mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-23 02:25:11 +00:00
135 lines
4.2 KiB
Python
135 lines
4.2 KiB
Python
import os
|
|
|
|
from threading import Lock
|
|
from .utils import compat_os_name, get_windows_version
|
|
|
|
|
|
class MultilinePrinterBase():
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, *args):
|
|
self.end()
|
|
|
|
def print_at_line(self, text, pos):
|
|
pass
|
|
|
|
def end(self):
|
|
pass
|
|
|
|
|
|
class MultilinePrinter(MultilinePrinterBase):
|
|
|
|
def __init__(self, stream, lines):
|
|
"""
|
|
@param stream stream to write to
|
|
@lines number of lines to be written
|
|
"""
|
|
self.stream = stream
|
|
|
|
is_win10 = compat_os_name == 'nt' and get_windows_version() >= (10, )
|
|
self.CARRIAGE_RETURN = '\r'
|
|
if os.getenv('TERM') and self._isatty() or is_win10:
|
|
# reason not to use curses https://github.com/yt-dlp/yt-dlp/pull/1036#discussion_r713851492
|
|
# escape sequences for Win10 https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences
|
|
self.UP = '\x1b[A'
|
|
self.DOWN = '\n'
|
|
self.ERASE_LINE = '\x1b[K'
|
|
self._HAVE_FULLCAP = self._isatty() or is_win10
|
|
else:
|
|
self.UP = self.DOWN = self.ERASE_LINE = None
|
|
self._HAVE_FULLCAP = False
|
|
|
|
# lines are numbered from top to bottom, counting from 0 to self.maximum
|
|
self.maximum = lines - 1
|
|
self.lastline = 0
|
|
self.lastlength = 0
|
|
|
|
self.movelock = Lock()
|
|
|
|
@property
|
|
def have_fullcap(self):
|
|
"""
|
|
True if the TTY is allowing to control cursor,
|
|
so that multiline progress works
|
|
"""
|
|
return self._HAVE_FULLCAP
|
|
|
|
def _isatty(self):
|
|
try:
|
|
return self.stream.isatty()
|
|
except BaseException:
|
|
return False
|
|
|
|
def _move_cursor(self, dest):
|
|
current = min(self.lastline, self.maximum)
|
|
self.stream.write(self.CARRIAGE_RETURN)
|
|
if current == dest:
|
|
# current and dest are at same position, no need to move cursor
|
|
return
|
|
elif current > dest:
|
|
# when maximum == 2,
|
|
# 0. dest
|
|
# 1.
|
|
# 2. current
|
|
self.stream.write(self.UP * (current - dest))
|
|
elif current < dest:
|
|
# when maximum == 2,
|
|
# 0. current
|
|
# 1.
|
|
# 2. dest
|
|
self.stream.write(self.DOWN * (dest - current))
|
|
self.lastline = dest
|
|
|
|
def print_at_line(self, text, pos):
|
|
with self.movelock:
|
|
if self.have_fullcap:
|
|
self._move_cursor(pos)
|
|
self.stream.write(self.ERASE_LINE)
|
|
self.stream.write(text)
|
|
else:
|
|
if self.maximum != 0:
|
|
# let user know about which line is updating the status
|
|
text = f'{pos + 1}: {text}'
|
|
textlen = len(text)
|
|
if self.lastline == pos:
|
|
# move cursor at the start of progress when writing to same line
|
|
self.stream.write(self.CARRIAGE_RETURN)
|
|
if self.lastlength > textlen:
|
|
text += ' ' * (self.lastlength - textlen)
|
|
self.lastlength = textlen
|
|
else:
|
|
# otherwise, break the line
|
|
self.stream.write('\n')
|
|
self.lastlength = 0
|
|
self.stream.write(text)
|
|
self.lastline = pos
|
|
|
|
def end(self):
|
|
with self.movelock:
|
|
# move cursor to the end of the last line, and write line break
|
|
# so that other to_screen calls can precede
|
|
self._move_cursor(self.maximum)
|
|
self.stream.write('\n')
|
|
|
|
|
|
class QuietMultilinePrinter(MultilinePrinterBase):
|
|
def __init__(self):
|
|
self.have_fullcap = True
|
|
|
|
|
|
class BreaklineStatusPrinter(MultilinePrinterBase):
|
|
|
|
def __init__(self, stream, lines):
|
|
"""
|
|
@param stream stream to write to
|
|
"""
|
|
self.stream = stream
|
|
self.maximum = lines
|
|
self.have_fullcap = True
|
|
|
|
def print_at_line(self, text, pos):
|
|
if self.maximum != 0:
|
|
# let user know about which line is updating the status
|
|
text = f'{pos + 1}: {text}'
|
|
self.stream.write(text + '\n')
|