From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: make a drawing with Emacs Date: Thu, 03 Sep 2020 12:59:01 -0400 Message-ID: References: <20200901145854.GF15433@tuxteam.de> <87sgbzsx4q.fsf@logand.com> <87ft7zs48u.fsf@logand.com> <874koehonj.fsf@logand.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24531"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:4Q4LAcTG4TMTrxpIZsvjFL3axy4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Sep 03 18:59:29 2020 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 1kDsa9-0006Il-BZ for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 03 Sep 2020 18:59:29 +0200 Original-Received: from localhost ([::1]:50402 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kDsa8-0002WJ-Ed for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 03 Sep 2020 12:59:28 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48488) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kDsZr-0002Vx-8x for help-gnu-emacs@gnu.org; Thu, 03 Sep 2020 12:59:11 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:43200 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kDsZp-00075q-LC for help-gnu-emacs@gnu.org; Thu, 03 Sep 2020 12:59:10 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kDsZm-0005ql-P7 for help-gnu-emacs@gnu.org; Thu, 03 Sep 2020 18:59:06 +0200 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/03 12:43:49 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=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: 2.1.23 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:123929 Archived-At: >>> 1) It is not clear upfront, when it does not work, as demonstrated with >>> svg-image vs svg-print. >>> This is general problem with foreign dependencies. >> I believe svg-image is the only exception and it's an intuitive one at It seems `svg-insert-image` is another exception. > Sorry it wasn't intuitive to me as I don't know emacs internals (yet?). ;-) >> since it is used to create an internal Emacs image object whose only >> use is to display the image inside an Emacs buffer. > There seem to be other uses as well, e.g. to save the image (image-save > function). Maybe other uses like create a screenshot? That doesn't seem related to `svg.el` which focuses on generating the XML representation of an SVG image (with one or two extra help functions like `svg-image` which also tries to help *display* that image). Searching for `save` only finds a single match (and it's for `save-excursion` and it's not even in the code but in a comment). > image.el also has some questionable constraints. `svg.el` is unrelated to `image.el` (except via `svg-image`, AFAIK). >> Or maybe you can improve the package instead of writing a new one. >> Code is sometimes called "software" because presumably it's more >> malleable than "hardware". > Maybe. svg.el seems to be 4 years old and likely has many users > already. Probably not "many", but then again, the more users it has, the higher the benefit of improving it rather than writing another one. > The fake keyword args as rest args plist was a bad choice 4 > years ago which will be hard to fix. What would be the right way to do > this if not writing svg2.el? Perhaps to implement proper keyword > support in Elisp? The answer probably depends on exactly how else you want to handle those properties. I don't know what "proper keyword support" you're thinking of, but if you're thinking of Common List keywords, then you can simply change `defun` into `cl-defun` and then use `&key`. BTW, if you're only concerned about the Eldoc and `C-h o` info, then you can also just provide the more precise info in the docstring e.g.: (defun svg-create (width height &rest args) "Create a new, empty SVG image with dimensions WIDTH x HEIGHT. ARGS can be used to provide `stroke' and `stroke-width' parameters to any further elements added. \(fn WIDTH HEIGHT &key STROKE STROKE-WIDTH)" ...) -- Stefan