|
|
from IPython.genutils import Term,warn,error,flag_calls, ask_yes_no
|
|
|
|
|
|
import thread,inspect
|
|
|
|
|
|
try:
|
|
|
import ctypes
|
|
|
HAS_CTYPES = True
|
|
|
except ImportError:
|
|
|
HAS_CTYPES = False
|
|
|
|
|
|
|
|
|
# Globals
|
|
|
# global flag to pass around information about Ctrl-C without exceptions
|
|
|
KBINT = False
|
|
|
|
|
|
# global flag to turn on/off Tk support.
|
|
|
USE_TK = False
|
|
|
|
|
|
# ID for the main thread, used for cross-thread exceptions
|
|
|
MAIN_THREAD_ID = thread.get_ident()
|
|
|
|
|
|
# Tag when runcode() is active, for exception handling
|
|
|
CODE_RUN = None
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# This class is trivial now, but I want to have it in to publish a clean
|
|
|
# interface. Later when the internals are reorganized, code that uses this
|
|
|
# shouldn't have to change.
|
|
|
|
|
|
|
|
|
if HAS_CTYPES:
|
|
|
# Add async exception support. Trick taken from:
|
|
|
# http://sebulba.wikispaces.com/recipe+thread2
|
|
|
def _async_raise(tid, exctype):
|
|
|
"""raises the exception, performs cleanup if needed"""
|
|
|
if not inspect.isclass(exctype):
|
|
|
raise TypeError("Only types can be raised (not instances)")
|
|
|
res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid,
|
|
|
ctypes.py_object(exctype))
|
|
|
if res == 0:
|
|
|
raise ValueError("invalid thread id")
|
|
|
elif res != 1:
|
|
|
# """if it returns a number greater than one, you're in trouble,
|
|
|
# and you should call it again with exc=NULL to revert the effect"""
|
|
|
ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, 0)
|
|
|
raise SystemError("PyThreadState_SetAsyncExc failed")
|
|
|
|
|
|
def sigint_handler (signum,stack_frame):
|
|
|
"""Sigint handler for threaded apps.
|
|
|
|
|
|
This is a horrible hack to pass information about SIGINT _without_
|
|
|
using exceptions, since I haven't been able to properly manage
|
|
|
cross-thread exceptions in GTK/WX. In fact, I don't think it can be
|
|
|
done (or at least that's my understanding from a c.l.py thread where
|
|
|
this was discussed)."""
|
|
|
|
|
|
global KBINT
|
|
|
|
|
|
if CODE_RUN:
|
|
|
_async_raise(MAIN_THREAD_ID,KeyboardInterrupt)
|
|
|
else:
|
|
|
KBINT = True
|
|
|
print '\nKeyboardInterrupt - Press <Enter> to continue.',
|
|
|
Term.cout.flush()
|
|
|
|
|
|
else:
|
|
|
def sigint_handler (signum,stack_frame):
|
|
|
"""Sigint handler for threaded apps.
|
|
|
|
|
|
This is a horrible hack to pass information about SIGINT _without_
|
|
|
using exceptions, since I haven't been able to properly manage
|
|
|
cross-thread exceptions in GTK/WX. In fact, I don't think it can be
|
|
|
done (or at least that's my understanding from a c.l.py thread where
|
|
|
this was discussed)."""
|
|
|
|
|
|
global KBINT
|
|
|
|
|
|
print '\nKeyboardInterrupt - Press <Enter> to continue.',
|
|
|
Term.cout.flush()
|
|
|
# Set global flag so that runsource can know that Ctrl-C was hit
|
|
|
KBINT = True
|
|
|
|
|
|
def run_in_frontend(src):
|
|
|
""" Check if source snippet can be run in the REPL thread, as opposed to GUI mainloop
|
|
|
|
|
|
(to prevent unnecessary hanging of mainloop).
|
|
|
|
|
|
"""
|
|
|
|
|
|
if src.startswith('_ip.system(') and not '\n' in src:
|
|
|
return True
|
|
|
return False
|
|
|
|
|
|
|
|
|
|
|
|
|
