Subject: bug#47360: 27.1; using 'bar cursor, mouseclick is rounded to the wrong char position

From: Julian Rohrhuber <[email-masked]>
Date: Sun, 28 Mar 2021 07:15:38 +0000

> On 27. Mar 2021, at 20:47, Eli Zaretskii <[email-masked]> wrote:
>
>
>> Date: Sat, 27 Mar 2021 17:53:41 +0000
>> From: Julian Rohrhuber <[email-masked]>
>> Cc: Lars Ingebrigtsen <[email-masked]>, Eli Zaretskii <[email-masked]>, [email-masked]
>>
>> There is one more case where one can feel the difference: when selecting with the mouse and dragging to the right, the selection jumps to each character a little "too late", that is, after you have already crossed the position you want the selection to end at. You have to point to a character *after* the one you want to include. The current selection always is up to one character behind the cursor barline.  This results in a "sticky" feeling.
>
> Yes, selection in Emacs works on per-character granularity, because it
> uses the faces infrastructure.  We'd need to do something very
> different to make that use pixel granularity.  Patches are welcome.

I don't think that a change of granularity would be necessarily at all to improve what I describe. All what would have to be done is to change at what *cursor* position the selection jumps to the next character (namely when it crosses its middle). So it would only another application of the solution to the current issue.