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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.startupHook = 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`~!@#$%^&*()-=+[{]}\\|;:\'",<>/?')
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