From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Suggestion: Add discussion of input focus handling to select-window; add select-frame-window Date: Tue, 12 Dec 2017 16:57:28 -0500 Message-ID: References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1513115896 28295 195.159.176.226 (12 Dec 2017 21:58:16 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 12 Dec 2017 21:58:16 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Dec 12 22:58:13 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eOsZ2-00078L-1s for ged-emacs-devel@m.gmane.org; Tue, 12 Dec 2017 22:58:12 +0100 Original-Received: from localhost ([::1]:60671 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOsZ9-0003dr-3v for ged-emacs-devel@m.gmane.org; Tue, 12 Dec 2017 16:58:19 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:36097) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOsYY-0003dk-ME for emacs-devel@gnu.org; Tue, 12 Dec 2017 16:57:43 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eOsYT-0000yy-KV for emacs-devel@gnu.org; Tue, 12 Dec 2017 16:57:42 -0500 Original-Received: from [195.159.176.226] (port=44819 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eOsYT-0000y9-DP for emacs-devel@gnu.org; Tue, 12 Dec 2017 16:57:37 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1eOsYJ-00059D-HD for emacs-devel@gnu.org; Tue, 12 Dec 2017 22:57:27 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 24 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:Yc53WR07hfixtTtKMwJoVCOk3d8= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:220967 Archived-At: > ​Hyperbole has a feature that lets you either drag a dired item (or > other item type) to another frame (input switches to that frame) or > throw the dired item to another frame (input stays in the same frame). > The throw command calls the drag command to reuse its logic, since it > is fairly involved and doesn't make sense to duplicate, but then needs > to restore the focus to original frame. Wouldn't it make sense to solve this by doing it the other around: implement drag on top of throw? The kind of "undo" we get from save-excursion and friends is very handy and powerful, but in many cases "undoing" is either very difficult or even impossible (e.g. save-window-excursion can undo changes to the current frame, but there is simply no way to implement the equivalent for frames, because once a frame is created the user has seen it (and in my case, had to position it with his mouse) and once a frame has been deleted you've lost some of the information attached to it which Emacs can't recreate because it's specific to your particular window-manager). When you request to change the focus, the window-manager may immediately execute some user-visible action, so you can't fully "undo" it. Stefan