GNU bug report logs - #37563
27.0.50; fit-frame-to-buffer does not account for line-spacing

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From: martin rudalics <rudalics <at> gmx.at>
To: Ingo Lohmar <ingo.lohmar <at> posteo.net>
Cc: 37563 <at> debbugs.gnu.org
Subject: bug#37563: 27.0.50; fit-frame-to-buffer does not account for line-spacing
Date: Mon, 7 Oct 2019 11:25:52 +0200

[Message part 1 (text/plain, inline)]

I now came up with a fix for 'fit-window-to-buffer' too which had some
strange misbehavior with different size restricting arguments when the
window's text size did not change.  See attached diffs and Change Log
below.

> I think I understand better now, I was hampered by some weird debugging
> artifacts in my current setup.  With the default
> `frame-resize-pixelwise' of nil, and the otherwise bug-fixed code,
> nothing is cut off, but there is some slack whitespace, indeed.

I suppose that part of that whitespace comes from the fact that with
'line-spacing' greater zero, 'window-text-pixel-size' includes the
space below the last line of its text.  It would be nice to get rid of
that but ISTR that a line's text may now get centered within the space
reserved for it.  So I cannot just remove the entire line space of one
line from the return value but probably only half of the line spacing
value.  How would I know the right value?

martin


Fixes for fitting windows and frames to their buffers (Bug#37563)

* lisp/window.el (window-default-font-height)
(window-default-line-height): New functions.
(fit-frame-to-buffer): Interpret values of MAX-HEIGHT and
MIN-HEIGHT arguments in terms of WINDOW's default line height
(Bug#37563).
(fit-window-to-buffer): Obey size restricting arguments even
when size of WINDOW's text does not change.  Do not
temporarily select WINDOW and perform height/width related
calculations if and only if WINDOW is accordingly combined.
Interpret values of MAX-HEIGHT and MIN-HEIGHT arguments in
terms of WINDOW's default line height.

[fit-to-buffer.diffs (text/plain, attachment)]

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