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import asyncio
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import signal
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import sys
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from IPython.core.debugger import Pdb
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from IPython.core.completer import IPCompleter
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from .ptutils import IPythonPTCompleter
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from .shortcuts import create_ipython_shortcuts, suspend_to_bg, cursor_in_leading_ws
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from prompt_toolkit.enums import DEFAULT_BUFFER
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from prompt_toolkit.filters import (Condition, has_focus, has_selection,
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vi_insert_mode, emacs_insert_mode)
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from prompt_toolkit.key_binding import KeyBindings
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from prompt_toolkit.key_binding.bindings.completion import display_completions_like_readline
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from pygments.token import Token
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from prompt_toolkit.shortcuts.prompt import PromptSession
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from prompt_toolkit.enums import EditingMode
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from prompt_toolkit.formatted_text import PygmentsTokens
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from prompt_toolkit import __version__ as ptk_version
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PTK3 = ptk_version.startswith('3.')
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class TerminalPdb(Pdb):
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"""Standalone IPython debugger."""
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def __init__(self, *args, **kwargs):
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Pdb.__init__(self, *args, **kwargs)
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self._ptcomp = None
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self.pt_init()
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def pt_init(self):
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def get_prompt_tokens():
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return [(Token.Prompt, self.prompt)]
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if self._ptcomp is None:
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compl = IPCompleter(shell=self.shell,
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namespace={},
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global_namespace={},
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parent=self.shell,
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)
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self._ptcomp = IPythonPTCompleter(compl)
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options = dict(
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message=(lambda: PygmentsTokens(get_prompt_tokens())),
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editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
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key_bindings=create_ipython_shortcuts(self.shell),
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history=self.shell.debugger_history,
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completer=self._ptcomp,
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enable_history_search=True,
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mouse_support=self.shell.mouse_support,
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complete_style=self.shell.pt_complete_style,
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style=self.shell.style,
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color_depth=self.shell.color_depth,
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)
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if not PTK3:
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options['inputhook'] = self.shell.inputhook
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self.pt_loop = asyncio.new_event_loop()
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self.pt_app = PromptSession(**options)
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def cmdloop(self, intro=None):
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"""Repeatedly issue a prompt, accept input, parse an initial prefix
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off the received input, and dispatch to action methods, passing them
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the remainder of the line as argument.
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override the same methods from cmd.Cmd to provide prompt toolkit replacement.
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"""
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if not self.use_rawinput:
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raise ValueError('Sorry ipdb does not support use_rawinput=False')
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# In order to make sure that asyncio code written in the
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# interactive shell doesn't interfere with the prompt, we run the
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# prompt in a different event loop.
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# If we don't do this, people could spawn coroutine with a
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# while/true inside which will freeze the prompt.
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try:
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old_loop = asyncio.get_event_loop()
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except RuntimeError:
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# This happens when the user used `asyncio.run()`.
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old_loop = None
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self.preloop()
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try:
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if intro is not None:
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self.intro = intro
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if self.intro:
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self.stdout.write(str(self.intro)+"\n")
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stop = None
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while not stop:
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if self.cmdqueue:
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line = self.cmdqueue.pop(0)
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else:
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self._ptcomp.ipy_completer.namespace = self.curframe_locals
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self._ptcomp.ipy_completer.global_namespace = self.curframe.f_globals
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asyncio.set_event_loop(self.pt_loop)
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try:
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line = self.pt_app.prompt()
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except EOFError:
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line = 'EOF'
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finally:
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# Restore the original event loop.
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asyncio.set_event_loop(old_loop)
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line = self.precmd(line)
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stop = self.onecmd(line)
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stop = self.postcmd(stop, line)
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self.postloop()
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except Exception:
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raise
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def set_trace(frame=None):
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"""
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Start debugging from `frame`.
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If frame is not specified, debugging starts from caller's frame.
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"""
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TerminalPdb().set_trace(frame or sys._getframe().f_back)
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if __name__ == '__main__':
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import pdb
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# IPython.core.debugger.Pdb.trace_dispatch shall not catch
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# bdb.BdbQuit. When started through __main__ and an exception
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# happened after hitting "c", this is needed in order to
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# be able to quit the debugging session (see #9950).
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old_trace_dispatch = pdb.Pdb.trace_dispatch
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pdb.Pdb = TerminalPdb
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pdb.Pdb.trace_dispatch = old_trace_dispatch
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pdb.main()
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