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Re: The unwarranted scrolling assumption

From: Lennart Borgman
Subject: Re: The unwarranted scrolling assumption
Date: Fri, 18 Jun 2010 19:31:30 +0200

On Fri, Jun 18, 2010 at 6:39 PM, Lennart Borgman
<address@hidden> wrote:
> On Fri, Jun 18, 2010 at 5:35 PM, Eli Zaretskii <address@hidden> wrote:
>>> From: Lennart Borgman <address@hidden>
>>> Date: Fri, 18 Jun 2010 17:08:18 +0200
>>> Cc: address@hidden
>>> You are looking for the reason why reconsider_clip_changes does not do
>>> its job. I have said (though maybe not explicitly enough, I don't
>>> know) that it can't because it does not have the information it needs.
>>> It does not have that information because narrow_to_region has erased
>>> it by setting clip_changed to 1.
>> The information is not erased, it is still present in
>> w->current_matrix->zv and w->current_matrix->begv.  You will see that
>> reconsider_clip_changes uses those to decide whether to reset the
>> clip_changed flag.
> Oh, fine, I missed that. Then we do not need the new variables I introduced.

I have switched to using those variables instead. Seems to work just
as well as my old patch.

I have attached the patches for the current version of xdisp.c I am
using now. Beside using those variable I have moved the check into
reconsider_clip_changes where it belongs.

Attachment: xdisp-jumpscroll-1.diff
Description: Text Data

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