Add clipboard configuration option. Resolve #43.

Author: ryneeverett

examples/ptpython_config/config.py

@@ -7,6 +7,7 @@
 from prompt_toolkit.filters import ViInsertMode
 from prompt_toolkit.key_binding.input_processor import KeyPress
 from prompt_toolkit.keys import Keys
+from prompt_toolkit.clipboard.pyperclip import PyperclipClipboard
 from pygments.token import Token
 
 from ptpython.layout import CompletionVisualisation
@@ -156,6 +157,9 @@ def _(event):
         b.insert_text(' ')
     """
 
+    # Use system clipboard.
+    repl.clipboard = PyperclipClipboard()
+
 
 # Custom colorscheme for the UI. See `ptpython/layout.py` and
 # `ptpython/style.py` for all possible tokens.

ptpython/python_input.py

@@ -515,6 +515,7 @@ def create_application(self):
             buffers=buffers,
             key_bindings_registry=self.key_bindings_registry,
             paste_mode=Condition(lambda cli: self.paste_mode),
+            clipboard=getattr(self, 'clipboard', None),
             mouse_support=Condition(lambda cli: self.enable_mouse_support),
             on_abort=AbortAction.RETRY,
             on_exit=self._on_exit,