> 2020年9月12日 下午9:33，Ergus <spacibba@aol.com> 写道：
> 
> On Sat, Sep 12, 2020 at 01:10:57PM +0000, Gregory Heytings wrote:
>> 
>>> 
>>>> If there was a built-in vertical mode it would be better / more intuitive.
>>> 
>>> Could you try the branch feature/icomplete-vertical? I need some testers before adding it to master.
>>> 
>> 
>> Alas no, I have been using the following to have icomplete-vertical for quite some time, it works perfectly well, so I don't see why a more complex implementation would be necessary.
>> 
>> (setq icomplete-prospects-height 6)
>> (setq icomplete-separator "\n")
>> (defun icomplete-vertical-minibuffer-setup ()
>> (setq truncate-lines t)
>> (setq-local completion-ignore-case t)
>> (setq-local read-file-name-completion-ignore-case t)
>> (setq-local read-buffer-completion-ignore-case t)
>> (setq icomplete-hide-common-prefix nil))
>> (add-hook 'icomplete-minibuffer-setup-hook #'icomplete-vertical-minibuffer-setup)
>> (defun icomplete-vertical-reformat-completions (completions)
>> (save-match-data
>>   (let ((cnp (substring-no-properties completions)))
>>     (if (string-match "^\\((.*)\\|\\[.+\\]\\)?{\\(\\(?:.\\|\n\\)+\\)}" cnp)
>>         (format "%s \n%s"
>>                 (or (match-string 1 cnp) "")
>>                 (replace-regexp-in-string "^" (make-string (current-column) ? ) (match-string 2 cnp)))
>>       cnp))))
>> (defun icomplete-vertical-adjust-minibuffer-height (completions)
>> (let* ((comp (icomplete-vertical-reformat-completions completions))
>>        (complen (length (split-string comp "\n"))))
>>   (if (> complen 1) (enlarge-window (- icomplete-prospects-height (1- (window-height)))))
>>   comp))
>> (advice-add 'icomplete-completions :filter-return #'icomplete-vertical-adjust-minibuffer-height)
> 
> 1) Internal functionalities try not to use advises.
> 2) The branch is not actually more complex, it just generates the
> formatted vertical output form the beginning.
> 3) It does more or less the same you are doing but with a simpler
> config:
> 
> (icomplete-mode t)
> (icomplete-format 'vertical)
> 
> 4) We add arrow bindings to move
> 5) Add completion matching faces is also coming.
> 

Some feedback about  branch : feature/icomplete-vertical  

I tried this branch with config:

  (icomplete-mode 1)
  (setq icomplete-format 'vertical)



And found this bug still exists:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24293
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=39379

Some related links about how to work around this bug:

https://www.reddit.com/r/emacs/comments/fswt7c/using_icomplete_vertically/fm86m0q?utm_source=share&utm_medium=web2x&context=3
https://www.reddit.com/r/emacs/comments/fswt7c/using_icomplete_vertically/fm8z6h0?utm_source=share&utm_medium=web2x&context=3

Hope the problem of   disappearing prompt and entered text problem can be fixed in your branch.