MarginFigure environment in LaTeX export

[Louis Gostiaux <louis.gostiaux@free.fr>]

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Hello,

Here is a patch to allow the margin value for float option in figure 
environment.

The marginfigure environment is proposed by the LateX sidenotes package 
and is commonly used in book editions. I needed it to edit with 
EmacsOrgmode a book with the Tufte-book class. I could use this new 
export properly and I now want to propose it to the OrgMode users.

Please tell me if the submission procedure is correct,

Louis Gostiaux.


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From 45f1484c390276fd714ae91ca5dcc489e9b3ef16 Mon Sep 17 00:00:00 2001
From: lgostiau <louis.gostiaux@free.fr>
Date: Fri, 6 Mar 2020 10:50:53 +0100
Subject: [PATCH] Included margin float value for figure environment, to be
 used with LaTeX sidenotes package

---
 lisp/ox-latex.el | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index c0af8157d..4d391c2fa 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -2374,6 +2374,7 @@ used as a communication channel."
 		  (cond ((string= float "wrap") 'wrap)
 			((string= float "sideways") 'sideways)
 			((string= float "multicolumn") 'multicolumn)
+			((string= float "margin") 'margin)
 			((and (plist-member attr :float) (not float)) 'nonfloat)
 			((or float
 			     (org-element-property :caption parent)
@@ -2491,6 +2492,14 @@ used as a communication channel."
 			    (if center "\\centering" "")
 			    comment-include image-code
 			    (if caption-above-p "" caption)))
+	(`margin (format "\\begin{marginfigure}
+%s%s
+%s%s
+%s\\end{marginfigure}"
+			   (if caption-above-p caption "")
+			   (if center "\\centering" "")
+			   comment-include image-code
+			   (if caption-above-p "" caption)))
       (`figure (format "\\begin{figure}%s
 %s%s
 %s%s
-- 
2.17.1