* Highlight text
@ 2022-02-09 13:38 Anand Tamariya
2022-02-09 14:05 ` Eric S Fraga
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Anand Tamariya @ 2022-02-09 13:38 UTC (permalink / raw)
To: Emacs Devel
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Can somebody point me to a piece of code in the display engine which is
responsible for highlighting text upon selection? Or the general logic on
what causes it to display in a different face than normal text?
Thanks.
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Highlight text 2022-02-09 13:38 Highlight text Anand Tamariya @ 2022-02-09 14:05 ` Eric S Fraga 2022-02-09 14:48 ` Eli Zaretskii 2022-02-09 15:41 ` Stefan Monnier 2 siblings, 0 replies; 6+ messages in thread From: Eric S Fraga @ 2022-02-09 14:05 UTC (permalink / raw) To: emacs-devel On Wednesday, 9 Feb 2022 at 19:08, Anand Tamariya wrote: > Can somebody point me to a piece of code in the display engine which is > responsible for highlighting text upon selection? Or the general logic on > what causes it to display in a different face than normal text? It's the "region" face? I don't know where the code that makes the selected text use that face, mind you. -- Eric S Fraga with org 9.5.2 in Emacs 29.0.50 on Debian 11.2 ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Highlight text 2022-02-09 13:38 Highlight text Anand Tamariya 2022-02-09 14:05 ` Eric S Fraga @ 2022-02-09 14:48 ` Eli Zaretskii 2022-02-09 15:41 ` Stefan Monnier 2 siblings, 0 replies; 6+ messages in thread From: Eli Zaretskii @ 2022-02-09 14:48 UTC (permalink / raw) To: Anand Tamariya; +Cc: emacs-devel > From: Anand Tamariya <atamariya@gmail.com> > Date: Wed, 9 Feb 2022 19:08:54 +0530 > > Can somebody point me to a piece of code in the display engine which is responsible for highlighting text > upon selection? Or the general logic on what causes it to display in a different face than normal text? It's not in the display engine (it was once). It's in simple.el, see redisplay--update-region-highlight there. Basically, we nowadays implement region highlight as an overlay. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Highlight text 2022-02-09 13:38 Highlight text Anand Tamariya 2022-02-09 14:05 ` Eric S Fraga 2022-02-09 14:48 ` Eli Zaretskii @ 2022-02-09 15:41 ` Stefan Monnier 2022-02-11 4:11 ` Anand Tamariya 2 siblings, 1 reply; 6+ messages in thread From: Stefan Monnier @ 2022-02-09 15:41 UTC (permalink / raw) To: Anand Tamariya; +Cc: Emacs Devel > Can somebody point me to a piece of code in the display engine which is > responsible for highlighting text upon selection? It's not in the display engine (any more). It's in `redisplay--update-region-highlight`. Stefan ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Highlight text 2022-02-09 15:41 ` Stefan Monnier @ 2022-02-11 4:11 ` Anand Tamariya 2022-02-11 4:46 ` Po Lu 0 siblings, 1 reply; 6+ messages in thread From: Anand Tamariya @ 2022-02-11 4:11 UTC (permalink / raw) To: Stefan Monnier; +Cc: Emacs Devel [-- Attachment #1: Type: text/plain, Size: 549 bytes --] Thanks Eli and Stefan. Your suggestion helped a lot. Missing the ability to see the text that's highlighted can be quite nightmarish. Thankfully it works now. https://lifeofpenguin.blogspot.com/2022/02/zen-emacs.html On Wed, Feb 9, 2022 at 9:12 PM Stefan Monnier <monnier@iro.umontreal.ca> wrote: > > Can somebody point me to a piece of code in the display engine which is > > responsible for highlighting text upon selection? > > It's not in the display engine (any more). > It's in `redisplay--update-region-highlight`. > > > Stefan > > [-- Attachment #2: Type: text/html, Size: 1134 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Highlight text 2022-02-11 4:11 ` Anand Tamariya @ 2022-02-11 4:46 ` Po Lu 0 siblings, 0 replies; 6+ messages in thread From: Po Lu @ 2022-02-11 4:46 UTC (permalink / raw) To: Anand Tamariya; +Cc: Stefan Monnier, Emacs Devel Anand Tamariya <atamariya@gmail.com> writes: > https://lifeofpenguin.blogspot.com/2022/02/zen-emacs.html It's not okay to compare GCs to determine whether or not a string is being drawn in the default face. Lots of code makes ad-hoc modifications to a GC in order to achieve various effects, and I'm sure many of those are done to the normal GC. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-02-11 4:46 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-02-09 13:38 Highlight text Anand Tamariya 2022-02-09 14:05 ` Eric S Fraga 2022-02-09 14:48 ` Eli Zaretskii 2022-02-09 15:41 ` Stefan Monnier 2022-02-11 4:11 ` Anand Tamariya 2022-02-11 4:46 ` Po Lu
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