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RE: ctl-x-map key binding conventions for new major/minor modes

From: Tino Calancha
Subject: RE: ctl-x-map key binding conventions for new major/minor modes
Date: Sat, 13 May 2017 14:33:45 +0900 (JST)
User-agent: Alpine 2.20 (DEB 67 2015-01-07)

On Fri, 12 May 2017, Drew Adams wrote:

(info "(elisp) Key Binding Conventions")
Do we need a recommendation in this node about bindings with
prefix 'C-x'?  There is no guidance in the node above about
this topic.  Just loading a new mode shouldn't shadow some
previous C-x bindings, right?

For instance,
* timeclock.el suggests some C-x bindings in the comentary, that is,
   it doesn't define these bindings by default.
* dired-x.el has the user option `dired-bind-jump' to control if
   `dired-jump' must be bound or not to 'C-x C-j'.
* find-func.el has the autoloaded function `find-function-setup-keys',
   which binds some commands into `ctl-x-map'.

Are you asking whether code that is distributed with Emacs
should bind keys with prefix `C-x'?  That's usually discussed
and decided case by case, e.g. on this list.

Are you asking whether we should make particular recommendations
in this regard for 3rd-party code?  If so, I think not.
I am asking for both.
For example, magit.el suggests the binding 'C-x g' for `magit-status'.  It
doesn't establish the binding automatically, though.

Imagine one user sets that binding in her .emacs file.  Now she loads
a lib `foo.el' which automatically sets a global binding
'C-x g' to `foo-whatever'.

In the examples above (timeclock, dired-x, etc) the user can easily
control such key binding collisions.  It's something good for people
loading many libs.
We might add a recommendation in that info node about 'C-x ...'
as we do with 'C-c ...'.

Loading a 3rd-party library is optional.  If a library binds keys
just by loading it then that should at least be made clear in the
library doc/commentary.  A user can always override any bindings
that might be made by a library, but s?he should be aware of what
happens when the library is loaded or a mode is turned on.

Have you noticed an actual problem in this regard?
No yet.

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