def readline(cursor, max_input=20):
"""A rudimentary readline implementation."""
text = u''
exit_dict = dict([(label, False) for label in EXIT_LABELS])
term = cursor.term
while True:
inp = term.inkey()
if inp.code == term.KEY_ENTER:
exit_dict[ENTER] = True
break
elif inp.code == term.KEY_ESCAPE:
text = None
exit_dict[ESCAPE] = True
break
elif not inp.is_sequence and len(text) < max_input:
text += inp
cursor = csr.right_of(cursor, 1)
echo_at_cell(cursor, inp)
elif inp.code in (term.KEY_BACKSPACE, term.KEY_DELETE):
if len(text) > 0:
text = text[:-1]
echo_at_cell(cursor, u' ')
cursor = csr.left_of(cursor, 1)
return text, exit_dict
def handle_input(self, inp):
term = self.term
if inp == chr(3) or self.exit_signal_received:
if self.logger != None:
self.logger.log("handle_input: exiting")
# ^c exits
return -1
elif self.command != None:
self.handle_command()
if self.logger != None:
self.logger.log("handle_input: calling handle_command, command: {}".format(self.command))
return 0
elif inp.code == term.KEY_ESCAPE:
self.read_command()
if self.logger != None:
self.logger.log("handle_input: called read_command, command: {}".format(self.command))
return 0
elif inp == chr(12):
# ^l refreshes
self.draw()
if self.logger != None:
self.logger.log("handle_input: refreshing, calling draw")
return 0
elif inp.code in [term.KEY_BACKSPACE, term.KEY_DELETE]:
echo_remove_cursor(self.focus_cursor, self.focus_screen, logger=self.logger)
self.focus_cursor = csr.left_of(self.focus_cursor, 1, screen=self.focus_screen, logger=self.logger)
self.focus_screen.delete_cell(self.focus_cursor, logger=self.logger)
return 0
else:
echo_remove_cursor(self.focus_cursor, self.focus_screen, logger=self.logger)
self.focus_cursor, move_made = csr.lookup_move(
inp.code, self.focus_cursor, screen=self.focus_screen, logger=self.logger
)
if move_made:
return 0
if input_filter(inp):
self.logger.log("Attempting to write {} to screen.".format(str(inp)))
self.focus_screen.write_cell(self.focus_cursor, str(inp), logger=self.logger)
echo_remove_cursor(self.focus_cursor, self.focus_screen, logger=self.logger)
self.focus_cursor = csr.right_of(self.focus_cursor, 1, screen=self.focus_screen, logger=self.logger)
return 0
else:
self.logger.log("{} not considered input.".format(str(inp)))
return 1
def read_command(self):
self.reading_command = True
self.draw_command_bar(status=WAITING_FOR_CMD)
if self.logger != None:
self.logger.add_tag("read_command")
self.draw_command_bar(status=WAITING_FOR_CMD)
self.input_bar_cursor = csr.right_of(self.input_bar_cursor, 5)
inp, exit_dict = readline(self.input_bar_cursor, max_input=self.term.width - 5)
if exit_dict["enter"]:
self.command = [substr for substr in inp.split(" ") if substr not in ["", None]]
self.set_status(EDITING)
self.input_bar_text = u""
self.input_bar_cursor = csr.home(self.input_bar_cursor)
echo_at_cell(self.input_bar_cursor, self.term.clear_eol)
self.reading_command = False
if self.logger != None:
self.logger.remove_tag()