From: Eli Zaretskii <eliz@gnu.org>
To: Yuan Fu <casouri@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: Add a function that returns pixel distance between points?
Date: Sun, 31 Jan 2021 05:31:11 +0200 [thread overview]
Message-ID: <837dnt9400.fsf@gnu.org> (raw)
In-Reply-To: <960DAE7C-A1AF-416A-ACA5-F6674C87A2C9@gmail.com> (message from Yuan Fu on Sat, 30 Jan 2021 15:47:38 -0500)
> From: Yuan Fu <casouri@gmail.com>
> Date: Sat, 30 Jan 2021 15:47:38 -0500
>
> For aligning text according to their display size, I need to calculate the width of some text. Currently I’m using window-text-pixel-size, but it has some problem: if the text I’m measuring has line-prefix or wrap-prefix, the size returned will include the width of the prefix. So if the prefix is 14 pixels wide and the text is 7 pixels wide, the returned value is 21 instead of 7. Line number width is sometimes included in the result and sometimes not.
>
> There is also posn-at-point but that requires the point to be visible in the window. My alignment function wants to run in jit-lock so point is not always visible, so I can’t use posn-at-point.
Please explain what you mean by "align text according to display
size". It isn't clear what you want to accomplish, and therefore the
full set of requirements and restrictions is not evident, which makes
it hard to provide useful advice.
next prev parent reply other threads:[~2021-01-31 3:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-30 20:47 Add a function that returns pixel distance between points? Yuan Fu
2021-01-31 3:31 ` Eli Zaretskii [this message]
2021-01-31 5:17 ` Yuan Fu
2021-01-31 5:52 ` Ihor Radchenko
2021-01-31 19:42 ` Yuan Fu
2021-01-31 15:24 ` Eli Zaretskii
2021-01-31 19:41 ` Yuan Fu
2021-01-31 20:13 ` Eli Zaretskii
2021-02-01 14:16 ` Yuan Fu
2021-02-01 18:22 ` Eli Zaretskii
2021-02-01 23:00 ` Yuan Fu
2021-02-02 16:29 ` Eli Zaretskii
2021-02-03 15:04 ` Eli Zaretskii
2021-02-03 16:48 ` Yuan Fu
2021-02-04 16:02 ` Eli Zaretskii
2021-02-05 10:15 ` martin rudalics
2021-02-05 12:25 ` Eli Zaretskii
2021-02-05 15:48 ` martin rudalics
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