Daniel Borchmann <daniel.borchm...@tu-dresden.de> writes:

> Dear all,
>
> I regularly lose all my filters when I bury a sticky agenda and revive
> it later.  In that case, the variable `org-agenda-tag-filter' is set to
> nil, although it was non-nil before burying.
>
> I played around a bit, and found out that `org-agenda-tag-filter' is
> buffer-local (which is not a surprise).  When the agenda buffer is
> revived, the function `org-agenda-prepare' is called, which, among
> others, should reset the filters (provided that
> `org-agenda-persistent-filter' is set).  The beginning of the function
> is
>
> --->8---
> (defun org-agenda-prepare (&optional name)
>   (let ((filter-alist (if org-agenda-persistent-filter
>                           (list `(tag . ,org-agenda-tag-filter)
>                                 `(re . ,org-agenda-regexp-filter)
>                                 `(car . ,org-agenda-category-filter)))))
>   ...))
> ---8<---
>
> It seems to me that `org-agenda-tag-filter' is read *before* the old
> agenda buffer is poped up (i.e., made current), and thus results in a
> `nil' value.  Indeed, if I replace the definition of `filter-alist' by
>
> --->8---
> (let ((filter-alist (if org-agenda-persistent-filter
>                         (with-current-buffer
>                             (get-buffer org-agenda-buffer-name)
>                           (list `(tag . ,org-agenda-tag-filter)
>                                 `(re . ,org-agenda-regexp-filter)
>                                 `(car . ,org-agenda-category-filter))))))
>   ...)
> ---8<---
>
> then the bug (seems to) disappear.
>
> My question is now: is this correct, or did I understand something
> wrong?  If my understanding is correct, how this bug be fixed more
> elegantly?

It doesn't work at startup when agenda hasn't been built yet. The
following patch does seem to fix that. If it's ok, I can push it.
From d2e8fef81585c249f33fa37260f6228709a67017 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9goire=20Jadi?= <gregoire.j...@univ-nantes.fr>
Date: Fri, 12 Jun 2015 17:35:30 +0200
Subject: [PATCH] lisp/org-agenda.el : Fix non-persistent filters when
 refreshing sticky agenda

* lisp/org-agenda.el (org-agenda-prepare): Fix non-persistent filters when refreshing sticky agenda

When a sticky agenda is buried, then reviving and refreshing, existing
filters are ignored even when org-agenda-persistent-filter is `t'.

Reported and fixed by Daniel Borchmann
---
 lisp/org-agenda.el | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lisp/org-agenda.el b/lisp/org-agenda.el
index f5d1022..3a1f5bc 100644
--- a/lisp/org-agenda.el
+++ b/lisp/org-agenda.el
@@ -3642,10 +3642,11 @@ FILTER-ALIST is an alist of filters we need to apply when
 
 (defun org-agenda-prepare (&optional name)
   (let ((filter-alist (if org-agenda-persistent-filter
-			  (list `(tag . ,org-agenda-tag-filter)
-				`(re . ,org-agenda-regexp-filter)
-				`(effort . ,org-agenda-effort-filter)
-				`(car . ,org-agenda-category-filter)))))
+			  (with-current-buffer
+			      (get-buffer-create org-agenda-buffer-name)
+			    (list `(tag . ,org-agenda-tag-filter)
+				  `(re . ,org-agenda-regexp-filter)
+				  `(car . ,org-agenda-category-filter))))))
     (if (org-agenda-use-sticky-p)
 	(progn
 	  (put 'org-agenda-tag-filter :preset-filter nil)
-- 
1.9.1

Best,

-- 
Daimrod/Greg

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