From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Heime Newsgroups: gmane.emacs.help Subject: Re: Matching labels with buttons Date: Mon, 15 Jul 2024 21:29:38 +0000 Message-ID: <9zCSPBgOs4sWfvgWJ8YPTCCX0MCgtllMZ1mtZ4Y6CyxxfQA7fmwaTTfOYigIm0X6BHsBp--fmt7MHVReMf7A6vIsFR6zZh1Pf9rK1KT5eZY=@protonmail.com> References: <87r0bug978.fsf@rub.de> <87msmig6lz.fsf@rub.de> <87ikx6g49y.fsf@rub.de> <72n913q3Tv6RlKwXsHxBXRlGEwuYia37iCUcLQg-7S8aHg_qVwE6JhXMRN3wk1IajDCeqvM7QD9yv5EM9yF75G8zwWyPb_VpQAqf_GqasdM=@protonmail.com> <87wmlmwdvo.fsf@gmx.net> 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="19788"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Heime via Users list for the GNU Emacs text editor To: Stephen Berman Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 15 23:30:29 2024 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 1sTTHA-0004w2-IM for geh-help-gnu-emacs@m.gmane-mx.org; 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b=siynH5ZwGNyiWeszEXphKBaBEoas64ndStosBhgOUeYKmyVAW9+AYaKX68VCXU3c1 EwKrY69puagEyoMjRht5QEWo1BlGXMRE5m2sXII+jfaWB610526KNu9BhJxVqlJF+q aRr4EKV4O6ScDnZpL2IBMoVfdZPLwqPQ2BuIqoyyZ7ycR7UxSwSB89FducFx35zpXp tctbFVxkuL4WzdQHwS+hbtwiuP7x7YLP1DfufzG22lWrEqQNCu6mv5eg1euOOnIL9A nlBGdbMLJjvtQ0cc/6TQlXeohs/x7IOVQtbrQkFlygmprTj3fcamg5WCVJR6A8e4Iz u+ubzfNWzrrwQ== In-Reply-To: <87wmlmwdvo.fsf@gmx.net> Feedback-ID: 57735886:user:proton X-Pm-Message-ID: 144f753e0ef4cb8180db0916f335dd2722c66d35 Received-SPF: pass client-ip=185.70.40.140; envelope-from=heimeborgia@protonmail.com; helo=mail-40140.protonmail.ch X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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:147233 Archived-At: On Tuesday, July 16th, 2024 at 9:20 AM, Stephen Berman wrote: > On Mon, 15 Jul 2024 17:25:42 +0000 Heime heimeborgia@protonmail.com wrote= : >=20 > > On Tuesday, July 16th, 2024 at 4:24 AM, Heime heimeborgia@protonmail.co= m wrote: > >=20 > > > On Tuesday, July 16th, 2024 at 1:42 AM, Stephen Berman > > > stephen.berman@gmx.net wrote: > > >=20 > > > > On Mon, 15 Jul 2024 12:58:05 +0000 Heime heimeborgia@protonmail.com= wrote: > > > >=20 > > > > > Sent with Proton Mail secure email. > > > > >=20 > > > > > On Tuesday, July 16th, 2024 at 12:52 AM, Stephen Berman > > > > > stephen.berman@gmx.net wrote: > > > > >=20 > > > > > > On Mon, 15 Jul 2024 12:35:53 +0000 Heime heimeborgia@protonmail= .com wrote: > > > > > >=20 > > > > > > > On Monday, July 15th, 2024 at 11:56 PM, Stephen Berman > > > > > > > stephen.berman@gmx.net wrote: > > > > > > >=20 > > > > > > > > On Mon, 15 Jul 2024 11:25:28 +0000 Heime > > > > > > > > heimeborgia@protonmail.com wrote: > > > > > > > >=20 > > > > > > > > > Sent with Proton Mail secure email. > > > > > > > > >=20 > > > > > > > > > On Monday, July 15th, 2024 at 11:17 PM, Heime > > > > > > > > > heimeborgia@protonmail.com wrote: > > > > > > > > >=20 > > > > > > > > > > I want to match cases such as > > > > > > > > > >=20 > > > > > > > > > > Label [-] > > > > > > > > > >=20 > > > > > > > > > > Have constructed the following regexp, but it does not = match > > > > > > > > > > the above > > > > > > > > > >=20 > > > > > > > > > > "\\(.\\)\\(\\s-\\[\\-\\]\\s-\\)" > > > > > > > > > >=20 > > > > > > > > > > I aw using > > > > > > > > > >=20 > > > > > > > > > > (when (string-match "\\(.\\)\\(\\s-\\[\\-\\]\\s-\\)" te= xt) > > > > > > > > >=20 > > > > > > > > > In the code I have > > > > > > > > >=20 > > > > > > > > > (if (string-match "\\(\\s-\\[\\-\\]\\s-\\)\\(.*\\)" label= ) ; [-] LB > > > > > > > > >=20 > > > > > > > > > (progn > > > > > > > > > (setq bt (match-string 1 label)) > > > > > > > > > (setq lb (match-string 2 label)) > > > > > > > > > (setq result > > > > > > > > > (concat bt (propertize lb 'face '(:foreground "red"))))) > > > > > > > > >=20 > > > > > > > > > (when (string-match "\\(.\\)\\(\\s-\\[\\-\\]\\s-*\\)" lab= el) ; LB [-] > > > > > > > > >=20 > > > > > > > > > (setq lb (match-string 1 label)) > > > > > > > > > (setq bt (match-string 2 label)) > > > > > > > > > (setq result > > > > > > > > > (concat (propertize lb 'face '(:foreground "red")) bt))) > > > > > > > > >=20 > > > > > > > > > Doing some tests with > > > > > > > > >=20 > > > > > > > > > "OFF [-]" > > > > > > > > >=20 > > > > > > > > > keeps matching the first string-match > > > > > > > >=20 > > > > > > > > That's because your regexp isn't anchored, so string-match = succeeds if > > > > > > > > it finds a match anywhere in the string passed to it. To av= oid this, > > > > > > > > start the regexp with "\\`", which anchors it to the start = of the string > > > > > > > > being matched against; see (info "(elisp) Regexp Backslash"= ). > > > > > > > >=20 > > > > > > > > Steve Berman > > > > > > >=20 > > > > > > > I would like to have two regex expressions, one to match only= " [-] > > > > > > > LABEL " and > > > > > > > another to match only " LABEL [-] ". With any number of white= space. > > > > > > >=20 > > > > > > > Can one use "^" ? Or is "\\`" preferred ? > > > > > >=20 > > > > > > If you are always matching against a string, e.g. just using > > > > > > string-match, then IIUC "^" and "\\`" give the same results. If= you are matching against test in a buffer, e.g. with re-search-forward, lo= oking-at etc., then they can differ: "^" matches the beginning the the line= containing the matched string, "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\`" the > > > > > > beginning of the string > > > > > > itself, regardless of where in the line it is (at point-min the= results > > > > > > are the same). > > > > > >=20 > > > > > > > And can one use "[[:space:]]" rather > > > > > > > than "\\s-" ? Which is preferred ? > > > > > >=20 > > > > > > IIUC these both give the same results. > > > > > >=20 > > > > > > Steve Berman > > > > >=20 > > > > > Would I introduce \\` before the first grouping > > > > >=20 > > > > > "\\`\\(\\s-\\[\\-\\]\\s-\\)\\(.*\\)" > > > >=20 > > > > Since "\\`" matches the empty string, I don't think it matters whet= her > > > > it's inside or outside of the group. But since in this case it's > > > > anchoring the entire regexp, it seems conceptually preferable to ke= ep it > > > > outside (in contrast, e.g., to the case where the regexp is a > > > > disjunction and you only want to anchor one of the disjuncts). > > > >=20 > > > > > How would I print \\` in a docstring ? > > > >=20 > > > > You have to escape the "`": \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\=3D` (n= ot \\=3D\\`). > > > >=20 > > > > Steve Berman > > >=20 > > > I also have to handle the case of " LABEL [-] " with a different rege= x, so I can > > > distinguish between " [-] LABEL " and " LABEL [-] ". > >=20 > > In the latter case I want to match [-] at the end with any trailing spa= ces. >=20 >=20 > With your original code amended by anchoring the first regexp as I > suggested, I think it handles both cases you want; at least the brief > tests I tried worked. If you don't get the results you want, please > show the complete code you're using and examples where it fails. >=20 > Steve Berman Have used=20 "\\`\\(\\s-*\\[\\-\\]\\s-*\\)\\(.*\\)" for " [-] LABEL " and "\\(.*\\)\\(\\s-*\\[\\-\\]\\s-*\\)\\'" for " LABEL [-] "