert_to_markdown(std::string& out, bool trim_end) const;
|
|
|
|
private:
|
|
void ensure_detail_ofs(uint32_t ofs);
|
|
void init_from_codes(const std::string& buf);
|
|
void parse_block(const std::string& buf);
|
|
void handle_html(std::string& out, uint32_t text_ofs) const;
|
|
void handle_emphasis(std::string& out, uint32_t text_ofs, int& emphasis, int& emphasis_amount) const;
|
|
};
|