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* bug#37563: 27.0.50; fit-frame-to-buffer does not account for line-spacing
@ 2019-09-30 18:41 Ingo Lohmar
  2019-10-01  7:32 ` martin rudalics
                   ` (2 more replies)
  0 siblings, 3 replies; 24+ messages in thread
From: Ingo Lohmar @ 2019-09-30 18:41 UTC (permalink / raw)
  To: 37563


I noticed the behavior due to company-posframe, which uses the posframe
package to show a completion popup frame.  The frame size is set using
window.el's `fit-frame-to-buffer'.  Some time ago, the call was changed
to provide the explicit frame max-height in terms of lines, which
exposed the following behavior:

If (default-value line-spacing) is the usual 0, the height of the popup
frame is correct, ie, all lines are fully shown.  If, however,
(default-value line-spacing) is 1 or larger (as in my setup), the bottom
of the popup frame cuts off parts of the lowest line.

I do not understand all the details, but it here's what my debugging
shows: 

1) When max-height is provided, the actual frame height is calculated in
ll 8736ff of window.el (as of commit
5746202c182a9c69c732beb29b8507a6e6364799), and that just multiplies by
the char-height, which excludes the line-spacing.  This is the buggy
case.

2) When max-height is NOT provided, the above lines set max-height to
the total (parent frame) height, and the popup frame size is calculated
only when reaching l 8767.  This yields a larger height, correctly
accounting for the line-spacing.

Hope this helps and can be easily fixed.  Thanks!

Ingo


In GNU Emacs 27.0.50 (build 24, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2019-02-16 built on kenko
Repository revision: aff0c585060b7cc92d52a32978c6aa64cf7e2a5e
Repository branch: master
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^ permalink raw reply	[flat|nested] 24+ messages in thread

end of thread, other threads:[~2019-10-11 17:50 UTC | newest]

Thread overview: 24+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-09-30 18:41 bug#37563: 27.0.50; fit-frame-to-buffer does not account for line-spacing Ingo Lohmar
2019-10-01  7:32 ` martin rudalics
     [not found]   ` <87lfu4aook.fsf@kenko.localhost.com>
2019-10-01  8:10     ` martin rudalics
2019-10-01  8:28       ` Ingo Lohmar
2019-10-02  8:54         ` martin rudalics
2019-10-03  8:15           ` martin rudalics
2019-10-03  8:48             ` Ingo Lohmar
2019-10-03 18:10               ` martin rudalics
2019-10-03 18:21                 ` Ingo Lohmar
2019-10-05  8:41                   ` martin rudalics
2019-10-05  9:05                     ` Ingo Lohmar
2019-10-07  9:25                       ` martin rudalics
2019-10-07 17:45                         ` Ingo Lohmar
2019-10-08  8:44                           ` martin rudalics
2019-10-11  8:16                             ` martin rudalics
2019-10-11 17:45                               ` Ingo Lohmar
2019-10-03  8:56             ` Ingo Lohmar
2019-10-03  9:12               ` Robert Pluim
2019-10-03 16:09               ` Eli Zaretskii
2019-10-03 18:10               ` martin rudalics
2019-10-03 18:22                 ` Ingo Lohmar
2019-10-01  7:39 ` bug#37563: [PATCH] please review Ingo Lohmar
2019-10-02  8:53   ` martin rudalics
     [not found] ` <handler.37563.B.156987198814967.ack@debbugs.gnu.org>
2019-10-11 17:50   ` bug#37563: Acknowledgement (27.0.50; fit-frame-to-buffer does not account for line-spacing) Ingo Lohmar

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