Re: modify-frame-parameters with floating point offsets

[martin rudalics]

> OK, is this normal?
>
> emacs -Q
> (modify-frame-parameters nil '((left .   0.0)))
> (frame-geometry)
>
> => ((outer-position -20 . 188) (outer-size 1208 . 1226)
>     (external-border-size 20 . 20) (outer-border-width . 0)
>     (title-bar-size 0 . 70) (menu-bar-external . t) (menu-bar-size 1168
>     . 24) (tool-bar-external . t) (tool-bar-position . top) (tool-bar-size
>     1168 . 42) (internal-border-width . 0))
>
> The frame is visually flush with the left edge of the screen, but
> frame-geometry claims itʼs at -20 ?

Is the left external border clearly visible?

> For comparison, after toggle-frame-fullscreen
>
> ((outer-position 0 . 0) (outer-size 3840 . 2160) (external-border-size
> 0 . 0) (outer-border-width . 0) (title-bar-size 0 . 0)
> (menu-bar-external . t) (menu-bar-size 3840 . 24) (tool-bar-external
> . t) (tool-bar-position . top) (tool-bar-size 3840 . 42)
> (internal-border-width . 0))
>
> So is this the window manager lying to us? This is with XWayland, Iʼll
> see if I can test under vanilla X.

A fullscreen frame usually doesn't have external borders.  Maximized
frames do but they are off-screen.  So these values seem normal to me.

martin