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bug#16923: 24.3.50; reression: `set-frame-size' loses mode line
From: |
Drew Adams |
Subject: |
bug#16923: 24.3.50; reression: `set-frame-size' loses mode line |
Date: |
Thu, 6 Mar 2014 10:25:30 -0800 (PST) |
> > I was pretty sure that the mode line also disappears in some cases
> > when moving to a different node. But I definitely do not see that
> > now, so I guess I was mistaken about that.
>
> (1) The mode line disappears only when the frame size remains the same.
> Check this please via the arguments you pass (to `set-frame-size' or
> whatever you use).
>
> (2) Everything else is drawn correctly, there's no area with background
> space only, as you claimed earlier.
>
> Is that correct (from your experience, so far)? You might want to
> attach a screenshot.
Yes, that is what I was saying. However, testing by printing the sizes
as messages shows that I was wrong (once again). The mode line can
disappear, it seems, either when the size is the same or when it
increases.
Here are some debug messages, where ====== means the size was not changed
and /////// means that it was changed. The old and new sizes are also
noted.
These resizings were not associated with losing the mode line:
CUR: (81 63)
NEW: (76 63)
//////////////////////
CUR: (76 61)
NEW: (81 63)
//////////////////////
These, immediately after those, were:
CUR: (81 61)
NEW: (81 63)
//////////////////////
CUR: (81 63)
NEW: (81 63)
====================
That is, the mode line was lost when the height changed from 61 to 63,
and it remained lost when the size was not changed, on the next call
to `set-frame-size'.
In the following sequence of resizings, starting with a visible mode
line, only this change caused the mode line to disappear. And it
reappeared at the next resizing.
CUR: (72 20)
NEW: (72 22)
----------------
CUR: (81 63)
NEW: (72 63)
//////////////////////
CUR: (72 61)
NEW: (72 53)
//////////////////////
CUR: (72 51)
NEW: (72 62)
//////////////////////
CUR: (72 60)
NEW: (72 63)
//////////////////////
CUR: (72 61)
NEW: (72 22)
//////////////////////
CUR: (72 20)
NEW: (72 22)
//////////////////////
CUR: (72 22)
NEW: (72 47)
//////////////////////
---------------
That was using Info. Note that though the `height' parameter value was
slightly increased when the mode line was lost, I saw no apparent change
in the frame size. Dunno what that means.
> > Actually, now I can repro it more simply, without using Info. In my
> > setup, if I do M-: (fit-frame) more than once in the same frame, the
> > mode line sometimes disappears. For most buffers/frames, it disappears.
> > But not always. It does not disappear for `list-faces-display', for
> > some reason. (It does disappear for `list-colors-display'.)
With this test of repeating M-: (fit-frame), this is what I see. The
(240 2) messages are from inputting (fit-frame) into the minibuffer frame,
for M-:. The minibuffer frame is 240 chars wide and 2 chars high.
Evaluating...
CUR: (95 62)
NEW: (95 73)
//////////////////////
Buffer `*Pp Eval Output*' is in mode `Emacs-Lisp'. For info on the mode: `C-h
m'.
nil
CUR: (240 2)
NEW: (240 2)
====================
Evaluating...
CUR: (95 71)
NEW: (95 73)
//////////////////////
Buffer `*Pp Eval Output*' is in mode `Emacs-Lisp'. For info on the mode: `C-h
m'.
nil
Again, there was no apparent change in the frame height, in spite of the
change in `height' parameter value. The first frame-fit, from height 62
to 73, did represent a size change. The second, from 71 to 73, did not
show any size change. The only change I noticed was the mode line
disappearing.
> Add the following function to your .emacs ...
>
> (defun window--resize-root-window
> (window delta horizontal ignore pixelwise)
> ...)
>
> ... and post the contents of the buffer *window-frame-dump* after a
> fatal resize operation here (but make sure to not resize any frame again
> _before_ getting hold of that buffer's contents!!!).
I tried that, but buffer *window-frame-dump* never was filled with any
text. And I never saw any "fatal resize". IOW, evaluating that defun
did not have any effect that I noticed. I did still continue to
observe the behavior I have recorded above, however. IOW, the mode line
continued to disappear in the same way, with no changes that I could
see.
Do I need to do something more than just evaluate that defun? Do
I need to restart Emacs and do that first or something? (You mentioned
putting it in .emacs, instead of just evaluating it. I just evaluated
it.)
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, (continued)
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Juanma Barranquero, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/05
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/06
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line,
Drew Adams <=
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/06
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/06
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/06
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/06
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/07
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/07
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/07
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/07
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, martin rudalics, 2014/03/07
- bug#16923: 24.3.50; reression: `set-frame-size' loses mode line, Drew Adams, 2014/03/07