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from __future__ import with_statement
import os.path
import sys
from warnings import warn
import java.lang.reflect.Array
__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']
try:
_reader = sys._jy_interpreter.reader
except AttributeError:
raise ImportError("Cannot access JLineConsole")
_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 _setup_history():
# This is obviously not desirable, but avoids O(n) workarounds to
# modify the history (ipython uses the function
# remove_history_item to mutate the history relatively frequently)
global _history_list
history = _reader.history
try:
history_list_field = history.class.getDeclaredField("history")
history_list_field.setAccessible(True)
_history_list = history_list_field.get(history)
except:
pass
_setup_history()
def parse_and_bind(string):
if string == "tab: complete":
try:
keybindings_field = _reader.class.getDeclaredField("keybindings")
keybindings_field.setAccessible(True)
keybindings = keybindings_field.get(_reader)
COMPLETE = _reader.KEYMAP_NAMES.get('COMPLETE')
if java.lang.reflect.Array.getShort(keybindings, 9) != COMPLETE:
java.lang.reflect.Array.setShort(keybindings, 9, COMPLETE)
except:
warn("Cannot bind tab key to complete. You need to do this in a .jlinebindings.properties file instead", SecurityWarning, stacklevel=2)
else:
warn("Cannot bind key %s. You need to do this in a .jlinebindings.properties file instead" % (string,), NotImplementedWarning, stacklevel=2)
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"):
print "Reading history:", filename
expanded = os.path.expanduser(filename)
new_history = _reader.getHistory().getClass()()
# new_history.clear()
with open(expanded) as f:
for line in f:
new_history.addToHistory(line.rstrip())
_reader.history = new_history
_setup_history()
def write_history_file(filename="~/.history"):
expanded = os.path.expanduser(filename)
with open(expanded, 'w') as f:
for line in _reader.history.historyList:
f.write(line)
f.write("\n")
def clear_history():
_reader.history.clear()
def add_history(line):
_reader.addToHistory(line)
def get_history_length():
return _reader.history.maxSize
def set_history_length(length):
_reader.history.maxSize = length
def get_current_history_length():
return len(_reader.history.historyList)
def get_history_item(index):
return _reader.history.historyList[index]
def remove_history_item(pos):
if _history_list:
_history_list.remove(pos)
else:
warn("Cannot remove history item at position: %s" % (pos,), SecurityWarning, stacklevel=2)
def redisplay():
_reader.redrawLine()
def set_startup_hook(function=None):
sys._jy_interpreter.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]
for state in xrange(100): # TODO arbitrary, what's the number used by gnu readline?
completion = None
try:
completion = function(delimited, state)
except:
pass
if completion:
candidates.add(completion)
else:
break
return start
_reader.addCompletor(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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