m_client.focus() might call ~ClientMenuItem(), thus m_client is not available anymore. the crash was triggered by trying to deiconify a client via the clientmenu. this triggers a signal to remove and destroy the current ClientMenuItem.
warping a transient window to the next workspace creates a cycle between
BScreen::changeWorkspaceID(), BScreen::reassociateWindow(), Workspace::removeWindow(),
FocusControl::unfocusWindow(), FluxboxWindow::setCurrentClient(), FluxboxWindow::focus()
and so on.
for now we just stop allowing transient windows to be warped, it is most
likely a bad idea anyway having the modal dialog on one workspace and the
(dead) main window on another one.
this issue must be analyzed further, since there might be a deeper problem
with the way the focus code works.
FbTk::Menu::updateMenu() recalculates the width() and height() of the
window. this must be done before the menu is moved to fit completely
onto the screen.
the 'menu().raise()' command is not needed, that is done inside
'menu().show()' already.
The issue was caused by a client that got an unmap notify and had a FocusIn event
directly after in the event queue. The focus in event was handled by Fluxbox::revertFocus
before the WinClient.cc removed itself from the search window list.
WindowMenuAccessor returned strange alpha values if compiled
with 'g++ -Os'; unholy black magic happens if template<int> faces
functions returning only 'usigned char'.
With ROT90-SystemTray fluxbox crashed. It is a bit unclear of where
to catch pixmaps / windows with either width or height equal to 0; IMHO
this needs more investigation.
nxserver-3.x creates a XExposeEvent for the unmapped FbTk::Menu(), which is
not configured completely yet (hence unmapped). this causes a call to
FbTk::Menu::clearItem() which then uses a value of 0 for m_rows_per_column
to divide the current index which triggers a SIGFPE.
it is still unclear, why nxserver-3.x creates the XExposeEvent for the
unmapped (menu) window. doing nothing if the menu is unmapped 'fixes'
the problem for now.
many thanks to Lars Engels (bsd-geek.de) to assist me in debugging this
issue.
a newer xlib recently changed the result of 'DisplayString()' a little bit:
instead of returning ':0.0' or ':1.0' it yields ':0' or ':1'. our code to
transform this string into something that includes the currently used
Screen worked only on something like ':0.0'.
we now find the '.' after the ':' and strip that part away.
by using FbCommands::ExecureCmd() we run 'fluxbox-update_configs' in
the bacground while booting a new fluxbox instance already. 'system()'
waits until 'fluxbox-update_configs' is done and then gives the control
back to fluxbox.
