Add prompt toolkit 3 compatibility to ipdb

closes  #11962
closes  #11975

IPython/terminal/debugger.py

@@ -1,120 +1,126 b''
 import signal
 import sys
 
 from IPython.core.debugger import Pdb
 
 from IPython.core.completer import IPCompleter
 from .ptutils import IPythonPTCompleter
 from .shortcuts import suspend_to_bg, cursor_in_leading_ws
 
 from prompt_toolkit.enums import DEFAULT_BUFFER
 from prompt_toolkit.filters import (Condition, has_focus, has_selection,
     vi_insert_mode, emacs_insert_mode)
 from prompt_toolkit.key_binding import KeyBindings
 from prompt_toolkit.key_binding.bindings.completion import display_completions_like_readline
 from pygments.token import Token
 from prompt_toolkit.shortcuts.prompt import PromptSession
 from prompt_toolkit.enums import EditingMode
 from prompt_toolkit.formatted_text import PygmentsTokens
 
+from prompt_toolkit import __version__ as ptk_version
+PTK3 = ptk_version.startswith('3.')
+
 
 class TerminalPdb(Pdb):
     """Standalone IPython debugger."""
 
     def __init__(self, *args, **kwargs):
         Pdb.__init__(self, *args, **kwargs)
         self._ptcomp = None
         self.pt_init()
 
     def pt_init(self):
         def get_prompt_tokens():
             return [(Token.Prompt, self.prompt)]
 
         if self._ptcomp is None:
             compl = IPCompleter(shell=self.shell,
                                         namespace={},
                                         global_namespace={},
                                         parent=self.shell,
                                        )
             self._ptcomp = IPythonPTCompleter(compl)
 
         kb = KeyBindings()
         supports_suspend = Condition(lambda: hasattr(signal, 'SIGTSTP'))
         kb.add('c-z', filter=supports_suspend)(suspend_to_bg)
 
         if self.shell.display_completions == 'readlinelike':
             kb.add('tab', filter=(has_focus(DEFAULT_BUFFER)
                                   & ~has_selection
                                   & vi_insert_mode | emacs_insert_mode
                                   & ~cursor_in_leading_ws
                               ))(display_completions_like_readline)
 
-        self.pt_app = PromptSession(
-                            message=(lambda: PygmentsTokens(get_prompt_tokens())),
-                            editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
-                            key_bindings=kb,
-                            history=self.shell.debugger_history,
-                            completer=self._ptcomp,
-                            enable_history_search=True,
-                            mouse_support=self.shell.mouse_support,
-                            complete_style=self.shell.pt_complete_style,
-                            style=self.shell.style,
-                            inputhook=self.shell.inputhook,
-                            color_depth=self.shell.color_depth,
+        options = dict(
+            message=(lambda: PygmentsTokens(get_prompt_tokens())),
+            editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
+            key_bindings=kb,
+            history=self.shell.debugger_history,
+            completer=self._ptcomp,
+            enable_history_search=True,
+            mouse_support=self.shell.mouse_support,
+            complete_style=self.shell.pt_complete_style,
+            style=self.shell.style,
+            color_depth=self.shell.color_depth,
         )
 
+        if not PTK3:
+            options['inputhook'] = self.inputhook
+        self.pt_app = PromptSession(**options)
+
     def cmdloop(self, intro=None):
         """Repeatedly issue a prompt, accept input, parse an initial prefix
         off the received input, and dispatch to action methods, passing them
         the remainder of the line as argument.
 
         override the same methods from cmd.Cmd to provide prompt toolkit replacement.
         """
         if not self.use_rawinput:
             raise ValueError('Sorry ipdb does not support use_rawinput=False')
 
         self.preloop()
 
         try:
             if intro is not None:
                 self.intro = intro
             if self.intro:
                 self.stdout.write(str(self.intro)+"\n")
             stop = None
             while not stop:
                 if self.cmdqueue:
                     line = self.cmdqueue.pop(0)
                 else:
                     self._ptcomp.ipy_completer.namespace = self.curframe_locals
                     self._ptcomp.ipy_completer.global_namespace = self.curframe.f_globals
                     try:
                         line = self.pt_app.prompt() # reset_current_buffer=True)
                     except EOFError:
                         line = 'EOF'
                 line = self.precmd(line)
                 stop = self.onecmd(line)
                 stop = self.postcmd(stop, line)
             self.postloop()
         except Exception:
             raise
 
 
 def set_trace(frame=None):
     """
     Start debugging from `frame`.
 
     If frame is not specified, debugging starts from caller's frame.
     """
     TerminalPdb().set_trace(frame or sys._getframe().f_back)
 
 
 if __name__ == '__main__':
     import pdb
     # IPython.core.debugger.Pdb.trace_dispatch shall not catch
     # bdb.BdbQuit. When started through __main__ and an exception
     # happened after hitting "c", this is needed in order to
     # be able to quit the debugging session (see #9950).
     old_trace_dispatch = pdb.Pdb.trace_dispatch
     pdb.Pdb = TerminalPdb
     pdb.Pdb.trace_dispatch = old_trace_dispatch
     pdb.main()