Disabling minor mode after setting imenu-generic-expression

Disabling minor mode after setting imenu-generic-expression

[Heime]

Have set 'imenu-generic-expression' for a buffer when it is in 'emacs-lisp-mode'
using '(eq major-mode'.  But how do I revert back to the initial sate after disabling
the minor mode ?  What should 'tema-disable-function' do  exactly ?

(defun tema-expr-elisp ()

  (setq imenu-generic-expression
    `( ("defun"
          ,(concat "^\\s-*"
                   "(\\(defun\\|define-minor-mode\\)\\s-+"
                   "\\(\\(\\sw\\|\\s_\\)+\\)") 2) )) )

;;;###autoload
(define-minor-mode tema-minor-mode
  "DESC."
  :init-value nil
  :lighter " Tema"

  (if tema-minor-mode
      (progn
        ;; Apply the configuration for the current buffer if the major mode matches
        (cond
          ((eq major-mode 'sh-mode) (tema-expr-sh))
          ((eq major-mode 'emacs-lisp-mode) (tema-expr-elisp))))
    (tema-disable-function) ))

Re: Disabling minor mode after setting imenu-generic-expression

[Yuri Khan]

On Wed, 28 Aug 2024 at 02:01, Heime <heimeborgia@protonmail.com> wrote:
>
> Have set 'imenu-generic-expression' for a buffer when it is in 'emacs-lisp-mode'
> using '(eq major-mode'.  But how do I revert back to the initial sate after disabling
> the minor mode ?  What should 'tema-disable-function' do  exactly ?

You have been asking this question every day for the last week (I
might be exaggerating a bit) and got no answers. This should cue you
to the idea that the functionality you seek is not well suited to be a
minor mode.

You have also not explained why you want different imenu settings at
different times, so your question is an instance of XY problem — you
have a need that you are not telling us, you have a feeling that it
might be solved in a particular way, and you’re asking about that way.

Re: Disabling minor mode after setting imenu-generic-expression

[Heime]

On Wednesday, August 28th, 2024 at 5:15 PM, Yuri Khan <yuri.v.khan@gmail.com> wrote:

> On Wed, 28 Aug 2024 at 02:01, Heime heimeborgia@protonmail.com wrote:
> 
> > Have set 'imenu-generic-expression' for a buffer when it is in 'emacs-lisp-mode'
> > using '(eq major-mode'. But how do I revert back to the initial sate after disabling
> > the minor mode ? What should 'tema-disable-function' do exactly ?
> 
> 
> You have been asking this question every day for the last week (I
> might be exaggerating a bit) and got no answers. This should cue you
> to the idea that the functionality you seek is not well suited to be a
> minor mode.

I already have a minor-mode and I want to add this functionality to it.
There should be nothing bad about doing this.

The imenu-generic-expression is customarily set by the major-mode, but I want
to change it, and then revert back when the mode is disabled. 

 
> You have also not explained why you want different imenu settings at
> different times. 

I want to have matching regexp types in a buffer that I want to match
besides the standard "(defun" thing, but which would not always be needed.  

> So your question is an instance of XY problem — you have a need that 
> you are not telling us, you have a feeling that it might be solved in 
> a particular way, and you’re asking about that way.

I do not see it the way you describe.

Disabling minor mode after setting imenu-generic-expression

[Heime]

Have set 'imenu-generic-expression' for a buffer when it is in 'emacs-lisp-mode'
using '(eq major-mode'.  Customarily, it is the major mode sets the default value
to 'imenu-generic-expression'.  I want to save the original value, so that when 
I deactivate the minor mode, I reset 'imenu-generic-expression' to any previous
value before the minor mode changed it.

How can I do so ?

(defun tema-expr-elisp ()

(setq imenu-generic-expression
  `( ("defun"
        ,(concat "^\\s-*"
                 "(\\(defun\\|define-minor-mode\\)\\s-+"
                 "\\(\\(\\sw\\|\\s_\\)+\\)") 2) )) )

;;;###autoload
(define-minor-mode tema-minor-mode
  "DESC."
  :init-value nil
  :lighter " Tema"

  (if tema-minor-mode
      (progn
        (cond
          ((eq major-mode 'sh-mode) (tema-expr-sh))
          ((eq major-mode 'emacs-lisp-mode) (tema-expr-elisp))))
    (tema-disable-function) ))

Re: Disabling minor mode after setting imenu-generic-expression

[Stefan Monnier via Users list for the GNU Emacs text editor]

> You have been asking this question every day for the last week (I
> might be exaggerating a bit) and got no answers. This should cue you
> to the idea that the functionality you seek is not well suited to be a
> minor mode.

In my case the lack of answer is because I don't understand
the question.
I read it as "After changing the name on my mailbox, how do I set it
back".  Presumably if you know how to change it in the first place, you
should know how to set it back (unless maybe you can change the name on
the mailbox but you can't read the name on the mailbox?).


        Stefan

Re: Disabling minor mode after setting imenu-generic-expression

[Heime]

On Thursday, August 29th, 2024 at 1:21 PM, Stefan Monnier via Users 
list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:

> > You have been asking this question every day for the last week (I
> > might be exaggerating a bit) and got no answers. This should cue you
> > to the idea that the functionality you seek is not well suited to be a
> > minor mode.
> 
> 
> In my case the lack of answer is because I don't understand
> the question.
> I read it as "After changing the name on my mailbox, how do I set it
> back". Presumably if you know how to change it in the first place, you
> should know how to set it back (unless maybe you can change the name on
> the mailbox but you can't read the name on the mailbox?). - Stefan

I could save the default set by the major mode before changing it.  But
will all the buffer local things, I am unsure what to use.  Currently,
I set the value with

(setq imenu-generic-expression

But when disabling the mode I want to revert to the original.