Lib.readline.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
import os.path
import sys
from warnings import warn
try:
_console = sys._jy_console
_reader = _console.reader
except AttributeError:
raise ImportError("Cannot access JLine2 setup")
try:
# jarjar-ed version
from org.python.jline.console.history import MemoryHistory
except ImportError:
# dev version from extlibs
from jline.console.history import MemoryHistory
__all__ = ['add_history', 'clear_history', 'get_begidx', 'get_completer',
'get_completer_delims', 'get_current_history_length',
'get_endidx', 'get_history_item', 'get_history_length',
'get_line_buffer', 'insert_text', 'parse_and_bind',
'read_history_file', 'read_init_file', 'redisplay',
'remove_history_item', 'set_completer', 'set_completer_delims',
'set_history_length', 'set_pre_input_hook', 'set_startup_hook',
'write_history_file']
_history_list = None
# The need for the following warnings should go away once we update
# JLine. Choosing ImportWarning as the closest warning to what is
# going on here, namely this is functionality not yet available on
# Jython.
class NotImplementedWarning(ImportWarning):
"""Not yet implemented by Jython"""
class SecurityWarning(ImportWarning):
"""Security manager prevents access to private field"""
def parse_and_bind(string):
pass
def get_line_buffer():
return str(_reader.cursorBuffer.buffer)
def insert_text(string):
_reader.putString(string)
def read_init_file(filename=None):
warn("read_init_file: %s" % (filename,), NotImplementedWarning, "module", 2)
def read_history_file(filename="~/.history"):
expanded = os.path.expanduser(filename)
with open(expanded) as f:
_reader.history.load(f)
def write_history_file(filename="~/.history"):
expanded = os.path.expanduser(filename)
with open(expanded, 'w') as f:
for line in _reader.history.entries():
f.write(line.value().encode("utf-8"))
f.write("\n")
def clear_history():
_reader.history.clear()
def add_history(line):
_reader.history.add(line)
def get_history_length():
return _reader.history.maxSize
def set_history_length(length):
_reader.history.maxSize = length
def get_current_history_length():
return _reader.history.size()
def get_history_item(index):
# JLine indexes from 0 while readline indexes from 1 (at least in test_readline)
if index>0:
return _reader.history.get(index-1)
else:
return None
def remove_history_item(pos):
_reader.history.remove(pos)
def replace_history_item(pos, line):
_reader.history.set(pos, line)
def redisplay():
_reader.redrawLine()
def set_startup_hook(function=None):
_console.startup_hook = function
def set_pre_input_hook(function=None):
warn("set_pre_input_hook %s" % (function,), NotImplementedWarning, stacklevel=2)
_completer_function = None
def set_completer(function=None):
"""set_completer([function]) -> None
Set or remove the completer function.
The function is called as function(text, state),
for state in 0, 1, 2, ..., until it returns a non-string.
It should return the next possible completion starting with 'text'."""
global _completer_function
_completer_function = function
def complete_handler(buffer, cursor, candidates):
start = _get_delimited(buffer, cursor)[0]
delimited = buffer[start:cursor]
try:
sys.ps2
have_ps2 = True
except AttributeError:
have_ps2 = False
if (have_ps2 and _reader.prompt == sys.ps2) and (not delimited or delimited.isspace()):
# Insert tab (as expanded to 4 spaces), but only if if
# preceding is whitespace/empty and in console
# continuation; this is a planned featue for Python 3 per
# http://bugs.python.org/issue5845
#
# Ideally this would not expand tabs, in case of mixed
# copy&paste of tab-indented code, however JLine2 gets
# confused as to the cursor position if certain, but not
# all, subsequent editing if the tab is backspaced
candidates.add(" " * 4)
return start
# TODO: if there are a reasonably large number of completions
# (need to get specific numbers), CPython 3.4 will show a
# message like so:
# >>>
# Display all 186 possibilities? (y or n)
# Currently Jython arbitrarily limits this to 100 and displays them
for state in xrange(100):
completion = None
try:
completion = function(delimited, state)
except:
pass
if completion:
candidates.add(completion)
else:
break
return start
_reader.addCompleter(complete_handler)
def get_completer():
return _completer_function
def _get_delimited(buffer, cursor):
start = cursor
for i in xrange(cursor-1, -1, -1):
if buffer[i] in _completer_delims:
break
start = i
return start, cursor
def get_begidx():
return _get_delimited(str(_reader.cursorBuffer.buffer), _reader.cursorBuffer.cursor)[0]
def get_endidx():
return _get_delimited(str(_reader.cursorBuffer.buffer), _reader.cursorBuffer.cursor)[1]
def set_completer_delims(string):
global _completer_delims, _completer_delims_set
_completer_delims = string
_completer_delims_set = set(string)
def get_completer_delims():
return _completer_delims
set_completer_delims(' \t\n`~!@#$%^&*()-=+[{]}\\|;:\'",<>/?')