From a65f2b1d985c73c3b4cd25d7a25e783ae8c810c4 Mon Sep 17 00:00:00 2001
From: Alex Vear <av@axvr.io>
Date: Sat, 15 Feb 2020 20:01:31 +0000
Subject: [PATCH] Allow lower case in option keys and dynamic block markers

For example previously only `#+TITLE: Foo` would have syntax highlighted
`Foo` correctly. Now all case variants will work (e.g. `#+title: Foo`
and `#+tItLE: Foo`).

The same has been done to dynamic block markers so now this will also
work:

    #+begin_src lisp
    (if (< 1 2)
      (print "True!")
      (print "False!))
    #+end_src
---
 syntax/org.vim | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/syntax/org.vim b/syntax/org.vim
index 85268d1..9475d45 100644
--- a/syntax/org.vim
+++ b/syntax/org.vim
@@ -37,7 +37,7 @@ highlight def link orgUnderlineDelimiter orgUnderline
 
 " Options
 syntax match  orgOption /^\s*#+\w\+.*$/ keepend
-syntax region orgTitle matchgroup=orgOption start="^\s*#+TITLE:\s*" end="$" keepend oneline
+syntax region orgTitle matchgroup=orgOption start="\c^\s*#+TITLE:\s*" end="$" keepend oneline
 
 highlight def link orgBlockDelimiter SpecialComment
 highlight def link orgOption SpecialComment
@@ -48,9 +48,9 @@ highlight def link orgTitle Title
 syntax region orgCode     matchgroup=orgCodeDelimiter     start="[^ \t\k]\@<!\~\k\@=\~\@!" end="\k\@<=\~\@<!\~" keepend
 syntax region orgVerbatim matchgroup=orgVerbatimDelimiter start="[^ \t\k]\@<!=\k\@==\@!"   end="\k\@<==\@<!="   keepend
 syntax match  orgVerbatim /^\s*: .*$/ keepend
-syntax region orgVerbatim matchgroup=orgBlockDelimiter start="^\s*#+BEGIN_.*"      end="^\s*#+END_.*"      keepend
-syntax region orgCode     matchgroup=orgBlockDelimiter start="^\s*#+BEGIN_SRC"     end="^\s*#+END_SRC"     keepend
-syntax region orgCode     matchgroup=orgBlockDelimiter start="^\s*#+BEGIN_EXAMPLE" end="^\s*#+END_EXAMPLE" keepend
+syntax region orgVerbatim matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_.*"      end="\c^\s*#+END_.*"      keepend
+syntax region orgCode     matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_SRC"     end="\c^\s*#+END_SRC"     keepend
+syntax region orgCode     matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_EXAMPLE" end="\c^\s*#+END_EXAMPLE" keepend
 
 highlight def link orgVerbatim Identifier
 highlight def link orgVerbatimDelimiter orgVerbatim
@@ -60,7 +60,7 @@ highlight def link orgCodeDelimiter orgCode
 
 " Comments
 syntax match  orgComment /^\s*#\s\+.*$/ keepend
-syntax region orgComment matchgroup=orgBlockDelimiter start="^\s*#+BEGIN_COMMENT" end="^\s*#+END_COMMENT" keepend
+syntax region orgComment matchgroup=orgBlockDelimiter start="\c^\s*#+BEGIN_COMMENT" end="\c^\s*#+END_COMMENT" keepend
 highlight def link orgComment Comment