Re: [9front] acme hides top windows after loading a dump file

[Xiao-Yong Jin <meta.jxy@gmail.com>]

Thanks.  There is still one issue with loading the dump file.
After two or more windows are dumped together, when loading
the dump file, all the windows apart from the top one move
up one line.  Effectively the topmost window got shrunk one
line, and the bottommost window got expanded one line.

> On Mar 15, 2022, at 3:34 AM, igor@9lab.org wrote:
> 
> To reliably reproduce the behaviour the window that acme is started in
> requires a certain size:
> 
>  % window -dx 913 -dy 606  'acme -l /tmp/test.dump'
> 
> Tested the fix; will push it later today.
> 
> Thanks for the report and the patch!
> 
> Quoth Xiao-Yong Jin <meta.jxy@gmail.com>:
>> When loading a dump file contains a window with an only tag line, acme hides that window.
>> Here is a simple dump file reproduces this issue.
>> 
>> #### dump file begins ####
>> /tmp
>> /lib/font/bit/pelm/unicode.8.font
>> /lib/font/bit/pelm/unicode.8.font
>>          0
>> f          0           5         175         175           1 
>>          5          40         175           1           0 /sys/src/cmd/acme/ Del Snarf Get | Look 
>> f          0           4         330         330           3 
>>          4          27         330           1           0 /tmp/ Del Snarf Get | Look 
>> #### dump file ends ####
>> 
>> This issue is introduced in commit 47b7dc5ccd77bc247ab15cfab3a7a8f955771c70
>> 
>> Reinstate two lines as the patch below fix the issue.
>> 
>> diff ca313087c1715a0331a58c01ad104632d366f057 uncommitted
>> --- a/sys/src/cmd/acme/wind.c
>> +++ b/sys/src/cmd/acme/wind.c
>> @@ -188,6 +188,8 @@
>>                w->taglines = wintaglines(w, r);
>>                r1.max.y = min(r.max.y, r1.min.y + w->taglines*font->height);
>>        }
>> +       if(Dy(r1) < font->height)
>> +               r1.max.y = r1.min.y+font->height;
>>        /* If needed, resize & redraw tag. */
>>        y = r1.max.y;
>>        if(!safe || !w->tagsafe || !eqrect(w->tag.r, r1)){
>> 
>