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From: tbl@k.cs.cmu.edu (Thomas Lord)
Newsgroups: comp.emacs
Subject: Re: C-s/C-q question . . . (really: porting to window managers ...)
Message-ID: <1105@k.cs.cmu.edu>
Date: Mon, 9-Mar-87 01:48:01 EST
Article-I.D.: k.1105
Posted: Mon Mar  9 01:48:01 1987
Date-Received: Tue, 10-Mar-87 04:48:09 EST
References: <8703042025.AA12061@ncifcrf.ncifcrf.uucp>
Organization: Carnegie-Mellon University, CS/RI
Lines: 27
In-reply-to: randy@seismo.CSS.GOV@ncifcrf.UUCP's message of 4 Mar 87 20:25:43 GMT

Posting-Front-End: GNU Emacs 18.36.5 of Sat Feb 14 1987 on k.cs.cmu.edu (berkeley-unix)



randy@seismo wanted to know how to impliment a control prefix.  

The best suggestion is to get a new terminal emulator.
The second best suggestion(s) have involved keymap mucking.

Here is a suggestion from out of left field that may also help those of
you porting gnu-emacs to your favourite window manager:

In the source file keyboard.c is a function called 
kbd_buffer_store_char().  The function is called for each character 
received by emacs, and is a good safe place to impliment out-of-band 
control over emacs.  For the case at hand, kbd_buffer_store_char can
set a flag when it sees "control prefix" and treat the next character
as its control equivalent.


This is a dubious way to do "control prefix", but is useful for other pursuits.
For example, to bring emacs up under a local window manager, we wrote a 
terminal emulator that transmits funny control sequences on a resize.
Since a resize can occur no matter what keymap is active, there is no
way to handle these resizes in lisp.  Instead, they are caught and acted
upon in kbd_buffer_store_char.  


Tom Lord
tbl@k.cs.cmu.edu