106 lines
3.7 KiB
Python
106 lines
3.7 KiB
Python
|
from __future__ import unicode_literals
|
||
|
|
||
|
from prompt_toolkit.completion import Completer, Completion
|
||
|
import os
|
||
|
|
||
|
__all__ = (
|
||
|
'PathCompleter',
|
||
|
'ExecutableCompleter',
|
||
|
)
|
||
|
|
||
|
|
||
|
class PathCompleter(Completer):
|
||
|
"""
|
||
|
Complete for Path variables.
|
||
|
|
||
|
:param get_paths: Callable which returns a list of directories to look into
|
||
|
when the user enters a relative path.
|
||
|
:param file_filter: Callable which takes a filename and returns whether
|
||
|
this file should show up in the completion. ``None``
|
||
|
when no filtering has to be done.
|
||
|
:param min_input_len: Don't do autocompletion when the input string is shorter.
|
||
|
"""
|
||
|
def __init__(self, only_directories=False, get_paths=None, file_filter=None,
|
||
|
min_input_len=0, expanduser=False):
|
||
|
assert get_paths is None or callable(get_paths)
|
||
|
assert file_filter is None or callable(file_filter)
|
||
|
assert isinstance(min_input_len, int)
|
||
|
assert isinstance(expanduser, bool)
|
||
|
|
||
|
self.only_directories = only_directories
|
||
|
self.get_paths = get_paths or (lambda: ['.'])
|
||
|
self.file_filter = file_filter or (lambda _: True)
|
||
|
self.min_input_len = min_input_len
|
||
|
self.expanduser = expanduser
|
||
|
|
||
|
def get_completions(self, document, complete_event):
|
||
|
text = document.text_before_cursor
|
||
|
|
||
|
# Complete only when we have at least the minimal input length,
|
||
|
# otherwise, we can too many results and autocompletion will become too
|
||
|
# heavy.
|
||
|
if len(text) < self.min_input_len:
|
||
|
return
|
||
|
|
||
|
try:
|
||
|
# Do tilde expansion.
|
||
|
if self.expanduser:
|
||
|
text = os.path.expanduser(text)
|
||
|
|
||
|
# Directories where to look.
|
||
|
dirname = os.path.dirname(text)
|
||
|
if dirname:
|
||
|
directories = [os.path.dirname(os.path.join(p, text))
|
||
|
for p in self.get_paths()]
|
||
|
else:
|
||
|
directories = self.get_paths()
|
||
|
|
||
|
# Start of current file.
|
||
|
prefix = os.path.basename(text)
|
||
|
|
||
|
# Get all filenames.
|
||
|
filenames = []
|
||
|
for directory in directories:
|
||
|
# Look for matches in this directory.
|
||
|
if os.path.isdir(directory):
|
||
|
for filename in os.listdir(directory):
|
||
|
if filename.startswith(prefix):
|
||
|
filenames.append((directory, filename))
|
||
|
|
||
|
# Sort
|
||
|
filenames = sorted(filenames, key=lambda k: k[1])
|
||
|
|
||
|
# Yield them.
|
||
|
for directory, filename in filenames:
|
||
|
completion = filename[len(prefix):]
|
||
|
full_name = os.path.join(directory, filename)
|
||
|
|
||
|
if os.path.isdir(full_name):
|
||
|
# For directories, add a slash to the filename.
|
||
|
# (We don't add them to the `completion`. Users can type it
|
||
|
# to trigger the autocompletion themself.)
|
||
|
filename += '/'
|
||
|
elif self.only_directories:
|
||
|
continue
|
||
|
|
||
|
if not self.file_filter(full_name):
|
||
|
continue
|
||
|
|
||
|
yield Completion(completion, 0, display=filename)
|
||
|
except OSError:
|
||
|
pass
|
||
|
|
||
|
|
||
|
class ExecutableCompleter(PathCompleter):
|
||
|
"""
|
||
|
Complete only excutable files in the current path.
|
||
|
"""
|
||
|
def __init__(self):
|
||
|
PathCompleter.__init__(
|
||
|
self,
|
||
|
only_directories=False,
|
||
|
min_input_len=1,
|
||
|
get_paths=lambda: os.environ.get('PATH', '').split(os.pathsep),
|
||
|
file_filter=lambda name: os.access(name, os.X_OK),
|
||
|
expanduser=True),
|