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[FR] Make org-occur highlights always visible, even upon folding (was: B

From: Ihor Radchenko
Subject: [FR] Make org-occur highlights always visible, even upon folding (was: Bug or expected behavior? org-sparse-tree visibility toggling)
Date: Fri, 24 Mar 2023 12:16:15 +0000

Cassio Koshikumo <ckoshikumo@gmail.com> writes:

> Hm. It makes sense that TAB is not affected... Somehow I hadn't really
> considered that.
> What I expected to happen (and now I realize it was not a justified
> expectation) was to have the visibility of the sparse-tree kept while
> tabbing. So I could expand a tree, then collapse it again, all the
> while keeping the sparse-tree "filter" applied. But I guess it doesn't
> make much sense.
> Well, I guess I could leave it as a suggestion for new functionality,
> but I don't even know if it's feasible.

It is not very hard to do, actually. See the attached patch.

However, I am not sure if it is something of interest for other Org

If there is more support, I can convert the patch into proper new Org
feature, adding customization and necessary ORG-NEWS announcement.

>From d3e8d0a9fc235b025f005158cc51f21e5e2ec8ee Mon Sep 17 00:00:00 2001
From: Ihor Radchenko <yantar92@posteo.net>
Date: Fri, 24 Mar 2023 13:10:37 +0100
Subject: [PATCH] org-highlight-new-match: Make highlights always visible

* lisp/org.el (org-highlight-new-match): Make highlights always
visible, even upon folding.
 lisp/org.el | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lisp/org.el b/lisp/org.el
index 20e6ea6d9..1834eadbc 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -10762,10 +10762,15 @@ (defun org-occur-next-match (&optional n _reset)
 (defun org-highlight-new-match (beg end)
   "Highlight from BEG to END and mark the highlight is an occur headline."
-  (let ((ov (make-overlay beg end)))
+  (let ((ov (make-overlay beg end))
+        (ov-line (make-overlay
+                  (org-with-point-at beg (max (point-min) (1- (pos-bol))))
+                  (org-with-point-at end (pos-eol)))))
     (overlay-put ov 'face 'secondary-selection)
     (overlay-put ov 'org-type 'org-occur)
-    (push ov org-occur-highlights)))
+    (overlay-put ov-line 'invisible 'org-occur)
+    (push ov org-occur-highlights)
+    (push ov-line org-occur-highlights)))
 (defun org-remove-occur-highlights (&optional _beg _end noremove)
   "Remove the occur highlights from the buffer.

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>

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