.config/vis: update personal markdown lexer fork
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6bdbaea817
commit
517bc58b8f
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@ -1,5 +1,5 @@
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-- Adapted from Markdown LPeg lexer by Mitchell.
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-- See <https://git.sr.ht/~martanne/vis>.
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-- Adapted from Markdown LPeg lexer by Mitchell to simplify and lex some pandoc
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-- specifics.
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local lexer = lexer
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local P, S, B = lpeg.P, lpeg.S, lpeg.B
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@ -14,81 +14,69 @@ local bl = nl * nl
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local nws = lexer.any - lexer.space
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-- Heading.
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lex:add_rule('heading_delimiter',
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lex:tag('delimiter' .. md,
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lexer.starts_line(P('#')^-6 * P(' '))))
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lex:add_rule('heading',
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lex:tag(lexer.HEADING .. md,
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(
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B(bl * P('# ')) +
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B(bl * P('## ')) +
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B(bl * P('### ')) +
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B(bl * P('#### ')) +
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B(bl * P('##### ')) +
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B(bl * P('###### '))
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) *
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lexer.to_eol(nws) *
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lex:tag(lexer.COMMENT, lexer.starts_line(P('#')^-6)) *
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P(' ') *
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lex:tag(lexer.HEADING, lexer.to_eol(nws) *
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#bl))
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-- Blockquote.
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lex:add_rule('blockquote_delimiter',
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lex:tag('delimiter' .. md,
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lex:add_rule('blockquote',
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lex:tag(lexer.COMMENT,
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lexer.starts_line(P('> ')^1)))
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-- Horizontal rule.
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lex:add_rule('hr',
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lex:tag('hr' .. md, B(bl) * S('*-_')^3 * #bl))
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lex:tag(lexer.COMMENT, B(bl) * S('*-_')^3 * #bl))
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-- Native divs.
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lex:add_rule("native_div_delimiter",
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lex:tag('delimiter' .. md,
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lexer.starts_line(lexer.to_eol(':::'))))
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-- Native div.
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lex:add_rule("native_div",
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lex:tag(lexer.COMMENT, lexer.starts_line(lexer.to_eol(P(':')^3))))
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-- Code block.
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local code_line = lexer.starts_line(
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(B(' ') + B('\t')) * lexer.to_eol(), true)
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local code_block = lexer.range(lexer.starts_line('```', true), lexer.starts_line(P('```'))) + lexer.range(lexer.starts_line('~~~', true), lexer.starts_line(P('~~~')))
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local code_inline = lpeg.Cmt(
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lpeg.C(P('`')^1), function(input, index, bt)
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local code_block = lexer.range(lexer.starts_line('```', true), lexer.starts_line(P('```'))) +
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lexer.range(lexer.starts_line('~~~', true), lexer.starts_line(P('~~~')))
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local code_inline = lpeg.Cmt(lpeg.C(P('`')^1), function(input, index, bt)
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local _, e = input:find('[^`]' .. bt .. '%f[^`]', index)
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return (e or #input) + 1
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end)
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lex:add_rule('block_code', lex:tag(lexer.CODE .. md, code_line + code_block))
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lex:add_rule('block_code', lex:tag(lexer.CODE, code_line + code_block))
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-- Escape.
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lex:add_rule('escape', lex:tag(lexer.DEFAULT, P('\\') * 1))
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-- Bracket.
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lex:add_rule('brackets',
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lex:tag('delimiter' .. md, S('[]')))
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lex:tag(lexer.COMMENT, S('[]')))
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-- Native span.
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lex:add_rule('native_span',
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B(']') * lex:tag(lexer.COMMENT, lexer.range('{', '}')))
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-- Footnote.
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lex:add_rule('footnote_key',
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lex:tag(lexer.REFERENCE .. md,
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(P('^') * #P('[')) +
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(B('[') * P('^') * (lexer.any - lexer.space - S('^[]'))^1 * #P(']'))))
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lex:tag(lexer.REFERENCE, P('^')) * #P('[') +
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B('[') * lex:tag(lexer.REFERENCE, P('^') * (lexer.any - lexer.space - S('^[]'))^1) * #P(']'))
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-- @todo footnote reference
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-- Cite.
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lex:add_rule('cite_key',
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lex:tag(lexer.REFERENCE .. md,
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B(lexer.space + P('[')) * P('-')^-1 * P('@') * (lexer.alnum + P('_')) * (lexer.alnum + S(':.#$%&-+?<>~/'))^0 +
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B(lexer.space + P('[')) * P('-')^-1 * P('@') * lexer.range('{', '}')))
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B(lexer.space + P('[')) * lex:tag(lexer.REFERENCE,
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P('-')^-1 *
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(P('@') * (lexer.alnum + P('_')) * (lexer.alnum + S(':.#$%&-+?<>~/'))^0 +
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P('@') * lexer.range('{', '}'))))
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-- Link.
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lex:add_rule('link_text',
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lex:tag(lexer.LINK .. md,
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B('[') * (lexer.any - P(']'))^1 * #P(P(']') * lexer.range('(', ')'))))
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B('[') * lex:tag(lexer.LINK, (lexer.any - P(']'))^1) * #P(']' * lexer.range('(', ')')))
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lex:add_rule('link_target',
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lex:tag('delimiter' .. md, B(']') * lexer.range('(', ')')))
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lex:add_rule('link_ref',
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lex:tag('delimiter' .. md, B(']') * P(':') * #lexer.space))
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B(']') * lex:tag(lexer.COMMENT, lexer.range('(', ')')))
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-- @todo link reference
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-- Image
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lex:add_rule('image_bang', lex:tag(lexer.REFERENCE .. md, P('!') * #P('[')))
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-- Attribute.
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lex:add_rule('attribute',
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lex:tag('delimiter' .. md, B(S('])')) * lexer.range('{', '}')))
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lex:add_rule('image_bang', lex:tag(lexer.REFERENCE, P('!')) * #P('['))
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local punct_space = lexer.punct + lexer.space
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@ -121,8 +109,8 @@ lex:embed(html, html_start_rule, html_end_rule)
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-- Embedded YAML.
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local yaml = lexer.load('yaml')
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local yaml_start_rule = #lexer.starts_line(P('---'), false) * yaml:get_rule('doc_bounds')
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local yaml_end_rule = #lexer.starts_line(P('...'), false) * yaml:get_rule('doc_bounds')
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local yaml_start_rule = yaml:get_rule('doc_bounds') - B(bl) * P(P('---') + '...') * #bl
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local yaml_end_rule = yaml:get_rule('doc_bounds') - B(bl) * P(P('---') + '...') * #bl
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lex:embed(yaml, yaml_start_rule, yaml_end_rule)
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return lex
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