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-- Copyright 2025 Matěj Cepl (@mcepl everywhere). See LICENSE.
-- Copyright 2012 joten
-- Org agenda LPeg lexer.
local lexer = lexer
local word_match = lexer.word_match
local P, R, S, V = lpeg.P, lpeg.R, lpeg.S, lpeg.V
local lex = lexer.new(...)
--[[Overview. Used examples.
* Heading 1-5 (8)
TODO special color, bold
DONE special color, bold
[#priority]
:tag: bold
<date> / [date] like heading 3, underlined
keywords: CLOSED: DEADLINE: SCHEDULED: like heading 3, not underlined
| table | like heading 1
[[link][description] ]
formatting:
*bold*
/italic/
_underline_
+strike+
--]]
-- Font formats.
lex:add_rule('bold', lex:tag('BOLD', '*' * lexer.word * '*'))
lex:add_rule('italic', lex:tag('ITALIC', '/' * lexer.word * '/'))
lex:add_rule('underline', lex:tag('UNDERLINE', '_' * lexer.alnum * '_'))
-- ToDos.
lex:add_rule('todo', lex:tag('TODO', lex:word_match('TODO')))
lex:add_rule('done', lex:tag('DONE', lex:word_match('DONE')))
lex:add_rule('wontfix', lex:tag('WONTFIX', lex:word_match('WONTFIX')))
-- DateTime.
local DD = lexer.digit * lexer.digit
local time_range = (' ' * DD * ':' * DD)^0 * ('-' * DD * ':' * DD)^0
local repeater = (' +' * lexer.integer * S('dwmy'))^0
local alarm = (' -' * lexer.integer * S('dwmy'))^0
local pattern_datetime1 = S('<[')^-1 * 'date' * 'wday' * time_range * repeater * alarm * S('>]')^-1
local pattern_datetime2 = lexer.starts_line('weekday') * lexer.space^1 * DD * '. ' * 'month' *
lexer.space^1 * DD * DD
local datetime = pattern_datetime1 + pattern_datetime2
lex:add_rule('current_date', lex:tag('CURRENT_DATE',
lexer.starts_line(lex:word_match('weekday')) * lexer.space^1 * DD * '. ' * lex:word_match('month') *
lexer.space^1 * DD * DD * '|'))
lex:add_rule('time', lex:tag(lexer.CLASS, DD * ':' * DD))
lex:add_rule('week', lex:tag('UNDERLINE', lexer.starts_line('KW ' * DD * lexer.space^25) +
lexer.starts_line('Wk ' * DD * lexer.space^25)))
lex:add_rule('datetime', lex:tag(lexer.NUMBER, lex:word_match('datetime')))
-- Heading patterns.
local function h(n)
return lex:tag(string.format('%s.h%s', lexer.HEADING, n),
lexer.starts_line(P(string.rep('*', n)) * ' '))
end
lex:add_rule('header', h(6) + h(5) + h(4) + h(3) + h(2) + h(1))
-- Links.
local orgmode_link = '[[' * (lexer.nonnewline - ' ' - ']')^1 * ']' *
('[' * (lexer.nonnewline - ']')^1 * ']')^0 * ']'
lex:add_rule('link', lex:tag(lexer.LINK, orgmode_link))
-- Strings.
lex:add_rule('string', lex:tag(lexer.STRING, P('L')^-1 * lexer.range('"')))
-- Comments.
local line_comment = lexer.starts_line(lexer.to_eol('# '))
local block_comment = lexer.range(lexer.starts_line('#+BEGIN_COMMENT'),
lexer.starts_line('#+END_COMMENT'))
lex:add_rule('comment', lex:tag(lexer.COMMENT, block_comment + line_comment))
-- Word lists.
lex:set_word_list('TODO', {'TODO', 'DELEGATED', 'WAITING'})
lex:set_word_list('DONE', {'DONE'})
lex:set_word_list('WONTFIX', {'WONTFIX', 'INVALID'})
lex:set_word_list('wday', {
'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun', 'Po',
'Út', 'St', 'Čt', 'Pá', 'So', 'Ne'
})
lex:set_word_list('weekday', {
'Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag', 'Samstag', 'Sonntag', 'Monday',
'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', 'Pondělí', 'Úterý',
'Středa', 'Čtvrtek', 'Pátek', 'Sobota', 'Neděle'
})
lex:set_word_list('month', {
'Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober',
'November', 'Dezember', 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August',
'September', 'October', 'November', 'December', 'Leden', 'Únor', 'Březen', 'Duben', 'Květen',
'Červen', 'Červenec', 'Srpen', 'Září', 'Říjen', 'Listopad', 'Prosince'
})
lexer.property['scintillua.comment'] = '#'
return lex
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