Problem in temp-buffer-resize-mode

Problem in temp-buffer-resize-mode

[Eli Barzilay]

Try this (using version 22.1.1 on Fedora):

  (set-fringe-mode 1)
  (temp-buffer-resize-mode 1)

and you'll see that temp buffers are not resized.  The problem is that
the small fringe makes (window-width) bigger than (frame-width), which
makes the test in `resize-temp-buffer-window' fail.

-- 
          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                  http://www.barzilay.org/                 Maze is Life!

Re: Problem in temp-buffer-resize-mode

[martin rudalics]

 > Try this (using version 22.1.1 on Fedora):
 >
 >   (set-fringe-mode 1)
 >   (temp-buffer-resize-mode 1)
 >
 > and you'll see that temp buffers are not resized.  The problem is that
 > the small fringe makes (window-width) bigger than (frame-width), which
 > makes the test in `resize-temp-buffer-window' fail.

Thanks for reporting this bug.  In fact a test like

   (=  (frame-width) (window-width))

is used quite frequently in Elisp code and may fail in all these cases
just as it did for you.  FWIW these tests should be replaced by calling
a function `window-full-width-p' (the function `display-buffer' uses to
check whether it should split the largest window).

In any case something is inherently wrong with `frame-width' and
`window-width' if the latter may return a larger value than the former.