Currently in Remote App mode we have no option to interact with the
remote desktop host before the first RAIL window is created.
In many situations this interaction possibility is absolutely required.
One example is that screen which gets displayed if another user is logged on.
It requires clicking a button in pre-RAIL mode so that the currently logged
on user gets notified to confirm or deny the connection.
Another example is the option to log on graphically (e.g. for hosts that
don't support NLA) without predefined credentials.
Also if the administrator sets the "User must change password at next logon"
option there is currently no way to do this in TS Remote App mode.
This change basically lets xfreerdp create the main window in Remote App mode
like in a normal session and xfi->remote_app is not set to true initially.
As soon as the rail exec result event or the first rail window creation
request is received (whatever comes first) the main window gets destroyed and
xfi->remote_app is set to true.
The second change is to disconnect immediately if the rail exec result event
reports an error, e.g. if the specified app cannot be found or if it is not
in the list of allowed applications.
This fixes FreeRDP github issue #143 and issue #308.
I'm aware that this is not the most elegant solution but it is definitely an
improvement and probably good enough for 1.0.
A nicer solution would be hiding the main window and only displaying it if
no rail exec result or rail window creation event is received after a certain
timeout ...
Complete implementation for initiating RAIL local move support, however, this is still disabled until a method is found to tell when local moves complete on the X server.
It turns out none of this was necessary. X will handle windows placed partially off-screen and draw them correctly, just as it does for windows dragged partially off the screen to the left. Removing this function fixed a number of drawing issues including tool tips being incorrectly drawn and windows not being drawn correctly after they'd been placed partially off-screen to the right.
Issues:
fast mouse moving after left button pressing is create "windows shake" effect.
Slow mouse speed after left button press allows to discard this effect.
