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Fri, 29 Sep 2023 00:12:08 -0700 (PDT) Original-Received: from amdahl30 ([2a01:e0a:253:fe0:2ef0:5dff:fed2:7b49]) by smtp.gmail.com with ESMTPSA id g17-20020a7bc4d1000000b003fe2a40d287sm800356wmk.1.2023.09.29.00.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Sep 2023 00:12:08 -0700 (PDT) In-Reply-To: <86o7huvjrh.fsf@mail.linkov.net> (Juri Linkov's message of "Fri, 22 Sep 2023 09:40:42 +0300") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:271469 Archived-At: Juri Linkov writes: >> FWIW, I would invite motivated hackers to check out magit-section and >> see if outline-mode could be taught a new "folding style" that would use >> the same folding principles. My own wandering through the EIEIO maze >> has been too brief to yield anything useful, but AFAICT the salient >> points are: >> >> * setting the 'invisible overlay's BEG at the start of the "section >> body" (after the heading's newline), >> >> * storing bookkeeping information (such as this beginning position) in a >> 'magit-section property applied to the heading, so that >> magit-section-show can retrieve that information when invoked by the >> user with point on that heading. >> >> I would imagine outline.el could grow a user option to adjust overlay >> boundaries this way, so the heading's newline would remain visible, and >> so would any :extend property on that newline=E2=80=A6 although perhaps = I'm >> missing some key differences between outline-mode and magit-section-mode >> that may derail this train of thought. > > I tried, but the conclusion was that this requires changes in the display= engine. Could you expand on what exactly you tried, and what limitations you faced? (Apologies if you went over this somewhere else and I missed it) My point was that magit-section exists right now, with no changes to the display engine, with the exact feature set of outline.el *and* the ability to keep heading faces extended after folding sections. So, unless I've missed a crucial difference between the two libraries, I don't see why outline.el could not "learn new tricks". (FWIW magit-section advertises itself as "sections for read-only buffers", but if there's something in there that could not be made to work for writable buffers, I have not found it yet)