From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: How to detect words being added and removed to a buffer in a minor mode? Date: Mon, 21 Nov 2022 18:17:14 +0100 Message-ID: <87tu2scjmt.fsf@mbork.pl> References: <87zgckhcit.fsf@ucl.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10737"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.1.0; emacs 29.0.50 Cc: Eric S Fraga , help-gnu-emacs@gnu.org To: Jean Louis Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Nov 21 18:18:13 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oxAQv-0002U2-C5 for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 21 Nov 2022 18:18:13 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oxAQI-00067F-F8; Mon, 21 Nov 2022 12:17:34 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oxAQG-00064c-3u for help-gnu-emacs@gnu.org; Mon, 21 Nov 2022 12:17:32 -0500 Original-Received: from mail.mojserwer.eu ([195.110.48.8]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oxAQE-0002UV-04 for help-gnu-emacs@gnu.org; Mon, 21 Nov 2022 12:17:31 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 1946B2271594; Mon, 21 Nov 2022 18:17:20 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RZy1Ghu12Qbg; Mon, 21 Nov 2022 18:17:15 +0100 (CET) Original-Received: from localhost (83.21.58.31.ipv4.supernova.orange.pl [83.21.58.31]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 1CC832271588; Mon, 21 Nov 2022 18:17:15 +0100 (CET) In-reply-to: Received-SPF: pass client-ip=195.110.48.8; envelope-from=mbork@mbork.pl; helo=mail.mojserwer.eu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:141085 Archived-At: On 2022-11-21, at 11:08, Jean Louis wrote: > * Eric S Fraga [2022-11-21 12:40]: >> On Saturday, 19 Nov 2022 at 20:44, Dmitrii Pisarenko wrote: >> > 1. How can I create an "event listener" (sorry for the non-Emacsian >> > terminology) which would be called whenever the user types something >> > in the buffer? >>=20 >> Na=C3=AFvely (i.e. I may be totally ignorant of a proper solution), ther= e is >> post-command-hook which can be used to process every single key event. > > There are 2 conditions here, one is that user wish to see the number > of words visualy, other is that one wants to compare that once editing > is finished. > > One need not see every single word counted. What if user enters 500 > words at once, then it would be futil to slow down the process until > every single word has been counted. > > It implies, one could invoke function with number of words each in a > while.=20 > > In that case, one could use this function: > > run-with-timer is an interactive byte-compiled Lisp function in > =E2=80=98timer.el=E2=80=99. > > (run-with-timer SECS REPEAT FUNCTION &rest ARGS) I would rather look at `run-with-idle-timer'. Also, there are `count-words-region' and `count-words'. I'm not sure what the differences are, you might want to look at their docstrings and/or code. Would a mode which displays the number of words in the current buffer whenever you stop typing for a few seconds be enough? (I am not sure how exactly you want to obtain the "number of words typed in today".) Hth, --=20 Marcin Borkowski http://mbork.pl