From: Tassilo Horn <tsdh@gnu.org>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: help-gnu-emacs@gnu.org
Subject: Re: My read-buffer-function doesn't work when called by switch-to-buffer
Date: Thu, 16 Mar 2023 10:18:15 +0100 [thread overview]
Message-ID: <87ttylhwyd.fsf@gnu.org> (raw)
In-Reply-To: <87mt4dn8qi.fsf@web.de>
Michael Heerdegen <michael_heerdegen@web.de> writes:
>> Hm, but then it would be pretty specific to `switch-to-buffer'
>> instead of a general `read-buffer-function'. E.g., I just found out
>> it's quite convienient to be able to use `append-to-buffer' to append
>> to a buffer whose file I haven't found already but is in
>> recentf-list.
>
> Depends on what you want of course. It doesn't make sense for
> everything (not for `kill-buffer' for example).
Good point (although it doesn't really hurt). I now made my function a
bit customizable depending on `this-command'.
--8<---------------cut here---------------start------------->8---
(defconst th/read-buffer-or-recentf-command-alist
"Alist with entries of the form (CMD . COMPLETES).
COMPLETES is a list defining what's completed where entries can
be:
- `buffers': completion for all buffers
- `buffers-except': completion for all buffers except the current one
- `recentf': completion for recent files which will be found on demand"
'((kill-buffer buffers)
(switch-to-buffer buffers-except recentf)
(pop-to-buffer buffers-except recentf)))
(defun th/read-buffer-or-recentf (prompt &optional
def require-match predicate)
(let* ((tables (or
(mapcar
(lambda (syms)
(pcase syms
('buffers #'internal-complete-buffer)
('buffers-except (internal-complete-buffer-except
(current-buffer)))
('recentf (completion-table-dynamic
(lambda (s) recentf-list)))
(unknown (error "Unknown case %S" unknown))))
(cdr (assoc this-command
th/read-buffer-or-recentf-command-alist)))
(list #'internal-complete-buffer
(completion-table-dynamic
(lambda (s) recentf-list)))))
(completion-table (apply #'completion-table-in-turn tables)))
;; Bind minibuffer-setup-hook to nil so that we can be sure our completion
;; table is used. `read-buffer-to-switch' (called by `switch-to-buffer')
;; sets `internal-complete-buffer' using `minibuffer-with-setup-hook'
;; before `read-buffer-function' is invoked by `read-buffer', so we'd be
;; restricted to buffers.
(let ((minibuffer-setup-hook nil))
(when-let ((result (completing-read prompt completion-table
predicate require-match nil
'buffer-name-history def)))
(cond
((get-buffer result) result)
((file-exists-p result) (buffer-name (find-file-noselect result)))
(t result))))))
(setopt read-buffer-function #'th/read-buffer-or-recentf)
--8<---------------cut here---------------end--------------->8---
Bye,
Tassilo
next prev parent reply other threads:[~2023-03-16 9:18 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-10 21:10 My read-buffer-function doesn't work when called by switch-to-buffer Tassilo Horn
2023-03-11 0:32 ` Michael Heerdegen
2023-03-11 8:58 ` Tassilo Horn
2023-03-11 20:40 ` `when-let' (was: Re: My read-buffer-function doesn't work when called by switch-to-buffer) Emanuel Berg
2023-03-12 3:32 ` My read-buffer-function doesn't work when called by switch-to-buffer Michael Heerdegen
2023-03-12 18:51 ` Tassilo Horn
2023-03-13 0:32 ` Michael Heerdegen
2023-03-15 9:06 ` Tassilo Horn
2023-03-15 18:57 ` Michael Heerdegen
2023-03-16 9:18 ` Tassilo Horn [this message]
2023-03-16 16:59 ` Tassilo Horn
2023-03-16 23:46 ` Michael Heerdegen
2023-03-17 7:04 ` Tassilo Horn
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