* macterm.c (XTmouse_position): Check wp with is_emacs_window.
(Vmac_pass_command_to_system): New variable.
(Vmac_pass_control_to_system): New variable.
(do_mouse_moved): Check wp with is_emacs_window.
(XTread_socket): Check window_ptr with is_emacs_window. Call
FrontNonFloatingWindow instead of FrontWindow. Send keydown
events back to Mac Toolbox for processing, depending on values of
Vmac_pass_command_to_system and Vmac_pass_control_to_system.
(syms_of_macterm): DEFVAR_LISP Vmac_pass_command_to_system and
Vmac_pass_control_to_system.