Ok, here's a patch. Please let me know if this is acceptable or not.
On Sat, Jun 22, 2024 at 8:33 AM Ihor Radchenko <yanta...@posteo.net> wrote:
> Nathan Nichols <nathannichols...@gmail.com> writes:
>
> >> This looks like a copy-paste of `org-element-normalize-string'.
> >> Why not simply calling `org-element-normalize-string'?
> >
> > I changed it at one point, but then changed it back and didn't realize
> that
> > it was ultimately unchanged.
> > Here's a patch that uses `org-element-normalize-string` instead.
>
> Thanks!
>
> > +(defun org-html-normalize-str-or-fn (input &rest trailing)
> > + "If INPUT is a string, it is passed to `org-element-normalize-string'.
>
> Ideally, the first line of the docstring should fully describe what
> function does.
>
> Maybe you can add something like
>
> Normalize INPUT function or string. Return a string or nil.
>
> > +If INPUT is a function, it is applied to arguments TRAILING, and the
> result is
> > +passed to `org-element-normalize-string'."
> > + (let ((s (if (functionp input) (format "%s" (apply input trailing))
> input)))
> > + (org-element-normalize-str s)))
> ^org-element-normalize-string
>
> TRAILING name is confusing because it is not what one expects to be a
> name of function arguments. Maybe
>
> (defun org-html-normalize-str-or-fn (input &rest args)
>
>
> Also, you need to update docstrings and type definitions for
> `org-html-head' and `org-html-head-extra', update the Org manual, and
> announce the new allowed values in etc/ORG-NEWS.
>
> --
> Ihor Radchenko // yantar92,
> Org mode contributor,
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/yantar92>
>
From 3b3ad45f506c3446fda0d7702913f1badfd20d46 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 | 28 +++++++++++++++++++++-------
testing/lisp/test-ox-html.el | 6 ++++++
3 files changed, 33 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..6119bc82a 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-str-or-fn (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 +2022,8 @@ 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-str-or-fn (plist-get info :html-head) info)
+ (org-html-normalize-str-or-fn (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..d079cd271 100644
--- a/testing/lisp/test-ox-html.el
+++ b/testing/lisp/test-ox-html.el
@@ -996,5 +996,11 @@ entirely."
(should (= 0 (how-many "Created: ")))
(should (= 1 (how-many "Author=Monsieur Oeuf")))))))
+(ert-deftest ox-html/test-normalize-str-or-fn ()
+ ;; Test cases for `org-element-normalize-str-or-fn'
+ (should (string= (org-html-normalize-str-or-fn (lambda (_res) "abcdefg") nil) "abcdefg\n"))
+ (should (string= (org-html-normalize-str-or-fn "abcdefg") "abcdefg\n"))
+ (should (= (org-element-normalize-str-or-fn 123 nil) 123)))
+
(provide 'test-ox-html)
;;; test-ox-html.el ends here
--
2.34.1
