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repl.py
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2090 lines (1809 loc) · 75.5 KB
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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import contextlib
import errno
import greenlet
import logging
import os
import re
import signal
import subprocess
import sys
import tempfile
import time
import unicodedata
from six.moves import range
from pygments import format as pygformat
from bpython._py3compat import PythonLexer
from pygments.formatters import TerminalFormatter
from wcwidth import wcswidth
import blessings
import curtsies
from curtsies import FSArray, fmtstr, FmtStr, Termmode
from curtsies import fmtfuncs
from curtsies import events
import bpython
from bpython.repl import Repl as BpythonRepl, SourceNotFound
from bpython.repl import LineTypeTranslator as LineType
from bpython.config import (
Struct,
loadini,
default_config_path,
getpreferredencoding,
)
from bpython.formatter import BPythonFormatter
from bpython import autocomplete
from bpython.translations import _
from bpython._py3compat import py3, is_main_thread
from bpython.pager import get_pager_command
from bpython.curtsiesfrontend import replpainter as paint
from bpython.curtsiesfrontend import sitefix
from bpython.curtsiesfrontend.coderunner import CodeRunner, FakeOutput
from bpython.curtsiesfrontend.filewatch import ModuleChangedEventHandler
from bpython.curtsiesfrontend.interaction import StatusBar
from bpython.curtsiesfrontend.manual_readline import edit_keys
from bpython.curtsiesfrontend import events as bpythonevents
from bpython.curtsiesfrontend.parse import parse as bpythonparse
from bpython.curtsiesfrontend.parse import func_for_letter, color_for_letter
from bpython.curtsiesfrontend.preprocess import preprocess
from bpython.curtsiesfrontend.interpreter import (
Interp,
code_finished_will_parse,
)
from curtsies.configfile_keynames import keymap as key_dispatch
if not py3:
import imp
import pkgutil
logger = logging.getLogger(__name__)
INCONSISTENT_HISTORY_MSG = "#<---History inconsistent with output shown--->"
CONTIGUITY_BROKEN_MSG = "#<---History contiguity broken by rewind--->"
HELP_MESSAGE = """
Thanks for using bpython!
See http://bpython-interpreter.org/ for more information and
http://docs.bpython-interpreter.org/ for docs.
Please report issues at https://github.com/bpython/bpython/issues
Features:
Try using undo ({config.undo_key})!
Edit the current line ({config.edit_current_block_key}) or the entire session ({config.external_editor_key}) in an external editor. (currently {config.editor})
Save sessions ({config.save_key}) or post them to pastebins ({config.pastebin_key})! Current pastebin helper: {config.pastebin_helper}
Reload all modules and rerun session ({config.reimport_key}) to test out changes to a module.
Toggle auto-reload mode ({config.toggle_file_watch_key}) to re-execute the current session when a module you've imported is modified.
bpython -i your_script.py runs a file in interactive mode
bpython -t your_script.py pastes the contents of a file into the session
A config file at {config_file_location} customizes keys and behavior of bpython.
You can also set which pastebin helper and which external editor to use.
See {example_config_url} for an example config file.
Press {config.edit_config_key} to edit this config file.
"""
EXAMPLE_CONFIG_URL = "https://raw.githubusercontent.com/bpython/bpython/master/bpython/sample-config"
EDIT_SESSION_HEADER = """### current bpython session - make changes and save to reevaluate session.
### lines beginning with ### will be ignored.
### To return to bpython without reevaluating make no changes to this file
### or save an empty file.
"""
# more than this many events will be assumed to be a true paste event,
# i.e. control characters like '<Ctrl-a>' will be stripped
MAX_EVENTS_POSSIBLY_NOT_PASTE = 20
# This is needed for is_nop and should be removed once is_nop is fixed.
if py3:
unicode = str
class FakeStdin(object):
"""The stdin object user code will reference
In user code, sys.stdin.read() asks the user for interactive input,
so this class returns control to the UI to get that input."""
def __init__(self, coderunner, repl, configured_edit_keys=None):
self.coderunner = coderunner
self.repl = repl
self.has_focus = False # whether FakeStdin receives keypress events
self.current_line = ""
self.cursor_offset = 0
self.old_num_lines = 0
self.readline_results = []
if configured_edit_keys:
self.rl_char_sequences = configured_edit_keys
else:
self.rl_char_sequences = edit_keys
def process_event(self, e):
assert self.has_focus
logger.debug("fake input processing event %r", e)
if isinstance(e, events.PasteEvent):
for ee in e.events:
if ee not in self.rl_char_sequences:
self.add_input_character(ee)
elif e in self.rl_char_sequences:
self.cursor_offset, self.current_line = self.rl_char_sequences[e](
self.cursor_offset, self.current_line
)
elif isinstance(e, events.SigIntEvent):
self.coderunner.sigint_happened_in_main_context = True
self.has_focus = False
self.current_line = ""
self.cursor_offset = 0
self.repl.run_code_and_maybe_finish()
elif e in ("<Esc+.>",):
self.get_last_word()
elif e in ["<ESC>"]:
pass
elif e in ["<Ctrl-d>"]:
if self.current_line == "":
self.repl.send_to_stdin("\n")
self.has_focus = False
self.current_line = ""
self.cursor_offset = 0
self.repl.run_code_and_maybe_finish(for_code="")
else:
pass
elif e in ["\n", "\r", "<Ctrl-j>", "<Ctrl-m>"]:
line = self.current_line
self.repl.send_to_stdin(line + "\n")
self.has_focus = False
self.current_line = ""
self.cursor_offset = 0
self.repl.run_code_and_maybe_finish(for_code=line + "\n")
else: # add normal character
self.add_input_character(e)
if self.current_line.endswith(("\n", "\r")):
pass
else:
self.repl.send_to_stdin(self.current_line)
def add_input_character(self, e):
if e == "<SPACE>":
e = " "
if e.startswith("<") and e.endswith(">"):
return
assert len(e) == 1, "added multiple characters: %r" % e
logger.debug("adding normal char %r to current line", e)
c = e if py3 else e.encode("utf8")
self.current_line = (
self.current_line[: self.cursor_offset]
+ c
+ self.current_line[self.cursor_offset :]
)
self.cursor_offset += 1
def readline(self):
self.has_focus = True
self.repl.send_to_stdin(self.current_line)
value = self.coderunner.request_from_main_context()
self.readline_results.append(value)
return value
def readlines(self, size=-1):
return list(iter(self.readline, ""))
def __iter__(self):
return iter(self.readlines())
def isatty(self):
return True
def flush(self):
"""Flush the internal buffer. This is a no-op. Flushing stdin
doesn't make any sense anyway."""
def write(self, value):
# XXX IPython expects sys.stdin.write to exist, there will no doubt be
# others, so here's a hack to keep them happy
raise IOError(errno.EBADF, "sys.stdin is read-only")
def close(self):
# hack to make closing stdin a nop
# This is useful for multiprocessing.Process, which does work
# for the most part, although output from other processes is
# discarded.
pass
@property
def encoding(self):
return "UTF8"
# TODO write a read() method?
class ReevaluateFakeStdin(object):
"""Stdin mock used during reevaluation (undo) so raw_inputs don't have to
be reentered"""
def __init__(self, fakestdin, repl):
self.fakestdin = fakestdin
self.repl = repl
self.readline_results = fakestdin.readline_results[:]
def readline(self):
if self.readline_results:
value = self.readline_results.pop(0)
else:
value = "no saved input available"
self.repl.send_to_stdouterr(value)
return value
class ImportLoader(object):
def __init__(self, watcher, loader):
self.watcher = watcher
self.loader = loader
def load_module(self, name):
module = self.loader.load_module(name)
if hasattr(module, "__file__"):
self.watcher.track_module(module.__file__)
return module
if not py3:
# Remember that pkgutil.ImpLoader is an old style class.
class ImpImportLoader(pkgutil.ImpLoader):
def __init__(self, watcher, *args):
self.watcher = watcher
pkgutil.ImpLoader.__init__(self, *args)
def load_module(self, name):
module = pkgutil.ImpLoader.load_module(self, name)
if hasattr(module, "__file__"):
self.watcher.track_module(module.__file__)
return module
class ImportFinder(object):
def __init__(self, watcher, old_meta_path):
self.watcher = watcher
self.old_meta_path = old_meta_path
def find_distributions(self, context):
for finder in self.old_meta_path:
distribution_finder = getattr(finder, "find_distributions", None)
if distribution_finder is not None:
loader = finder.find_distributions(context)
if loader is not None:
return loader
return None
def find_module(self, fullname, path=None):
for finder in self.old_meta_path:
loader = finder.find_module(fullname, path)
if loader is not None:
return ImportLoader(self.watcher, loader)
if not py3:
# Python 2 does not have the default finders stored in
# sys.meta_path. Use imp to perform the actual importing.
try:
result = imp.find_module(fullname, path)
return ImpImportLoader(self.watcher, fullname, *result)
except ImportError:
return None
return None
class BaseRepl(BpythonRepl):
"""Python Repl
Reacts to events like
- terminal dimensions and change events
- keystrokes
Behavior altered by
- number of scroll downs that were necessary to render array after each
display
- initial cursor position
outputs:
- 2D array to be rendered
BaseRepl is mostly view-independent state of Repl - but self.width and
self.height are important for figuring out how to wrap lines for example.
Usually self.width and self.height should be set by receiving a window
resize event, not manually set to anything - as long as the first event
received is a window resize event, this works fine.
Subclasses are responsible for implementing several methods.
"""
def __init__(
self,
locals_=None,
config=None,
banner=None,
interp=None,
orig_tcattrs=None,
):
"""
locals_ is a mapping of locals to pass into the interpreter
config is a bpython config.Struct with config attributes
banner is a string to display briefly in the status bar
interp is an interpreter instance to use
original terminal state, useful for shelling out with normal terminal
"""
logger.debug("starting init")
if config is None:
config = Struct()
loadini(config, default_config_path())
# If creating a new interpreter on undo would be unsafe because initial
# state was passed in
self.weak_rewind = bool(locals_ or interp)
if interp is None:
interp = Interp(locals=locals_)
interp.write = self.send_to_stdouterr
if banner is None:
if config.help_key:
banner = (
_("Welcome to bpython!")
+ " "
+ _("Press <%s> for help.") % config.help_key
)
else:
banner = None
# only one implemented currently
config.autocomplete_mode = autocomplete.SIMPLE
if config.cli_suggestion_width <= 0 or config.cli_suggestion_width > 1:
config.cli_suggestion_width = 1
self.reevaluating = False
self.fake_refresh_requested = False
self.status_bar = StatusBar(
config,
"",
request_refresh=self.request_refresh,
schedule_refresh=self.schedule_refresh,
)
self.edit_keys = edit_keys.mapping_with_config(config, key_dispatch)
logger.debug("starting parent init")
super(BaseRepl, self).__init__(interp, config)
self.formatter = BPythonFormatter(config.color_scheme)
# overwriting what bpython.Repl put there
# interact is called to interact with the status bar,
# so we're just using the same object
self.interact = self.status_bar
# line currently being edited, without ps1 (usually '>>> ')
self._current_line = ""
# current line of output - stdout and stdin go here
self.current_stdouterr_line = ""
# this is every line that's been displayed (input and output)
# as with formatting applied. Logical lines that exceeded the terminal width
# at the time of output are split across multiple entries in this list.
self.display_lines = []
# this is every line that's been executed; it gets smaller on rewind
self.history = []
# This is every logical line that's been displayed, both input and output.
# Like self.history, lines are unwrapped, uncolored, and without prompt.
# Entries are tuples, where
# - the first element the line (string, not fmtsr)
# - the second element is one of 2 global constants: "input" or "output"
# (use LineType.INPUT or LineType.OUTPUT to avoid typing these strings)
self.all_logical_lines = []
# formatted version of lines in the buffer kept around so we can
# unhighlight parens using self.reprint_line as called by bpython.Repl
self.display_buffer = []
# how many times display has been scrolled down
# because there wasn't room to display everything
self.scroll_offset = 0
# cursor position relative to start of current_line, 0 is first char
self._cursor_offset = 0
self.orig_tcattrs = orig_tcattrs
self.coderunner = CodeRunner(self.interp, self.request_refresh)
# filenos match the backing device for libs that expect it,
# but writing to them will do weird things to the display
self.stdout = FakeOutput(
self.coderunner,
self.send_to_stdouterr,
fileno=sys.__stdout__.fileno(),
)
self.stderr = FakeOutput(
self.coderunner,
self.send_to_stdouterr,
fileno=sys.__stderr__.fileno(),
)
self.stdin = FakeStdin(self.coderunner, self, self.edit_keys)
# next paint should clear screen
self.request_paint_to_clear_screen = False
self.request_paint_to_pad_bottom = 0
# offscreen command yields results different from scrollback buffer
self.inconsistent_history = False
# history error message has already been displayed
self.history_already_messed_up = False
# some commands act differently based on the prev event
# this list doesn't include instances of event.Event,
# only keypress-type events (no refresh screen events etc.)
self.last_events = [None] * 50
# displays prev events in a column on the right hand side
self.presentation_mode = False
self.paste_mode = False
self.current_match = None
self.list_win_visible = False
# whether auto reloading active
self.watching_files = config.default_autoreload
# 'reverse_incremental_search', 'incremental_search' or None
self.incr_search_mode = None
self.incr_search_target = ""
self.original_modules = set(sys.modules.keys())
self.width = None
self.height = None
self.status_bar.message(banner)
self.watcher = ModuleChangedEventHandler([], self.request_reload)
if self.watcher and config.default_autoreload:
self.watcher.activate()
# The methods below should be overridden, but the default implementations
# below can be used as well.
def get_cursor_vertical_diff(self):
"""Return how the cursor moved due to a window size change"""
return 0
def get_top_usable_line(self):
"""Return the top line of display that can be rewritten"""
return 0
def get_term_hw(self):
"""Returns the current width and height of the display area."""
return (50, 10)
def _schedule_refresh(self, when="now"):
"""Arrange for the bpython display to be refreshed soon.
This method will be called when the Repl wants the display to be
refreshed at a known point in the future, and as such it should
interrupt a pending request to the user for input.
Because the worst-case effect of not refreshing
is only having an out of date UI until the user enters input, a
default NOP implementation is provided."""
# The methods below must be overridden in subclasses.
def _request_refresh(self):
"""Arrange for the bpython display to be refreshed soon.
This method will be called when the Repl wants to refresh the display,
but wants control returned to it afterwards. (it is assumed that simply
returning from process_event will cause an event refresh)
The very next event received by process_event should be a
RefreshRequestEvent."""
raise NotImplementedError
def _request_reload(self, files_modified=("?",)):
"""Like request_refresh, but for reload requests events."""
raise NotImplementedError
def request_undo(self, n=1):
"""Like request_refresh, but for undo request events."""
raise NotImplementedError
def on_suspend(self):
"""Will be called on sigtstp.
Do whatever cleanup would allow the user to use other programs."""
raise NotImplementedError
def after_suspend(self):
"""Will be called when process foregrounded after suspend.
See to it that process_event is called with None to trigger a refresh
if not in the middle of a process_event call when suspend happened."""
raise NotImplementedError
# end methods that should be overridden in subclass
def request_refresh(self):
"""Request that the bpython display to be refreshed soon."""
if self.reevaluating or self.paste_mode:
self.fake_refresh_requested = True
else:
self._request_refresh()
def request_reload(self, files_modified=()):
"""Request that a ReloadEvent be passed next into process_event"""
if self.watching_files:
self._request_reload(files_modified=files_modified)
def schedule_refresh(self, when="now"):
"""Schedule a ScheduledRefreshRequestEvent for when.
Such a event should interrupt if blockied waiting for keyboard input"""
if self.reevaluating or self.paste_mode:
self.fake_refresh_requested = True
else:
self._schedule_refresh(when=when)
def __enter__(self):
self.orig_stdout = sys.stdout
self.orig_stderr = sys.stderr
self.orig_stdin = sys.stdin
sys.stdout = self.stdout
sys.stderr = self.stderr
sys.stdin = self.stdin
self.orig_sigwinch_handler = signal.getsignal(signal.SIGWINCH)
self.orig_sigtstp_handler = signal.getsignal(signal.SIGTSTP)
if is_main_thread():
# This turns off resize detection and ctrl-z suspension.
signal.signal(signal.SIGWINCH, self.sigwinch_handler)
signal.signal(signal.SIGTSTP, self.sigtstp_handler)
self.orig_meta_path = sys.meta_path
if self.watcher:
sys.meta_path = [ImportFinder(self.watcher, self.orig_meta_path)]
sitefix.monkeypatch_quit()
return self
def __exit__(self, *args):
sys.stdin = self.orig_stdin
sys.stdout = self.orig_stdout
sys.stderr = self.orig_stderr
if is_main_thread():
# This turns off resize detection and ctrl-z suspension.
signal.signal(signal.SIGWINCH, self.orig_sigwinch_handler)
signal.signal(signal.SIGTSTP, self.orig_sigtstp_handler)
sys.meta_path = self.orig_meta_path
def sigwinch_handler(self, signum, frame):
old_rows, old_columns = self.height, self.width
self.height, self.width = self.get_term_hw()
cursor_dy = self.get_cursor_vertical_diff()
self.scroll_offset -= cursor_dy
logger.info(
"sigwinch! Changed from %r to %r",
(old_rows, old_columns),
(self.height, self.width),
)
logger.info(
"decreasing scroll offset by %d to %d",
cursor_dy,
self.scroll_offset,
)
def sigtstp_handler(self, signum, frame):
self.scroll_offset = len(self.lines_for_display)
self.__exit__()
self.on_suspend()
os.kill(os.getpid(), signal.SIGTSTP)
self.after_suspend()
self.__enter__()
def clean_up_current_line_for_exit(self):
"""Called when trying to exit to prep for final paint"""
logger.debug("unhighlighting paren for exit")
self.cursor_offset = -1
self.unhighlight_paren()
# Event handling
def process_event(self, e):
"""Returns True if shutting down, otherwise returns None.
Mostly mutates state of Repl object"""
logger.debug("processing event %r", e)
if isinstance(e, events.Event):
return self.process_control_event(e)
else:
self.last_events.append(e)
self.last_events.pop(0)
return self.process_key_event(e)
def process_control_event(self, e):
if isinstance(e, bpythonevents.ScheduledRefreshRequestEvent):
# This is a scheduled refresh - it's really just a refresh (so nop)
pass
elif isinstance(e, bpythonevents.RefreshRequestEvent):
logger.info("received ASAP refresh request event")
if self.status_bar.has_focus:
self.status_bar.process_event(e)
else:
assert self.coderunner.code_is_waiting
self.run_code_and_maybe_finish()
elif self.status_bar.has_focus:
return self.status_bar.process_event(e)
# handles paste events for both stdin and repl
elif isinstance(e, events.PasteEvent):
ctrl_char = compress_paste_event(e)
if ctrl_char is not None:
return self.process_event(ctrl_char)
with self.in_paste_mode():
# Might not really be a paste, UI might just be lagging
if len(e.events) <= MAX_EVENTS_POSSIBLY_NOT_PASTE and any(
not is_simple_event(ee) for ee in e.events
):
for ee in e.events:
if self.stdin.has_focus:
self.stdin.process_event(ee)
else:
self.process_event(ee)
else:
simple_events = just_simple_events(e.events)
source = preprocess(
"".join(simple_events), self.interp.compile
)
for ee in source:
if self.stdin.has_focus:
self.stdin.process_event(ee)
else:
self.process_simple_keypress(ee)
elif isinstance(e, bpythonevents.RunStartupFileEvent):
try:
self.startup()
except IOError as e:
self.status_bar.message(
_("Executing PYTHONSTARTUP failed: %s") % (e,)
)
elif isinstance(e, bpythonevents.UndoEvent):
self.undo(n=e.n)
elif self.stdin.has_focus:
return self.stdin.process_event(e)
elif isinstance(e, events.SigIntEvent):
logger.debug("received sigint event")
self.keyboard_interrupt()
return
elif isinstance(e, bpythonevents.ReloadEvent):
if self.watching_files:
self.clear_modules_and_reevaluate()
self.status_bar.message(
_("Reloaded at %s because %s modified.")
% (time.strftime("%X"), " & ".join(e.files_modified))
)
else:
raise ValueError("Don't know how to handle event type: %r" % e)
def process_key_event(self, e):
# To find the curtsies name for a keypress, try
# python -m curtsies.events
if self.status_bar.has_focus:
return self.status_bar.process_event(e)
if self.stdin.has_focus:
return self.stdin.process_event(e)
if (
e
in (
key_dispatch[self.config.right_key]
+ key_dispatch[self.config.end_of_line_key]
+ ("<RIGHT>",)
)
and self.config.curtsies_right_arrow_completion
and self.cursor_offset == len(self.current_line)
):
self.current_line += self.current_suggestion
self.cursor_offset = len(self.current_line)
elif e in ("<UP>",) + key_dispatch[self.config.up_one_line_key]:
self.up_one_line()
elif e in ("<DOWN>",) + key_dispatch[self.config.down_one_line_key]:
self.down_one_line()
elif e in ("<Ctrl-d>",):
self.on_control_d()
elif e in ("<Ctrl-o>",):
self.operate_and_get_next()
elif e in ("<Esc+.>",):
self.get_last_word()
elif e in key_dispatch[self.config.reverse_incremental_search_key]:
self.incremental_search(reverse=True)
elif e in key_dispatch[self.config.incremental_search_key]:
self.incremental_search()
elif (
e in (("<BACKSPACE>",) + key_dispatch[self.config.backspace_key])
and self.incr_search_mode
):
self.add_to_incremental_search(self, backspace=True)
elif e in self.edit_keys.cut_buffer_edits:
self.readline_kill(e)
elif e in self.edit_keys.simple_edits:
self.cursor_offset, self.current_line = self.edit_keys.call(
e,
cursor_offset=self.cursor_offset,
line=self.current_line,
cut_buffer=self.cut_buffer,
)
elif e in key_dispatch[self.config.cut_to_buffer_key]:
self.cut_to_buffer()
elif e in key_dispatch[self.config.reimport_key]:
self.clear_modules_and_reevaluate()
elif e in key_dispatch[self.config.toggle_file_watch_key]:
return self.toggle_file_watch()
elif e in key_dispatch[self.config.clear_screen_key]:
self.request_paint_to_clear_screen = True
elif e in key_dispatch[self.config.show_source_key]:
self.show_source()
elif e in key_dispatch[self.config.help_key]:
self.pager(self.help_text())
elif e in key_dispatch[self.config.exit_key]:
raise SystemExit()
elif e in ("\n", "\r", "<PADENTER>", "<Ctrl-j>", "<Ctrl-m>"):
self.on_enter()
elif e == "<TAB>": # tab
self.on_tab()
elif e in ("<Shift-TAB>",):
self.on_tab(back=True)
elif e in key_dispatch[self.config.undo_key]: # ctrl-r for undo
self.prompt_undo()
elif e in key_dispatch[self.config.redo_key]: # ctrl-g for redo
self.redo()
elif e in key_dispatch[self.config.save_key]: # ctrl-s for save
greenlet.greenlet(self.write2file).switch()
elif e in key_dispatch[self.config.pastebin_key]: # F8 for pastebin
greenlet.greenlet(self.pastebin).switch()
elif e in key_dispatch[self.config.copy_clipboard_key]:
greenlet.greenlet(self.copy2clipboard).switch()
elif e in key_dispatch[self.config.external_editor_key]:
self.send_session_to_external_editor()
elif e in key_dispatch[self.config.edit_config_key]:
greenlet.greenlet(self.edit_config).switch()
# TODO add PAD keys hack as in bpython.cli
elif e in key_dispatch[self.config.edit_current_block_key]:
self.send_current_block_to_external_editor()
elif e in ["<ESC>"]:
self.incr_search_mode = None
elif e in ["<SPACE>"]:
self.add_normal_character(" ")
else:
self.add_normal_character(e)
def get_last_word(self):
previous_word = _last_word(self.rl_history.entry)
word = _last_word(self.rl_history.back())
line = self.current_line
self._set_current_line(
line[: len(line) - len(previous_word)] + word,
reset_rl_history=False,
)
self._set_cursor_offset(
self.cursor_offset - len(previous_word) + len(word),
reset_rl_history=False,
)
def incremental_search(self, reverse=False, include_current=False):
if self.incr_search_mode is None:
self.rl_history.enter(self.current_line)
self.incr_search_target = ""
else:
if self.incr_search_target:
line = (
self.rl_history.back(
False,
search=True,
target=self.incr_search_target,
include_current=include_current,
)
if reverse
else self.rl_history.forward(
False,
search=True,
target=self.incr_search_target,
include_current=include_current,
)
)
self._set_current_line(
line, reset_rl_history=False, clear_special_mode=False
)
self._set_cursor_offset(
len(self.current_line),
reset_rl_history=False,
clear_special_mode=False,
)
if reverse:
self.incr_search_mode = "reverse_incremental_search"
else:
self.incr_search_mode = "incremental_search"
def readline_kill(self, e):
func = self.edit_keys[e]
self.cursor_offset, self.current_line, cut = func(
self.cursor_offset, self.current_line
)
if self.last_events[-2] == e: # consecutive kill commands accumulative
if func.kills == "ahead":
self.cut_buffer += cut
elif func.kills == "behind":
self.cut_buffer = cut + self.cut_buffer
else:
raise ValueError("cut value other than 'ahead' or 'behind'")
else:
self.cut_buffer = cut
def on_enter(self, new_code=True, reset_rl_history=True):
# so the cursor isn't touching a paren TODO: necessary?
if new_code:
self.redo_stack = []
self._set_cursor_offset(-1, update_completion=False)
if reset_rl_history:
self.rl_history.reset()
self.history.append(self.current_line)
self.all_logical_lines.append((self.current_line, LineType.INPUT))
self.push(self.current_line, insert_into_history=new_code)
def on_tab(self, back=False):
"""Do something on tab key
taken from bpython.cli
Does one of the following:
1) add space to move up to the next %4==0 column
2) complete the current word with characters common to all completions
3) select the first or last match
4) select the next or previous match if already have a match
"""
def only_whitespace_left_of_cursor():
"""returns true if all characters before cursor are whitespace"""
return not self.current_line[: self.cursor_offset].strip()
logger.debug("self.matches_iter.matches:%r", self.matches_iter.matches)
if only_whitespace_left_of_cursor():
front_ws = len(self.current_line[: self.cursor_offset]) - len(
self.current_line[: self.cursor_offset].lstrip()
)
to_add = 4 - (front_ws % self.config.tab_length)
for unused in range(to_add):
self.add_normal_character(" ")
return
# run complete() if we don't already have matches
if len(self.matches_iter.matches) == 0:
self.list_win_visible = self.complete(tab=True)
# 3. check to see if we can expand the current word
if self.matches_iter.is_cseq():
cursor_and_line = self.matches_iter.substitute_cseq()
self._cursor_offset, self._current_line = cursor_and_line
# using _current_line so we don't trigger a completion reset
if not self.matches_iter.matches:
self.list_win_visible = self.complete()
elif self.matches_iter.matches:
self.current_match = (
back and self.matches_iter.previous() or next(self.matches_iter)
)
cursor_and_line = self.matches_iter.cur_line()
self._cursor_offset, self._current_line = cursor_and_line
# using _current_line so we don't trigger a completion reset
self.list_win_visible = True
def on_control_d(self):
if self.current_line == "":
raise SystemExit()
else:
self.current_line = (
self.current_line[: self.cursor_offset]
+ self.current_line[(self.cursor_offset + 1) :]
)
def cut_to_buffer(self):
self.cut_buffer = self.current_line[self.cursor_offset :]
self.current_line = self.current_line[: self.cursor_offset]
def yank_from_buffer(self):
pass
def operate_and_get_next(self):
# If we have not navigated back in history
# ctrl+o will have the same effect as enter
self.on_enter(reset_rl_history=False)
def up_one_line(self):
self.rl_history.enter(self.current_line)
self._set_current_line(
tabs_to_spaces(
self.rl_history.back(
False, search=self.config.curtsies_right_arrow_completion
)
),
update_completion=False,
reset_rl_history=False,
)
self._set_cursor_offset(len(self.current_line), reset_rl_history=False)
def down_one_line(self):
self.rl_history.enter(self.current_line)
self._set_current_line(
tabs_to_spaces(
self.rl_history.forward(
False, search=self.config.curtsies_right_arrow_completion
)
),
update_completion=False,
reset_rl_history=False,
)
self._set_cursor_offset(len(self.current_line), reset_rl_history=False)
def process_simple_keypress(self, e):
# '\n' needed for pastes
if e in ("<Ctrl-j>", "<Ctrl-m>", "<PADENTER>", "\n", "\r"):
self.on_enter()
while self.fake_refresh_requested:
self.fake_refresh_requested = False
self.process_event(bpythonevents.RefreshRequestEvent())
elif isinstance(e, events.Event):
pass # ignore events
elif e == "<SPACE>":
self.add_normal_character(" ")
else:
self.add_normal_character(e)
def send_current_block_to_external_editor(self, filename=None):
""""
Sends the current code block to external editor to be edited. Usually bound to C-x.
"""
text = self.send_to_external_editor(self.get_current_block())
lines = [line for line in text.split("\n")]
while lines and not lines[-1].split():