Re: Redisplay issues
>>>> "Aidan" == Aidan Kehoe
<kehoea(a)parhasard.net> writes:
Aidan> Ar an seachtú lá déag de mí Iúil, scríobh Raymond Toy:
First, sorry for the long delay! My apologies.
> I've had minor redisplay issues for a very long time where
sometimes
> when I C-v parts of the old line are displayed instead of the
> new. This was fairly rare.
Aidan> Yes, I’ve seen similar issures. Usually the trailing half or third of the
line
Aidan> above, displayed left-justified above the line that should be displayed.
Actually, I see whole rectangles missing sometimes, or rectangles
misplaced.
> However, in the last couple of months, this has become much
> worse. C-v around a large file ends up with incorrect lines being
> displayed. I haven't really changed anything on my end, but I have
> updated xemacs to the most recent code along with various updates to
> the packages.
Aidan> I’m surprised at that.
Aidan> The code I added changing to extents rather than markers for the window
point
Aidan> cache may, possibly, remotely, have something to do with this. Ben didn’t
seem
Aidan> to have got feedback on the window point code when he wrote it and it
wasn’t
Aidan> that exhaustively documented (though getting on to a decade and a half of
Aidan> testing with few bugs does imply it’s decent code.)
I'd didn't mean to say recent changes are the cause. It's just when I
noticed it the most.
However, it seems to be related to font-lock. I have a file now that
shows all kinds of weird effects when I C-v/M-v around. When I turn
off font-lock, these issues go away. Or are at least much less likely
to happen. Note that I might have an unusual setup. I set up
font-lock to use fonts (not colors), but I edited some of the fonts
used by font-lock to have a bit of color. And I use normally use
lazy-lock so perhaps the timers or whatever in lazy-lock are messing
things up. Otherwise, I don't see why redisplay would be triggered
(without any interaction from me) to fix the bad display sometimes.
> Footnotes:
> [1] I reported this before, but on startup the window is big and I
> change my font in my xemacs to BitStream Vera Sans. The window
> shrinks in size. I click on the window and it suddenly gets wider
> but not everything is wider. XEmacs still thinks the window is
> not that wide. When I manually drag the right window edge,
> everything is resized correctly and things are working with the
> correct window size now.
Aidan> Yes, that’s well-known too. Workaround is usually to use your ~/.Xdefaults
Aidan> rather than ~/.xemacs/init.el to specify the font.
I thought that wasn't possible if you're using xft.
--
Ray
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