Ok here's an updated patch. Please let me know if there's anything else.
On Sun, Jun 30, 2024 at 4:30 AM Rudolf Adamkovič <rud...@adamkovic.org>
wrote:
> Nathan Nichols <nathannichols...@gmail.com> writes:
>
> > +(defun org-html-normalize-str-or-fn (input &rest args)
>
> How about
>
> org-html-normalize-string-or-function
>
> instead of
>
> org-html-normalize-str-or-fn
>
> to match
>
> org-element-normalize-string
>
> and make searching easier?
>
> Rudy
> --
> "Great minds discuss ideas; average minds discuss events; small minds
> discuss people." --- Anna Eleanor Roosevelt (1884-1962)
>
> Rudolf Adamkovič <rud...@adamkovic.org> [he/him]
> http://adamkovic.org
>
From 153ee0e8ff2a0b17fa7d928af66a608dac18d31b Mon Sep 17 00:00:00 2001
From: Nate Nichols <nathannichols...@gmail.com>
Date: Thu, 20 Jun 2024 14:25:35 -0400
Subject: [PATCH] Added ability to specify :html-head as a string or function
---
etc/ORG-NEWS | 6 ++++++
lisp/ox-html.el | 29 ++++++++++++++++++++++-------
testing/lisp/test-ox-html.el | 8 ++++++++
3 files changed, 36 insertions(+), 7 deletions(-)
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index b9f51667d..59aceea02 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -92,7 +92,13 @@ This results in an error such as:
Runtime error near line 2: attempt to write a readonly database (8)
[ Babel evaluation exited with code 1 ]
#+end_example
+*** ~org-html-head~ and ~org-html-head-extra~ can now be specified as functions
+Previously, ~org-html-head~ and ~org-html-head-extra~ could only be
+specified directly as strings. Now, they can be set to functions that
+accept the project p-list and return a string. This makes it possible
+to dynamically generate the content of the resulting ~<head>~ tag in
+the resulting HTML document.
** Miscellaneous
*** Trailing =-= is now allowed in plain links
diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index d1687cf5a..304671f7e 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -1531,7 +1531,8 @@ style information."
This variable can contain the full HTML structure to provide a
style, including the surrounding HTML tags. You can consider
including definitions for the following classes: title, todo,
-done, timestamp, timestamp-kwd, tag, target.
+done, timestamp, timestamp-kwd, tag, target. Can be a string, or
+a function that accepts the project p-list and returns a string.
For example, a valid value would be:
@@ -1556,19 +1557,23 @@ or for publication projects using the :html-head property."
:group 'org-export-html
:version "24.4"
:package-version '(Org . "8.0")
- :type 'string)
+ :type '(choice (string :tag "Literal text to insert")
+ (function :tag "Function evaluating to a string")))
;;;###autoload
(put 'org-html-head 'safe-local-variable 'stringp)
(defcustom org-html-head-extra ""
"More head information to add in the HTML output.
-You can set this on a per-file basis using #+HTML_HEAD_EXTRA:,
-or for publication projects using the :html-head-extra property."
+You can set this on a per-file basis using #+HTML_HEAD_EXTRA:, or
+for publication projects using the :html-head-extra property.
+Can be a string, or a function that accepts the project p-list
+and returns a string."
:group 'org-export-html
:version "24.4"
:package-version '(Org . "8.0")
- :type 'string)
+ :type '(choice (string :tag "Literal text to insert")
+ (function :tag "Function evaluating to a string")))
;;;###autoload
(put 'org-html-head-extra 'safe-local-variable 'stringp)
@@ -2001,6 +2006,15 @@ INFO is a plist used as a communication channel."
org-html-meta-tags))
""))))
+(defun org-html-normalize-string-or-function (input &rest args)
+ "Normalize INPUT function or string. Return a string or nil.
+If INPUT is a string, it is passed to
+`org-element-normalize-string'. If INPUT is a function, it is
+applied to arguments ARGS, and the result is passed to
+`org-element-normalize-string'."
+ (let ((s (if (functionp input) (format "%s" (apply input args)) input)))
+ (org-element-normalize-string s)))
+
(defun org-html--build-head (info)
"Return information for the <head>..</head> of the HTML output.
INFO is a plist used as a communication channel."
@@ -2008,8 +2022,9 @@ INFO is a plist used as a communication channel."
(concat
(when (plist-get info :html-head-include-default-style)
(org-element-normalize-string org-html-style-default))
- (org-element-normalize-string (plist-get info :html-head))
- (org-element-normalize-string (plist-get info :html-head-extra))
+ (org-html-normalize-string-or-function (plist-get info :html-head) info)
+ (org-html-normalize-string-or-function (plist-get info :html-head-extra)
+ info)
(when (and (plist-get info :html-htmlized-css-url)
(eq org-html-htmlize-output-type 'css))
(org-html-close-tag "link"
diff --git a/testing/lisp/test-ox-html.el b/testing/lisp/test-ox-html.el
index 0959d1441..af3007392 100644
--- a/testing/lisp/test-ox-html.el
+++ b/testing/lisp/test-ox-html.el
@@ -996,5 +996,13 @@ entirely."
(should (= 0 (how-many "Created: ")))
(should (= 1 (how-many "Author=Monsieur Oeuf")))))))
+(ert-deftest ox-html/test-normalize-string-or-function ()
+ ;; Test cases for `org-element-normalize-string-or-function'
+ (should (string= (org-html-normalize-string-or-function
+ (lambda (_res) "abcdefg") nil) "abcdefg\n"))
+ (should (string= (org-html-normalize-string-or-function "abcdefg")
+ "abcdefg\n"))
+ (should (= (org-element-normalize-string-or-function 123 nil) 123)))
+
(provide 'test-ox-html)
;;; test-ox-html.el ends here
--
2.34.1
