Revert "Allow the flymake mode line indicator to be customized"

This reverts commit 37049ee78c4576d340781179317e6cbaaf73b6c3.

It's not ready to be used, contains some fundamental errors.

See bug#33740.

3 files changed, 96 insertions, 109 deletions

diff --git a/doc/misc/flymake.texi b/doc/misc/flymake.texi
index b8744f0323f..8f2954bdf4f 100644
--- a/doc/misc/flymake.texi
+++ b/doc/misc/flymake.texi
@@ -213,9 +213,6 @@ This section summarizes customization variables used for the
 configuration of the Flymake user interface.
 
 @vtable @code
-@item flymake-mode-line-indicator-format
-Format to use for the Flymake mode line indicator.
-
 @item flymake-no-changes-timeout
 If any changes are made to the buffer, syntax check is automatically
 started after this many seconds, unless the user makes another change,
diff --git a/etc/NEWS b/etc/NEWS
index a5247a9aea8..0231c167112 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1738,11 +1738,6 @@ height of lines or width of chars.
 When non-nil, use a new xwidget webkit session after bookmark jump.
 Otherwise, it will use 'xwidget-webkit-last-session'.
 
-** Flymake mode
-
-+++
-*** New user option 'flymake-mode-line-indicator-format'.
-
 ** Flyspell mode
 
 +++
diff --git a/lisp/progmodes/flymake.el b/lisp/progmodes/flymake.el
index e78d5d32fff..40bb90d0f15 100644
--- a/lisp/progmodes/flymake.el
+++ b/lisp/progmodes/flymake.el
@@ -1190,16 +1190,6 @@ default) no filter is applied."
 
 (put 'flymake--mode-line-format 'risky-local-variable t)
 
-(defcustom flymake-mode-line-indicator-format " Flymake%s[%e %w %n]"
-  "Format to use for the Flymake mode line indicator.
-The following format characters can be used:
-
-%s: The status.
-%e: The number of errors.
-%w: The number of warnings.
-%n: The number of notes."
-  :version "28.1"
-  :type 'string)
 
 (defun flymake--mode-line-format ()
   "Produce a pretty minor mode indicator."
@@ -1217,97 +1207,102 @@ The following format characters can be used:
                                       diags-by-type)))
                      (flymake--backend-state-diags state)))
              flymake--backend-state)
-    (format-spec
-     (propertize
-      flymake-mode-line-indicator-format
-      'mouse-face 'mode-line-highlight
-      'help-echo (concat (format "%s known backends\n" (length known))
-                         (format "%s running\n" (length running))
-                         (format "%s disabled\n" (length disabled))
-                         "mouse-1: Display minor mode menu\n"
-                         "mouse-2: Show help for minor mode")
-      'keymap (let ((map (make-sparse-keymap)))
-                (define-key map [mode-line down-mouse-1]
-                  flymake-menu)
-                (define-key map [mode-line mouse-2]
-                  (lambda ()
-                    (interactive)
-                    (describe-function 'flymake-mode)))
-                map))
-     (cons
-      (cons
-       ?s (pcase-let ((`(,ind ,face ,explain)
-                       (cond ((null known)
-                              '("?" nil "No known backends"))
-                             (some-waiting
-                              `("Wait" compilation-mode-line-run
-                                ,(format "Waiting for %s running backend(s)"
-                                         (length some-waiting))))
-                             (all-disabled
-                              '("!" compilation-mode-line-run
-                                "All backends disabled"))
-                             (t
-                              '(nil nil nil)))))
-            (if (not ind)
-                ""
-              (concat
-               ":" (propertize ind
-                               'face face
-                               'help-echo explain
-                               'keymap (let ((map (make-sparse-keymap)))
-                                         (define-key map [mode-line mouse-1]
-                                           'flymake-switch-to-log-buffer)
-                                         map))))))
-      (cl-loop
-       with types = (hash-table-keys diags-by-type)
-       with _augmented = (cl-loop for extra in '(:error :warning)
-                                  do (cl-pushnew extra types
-                                                 :key #'flymake--severity))
-       for type in (cl-sort types #'> :key #'flymake--severity)
-       for diags = (gethash type diags-by-type)
-       for face = (flymake--lookup-type-property
-                   type 'mode-line-face 'compilation-error)
-       when (or diags
-                (cond ((eq flymake-suppress-zero-counters t)
-                       nil)
-                      (flymake-suppress-zero-counters
-                       (>= (flymake--severity type)
-                           (warning-numeric-level
-                            flymake-suppress-zero-counters)))
-                      (t t)))
-       collect (cons
-                (elt (format "%s" type) 1)
-                (propertize
-                 (format "%d" (length diags))
-                 'face face
-                 'mouse-face 'mode-line-highlight
-                 'keymap
-                 (let ((map (make-sparse-keymap))
-                       (type type))
-                   (define-key map (vector 'mode-line
-                                           mouse-wheel-down-event)
-                     (lambda (event)
-                       (interactive "e")
-                       (with-selected-window (posn-window (event-start event))
-                         (flymake-goto-prev-error 1 (list type) t))))
-                   (define-key map (vector 'mode-line
-                                           mouse-wheel-up-event)
-                     (lambda (event)
-                       (interactive "e")
-                       (with-selected-window (posn-window (event-start event))
-                         (flymake-goto-next-error 1 (list type) t))))
-                   map)
-                 'help-echo
-                 (concat (format "%s diagnostics of type %s\n"
-                                 (propertize (format "%d"
-                                                     (length diags))
-                                             'face face)
-                                 (propertize (format "%s" type)
-                                             'face face))
-                         (format "%s/%s: previous/next of this type"
-                                 mouse-wheel-down-event
-                                 mouse-wheel-up-event))))))
-     nil t)))
+    `((:propertize " Flymake"
+                   mouse-face mode-line-highlight
+                   help-echo
+                   ,(concat (format "%s known backends\n" (length known))
+                            (format "%s running\n" (length running))
+                            (format "%s disabled\n" (length disabled))
+                            "mouse-1: Display minor mode menu\n"
+                            "mouse-2: Show help for minor mode")
+                   keymap
+                   ,(let ((map (make-sparse-keymap)))
+                      (define-key map [mode-line down-mouse-1]
+                        flymake-menu)
+                      (define-key map [mode-line mouse-2]
+                        (lambda ()
+                          (interactive)
+                          (describe-function 'flymake-mode)))
+                      map))
+      ,@(pcase-let ((`(,ind ,face ,explain)
+                     (cond ((null known)
+                            '("?" nil "No known backends"))
+                           (some-waiting
+                            `("Wait" compilation-mode-line-run
+                              ,(format "Waiting for %s running backend(s)"
+                                       (length some-waiting))))
+                           (all-disabled
+                            '("!" compilation-mode-line-run
+                              "All backends disabled"))
+                           (t
+                            '(nil nil nil)))))
+          (when ind
+            `((":"
+               (:propertize ,ind
+                            face ,face
+                            help-echo ,explain
+                            keymap
+                            ,(let ((map (make-sparse-keymap)))
+                               (define-key map [mode-line mouse-1]
+                                 'flymake-switch-to-log-buffer)
+                               map))))))
+      ,@(unless (or all-disabled
+                    (null known))
+          (cl-loop
+           with types = (hash-table-keys diags-by-type)
+           with _augmented = (cl-loop for extra in '(:error :warning)
+                                      do (cl-pushnew extra types
+                                                     :key #'flymake--severity))
+           for type in (cl-sort types #'> :key #'flymake--severity)
+           for diags = (gethash type diags-by-type)
+           for face = (flymake--lookup-type-property type
+                                                     'mode-line-face
+                                                     'compilation-error)
+           when (or diags
+                    (cond ((eq flymake-suppress-zero-counters t)
+                           nil)
+                          (flymake-suppress-zero-counters
+                           (>= (flymake--severity type)
+                               (warning-numeric-level
+                                flymake-suppress-zero-counters)))
+                          (t t)))
+           collect `(:propertize
+                     ,(format "%d" (length diags))
+                     face ,face
+                     mouse-face mode-line-highlight
+                     keymap
+                     ,(let ((map (make-sparse-keymap))
+                            (type type))
+                        (define-key map (vector 'mode-line
+                                                mouse-wheel-down-event)
+                          (lambda (event)
+                            (interactive "e")
+                            (with-selected-window (posn-window (event-start event))
+                              (flymake-goto-prev-error 1 (list type) t))))
+                        (define-key map (vector 'mode-line
+                                                mouse-wheel-up-event)
+                          (lambda (event)
+                            (interactive "e")
+                            (with-selected-window (posn-window (event-start event))
+                              (flymake-goto-next-error 1 (list type) t))))
+                        map)
+                     help-echo
+                     ,(concat (format "%s diagnostics of type %s\n"
+                                      (propertize (format "%d"
+                                                          (length diags))
+                                                  'face face)
+                                      (propertize (format "%s" type)
+                                                  'face face))
+                              (format "%s/%s: previous/next of this type"
+                                      mouse-wheel-down-event
+                                      mouse-wheel-up-event)))
+           into forms
+           finally return
+           `((:propertize "[")
+             ,@(cl-loop for (a . rest) on forms by #'cdr
+                        collect a when rest collect
+                        '(:propertize " "))
+             (:propertize "]")))))))
 
 ;;; Diagnostics buffer