List all bindings in a keymap

List all bindings in a keymap

[Dmitry Gutov]

Hi all,

How do I do that, short of traversing the keymap structure manually?

The doc recommends to use `map-keymap', but it doesn't exactly do what I
want, and if I try to use it recursively, it reliably blows up with
"max-lisp-eval-depth exceeded". Example snippet:

(defun scan-keymap (map)
  (map-keymap (lambda (event binding)
                (if (consp binding)
                    (progn (message "cdadr %s" (cdadr binding))
                           (scan-keymap (cdadr binding)))
                  (message "%s" binding))) diff-hl-mode-map))

(require 'js)
(scan-keymap js-mode-map)

--Dmitry

RE: List all bindings in a keymap

[Doug Lewan]

Dmitry,

1. diff-hl-mode-map doesn't seem to be defined.
2. You haven't passed a keymap to (map-keymap) (second arg).
3. According to the info documentation of (map-keymap): "This function is the cleanest way to examine all the bindings in a keymap." (info node "Scanning Keymaps".)
While I'm hardly an expert on keymaps I would bet that that already recurses "in the right way". (That's my guess for "max-lisp-eval-depth exceeded".)

I hope this helps.

,Doug

> -----Original Message-----
> From: help-gnu-emacs-bounces+dougl=shubertticketing.com@gnu.org
> [mailto:help-gnu-emacs-bounces+dougl=shubertticketing.com@gnu.org] On
> Behalf Of Dmitry Gutov
> Sent: Monday, 2012 September 24 08:02
> To: help-gnu-emacs@gnu.org
> Subject: List all bindings in a keymap
> 
> Hi all,
> 
> How do I do that, short of traversing the keymap structure manually?
> 
> The doc recommends to use `map-keymap', but it doesn't exactly do what
> I
> want, and if I try to use it recursively, it reliably blows up with
> "max-lisp-eval-depth exceeded". Example snippet:
> 
> (defun scan-keymap (map)
>   (map-keymap (lambda (event binding)
>                 (if (consp binding)
>                     (progn (message "cdadr %s" (cdadr binding))
>                            (scan-keymap (cdadr binding)))
>                   (message "%s" binding))) diff-hl-mode-map))
> 
> (require 'js)
> (scan-keymap js-mode-map)
> 
> --Dmitry
> 

RE: List all bindings in a keymap

[Drew Adams]

> How do I do that, short of traversing the keymap structure manually?

`describe-keymap', in help-fns+.el

http://www.emacswiki.org/emacs-en/download/help-fns%2b.el

Re: List all bindings in a keymap

[Dmitry Gutov]

Ouch!

On 24.09.2012 17:59, Doug Lewan wrote:
> 1. diff-hl-mode-map doesn't seem to be defined.

That was exactly the problem. It's a keymap I have defined, but I should 
be using the function argument (map) instead.

Thanks for noticing!

--Dmitry

Re: List all bindings in a keymap

[Dmitry Gutov]

On 24.09.2012 18:22, Drew Adams wrote:
>> How do I do that, short of traversing the keymap structure manually?
>
> `describe-keymap', in help-fns+.el
>
> http://www.emacswiki.org/emacs-en/download/help-fns%2b.el

Thanks, but I meant programmatically.
Specifically, I'm going to take all the bindings from my minor mode 
keymap and do some stuff with them.

Re: List all bindings in a keymap

[Pascal J. Bourguignon]

Dmitry Gutov <dgutov@yandex.ru> writes:

> Hi all,
>
> How do I do that, short of traversing the keymap structure manually?
>
> The doc recommends to use `map-keymap', but it doesn't exactly do what I
> want, and if I try to use it recursively, it reliably blows up with
> "max-lisp-eval-depth exceeded". Example snippet:
>
> (defun scan-keymap (map)
>   (map-keymap (lambda (event binding)
>                 (if (consp binding)
>                     (progn (message "cdadr %s" (cdadr binding))
>                            (scan-keymap (cdadr binding)))
>                   (message "%s" binding))) diff-hl-mode-map))
>
> (require 'js)
> (scan-keymap js-mode-map)

Check
https://gitorious.org/com-informatimago/emacs/blobs/blame/256fae6797241e707b3bc79cc7812a82074948a1/pjb-emacs.el#line1750

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.

Re: List all bindings in a keymap

[Dmitry Gutov]

"Pascal J. Bourguignon" <pjb@informatimago.com> writes:

 > Dmitry Gutov <dgutov@yandex.ru> writes:
 >> How do I do that, short of traversing the keymap structure manually?
 >
 > Check
 > 
https://gitorious.org/com-informatimago/emacs/blobs/blame/256fae6797241e707b3bc79cc7812a82074948a1/pjb-emacs.el#line1750

Thanks, but I got a simpler solution with `map-keymap' working, see:

https://github.com/dgutov/diff-hl/blob/a01d2917a07d91269c13901bb65fd7ef54766fd4/diff-hl.el#L327