From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Christoph Arenz Newsgroups: gmane.emacs.bugs Subject: bug#43587: move-to-column behaves differently when text has invisible property Date: Tue, 29 Sep 2020 17:56:45 +0200 Message-ID: References: <7e243d01-6d98-bda3-94bf-c0841a32f4ac@web.de> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="------------B65CB00DA4619B3355098D58" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15615"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 To: 43587@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Sep 29 17:58:55 2020 Return-path: Envelope-to: geb-bug-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 1kNI1m-0003uH-Ur for geb-bug-gnu-emacs@m.gmane-mx.org; 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charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Digging deeper into bug 43587, it seems to be related to move-to-column behaving slightly different when the text in a line has the invisible property set. Here is how to recreate. According to the documentation for move-to-column, I would not expect any difference between the two lines: > Optional second argument FORCE non-nil means if COLUMN is in the middle of a tab character, change it to spaces. For the first line, the tab has not been changed to spaces... Am I overlooking something? Kind Regards, Christoph (progn =C2=A0 (switch-to-buffer "indent-test.txt") =C2=A0 (erase-buffer) =C2=A0 (insert "\tLine starting with INVISIBLE text after TAB\n") =C2=A0 (insert "\tLine starting with visible text after TAB\n") =C2=A0 (insert "\nUsing move-to-column to move 'into' TAB, using the FORC= E parameter on both lines\n") =C2=A0 (whitespace-mode 1) =C2=A0 (add-text-properties 2 21 '(invisible t)) =C2=A0 (beginning-of-buffer) =C2=A0 (move-to-column 7 t) =C2=A0 (forward-line) =C2=A0 (move-to-column 7 t)) --------------B65CB00DA4619B3355098D58 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable

Digging deeper into bug 43587, it seems to be related to move-to-column behaving slightly different when the text in a line has the invisible property set.

Here is how to recreate. According to the documentation for move-to-column, I would not expect any difference between the two lines:

> Optional second argument FORCE non-nil means if COLUMN is in the middle of a tab character, change it to spaces.

For the first line, the tab has not been changed to spaces...

Am I overlooking something?

Kind Regards,
Christoph

(progn
=C2=A0 (switch-to-buffer "indent-test.txt")
=C2=A0 (erase-buffer)
=C2=A0 (insert "\tLine starting with INVISIBLE text after TAB\n")<= br> =C2=A0 (insert "\tLine starting with visible text after TAB\n") =C2=A0 (insert "\nUsing move-to-column to move 'into' TAB, using t= he FORCE parameter on both lines\n")
=C2=A0 (whitespace-mode 1)
=C2=A0 (add-text-properties 2 21 '(invisible t))
=C2=A0 (beginning-of-buffer)
=C2=A0 (move-to-column 7 t)
=C2=A0 (forward-line)
=C2=A0 (move-to-column 7 t))

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