Subject: bug#49321: 28.0.50; [PATCH] Add option icomplete-matches-format

From: Gabriel <[email-masked]>
Date: Thu, 01 Jul 2021 16:39:45 -0300

This patch adds a new user option to lisp/icomplete.el called
'icomplete-matches-format', similar to 'lazy-count-prefix-format'.

>From 47fbdb57abb38972f2b0929760e4043583ba16a8 Mon Sep 17 00:00:00 2001
From: Gabriel do Nascimento Ribeiro <[email-masked]>
Date: Thu, 1 Jul 2021 16:29:24 -0300
Subject: [PATCH 1/1] Add option icomplete-matches-format

* lisp/icomplete.el (icomplete-matches-format): New user option.
---
 lisp/icomplete.el | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lisp/icomplete.el b/lisp/icomplete.el
index 26698c43cf..67bae49b9e 100644
--- a/lisp/icomplete.el
+++ b/lisp/icomplete.el
@@ -97,6 +97,12 @@ icomplete-with-completion-tables
   :type '(choice (const :tag "All" t)
 		 (repeat function)))
 
+(defcustom icomplete-matches-format "%s/%s "
+  "Format of the current/total number of matches for the prompt prefix."
+  :version "28.1"
+  :type '(choice (const :tag "No prefix" nil)
+                 (string :tag "Prefix format string" "%s/%s ")))
+
 (defface icomplete-first-match '((t :weight bold))
   "Face used by Icomplete for highlighting first match."
   :version "24.4")
@@ -696,12 +702,10 @@ icomplete-exhibit
               (overlay-put
                icomplete-overlay 'before-string
                (and icomplete-scroll
-                    (let ((past (length icomplete--scrolled-past)))
-                      (format
-                       "%s/%s "
-                       (1+ past)
-                       (+ past
-                          (safe-length completion-all-sorted-completions))))))
+                    (let* ((past (length icomplete--scrolled-past))
+                           (current (1+ past))
+                           (total (+ past (safe-length completion-all-sorted-completions))))
+                      (format (or icomplete-matches-format "") current total))))
               (overlay-put icomplete-overlay 'after-string text))))))))
 
 (defun icomplete--affixate (md prospects)
-- 
2.32.0