intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 114 insertions, 0 deletions

diff --git a/contrib/python/ipython/py2/IPython/terminal/debugger.py b/contrib/python/ipython/py2/IPython/terminal/debugger.py
new file mode 100644
index 0000000000..c68a3204a6
--- /dev/null
+++ b/contrib/python/ipython/py2/IPython/terminal/debugger.py
@@ -0,0 +1,114 @@
+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, HasFocus, HasSelection,
+    ViInsertMode, EmacsInsertMode)
+from prompt_toolkit.keys import Keys
+from prompt_toolkit.key_binding.manager import KeyBindingManager
+from prompt_toolkit.key_binding.bindings.completion import display_completions_like_readline
+from prompt_toolkit.token import Token
+from prompt_toolkit.shortcuts import create_prompt_application
+from prompt_toolkit.interface import CommandLineInterface
+from prompt_toolkit.enums import EditingMode
+
+
+class TerminalPdb(Pdb):
+    def __init__(self, *args, **kwargs):
+        Pdb.__init__(self, *args, **kwargs)
+        self._ptcomp = None
+        self.pt_init()
+
+    def pt_init(self):
+        def get_prompt_tokens(cli):
+            return [(Token.Prompt, self.prompt)]
+
+        def patch_stdout(**kwargs):
+            return self.pt_cli.patch_stdout_context(**kwargs)
+
+        if self._ptcomp is None:
+            compl = IPCompleter(shell=self.shell,
+                                        namespace={},
+                                        global_namespace={},
+                                        use_readline=False,
+                                        parent=self.shell,
+                                       )
+            self._ptcomp = IPythonPTCompleter(compl, patch_stdout=patch_stdout)
+
+        kbmanager = KeyBindingManager.for_prompt()
+        supports_suspend = Condition(lambda cli: hasattr(signal, 'SIGTSTP'))
+        kbmanager.registry.add_binding(Keys.ControlZ, filter=supports_suspend
+                                      )(suspend_to_bg)
+
+        if self.shell.display_completions == 'readlinelike':
+            kbmanager.registry.add_binding(Keys.ControlI,
+                                 filter=(HasFocus(DEFAULT_BUFFER)
+                                         & ~HasSelection()
+                                         & ViInsertMode() | EmacsInsertMode()
+                                         & ~cursor_in_leading_ws
+                                         ))(display_completions_like_readline)
+        multicolumn = (self.shell.display_completions == 'multicolumn')
+
+        self._pt_app = create_prompt_application(
+                            editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
+                            key_bindings_registry=kbmanager.registry,
+                            history=self.shell.debugger_history,
+                            completer= self._ptcomp,
+                            enable_history_search=True,
+                            mouse_support=self.shell.mouse_support,
+                            get_prompt_tokens=get_prompt_tokens,
+                            display_completions_in_columns=multicolumn,
+                            style=self.shell.style
+        )
+        self.pt_cli = CommandLineInterface(self._pt_app, eventloop=self.shell._eventloop)
+
+    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_cli.run(reset_current_buffer=True).text
+                    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)
+