-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
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-- Gtkrc LPeg lexer.
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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 = lpeg.P, lpeg.R, lpeg.S
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local lex = lexer.new('gtkrc')
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Keywords.
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lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
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binding class include module_path pixmap_path im_module_file style widget
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widget_class
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]]))
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-- Variables.
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lex:add_rule('variable', token(lexer.VARIABLE, word_match[[
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bg fg base text xthickness ythickness bg_pixmap font fontset font_name stock
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color engine
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]]))
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-- States.
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lex:add_rule('state', token('state', word_match[[
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ACTIVE SELECTED NORMAL PRELIGHT INSENSITIVE TRUE FALSE
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]]))
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lex:add_style('state', lexer.STYLE_CONSTANT)
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-- Functions.
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lex:add_rule('function', token(lexer.FUNCTION, word_match[[
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mix shade lighter darker
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]]))
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-- Identifiers.
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lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.alpha *
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(lexer.alnum + S('_-'))^0))
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-- Strings.
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lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
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lexer.delimited_range('"', true)))
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '#' * lexer.nonnewline^0))
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-- Numbers.
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lex:add_rule('number', token(lexer.NUMBER, lexer.digit^1 *
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('.' * lexer.digit^1)^-1))
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-- Operators.
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lex:add_rule('operator', token(lexer.OPERATOR, S(':=,*()[]{}')))
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-- Fold points.
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lex:add_fold_point(lexer.OPERATOR, '{', '}')
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lex:add_fold_point(lexer.COMMENT, '#', lexer.fold_line_comments('#'))
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return lex
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