emacs-27 fe0ed17 2/7: Slightly simplify lisp/icomplete.el with new icomplete--category helper

[João Távora]

branch: emacs-27
commit fe0ed17175306dbcd3217e98fd84af2c2e077ce8
Author: João Távora <address@hidden>
Commit: João Távora <address@hidden>

    Slightly simplify lisp/icomplete.el with new icomplete--category helper
    
    * lisp/icomplete.el (icomplete-fido-kill)
    (icomplete-fido-delete-char, icomplete-fido-ret)
    (icomplete-fido-backward-updir, icomplete-exhibit): Use
    icomplete--category.
    (icomplete--category): New helper.
    
    (cherry picked from commit 24a1f520f91c278cb8cc57325ea80285a3b252cf)
---
 lisp/icomplete.el | 39 +++++++++++++++------------------------
 1 file changed, 15 insertions(+), 24 deletions(-)

diff --git a/lisp/icomplete.el b/lisp/icomplete.el
index cd20064..4d6dfcd 100644
--- a/lisp/icomplete.el
+++ b/lisp/icomplete.el
@@ -234,15 +234,13 @@ completed.  If completing files, it means delete the 
file.  If
 completing buffers it means kill the buffer.  Both actions
 require user confirmation."
   (interactive)
-  (let ((beg (icomplete--field-beg)) (end (icomplete--field-end)))
+  (let ((end (icomplete--field-end)))
     (if (< (point) end)
         (call-interactively 'kill-line)
-      (let* ((md (completion--field-metadata beg))
-             (category (alist-get 'category (cdr md)))
-             (all (completion-all-sorted-completions))
+      (let* ((all (completion-all-sorted-completions))
              (thing (car all))
              (action
-              (pcase category
+              (pcase (icomplete--category)
                 (`buffer
                  (lambda ()
                    (when (yes-or-no-p (concat "Kill buffer " thing "? "))
@@ -267,11 +265,8 @@ require user confirmation."
 (defun icomplete-fido-delete-char ()
   "Delete char or maybe call `dired', like `ido-mode'."
   (interactive)
-  (let* ((beg (icomplete--field-beg))
-         (end (icomplete--field-end))
-         (md (completion--field-metadata beg))
-         (category (alist-get 'category (cdr md))))
-    (if (or (< (point) end) (not (eq category 'file)))
+  (let ((end (icomplete--field-end)))
+    (if (or (< (point) end) (not (eq (icomplete--category) 'file)))
         (call-interactively 'delete-char)
       (dired (file-name-directory (icomplete--field-string)))
       (exit-minibuffer))))
@@ -279,10 +274,7 @@ require user confirmation."
 (defun icomplete-fido-ret ()
   "Exit minibuffer or enter directory, like `ido-mode'."
   (interactive)
-  (let* ((beg (icomplete--field-beg))
-         (md (completion--field-metadata beg))
-         (category (alist-get 'category (cdr md)))
-         (dir (and (eq category 'file)
+  (let* ((dir (and (eq (icomplete--category) 'file)
                    (file-name-directory (icomplete--field-string))))
          (current (car (completion-all-sorted-completions)))
          (probe (and dir current
@@ -297,12 +289,10 @@ require user confirmation."
 (defun icomplete-fido-backward-updir ()
   "Delete char before or go up directory, like `ido-mode'."
   (interactive)
-  (let* ((beg (icomplete--field-beg))
-         (md (completion--field-metadata beg))
-         (category (alist-get 'category (cdr md))))
-    (if (and (eq (char-before) ?/) (eq category 'file))
-        (backward-kill-sexp 1)
-      (call-interactively 'backward-delete-char))))
+  (if (and (eq (char-before) ?/)
+           (eq (icomplete--category) 'file))
+      (backward-kill-sexp 1)
+    (call-interactively 'backward-delete-char)))
 
 (defvar icomplete-fido-mode-map
   (let ((map (make-sparse-keymap)))
@@ -392,6 +382,10 @@ completions:
 (defun icomplete--field-end ()
   (if (window-minibuffer-p) (point-max)
     (nth 1 completion-in-region--data)))
+(defun icomplete--category ()
+  (let* ((beg (icomplete--field-beg))
+         (md (completion--field-metadata beg)))
+    (alist-get 'category (cdr md))))
 
 ;;;_ > icomplete-simple-completing-p ()
 (defun icomplete-simple-completing-p ()
@@ -488,10 +482,7 @@ See `icomplete-mode' and `minibuffer-setup-hook'."
                     (sit-for icomplete-compute-delay)))
           (when (and
                  icomplete-tidy-shadowed-file-names
-                 (eq (alist-get 'category
-                                (cdr (completion--field-metadata
-                                      (icomplete--field-beg))))
-                     'file)
+                 (eq (icomplete--category) 'file)
                  rfn-eshadow-overlay (overlay-buffer rfn-eshadow-overlay)
                  (eq this-command 'self-insert-command)
                  (= saved-point (icomplete--field-end))