Imagine a screen layout like this:
11111111
11111111
11111111
222222 <--- xmobar here
222222
222222
When placing xmobar as indicated, the partial strut property indicates that an
entire height of screen 1 is covered by the strut, as well as a few lines at
the top of screen 2. The original code would create a screen rectangle of
negative height and wreak havoc. This patch causes such strut to be ignored on
the screen it covers entirely, resulting in the desired behaviour of a small
strut at the top of screen 2.
Please note that this semantics of _NET_WM_STRUT and _NET_WM_STRUT_PARTIAL is
different to what is in wm-spec. The "correct" thing to do would be to discard
the covered portion of screen 1 leaving two narrow areas at the sides, but
this new behaviour is probably more desirable in many cases, at least for
xmonad/xmobar users.
The correct solution of having separate _NET_WM_STRUT_PARTIAL for each
Xinerama screen was mentioned in wm-spec maillist in 2007, but has never
really been proposed, discussed and included in wm-spec. Hence this "hack".
This patch will remove snapping against unmanaged windows, but instead calculate a new rectangle with all gaps (computed by ManageDocks) removed. This new rectangle is used to snap against. (Both the inside and outside of the rectangle.)
This will remedy the issue of snapping against multiple layers of the same window, additionally there will be no snap-points between windows on the same side. So if you are running two dzen side by side with half the screen each. You will not automatically have a snap-point in the middle.
Naturally, this patch will change which function is exported from ManageDocks.
I've now tested this module, and it works on x86--but doesn't work on
x86-64, because ManageDocks doesn't work on 64-bit. But in any case, it
works almost perfectly, with no user intervention needed (and no special
hooks). The only catch is that it doesn't notice when a panel disappears,
so the layout won't adjust until the next refresh (e.g. if you change
focus, layout or workspace).
