Re: Listing headings in dedicated buffer with imenu.

[Stephen Berman <stephen.berman@gmx.net>]

On Mon, 29 Jul 2024 10:41:08 +0000 Heime <heimeborgia@protonmail.com> wrote:

> Sent with Proton Mail secure email.
>
> On Monday, July 29th, 2024 at 10:32 PM, Stephen Berman
> <stephen.berman@gmx.net> wrote:
>
>> On Mon, 29 Jul 2024 10:26:22 +0000 Heime heimeborgia@protonmail.com wrote:
>>
>> > Sent with Proton Mail secure email.
>> >
>> > On Monday, July 29th, 2024 at 9:33 PM, Stephen Berman
>> > stephen.berman@gmx.net wrote:
>> >
>> > > On Mon, 29 Jul 2024 08:48:38 +0000 Heime heimeborgia@protonmail.com wrote:
>> > >
>> > > > I wish to list headings in a dedicated buffer with imenu.
>> > > > The listing should be in the order in which headings occur
>> > > > in the buffer.
>> > > >
>> > > > Have done the following, but the buffer ends up empty.
>> > > >
>> > > > (defun vodil-imenu-bfh ()
>> > > > "Insert imenu headings in order in a dedicated buffer."
>> > > > (interactive)
>> > > >
>> > > > (let ((imenu-items (imenu--make-index-alist t))
>> > > > (buffer-name "Imenu Headings"))
>> > > > (with-current-buffer (get-buffer-create buffer-name)
>> > > > (erase-buffer)
>> > > > (dolist (item imenu-items)
>> > > > (let ((name (car item))
>> > > > (position (cdr item)))
>> > > > (when (and (stringp name) (number-or-marker-p position))
>> > > > (insert (format "%s\n" name)))))
>> > > > (goto-char (point-min)))
>> > > > (pop-to-buffer buffer-name)))
>> > >
>> > > It works for me, as long as imenu.el is loaded.
>> > >
>> > > Steve Berman
>> >
>> > What would I need to load it ?
>>
>>
>> One way is this:
>>
>> (defun vodil-imenu-bfh ()
>> "Insert imenu headings in order in a dedicated buffer."
>> (interactive)
>> (eval-when-compile
>> (require 'imenu))
>> (let ((imenu-items (imenu--make-index-alist t))
>> (buffer-name "Imenu Headings"))
>> (with-current-buffer (get-buffer-create buffer-name)
>> (erase-buffer)
>> (dolist (item imenu-items)
>> (let ((name (car item))
>> (position (cdr item)))
>> (when (and (stringp name) (number-or-marker-p position))
>> (insert (format "%s\n" name)))))
>> (goto-char (point-min)))
>> (pop-to-buffer buffer-name)))
>>
>> Steve Berman
>
> Right.  I have this function that I run.  Running vodil-imenu-bfh
> after executing vodil-imenu-expr gives me rescan in the buffer.
>
> (defun vodil-imenu-expr ()
>   "Set up `imenu` to show a list of functions in the current buffer."
>
>   (interactive)
>
>   (setq imenu-generic-expression
>     '( ("headings" "^;;;\\s-+\\([HM][[:digit:]]\\)\\s-+\\(.*\\)" 2)))
>
>   (imenu-add-to-menubar "Iml")
>   (imenu--make-index-alist t)
>   (call-interactively 'imenu))

What were the contents of the current buffer when you executed
vodil-imenu-expr?

Steve Berman