From 0d2e239777c96e3b78a138bf3879b8ab9d735166 Mon Sep 17 00:00:00 2001
From: azufluup <talk@azufluup.com>
Date: Wed, 23 May 2018 21:08:59 +0100
Subject: [PATCH] Add electric dedent to lua mode

The lua mode currently adds a level of indentation when opening up a new
scope, but closing the scope doesn't remove a level. This change gives
opening scope indents a respective dedent.
---
 mode/lua/lua.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mode/lua/lua.js b/mode/lua/lua.js
index 0b19abd304..dcfafea1ac 100644
--- a/mode/lua/lua.js
+++ b/mode/lua/lua.js
@@ -64,8 +64,9 @@ CodeMirror.defineMode("lua", function(config, parserConfig) {
                          "while", "repeat", "until", "for", "in", "local" ]);
 
   var indentTokens = wordRE(["function", "if","repeat","do", "\\(", "{"]);
-  var dedentTokens = wordRE(["end", "until", "\\)", "}"]);
-  var dedentPartial = prefixRE(["end", "until", "\\)", "}", "else", "elseif"]);
+  var dedentKeywords = ["end", "until", "\\)", "}", "else", "elseif"];
+  var dedentTokens = wordRE(dedentKeywords);
+  var dedentPartial = prefixRE(dedentKeywords);
 
   function readBracket(stream) {
     var level = 0;
@@ -148,6 +149,7 @@ CodeMirror.defineMode("lua", function(config, parserConfig) {
       return state.basecol + indentUnit * (state.indentDepth - (closing ? 1 : 0));
     },
 
+    electricInput: new RegExp("\\b" + dedentKeywords.join("|") + "\\b", "gi"),
     lineComment: "--",
     blockCommentStart: "--[[",
     blockCommentEnd: "]]"