You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
231 lines
7.9 KiB
Python
231 lines
7.9 KiB
Python
"""prompt-toolkit utilities
|
|
|
|
Everything in this module is a private API,
|
|
not to be used outside IPython.
|
|
"""
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
import unicodedata
|
|
from wcwidth import wcwidth
|
|
|
|
from IPython.core.completer import (
|
|
provisionalcompleter, cursor_to_position,
|
|
_deduplicate_completions)
|
|
from prompt_toolkit.completion import Completer, Completion
|
|
from prompt_toolkit.lexers import Lexer
|
|
from prompt_toolkit.lexers import PygmentsLexer
|
|
from prompt_toolkit.patch_stdout import patch_stdout
|
|
from IPython.core.getipython import get_ipython
|
|
|
|
|
|
import pygments.lexers as pygments_lexers
|
|
import os
|
|
import sys
|
|
import traceback
|
|
|
|
_completion_sentinel = object()
|
|
|
|
|
|
def _elide_point(string: str, *, min_elide) -> str:
|
|
"""
|
|
If a string is long enough, and has at least 3 dots,
|
|
replace the middle part with ellipses.
|
|
|
|
If a string naming a file is long enough, and has at least 3 slashes,
|
|
replace the middle part with ellipses.
|
|
|
|
If three consecutive dots, or two consecutive dots are encountered these are
|
|
replaced by the equivalents HORIZONTAL ELLIPSIS or TWO DOT LEADER unicode
|
|
equivalents
|
|
"""
|
|
string = string.replace('...','\N{HORIZONTAL ELLIPSIS}')
|
|
string = string.replace('..','\N{TWO DOT LEADER}')
|
|
if len(string) < min_elide:
|
|
return string
|
|
|
|
object_parts = string.split('.')
|
|
file_parts = string.split(os.sep)
|
|
if file_parts[-1] == '':
|
|
file_parts.pop()
|
|
|
|
if len(object_parts) > 3:
|
|
return "{}.{}\N{HORIZONTAL ELLIPSIS}{}.{}".format(
|
|
object_parts[0],
|
|
object_parts[1][:1],
|
|
object_parts[-2][-1:],
|
|
object_parts[-1],
|
|
)
|
|
|
|
elif len(file_parts) > 3:
|
|
return ("{}" + os.sep + "{}\N{HORIZONTAL ELLIPSIS}{}" + os.sep + "{}").format(
|
|
file_parts[0], file_parts[1][:1], file_parts[-2][-1:], file_parts[-1]
|
|
)
|
|
|
|
return string
|
|
|
|
|
|
def _elide_typed(string: str, typed: str, *, min_elide: int) -> str:
|
|
"""
|
|
Elide the middle of a long string if the beginning has already been typed.
|
|
"""
|
|
|
|
if len(string) < min_elide:
|
|
return string
|
|
cut_how_much = len(typed)-3
|
|
if cut_how_much < 7:
|
|
return string
|
|
if string.startswith(typed) and len(string)> len(typed):
|
|
return f"{string[:3]}\N{HORIZONTAL ELLIPSIS}{string[cut_how_much:]}"
|
|
return string
|
|
|
|
|
|
def _elide(string: str, typed: str, min_elide) -> str:
|
|
return _elide_typed(
|
|
_elide_point(string, min_elide=min_elide),
|
|
typed, min_elide=min_elide)
|
|
|
|
|
|
|
|
def _adjust_completion_text_based_on_context(text, body, offset):
|
|
if text.endswith('=') and len(body) > offset and body[offset] == '=':
|
|
return text[:-1]
|
|
else:
|
|
return text
|
|
|
|
|
|
class IPythonPTCompleter(Completer):
|
|
"""Adaptor to provide IPython completions to prompt_toolkit"""
|
|
def __init__(self, ipy_completer=None, shell=None):
|
|
if shell is None and ipy_completer is None:
|
|
raise TypeError("Please pass shell=an InteractiveShell instance.")
|
|
self._ipy_completer = ipy_completer
|
|
self.shell = shell
|
|
|
|
@property
|
|
def ipy_completer(self):
|
|
if self._ipy_completer:
|
|
return self._ipy_completer
|
|
else:
|
|
return self.shell.Completer
|
|
|
|
def get_completions(self, document, complete_event):
|
|
if not document.current_line.strip():
|
|
return
|
|
# Some bits of our completion system may print stuff (e.g. if a module
|
|
# is imported). This context manager ensures that doesn't interfere with
|
|
# the prompt.
|
|
|
|
with patch_stdout(), provisionalcompleter():
|
|
body = document.text
|
|
cursor_row = document.cursor_position_row
|
|
cursor_col = document.cursor_position_col
|
|
cursor_position = document.cursor_position
|
|
offset = cursor_to_position(body, cursor_row, cursor_col)
|
|
try:
|
|
yield from self._get_completions(body, offset, cursor_position, self.ipy_completer)
|
|
except Exception as e:
|
|
try:
|
|
exc_type, exc_value, exc_tb = sys.exc_info()
|
|
traceback.print_exception(exc_type, exc_value, exc_tb)
|
|
except AttributeError:
|
|
print('Unrecoverable Error in completions')
|
|
|
|
def _get_completions(self, body, offset, cursor_position, ipyc):
|
|
"""
|
|
Private equivalent of get_completions() use only for unit_testing.
|
|
"""
|
|
debug = getattr(ipyc, 'debug', False)
|
|
completions = _deduplicate_completions(
|
|
body, ipyc.completions(body, offset))
|
|
for c in completions:
|
|
if not c.text:
|
|
# Guard against completion machinery giving us an empty string.
|
|
continue
|
|
text = unicodedata.normalize('NFC', c.text)
|
|
# When the first character of the completion has a zero length,
|
|
# then it's probably a decomposed unicode character. E.g. caused by
|
|
# the "\dot" completion. Try to compose again with the previous
|
|
# character.
|
|
if wcwidth(text[0]) == 0:
|
|
if cursor_position + c.start > 0:
|
|
char_before = body[c.start - 1]
|
|
fixed_text = unicodedata.normalize(
|
|
'NFC', char_before + text)
|
|
|
|
# Yield the modified completion instead, if this worked.
|
|
if wcwidth(text[0:1]) == 1:
|
|
yield Completion(fixed_text, start_position=c.start - offset - 1)
|
|
continue
|
|
|
|
# TODO: Use Jedi to determine meta_text
|
|
# (Jedi currently has a bug that results in incorrect information.)
|
|
# meta_text = ''
|
|
# yield Completion(m, start_position=start_pos,
|
|
# display_meta=meta_text)
|
|
display_text = c.text
|
|
|
|
adjusted_text = _adjust_completion_text_based_on_context(
|
|
c.text, body, offset
|
|
)
|
|
min_elide = 30 if self.shell is None else self.shell.min_elide
|
|
if c.type == "function":
|
|
yield Completion(
|
|
adjusted_text,
|
|
start_position=c.start - offset,
|
|
display=_elide(
|
|
display_text + "()",
|
|
body[c.start : c.end],
|
|
min_elide=min_elide,
|
|
),
|
|
display_meta=c.type + c.signature,
|
|
)
|
|
else:
|
|
yield Completion(
|
|
adjusted_text,
|
|
start_position=c.start - offset,
|
|
display=_elide(
|
|
display_text,
|
|
body[c.start : c.end],
|
|
min_elide=min_elide,
|
|
),
|
|
display_meta=c.type,
|
|
)
|
|
|
|
|
|
class IPythonPTLexer(Lexer):
|
|
"""
|
|
Wrapper around PythonLexer and BashLexer.
|
|
"""
|
|
def __init__(self):
|
|
l = pygments_lexers
|
|
self.python_lexer = PygmentsLexer(l.Python3Lexer)
|
|
self.shell_lexer = PygmentsLexer(l.BashLexer)
|
|
|
|
self.magic_lexers = {
|
|
'HTML': PygmentsLexer(l.HtmlLexer),
|
|
'html': PygmentsLexer(l.HtmlLexer),
|
|
'javascript': PygmentsLexer(l.JavascriptLexer),
|
|
'js': PygmentsLexer(l.JavascriptLexer),
|
|
'perl': PygmentsLexer(l.PerlLexer),
|
|
'ruby': PygmentsLexer(l.RubyLexer),
|
|
'latex': PygmentsLexer(l.TexLexer),
|
|
}
|
|
|
|
def lex_document(self, document):
|
|
text = document.text.lstrip()
|
|
|
|
lexer = self.python_lexer
|
|
|
|
if text.startswith('!') or text.startswith('%%bash'):
|
|
lexer = self.shell_lexer
|
|
|
|
elif text.startswith('%%'):
|
|
for magic, l in self.magic_lexers.items():
|
|
if text.startswith('%%' + magic):
|
|
lexer = l
|
|
break
|
|
|
|
return lexer.lex_document(document)
|