From: netawater <netstandin-003@yahoo.com.cn>
To: help-gnu-emacs@gnu.org
Subject: Re: How to get current keymap
Date: Mon, 08 Dec 2008 22:39:28 +0800 [thread overview]
Message-ID: <87skoy3f4v.fsf@emacs.Arch.net> (raw)
In-Reply-To: mailman.2157.1228671183.26697.help-gnu-emacs@gnu.org
"Drew Adams" <drew.adams@oracle.com> writes:
>> >> I used (concat (symbol-name major-mode) "-map") to get
>> >> current keymap, but it failed for LaTeX mode. Are there
>> >> other methode to get current keymap.
>> >
>> > If I enter a buffer, do `M-x latex-mode',
>> > then M-: (concat (symbol-name major-mode) "-map")
>> > it returns "latex-mode-map". What did you want?
>> >
>> > That's the name of a symbol whose value is the latex mode
>> > keymap. If you want the keymap itself, then you want this:
>> >
>> > (symbol-value ; Value of
>> > (intern ; Symbol whose name is
>> > (concat (symbol-name major-mode) "-map")))
>> >
>> > However, (current-local-map) gives you the same thing, and
>> > it works regardless of the name of the symbol.
>> >
>> > (eq (symbol-value
>> > (intern
>> > (concat (symbol-name major-mode) "-map")))
>> > (current-local-map))
>> >
>> > => t
>>
>> A different way to find the symbol, instead of relying on its name:
>>
>> (when (current-local-map)
>> (let ((result nil))
>> (mapatoms (function (lambda (symbol)
>> (when (and (boundp symbol)
>> (eq (symbol-value symbol)
>> (current-local-map)))
>> (push symbol result)))))
>> result))
>
> Yes. To be clear, I didn't mean to suggest that one should use the
> map-variable's name, or that the above `eq' sexp would always return t. What I
> meant was that, for _LaTeX_ mode, the two expressions are `eq'. I should have
> made that clear. My point was to _not_ rely on the name, but to use
> `current-local-map' instead.
>
> Most uses of keymaps never require knowing the map variable itself; its value
> can be used directly. But if for some reason one needs the map variable, then
> the code you provided is the way to go.
Thank you very much for repling, I have resolved my problem. thanks very much!
prev parent reply other threads:[~2008-12-08 14:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-06 14:37 How to get current keymap netawater
2008-12-06 18:24 ` Xah Lee
2008-12-06 21:37 ` Rupert Swarbrick
2008-12-07 5:28 ` netawater
2008-12-07 6:35 ` Drew Adams
2008-12-07 6:49 ` Drew Adams
2008-12-07 15:09 ` Kevin Rodgers
2008-12-07 17:33 ` Drew Adams
[not found] ` <mailman.2157.1228671183.26697.help-gnu-emacs@gnu.org>
2008-12-08 14:39 ` netawater [this message]
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