blackbox

This patch adds minimal Xinerama support to blackbox.
Changes include:
o Compile-time option to enable/disable xinerama support
o Menu and x-resource option to enable/disable xinerama
support
o Do not split menus across physical screens
o Display geometry info in center of current physical
screen
o Separate cascade window placement for each screen,
where the window is placed in whichever screen
contains
the pointer
o Minimal support for xinerama in smart placement -
order
screens by placement ordering, then attempt
placement in
each physical screen.
o Maximize windows fill current physical screen
rather than
all screens
o Allow selection of which physical screen to place
toolbar in
o If slit placement location is not visible, move
slit to closest
physical screen.

This implementation has the following shortcomings:
o For smart placement, it would be better to consider
all
screens at once but still avoid splitting windows
across
screens.
o If full maximization is off, the toolbar and slit
affect
maximization in all physical screens, not just the
screen
that contains the toolbar or slit.
o The toolbar may not be placed on an edge of a physical
screen that does not correspond to the edge of the
logical
screen. For example: if X is configured with a
1024x768
screen right of a 1280x1024 screen, the toolbar may
not be
placed on the bottom of the right (smaller)
screen. This
avoids undesirable maximization behavior resulting
from the
shortcoming listed in the previous bullet.
o Slit placement could be more customizable.

Note: after applying this patch you'll need to issue
the following commands to update the configure script
and related files:
aclocal
automake
autoconf