Added optional Lua lexer support.

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

1 files changed, 20 insertions, 0 deletions

diff --git a/lexlua/rhtml.lua b/lexlua/rhtml.lua
new file mode 100644
index 000000000..ff76f2479
--- /dev/null
+++ b/lexlua/rhtml.lua
@@ -0,0 +1,20 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- RHTML 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('rhtml', {inherit = lexer.load('html')})
+
+-- Embedded Ruby.
+local ruby = lexer.load('rails')
+local ruby_start_rule = token('rhtml_tag', '<%' * P('=')^-1)
+local ruby_end_rule = token('rhtml_tag', '%>')
+lex:embed(ruby, ruby_start_rule, ruby_end_rule)
+lex:add_style('rhtml_tag', lexer.STYLE_EMBEDDED)
+
+-- Fold points.
+lex:add_fold_point('rhtml_tag', '<%', '%>')
+
+return lex