From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Spencer Baugh Newsgroups: gmane.emacs.devel Subject: Allowing completion sources to customize completion display Date: Wed, 22 Nov 2023 18:05:04 -0500 Message-ID: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29429"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: emacs-devel@gnu.org Cancel-Lock: sha1:9KMFmCEEn7mDoZpIuEad6Wt0Cvs= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Nov 23 07:02:41 2023 Return-path: Envelope-to: ged-emacs-devel@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 1r62nR-0007VI-Mm for ged-emacs-devel@m.gmane-mx.org; Thu, 23 Nov 2023 07:02:41 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r62my-0001AE-1v; Thu, 23 Nov 2023 01:02:12 -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 1r5wHU-00040i-H5 for emacs-devel@gnu.org; Wed, 22 Nov 2023 18:05:16 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r5wHS-0002KC-6x for emacs-devel@gnu.org; Wed, 22 Nov 2023 18:05:16 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1r5wHQ-0007il-Dw for emacs-devel@gnu.org; Thu, 23 Nov 2023 00:05:12 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@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=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 23 Nov 2023 01:01:58 -0500 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:313140 Archived-At: If I have multiple sources for completion active at once, I might prefer different completion sources to be displayed differently. For example, if a completion source returns individual symbols, displaying the symbols in the *Completions* buffer seems good. So the default completion-in-region-function is good. But if a completion source returns multi-line blocks of text, I might want to see those blocks of text displayed in context in the buffer, rather than in a separate buffer. Perhaps I'd see only the first completion candidate displayed in-buffer, and have some key bindings which let me cycle between them. The exact details of the UI aren't important, just that it's different from what I want for symbol completion. So I'd set completion-in-region-function to something different. I have completion-at-point-functions='(symbol-completion block-completion), so if symbol-completion returns nil then I get block-completion instead - exactly what I want. But the same completion-in-region-function and UI has to be used regardless of whether I'm getting symbol-completion or block-completion - I don't see a way to change completion-in-region-function based on the source. Maybe we should add one? Some possibilities: - Maybe completion table metadata could just include a completion-in-region-function to use? - Maybe completion-category-overrides could change completion-in-region-function based on the category? - Maybe something else entirely?