[PATCH] ox-html.el: Add HTML_CONTENT_CLASS to support css classes in content tag

[Sameer Rahmani <lxsameer@gnu.org>]

* ox-html.el (org-html-template): Added the support for a CSS class name
to the content tag which wraps the entire content. The CSS class name
can be set via in buffer HTML_CONTENT_CLASS property or :html-content-class
for org publish.
---
 lisp/ox-html.el | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index 11757bb35e8c..766897d0a032 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -113,6 +113,7 @@
   :options-alist
   '((:html-doctype "HTML_DOCTYPE" nil org-html-doctype)
     (:html-container "HTML_CONTAINER" nil org-html-container-element)
+    (:html-content-class "HTML_CONTENT_CLASS" nil org-html-content-class)
     (:description "DESCRIPTION" nil nil newline)
     (:keywords "KEYWORDS" nil nil space)
     (:html-html5-fancy nil "html5-fancy" org-html-html5-fancy)
@@ -1084,6 +1085,16 @@ org-info.js for your website."
   :package-version '(Org . "8.0")
   :type 'string)
 
+(defcustom org-html-content-class "content"
+  "CSS class name to use for the top level content wrapper.
+Can be set with the in-buffer HTML_CONTENT_CLASS property or for
+publishing, with :html-content-class."
+  :group 'org-export-html
+  :version "27.1"
+  :package-version '(Org . "9.3.8")
+  :type 'string)
+
+
 (defcustom org-html-divs
   '((preamble  "div" "preamble")
     (content   "div" "content")
@@ -2120,7 +2131,10 @@ holding export options."
    (org-html--build-pre/postamble 'preamble info)
    ;; Document contents.
    (let ((div (assq 'content (plist-get info :html-divs))))
-     (format "<%s id=\"%s\">\n" (nth 1 div) (nth 2 div)))
+     (format "<%s id=\"%s\" class=\"%s\">\n"
+             (nth 1 div)
+             (nth 2 div)
+             (plist-get info :html-content-class)))
    ;; Document title.
    (when (plist-get info :with-title)
      (let ((title (and (plist-get info :with-title)
-- 
2.26.2