From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Correct way to implement `pixel-point-and-height-at-unseen-line'? Date: Mon, 13 Dec 2021 03:20:36 +0100 Message-ID: <87fsqx4557.fsf@zoho.eu> References: <87pmq1wag9.fsf.ref@yahoo.com> <87pmq1wag9.fsf@yahoo.com> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="39379"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:oWlVKK/5+NNEQl6m03HnrvTiF4c= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Dec 13 03:21:38 2021 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 1mwayA-000A5E-Jl for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 13 Dec 2021 03:21:38 +0100 Original-Received: from localhost ([::1]:51460 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mway9-0006zC-1g for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 12 Dec 2021 21:21:37 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:54138) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mwaxK-0006yz-3U for help-gnu-emacs@gnu.org; Sun, 12 Dec 2021 21:20:46 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:41288) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mwaxI-00065F-E2 for help-gnu-emacs@gnu.org; Sun, 12 Dec 2021 21:20:45 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mwaxF-00090v-Kj for help-gnu-emacs@gnu.org; Mon, 13 Dec 2021 03:20:41 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.248, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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" Xref: news.gmane.io gmane.emacs.help:134955 Archived-At: Po Lu wrote: > I don't know how to make > `pixel-point-and-height-at-unseen-line' work correctly: if > I use `line-pixel-height', it will only report the height > the first individual line inside a display string if there > is one above window start, but if I use > `window-text-pixel-size', I have to determine the region to > measure, which is quite troublesome. > > For example, window start is often not the beginning of > a visual line `window-start', `beginning-of-visual-line' ... You can post the code instead ... that way you don't have to remove the dashes. > This works okay until there is a `line-prefix' property at > window start: in this case, window start is the beginning of > a visual line, but it does not display at the beginning of > the line, which means `window-text-pixel-size' will add the > height of the current line to that of the previous line. > I will add a workaround to pixel-scroll.el, but there must > be a cleaner way to implement this. Sounds pretty clean to me but difficult to say since you are not posting the actual code. -- underground experts united https://dataswamp.org/~incal