bug#53498: [PATCH] Fix tabulated-list-widen-current-column not working for non-strings

[Thuna]

Previously tabulted-list-widen-current-column failed to work when point
was at or ahead of a button or an image.  It now checks for image width
and button width.  Button width calculation doesn't account for the
properties of the button, however, so that is left there as a FIXME.

>From c5d6b80867f7f02b8ecbc5ed7dc8009c570831ac Mon Sep 17 00:00:00 2001
From: Thuna <thuna.cing@gmail.com>
Date: Mon, 24 Jan 2022 12:40:13 +0300
Subject: [PATCH] Fix tabulated-list-widen-current-column not working for
 non-strings

* tabulated-list.el (tabulated-list-widen-current-column): Consider
buttons and images when calculating the width of the contents of a
cell.
---
 lisp/emacs-lisp/tabulated-list.el | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/lisp/emacs-lisp/tabulated-list.el 
b/lisp/emacs-lisp/tabulated-list.el
index 7ad4f7f863..2ace7ebb35 100644
--- a/lisp/emacs-lisp/tabulated-list.el
+++ b/lisp/emacs-lisp/tabulated-list.el
@@ -734,7 +734,16 @@ tabulated-list-widen-current-column
                        (max (setq col-width
                                   (cadr (aref tabulated-list-format
                                               col-nb)))
-                            (string-width (aref entry col-nb)))
+                            (let ((desc (aref entry col-nb)))
+                              (cond
+                               ((stringp desc)
+                                (string-width desc))
+                               ((eq (car desc) 'image)
+                                (car (image-size desc)))
+                               (t (string-width (car desc))
+                                  ;; FIXME: Take into consideration the 
properties
+                                  ;;        of the button when calculating 
width
+                                  ))))
                        (or (plist-get (nthcdr 3 (aref tabulated-list-format
                                                       col-nb))
                                       :pad-right)
-- 
2.25.1