From: jao <jao@gnu.org>
To: notmuch@notmuchmail.org
Cc: jao <jao@gnu.org>
Subject: [PATCH v4] emacs: notmuch-tree: customizable strings for drawing trees
Date: Tue, 31 Aug 2021 02:21:06 +0100 [thread overview]
Message-ID: <20210831012106.730482-1-jao@gnu.org> (raw)
New customizable variable, notmuch-tree-thread-symbols, that allows
tweaking of how trees in a forest are represented. For instance, one
can now choose to use an hyphen rather than a white space as a prefix,
or replace the character(s) used to draw arrows.
---
emacs/notmuch-tree.el | 44 +++++++++++++++++++++++++++++++++----------
1 file changed, 34 insertions(+), 10 deletions(-)
diff --git a/emacs/notmuch-tree.el b/emacs/notmuch-tree.el
index b48a132d..485e89a8 100644
--- a/emacs/notmuch-tree.el
+++ b/emacs/notmuch-tree.el
@@ -74,6 +74,30 @@
notmuch-unthreaded-show-out
notmuch-tree-show-out))
+(defcustom notmuch-tree-thread-symbols
+ '((prefix . " ")
+ (top . "─")
+ (top-tee . "┬")
+ (vertical . "│")
+ (vertical-tee . "├")
+ (bottom . "╰")
+ (arrow . "►"))
+ "Strings used to draw trees in notmuch tree results.
+Symbol keys denote where the corresponding string value is used:
+`prefix' is used at the top of the tree, followed by `top' if it
+has no children or `top-tee' if it does; `vertical' is a bar
+connecting with a response down the list skipping the current
+one, while `vertical-tee' marks the current message as a reply to
+the previous one; `bottom' is used at the bottom of threads.
+Finally, the `arrrow' string in the list is used as a pointer to
+every message.
+
+Common customizations include setting `prefix' to \"-\", to see
+equal-length prefixes, and `arrow' to an empty string or to a
+different kind of arrow point."
+ :type '(alist :key-type symbol :value-type string)
+ :group 'notmuch-tree)
+
(defcustom notmuch-tree-result-format
`(("date" . "%12s ")
("authors" . "%-20s")
@@ -980,20 +1004,20 @@ message together with all its descendents."
(replies (cadr tree)))
(cond
((and (< 0 depth) (not last))
- (push "├" tree-status))
+ (push (alist-get 'vertical-tee notmuch-tree-thread-symbols) tree-status))
((and (< 0 depth) last)
- (push "╰" tree-status))
+ (push (alist-get 'bottom notmuch-tree-thread-symbols) tree-status))
((and (eq 0 depth) first last)
- ;; Choice between these two variants is a matter of taste.
- ;; (push "─" tree-status))
- (push " " tree-status))
+ (push (alist-get 'prefix notmuch-tree-thread-symbols) tree-status))
((and (eq 0 depth) first (not last))
- (push "┬" tree-status))
+ (push (alist-get 'top-tee notmuch-tree-thread-symbols) tree-status))
((and (eq 0 depth) (not first) last)
- (push "╰" tree-status))
+ (push (alist-get 'bottom notmuch-tree-thread-symbols) tree-status))
((and (eq 0 depth) (not first) (not last))
- (push "├" tree-status)))
- (push (concat (if replies "┬" "─") "►") tree-status)
+ (push (alist-get 'vertical-tee notmuch-tree-thread-symbols) tree-status)))
+ (push (concat (alist-get (if replies 'top-tee 'top) notmuch-tree-thread-symbols)
+ (alist-get 'arrow notmuch-tree-thread-symbols))
+ tree-status)
(setq msg (plist-put msg :first (and first (eq 0 depth))))
(setq msg (plist-put msg :tree-status tree-status))
(setq msg (plist-put msg :orig-tags (plist-get msg :tags)))
@@ -1002,7 +1026,7 @@ message together with all its descendents."
(pop tree-status)
(if last
(push " " tree-status)
- (push "│" tree-status))
+ (push (alist-get 'vertical notmuch-tree-thread-symbols 3) tree-status))
(notmuch-tree-insert-thread replies (1+ depth) tree-status)))
(defun notmuch-tree-insert-thread (thread depth tree-status)
--
2.33.0\r
next reply other threads:[~2021-08-31 1:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 1:21 jao [this message]
2021-08-31 14:17 ` [PATCH v4] emacs: notmuch-tree: customizable strings for drawing trees David Bremner
2021-08-31 18:28 ` Jose Antonio Ortega Ruiz
2021-09-20 23:44 ` David Bremner
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