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Re: Tick Reduction
From: |
Lars Ingebrigtsen |
Subject: |
Re: Tick Reduction |
Date: |
Wed, 24 Nov 2021 18:50:45 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
> There's the display_prop_end function we normally use for that.
I don't quite understand. If I have a max-width going from 5 to 15,
and a height going from 10 to 12, I think this function is going to be
called at 5, 10, 12 and 15? I need to know that this consecutive series
of characters ends at 15.
It's the same issue when called from display_string -- the mode line
machinery will call the function several times, even if the :propertize
is around all the specs.
> I guessed that much, but again: if you just want to test that you are
> called from display_string, the test STRINGP (object) should be
> enough.
Ah, I see.
> And I'm confused by the fact that for buffers you test
>
> if (bufpos > BEGV && EQ (FOO, BAR))
>
> whereas for a string you test
>
> if (bufpos == 0 && !EQ (FOO, BAR))
The bufpos == 0 is just testing that we're being called from the mode
line (where it's always 0).
> The equivalent of BEGV in strings is zero, so I'd expect
>
> if (bufpos > 0
>
> and also why is the first case tests equality, whereas the second one
> tests INequality?
Looks correct to me -- one is testing the start of the range and one is
testing whether we're at the end.
> IOW, the issue here AFAIU is that you might be called to display
> buffer text with this property or to display a Lisp string with this
> property, so the tests should be equivalent, and the only difference
> between strings and buffers is that text starts at BEGV in buffers but
> at zero in strings. So why there are more differences that that?
> What am I missing?
Like I said, there's no strings -- only buffers and mode lines. I.e.,
this doesn't work:
(string-pixel-width (propertize "foo" 'display '(min-width (1000))))
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- Re: Tick Reduction, (continued)
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/23
- Re: Tick Reduction, Eli Zaretskii, 2021/11/23
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/23
- Re: Tick Reduction, Eli Zaretskii, 2021/11/23
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/24
- Re: Tick Reduction, Eli Zaretskii, 2021/11/24
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/24
- Re: Tick Reduction, Eli Zaretskii, 2021/11/24
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/24
- Re: Tick Reduction, Eli Zaretskii, 2021/11/24
- Re: Tick Reduction,
Lars Ingebrigtsen <=
- Re: Tick Reduction, Eli Zaretskii, 2021/11/24
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/24
- Re: Tick Reduction, Eli Zaretskii, 2021/11/24
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/25
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/25
- Re: Tick Reduction, Eli Zaretskii, 2021/11/25
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/25
- Re: Tick Reduction, Eli Zaretskii, 2021/11/25
- Re: Tick Reduction, Lars Ingebrigtsen, 2021/11/26
- Re: Tick Reduction, Eli Zaretskii, 2021/11/26