Added optional Lua lexer support.

This support is disabled by default and must be enabled via compile-time option.

1 files changed, 55 insertions, 0 deletions

diff --git a/lexlua/django.lua b/lexlua/django.lua
new file mode 100644
index 000000000..88406e1f8
--- /dev/null
+++ b/lexlua/django.lua
@@ -0,0 +1,55 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Django LPeg lexer.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('django')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  as block blocktrans by endblock endblocktrans comment endcomment cycle date
+  debug else extends filter endfilter firstof for endfor if endif ifchanged
+  endifchanged ifnotequal endifnotequal in load not now or parsed regroup ssi
+  trans with widthratio
+]]))
+
+-- Functions.
+lex:add_rule('function', token(lexer.FUNCTION, word_match[[
+  add addslashes capfirst center cut date default dictsort dictsortreversed
+  divisibleby escape filesizeformat first fix_ampersands floatformat get_digit
+  join length length_is linebreaks linebreaksbr linenumbers ljust lower
+  make_list phone2numeric pluralize pprint random removetags rjust slice slugify
+  stringformat striptags time timesince title truncatewords unordered_list upper
+  urlencode urlize urlizetrunc wordcount wordwrap yesno
+]]))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING,
+                             lexer.delimited_range('"', false, true)))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S(':,.|')))
+
+-- Embed Django in HTML.
+local html = lexer.load('html')
+local html_comment = '<!--' * (lexer.any - '-->')^0 * P('-->')^-1
+local django_comment = '{#' * (lexer.any - lexer.newline - '#}')^0 * P('#}')^-1
+html:modify_rule('comment', token(lexer.COMMENT, html_comment + django_comment))
+local django_start_rule = token('django_tag', '{' * S('{%'))
+local django_end_rule = token('django_tag', S('%}') * '}')
+html:embed(lex, django_start_rule, django_end_rule)
+lex:add_style('django_tag', lexer.STYLE_EMBEDDED)
+
+-- Fold points.
+lex:add_fold_point('django_tag', '{{', '}}')
+lex:add_fold_point('django_tag', '{%', '%}')
+
+return lex