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Content preview: Tags: patch This feature prettify the page separator character (^L) with a horizontal line (to end of buffer) only if the character is at beginning of line. Unlike popular packages like page-break-lines and form-feed(-st), this one is written in C and does not present performance problems (I hope). Content analysis details: (1.2 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2001:470:142:0:0:0:0:17 listed in] [list.dnswl.org] 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (eg642616[at]gmail.com) -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (eg642616[at]gmail.com) 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 0.2 (/) --=-=-= Content-Type: text/plain Tags: patch This feature prettify the page separator character (^L) with a horizontal line (to end of buffer) only if the character is at beginning of line. Unlike popular packages like page-break-lines and form-feed(-st), this one is written in C and does not present performance problems (I hope). This package tries to be close to page-break-lines and be an alternative to make-separator-line. This partially works, however there are a few bugs that I can't find a solution for: - It won't display the characters inserted in front. I want to make it similar to display-fill-column, that only insert the horizontal line character if the row is empty. - For some reason it inserts newlines after inserting the character. - The highlighting stops when inserting or deleting newlines from previous or next line. I would like to hear your suggestions. Thanks. --=-=-= Content-Type: text/patch Content-Disposition: attachment; filename=0001-Prettify-page-separators.-bug.patch >From 1e058cc212fd5b46b2aed60b3ef3846f7a89bb15 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?El=C3=ADas=20Gabriel=20P=C3=A9rez?= Date: Fri, 4 Apr 2025 22:17:23 -0600 Subject: [PATCH] Prettify page separators. (bug#) Prettify page separator characters (^L) with a horizontal line. * src/xdisp.c (get_next_display_element): TODO: --- src/xdisp.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/src/xdisp.c b/src/xdisp.c index c396b213b92..9d5056d2bce 100644 --- a/src/xdisp.c +++ b/src/xdisp.c @@ -8430,6 +8430,34 @@ get_next_display_element (struct it *it) int lface_id = 0; int escape_glyph; + if (c == '\f' && it->current_x == it->first_visible_x) + { + const int save_face_id = it->face_id; + const int save_char = it->char_to_display; + const int save_current_x = it->current_x; + const int save_ascent = it->ascent; + const int save_descent = it->descent; + + face_id = + merge_faces (it->w, Qtrailing_whitespace, 0, it->face_id); + XSETINT (it->ctl_chars[0], 0); + ctl_len = 0; + + it->char_to_display = '-'; + it->face_id = face_id; + for ( ; it->current_x - it->end_charpos <= it->last_visible_x; it->current_x++) + { + PRODUCE_GLYPHS (it); + } + + it->current_x = save_current_x; + it->face_id = save_face_id; + it->char_to_display = save_char; + it->ascent = save_ascent; + it->descent = save_descent; + goto display_control; + } + /* Handle control characters with ^. */ if (ASCII_CHAR_P (c) && it->ctl_arrow_p) -- 2.49.0 --=-=-= Content-Type: text/plain -- - E.G via GNU Emacs and Org. --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Sat Apr 05 03:40:41 2025 Received: (at 77544) by debbugs.gnu.org; 5 Apr 2025 07:40:41 +0000 Received: from localhost ([127.0.0.1]:41332 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u0y8u-0002Rl-NL for submit@debbugs.gnu.org; Sat, 05 Apr 2025 03:40:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43614) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u0y8r-0002RS-OQ for 77544@debbugs.gnu.org; Sat, 05 Apr 2025 03:40:38 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u0y8m-0002s5-Ax; Sat, 05 Apr 2025 03:40:32 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=iUpTfBMBcaii72JieraRiyPfkNwsOPHSzXOoGKuiJpM=; b=SnmKq/8RXtkwD+r/gW9S blfP7pn7FE+2hPYuFyvialMOPhyTXGsPOIXUnlR6FglNmW15BOAxhiaM3OwIIpaVJytsT2uSNc6yh /O5MXk07CrlRVjEjWyATuLLsVTWIf5M9eDJefV5fysspXgowCTmHQJ8qQtyrXqlbI72gSAL0Zl8sp y5dfzCjgDIp+vBLe8qJG90n+CByVjR1keRAaxLeHD+0E3/06VjeM/qYNoeb+8gM3bUdAsURC0HrOM S2nuSZeFAao1v19uAXSP7AWkywsHHFzvPU8ZRwEo2BEY7nUVvD4+blI8+pITaR8/rtxLRDN3Mrmp1 L37alYY9s3aFEg==; Date: Sat, 05 Apr 2025 10:40:25 +0300 Message-Id: <86ldsfxdhy.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= , =?utf-8?Q?Gerd_M=C3=B6llmann?= In-Reply-To: <87bjtbyzg1.fsf@gmail.com> (message from Elijah Gabe =?utf-8?Q?P=C3=A9rez?= on Fri, 04 Apr 2025 23:01:02 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Pérez > Date: Fri, 04 Apr 2025 23:01:02 -0600 > > This feature prettify the page separator character (^L) with > a horizontal line (to end of buffer) only if the character > is at beginning of line. > > Unlike popular packages like page-break-lines and form-feed(-st), this > one is written in C and does not present performance problems (I hope). > > This package tries to be close to page-break-lines and be an alternative > to make-separator-line. > > This partially works, however there are a few bugs that I can't find a > solution for: > > - It won't display the characters inserted in front. > I want to make it similar to display-fill-column, that only > insert the horizontal line character if the row is empty. > - For some reason it inserts newlines after inserting the character. > - The highlighting stops when inserting or deleting newlines from > previous or next line. > > I would like to hear your suggestions. Thanks, please see a fewe comments below. > --- a/src/xdisp.c > +++ b/src/xdisp.c > @@ -8430,6 +8430,34 @@ get_next_display_element (struct it *it) > int lface_id = 0; > int escape_glyph; > > + if (c == '\f' && it->current_x == it->first_visible_x) IMO, this condition is incorrect. You should test for the previous character being a newline. The it->first_visible_x condition will be wrong in a continuation line, when the window is hscrolled, and when display-line-numbers-mode is turned on, as well as in some other situations (line/wrap-prefix etc.). > + { > + const int save_face_id = it->face_id; > + const int save_char = it->char_to_display; > + const int save_current_x = it->current_x; > + const int save_ascent = it->ascent; > + const int save_descent = it->descent; > + > + face_id = > + merge_faces (it->w, Qtrailing_whitespace, 0, it->face_id); > + XSETINT (it->ctl_chars[0], 0); > + ctl_len = 0; > + > + it->char_to_display = '-'; > + it->face_id = face_id; > + for ( ; it->current_x - it->end_charpos <= it->last_visible_x; it->current_x++) This condition is also incorrect, IMO: it->current_x is the pixel coordinate, whereas it->end_charpos is a character position in the buffer, so you cannot meaningfully subtract them. Also, I think this will be incorrect when the window has display margins. The right way to figure out the usable width is to call the function window_box_width or window_box_right_offset. These wrong conditions are probably the reasons for at least part of the problems you see with this patch. > + { > + PRODUCE_GLYPHS (it); > + } I think it's not a good idea to call PRODUCE_GLYPHS inside get_next_display_element. And in any case, this implementation is unnecessarily complicated, because we should probably use the display vector instead. The only complication here is that the number of glyphs in the display vector cannot be the one you need, since we need to produce the number of glyphs according to the window width. So we will need some special flag in the iterator object to keep producing glyphs from the display vector until we hit the right edge of the window's text area. Alternatively, we could implement this entirely in the terminal-specific back-end of the display engine (xterm.c, w32term.c, etc.), where we could detect the "^L" glyph sequence and replace it with a horizontal line of a suitable width and thickness. That would allow us to produce a separator that is much better-looking than just showing a long line of dashes. In any case, this must be an optional feature, so we will need a user option to control it, by default off. Adding Gerd in case he has ideas, suggestions, or further comments. Thanks for working on this. 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[2003:e0:b71e:7700:b416:b1a5:f216:4327]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39c301a7225sm6284763f8f.26.2025.04.05.01.53.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Apr 2025 01:53:07 -0700 (PDT) From: =?utf-8?Q?Gerd_M=C3=B6llmann?= To: Eli Zaretskii Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. In-Reply-To: <86ldsfxdhy.fsf@gnu.org> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> Date: Sat, 05 Apr 2025 10:53:06 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77544 Cc: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= , 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Eli Zaretskii writes: > Adding Gerd in case he has ideas, suggestions, or further comments. Nothing to add to your comments ATM, but maybe an alternative idea: how about solving this with a new type of display property for drawing a horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or something to draw a line to the end of the display area? That would have the advantage that it would be a relatively locally confined change and would have no impact when not used, and hopefully little potential to break unrelated things when not used. One would have to have some Lisp though that puts the display property on form-feeds. From debbugs-submit-bounces@debbugs.gnu.org Sat Apr 05 06:33:43 2025 Received: (at 77544) by debbugs.gnu.org; 5 Apr 2025 10:33:43 +0000 Received: from localhost ([127.0.0.1]:41669 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u10qN-00026L-3L for submit@debbugs.gnu.org; Sat, 05 Apr 2025 06:33:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53288) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u10qK-000266-Oe for 77544@debbugs.gnu.org; Sat, 05 Apr 2025 06:33:41 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u10qF-0001bH-Bo; Sat, 05 Apr 2025 06:33:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=24oZ494Z9Ao5AHsrn22wHV1q3v+wac1AgXWVdd01edM=; b=px3ujuDeGqt3vAA82OE9 LYVAGGSlpmFHkTBVPfqviwQBnrpXrHlBX4VoeqvdqXu8ZaqPKjxaTC2OWpT2qv2Q87/EQZmUuuM+y huS/LKJmV5Ii5TtBBQW1maYXi4HQENWSBxIL/jJbvgSmwEoENv4fpxqTlWRx4+4Je2DsmR0a42qS+ MfzSNCFmAJu0Smgl9UoDv33J33wqtEarywUjkH0aFFWUPJi986qxfqOi7SO5lr++yB6G2utgdUCm7 UV2koqcFA15cYu6kjuYDaO6uS3dNVK8uA9/mxpSz668VaqwovwXKQyHGqxHg/qz4PeZSYV8EXGPD5 o3g8bU/ptMTQcA==; Date: Sat, 05 Apr 2025 13:33:31 +0300 Message-Id: <86mscux5hg.fsf@gnu.org> From: Eli Zaretskii To: Gerd =?utf-8?Q?M=C3=B6llmann?= In-Reply-To: (message from Gerd =?utf-8?Q?M?= =?utf-8?Q?=C3=B6llmann?= on Sat, 05 Apr 2025 10:53:06 +0200) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: eg642616@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Gerd Möllmann > Cc: Elijah Gabe Pérez , > 77544@debbugs.gnu.org > Date: Sat, 05 Apr 2025 10:53:06 +0200 > > Eli Zaretskii writes: > > > Adding Gerd in case he has ideas, suggestions, or further comments. > > Nothing to add to your comments ATM, but maybe an alternative idea: how > about solving this with a new type of display property for drawing a > horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or > something to draw a line to the end of the display area? That would have > the advantage that it would be a relatively locally confined change and > would have no impact when not used, and hopefully little potential to > break unrelated things when not used. Thanks, sounds like a good idea. > One would have to have some Lisp though that puts the display property > on form-feeds. Right. Maybe a minor mode? Or an optional feature of whitespace-mode? 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In-Reply-To: <86ldsfxdhy.fsf@gnu.org> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> Date: Sat, 05 Apr 2025 11:57:42 -0600 Message-ID: <877c3yebjd.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/31.0.50 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" X-Spam-Score: 2.7 (++) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Eli Zaretskii writes: >> --- a/src/xdisp.c >> +++ b/src/xdisp.c >> @@ -8430,6 +8430,34 @@ get_next_display_element (struct it *it) >> int lface_id = 0; >> int escape_glyph; >> >> + if (c == '\f' && it->current_x == it->fir [...] Content analysis details: (2.7 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (eg642616[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (eg642616[at]gmail.com) -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2001:4860:4864:20:0:0:0:41 listed in] [list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 2.4 HTML_OBFUSCATE_20_30 BODY: Message is 20% to 30% HTML obfuscation X-Debbugs-Envelope-To: 77544 Cc: Gerd =?utf-8?Q?M=C3=B6llmann?= , 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 1.7 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. 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Content preview: Eli Zaretskii writes: >> --- a/src/xdisp.c >> +++ b/src/xdisp.c >> @@ -8430,6 +8430,34 @@ get_next_display_element (struct it *it) >> int lface_id = 0; >> int escape_glyph; >> >> + if (c == '\f' && it->current_x == it->fir [...] Content analysis details: (1.7 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2001:4860:4864:20:0:0:0:41 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (eg642616[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (eg642616[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 2.4 HTML_OBFUSCATE_20_30 BODY: Message is 20% to 30% HTML obfuscation -1.0 MAILING_LIST_MULTI Multiple indicators imply a widely-seen list manager --=-=-= Content-Type: multipart/alternative; boundary="==-=-=" --==-=-= Content-Type: text/plain Eli Zaretskii writes: >> --- a/src/xdisp.c >> +++ b/src/xdisp.c >> @@ -8430,6 +8430,34 @@ get_next_display_element (struct it *it) >> int lface_id = 0; >> int escape_glyph; >> >> + if (c == '\f' && it->current_x == it->first_visible_x) > > IMO, this condition is incorrect. You should test for the previous > character being a newline. The it->first_visible_x condition will be > wrong in a continuation line, when the window is hscrolled, and when > display-line-numbers-mode is turned on, as well as in some other > situations (line/wrap-prefix etc.). > >> + { >> + const int save_face_id = it->face_id; >> + const int save_char = it->char_to_display; >> + const int save_current_x = it->current_x; >> + const int save_ascent = it->ascent; >> + const int save_descent = it->descent; >> + >> + face_id = >> + merge_faces (it->w, Qtrailing_whitespace, 0, it->face_id); >> + XSETINT (it->ctl_chars[0], 0); >> + ctl_len = 0; >> + >> + it->char_to_display = '-'; >> + it->face_id = face_id; >> + for ( ; it->current_x - it->end_charpos <= it->last_visible_x; it->current_x++) > > This condition is also incorrect, IMO: it->current_x is the pixel > coordinate, whereas it->end_charpos is a character position in the > buffer, so you cannot meaningfully subtract them. Also, I think this > will be incorrect when the window has display margins. > > The right way to figure out the usable width is to call the function > window_box_width or window_box_right_offset. > > These wrong conditions are probably the reasons for at least part of > the problems you see with this patch. I'll take it into account. Thanks. >> + { >> + PRODUCE_GLYPHS (it); >> + } > > I think it's not a good idea to call PRODUCE_GLYPHS inside > get_next_display_element. I originally wanted to put this in display_line, however, get_next_display_element was overriding the character face so i thought that adding it to get_next_display_element (where ^L is displayed) would be a better solution. > Alternatively, we could implement this entirely in the > terminal-specific back-end of the display engine (xterm.c, w32term.c, > etc.), where we could detect the "^L" glyph sequence and replace it > with a horizontal line of a suitable width and thickness. That would > allow us to produce a separator that is much better-looking than just > showing a long line of dashes. The dashes are temporal, I'm planning to add a variable that store the character to display (like display-fill-column-indicator-character). I don't think it would be better display a line instead a character, in that case, I would have preferred to use a face with a strike-through. This should work for both Terminal and GUI frames. > In any case, this must be an optional feature, so we will need a user > option to control it, by default off. Yeah, this will be buffer-local and have an user option (not minor mode) for enable/disable it (disabled by default), i didn't added the options yet because first i was testing if this works well, the same for the face used. --==-=-= Content-Type: text/html

Eli Zaretskii <eliz@gnu.org> writes:

— a/src/xdisp.c
+ b/src/xdisp.c
@@ -8430,6 8430,34 @@ getnextdisplayelement (struct it *it)
int lfaceid = 0;
int escapeglyph;

+ if (c = '\f' && it->current_x = it->firstvisiblex)

IMO, this condition is incorrect. You should test for the previous
character being a newline. The it->firstvisiblex condition will be
wrong in a continuation line, when the window is hscrolled, and when
display-line-numbers-mode is turned on, as well as in some other
situations (line/wrap-prefix etc.).

+ {
+ const int savefaceid = it->faceid;
+ const int savechar = it->chartodisplay;
+ const int savecurrentx = it->currentx;
+ const int saveascent = it->ascent;
+ const int savedescent = it->descent;
+
+ faceid =
+ mergefaces (it->w, Qtrailingwhitespace, 0, it->faceid);
+ XSETINT (it->ctlchars[0], 0);
+ ctllen = 0;
+
+ it->chartodisplay = '-';
+ it->faceid = faceid;
+ for ( ; it->currentx - it->endcharpos <= it->lastvisiblex; it->currentx+)

This condition is also incorrect, IMO: it->currentx is the pixel
coordinate, whereas it->endcharpos is a character position in the
buffer, so you cannot meaningfully subtract them. Also, I think this
will be incorrect when the window has display margins.

The right way to figure out the usable width is to call the function
windowboxwidth or windowboxrightoffset.

These wrong conditions are probably the reasons for at least part of
the problems you see with this patch.

I'll take it into account. Thanks.

+ {
+ PRODUCEGLYPHS (it);
+ }

I think it's not a good idea to call PRODUCEGLYPHS inside
getnextdisplayelement.

I originally wanted to put this in displayline, however,
getnextdisplayelement was overriding the character face so i thought
that adding it to getnextdisplayelement (where ^L is displayed)
would be a better solution.

Alternatively, we could implement this entirely in the
terminal-specific back-end of the display engine (xterm.c, w32term.c,
etc.), where we could detect the "L" glyph sequence and replace it
with a horizontal line of a suitable width and thickness. That would
allow us to produce a separator that is much better-looking than just
showing a long line of dashes.

The dashes are temporal, I'm planning to add a variable that store
the character to display (like display-fill-column-indicator-character).

I don't think it would be better display a line instead a character, in
that case, I would have preferred to use a face with a strike-through.

This should work for both Terminal and GUI frames.

In any case, this must be an optional feature, so we will need a user
option to control it, by default off.

Yeah, this will be buffer-local and have an user option (not minor mode)
for enable/disable it (disabled by default), i didn't added the options
yet because first i was testing if this works well, the same for the
face used.

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Gerd M=C3=B6llmann <gerd.moellmann@gmail.com> writes:

Nothing to add to your comments ATM, but maybe an alternative idea: ho= w
about solving this with a new type of display property for drawing a
horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or something to draw a line to the end of the display area? That would have the advantage that it would be a relatively locally confined change and
would have no impact when not used, and hopefully little potential to
break unrelated things when not used.

I like this idea.

One would have to have some Lisp though that puts the display property=
on form-feeds.

In this case I would move this code to Lisp instead of C.

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Eli Zaretskii <eliz@gnu.org> writes:

One would have to have some Lisp though that puts the display property
on form-feeds.

Right. Maybe a minor mode?

I think a minor mode would be better.

Or an optional feature of whitespace-mode?

I don't think whitespace-mode is related to this.

--==-=-=-- --=-=-= Content-Type: text/plain -- - E.G via GNU Emacs and Org. --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 01:06:38 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 05:06:38 +0000 Received: from localhost ([127.0.0.1]:45690 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1IDN-0001xI-OB for submit@debbugs.gnu.org; Sun, 06 Apr 2025 01:06:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47596) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u1IDL-0001x2-Hg for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 01:06:35 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u1IDF-0006QC-Ui; Sun, 06 Apr 2025 01:06:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=zOKYcdOeELqR6Dhr1NqTG4gx4C8Zp4nxv0gLq/+iT0k=; b=ris8lIiuwXQ2RSCqF21r iPllGb/5x313EBW8geUX+15L7/OH2BsjaL8osFS17Z+5148/k+lHGO4PMO8U3m9JJFIK3UyeYncgc H0B9mVXX/tsCU9G2TF/q30zegrm85f8pIhW9b1/gLwEOwbF9LxTLTD8dN/Kq6NaXdr6TtRjIlbWp8 gDuoPhEUXdlOzaCJkG9zSnv1bCe+vvIPDLPCL5nbzHbF9/92YMNyCBE47On8QoBUPubzhcyLhVaJg b9Uwh7ApQy0CnPfz/UftkWZF7FdNs8Fktg2LayNrmPt0Y3NrvErnsSHeVzknBW245NGdjJsm4vQSH SDI83hhZVU/lOQ==; Date: Sun, 06 Apr 2025 08:06:27 +0300 Message-Id: <86o6x9vpyk.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= In-Reply-To: <87zfgucwhp.fsf@gmail.com> (message from Elijah Gabe =?utf-8?Q?P=C3=A9rez?= on Sat, 05 Apr 2025 12:08:02 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Pérez > Cc: Eli Zaretskii , 77544@debbugs.gnu.org > Date: Sat, 05 Apr 2025 12:08:02 -0600 > > Gerd Möllmann writes: > > Nothing to add to your comments ATM, but maybe an alternative idea: how > about solving this with a new type of display property for drawing a > horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or > something to draw a line to the end of the display area? That would have > the advantage that it would be a relatively locally confined change and > would have no impact when not used, and hopefully little potential to > break unrelated things when not used. > > I like this idea. > > One would have to have some Lisp though that puts the display property > on form-feeds. > > In this case I would move this code to Lisp instead of C. A new kind of display property must be implemented in C. The rest of the code can be in Lisp. From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 01:07:20 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 05:07:20 +0000 Received: from localhost ([127.0.0.1]:45695 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1IE4-00025p-8M for submit@debbugs.gnu.org; Sun, 06 Apr 2025 01:07:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57960) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u1IE1-00024U-Oj for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 01:07:18 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u1IDw-0006SC-GD; Sun, 06 Apr 2025 01:07:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=s5m/VLT+nUnP06Tt2mQ8AYvYOniR0T4Sj8O2dRl1u7g=; b=fF3QQJ5pdKKhurc3hLb/ ffVa8wPWdIiXXi5O4RQ7p6JdyESqQ5tai1kPqPqfdIWEbpgXEYg320aQihQGBx5+6BIgymlaHCJF2 u+50fIZialFqV3TH+ASgTlRwxJWxARLJF5ufMGMNFvc8ZR59nwg+2a+XM0gxGoF7RRmmYSHfgHa5k Nxie7X92ZMqElHDzjTF2XGzZLhIG85uDD1RLeIJlnblTssXC9hv9G4gNbqWbZ8Nz6gCdK5XoFtCUF ZgKFOWZ+McCDCrjtBSMLU5TEX4qeYYrq2rIJ8A4rTvUz6icnrKQXVYbfL+Hlyh5E88uabdZmt2yzN xN7C2lVnm70xKQ==; Date: Sun, 06 Apr 2025 08:07:09 +0300 Message-Id: <86msctvpxe.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= In-Reply-To: <87v7ricw8p.fsf@gmail.com> (message from Elijah Gabe =?utf-8?Q?P=C3=A9rez?= on Sat, 05 Apr 2025 12:13:26 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <86mscux5hg.fsf@gnu.org> <87v7ricw8p.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Pérez > Cc: Gerd Möllmann , > 77544@debbugs.gnu.org > Date: Sat, 05 Apr 2025 12:13:26 -0600 > > Eli Zaretskii writes: > > One would have to have some Lisp though that puts the display property > on form-feeds. > > Right. Maybe a minor mode? > > I think a minor mode would be better. > > Or an optional feature of whitespace-mode? > > I don't think whitespace-mode is related to this. The form-feed ^L character is one of whitespace characters. From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 01:25:13 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 05:25:13 +0000 Received: from localhost ([127.0.0.1]:45708 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1IVM-0002vg-Rf for submit@debbugs.gnu.org; Sun, 06 Apr 2025 01:25:13 -0400 Received: from mail-qv1-xf44.google.com ([2607:f8b0:4864:20::f44]:57803) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1u1IVK-0002ul-DF for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 01:25:10 -0400 Received: by mail-qv1-xf44.google.com with SMTP id 6a1803df08f44-6e904f53151so28883576d6.3 for <77544@debbugs.gnu.org>; Sat, 05 Apr 2025 22:25:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1743917104; x=1744521904; darn=debbugs.gnu.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=Hg8867Z+c/o8MoH2eeiipLLB+R6xjeYnpEZEGLby1sE=; b=Sv84wLLk9tGiYGPEO6OPaZczBdtXjQMUiOQWTNNaWdfyc7/rZB3nRGwZM/moQbFB0T CFzHAYxh8f3ZaC9uD+orfQe5lEmlxAD0dOo9t6eilDDJyS9oI27RTjDTU2vU/U25dNRW oaez6OlPZRSMXMY2vC5NJsFqNm6sntQOKSHWiTUmkSWIi3RNhM8QsHN/6ikOHHI9zyoO PffbxYgt8Zfr2oa3TCdikji6jTZdNI2Bfn15kkG1g+wCBWFwfYyjEBLVM5undVWALBBO depvek/N0Hxe8zsh8/hg5Fl7YhUFHgzJrmnq8Gh6WdTqqBrqPcSOVJGcXaIzrxCCLg/+ aJ4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743917104; x=1744521904; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Hg8867Z+c/o8MoH2eeiipLLB+R6xjeYnpEZEGLby1sE=; b=FRFray0bMllY7A4deqbTY2AnctPmQweRLe0C/7GPB2THqoFMOk2plged4TqF8s52Pt 5mGicJ+/iCNZYrZVo5sEW//SJKWszLEsMW8Ll+5IJN62ebAJgy7nnpICCvr83+aV8196 l6o9RT41bg0rABjMt+fGmv79sb6nrXumUNkaPgU/39WtCclKMeolj2M95NBbRH89U3/9 HFYigzhLMiL47HCB2OvCNsQl1DPdCxypDtjAp8ZjHPXSMQmxwDLoG325O5Xy9W4MC6Kb lE6Y9N8Xaq9aRUG2fsUy/3He8s0j90mgicloq43NIU3l/JffvROUVqZZKHroz1SAc5sg Vufw== X-Forwarded-Encrypted: i=1; AJvYcCXGhqhLWVUDwN3TOt7llm2ZXKl+hefrva749kmnt5yQRelXhb3FlSij85Q5Xg56+stY1w/dSA==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxqFZDbS7/lzsFW7mvAkXD/EQhqm/u3htzLT18u+WqqhyusLg13 XHxe91xgWS06SnSehKfzBqJnMbOH4qZFM3kVSGA/cry9QStoSVMDWYO/Ec5rxFa426TbE0KxLIP F+8Y0YawA5+9l1HYeRzwx+5PnlYg= X-Gm-Gg: ASbGnct1hEO/2uzPz4zemmTggbpE70B5XlDs1agicUIK+3KJZhdbRiey7e2MEGpPB8v i3zp4L/9i2MCJD//CJGYW0KfUmVwEVb6veAiKZbMola1/YtpX01y5enZUgsTsf+HcnC/TSv3x2G kroJQ8e2vpXQUdQCHQlfg4yZ/GL09t+UfYUGHeAoelEHEd7qfWgR90DFPo X-Google-Smtp-Source: AGHT+IGP1qjY+5j+S/OO3eIZVn0gTjDEXMsC+EOUwsWJvOS4GoP7budtj3YHSirUggKq8EIzNXgvKVZr3BENg84syMo= X-Received: by 2002:a05:6214:d61:b0:6e8:ff8d:cb68 with SMTP id 6a1803df08f44-6f064aef187mr107461856d6.35.1743917104702; Sat, 05 Apr 2025 22:25:04 -0700 (PDT) MIME-Version: 1.0 References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <86o6x9vpyk.fsf@gnu.org> In-Reply-To: <86o6x9vpyk.fsf@gnu.org> From: =?UTF-8?Q?Elijah_Gabe_P=C3=A9rez?= Date: Sat, 5 Apr 2025 23:24:54 -0600 X-Gm-Features: ATxdqUFnolqrOjkID7Ub07lnUKFVijGo4zhb1AP0dD5DBeuil49LDJy5XWFZpYA Message-ID: Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. To: Eli Zaretskii Content-Type: multipart/alternative; boundary="0000000000008b28ee06321557f1" X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --0000000000008b28ee06321557f1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Eli Zaretskii writes: > > From: Elijah Gabe P=C3=A9rez > > Cc: Eli Zaretskii , 77544@debbugs.gnu.org > > Date: Sat, 05 Apr 2025 12:08:02 -0600 > > > > Gerd M=C3=B6llmann writes: > > > > Nothing to add to your comments ATM, but maybe an alternative idea: ho= w > > about solving this with a new type of display property for drawing a > > horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil = or > > something to draw a line to the end of the display area? That would ha= ve > > the advantage that it would be a relatively locally confined change an= d > > would have no impact when not used, and hopefully little potential to > > break unrelated things when not used. > > > > I like this idea. > > > > One would have to have some Lisp though that puts the display property > > on form-feeds. > > > > In this case I would move this code to Lisp instead of C. > > A new kind of display property must be implemented in C. The rest of > the code can be in Lisp. > I meant to make that form feed characters use the new display property. > --0000000000008b28ee06321557f1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Eli Zaretskii <eliz@gnu.org= > writes:
> From: Elijah = Gabe P=C3=A9rez <eg642616@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,=C2=A0 77544@debbugs.gnu.org
> Date: Sat, 05 Apr 2025 12:08:02 -0600
>
> Gerd M=C3=B6llmann <gerd.moellmann@gmail.com> writes:<= br> >
>=C2=A0 Nothing to add to your comments ATM, but maybe an alternative id= ea: how
>=C2=A0 about solving this with a new type of display property for drawi= ng a
>=C2=A0 horizontal line? Say `horizontal-line WIDTH' where WIDTH cou= ld be nil or
>=C2=A0 something to draw a line to the end of the display area? That wo= uld have
>=C2=A0 the advantage that it would be a relatively locally confined cha= nge and
>=C2=A0 would have no impact when not used, and hopefully little potenti= al to
>=C2=A0 break unrelated things when not used.
>
> I like this idea.
>
>=C2=A0 One would have to have some Lisp though that puts the display pr= operty
>=C2=A0 on form-feeds.
>
> In this case I would move this code to Lisp instead of C.

A new kind of display property must be implemented in C.=C2=A0 The rest of<= br> the code can be in Lisp.

=
I meant to make that form feed characters use the n= ew display property.
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[2003:e0:b727:8a00:3128:f733:a5af:3bcd]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43ec163156asm94925485e9.7.2025.04.05.22.39.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Apr 2025 22:39:28 -0700 (PDT) From: =?utf-8?Q?Gerd_M=C3=B6llmann?= To: Eli Zaretskii Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. In-Reply-To: <86msctvpxe.fsf@gnu.org> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <86mscux5hg.fsf@gnu.org> <87v7ricw8p.fsf@gmail.com> <86msctvpxe.fsf@gnu.org> Date: Sun, 06 Apr 2025 07:39:27 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77544 Cc: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= , 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Eli Zaretskii writes: >> From: Elijah Gabe P=C3=A9rez >> Cc: Gerd M=C3=B6llmann , >> 77544@debbugs.gnu.org >> Date: Sat, 05 Apr 2025 12:13:26 -0600 >>=20 >> Eli Zaretskii writes: >>=20 >> One would have to have some Lisp though that puts the display property >> on form-feeds. >>=20 >> Right. Maybe a minor mode? >>=20 >> I think a minor mode would be better. >>=20 >> Or an optional feature of whitespace-mode? >>=20 >> I don't think whitespace-mode is related to this. > > The form-feed ^L character is one of whitespace characters. And white-space-mode already displays spaces, tabs, and newlines differently, AFAIR. Looks like a good fit. From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 02:53:19 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 06:53:19 +0000 Received: from localhost ([127.0.0.1]:45806 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1Jsd-0007NA-Fv for submit@debbugs.gnu.org; Sun, 06 Apr 2025 02:53:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44406) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u1Jsa-0007Mt-HZ for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 02:53:17 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u1JsV-000179-65; Sun, 06 Apr 2025 02:53:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=f8yqWUYcw5l1BOOzCAwCLVcMKGsnskqh2sJvvQj24Ps=; b=jbFtxzawwKTvijdu0ukh cPyz2KxyAcHFnBCMP0DxBffSWzJvsEczja+g06aYnSxTWNpsdqzeoHqJ+O7I9b1rtT0TKNDqxtiHC Gltfq5WIb5mSwv26V/wPpiZ7pu7cqnIC+g/K1fWpxayLIU6VOq5OTa5s6Vd7skZIEWvv72WTIepbk raiH974JHbJQV7gM+gKYP9Iey2XAWRyYVqy2P4+2vwju5+gpffCpRg+kNqWWzL9LnKnbVzxgQS1eo afaqt2hrax7m/UE3VQQW33ib0J4Z+YUIv7+R3kEYyeSrxlL3SUus0tlaDOYykMGNrnNJ33gpOzbJ0 fKKonIwDjVVLFA==; Date: Sun, 06 Apr 2025 09:53:08 +0300 Message-Id: <86bjt9vl0r.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= In-Reply-To: (message from Elijah Gabe =?utf-8?Q?P=C3=A9rez?= on Sat, 5 Apr 2025 23:33:04 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <86mscux5hg.fsf@gnu.org> <87v7ricw8p.fsf@gmail.com> <86msctvpxe.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Pérez > Date: Sat, 5 Apr 2025 23:33:04 -0600 > > Eli Zaretskii writes: > > > From: Elijah Gabe Pérez > > Cc: Gerd Möllmann , > > 77544@debbugs.gnu.org > > Date: Sat, 05 Apr 2025 12:13:26 -0600 > > > > Or an optional feature of whitespace-mode? > > > > I don't think whitespace-mode is related to this. > > The form-feed ^L character is one of whitespace characters. > > Right, but I don't think this should be whitespace-mode exclusive. IMO this new minor mode can be used as > alternative to make-separator-line (for example in shortdoc buffers) which looks ugly in both terminal and GUI > frames. Sure, but why is it a problem to make this part of whitespace-mode? It already has a number of optional features, each one of which can be turned on and off separately. The advantage is that we don't need to have yet another minor mode, yet another mode-line lighter, etc. Also, some people already turn on whitespace-mode in text modes. So I think this is something to be considered seriously. But we can delay this discussion until you have the feature implemented. 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In-Reply-To: <87zfgucwhp.fsf@gmail.com> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> Date: Sun, 06 Apr 2025 12:27:39 +0530 Message-ID: <87h631pyjg.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77544 Cc: Gerd =?utf-8?Q?M=C3=B6llmann?= , Eli Zaretskii , 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) [=E0=AE=9A=E0=AE=A9=E0=AE=BF =E0=AE=8F=E0=AE=AA=E0=AF=8D=E0=AE=B0=E0=AE=B2= =E0=AF=8D 05, 2025] Elijah Gabe P=C3=A9rez wrote: > Gerd M=C3=B6llmann writes: > >> Nothing to add to your comments ATM, but maybe an alternative idea: how >> about solving this with a new type of display property for drawing a >> horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or >> something to draw a line to the end of the display area? That would have >> the advantage that it would be a relatively locally confined change and >> would have no impact when not used, and hopefully little potential to >> break unrelated things when not used. > > I like this idea. Do we need a new display property when we have the :strike-through face attribute? The following achieves the same effect, albeit the newline is required for the :extend attribute to work properly AFAIU: (font-lock-add-keywords=20 nil '(("\f\n" (0 (prog1 nil (put-text-property (match-beginning 0) (1- (match-end 0= )) 'display " ") (put-text-property (match-beginning 0) (match-end 0) 'face '(:strike-through t :extend t)= )))))) (push 'display font-lock-extra-managed-props) From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 03:13:06 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 07:13:06 +0000 Received: from localhost ([127.0.0.1]:45833 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1KBm-0008JX-4v for submit@debbugs.gnu.org; Sun, 06 Apr 2025 03:13:06 -0400 Received: from mail-wm1-x329.google.com ([2a00:1450:4864:20::329]:56439) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1u1KBj-0008Iu-Kj for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 03:13:04 -0400 Received: by mail-wm1-x329.google.com with SMTP id 5b1f17b1804b1-43ce70f9afbso36153535e9.0 for <77544@debbugs.gnu.org>; Sun, 06 Apr 2025 00:13:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1743923577; x=1744528377; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8VrUaA04CUySiAMsb1nXYLVohkLvH+sjQVFJf7VwhwY=; b=fccp9RTQpinZJfF0VbGgRmfZSdDnTt0JZ9+K+gwPSk7y7VlO2bFGIj+PeuqFxCF9FK 1AoO/7AAO9YnW8zo7vCqPfAAw5XRFLq1hFx/+Ne2doAW1LmCz6EXD85M2crdTYOpWTu/ 3iNJE/Hfgl5lHSnB2AlIk0EaMyEwl+glfrArqVWD/ONKHFOQtiyHAVCBUsfVSTdLLzbp +d5jAFhSBdDwPZ2KH7MASy6ZbgeO7oK5Cbhv3I8IJi1FI+SJzlbZIzD4Q9SZiQD3DYhT SoYYGtG2oZLLAqEWvvkthqKBVPdmvDbAbH0XSYk0FHXqnGAxw97kaUV1DO+ZgWwM2/6V dvnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743923577; x=1744528377; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=8VrUaA04CUySiAMsb1nXYLVohkLvH+sjQVFJf7VwhwY=; b=q5K8f705Mpw6jkbOo/Eoa5/XAAsAoPXRdfDSlcitNf/Ena9C9CNFJqtp3AUWQ/M5EY FtstPmE7EpAEZfT0JRjPin/DPl6ne0Q0dFo65HatfpHhcLukrWPNZJHs6OBz2Q4wcsOv CVcE0JWtEtXyQb0JG3UjTGJrDV+lOoMLAax4j6qITBWK9//zJorF+AfjGPt3r2fwNI44 K+ID+IhC+qWNeaFRVGrQPjS7Z8F1nzII/eIIgL2ZoDqx3tewN//AWG6TmqjAIJoesplm uEa6/71I0tacyN7j3pMTL0zIFJWJOsniPz2/P3gIS3BTTSFknaVemobyLrk3J8jASdM5 fZSg== X-Forwarded-Encrypted: i=1; AJvYcCUt65s7xOVv09/HloXSXshmiVEpnYl8qFDgBA7Pb03tdHnt0KGhq5fN5I0DomDE/5RBYflGJw==@debbugs.gnu.org X-Gm-Message-State: AOJu0YwE0BhncXW5Wk4WnmkBbGoFRoLIPsaeYmHm5SOHSL9w7YanNJ1b UlSjjgAR+wxyxNCCHhJNtm7Xjk1GXGe/EjeKVUhQs/LUuj0vUML/woO7EX9R X-Gm-Gg: ASbGncsNH1xOiz39b6abxY+BsaN2coDDFIuJqAEZqvwu8IwcFNW1zNml/5nmfHpY0bk RV2s8jgMKJ25FwAYXhaWj3itOs8l4ZrzOYxVvmWNDEZCBMnOEmAQINiklOR1AwAQczMAItb4SnB fQW0RjR6l8Q1BugTBZExmOR0aOmjJ+Lnl8MpbMed6N1UnDTBseooaTkbDE8oV5CDpQn4pRHJOCM ghlmjJqUtJ/z8uaLdJtAOC50o0qxWp2h/wV/bFEjfzsUKfgOlv56LR9NBweHyxToeuWlnU9Nodo 4PI99s6OAaY4BgTBWpmzkpJbftSW81BBkcTDukGU9FK92yJgtCnJm8hqFArJo2x7bXbcjaWrlbC lCHDxx9ASRyguPYOnz/MkB4gGuas3JmX/vaD75jPqgstMPK4DtVRpzQ== X-Google-Smtp-Source: AGHT+IGS64hoTB5l9vpVmz8454uWFbU8jXtdKXRcKwRl6ro02XJU43xm7y8EVBxFhzSg3psECQd7Lg== X-Received: by 2002:a05:600c:3b08:b0:43c:fb5b:84d8 with SMTP id 5b1f17b1804b1-43ed0c50883mr64936165e9.16.1743923576639; Sun, 06 Apr 2025 00:12:56 -0700 (PDT) Received: from pro2 (p200300e0b7278a003128f733a5af3bcd.dip0.t-ipconnect.de. [2003:e0:b727:8a00:3128:f733:a5af:3bcd]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43ec1663060sm96454675e9.14.2025.04.06.00.12.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Apr 2025 00:12:56 -0700 (PDT) From: =?utf-8?Q?Gerd_M=C3=B6llmann?= To: Visuwesh Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. In-Reply-To: <87h631pyjg.fsf@gmail.com> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> Date: Sun, 06 Apr 2025 09:12:55 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77544 Cc: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= , 77544@debbugs.gnu.org, Eli Zaretskii X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Visuwesh writes: > [=E0=AE=9A=E0=AE=A9=E0=AE=BF =E0=AE=8F=E0=AE=AA=E0=AF=8D=E0=AE=B0=E0=AE= =B2=E0=AF=8D 05, 2025] Elijah Gabe P=C3=A9rez wrote: > >> Gerd M=C3=B6llmann writes: >> >>> Nothing to add to your comments ATM, but maybe an alternative idea: how >>> about solving this with a new type of display property for drawing a >>> horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or >>> something to draw a line to the end of the display area? That would have >>> the advantage that it would be a relatively locally confined change and >>> would have no impact when not used, and hopefully little potential to >>> break unrelated things when not used. >> >> I like this idea. > > Do we need a new display property when we have the :strike-through face > attribute? The following achieves the same effect, albeit the newline > is required for the :extend attribute to work properly AFAIU: > > (font-lock-add-keywords=20 > nil > '(("\f\n" (0 (prog1 nil > (put-text-property (match-beginning 0) (1- (match-end= 0)) > 'display " ") > (put-text-property (match-beginning 0) (match-end 0) > 'face '(:strike-through t :extend = t))))))) > (push 'display font-lock-extra-managed-props) Hm, that's right. And at least on my tty (iTerm2 on macOS) (display-supports-face-attributes-p '(:strike-through t)) =3D> t and it actually works, too. From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 03:31:25 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 07:31:25 +0000 Received: from localhost ([127.0.0.1]:45892 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1KTU-0000pY-Th for submit@debbugs.gnu.org; Sun, 06 Apr 2025 03:31:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53850) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u1KTS-0000p8-I0 for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 03:31:23 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u1KTL-0005P8-SP; Sun, 06 Apr 2025 03:31:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=3Z3ZSiRG7/V/xWHXMw++u+kgKq/EPCsvb9dKinCKq+c=; b=VMHZbcTWcZvQe/oV9NwF kaUHcCzUs8oqNhauDwHlkqDkITP8oQImn//TxLv8x1qro79GpITW8u+f7keZAtMVO0ObOTZiMrcJ3 mSN/oa1w1CERcxezA6VwTL4jnQakdp6U1x710EwignvDjPocYXXLqoAmNaPiReREElA5swhsMkKqP U1dV9ZPP7uo0BJ+Vf1oCJt4ox9mcXABqzaH/B1gVqj6/x5aaOvs1GNmLfO+FFMBhmH9u7l5nA0U85 nfZbrYrNHxgtmV6vZMIkuyzoDXa8h8IVR5ocm0Jj4XmP8V8iObhhgYQy83+b9DvYeSRq/OS/oQ95z +YC6+olMy9+ZCw==; Date: Sun, 06 Apr 2025 10:31:13 +0300 Message-Id: <867c3xvj9a.fsf@gnu.org> From: Eli Zaretskii To: Visuwesh In-Reply-To: <87h631pyjg.fsf@gmail.com> (message from Visuwesh on Sun, 06 Apr 2025 12:27:39 +0530) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, eg642616@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Visuwesh > Cc: Gerd Möllmann , Eli > Zaretskii , > 77544@debbugs.gnu.org > Date: Sun, 06 Apr 2025 12:27:39 +0530 > > [சனி ஏப்ரல் 05, 2025] Elijah Gabe Pérez wrote: > > > Gerd Möllmann writes: > > > >> Nothing to add to your comments ATM, but maybe an alternative idea: how > >> about solving this with a new type of display property for drawing a > >> horizontal line? Say `horizontal-line WIDTH' where WIDTH could be nil or > >> something to draw a line to the end of the display area? That would have > >> the advantage that it would be a relatively locally confined change and > >> would have no impact when not used, and hopefully little potential to > >> break unrelated things when not used. > > > > I like this idea. > > Do we need a new display property when we have the :strike-through face > attribute? The following achieves the same effect, albeit the newline > is required for the :extend attribute to work properly AFAIU: > > (font-lock-add-keywords > nil > '(("\f\n" (0 (prog1 nil > (put-text-property (match-beginning 0) (1- (match-end 0)) > 'display " ") > (put-text-property (match-beginning 0) (match-end 0) > 'face '(:strike-through t :extend t))))))) > (push 'display font-lock-extra-managed-props) Thanks, but what does this do on TTY frames? We'd want to show dashes, I think. Besides, we don't have any control on the thickness of the strike-through line, something that would be a natural extension here. And it sounds like a kludge to me, TBH. 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In-Reply-To: <867c3xvj9a.fsf@gnu.org> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> <867c3xvj9a.fsf@gnu.org> Date: Sun, 06 Apr 2025 16:07:06 +0530 Message-ID: <87cydppodp.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 3.6 (+++) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: [ஞாயிறு ஏப்ரல் 06, 2025] Eli Zaretskii wrote: >> Do we need a new display property when we have the :strike-through face >> attribute? The following achieves the same effect, albeit the newline >> is required for the :extend attribute to work pro [...] Content analysis details: (3.6 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:643 listed in] [list.dnswl.org] 3.6 RCVD_IN_SBL_CSS RBL: Received via a relay in Spamhaus SBL-CSS [1.7.159.71 listed in zen.spamhaus.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (visuweshm[at]gmail.com) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, eg642616@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 2.6 (++) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: [ஞாயிறு ஏப்ரல் 06, 2025] Eli Zaretskii wrote: >> Do we need a new display property when we have the :strike-through face >> attribute? The following achieves the same effect, albeit the newline >> is required for the :extend attribute to work pro [...] Content analysis details: (2.6 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:643 listed in] [list.dnswl.org] 3.6 RCVD_IN_SBL_CSS RBL: Received via a relay in Spamhaus SBL-CSS [1.7.159.71 listed in zen.spamhaus.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (visuweshm[at]gmail.com) -1.0 MAILING_LIST_MULTI Multiple indicators imply a widely-seen list manager [=E0=AE=9E=E0=AE=BE=E0=AE=AF=E0=AE=BF=E0=AE=B1=E0=AF=81 =E0=AE=8F=E0=AE=AA= =E0=AF=8D=E0=AE=B0=E0=AE=B2=E0=AF=8D 06, 2025] Eli Zaretskii wrote: >> Do we need a new display property when we have the :strike-through face >> attribute? The following achieves the same effect, albeit the newline >> is required for the :extend attribute to work properly AFAIU: >>=20 >> (font-lock-add-keywords=20 >> nil >> '(("\f\n" (0 (prog1 nil >> (put-text-property (match-beginning 0) (1- (match-en= d 0)) >> 'display " ") >> (put-text-property (match-beginning 0) (match-end 0) >> 'face '(:strike-through t :extend= t))))))) >> (push 'display font-lock-extra-managed-props) > > Thanks, but what does this do on TTY frames? We'd want to show > dashes, I think. I see no difference from the line in show in a GUI frame, and in xterm. However, I don't see a line at all in the Linux tty thingy. The font used in xterm does not seem to matter either. > Besides, we don't have any control on the thickness of the > strike-through line, something that would be a natural extension here. > And it sounds like a kludge to me, TBH. More styling for the horizontal line, similar to what have for :underline, would be nice to have too. And I agree, it is a bit of hack. From debbugs-submit-bounces@debbugs.gnu.org Sun Apr 06 06:59:02 2025 Received: (at 77544) by debbugs.gnu.org; 6 Apr 2025 10:59:02 +0000 Received: from localhost ([127.0.0.1]:46194 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1u1NiQ-00029h-1J for submit@debbugs.gnu.org; Sun, 06 Apr 2025 06:59:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34388) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1u1NiN-000297-JI for 77544@debbugs.gnu.org; Sun, 06 Apr 2025 06:59:00 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1u1NiI-0001XV-8G; Sun, 06 Apr 2025 06:58:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=8mS78FkK3fUuezH7/Qm7ux4YXv41XaiGwNG1s0pdbV0=; b=r2PHja5BL/sk1kNSXCnd e5vad7hRWywTbqc44H1Jz0xzHvz23i5GZ/ku7BP218zqy4qjLisR8wlai0bZ5/M4ZormfK+9l5slf /eQ/hdP3mrJBe9JJF7/3sjpfWbT5mPJnlIzTO4FI8V4V+ybmxBGBLvqLW10mr9k6pe1eg2n4gBNrq j1ALq0QxT4/ZZjQZvz9qQeDciTiMroO2LzJ/meNN+NgWhp/KY6lKJEo5sgS/GqBQufbPySAD6GsrR 1usUeNbNauxx5ZQRdwQFxX8tjnhxOQ+6MyH+wC97NkYqmvV8HZ/XCqd7+Qxegw2KznsOC00b6hReb 6kCrVtkQ1bVzIA==; Date: Sun, 06 Apr 2025 13:58:50 +0300 Message-Id: <8634elv9n9.fsf@gnu.org> From: Eli Zaretskii To: Visuwesh In-Reply-To: <87cydppodp.fsf@gmail.com> (message from Visuwesh on Sun, 06 Apr 2025 16:07:06 +0530) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> <867c3xvj9a.fsf@gnu.org> <87cydppodp.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, eg642616@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Visuwesh > Cc: eg642616@gmail.com, gerd.moellmann@gmail.com, 77544@debbugs.gnu.org > Date: Sun, 06 Apr 2025 16:07:06 +0530 > > [ஞாயிறு ஏப்ரல் 06, 2025] Eli Zaretskii wrote: > > > Thanks, but what does this do on TTY frames? We'd want to show > > dashes, I think. > > I see no difference from the line in show in a GUI frame, and in xterm. > However, I don't see a line at all in the Linux tty thingy. The font > used in xterm does not seem to matter either. > > > Besides, we don't have any control on the thickness of the > > strike-through line, something that would be a natural extension here. > > And it sounds like a kludge to me, TBH. > > More styling for the horizontal line, similar to what have for > :underline, would be nice to have too. And I agree, it is a bit of > hack. I think a new kind of display property is a cleaner solution. It will also make it easier to extend the feature, e.g., if we want the visual appearance be more like what word processors show for a "page break". 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To: Eli Zaretskii Content-Type: multipart/alternative; boundary="000000000000dc7a9b06321c13d9" X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --000000000000dc7a9b06321c13d9 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Eli Zaretskii writes: > > From: Elijah Gabe P=C3=A9rez > > Date: Sat, 5 Apr 2025 23:33:04 -0600 > > > > Eli Zaretskii writes: > > > > > From: Elijah Gabe P=C3=A9rez > > > Cc: Gerd M=C3=B6llmann , > > > 77544@debbugs.gnu.org > > > Date: Sat, 05 Apr 2025 12:13:26 -0600 > > > > > > Or an optional feature of whitespace-mode? > > > > > > I don't think whitespace-mode is related to this. > > > > The form-feed ^L character is one of whitespace characters. > > > > Right, but I don't think this should be whitespace-mode exclusive. IMO > this new minor mode can be used as > > alternative to make-separator-line (for example in shortdoc buffers) > which looks ugly in both terminal and GUI > > frames. > > Sure, but why is it a problem to make this part of whitespace-mode? > It already has a number of optional features, each one of which can > be turned on and off separately. > > The advantage is that we don't need to have yet another minor mode, > yet another mode-line lighter, etc. Also, some people already turn on > whitespace-mode in text modes. > It makes sense, since ^L characters are often used in files. > --000000000000dc7a9b06321c13d9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Eli Zaretskii <eliz@gnu.org> writes:
> From: Elijah Gabe P=C3=A9rez <eg64261= 6@gmail.com>
> Date: Sat, 5 Apr 2025 23:33:04 -0600
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
>=C2=A0 > From: Elijah Gabe P=C3=A9rez <eg642616@gmail.= com>
>=C2=A0 > Cc: Gerd M=C3=B6llmann <gerd.moellmann@= gmail.com>,
>=C2=A0 >=C2=A0 =C2=A077544@debbugs.gnu.org
>=C2=A0 > Date: Sat, 05 Apr 2025 12:13:26 -0600
>=C2=A0 >
>=C2=A0 >=C2=A0 Or an optional feature of whitespace-mode?
>=C2=A0 >
>=C2=A0 > I don't think whitespace-mode is related to this.
>
>=C2=A0 The form-feed ^L character is one of whitespace characters.
>
> Right, but I don't think this should be whitespace-mode exclusive.= =C2=A0 IMO this new minor mode can be used as
> alternative to make-separator-line (for example in shortdoc buffers) w= hich looks ugly in both terminal and GUI
> frames.

Sure, but why is it a problem to make this part of whitespace-mode?
It already has a number of optional features, each one of which can
be turned on and off separately.

The advantage is that we don't need to have yet another minor mode,
yet another mode-line lighter, etc.=C2=A0 Also, some people already turn on=
whitespace-mode in text modes.


It makes sense, since ^L characters are often used in files.
X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --=-=-= Content-Type: text/plain Sorry for the delay, i tried to make the strike-through face property support the same line styles as the underline, but i couldn't figure out how, as it seems that strike-through is designed to support only 1 style. My solution was to make a kind of hack to display the underline as strike-through, and it worked. Another solution was to reuse the code from display space type, for make a new display property type (as suggested by Gerd), but I ended up getting lost when I saw too many references to this in the source code, so for now the hack was the only solution I could think of. This should work well in both GUI and TUI frames. In GUI, the line will be displayed as a double horizontal line (as shown in the screenshot) --=-=-= Content-Type: image/png Content-Disposition: inline; filename="Captura desde 2025-08-08 23-05-44.png" Content-Transfer-Encoding: base64 iVBORw0KGgoAAAANSUhEUgAAAq8AAAEuCAYAAACgZft9AAAABHNCSVQICAgIfAhkiAAAABl0RVh0 U29mdHdhcmUAZ25vbWUtc2NyZWVuc2hvdO8Dvz4AAAAmdEVYdENyZWF0aW9uIFRpbWUAdmllIDA4 IGFnbyAyMDI1IDIzOjA1OjQ0hBrdrgAAIABJREFUeJzs3Xl8E3X+P/BXeiVNekCLtFylQG25pOVQ KnIoAqXgqkhBEaTsV7zA1V3BZdfjJ+5WZV2X1S4KruIuxQoiIJcg0nqCcm4F5Ya2QC/oYVvapEeS z++PIdOmSTtTmtIGX8/Hg4fJvDPzec9nPknfTj4z0RQXFwsQEREREbkBjRCCxSsRERERuQWPtk7g ahgLjbCarW2dBhEREbVjVrMVxkJjW6dBLuZ2xWvODzlYHr0cRz8+2tapEBERUTt29OOjWBGzArn7 cts6FXIhtypeC48VInVSKvon9MfAGQMd4hs3bkTXrl0REhKClStXurTttWvXIjQ09KrWffLJJ6HR aKDRaDBu3DiX5gUAEydOxAsvvODy7V4vrrf+SUtLg06nu+bt3nPPPRgwYADMZrPd8tYe3zqdDmlp aVedH1r4/qX2pbnjX+34bGr8qOGu4+96/3wc+MBA9JvaD6mTUlF8srhNcyPXcZ/iVQBbHt6C8NvD 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kdC4ut3XxSvnHxER3Q+sLl7z8o7j6afHwd3ddUCC6Fv1AAB7rT2UdkrM3TV3QPYzlFT2EmA/1Cno QcX5R0RE94P/B1vLxYCKJaymAAAAAElFTkSuQmCC --=-=-= Content-Type: text/plain And in TUI, it will be displayed as a normal underline (or strike-through if underline is not supported). Optionally, I've added a new minor mode to enable this outside whitespace-mode (an example of use in this would be in the NEWS file or in *Compile-Log* buffers). --=-=-= Content-Type: text/x-patch Content-Disposition: attachment; filename=0001-whitespace-mode-Prettify-page-delimiters-characters..patch >From 751e8c3ab69fca962afcaa20e3b3fc23e5d6a2b7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?El=C3=ADas=20Gabriel=20P=C3=A9rez?= Date: Fri, 4 Apr 2025 22:17:23 -0600 Subject: [PATCH] whitespace-mode: Prettify page delimiters characters. (bug#77544) This makes whitespace-mode display the page delimiter character "^L" as a pretty horizontal line. This also add a new minor mode to display these character outside of whitespace-mode. * lisp/whitespace.el (whitespace-style): Add page-delimiters option. (whitespace-page-delimiter): New face. (whitespace--page-delimiters-keyword): New variable. (whitespace-page-delimiters-mode): New minor mode. (whitespace-style-face-p, whitespace-color-on): Rework for display the page-delimiters. --- etc/NEWS | 8 ++++++ lisp/whitespace.el | 69 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) diff --git a/etc/NEWS b/etc/NEWS index e12a9dcb127..1bd901c2960 100644 --- a/etc/NEWS +++ b/etc/NEWS @@ -1112,6 +1112,14 @@ slot. Symbol macros are created for the accessor functions using If 'whitespace-style' includes 'missing-newline-at-eof' (which is the default), the 'whitespace-cleanup' function will now add the newline. +--- +*** 'whitespace-mode' now can prettify page delimiters characters (^L). +If 'page-delimiters' is set in 'whitespace-style', or the new minor mode +'whitespace-page-delimiters-mode' is on, the page delimiters characters +(^L) are displayed as a pretty horizontal line that spans the entire +width of the window. The new 'whitespace-page-delimiter' face, can be +used for customize the appearence + ** Bookmark --- diff --git a/lisp/whitespace.el b/lisp/whitespace.el index 58ba0db8c90..79afb8cf298 100644 --- a/lisp/whitespace.el +++ b/lisp/whitespace.el @@ -326,6 +326,11 @@ whitespace-style This has effect only if `face' (see above) is present in `whitespace-style'. + page-delimiters visualize page delimiters characters (^L) + as horizontal lines. + This has effect only if `face' (see above) + is present in `whitespace-style'. + empty visualize empty lines at beginning and/or end of buffer via faces. This has effect only if `face' (see above) @@ -440,6 +445,7 @@ whitespace-style (const :tag "(Face) NEWLINEs" newline) (const :tag "(Face) Missing newlines at EOB" missing-newline-at-eof) + (const :tag "(Face) Page delimiters" page-delimiters) (const :tag "(Face) Empty Lines At BOB And/Or EOB" empty) (const :tag "(Face) Indentation SPACEs" indentation::tab) (const :tag "(Face) Indentation TABs" @@ -622,6 +628,14 @@ whitespace-space-after-tab See `whitespace-space-after-tab-regexp'.") +(defface whitespace-page-delimiter + '((((supports :underline (:color foreground-color :style double-line))) + :underline (:color foreground-color :style double-line) + :extend t :inherit shadow) + (((supports :strike-through t)) + :strike-through t :extend t :inherit shadow) + (t :extend t :inherit shadow :inverse-video t)) + "Face used to visualize page delimiter characters.") (defcustom whitespace-hspace-regexp "\\(\u00A0+\\)" @@ -934,6 +948,29 @@ whitespace-action (const :tag "Abort On Bogus" abort-on-bogus) (const :tag "Warn If Read-Only" warn-if-read-only))))) +(defvar whitespace--page-delimiters-keyword + `((,(concat page-delimiter "\n") 0 + (prog1 nil + ;; HACK: Due :strike-through, doesn't support the same line + ;; styles as in :underline, for GUI frames raise the invisible ^L + ;; character to give the illusion of a centered line (unless + ;; whitespace-page-delimiter doesn't have the :underline attribute). + ;; In TUI, this is only displayed as an normal underline. + ;; FIXME: Rewrite this when :strike-through supports this. + (if (not (eq (internal-get-lisp-face-attribute + 'whitespace-page-delimiter :underline) + 'unspecified)) + (progn + ;; :underline + (put-text-property (match-beginning 0) (1- (match-end 0)) + 'display (propertize " " 'display '(raise 0.5))) + (put-text-property (1- (match-end 0)) (match-end 0) 'display '(raise 0.5)) + (add-face-text-property (match-beginning 0) (match-end 0) '(:inherit whitespace-page-delimiter :height 0.5))) + ;; :strike-through + (put-text-property (match-beginning 0) (1- (match-end 0)) 'display " ") + (add-face-text-property (match-beginning 0) (match-end 0) 'whitespace-page-delimiter))))) + "Used to add page delimiters keywords to `whitespace-font-lock-keywords'.") + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;; User commands - Local mode @@ -976,6 +1013,25 @@ whitespace-newline-mode ;; sync states (running a batch job) (setq whitespace-newline-mode whitespace-mode)) +;;;###autoload +(define-minor-mode whitespace-page-delimiters-mode + "Display page delimiters characters as horizontal lines." + :group 'whitespace + (cond + ((and whitespace-mode (not (memq 'page-delimiters whitespace-style))) + (setq-local whitespace-style + (cons 'page-delimiters whitespace-style)) + (whitespace-mode +1)) + (whitespace-page-delimiters-mode + (font-lock-add-keywords nil whitespace--page-delimiters-keyword) + (unless (memq 'display font-lock-extra-managed-props) + (setq-local font-lock-extra-managed-props + (cons 'display font-lock-extra-managed-props))) + (font-lock-flush)) + (t + (font-lock-remove-keywords nil whitespace--page-delimiters-keyword) + (font-lock-flush)))) + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;; User commands - Global mode @@ -1044,6 +1100,7 @@ whitespace-style-value-list tabs spaces trailing + page-delimiters lines lines-tail lines-char @@ -1071,6 +1128,7 @@ whitespace-toggle-option-alist '((?f . face) (?t . tabs) (?s . spaces) + (?p . page-delimiters) (?r . trailing) (?l . lines) (?L . lines-tail) @@ -1156,6 +1214,7 @@ whitespace-toggle-options t toggle TAB visualization s toggle SPACE and HARD SPACE visualization r toggle trailing blanks visualization + p toggle page delimiters visualization l toggle \"long lines\" visualization L toggle \"long lines\" tail visualization n toggle NEWLINE visualization @@ -1186,6 +1245,7 @@ whitespace-toggle-options tabs toggle TAB visualization spaces toggle SPACE and HARD SPACE visualization trailing toggle trailing blanks visualization + page-delimiters toggle page delimiters visualization lines toggle \"long lines\" visualization lines-tail toggle \"long lines\" tail visualization newline toggle NEWLINE visualization @@ -1237,6 +1297,7 @@ global-whitespace-toggle-options t toggle TAB visualization s toggle SPACE and HARD SPACE visualization r toggle trailing blanks visualization + p toggle page delimiters visualization l toggle \"long lines\" visualization L toggle \"long lines\" tail visualization C-l toggle \"long lines\" one character visualization @@ -1268,6 +1329,7 @@ global-whitespace-toggle-options tabs toggle TAB visualization spaces toggle SPACE and HARD SPACE visualization trailing toggle trailing blanks visualization + page-delimiters toggle page delimiters visualization lines toggle \"long lines\" visualization lines-tail toggle \"long lines\" tail visualization lines-char toggle \"long lines\" one character visualization @@ -2035,6 +2097,7 @@ whitespace-style-face-p (memq 'lines-tail whitespace-active-style) (memq 'lines-char whitespace-active-style) (memq 'newline whitespace-active-style) + (memq 'page-delimiters whitespace-active-style) (memq 'empty whitespace-active-style) (memq 'indentation whitespace-active-style) (memq 'indentation::tab whitespace-active-style) @@ -2108,6 +2171,12 @@ whitespace-color-on ;; first overflowing character ((memq 'lines-char whitespace-active-style) 3)) whitespace-line prepend))) + ,@(when (memq 'page-delimiters whitespace-active-style) + (unless (memq 'display font-lock-extra-managed-props) + (setq-local font-lock-extra-managed-props + (cons 'display font-lock-extra-managed-props))) + ;; Show page delimiters characters + whitespace--page-delimiters-keyword) ,@(when (or (memq 'space-before-tab whitespace-active-style) (memq 'space-before-tab::tab whitespace-active-style) (memq 'space-before-tab::space whitespace-active-style)) -- 2.50.1 --=-=-= Content-Type: text/plain -- - E.G via Gnus and Org. --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Sat Aug 09 05:35:15 2025 Received: (at 77544) by debbugs.gnu.org; 9 Aug 2025 09:35:15 +0000 Received: from localhost ([127.0.0.1]:40219 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ukfyt-0005eT-BN for submit@debbugs.gnu.org; Sat, 09 Aug 2025 05:35:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49664) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1ukfyp-0005ar-Sg for 77544@debbugs.gnu.org; Sat, 09 Aug 2025 05:35:13 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ukfyk-0004Lh-9H; Sat, 09 Aug 2025 05:35:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=JNbLZPG5hZqzFdSbzpxA594p2Oj+DEekeRr6EIUhfds=; b=DnG6RtdA1UTjCBxetiEN NFemWH+fwGl9KAu7qUsvNImBMj56R0YIrH8YYrQDhIXVJKTVvR/ozylaKqj5C5K5UE3+dmWk3dD9/ E8S3h6cooy7vz/qqMBiGJMU/by6FZm3UJGGfQIQR4WeuTzKFaklCyDEziArTzQlYQJ0E+oPwGt3VY rik4EARb8veCIRYam5Vb+7idyveY9l26KvBnVjK1hJ6yyg61o8dgq38mruJAymcT53zEtacFuL4l4 tmBhtP1l1itHwopXUc0LJw0bpegfgaSqpHNjmAMq3kj5uH8P4to+JMzqxrywtKnoObpIaWiuBOdgI od7Rt4dC5X0GFg==; Date: Sat, 09 Aug 2025 12:35:01 +0300 Message-Id: <86fre0n8hm.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?iso-8859-1?Q?P=E9rez?= In-Reply-To: <87o6spf5e8.fsf@gmail.com> (message from Elijah Gabe =?iso-8859-1?Q?P=E9rez?= on Fri, 08 Aug 2025 23:09:03 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> <867c3xvj9a.fsf@gnu.org> <87cydppodp.fsf@gmail.com> <8634elv9n9.fsf@gnu.org> <87o6spf5e8.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org, visuweshm@gmail.com X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Prez > Cc: Visuwesh , gerd.moellmann@gmail.com, > 77544@debbugs.gnu.org > Date: Fri, 08 Aug 2025 23:09:03 -0600 > > Sorry for the delay, i tried to make the strike-through face property > support the same line styles as the underline, but i couldn't figure out > how, as it seems that strike-through is designed to support only 1 > style. > > My solution was to make a kind of hack to display the underline as > strike-through, and it worked. Why is it a problem to show a normal underline? > Optionally, I've added a new minor mode to enable this outside > whitespace-mode (an example of use in this would be in the NEWS file or > in *Compile-Log* buffers). I'm not sure it is justified to have a separate mode for this. > +--- > +*** 'whitespace-mode' now can prettify page delimiters characters (^L). > +If 'page-delimiters' is set in 'whitespace-style', or the new minor mode > +'whitespace-page-delimiters-mode' is on, the page delimiters characters ^^^^^^^^^^ "delimiter", singular. > +(^L) are displayed as a pretty horizontal line that spans the entire > +width of the window. The new 'whitespace-page-delimiter' face, can be ^ That comma should be deleted. > +used for customize the appearence ^^^^^^^^^^^^^ Either "to customize" or "for customizing". I think we should also mention that font-lock must be ON for this to work. E.g., does it work in Fundamental mode? > +;;;###autoload > +(define-minor-mode whitespace-page-delimiters-mode > + "Display page delimiters characters as horizontal lines." > + :group 'whitespace > + (cond > + ((and whitespace-mode (not (memq 'page-delimiters whitespace-style))) > + (setq-local whitespace-style > + (cons 'page-delimiters whitespace-style)) > + (whitespace-mode +1)) > + (whitespace-page-delimiters-mode > + (font-lock-add-keywords nil whitespace--page-delimiters-keyword) > + (unless (memq 'display font-lock-extra-managed-props) > + (setq-local font-lock-extra-managed-props > + (cons 'display font-lock-extra-managed-props))) > + (font-lock-flush)) > + (t > + (font-lock-remove-keywords nil whitespace--page-delimiters-keyword) > + (font-lock-flush)))) Is it wise to support this minor mode outside of whitespace-mode? Why shouldn't this work only if whitespace-mode is ON? It complicates the implementation, and adds 'display' properties to font-lock-keywords, but I don't quite see the justification. 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In-Reply-To: <86fre0n8hm.fsf@gnu.org> References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> <867c3xvj9a.fsf@gnu.org> <87cydppodp.fsf@gmail.com> <8634elv9n9.fsf@gnu.org> <87o6spf5e8.fsf@gmail.com> <86fre0n8hm.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/31.0.50 Date: Sat, 09 Aug 2025 18:25:36 -0600 Message-ID: <87jz3cuinz.fsf@gmail.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" X-Spam-Score: 1.3 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Eli Zaretskii writes: >> From: Elijah Gabe Pérez >> Cc: Visuwesh , gerd.moellmann@gmail.com, >> 77544@debbugs.gnu.org >> Date: Fri, 08 Aug 2025 23:09:03 -0600 >> >> Sorry for the delay, i tried to make the strike-throu [...] Content analysis details: (1.3 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (eg642616[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (eg642616[at]gmail.com) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 FREEMAIL_REPLY From and body contain different freemails X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org, visuweshm@gmail.com X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.7 (/) --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Eli Zaretskii writes: >> From: Elijah Gabe P=C3=A9rez >> Cc: Visuwesh , gerd.moellmann@gmail.com, >> 77544@debbugs.gnu.org >> Date: Fri, 08 Aug 2025 23:09:03 -0600 >>=20 >> Sorry for the delay, i tried to make the strike-through face property >> support the same line styles as the underline, but i couldn't figure out >> how, as it seems that strike-through is designed to support only 1 >> style. >>=20 >> My solution was to make a kind of hack to display the underline as >> strike-through, and it worked. > > Why is it a problem to show a normal underline? Actually it is more for stylistic reasons than anything else, many third party packages that implement this functionality always use the strike-through property, never underline (mainly to show it as a horizontal rule), to mention a few: form-feed, form-feed-st, page-break-lines, and org-modern. Some users or themes may prefer to use the same styles that underline now provides (for this horizontal rule), which however are not available in strike-through, to maintain this consistency, if the face has the underline property, it will be displayed as if it were a strike-through, otherwise it will be displayed normally. >> Optionally, I've added a new minor mode to enable this outside >> whitespace-mode (an example of use in this would be in the NEWS file or >> in *Compile-Log* buffers). > > I'm not sure it is justified to have a separate mode for this. I don't see why not, whitespace.el have 'whitespace-newline-mode', which is only used for toggle the newline visualization. This avoids having to enable whitespace-mode (which can include spaces and tabs marks in the buffer) to enable just this cosmetic. >> +;;;###autoload >> +(define-minor-mode whitespace-page-delimiters-mode >> + "Display page delimiters characters as horizontal lines." >> + :group 'whitespace >> + (cond >> + ((and whitespace-mode (not (memq 'page-delimiters whitespace-style))) >> + (setq-local whitespace-style >> + (cons 'page-delimiters whitespace-style)) >> + (whitespace-mode +1)) >> + (whitespace-page-delimiters-mode >> + (font-lock-add-keywords nil whitespace--page-delimiters-keyword) >> + (unless (memq 'display font-lock-extra-managed-props) >> + (setq-local font-lock-extra-managed-props >> + (cons 'display font-lock-extra-managed-props))) >> + (font-lock-flush)) >> + (t >> + (font-lock-remove-keywords nil whitespace--page-delimiters-keyword) >> + (font-lock-flush)))) > > Is it wise to support this minor mode outside of whitespace-mode? Why > shouldn't this work only if whitespace-mode is ON? It complicates the > implementation, and adds 'display' properties to font-lock-keywords, > but I don't quite see the justification. A better alternative is to make this minor mode act as 'whitespace-newline-mode', to toggle the visibility of page delimiters if whitespace-mode is activated, otherwise, activate whitespace-mode to only display them. I've updated the patch, so the minor should work in fundamental-mode and toggle the page-delimiter visualization. --=-=-= Content-Type: text/x-patch Content-Disposition: attachment; filename=0001-whitespace-mode-Prettify-page-delimiters-characters..patch >From 2347cd9555947d4cf407f9daec119c127b34c9bf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?El=C3=ADas=20Gabriel=20P=C3=A9rez?= Date: Fri, 4 Apr 2025 22:17:23 -0600 Subject: [PATCH] whitespace-mode: Prettify page delimiters characters. (bug#77544) This makes whitespace-mode display the page delimiter character "^L" as a pretty horizontal line. This also add a new minor mode to toggle these visualisations. * lisp/whitespace.el (whitespace-style): Add page-delimiters option. (whitespace-page-delimiter): New face. (whitespace--page-delimiters-keyword): New variable. (whitespace-page-delimiters-mode): New minor mode. (whitespace-style-face-p, whitespace-color-on): Rework for display the page-delimiters. --- etc/NEWS | 8 ++++++ lisp/whitespace.el | 63 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+) diff --git a/etc/NEWS b/etc/NEWS index e12a9dcb127..b9d224be14a 100644 --- a/etc/NEWS +++ b/etc/NEWS @@ -1112,6 +1112,14 @@ slot. Symbol macros are created for the accessor functions using If 'whitespace-style' includes 'missing-newline-at-eof' (which is the default), the 'whitespace-cleanup' function will now add the newline. +--- +*** 'whitespace-mode' now can prettify page delimiter characters (^L). +If 'page-delimiters' is set in 'whitespace-style', or the new minor mode +'whitespace-page-delimiters-mode' is on, the page delimiter characters +(^L) are displayed as a pretty horizontal line that spans the entire +width of the window. The new 'whitespace-page-delimiter' face can be +used to customize the appearence. + ** Bookmark --- diff --git a/lisp/whitespace.el b/lisp/whitespace.el index 58ba0db8c90..dbcc0081685 100644 --- a/lisp/whitespace.el +++ b/lisp/whitespace.el @@ -326,6 +326,11 @@ whitespace-style This has effect only if `face' (see above) is present in `whitespace-style'. + page-delimiters visualize page delimiters characters (^L) + as horizontal lines. + This has effect only if `face' (see above) + is present in `whitespace-style'. + empty visualize empty lines at beginning and/or end of buffer via faces. This has effect only if `face' (see above) @@ -440,6 +445,7 @@ whitespace-style (const :tag "(Face) NEWLINEs" newline) (const :tag "(Face) Missing newlines at EOB" missing-newline-at-eof) + (const :tag "(Face) Page delimiters" page-delimiters) (const :tag "(Face) Empty Lines At BOB And/Or EOB" empty) (const :tag "(Face) Indentation SPACEs" indentation::tab) (const :tag "(Face) Indentation TABs" @@ -622,6 +628,14 @@ whitespace-space-after-tab See `whitespace-space-after-tab-regexp'.") +(defface whitespace-page-delimiter + '((((supports :underline (:color foreground-color :style double-line))) + :underline (:color foreground-color :style double-line) + :extend t :inherit shadow) + (((supports :strike-through t)) + :strike-through t :extend t :inherit shadow) + (t :extend t :inherit shadow :inverse-video t)) + "Face used to visualize page delimiter characters.") (defcustom whitespace-hspace-regexp "\\(\u00A0+\\)" @@ -934,6 +948,29 @@ whitespace-action (const :tag "Abort On Bogus" abort-on-bogus) (const :tag "Warn If Read-Only" warn-if-read-only))))) +(defvar whitespace--page-delimiters-keyword + `((,(concat page-delimiter "\n") 0 + (prog1 nil + ;; HACK: Due :strike-through, doesn't support the same line + ;; styles as in :underline, for GUI frames raise the invisible ^L + ;; character to give the illusion of a centered line (unless + ;; whitespace-page-delimiter doesn't have the :underline attribute). + ;; In TUI, this is only displayed as an normal underline. + ;; FIXME: Rewrite this when there is an easy way to implement this. + (if (not (eq (internal-get-lisp-face-attribute + 'whitespace-page-delimiter :underline) + 'unspecified)) + (progn + ;; underline + (put-text-property (match-beginning 0) (1- (match-end 0)) + 'display (propertize " " 'display '(raise 0.5))) + (put-text-property (1- (match-end 0)) (match-end 0) 'display '(raise 0.5)) + (add-face-text-property (match-beginning 0) (match-end 0) '(:inherit whitespace-page-delimiter :height 0.5))) + ;; not underline + (put-text-property (match-beginning 0) (1- (match-end 0)) 'display " ") + (add-face-text-property (match-beginning 0) (match-end 0) 'whitespace-page-delimiter))))) + "Used to add page delimiters keywords to `whitespace-font-lock-keywords'.") + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;; User commands - Local mode @@ -976,6 +1013,19 @@ whitespace-newline-mode ;; sync states (running a batch job) (setq whitespace-newline-mode whitespace-mode)) +;;;###autoload +(define-minor-mode whitespace-page-delimiters-mode + "Display page delimiters characters as horizontal lines. + +Use `whitespace-page-delimiters-mode' only for PAGE DELIMITER +character visualization exclusively. For other visualizations, +including PAGE DELIMITER visualization together with (HARD) +SPACEs and/or TABs, please, use `whitespace-mode'." + :group 'whitespace + (let ((whitespace-style '(face page-delimiters))) + (whitespace-mode (if whitespace-page-delimiters-mode + 1 -1)))) + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;; User commands - Global mode @@ -1044,6 +1094,7 @@ whitespace-style-value-list tabs spaces trailing + page-delimiters lines lines-tail lines-char @@ -1071,6 +1122,7 @@ whitespace-toggle-option-alist '((?f . face) (?t . tabs) (?s . spaces) + (?p . page-delimiters) (?r . trailing) (?l . lines) (?L . lines-tail) @@ -1156,6 +1208,7 @@ whitespace-toggle-options t toggle TAB visualization s toggle SPACE and HARD SPACE visualization r toggle trailing blanks visualization + p toggle page delimiters visualization l toggle \"long lines\" visualization L toggle \"long lines\" tail visualization n toggle NEWLINE visualization @@ -1186,6 +1239,7 @@ whitespace-toggle-options tabs toggle TAB visualization spaces toggle SPACE and HARD SPACE visualization trailing toggle trailing blanks visualization + page-delimiters toggle page delimiters visualization lines toggle \"long lines\" visualization lines-tail toggle \"long lines\" tail visualization newline toggle NEWLINE visualization @@ -1237,6 +1291,7 @@ global-whitespace-toggle-options t toggle TAB visualization s toggle SPACE and HARD SPACE visualization r toggle trailing blanks visualization + p toggle page delimiters visualization l toggle \"long lines\" visualization L toggle \"long lines\" tail visualization C-l toggle \"long lines\" one character visualization @@ -1268,6 +1323,7 @@ global-whitespace-toggle-options tabs toggle TAB visualization spaces toggle SPACE and HARD SPACE visualization trailing toggle trailing blanks visualization + page-delimiters toggle page delimiters visualization lines toggle \"long lines\" visualization lines-tail toggle \"long lines\" tail visualization lines-char toggle \"long lines\" one character visualization @@ -2035,6 +2091,7 @@ whitespace-style-face-p (memq 'lines-tail whitespace-active-style) (memq 'lines-char whitespace-active-style) (memq 'newline whitespace-active-style) + (memq 'page-delimiters whitespace-active-style) (memq 'empty whitespace-active-style) (memq 'indentation whitespace-active-style) (memq 'indentation::tab whitespace-active-style) @@ -2108,6 +2165,12 @@ whitespace-color-on ;; first overflowing character ((memq 'lines-char whitespace-active-style) 3)) whitespace-line prepend))) + ,@(when (memq 'page-delimiters whitespace-active-style) + (unless (memq 'display font-lock-extra-managed-props) + (setq-local font-lock-extra-managed-props + (cons 'display font-lock-extra-managed-props))) + ;; Show page delimiters characters + whitespace--page-delimiters-keyword) ,@(when (or (memq 'space-before-tab whitespace-active-style) (memq 'space-before-tab::tab whitespace-active-style) (memq 'space-before-tab::space whitespace-active-style)) -- 2.50.1 --=-=-= Content-Type: text/plain -- - E.G via Gnus and Org. --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Sun Aug 10 01:23:46 2025 Received: (at 77544) by debbugs.gnu.org; 10 Aug 2025 05:23:46 +0000 Received: from localhost ([127.0.0.1]:43658 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ukyX4-0005MN-2r for submit@debbugs.gnu.org; Sun, 10 Aug 2025 01:23:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57990) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1ukyX2-0005M1-5R for 77544@debbugs.gnu.org; Sun, 10 Aug 2025 01:23:44 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ukyWw-0000vC-D8; Sun, 10 Aug 2025 01:23:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=8ADOT4iocbMTraimrgrQ8H84fGDVLVdIWq87LUE76l0=; b=iMS88bOrvhSkHfIinYPA hAuRiKSS6+mBsGpE5Ywf9ToArffcyjGzTOpUladsjZfGQDk3/Ro+n1dWd8kXXKVy4gAEJcXeSgfy9 aY9HSIkiKm8fzY0GPQndWagOiub94KI2UnaV4xRXnP45YXHvjY3vvXjSrOXXCkMMWqX97lieQO6mH PCm9jx0DPtKB2lid/mC7YMlEUyJyie1mcCQUh8WX1Dd3v6d9jdbBTgvBv+nnS6792PnOkaYqynhVt LvxHppE9IOE+LWhP8zcVC+LAPNHISoevg/2QWIYhrk7o2iqX1Fpsnb9zQHcqh7NjtdZyjWQevW6kr r/hx7OexA/H2lQ==; Date: Sun, 10 Aug 2025 08:23:35 +0300 Message-Id: <86zfc7kaw8.fsf@gnu.org> From: Eli Zaretskii To: Elijah Gabe =?utf-8?Q?P=C3=A9rez?= In-Reply-To: <87jz3cuinz.fsf@gmail.com> (message from Elijah Gabe =?utf-8?Q?P=C3=A9rez?= on Sat, 09 Aug 2025 18:25:36 -0600) Subject: Re: bug#77544: (WIP) [PATCH] Prettify page separators. References: <87bjtbyzg1.fsf@gmail.com> <86ldsfxdhy.fsf@gnu.org> <87zfgucwhp.fsf@gmail.com> <87h631pyjg.fsf@gmail.com> <867c3xvj9a.fsf@gnu.org> <87cydppodp.fsf@gmail.com> <8634elv9n9.fsf@gnu.org> <87o6spf5e8.fsf@gmail.com> <86fre0n8hm.fsf@gnu.org> <87jz3cuinz.fsf@gmail.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77544 Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org, visuweshm@gmail.com X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Elijah Gabe Pérez > Cc: gerd.moellmann@gmail.com, 77544@debbugs.gnu.org, visuweshm@gmail.com > Date: Sat, 09 Aug 2025 18:25:36 -0600 > > >> My solution was to make a kind of hack to display the underline as > >> strike-through, and it worked. > > > > Why is it a problem to show a normal underline? > > Actually it is more for stylistic reasons than anything else, many third > party packages that implement this functionality always use the > strike-through property, never underline (mainly to show it as a > horizontal rule), to mention a few: form-feed, form-feed-st, > page-break-lines, and org-modern. > > Some users or themes may prefer to use the same styles that underline > now provides (for this horizontal rule), which however are not available > in strike-through, to maintain this consistency, if the face has the > underline property, it will be displayed as if it were a strike-through, > otherwise it will be displayed normally. I still ask why not show a normal underline? why do we need to install kludges just because other packages do something? (And this is even before we test the kludge on all supported terminal types and see what it yields.) Emacs code should provide clean implementations, with as few kludges as possible and only where nothing else will solve the problem. This is not that case, is it? Did you try to use the same trick as we do in the definition of the log-edit-headers-separator face? It is known to work on all GUI terminals, and looks quite pretty. > >> Optionally, I've added a new minor mode to enable this outside > >> whitespace-mode (an example of use in this would be in the NEWS file or > >> in *Compile-Log* buffers). > > > > I'm not sure it is justified to have a separate mode for this. > > I don't see why not, whitespace.el have 'whitespace-newline-mode', which > is only used for toggle the newline visualization. But whitespace-newline-mode can only be activated if whitespace-mode is active, right? > > Is it wise to support this minor mode outside of whitespace-mode? Why > > shouldn't this work only if whitespace-mode is ON? It complicates the > > implementation, and adds 'display' properties to font-lock-keywords, > > but I don't quite see the justification. > > A better alternative is to make this minor mode act as > 'whitespace-newline-mode', to toggle the visibility of page delimiters > if whitespace-mode is activated, otherwise, activate whitespace-mode to > only display them. Yes.