From e7d4f74e5fd9bca75906c7b2c2e68695a09cbd78 Mon Sep 17 00:00:00 2001
From: Oleh Krehel <address@hidden>
Date: Thu, 18 Dec 2014 13:19:32 +0100
Subject: [PATCH] Add indentation for \if...-\else-\fi statements

* latex.el (LaTeX-end-regexp): "\else" and "\fi" will now
subtract from indentation.
(LaTeX-indent-level-count): add a special case for "\else", since it
ends an indentation block and starts a new one at the same time.  "\if"
will now add to indentation level, unless there's a "{" on the same
line.

Note that there's no "\\b", so:

  \ifdefinded will add indentation
  \ifwindows will add indentation
  \ifstrequal{#4}{} will not add indentation
---
 latex.el | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/latex.el b/latex.el
index 477ef66..e2d1f68 100644
--- a/latex.el
+++ b/latex.el
@@ -2917,7 +2917,7 @@ indentation level in columns."
   :group 'LaTeX-indentation
   :type 'regexp)
 
-(defcustom LaTeX-end-regexp "end\\b"
+(defcustom LaTeX-end-regexp "\\(?:end\\|else\\|fi\\)\\b"
   "*Regexp matching macros considered ends."
   :group 'LaTeX-indentation
   :type 'regexp)
@@ -3129,7 +3129,13 @@ outer indentation in case of a commented line.  The symbols
 	   ((looking-at "right\\b")
 	    (setq count (- count LaTeX-left-right-indent-level)))
 	   ((looking-at LaTeX-begin-regexp)
-	    (setq count (+ count LaTeX-indent-level)))
+            (setq count (+ count LaTeX-indent-level)))
+           ((and (looking-at "if")
+                 (not
+                  (save-excursion
+                    (search-forward "{" (line-end-position) t))))
+            (setq count (+ count LaTeX-indent-level)))
+           ((looking-at "else\\b"))
 	   ((looking-at LaTeX-end-regexp)
 	    (setq count (- count LaTeX-indent-level)))
 	   ((looking-at (regexp-quote TeX-esc))
-- 
1.8.4