""" Module to define and register Terminal IPython shortcuts with :mod:`prompt_toolkit` """ # Copyright (c) IPython Development Team. # Distributed under the terms of the Modified BSD License. import warnings import signal import sys from typing import Callable from prompt_toolkit.application.current import get_app from prompt_toolkit.enums import DEFAULT_BUFFER, SEARCH_BUFFER from prompt_toolkit.filters import (has_focus, has_selection, Condition, vi_insert_mode, emacs_insert_mode, has_completions, vi_mode) from prompt_toolkit.key_binding.bindings.completion import display_completions_like_readline from prompt_toolkit.key_binding import KeyBindings from IPython.utils.decorators import undoc @undoc @Condition def cursor_in_leading_ws(): before = get_app().current_buffer.document.current_line_before_cursor return (not before) or before.isspace() def create_ipython_shortcuts(shell): """Set up the prompt_toolkit keyboard shortcuts for IPython""" kb = KeyBindings() insert_mode = vi_insert_mode | emacs_insert_mode if getattr(shell, 'handle_return', None): return_handler = shell.handle_return(shell) else: return_handler = newline_or_execute_outer(shell) kb.add('enter', filter=(has_focus(DEFAULT_BUFFER) & ~has_selection & insert_mode ))(return_handler) kb.add('c-\\')(force_exit) kb.add('c-p', filter=(vi_insert_mode & has_focus(DEFAULT_BUFFER)) )(previous_history_or_previous_completion) kb.add('c-n', filter=(vi_insert_mode & has_focus(DEFAULT_BUFFER)) )(next_history_or_next_completion) kb.add('c-g', filter=(has_focus(DEFAULT_BUFFER) & has_completions) )(dismiss_completion) kb.add('c-c', filter=has_focus(DEFAULT_BUFFER))(reset_buffer) kb.add('c-c', filter=has_focus(SEARCH_BUFFER))(reset_search_buffer) supports_suspend = Condition(lambda: hasattr(signal, 'SIGTSTP')) kb.add('c-z', filter=supports_suspend)(suspend_to_bg) # Ctrl+I == Tab kb.add('tab', filter=(has_focus(DEFAULT_BUFFER) & ~has_selection & insert_mode & cursor_in_leading_ws ))(indent_buffer) kb.add('c-o', filter=(has_focus(DEFAULT_BUFFER) & emacs_insert_mode))(newline_autoindent_outer(shell.input_splitter)) kb.add('f2', filter=has_focus(DEFAULT_BUFFER))(open_input_in_editor) if shell.display_completions == 'readlinelike': kb.add('c-i', filter=(has_focus(DEFAULT_BUFFER) & ~has_selection & insert_mode & ~cursor_in_leading_ws ))(display_completions_like_readline) if sys.platform == 'win32': kb.add('c-v', filter=(has_focus(DEFAULT_BUFFER) & ~vi_mode))(win_paste) return kb def newline_or_execute_outer(shell): def newline_or_execute(event): """When the user presses return, insert a newline or execute the code.""" b = event.current_buffer d = b.document if b.complete_state: cc = b.complete_state.current_completion if cc: b.apply_completion(cc) else: b.cancel_completion() return # If there's only one line, treat it as if the cursor is at the end. # See https://github.com/ipython/ipython/issues/10425 if d.line_count == 1: check_text = d.text else: check_text = d.text[:d.cursor_position] status, indent = shell.input_splitter.check_complete(check_text + '\n') if not (d.on_last_line or d.cursor_position_row >= d.line_count - d.empty_line_count_at_the_end() ): b.insert_text('\n' + (' ' * (indent or 0))) return if (status != 'incomplete') and b.accept_handler: b.validate_and_handle() else: b.insert_text('\n' + (' ' * (indent or 0))) return newline_or_execute def previous_history_or_previous_completion(event): """ Control-P in vi edit mode on readline is history next, unlike default prompt toolkit. If completer is open this still select previous completion. """ event.current_buffer.auto_up() def next_history_or_next_completion(event): """ Control-N in vi edit mode on readline is history previous, unlike default prompt toolkit. If completer is open this still select next completion. """ event.current_buffer.auto_down() def dismiss_completion(event): b = event.current_buffer if b.complete_state: b.cancel_completion() def reset_buffer(event): b = event.current_buffer if b.complete_state: b.cancel_completion() else: b.reset() def reset_search_buffer(event): if event.current_buffer.document.text: event.current_buffer.reset() else: event.app.layout.focus(DEFAULT_BUFFER) def suspend_to_bg(event): event.app.suspend_to_background() def force_exit(event): """ Force exit (with a non-zero return value) """ sys.exit("Quit") def indent_buffer(event): event.current_buffer.insert_text(' ' * 4) @undoc def newline_with_copy_margin(event): """ DEPRECATED since IPython 6.0 See :any:`newline_autoindent_outer` for a replacement. Preserve margin and cursor position when using Control-O to insert a newline in EMACS mode """ warnings.warn("`newline_with_copy_margin(event)` is deprecated since IPython 6.0. " "see `newline_autoindent_outer(shell)(event)` for a replacement.", DeprecationWarning, stacklevel=2) b = event.current_buffer cursor_start_pos = b.document.cursor_position_col b.newline(copy_margin=True) b.cursor_up(count=1) cursor_end_pos = b.document.cursor_position_col if cursor_start_pos != cursor_end_pos: pos_diff = cursor_start_pos - cursor_end_pos b.cursor_right(count=pos_diff) def newline_autoindent_outer(inputsplitter) -> Callable[..., None]: """ Return a function suitable for inserting a indented newline after the cursor. Fancier version of deprecated ``newline_with_copy_margin`` which should compute the correct indentation of the inserted line. That is to say, indent by 4 extra space after a function definition, class definition, context manager... And dedent by 4 space after ``pass``, ``return``, ``raise ...``. """ def newline_autoindent(event): """insert a newline after the cursor indented appropriately.""" b = event.current_buffer d = b.document if b.complete_state: b.cancel_completion() text = d.text[:d.cursor_position] + '\n' _, indent = inputsplitter.check_complete(text) b.insert_text('\n' + (' ' * (indent or 0)), move_cursor=False) return newline_autoindent def open_input_in_editor(event): event.app.current_buffer.tempfile_suffix = ".py" event.app.current_buffer.open_in_editor() if sys.platform == 'win32': from IPython.core.error import TryNext from IPython.lib.clipboard import (ClipboardEmpty, win32_clipboard_get, tkinter_clipboard_get) @undoc def win_paste(event): try: text = win32_clipboard_get() except TryNext: try: text = tkinter_clipboard_get() except (TryNext, ClipboardEmpty): return except ClipboardEmpty: return event.current_buffer.insert_text(text.replace('\t', ' ' * 4))