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"""IPython terminal interface using prompt_toolkit"""
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import asyncio
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import os
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import sys
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import warnings
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from warnings import warn
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from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC
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from IPython.utils import io
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from IPython.utils.py3compat import input
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from IPython.utils.terminal import toggle_set_term_title, set_term_title, restore_term_title
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from IPython.utils.process import abbrev_cwd
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from traitlets import (
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Bool, Unicode, Dict, Integer, observe, Instance, Type, default, Enum, Union,
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Any, validate
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)
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from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
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from prompt_toolkit.filters import (HasFocus, Condition, IsDone)
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from prompt_toolkit.formatted_text import PygmentsTokens
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from prompt_toolkit.history import InMemoryHistory
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from prompt_toolkit.layout.processors import ConditionalProcessor, HighlightMatchingBracketProcessor
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from prompt_toolkit.output import ColorDepth
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from prompt_toolkit.patch_stdout import patch_stdout
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from prompt_toolkit.shortcuts import PromptSession, CompleteStyle, print_formatted_text
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from prompt_toolkit.styles import DynamicStyle, merge_styles
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from prompt_toolkit.styles.pygments import style_from_pygments_cls, style_from_pygments_dict
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from prompt_toolkit import __version__ as ptk_version
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from pygments.styles import get_style_by_name
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from pygments.style import Style
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from pygments.token import Token
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from .debugger import TerminalPdb, Pdb
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from .magics import TerminalMagics
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from .pt_inputhooks import get_inputhook_name_and_func
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from .prompts import Prompts, ClassicPrompts, RichPromptDisplayHook
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from .ptutils import IPythonPTCompleter, IPythonPTLexer
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from .shortcuts import create_ipython_shortcuts
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DISPLAY_BANNER_DEPRECATED = object()
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PTK3 = ptk_version.startswith('3.')
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class _NoStyle(Style): pass
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_style_overrides_light_bg = {
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Token.Prompt: '#0000ff',
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Token.PromptNum: '#0000ee bold',
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Token.OutPrompt: '#cc0000',
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Token.OutPromptNum: '#bb0000 bold',
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}
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_style_overrides_linux = {
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Token.Prompt: '#00cc00',
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Token.PromptNum: '#00bb00 bold',
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Token.OutPrompt: '#cc0000',
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Token.OutPromptNum: '#bb0000 bold',
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}
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def get_default_editor():
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try:
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return os.environ['EDITOR']
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except KeyError:
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pass
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except UnicodeError:
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warn("$EDITOR environment variable is not pure ASCII. Using platform "
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"default editor.")
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if os.name == 'posix':
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return 'vi' # the only one guaranteed to be there!
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else:
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return 'notepad' # same in Windows!
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# conservatively check for tty
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# overridden streams can result in things like:
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# - sys.stdin = None
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# - no isatty method
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for _name in ('stdin', 'stdout', 'stderr'):
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_stream = getattr(sys, _name)
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if not _stream or not hasattr(_stream, 'isatty') or not _stream.isatty():
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_is_tty = False
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break
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else:
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_is_tty = True
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_use_simple_prompt = ('IPY_TEST_SIMPLE_PROMPT' in os.environ) or (not _is_tty)
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def black_reformat_handler(text_before_cursor):
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import black
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formatted_text = black.format_str(text_before_cursor, mode=black.FileMode())
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if not text_before_cursor.endswith('\n') and formatted_text.endswith('\n'):
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formatted_text = formatted_text[:-1]
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return formatted_text
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class TerminalInteractiveShell(InteractiveShell):
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mime_renderers = Dict().tag(config=True)
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space_for_menu = Integer(6, help='Number of line at the bottom of the screen '
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'to reserve for the tab completion menu, '
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'search history, ...etc, the height of '
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'these menus will at most this value. '
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'Increase it is you prefer long and skinny '
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'menus, decrease for short and wide.'
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).tag(config=True)
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pt_app = None
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debugger_history = None
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simple_prompt = Bool(_use_simple_prompt,
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help="""Use `raw_input` for the REPL, without completion and prompt colors.
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Useful when controlling IPython as a subprocess, and piping STDIN/OUT/ERR. Known usage are:
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IPython own testing machinery, and emacs inferior-shell integration through elpy.
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This mode default to `True` if the `IPY_TEST_SIMPLE_PROMPT`
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environment variable is set, or the current terminal is not a tty."""
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).tag(config=True)
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@property
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def debugger_cls(self):
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return Pdb if self.simple_prompt else TerminalPdb
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confirm_exit = Bool(True,
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help="""
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Set to confirm when you try to exit IPython with an EOF (Control-D
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in Unix, Control-Z/Enter in Windows). By typing 'exit' or 'quit',
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you can force a direct exit without any confirmation.""",
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).tag(config=True)
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editing_mode = Unicode('emacs',
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help="Shortcut style to use at the prompt. 'vi' or 'emacs'.",
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).tag(config=True)
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autoformatter = Unicode(None,
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help="Autoformatter to reformat Terminal code. Can be `'black'` or `None`",
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allow_none=True
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).tag(config=True)
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mouse_support = Bool(False,
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help="Enable mouse support in the prompt\n(Note: prevents selecting text with the mouse)"
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).tag(config=True)
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# We don't load the list of styles for the help string, because loading
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# Pygments plugins takes time and can cause unexpected errors.
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highlighting_style = Union([Unicode('legacy'), Type(klass=Style)],
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help="""The name or class of a Pygments style to use for syntax
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highlighting. To see available styles, run `pygmentize -L styles`."""
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).tag(config=True)
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@validate('editing_mode')
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def _validate_editing_mode(self, proposal):
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if proposal['value'].lower() == 'vim':
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proposal['value']= 'vi'
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elif proposal['value'].lower() == 'default':
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proposal['value']= 'emacs'
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if hasattr(EditingMode, proposal['value'].upper()):
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return proposal['value'].lower()
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return self.editing_mode
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@observe('editing_mode')
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def _editing_mode(self, change):
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u_mode = change.new.upper()
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if self.pt_app:
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self.pt_app.editing_mode = u_mode
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@observe('autoformatter')
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def _autoformatter_changed(self, change):
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formatter = change.new
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if formatter is None:
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self.reformat_handler = lambda x:x
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elif formatter == 'black':
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self.reformat_handler = black_reformat_handler
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else:
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raise ValueError
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@observe('highlighting_style')
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@observe('colors')
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def _highlighting_style_changed(self, change):
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self.refresh_style()
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def refresh_style(self):
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self._style = self._make_style_from_name_or_cls(self.highlighting_style)
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highlighting_style_overrides = Dict(
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help="Override highlighting format for specific tokens"
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).tag(config=True)
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true_color = Bool(False,
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help=("Use 24bit colors instead of 256 colors in prompt highlighting. "
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"If your terminal supports true color, the following command "
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"should print 'TRUECOLOR' in orange: "
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"printf \"\\x1b[38;2;255;100;0mTRUECOLOR\\x1b[0m\\n\"")
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).tag(config=True)
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editor = Unicode(get_default_editor(),
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help="Set the editor used by IPython (default to $EDITOR/vi/notepad)."
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).tag(config=True)
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prompts_class = Type(Prompts, help='Class used to generate Prompt token for prompt_toolkit').tag(config=True)
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prompts = Instance(Prompts)
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@default('prompts')
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def _prompts_default(self):
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return self.prompts_class(self)
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# @observe('prompts')
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# def _(self, change):
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# self._update_layout()
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@default('displayhook_class')
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def _displayhook_class_default(self):
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return RichPromptDisplayHook
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term_title = Bool(True,
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help="Automatically set the terminal title"
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).tag(config=True)
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term_title_format = Unicode("IPython: {cwd}",
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help="Customize the terminal title format. This is a python format string. " +
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"Available substitutions are: {cwd}."
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).tag(config=True)
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display_completions = Enum(('column', 'multicolumn','readlinelike'),
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help= ( "Options for displaying tab completions, 'column', 'multicolumn', and "
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"'readlinelike'. These options are for `prompt_toolkit`, see "
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"`prompt_toolkit` documentation for more information."
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),
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default_value='multicolumn').tag(config=True)
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highlight_matching_brackets = Bool(True,
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help="Highlight matching brackets.",
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).tag(config=True)
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extra_open_editor_shortcuts = Bool(False,
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help="Enable vi (v) or Emacs (C-X C-E) shortcuts to open an external editor. "
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"This is in addition to the F2 binding, which is always enabled."
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).tag(config=True)
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handle_return = Any(None,
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help="Provide an alternative handler to be called when the user presses "
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"Return. This is an advanced option intended for debugging, which "
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"may be changed or removed in later releases."
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).tag(config=True)
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enable_history_search = Bool(True,
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help="Allows to enable/disable the prompt toolkit history search"
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).tag(config=True)
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prompt_includes_vi_mode = Bool(True,
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help="Display the current vi mode (when using vi editing mode)."
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).tag(config=True)
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@observe('term_title')
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def init_term_title(self, change=None):
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# Enable or disable the terminal title.
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if self.term_title:
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toggle_set_term_title(True)
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set_term_title(self.term_title_format.format(cwd=abbrev_cwd()))
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else:
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toggle_set_term_title(False)
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def restore_term_title(self):
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if self.term_title:
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restore_term_title()
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def init_display_formatter(self):
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super(TerminalInteractiveShell, self).init_display_formatter()
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# terminal only supports plain text
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self.display_formatter.active_types = ['text/plain']
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# disable `_ipython_display_`
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self.display_formatter.ipython_display_formatter.enabled = False
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def init_prompt_toolkit_cli(self):
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if self.simple_prompt:
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# Fall back to plain non-interactive output for tests.
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# This is very limited.
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def prompt():
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prompt_text = "".join(x[1] for x in self.prompts.in_prompt_tokens())
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lines = [input(prompt_text)]
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prompt_continuation = "".join(x[1] for x in self.prompts.continuation_prompt_tokens())
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while self.check_complete('\n'.join(lines))[0] == 'incomplete':
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lines.append( input(prompt_continuation) )
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return '\n'.join(lines)
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self.prompt_for_code = prompt
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return
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# Set up keyboard shortcuts
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key_bindings = create_ipython_shortcuts(self)
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# Pre-populate history from IPython's history database
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history = InMemoryHistory()
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last_cell = u""
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for __, ___, cell in self.history_manager.get_tail(self.history_load_length,
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include_latest=True):
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# Ignore blank lines and consecutive duplicates
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cell = cell.rstrip()
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if cell and (cell != last_cell):
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history.append_string(cell)
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last_cell = cell
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self._style = self._make_style_from_name_or_cls(self.highlighting_style)
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self.style = DynamicStyle(lambda: self._style)
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editing_mode = getattr(EditingMode, self.editing_mode.upper())
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self.pt_loop = asyncio.new_event_loop()
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self.pt_app = PromptSession(
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editing_mode=editing_mode,
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key_bindings=key_bindings,
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history=history,
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completer=IPythonPTCompleter(shell=self),
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enable_history_search = self.enable_history_search,
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style=self.style,
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include_default_pygments_style=False,
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mouse_support=self.mouse_support,
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enable_open_in_editor=self.extra_open_editor_shortcuts,
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color_depth=self.color_depth,
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tempfile_suffix=".py",
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**self._extra_prompt_options())
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def _make_style_from_name_or_cls(self, name_or_cls):
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"""
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Small wrapper that make an IPython compatible style from a style name
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We need that to add style for prompt ... etc.
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"""
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style_overrides = {}
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if name_or_cls == 'legacy':
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legacy = self.colors.lower()
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if legacy == 'linux':
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style_cls = get_style_by_name('monokai')
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style_overrides = _style_overrides_linux
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elif legacy == 'lightbg':
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style_overrides = _style_overrides_light_bg
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style_cls = get_style_by_name('pastie')
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elif legacy == 'neutral':
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# The default theme needs to be visible on both a dark background
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# and a light background, because we can't tell what the terminal
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# looks like. These tweaks to the default theme help with that.
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style_cls = get_style_by_name('default')
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style_overrides.update({
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Token.Number: '#007700',
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Token.Operator: 'noinherit',
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Token.String: '#BB6622',
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Token.Name.Function: '#2080D0',
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Token.Name.Class: 'bold #2080D0',
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Token.Name.Namespace: 'bold #2080D0',
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Token.Prompt: '#009900',
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Token.PromptNum: '#ansibrightgreen bold',
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Token.OutPrompt: '#990000',
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Token.OutPromptNum: '#ansibrightred bold',
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})
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# Hack: Due to limited color support on the Windows console
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# the prompt colors will be wrong without this
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if os.name == 'nt':
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style_overrides.update({
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Token.Prompt: '#ansidarkgreen',
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Token.PromptNum: '#ansigreen bold',
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Token.OutPrompt: '#ansidarkred',
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Token.OutPromptNum: '#ansired bold',
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})
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elif legacy =='nocolor':
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style_cls=_NoStyle
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style_overrides = {}
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else :
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raise ValueError('Got unknown colors: ', legacy)
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else :
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if isinstance(name_or_cls, str):
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style_cls = get_style_by_name(name_or_cls)
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else:
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style_cls = name_or_cls
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style_overrides = {
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Token.Prompt: '#009900',
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Token.PromptNum: '#ansibrightgreen bold',
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Token.OutPrompt: '#990000',
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Token.OutPromptNum: '#ansibrightred bold',
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}
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style_overrides.update(self.highlighting_style_overrides)
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style = merge_styles([
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style_from_pygments_cls(style_cls),
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style_from_pygments_dict(style_overrides),
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])
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return style
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@property
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def pt_complete_style(self):
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return {
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'multicolumn': CompleteStyle.MULTI_COLUMN,
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'column': CompleteStyle.COLUMN,
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'readlinelike': CompleteStyle.READLINE_LIKE,
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}[self.display_completions]
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@property
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def color_depth(self):
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return (ColorDepth.TRUE_COLOR if self.true_color else None)
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def _extra_prompt_options(self):
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"""
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Return the current layout option for the current Terminal InteractiveShell
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"""
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def get_message():
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return PygmentsTokens(self.prompts.in_prompt_tokens())
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if self.editing_mode == 'emacs':
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# with emacs mode the prompt is (usually) static, so we call only
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# the function once. With VI mode it can toggle between [ins] and
|
|
|
# [nor] so we can't precompute.
|
|
|
# here I'm going to favor the default keybinding which almost
|
|
|
# everybody uses to decrease CPU usage.
|
|
|
# if we have issues with users with custom Prompts we can see how to
|
|
|
# work around this.
|
|
|
get_message = get_message()
|
|
|
|
|
|
options = {
|
|
|
'complete_in_thread': False,
|
|
|
'lexer':IPythonPTLexer(),
|
|
|
'reserve_space_for_menu':self.space_for_menu,
|
|
|
'message': get_message,
|
|
|
'prompt_continuation': (
|
|
|
lambda width, lineno, is_soft_wrap:
|
|
|
PygmentsTokens(self.prompts.continuation_prompt_tokens(width))),
|
|
|
'multiline': True,
|
|
|
'complete_style': self.pt_complete_style,
|
|
|
|
|
|
# Highlight matching brackets, but only when this setting is
|
|
|
# enabled, and only when the DEFAULT_BUFFER has the focus.
|
|
|
'input_processors': [ConditionalProcessor(
|
|
|
processor=HighlightMatchingBracketProcessor(chars='[](){}'),
|
|
|
filter=HasFocus(DEFAULT_BUFFER) & ~IsDone() &
|
|
|
Condition(lambda: self.highlight_matching_brackets))],
|
|
|
}
|
|
|
if not PTK3:
|
|
|
options['inputhook'] = self.inputhook
|
|
|
|
|
|
return options
|
|
|
|
|
|
def prompt_for_code(self):
|
|
|
if self.rl_next_input:
|
|
|
default = self.rl_next_input
|
|
|
self.rl_next_input = None
|
|
|
else:
|
|
|
default = ''
|
|
|
|
|
|
# In order to make sure that asyncio code written in the
|
|
|
# interactive shell doesn't interfere with the prompt, we run the
|
|
|
# prompt in a different event loop.
|
|
|
# If we don't do this, people could spawn coroutine with a
|
|
|
# while/true inside which will freeze the prompt.
|
|
|
|
|
|
try:
|
|
|
old_loop = asyncio.get_event_loop()
|
|
|
except RuntimeError:
|
|
|
# This happens when the user used `asyncio.run()`.
|
|
|
old_loop = None
|
|
|
|
|
|
asyncio.set_event_loop(self.pt_loop)
|
|
|
try:
|
|
|
with patch_stdout(raw=True):
|
|
|
text = self.pt_app.prompt(
|
|
|
default=default,
|
|
|
**self._extra_prompt_options())
|
|
|
finally:
|
|
|
# Restore the original event loop.
|
|
|
asyncio.set_event_loop(old_loop)
|
|
|
|
|
|
return text
|
|
|
|
|
|
def enable_win_unicode_console(self):
|
|
|
# Since IPython 7.10 doesn't support python < 3.6 and PEP 528, Python uses the unicode APIs for the Windows
|
|
|
# console by default, so WUC shouldn't be needed.
|
|
|
from warnings import warn
|
|
|
warn("`enable_win_unicode_console` is deprecated since IPython 7.10, does not do anything and will be removed in the future",
|
|
|
DeprecationWarning,
|
|
|
stacklevel=2)
|
|
|
|
|
|
def init_io(self):
|
|
|
if sys.platform not in {'win32', 'cli'}:
|
|
|
return
|
|
|
|
|
|
import colorama
|
|
|
colorama.init()
|
|
|
|
|
|
# For some reason we make these wrappers around stdout/stderr.
|
|
|
# For now, we need to reset them so all output gets coloured.
|
|
|
# https://github.com/ipython/ipython/issues/8669
|
|
|
# io.std* are deprecated, but don't show our own deprecation warnings
|
|
|
# during initialization of the deprecated API.
|
|
|
with warnings.catch_warnings():
|
|
|
warnings.simplefilter('ignore', DeprecationWarning)
|
|
|
io.stdout = io.IOStream(sys.stdout)
|
|
|
io.stderr = io.IOStream(sys.stderr)
|
|
|
|
|
|
def init_magics(self):
|
|
|
super(TerminalInteractiveShell, self).init_magics()
|
|
|
self.register_magics(TerminalMagics)
|
|
|
|
|
|
def init_alias(self):
|
|
|
# The parent class defines aliases that can be safely used with any
|
|
|
# frontend.
|
|
|
super(TerminalInteractiveShell, self).init_alias()
|
|
|
|
|
|
# Now define aliases that only make sense on the terminal, because they
|
|
|
# need direct access to the console in a way that we can't emulate in
|
|
|
# GUI or web frontend
|
|
|
if os.name == 'posix':
|
|
|
for cmd in ('clear', 'more', 'less', 'man'):
|
|
|
self.alias_manager.soft_define_alias(cmd, cmd)
|
|
|
|
|
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
|
super(TerminalInteractiveShell, self).__init__(*args, **kwargs)
|
|
|
self.init_prompt_toolkit_cli()
|
|
|
self.init_term_title()
|
|
|
self.keep_running = True
|
|
|
|
|
|
self.debugger_history = InMemoryHistory()
|
|
|
|
|
|
def ask_exit(self):
|
|
|
self.keep_running = False
|
|
|
|
|
|
rl_next_input = None
|
|
|
|
|
|
def interact(self, display_banner=DISPLAY_BANNER_DEPRECATED):
|
|
|
|
|
|
if display_banner is not DISPLAY_BANNER_DEPRECATED:
|
|
|
warn('interact `display_banner` argument is deprecated since IPython 5.0. Call `show_banner()` if needed.', DeprecationWarning, stacklevel=2)
|
|
|
|
|
|
self.keep_running = True
|
|
|
while self.keep_running:
|
|
|
print(self.separate_in, end='')
|
|
|
|
|
|
try:
|
|
|
code = self.prompt_for_code()
|
|
|
except EOFError:
|
|
|
if (not self.confirm_exit) \
|
|
|
or self.ask_yes_no('Do you really want to exit ([y]/n)?','y','n'):
|
|
|
self.ask_exit()
|
|
|
|
|
|
else:
|
|
|
if code:
|
|
|
self.run_cell(code, store_history=True)
|
|
|
|
|
|
def mainloop(self, display_banner=DISPLAY_BANNER_DEPRECATED):
|
|
|
# An extra layer of protection in case someone mashing Ctrl-C breaks
|
|
|
# out of our internal code.
|
|
|
if display_banner is not DISPLAY_BANNER_DEPRECATED:
|
|
|
warn('mainloop `display_banner` argument is deprecated since IPython 5.0. Call `show_banner()` if needed.', DeprecationWarning, stacklevel=2)
|
|
|
while True:
|
|
|
try:
|
|
|
self.interact()
|
|
|
break
|
|
|
except KeyboardInterrupt as e:
|
|
|
print("\n%s escaped interact()\n" % type(e).__name__)
|
|
|
finally:
|
|
|
# An interrupt during the eventloop will mess up the
|
|
|
# internal state of the prompt_toolkit library.
|
|
|
# Stopping the eventloop fixes this, see
|
|
|
# https://github.com/ipython/ipython/pull/9867
|
|
|
if hasattr(self, '_eventloop'):
|
|
|
self._eventloop.stop()
|
|
|
|
|
|
self.restore_term_title()
|
|
|
|
|
|
|
|
|
_inputhook = None
|
|
|
def inputhook(self, context):
|
|
|
if self._inputhook is not None:
|
|
|
self._inputhook(context)
|
|
|
|
|
|
active_eventloop = None
|
|
|
def enable_gui(self, gui=None):
|
|
|
if gui and (gui != 'inline') :
|
|
|
self.active_eventloop, self._inputhook =\
|
|
|
get_inputhook_name_and_func(gui)
|
|
|
else:
|
|
|
self.active_eventloop = self._inputhook = None
|
|
|
|
|
|
# For prompt_toolkit 3.0. We have to create an asyncio event loop with
|
|
|
# this inputhook.
|
|
|
if PTK3:
|
|
|
import asyncio
|
|
|
from prompt_toolkit.eventloop import new_eventloop_with_inputhook
|
|
|
|
|
|
if gui == 'asyncio':
|
|
|
# When we integrate the asyncio event loop, run the UI in the
|
|
|
# same event loop as the rest of the code. don't use an actual
|
|
|
# input hook. (Asyncio is not made for nesting event loops.)
|
|
|
self.pt_loop = asyncio.get_event_loop()
|
|
|
|
|
|
elif self._inputhook:
|
|
|
# If an inputhook was set, create a new asyncio event loop with
|
|
|
# this inputhook for the prompt.
|
|
|
self.pt_loop = new_eventloop_with_inputhook(self._inputhook)
|
|
|
else:
|
|
|
# When there's no inputhook, run the prompt in a separate
|
|
|
# asyncio event loop.
|
|
|
self.pt_loop = asyncio.new_event_loop()
|
|
|
|
|
|
# Run !system commands directly, not through pipes, so terminal programs
|
|
|
# work correctly.
|
|
|
system = InteractiveShell.system_raw
|
|
|
|
|
|
def auto_rewrite_input(self, cmd):
|
|
|
"""Overridden from the parent class to use fancy rewriting prompt"""
|
|
|
if not self.show_rewritten_input:
|
|
|
return
|
|
|
|
|
|
tokens = self.prompts.rewrite_prompt_tokens()
|
|
|
if self.pt_app:
|
|
|
print_formatted_text(PygmentsTokens(tokens), end='',
|
|
|
style=self.pt_app.app.style)
|
|
|
print(cmd)
|
|
|
else:
|
|
|
prompt = ''.join(s for t, s in tokens)
|
|
|
print(prompt, cmd, sep='')
|
|
|
|
|
|
_prompts_before = None
|
|
|
def switch_doctest_mode(self, mode):
|
|
|
"""Switch prompts to classic for %doctest_mode"""
|
|
|
if mode:
|
|
|
self._prompts_before = self.prompts
|
|
|
self.prompts = ClassicPrompts(self)
|
|
|
elif self._prompts_before:
|
|
|
self.prompts = self._prompts_before
|
|
|
self._prompts_before = None
|
|
|
# self._update_layout()
|
|
|
|
|
|
|
|
|
InteractiveShellABC.register(TerminalInteractiveShell)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
TerminalInteractiveShell.instance().interact()
|
|
|
|
