New highlighter for Ruby's ERB and HTML embedded ERB

Ruby code inside ERB tags (whether in plain or HTML environment) is highlighted
via the ruby.jsf colorer.

erb.jsf

@@ -0,0 +1,31 @@
+# JOE syntax highlight file for plain ERB
+
+=Idle
+=Keyword	bold
+=Bad		bold red
+=Brace		magenta
+
+=ERB		yellow
+
+:content Idle
+	*		content
+	"<"		maybe_erb_start
+
+:maybe_erb_start Idle
+	*		content		noeat
+	"%"		maybe_erb_eq	recolor=-2
+
+:maybe_erb_eq ERB
+	*		rtn_ruby	noeat call=ruby.ruby(erb)
+	"="		rtn_ruby	call=ruby.ruby(erb)
+
+:rtn_ruby ERB
+	*		content		noeat
+
+:erb ERB
+	*		erb
+	"%"		maybe_erb_end
+
+:maybe_erb_end ERB
+	*		erb
+	">"		content

ftyperc

@@ -860,3 +860,11 @@
 -syntax whitespace
  --force
  --spaces
+
+ plain ERB
+*.erb
+-syntax erb
+
+ .html.erb
+*.html.erb
+-syntax htmlerb

html.jsf

@@ -81,11 +81,18 @@
 .else
 	"?"			xml_pi recolor=-2
 .endif
+.ifdef erb
+	"%"			maybe_erb_eq
+.endif
 
 # this state allows php and perl to recolor the ?> %> or &> properly.
 :rtn_php TagEdge
 	*			idle noeat
 
+:maybe_erb_eq TagEdge
+	*			rtn_php noeat call=ruby.ruby(erb)
+	"="			rtn_php call=ruby.ruby(erb)
+
 :tag_name_first Mystery
 	*			tag_idle noeat
 	"-A-Za-z0-9._:"		tag_name recolor=-1

htmlerb.jsf

@@ -0,0 +1,11 @@
+# JOE syntax highlight file for HTML embedded ERB
+
+=Idle
+=Keyword	bold
+=Bad		bold red
+=Brace		magenta
+
+=ERB		yellow
+
+:begin Idle
+	*	NULL		noeat call=html.html(erb)

ruby.jsf

@@ -27,11 +27,13 @@
 # Detect pod
 
 :idle Idle
-	*		rest		noeat
+	*		NULL		noeat call=.ruby()
 	"="		pod_start
 
 # Rest of line
 
+.subr ruby
+
 :rest Idle
 	*		rest
 	"#"		line_comment	recolor=-1
@@ -59,7 +61,16 @@
 :after_term Idle
 	*		rest		noeat
 	" \t)"		after_term
+.ifdef erb
+	"/"		rest
+	"%"		after_term_erb_end
+.else
 	"/%"		rest
+.endif
+
+:after_term_erb_end Idle
+	*		rest		noeat
+	">"		NULL		recolor=-2 return
 
 :pod_start Idle
 	*		pod_start
@@ -430,6 +441,9 @@ done
 	*		match		noeat
 	" \t"		after_term	noeat
 	"xrqQw"		match
+.ifdef erb
+	">"		NULL		recolor=-2 return
+.endif
 
 :match Idle
 	*		inmatch		save_c recolor=-1
@@ -539,6 +553,8 @@ done
 	*		rest		noeat
 	"a-zA-Z0-9_"	global_var
 
+.end
+
 .subr comment_todo
 # initial state
 :comment_todo_init Comment