From: jao <jao@gnu.org>
To: notmuch@notmuchmail.org
Cc: jao <jao@gnu.org>
Subject: [PATCH v2 1/1] emacs: notmuch-show-header-line: allow format strings and functions
Date: Mon, 16 May 2022 03:20:39 +0100 [thread overview]
Message-ID: <20220516022039.551596-2-jao@gnu.org> (raw)
In-Reply-To: <20220516022039.551596-1-jao@gnu.org>
If a string value is assigned to notmuch-show-header-line, it's used
as a format string to be passed passed to format-spec with `%s`
substituted by the message's subject. If a function is given, it's
called with the subject as argument, and its return value used as
header line.
As before, t means displaying the subject and nil not using any header
line.
Signed-off-by: jao <jao@gnu.org>
---
emacs/notmuch-show.el | 37 ++++++++++++++++++++++++++++++-------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 7c1f02c9..79599480 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -85,8 +85,26 @@ visible for any given message."
:group 'notmuch-show)
(defcustom notmuch-show-header-line t
- "Show a header line with the current message's subject."
- :type 'boolean
+ "Show a header line in notmuch show buffers.
+
+If t (the default), the header line will contain the current
+message's subject.
+
+If a string, this value is interpreted as a format string to be
+passed to `format-spec` with `%s` as the substitution variable
+for the message's subject. E.g., to display the subject trimmed
+to a maximum of 80 columns, you could use \"%>-80s\" as format.
+
+If you assign to this variable a function, the function will be
+called with the subject as argument and its return value used as
+the header line.
+
+Finally, if this variabale is set to nil, no header is
+displayed."
+ :type '(choice (const :tag "No header" ni)
+ (const :tag "Subject" t)
+ (string :tag "Format")
+ (function :tag "Function"))
:group 'notmuch-show)
(defcustom notmuch-show-relative-dates t
@@ -1351,11 +1369,16 @@ If no messages match the query return NIL."
(lambda () (notmuch-show-set-prop :orig-tags (notmuch-show-get-tags))))
;; Set the header line to the subject of the first message.
(when notmuch-show-header-line
- (setq header-line-format
- (replace-regexp-in-string "%" "%%"
- (notmuch-sanitize
- (notmuch-show-strip-re
- (notmuch-show-get-subject))))))
+ (let* ((s (replace-regexp-in-string "%" "%%"
+ (notmuch-sanitize
+ (notmuch-show-strip-re
+ (notmuch-show-get-subject)))))
+ (h (cond ((stringp notmuch-show-header-line)
+ (format-spec notmuch-show-header-line `((?s . ,s))))
+ ((functionp notmuch-show-header-line)
+ (funcall notmuch-show-header-line s))
+ (notmuch-show-header-line s))))
+ (setq header-line-format h)))
(run-hooks 'notmuch-show-hook)
(if state
(notmuch-show-apply-state state)
--
2.36.1
next prev parent reply other threads:[~2022-05-16 2:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-16 2:20 [PATCH v2 0/1] notmuch-show-header-line: allow format strings and functions jao
2022-05-16 2:20 ` jao [this message]
2022-05-17 20:30 ` [PATCH v2 1/1] emacs: " Tomi Ollila
2022-05-17 21:41 ` Jose A Ortega Ruiz
2022-05-18 9:58 ` David Bremner
2022-05-18 19:31 ` Jose A Ortega Ruiz
2022-05-17 21:49 ` Jose A Ortega Ruiz
2022-05-18 13:36 ` Tomi Ollila
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