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bug#2749: 23.0.91; Visual Line Mode: incorrect line wrapping in corner c


From: Stephen Berman
Subject: bug#2749: 23.0.91; Visual Line Mode: incorrect line wrapping in corner case
Date: Fri, 10 May 2013 17:49:40 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

On Fri, 10 May 2013 17:59:43 +0300 Eli Zaretskii <address@hidden> wrote:

>> From: Stephen Berman <address@hidden>
>> Date: Fri, 10 May 2013 16:01:22 +0200
>> Cc: pent <address@hidden>, address@hidden
>> 
>> I've been using Emacs as described above (i.e., with the patch below)
>> and till today have had no problems, but I just bumped into one, which
>> is indeed confusing, even pretty nasty.  I've reproduced it with -Q on a
>> fresh build from the latest trunk (with the patch added).  I don't know
>> how to debug it, but I will describe how to reproduce it, in the hope
>> that someone can fix it (or at least give me some help in trying to
>> debug it) and then hopefully overflow-newline-into-fringe can be allowed
>> in Visual Line mode.
>
> Does the patch below fix the problem (and whatever original problem
> that led you to this recipe)?
>
> --- src/xdisp.c~0     2013-05-10 17:56:44.338000000 +0300
> +++ src/xdisp.c       2013-05-10 17:57:07.197375000 +0300
> @@ -8466,7 +8466,8 @@
>                                  && it->bidi_it.paragraph_dir == R2L)
>                                 ? WINDOW_LEFT_FRINGE_WIDTH (it->w)
>                                 : WINDOW_RIGHT_FRINGE_WIDTH (it->w)) == 0
> -                           || IT_OVERFLOW_NEWLINE_INTO_FRINGE (it))
> +                           || (IT_OVERFLOW_NEWLINE_INTO_FRINGE (it)
> +                               && it->line_wrap != WORD_WRAP))
>                           {
>                             if (!get_next_display_element (it))
>                               {

Yes, it fixes the "confusing results" with the patch in my previous
mail.  Thanks very much!  (I wish I understood why this problem occurred
and how your patch fixes it...)  Unless someone knows of another problem
with allowing overflow-newline-into-fringe in Visual Line mode, I would
like to request that both my patch and yours be committed to the trunk;
I can do that if I'm given the go-ahead.  Then I think this bug could be
closed.

Steve Berman





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