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-- Copyright 2006-2017 Mitchell mitchell.att.foicica.com. See LICENSE.
-- Gtkrc LPeg lexer.
local l = require('lexer')
local token, word_match = l.token, l.word_match
local P, R, S = lpeg.P, lpeg.R, lpeg.S
local M = {_NAME = 'gtkrc'}
-- Whitespace.
local ws = token(l.WHITESPACE, l.space^1)
-- Comments.
local comment = token(l.COMMENT, '#' * l.nonnewline^0)
-- Strings.
local sq_str = l.delimited_range("'", true)
local dq_str = l.delimited_range('"', true)
local string = token(l.STRING, sq_str + dq_str)
-- Numbers.
local number = token(l.NUMBER, l.digit^1 * ('.' * l.digit^1)^-1)
-- Keywords.
local keyword = token(l.KEYWORD, word_match{
'binding', 'class', 'include', 'module_path', 'pixmap_path', 'im_module_file',
'style', 'widget', 'widget_class'
})
-- Variables.
local variable = token(l.VARIABLE, word_match{
'bg', 'fg', 'base', 'text', 'xthickness', 'ythickness', 'bg_pixmap', 'font',
'fontset', 'font_name', 'stock', 'color', 'engine'
})
-- States.
local state = token(l.CONSTANT, word_match{
'ACTIVE', 'SELECTED', 'NORMAL', 'PRELIGHT', 'INSENSITIVE', 'TRUE', 'FALSE'
})
-- Functions.
local func = token(l.FUNCTION, word_match{
'mix', 'shade', 'lighter', 'darker'
})
-- Identifiers.
local identifier = token(l.IDENTIFIER, l.alpha * (l.alnum + S('_-'))^0)
-- Operators.
local operator = token(l.OPERATOR, S(':=,*()[]{}'))
M._rules = {
{'whitespace', ws},
{'keyword', keyword},
{'variable', variable},
{'state', state},
{'function', func},
{'identifier', identifier},
{'string', string},
{'comment', comment},
{'number', number},
{'operator', operator},
}
M._foldsymbols = {
_patterns = {'[{}]', '#'},
[l.OPERATOR] = {['{'] = 1, ['}'] = -1},
[l.COMMENT] = {['#'] = l.fold_line_comments('#')}
}
return M
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