From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: npostavs@users.sourceforge.net Newsgroups: gmane.emacs.bugs Subject: bug#25355: 26.0.50; Provide function to non-destructively replace buffer contents Date: Wed, 04 Jan 2017 08:38:15 -0500 Message-ID: <87bmvn54jc.fsf@users.sourceforge.net> References: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1483537530 31584 195.159.176.226 (4 Jan 2017 13:45:30 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 4 Jan 2017 13:45:30 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) Cc: 25355@debbugs.gnu.org To: Philipp Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jan 04 14:45:25 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1cOlsZ-0007ZW-LN for geb-bug-gnu-emacs@m.gmane.org; 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Wed, 04 Jan 2017 05:37:13 -0800 (PST) Original-Received: from zony ([45.2.7.65]) by smtp.googlemail.com with ESMTPSA id g86sm18089848iod.31.2017.01.04.05.37.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 04 Jan 2017 05:37:13 -0800 (PST) In-Reply-To: (Philipp's message of "Wed, 04 Jan 2017 13:45:32 +0100") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:127733 Archived-At: severity 25355 wishlist quit Philipp writes: > There are many tools (e.g. auto-formatters) that take buffer contents, > reformat them, and write the reformatted output somewhere. However, > there is no good way how to apply the modified output to the source > buffer. The naive way (erasing and re-inserting the buffer contents) > loses point and markers. Therefore there should be a function > (e.g. `replace-buffer-contents') that calculates a minimal diff between > the old and the new contents and uses editing operations (insert, > delete, etc.) to apply the diff. Ideally this would be done without any > external tools (e.g. 'diff'). This is pretty similar (though not identical) to https://debbugs.gnu.org/cgi/bugreport.cgi?bug=18.