59 lines
2.5 KiB
Lua
59 lines
2.5 KiB
Lua
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-- Copyright 2006-2019 Mitchell mitchell.att.foicica.com. See License.txt.
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-- MediaWiki LPeg lexer.
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-- Contributed by Alexander Misel.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S, B = lpeg.P, lpeg.R, lpeg.S, lpeg.B
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local lex = lexer.new('mediawiki')
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '<!--' * (lexer.any - '-->')^0 *
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P('-->')^-1))
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-- HTML-like tags
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local tag_start = token('tag_start', '<' * P('/')^-1 * lexer.alnum^1 *
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lexer.space^0)
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local tag_attr = token('tag_attr', lexer.alpha^1 * lexer.space^0 *
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('=' * lexer.space^0 *
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('"' * ((lexer.any - S('>"\\')) +
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('\\' * lexer.any))^0 * '"' +
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(lexer.any - lexer.space - '>')^0)^-1)^0 *
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lexer.space^0)
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local tag_end = token('tag_end', P('/')^-1 * '>')
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lex:add_rule('tag', tag_start * tag_attr^0 * tag_end)
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lex:add_style('tag_start', lexer.STYLE_KEYWORD)
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lex:add_style('tag_attr', lexer.STYLE_TYPE)
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lex:add_style('tag_end', lexer.STYLE_KEYWORD)
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-- Link
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lex:add_rule('link', token(lexer.STRING, S('[]')))
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lex:add_rule('internal_link', B('[[') *
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token('link_article', (lexer.any - '|' - ']]')^1))
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lex:add_style('link_article', lexer.STYLE_STRING..',underlined')
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-- Templates and parser functions.
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lex:add_rule('template', token(lexer.OPERATOR, S('{}')))
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lex:add_rule('parser_func', B('{{') *
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token('parser_func', P('#') * lexer.alpha^1 +
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lexer.upper^1 * ':'))
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lex:add_rule('template_name', B('{{') *
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token('template_name', (lexer.any - S('{}|'))^1))
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lex:add_style('parser_func', lexer.STYLE_FUNCTION)
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lex:add_style('template_name', lexer.STYLE_OPERATOR..',underlined')
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-- Operators.
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lex:add_rule('operator', token(lexer.OPERATOR, S('-=|#~!')))
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-- Behavior switches
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local start_pat = P(function(_, pos) return pos == 1 end)
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lex:add_rule('behavior_switch', (B(lexer.space) + start_pat) *
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token('behavior_switch',
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'__' * (P('TOC') + 'FORCETOC' + 'NOTOC' +
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'NOEDITSECTION' + 'NOCC' +
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'NOINDEX') * '__') * #lexer.space)
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lex:add_style('behavior_switch', lexer.STYLE_KEYWORD)
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return lex
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