[mew-int 00392] Re: keybinding on DEL

[Kazu Yamamoto ( 山本和彦 )]

From: HAYATA Takahiro <hayata at example.com>
Subject: [mew-int 00388] keybinding on DEL

> REPORT:
> In Emacs-21.0.103, I think it is an idea to add
> 
>     (define-key mew-summary-mode-map [delete] 'mew-summary-prev-page)
> 
> to "mew-key.el". I found
> 
>     (define-key mew-summary-mode-map "\177" 'mew-summary-prev-page)
> 
> does not work due to (perhaps) the difference of Emacs21's handling
> of [backspace] and [delete].

I investigate this problem deeply. When we type a "KEY", it converts a
"CHARACTER". 

"\010" (^H) and "\177" (^?) belong to the character level.
'delete and 'backspace belong to the key level.

And if we load "term/keyswap", the definition of the ^H *key* changes.

Emacs 20.7:

	KEY                     ^H  DEL BS 
	CHARACTER               ^H  ^?  ^?
	CHARACTER with keywwap  ^?  ^?  ^?

Emacs 21:

	KEY                     ^H  DEL BS 
	CHARACTER               ^H  ^D  ^?
	CHARACTER with keywwap  ^?  ^D  ^?

I guess you typed the "DEL" key on Emacs 21.

Probabley workaround is to write both of the following lines:

	(define-key mew-summary-mode-map "\177" 'mew-summary-prev-page)
	(define-key mew-summary-mode-map [delete] 'mew-summary-prev-page)

--Kazu