feat(corfu): make minibuffer completion optional

modules/completion/corfu/README.org

@@ -198,6 +198,9 @@ A few variables may be set to change behavior of this module:
 - [[var:+corfu-buffer-scanning-size-limit]]  ::
   Sets the maximum buffer size to be scanned by ~cape-dabbrev~. Defaults to 1 MB.
   Set this if you are having performance problems using the CAPF.
+- [[var:+corfu-want-minibuffer-completion]] ::
+  Whether to enable Corfu in the minibuffer. See its documentation for
+  additional tweaks.
 
 ** Adding CAPFs to a mode
 To add other CAPFs on a mode-per-mode basis, put either of the following in your

modules/completion/corfu/config.el

@@ -11,6 +11,11 @@ Possible values are:
 (defvar +corfu-buffer-scanning-size-limit (* 1 1024 1024) ; 1 MB
   "Size limit for a buffer to be scanned by `cape-dabbrev'.")
 
+(defvar +corfu-want-minibuffer-completion t
+  "Whether to enable Corfu in the minibuffer.
+Setting this to `aggressive' will enable Corfu in more commands which
+use the minibuffer such as `query-replace'.")
+
 ;;
 ;;; Packages
 (use-package! corfu
@@ -18,8 +23,20 @@ Possible values are:
   :init
   (add-hook! 'minibuffer-setup-hook
     (defun +corfu-enable-in-minibuffer ()
-      "Enable Corfu in the minibuffer if `completion-at-point' is bound."
+      "Enable Corfu in the minibuffer."
-      (when (where-is-internal #'completion-at-point (list (current-local-map)))
+      (when (pcase +corfu-want-minibuffer-completion
+              ('aggressive
+               (not (or (bound-and-true-p mct--active)
+                        (bound-and-true-p vertico--input)
+                        (eq (current-local-map) read-passwd-map)
+                        (and (featurep 'helm-core) (helm--alive-p))
+                        (and (featurep 'ido) (ido-active))
+                        (where-is-internal 'minibuffer-complete
+                                           (list (current-local-map)))
+                        (memq #'ivy--queue-exhibit post-command-hook))))
+              ('nil nil)
+              (_ (where-is-internal #'completion-at-point
+                                    (list (current-local-map)))))
         (setq-local corfu-echo-delay nil)
         (corfu-mode +1))))
   :config