def init_audio_plugin(interface_name):
""" Find and initialise audio plugin for given interface. """
names = audio_backends[interface_name]
for audio_name in names:
if audio.init(audio_name):
return interface_name
logging.debug('Could not initialise %s plugin.', audio_name)
logging.error(
'Null sound plugin malfunction. Could not initialise interface.')
raise error.Exit()
def check_input():
""" Handle input events. """
while True:
try:
signal = input_queue.get(False)
except Queue.Empty:
if not state.console_state.keyb.pause:
break
else:
time.sleep(tick_s)
continue
# we're on it
input_queue.task_done()
if signal.event_type == KEYB_QUIT:
raise error.Exit()
elif signal.event_type == KEYB_CHAR:
# params is a unicode sequence
state.console_state.keyb.insert_chars(*signal.params)
elif signal.event_type == KEYB_DOWN:
# params is e-ASCII/unicode character sequence, scancode, modifier
state.console_state.keyb.key_down(*signal.params)
elif signal.event_type == KEYB_UP:
state.console_state.keyb.key_up(*signal.params)
elif signal.event_type == PEN_DOWN:
state.console_state.pen.down(*signal.params)
elif signal.event_type == PEN_UP:
state.console_state.pen.up()
elif signal.event_type == PEN_MOVED:
state.console_state.pen.moved(*signal.params)
elif signal.event_type == STICK_DOWN:
state.console_state.stick.down(*signal.params)
elif signal.event_type == STICK_UP:
state.console_state.stick.up(*signal.params)
elif signal.event_type == STICK_MOVED:
state.console_state.stick.moved(*signal.params)
elif signal.event_type == CLIP_PASTE:
text = clipboard_handler.paste(*signal.params)
state.console_state.keyb.insert_chars(text, check_full=False)
elif signal.event_type == CLIP_COPY:
text = state.console_state.screen.get_text(*(signal.params[:4]))
clipboard_handler.copy(text, signal.params[-1])
def prepare_console():
""" Initialise backend and console. """
import state
import backend
import sound
# load backend modules
# this can't be done in backend.py as it would create circular dependency
import console
import error
import fp
# we need this prepared for input to work,
# even if we don't use any function from it
import redirect
# hack: mark modules for inclusion by pyinstaller
# see https://groups.google.com/forum/#!topic/pyinstaller/S8QgHXiGJ_A
if False:
import video_none
import video_curses
import video_ansi
import video_cli
import video_pygame
import audio_none
import audio_beep
import audio_pygame
backends = {
'none': ('video_none', 'audio_none'),
'cli': ('video_cli', 'audio_beep'),
'text': ('video_curses', 'audio_beep'),
'ansi': ('video_ansi', 'audio_beep'),
'graphical': ('video_pygame', 'audio_pygame'),
}
if not config.get('interface'):
config.options['interface'] = 'graphical'
# select interface
video_name, audio_name = backends[config.get('interface')]
# initialise video backend before console
while True:
try:
# __name__ global is needed when calling from setuptools package
video = __import__(video_name, globals={"__name__": __name__})
except ImportError as e:
video = None
if not video:
if not video_name or video_name == 'video_none':
logging.error('Failed to initialise interface.')
raise error.Exit()
logging.error('Could not load module %s.', video_name)
video_name = 'video_none'
continue
if backend.init_video(video):
break
else:
video_name = video.fallback
if video:
video.close()
if video_name:
logging.info('Falling back to %s interface.', video_name)
if config.get('nosound'):
sound.audio = __import__('audio_none', globals={"__name__": __name__})
else:
sound.audio = __import__(audio_name, globals={"__name__": __name__})
if not sound.init():
sound.audio = __import__('audio_none', globals={"__name__": __name__})
sound.init()
logging.warning(
'Failed to initialise sound. Sound will be disabled.\r')
if not state.loaded:
console.init_mode()
# set the output for maths error messages
fp.init(error_stream=console)
return backend, console
def wait_interactive(prompt_width):
""" Manage the interactive mode. """
# force cursor visibility in all cases
state.console_state.screen.cursor.show(True)
try:
# this is where we started
start_row = state.console_state.row
furthest_left = 1 + prompt_width
# this is where we arrow-keyed on the start line
furthest_right = state.console_state.col
while True:
row, col = state.console_state.row, state.console_state.col
if row == start_row:
furthest_left = min(col, furthest_left)
furthest_right = max(col, furthest_right)
if col == state.console_state.screen.mode.width and state.console_state.overflow:
furthest_right += 1
# wait_char returns one e-ASCII code
d = state.console_state.keyb.get_char_block()
# insert dbcs chars from keyboard buffer two bytes at a time
if (d in state.console_state.codepage.lead
and state.console_state.keyb.buf.peek()
in state.console_state.codepage.trail):
d += state.console_state.keyb.buf.getc()
if not d:
# input stream closed
raise error.Exit()
if d in ('\0\x48', '\x1e', '\0\x50', '\x1f', '\0\x4d', '\x1c',
'\0\x4B', '\x1d', '\0\x47', '\x0b', '\0\x4f', '\x0e'):
# arrow keys drop us out of insert mode
set_overwrite_mode(True)
if d == '\x03':
# CTRL-C -- only caught here, not in wait_char like <CTRL+BREAK>
raise error.Break()
elif d == '\r':
# ENTER, CTRL+M
break
elif d == '\a':
# BEL, CTRL+G
state.console_state.sound.beep()
elif d == '\b':
# BACKSPACE, CTRL+H
backspace(start_row, furthest_left)
elif d == '\t':
# TAB, CTRL+I
tab()
elif d == '\n':
# CTRL+ENTER, CTRL+J
line_feed()
elif d == '\x1b':
# ESC, CTRL+[
clear_line(row, furthest_left)
elif d in ('\0\x75', '\x05'):
# CTRL+END, CTRL+E
clear_rest_of_line(row, col)
elif d in ('\0\x48', '\x1e'):
# UP, CTRL+6
set_pos(row - 1, col, scroll_ok=False)
elif d in ('\0\x50', '\x1f'):
# DOWN, CTRL+-
set_pos(row + 1, col, scroll_ok=False)
elif d in ('\0\x4D', '\x1c'):
# RIGHT, CTRL+\
# skip dbcs trail byte
if state.console_state.screen.apage.row[row -
1].double[col -
1] == 1:
set_pos(row, col + 2, scroll_ok=False)
else:
set_pos(row, col + 1, scroll_ok=False)
elif d in ('\0\x4b', '\x1d'):
# LEFT, CTRL+]
set_pos(row, col - 1, scroll_ok=False)
elif d in ('\0\x74', '\x06'):
# CTRL+RIGHT, CTRL+F
skip_word_right()
elif d in ('\0\x73', '\x02'):
# CTRL+LEFT, CTRL+B
skip_word_left()
elif d in ('\0\x52', '\x12'):
# INS, CTRL+R
set_overwrite_mode(not state.console_state.overwrite_mode)
elif d in ('\0\x53', '\x7f'):
# DEL, CTRL+BACKSPACE
delete_char(row, col)
elif d in ('\0\x47', '\x0b'):
# HOME, CTRL+K
set_pos(1, 1)
elif d in ('\0\x4f', '\x0e'):
# END, CTRL+N
end()
elif d in ('\0\x77', '\x0c'):
# CTRL+HOME, CTRL+L
clear()
else:
try:
# these are done on a less deep level than the fn key macros
letters = list(alt_key_replace[d]) + [' ']
except KeyError:
letters = [d]
for d in letters:
# ignore eascii by this point, but not dbcs
if d[0] not in ('\0', '\r'):
if not state.console_state.overwrite_mode:
for c in d:
insert(row, col, c,
state.console_state.screen.attr)
# row and col have changed
state.console_state.screen.redraw_row(
col - 1, row)
col += 1
set_pos(state.console_state.row,
state.console_state.col + len(d))
else:
# put all dbcs in before messing with cursor position
for c in d:
put_char(c, do_scroll_down=True)
# move left if we end up on dbcs trail byte
row, col = state.console_state.row, state.console_state.col
if state.console_state.screen.apage.row[row - 1].double[col -
1] == 2:
set_pos(row, col - 1, scroll_ok=False)
# adjust cursor width
row, col = state.console_state.row, state.console_state.col
if state.console_state.screen.apage.row[row - 1].double[col -
1] == 1:
state.console_state.screen.cursor.set_width(2)
else:
state.console_state.screen.cursor.set_width(1)
finally:
set_overwrite_mode(True)
# reset cursor visibility
state.console_state.screen.cursor.reset_visibility()
return start_row, furthest_left, furthest_right