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ORPA-pyOpenRPA/WPy32-3720/python-3.7.2/Lib/site-packages/ptpython/python_input.py

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30 KiB

"""
Application for reading Python input.
This can be used for creation of Python REPLs.
"""
from __future__ import unicode_literals
from prompt_toolkit.application import Application, get_app
from prompt_toolkit.application.run_in_terminal import run_coroutine_in_terminal
from prompt_toolkit.auto_suggest import AutoSuggestFromHistory, ConditionalAutoSuggest, ThreadedAutoSuggest
from prompt_toolkit.buffer import Buffer
from prompt_toolkit.key_binding.bindings.auto_suggest import load_auto_suggest_bindings
from prompt_toolkit.key_binding.bindings.open_in_editor import load_open_in_editor_bindings
from prompt_toolkit.completion import ThreadedCompleter
from prompt_toolkit.document import Document
from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
from prompt_toolkit.eventloop.defaults import get_event_loop
from prompt_toolkit.filters import Condition
from prompt_toolkit.history import FileHistory, InMemoryHistory, ThreadedHistory
from prompt_toolkit.input.defaults import create_input
from prompt_toolkit.key_binding import merge_key_bindings, ConditionalKeyBindings, KeyBindings
from prompt_toolkit.key_binding.vi_state import InputMode
from prompt_toolkit.lexers import PygmentsLexer, DynamicLexer, SimpleLexer
from prompt_toolkit.output import ColorDepth
from prompt_toolkit.output.defaults import create_output
from prompt_toolkit.styles import DynamicStyle, SwapLightAndDarkStyleTransformation, ConditionalStyleTransformation, AdjustBrightnessStyleTransformation, merge_style_transformations
from prompt_toolkit.utils import is_windows
from prompt_toolkit.validation import ConditionalValidator
from .completer import PythonCompleter
from .history_browser import History
from .key_bindings import load_python_bindings, load_sidebar_bindings, load_confirm_exit_bindings
from .layout import PtPythonLayout, CompletionVisualisation
from .prompt_style import IPythonPrompt, ClassicPrompt
from .style import get_all_code_styles, get_all_ui_styles, generate_style
from .utils import get_jedi_script_from_document
from .validator import PythonValidator
from functools import partial
import sys
import six
import __future__
if six.PY2:
from pygments.lexers import PythonLexer
else:
from pygments.lexers import Python3Lexer as PythonLexer
__all__ = (
'PythonInput',
)
class OptionCategory(object):
def __init__(self, title, options):
assert isinstance(title, six.text_type)
assert isinstance(options, list)
self.title = title
self.options = options
class Option(object):
"""
Ptpython configuration option that can be shown and modified from the
sidebar.
:param title: Text.
:param description: Text.
:param get_values: Callable that returns a dictionary mapping the
possible values to callbacks that activate these value.
:param get_current_value: Callable that returns the current, active value.
"""
def __init__(self, title, description, get_current_value, get_values):
assert isinstance(title, six.text_type)
assert isinstance(description, six.text_type)
assert callable(get_current_value)
assert callable(get_values)
self.title = title
self.description = description
self.get_current_value = get_current_value
self.get_values = get_values
@property
def values(self):
return self.get_values()
def activate_next(self, _previous=False):
"""
Activate next value.
"""
current = self.get_current_value()
options = sorted(self.values.keys())
# Get current index.
try:
index = options.index(current)
except ValueError:
index = 0
# Go to previous/next index.
if _previous:
index -= 1
else:
index += 1
# Call handler for this option.
next_option = options[index % len(options)]
self.values[next_option]()
def activate_previous(self):
"""
Activate previous value.
"""
self.activate_next(_previous=True)
COLOR_DEPTHS = {
ColorDepth.DEPTH_1_BIT: 'Monochrome',
ColorDepth.DEPTH_4_BIT: 'ANSI Colors',
ColorDepth.DEPTH_8_BIT: '256 colors',
ColorDepth.DEPTH_24_BIT: 'True color',
}
class PythonInput(object):
"""
Prompt for reading Python input.
::
python_input = PythonInput(...)
python_code = python_input.app.run()
"""
def __init__(self,
get_globals=None, get_locals=None, history_filename=None,
vi_mode=False,
input=None,
output=None,
color_depth=None,
# For internal use.
extra_key_bindings=None,
_completer=None, _validator=None,
_lexer=None, _extra_buffer_processors=None,
_extra_layout_body=None, _extra_toolbars=None,
_input_buffer_height=None):
self.get_globals = get_globals or (lambda: {})
self.get_locals = get_locals or self.get_globals
self._completer = _completer or PythonCompleter(self.get_globals, self.get_locals)
self._validator = _validator or PythonValidator(self.get_compiler_flags)
self._lexer = _lexer or PygmentsLexer(PythonLexer)
if history_filename:
self.history = ThreadedHistory(FileHistory(history_filename))
else:
self.history = InMemoryHistory()
self._input_buffer_height = _input_buffer_height
self._extra_layout_body = _extra_layout_body or []
self._extra_toolbars = _extra_toolbars or []
self._extra_buffer_processors = _extra_buffer_processors or []
self.extra_key_bindings = extra_key_bindings or KeyBindings()
# Settings.
self.show_signature = False
self.show_docstring = False
self.show_meta_enter_message = True
self.completion_visualisation = CompletionVisualisation.MULTI_COLUMN
self.completion_menu_scroll_offset = 1
self.show_line_numbers = False
self.show_status_bar = True
self.wrap_lines = True
self.complete_while_typing = True
self.paste_mode = False # When True, don't insert whitespace after newline.
self.confirm_exit = True # Ask for confirmation when Control-D is pressed.
self.accept_input_on_enter = 2 # Accept when pressing Enter 'n' times.
# 'None' means that meta-enter is always required.
self.enable_open_in_editor = True
self.enable_system_bindings = True
self.enable_input_validation = True
self.enable_auto_suggest = False
self.enable_mouse_support = False
self.enable_history_search = False # When True, like readline, going
# back in history will filter the
# history on the records starting
# with the current input.
self.enable_syntax_highlighting = True
self.swap_light_and_dark = False
self.highlight_matching_parenthesis = False
self.show_sidebar = False # Currently show the sidebar.
self.show_sidebar_help = True # When the sidebar is visible, also show the help text.
self.show_exit_confirmation = False # Currently show 'Do you really want to exit?'
self.terminal_title = None # The title to be displayed in the terminal. (None or string.)
self.exit_message = 'Do you really want to exit?'
self.insert_blank_line_after_output = True # (For the REPL.)
# The buffers.
self.default_buffer = self._create_buffer()
self.search_buffer = Buffer()
self.docstring_buffer = Buffer(read_only=True)
# Tokens to be shown at the prompt.
self.prompt_style = 'classic' # The currently active style.
self.all_prompt_styles = { # Styles selectable from the menu.
'ipython': IPythonPrompt(self),
'classic': ClassicPrompt(),
}
self.get_input_prompt = lambda: \
self.all_prompt_styles[self.prompt_style].in_prompt()
self.get_output_prompt = lambda: \
self.all_prompt_styles[self.prompt_style].out_prompt()
#: Load styles.
self.code_styles = get_all_code_styles()
self.ui_styles = get_all_ui_styles()
self._current_code_style_name = 'default'
self._current_ui_style_name = 'default'
if is_windows():
self._current_code_style_name = 'win32'
self._current_style = self._generate_style()
self.color_depth = color_depth or ColorDepth.default()
self.max_brightness = 1.0
self.min_brightness = 0.0
# Options to be configurable from the sidebar.
self.options = self._create_options()
self.selected_option_index = 0
#: Incremeting integer counting the current statement.
self.current_statement_index = 1
# Code signatures. (This is set asynchronously after a timeout.)
self.signatures = []
# Boolean indicating whether we have a signatures thread running.
# (Never run more than one at the same time.)
self._get_signatures_thread_running = False
self.output = output or create_output()
self.input = input or create_input(sys.stdin)
self.style_transformation = merge_style_transformations([
ConditionalStyleTransformation(
SwapLightAndDarkStyleTransformation(),
filter=Condition(lambda: self.swap_light_and_dark)),
AdjustBrightnessStyleTransformation(
lambda: self.min_brightness,
lambda: self.max_brightness),
])
self.ptpython_layout = PtPythonLayout(
self,
lexer=DynamicLexer(
lambda: self._lexer if self.enable_syntax_highlighting else SimpleLexer()),
input_buffer_height=self._input_buffer_height,
extra_buffer_processors=self._extra_buffer_processors,
extra_body=self._extra_layout_body,
extra_toolbars=self._extra_toolbars)
self.app = self._create_application()
if vi_mode:
self.app.editing_mode = EditingMode.VI
def _accept_handler(self, buff):
app = get_app()
app.exit(result=buff.text)
app.pre_run_callables.append(buff.reset)
return True # Keep text, we call 'reset' later on.
@property
def option_count(self):
" Return the total amount of options. (In all categories together.) "
return sum(len(category.options) for category in self.options)
@property
def selected_option(self):
" Return the currently selected option. "
i = 0
for category in self.options:
for o in category.options:
if i == self.selected_option_index:
return o
else:
i += 1
def get_compiler_flags(self):
"""
Give the current compiler flags by looking for _Feature instances
in the globals.
"""
flags = 0
for value in self.get_globals().values():
if isinstance(value, __future__._Feature):
flags |= value.compiler_flag
return flags
@property
def add_key_binding(self):
"""
Shortcut for adding new key bindings.
(Mostly useful for a .ptpython/config.py file, that receives
a PythonInput/Repl instance as input.)
::
@python_input.add_key_binding(Keys.ControlX, filter=...)
def handler(event):
...
"""
def add_binding_decorator(*k, **kw):
return self.extra_key_bindings.add(*k, **kw)
return add_binding_decorator
def install_code_colorscheme(self, name, style_dict):
"""
Install a new code color scheme.
"""
assert isinstance(name, six.text_type)
assert isinstance(style_dict, dict)
self.code_styles[name] = style_dict
def use_code_colorscheme(self, name):
"""
Apply new colorscheme. (By name.)
"""
assert name in self.code_styles
self._current_code_style_name = name
self._current_style = self._generate_style()
def install_ui_colorscheme(self, name, style_dict):
"""
Install a new UI color scheme.
"""
assert isinstance(name, six.text_type)
assert isinstance(style_dict, dict)
self.ui_styles[name] = style_dict
def use_ui_colorscheme(self, name):
"""
Apply new colorscheme. (By name.)
"""
assert name in self.ui_styles
self._current_ui_style_name = name
self._current_style = self._generate_style()
def _use_color_depth(self, depth):
self.color_depth = depth
def _set_min_brightness(self, value):
self.min_brightness = value
self.max_brightness = max(self.max_brightness, value)
def _set_max_brightness(self, value):
self.max_brightness = value
self.min_brightness = min(self.min_brightness, value)
def _generate_style(self):
"""
Create new Style instance.
(We don't want to do this on every key press, because each time the
renderer receives a new style class, he will redraw everything.)
"""
return generate_style(self.code_styles[self._current_code_style_name],
self.ui_styles[self._current_ui_style_name])
def _create_options(self):
"""
Create a list of `Option` instances for the options sidebar.
"""
def enable(attribute, value=True):
setattr(self, attribute, value)
# Return `True`, to be able to chain this in the lambdas below.
return True
def disable(attribute):
setattr(self, attribute, False)
return True
def simple_option(title, description, field_name, values=None):
" Create Simple on/of option. "
values = values or ['off', 'on']
def get_current_value():
return values[bool(getattr(self, field_name))]
def get_values():
return {
values[1]: lambda: enable(field_name),
values[0]: lambda: disable(field_name),
}
return Option(title=title, description=description,
get_values=get_values,
get_current_value=get_current_value)
brightness_values = [1.0 / 20 * value for value in range(0, 21)]
return [
OptionCategory('Input', [
simple_option(title='Editing mode',
description='Vi or emacs key bindings.',
field_name='vi_mode',
values=[EditingMode.EMACS, EditingMode.VI]),
simple_option(title='Paste mode',
description="When enabled, don't indent automatically.",
field_name='paste_mode'),
Option(title='Complete while typing',
description="Generate autocompletions automatically while typing. "
'Don\'t require pressing TAB. (Not compatible with "History search".)',
get_current_value=lambda: ['off', 'on'][self.complete_while_typing],
get_values=lambda: {
'on': lambda: enable('complete_while_typing') and disable('enable_history_search'),
'off': lambda: disable('complete_while_typing'),
}),
Option(title='History search',
description='When pressing the up-arrow, filter the history on input starting '
'with the current text. (Not compatible with "Complete while typing".)',
get_current_value=lambda: ['off', 'on'][self.enable_history_search],
get_values=lambda: {
'on': lambda: enable('enable_history_search') and disable('complete_while_typing'),
'off': lambda: disable('enable_history_search'),
}),
simple_option(title='Mouse support',
description='Respond to mouse clicks and scrolling for positioning the cursor, '
'selecting text and scrolling through windows.',
field_name='enable_mouse_support'),
simple_option(title='Confirm on exit',
description='Require confirmation when exiting.',
field_name='confirm_exit'),
simple_option(title='Input validation',
description='In case of syntax errors, move the cursor to the error '
'instead of showing a traceback of a SyntaxError.',
field_name='enable_input_validation'),
simple_option(title='Auto suggestion',
description='Auto suggest inputs by looking at the history. '
'Pressing right arrow or Ctrl-E will complete the entry.',
field_name='enable_auto_suggest'),
Option(title='Accept input on enter',
description='Amount of ENTER presses required to execute input when the cursor '
'is at the end of the input. (Note that META+ENTER will always execute.)',
get_current_value=lambda: str(self.accept_input_on_enter or 'meta-enter'),
get_values=lambda: {
'2': lambda: enable('accept_input_on_enter', 2),
'3': lambda: enable('accept_input_on_enter', 3),
'4': lambda: enable('accept_input_on_enter', 4),
'meta-enter': lambda: enable('accept_input_on_enter', None),
}),
]),
OptionCategory('Display', [
Option(title='Completions',
description='Visualisation to use for displaying the completions. (Multiple columns, one column, a toolbar or nothing.)',
get_current_value=lambda: self.completion_visualisation,
get_values=lambda: {
CompletionVisualisation.NONE: lambda: enable('completion_visualisation', CompletionVisualisation.NONE),
CompletionVisualisation.POP_UP: lambda: enable('completion_visualisation', CompletionVisualisation.POP_UP),
CompletionVisualisation.MULTI_COLUMN: lambda: enable('completion_visualisation', CompletionVisualisation.MULTI_COLUMN),
CompletionVisualisation.TOOLBAR: lambda: enable('completion_visualisation', CompletionVisualisation.TOOLBAR),
}),
Option(title='Prompt',
description="Visualisation of the prompt. ('>>>' or 'In [1]:')",
get_current_value=lambda: self.prompt_style,
get_values=lambda: dict((s, partial(enable, 'prompt_style', s)) for s in self.all_prompt_styles)),
simple_option(title='Blank line after output',
description='Insert a blank line after the output.',
field_name='insert_blank_line_after_output'),
simple_option(title='Show signature',
description='Display function signatures.',
field_name='show_signature'),
simple_option(title='Show docstring',
description='Display function docstrings.',
field_name='show_docstring'),
simple_option(title='Show line numbers',
description='Show line numbers when the input consists of multiple lines.',
field_name='show_line_numbers'),
simple_option(title='Show Meta+Enter message',
description='Show the [Meta+Enter] message when this key combination is required to execute commands. ' +
'(This is the case when a simple [Enter] key press will insert a newline.',
field_name='show_meta_enter_message'),
simple_option(title='Wrap lines',
description='Wrap lines instead of scrolling horizontally.',
field_name='wrap_lines'),
simple_option(title='Show status bar',
description='Show the status bar at the bottom of the terminal.',
field_name='show_status_bar'),
simple_option(title='Show sidebar help',
description='When the sidebar is visible, also show this help text.',
field_name='show_sidebar_help'),
simple_option(title='Highlight parenthesis',
description='Highlight matching parenthesis, when the cursor is on or right after one.',
field_name='highlight_matching_parenthesis'),
]),
OptionCategory('Colors', [
simple_option(title='Syntax highlighting',
description='Use colors for syntax highligthing',
field_name='enable_syntax_highlighting'),
simple_option(title='Swap light/dark colors',
description='Swap light and dark colors.',
field_name='swap_light_and_dark'),
Option(title='Code',
description='Color scheme to use for the Python code.',
get_current_value=lambda: self._current_code_style_name,
get_values=lambda: dict(
(name, partial(self.use_code_colorscheme, name)) for name in self.code_styles)
),
Option(title='User interface',
description='Color scheme to use for the user interface.',
get_current_value=lambda: self._current_ui_style_name,
get_values=lambda: dict(
(name, partial(self.use_ui_colorscheme, name)) for name in self.ui_styles)
),
Option(title='Color depth',
description='Monochrome (1 bit), 16 ANSI colors (4 bit),\n256 colors (8 bit), or 24 bit.',
get_current_value=lambda: COLOR_DEPTHS[self.color_depth],
get_values=lambda: dict(
(name, partial(self._use_color_depth, depth)) for depth, name in COLOR_DEPTHS.items())
),
Option(title='Min brightness',
description='Minimum brightness for the color scheme (default=0.0).',
get_current_value=lambda: '%.2f' % self.min_brightness,
get_values=lambda: dict(
('%.2f' % value, partial(self._set_min_brightness, value))
for value in brightness_values)
),
Option(title='Max brightness',
description='Maximum brightness for the color scheme (default=1.0).',
get_current_value=lambda: '%.2f' % self.max_brightness,
get_values=lambda: dict(
('%.2f' % value, partial(self._set_max_brightness, value))
for value in brightness_values)
),
]),
]
def _create_application(self):
"""
Create an `Application` instance.
"""
return Application(
input=self.input,
output=self.output,
layout=self.ptpython_layout.layout,
key_bindings=merge_key_bindings([
load_python_bindings(self),
load_auto_suggest_bindings(),
load_sidebar_bindings(self),
load_confirm_exit_bindings(self),
ConditionalKeyBindings(
load_open_in_editor_bindings(),
Condition(lambda: self.enable_open_in_editor)),
# Extra key bindings should not be active when the sidebar is visible.
ConditionalKeyBindings(
self.extra_key_bindings,
Condition(lambda: not self.show_sidebar))
]),
color_depth=lambda: self.color_depth,
paste_mode=Condition(lambda: self.paste_mode),
mouse_support=Condition(lambda: self.enable_mouse_support),
style=DynamicStyle(lambda: self._current_style),
style_transformation=self.style_transformation,
include_default_pygments_style=False,
reverse_vi_search_direction=True)
def _create_buffer(self):
"""
Create the `Buffer` for the Python input.
"""
python_buffer = Buffer(
name=DEFAULT_BUFFER,
complete_while_typing=Condition(lambda: self.complete_while_typing),
enable_history_search=Condition(lambda: self.enable_history_search),
tempfile_suffix='.py',
history=self.history,
completer=ThreadedCompleter(self._completer),
validator=ConditionalValidator(
self._validator,
Condition(lambda: self.enable_input_validation)),
auto_suggest=ConditionalAutoSuggest(
ThreadedAutoSuggest(AutoSuggestFromHistory()),
Condition(lambda: self.enable_auto_suggest)),
accept_handler=self._accept_handler,
on_text_changed=self._on_input_timeout)
return python_buffer
@property
def editing_mode(self):
return self.app.editing_mode
@editing_mode.setter
def editing_mode(self, value):
self.app.editing_mode = value
@property
def vi_mode(self):
return self.editing_mode == EditingMode.VI
@vi_mode.setter
def vi_mode(self, value):
if value:
self.editing_mode = EditingMode.VI
else:
self.editing_mode = EditingMode.EMACS
def _on_input_timeout(self, buff):
"""
When there is no input activity,
in another thread, get the signature of the current code.
"""
assert isinstance(buff, Buffer)
app = self.app
# Never run multiple get-signature threads.
if self._get_signatures_thread_running:
return
self._get_signatures_thread_running = True
document = buff.document
def run():
script = get_jedi_script_from_document(document, self.get_locals(), self.get_globals())
# Show signatures in help text.
if script:
try:
signatures = script.call_signatures()
except ValueError:
# e.g. in case of an invalid \\x escape.
signatures = []
except Exception:
# Sometimes we still get an exception (TypeError), because
# of probably bugs in jedi. We can silence them.
# See: https://github.com/davidhalter/jedi/issues/492
signatures = []
else:
# Try to access the params attribute just once. For Jedi
# signatures containing the keyword-only argument star,
# this will crash when retrieving it the first time with
# AttributeError. Every following time it works.
# See: https://github.com/jonathanslenders/ptpython/issues/47
# https://github.com/davidhalter/jedi/issues/598
try:
if signatures:
signatures[0].params
except AttributeError:
pass
else:
signatures = []
self._get_signatures_thread_running = False
# Set signatures and redraw if the text didn't change in the
# meantime. Otherwise request new signatures.
if buff.text == document.text:
self.signatures = signatures
# Set docstring in docstring buffer.
if signatures:
string = signatures[0].docstring()
if not isinstance(string, six.text_type):
string = string.decode('utf-8')
self.docstring_buffer.reset(
document=Document(string, cursor_position=0))
else:
self.docstring_buffer.reset()
app.invalidate()
else:
self._on_input_timeout(buff)
get_event_loop().run_in_executor(run)
def on_reset(self):
self.signatures = []
def enter_history(self):
"""
Display the history.
"""
app = get_app()
app.vi_state.input_mode = InputMode.NAVIGATION
def done(f):
result = f.result()
if result is not None:
self.default_buffer.text = result
app.vi_state.input_mode = InputMode.INSERT
history = History(self, self.default_buffer.document)
future = run_coroutine_in_terminal(history.app.run_async)
future.add_done_callback(done)