Don't pre-load facemenu

* lisp/facemenu.el (facemenu-add-face-function): Move to avoid a
compilation warning.
(facemenu-color-alist): Made obsolete.

* lisp/faces.el (read-color): Don't use it.

* lisp/loadup.el ("emacs-lisp/syntax"): Don't load facemenu.

* lisp/wid-edit.el (color): Don't use facemenu-color-alist.
(widget-color--choose-action): Require facemenu.
(widget-color-action): Ditto.

* lisp/progmodes/cperl-mode.el (facemenu): Require.

* lisp/textmodes/sgml-mode.el (facemenu): Require.

etc/NEWS

@@ -2278,6 +2278,12 @@ directory instead of the default directory.
 
 * Incompatible Lisp Changes in Emacs 28.1
 
+** 'facemenu-color-alist' is now obsolete, and is not used.
+
+** 'facemenu.el' is no longer preloaded.
+To use functions/variables from the package, you now have to say
+'(require 'facemenu)' or similar.
+
 ** 'pcomplete-ignore-case' is now an obsolete alias of 'completion-ignore-case'.
 
 ** 'completions-annotations' face is not used when the caller puts own face.

lisp/facemenu.el

@@ -169,6 +169,14 @@ it will remove any faces not explicitly in the list."
 (defalias 'facemenu-background-menu facemenu-background-menu)
 (put 'facemenu-background-menu 'menu-enable '(facemenu-enable-faces-p))
 
+(defcustom facemenu-add-face-function nil
+  "Function called at beginning of text to change or nil.
+This function is passed the FACE to set and END of text to change, and must
+return a string which is inserted.  It may set `facemenu-end-add-face'."
+  :type '(choice (const :tag "None" nil)
+		 function)
+  :group 'facemenu)
+
 ;;; Condition for enabling menu items that set faces.
 (defun facemenu-enable-faces-p ()
   ;; Enable the facemenu if facemenu-add-face-function is defined
@@ -260,14 +268,6 @@ requested in `facemenu-keybindings'.")
 (defalias 'facemenu-keymap facemenu-keymap)
 
 
-(defcustom facemenu-add-face-function nil
-  "Function called at beginning of text to change or nil.
-This function is passed the FACE to set and END of text to change, and must
-return a string which is inserted.  It may set `facemenu-end-add-face'."
-  :type '(choice (const :tag "None" nil)
-		 function)
-  :group 'facemenu)
-
 (defcustom facemenu-end-add-face nil
   "String to insert or function called at end of text to change or nil.
 This function is passed the FACE to set, and must return a string which is
@@ -291,6 +291,7 @@ May also be t meaning to use `facemenu-add-face-function'."
 (defvar facemenu-color-alist nil
   "Alist of colors, used for completion.
 If this is nil, then the value of (defined-colors) is used.")
+(make-obsolete-variable 'facemenu-color-alist nil "28.1")
 
 (defun facemenu-update ()
   "Add or update the \"Face\" menu in the menu bar.

lisp/faces.el

@@ -1917,12 +1917,11 @@ Interactively, or with optional arg MSG non-nil, print the
 resulting color name in the echo area."
   (interactive "i\np\ni\np")    ; Always convert to RGB interactively.
   (let* ((completion-ignore-case t)
-	 (colors (or facemenu-color-alist
-		     (append '("foreground at point" "background at point")
-			     (if allow-empty-name '(""))
-                             (if (display-color-p)
-                                 (defined-colors-with-face-attributes)
-                               (defined-colors)))))
+	 (colors (append '("foreground at point" "background at point")
+			 (if allow-empty-name '(""))
+                         (if (display-color-p)
+                             (defined-colors-with-face-attributes)
+                           (defined-colors))))
 	 (color (completing-read
 		 (or prompt "Color (name or #RGB triplet): ")
 		 ;; Completing function for reading colors, accepting

lisp/loadup.el

@@ -253,7 +253,6 @@
 (load "startup")
 (load "term/tty-colors")
 (load "font-core")
-(load "facemenu")
 (load "emacs-lisp/syntax")
 (load "font-lock")
 (load "jit-lock")

lisp/progmodes/cperl-mode.el

@@ -92,6 +92,7 @@
 	(concat msg ": ")))))
 
 (eval-when-compile (require 'cl-lib))
+(require 'facemenu)
 
 (defvar msb-menu-cond)
 (defvar gud-perldb-history)

lisp/textmodes/sgml-mode.el

@@ -34,6 +34,7 @@
 
 (require 'dom)
 (require 'seq)
+(require 'facemenu)
 (eval-when-compile (require 'subr-x))
 (eval-when-compile
   (require 'skeleton)

lisp/wid-edit.el

@@ -4034,7 +4034,7 @@ is inline."
                    (mapcar #'length (defined-colors))))
   :tag "Color"
   :value "black"
-  :completions (or facemenu-color-alist (defined-colors))
+  :completions (defined-colors)
   :sample-face-get 'widget-color-sample-face-get
   :notify 'widget-color-notify
   :match #'widget-color-match
@@ -4049,7 +4049,10 @@ is inline."
    :tag " Choose " :action 'widget-color--choose-action)
   (widget-insert " "))
 
+(declare-function list-colors-display "facemenu")
+
 (defun widget-color--choose-action (widget &optional _event)
+  (require 'facemenu)
   (list-colors-display
    nil nil
    (let ((cbuf (current-buffer))
@@ -4072,8 +4075,11 @@ is inline."
 	(list (cons 'foreground-color value))
       'default)))
 
+(declare-function facemenu-read-color "facemenu")
+
 (defun widget-color-action (widget &optional event)
   "Prompt for a color."
+  (require 'facemenu)
   (let* ((tag (widget-apply widget :menu-tag-get))
 	 (prompt (concat tag ": "))
 	 (answer (facemenu-read-color prompt)))