def __init__(
self, term=None, max_value=100, width="25%", title_pos="left",
title="Progress", num_rep="fraction", indent=0, filled_color=2,
empty_color=7, back_color=None, filled_char=u' ',
empty_char=u' ', start_char=u'', end_char=u'', fallback=True,
fallback_empty_char=u'◯', fallback_filled_char=u'◉',
force_color=None
):
self.cursor = Cursor(term)
self.term = self.cursor.term
self._measure_terminal()
self._width_str = width
self._max_value = max_value
ensure(title_pos in ["left", "right", "above", "below"], ValueError,
"Invalid choice for title position.")
self._title_pos = title_pos
self._title = title
ensure(num_rep in ["fraction", "percentage"], ValueError,
"num_rep must be either 'fraction' or 'percentage'.")
self._num_rep = num_rep
ensure(indent < self.columns, ValueError,
"Indent must be smaller than terminal width.")
self._indent = indent
self._start_char = start_char
self._end_char = end_char
# Setup callables and characters depending on if terminal has
# has color support
if force_color is not None:
supports_colors = force_color
else:
supports_colors = self._supports_colors(
term=self.term,
raise_err=not fallback,
colors=(filled_color, empty_color)
)
if supports_colors:
self._filled_char = filled_char
self._empty_char = empty_char
self._filled = self._get_format_callable(
term=self.term,
color=filled_color,
back_color=back_color
)
self._empty = self._get_format_callable(
term=self.term,
color=empty_color,
back_color=back_color
)
else:
self._empty_char = fallback_empty_char
self._filled_char = fallback_filled_char
self._filled = self._empty = lambda s: s
ensure(self.full_line_width <= self.columns, WidthOverflowError,
"Attempting to initialize Bar with full_line_width {}; "
"terminal has width of only {}.".format(
self.full_line_width,
self.columns))
def __init__(self,
term=None,
max_value=100,
width="25%",
title_pos="left",
title="Progress",
num_rep="fraction",
indent=0,
filled_color=2,
empty_color=7,
back_color=None,
filled_char=u' ',
empty_char=u' ',
start_char=u'',
end_char=u'',
fallback=True,
fallback_empty_char=u'◯',
fallback_filled_char=u'◉',
force_color=None):
self.cursor = Cursor(term)
self.term = self.cursor.term
self._measure_terminal()
self._width_str = width
self._max_value = max_value
ensure(title_pos in ["left", "right", "above", "below"], ValueError,
"Invalid choice for title position.")
self._title_pos = title_pos
self._title = title
ensure(num_rep in ["fraction", "percentage"], ValueError,
"num_rep must be either 'fraction' or 'percentage'.")
self._num_rep = num_rep
ensure(indent < self.columns, ValueError,
"Indent must be smaller than terminal width.")
self._indent = indent
self._start_char = start_char
self._end_char = end_char
# Setup callables and characters depending on if terminal has
# has color support
if force_color is not None:
supports_colors = force_color
else:
supports_colors = self._supports_colors(term=self.term,
raise_err=not fallback,
colors=(filled_color,
empty_color))
if supports_colors:
self._filled_char = filled_char
self._empty_char = empty_char
self._filled = self._get_format_callable(term=self.term,
color=filled_color,
back_color=back_color)
self._empty = self._get_format_callable(term=self.term,
color=empty_color,
back_color=back_color)
else:
self._empty_char = fallback_empty_char
self._filled_char = fallback_filled_char
self._filled = self._empty = lambda s: s
ensure(
self.full_line_width <= self.columns, WidthOverflowError,
"Attempting to initialize Bar with full_line_width {}; "
"terminal has width of only {}.".format(self.full_line_width,
self.columns))
class Bar(object):
"""Progress Bar with blessings
Several parts of this class are thanks to Erik Rose's implementation
of ``ProgressBar`` in ``nose-progressive``, licensed under
The MIT License.
`MIT <http://opensource.org/licenses/MIT>`_
`nose-progressive/noseprogressive/bar.py <https://github.com/erikrose/nose-progressive/blob/master/noseprogressive/bar.py>`_
Terminal with 256 colors is recommended. See
`this <http://pastelinux.wordpress.com/2010/12/01/upgrading-linux-terminal-to-256-colors/>`_ for Ubuntu
installation as an example.
:type term: blessings.Terminal|NoneType
:param term: blessings.Terminal instance for the terminal of display
:type max_value: int
:param max_value: The capacity of the bar, i.e., ``value/max_value``
:type width: str
:param width: Must be of format {num: int}{unit: c|%}. Unit "c"
can be used to specify number of maximum columns; unit "%".
to specify percentage of the total terminal width to use.
e.g., "20c", "25%", etc.
:type title_pos: str
:param title_pos: Position of title relative to the progress bar;
can be any one of ["left", "right", "above", "below"]
:type title: str
:param title: Title of the progress bar
:type num_rep: str
:param num_rep: Numeric representation of completion;
can be one of ["fraction", "percentage"]
:type indent: int
:param indent: Spaces to indent the bar from the left-hand side
:type filled_color: str|int
:param filled_color: color of the ``filled_char``; can be a string
of the color's name or number representing the color; see the
``blessings`` documentation for details
:type empty_color: str|int
:param empty_color: color of the ``empty_char``
:type back_color: str|NoneType
:param back_color: Background color of the progress bar; must be
a string of the color name, unused if numbers used for
``filled_color`` and ``empty_color``. If set to None,
will not be used.
:type filled_char: unicode
:param filled_char: Character representing completeness on the
progress bar
:type empty_char: unicode
:param empty_char: The complement to ``filled_char``
:type start_char: unicode
:param start_char: Character at the start of the progress bar
:type end_char: unicode
:param end_char: Character at the end of the progress bar
:type fallback: bool
:param fallback: If this is set, if the terminal does not support
provided colors, this will fall back to plain formatting
that works on terminals with no color support, using the
provided ``fallback_empty_char` and ``fallback_filled_char``
:type force_color: bool|NoneType
:param force_color: ``True`` forces color to be used even if it
may not be supported by the terminal; ``False`` forces use of
the fallback formatting; ``None`` does not force anything
and allows automatic detection as usual.
"""
def __init__(
self, term=None, max_value=100, width="25%", title_pos="left",
title="Progress", num_rep="fraction", indent=0, filled_color=2,
empty_color=7, back_color=None, filled_char=u' ',
empty_char=u' ', start_char=u'', end_char=u'', fallback=True,
fallback_empty_char=u'◯', fallback_filled_char=u'◉',
force_color=None
):
self.cursor = Cursor(term)
self.term = self.cursor.term
self._measure_terminal()
self._width_str = width
self._max_value = max_value
ensure(title_pos in ["left", "right", "above", "below"], ValueError,
"Invalid choice for title position.")
self._title_pos = title_pos
self._title = title
ensure(num_rep in ["fraction", "percentage"], ValueError,
"num_rep must be either 'fraction' or 'percentage'.")
self._num_rep = num_rep
ensure(indent < self.columns, ValueError,
"Indent must be smaller than terminal width.")
self._indent = indent
self._start_char = start_char
self._end_char = end_char
# Setup callables and characters depending on if terminal has
# has color support
if force_color is not None:
supports_colors = force_color
else:
supports_colors = self._supports_colors(
term=self.term,
raise_err=not fallback,
colors=(filled_color, empty_color)
)
if supports_colors:
self._filled_char = filled_char
self._empty_char = empty_char
self._filled = self._get_format_callable(
term=self.term,
color=filled_color,
back_color=back_color
)
self._empty = self._get_format_callable(
term=self.term,
color=empty_color,
back_color=back_color
)
else:
self._empty_char = fallback_empty_char
self._filled_char = fallback_filled_char
self._filled = self._empty = lambda s: s
ensure(self.full_line_width <= self.columns, WidthOverflowError,
"Attempting to initialize Bar with full_line_width {}; "
"terminal has width of only {}.".format(
self.full_line_width,
self.columns))
######################
# Public Attributes #
######################
@property
def max_width(self):
"""Get maximum width of progress bar
:rtype: int
:returns: Maximum column width of progress bar
"""
value, unit = float(self._width_str[:-1]), self._width_str[-1]
ensure(unit in ["c", "%"], ValueError,
"Width unit must be either 'c' or '%'")
if unit == "c":
ensure(value <= self.columns, ValueError,
"Terminal only has {} columns, cannot draw "
"bar of size {}.".format(self.columns, value))
retval = value
else: # unit == "%"
ensure(0 < value <= 100, ValueError,
"value=={} does not satisfy 0 < value <= 100".format(value))
dec = value / 100
retval = dec * self.columns
return floor(retval)
@property
def full_line_width(self):
"""Find actual length of bar_str
e.g., Progress [ | ] 10/10
"""
bar_str_len = sum([
self._indent,
((len(self.title) + 1) if self._title_pos in ["left", "right"]
else 0), # Title if present
len(self.start_char),
self.max_width, # Progress bar
len(self.end_char),
1, # Space between end_char and amount_complete_str
len(str(self.max_value)) * 2 + 1 # 100/100
])
return bar_str_len
@property
def filled(self):
"""Callable for drawing filled portion of progress bar
:rtype: callable
"""
return self._filled
@property
def empty(self):
"""Callable for drawing empty portion of progress bar
:rtype: callable
"""
return self._empty
@property
def max_value(self):
"""The capacity of the bar, i.e., ``value/max_value``"""
return self._max_value
@max_value.setter
def max_value(self, val):
self._max_value = val
@property
def title(self):
"""Title of the progress bar"""
return self._title
@title.setter
def title(self, t):
self._title = t
@property
def start_char(self):
"""Character at the start of the progress bar"""
return self._start_char
@start_char.setter
def start_char(self, c):
self._start_char = c
@property
def end_char(self):
"""Character at the end of the progress bar"""
return self._end_char
@end_char.setter
def end_char(self, c):
self._end_char = c
###################
# Private Methods #
###################
@staticmethod
def _supports_colors(term, raise_err, colors):
"""Check if ``term`` supports ``colors``
:raises ColorUnsupportedError: This is raised if ``raise_err``
is ``False`` and a color in ``colors`` is unsupported by ``term``
:type raise_err: bool
:param raise_err: Set to ``False`` to return a ``bool`` indicating
color support rather than raising ColorUnsupportedError
:type colors: [str, ...]
"""
for color in colors:
try:
if isinstance(color, str):
req_colors = 16 if "bright" in color else 8
ensure(term.number_of_colors >= req_colors,
ColorUnsupportedError,
"{} is unsupported by your terminal.".format(color))
elif isinstance(color, int):
ensure(term.number_of_colors >= color,
ColorUnsupportedError,
"{} is unsupported by your terminal.".format(color))
except ColorUnsupportedError as e:
if raise_err:
raise e
else:
return False
else:
return True
@staticmethod
def _get_format_callable(term, color, back_color):
"""Get string-coloring callable
Get callable for string output using ``color`` on ``back_color``
on ``term``
:param term: blessings.Terminal instance
:param color: Color that callable will color the string it's passed
:param back_color: Back color for the string
:returns: callable(s: str) -> str
"""
if isinstance(color, str):
ensure(
any(isinstance(back_color, t) for t in [str, type(None)]),
TypeError,
"back_color must be a str or NoneType"
)
if back_color:
return getattr(term, "_".join(
[color, "on", back_color]
))
elif back_color is None:
return getattr(term, color)
elif isinstance(color, int):
return term.on_color(color)
else:
raise TypeError("Invalid type {} for color".format(
type(color)
))
def _measure_terminal(self):
self.lines, self.columns = (
self.term.height or 24,
self.term.width or 80
)
def _write(self, s, s_length=None, flush=False, ignore_overflow=False,
err_msg=None):
"""Write ``s``
:type s: str|unicode
:param s: String to write
:param s_length: Custom length of ``s``
:param flush: Set this to flush the terminal stream after writing
:param ignore_overflow: Set this to ignore if s will exceed
the terminal's width
:param err_msg: The error message given to WidthOverflowError
if it is triggered
"""
if not ignore_overflow:
s_length = len(s) if s_length is None else s_length
if err_msg is None:
err_msg = (
"Terminal has {} columns; attempted to write "
"a string {} of length {}.".format(
self.columns, repr(s), s_length)
)
ensure(s_length <= self.columns, WidthOverflowError, err_msg)
self.cursor.write(s)
if flush:
self.cursor.flush()
##################
# Public Methods #
##################
def draw(self, value, newline=True, flush=True):
"""Draw the progress bar
:type value: int
:param value: Progress value relative to ``self.max_value``
:type newline: bool
:param newline: If this is set, a newline will be written after drawing
"""
# This is essentially winch-handling without having
# to do winch-handling; cleanly redrawing on winch is difficult
# and out of the intended scope of this class; we *can*
# however, adjust the next draw to be proper by re-measuring
# the terminal since the code is mostly written dynamically
# and many attributes and dynamically calculated properties.
self._measure_terminal()
amount_complete = value / self.max_value
fill_amount = int(floor(amount_complete * self.max_width))
empty_amount = self.max_width - fill_amount
# e.g., '10/20' if 'fraction' or '50%' if 'percentage'
amount_complete_str = (
u"{}/{}".format(value, self.max_value)
if self._num_rep == "fraction" else
u"{}%".format(int(floor(amount_complete * 100)))
)
# Write title if supposed to be above
if self._title_pos == "above":
title_str = u"{}{}\n".format(
" " * self._indent,
self.title,
)
self._write(title_str, ignore_overflow=True)
# Construct just the progress bar
bar_str = u''.join([
u(self.filled(self._filled_char * fill_amount)),
u(self.empty(self._empty_char * empty_amount)),
])
# Wrap with start and end character
bar_str = u"{}{}{}".format(self.start_char, bar_str, self.end_char)
# Add on title if supposed to be on left or right
if self._title_pos == "left":
bar_str = u"{} {}".format(self.title, bar_str)
elif self._title_pos == "right":
bar_str = u"{} {}".format(bar_str, self.title)
# Add indent
bar_str = u''.join([" " * self._indent, bar_str])
# Add complete percentage or fraction
bar_str = u"{} {}".format(bar_str, amount_complete_str)
# Set back to normal after printing
bar_str = u"{}{}".format(bar_str, self.term.normal)
# Finally, write the completed bar_str
self._write(bar_str, s_length=self.full_line_width)
# Write title if supposed to be below
if self._title_pos == "below":
title_str = u"\n{}{}".format(
" " * self._indent,
self.title,
)
self._write(title_str, ignore_overflow=True)
# Newline to wrap up
if newline:
self.cursor.newline()
if flush:
self.cursor.flush()
class Bar(object):
"""Progress Bar with blessings
Several parts of this class are thanks to Erik Rose's implementation
of ``ProgressBar`` in ``nose-progressive``, licensed under
The MIT License.
`MIT <http://opensource.org/licenses/MIT>`_
`nose-progressive/noseprogressive/bar.py <https://github.com/erikrose/nose-progressive/blob/master/noseprogressive/bar.py>`_
Terminal with 256 colors is recommended. See
`this <http://pastelinux.wordpress.com/2010/12/01/upgrading-linux-terminal-to-256-colors/>`_ for Ubuntu
installation as an example.
:type term: blessings.Terminal|NoneType
:param term: blessings.Terminal instance for the terminal of display
:type max_value: int
:param max_value: The capacity of the bar, i.e., ``value/max_value``
:type width: str
:param width: Must be of format {num: int}{unit: c|%}. Unit "c"
can be used to specify number of maximum columns; unit "%".
to specify percentage of the total terminal width to use.
e.g., "20c", "25%", etc.
:type title_pos: str
:param title_pos: Position of title relative to the progress bar;
can be any one of ["left", "right", "above", "below"]
:type title: str
:param title: Title of the progress bar
:type num_rep: str
:param num_rep: Numeric representation of completion;
can be one of ["fraction", "percentage"]
:type indent: int
:param indent: Spaces to indent the bar from the left-hand side
:type filled_color: str|int
:param filled_color: color of the ``filled_char``; can be a string
of the color's name or number representing the color; see the
``blessings`` documentation for details
:type empty_color: str|int
:param empty_color: color of the ``empty_char``
:type back_color: str|NoneType
:param back_color: Background color of the progress bar; must be
a string of the color name, unused if numbers used for
``filled_color`` and ``empty_color``. If set to None,
will not be used.
:type filled_char: unicode
:param filled_char: Character representing completeness on the
progress bar
:type empty_char: unicode
:param empty_char: The complement to ``filled_char``
:type start_char: unicode
:param start_char: Character at the start of the progress bar
:type end_char: unicode
:param end_char: Character at the end of the progress bar
:type fallback: bool
:param fallback: If this is set, if the terminal does not support
provided colors, this will fall back to plain formatting
that works on terminals with no color support, using the
provided ``fallback_empty_char` and ``fallback_filled_char``
:type force_color: bool|NoneType
:param force_color: ``True`` forces color to be used even if it
may not be supported by the terminal; ``False`` forces use of
the fallback formatting; ``None`` does not force anything
and allows automatic detection as usual.
"""
def __init__(self,
term=None,
max_value=100,
width="25%",
title_pos="left",
title="Progress",
num_rep="fraction",
indent=0,
filled_color=2,
empty_color=7,
back_color=None,
filled_char=u' ',
empty_char=u' ',
start_char=u'',
end_char=u'',
fallback=True,
fallback_empty_char=u'◯',
fallback_filled_char=u'◉',
force_color=None):
self.cursor = Cursor(term)
self.term = self.cursor.term
self._measure_terminal()
self._width_str = width
self._max_value = max_value
ensure(title_pos in ["left", "right", "above", "below"], ValueError,
"Invalid choice for title position.")
self._title_pos = title_pos
self._title = title
ensure(num_rep in ["fraction", "percentage"], ValueError,
"num_rep must be either 'fraction' or 'percentage'.")
self._num_rep = num_rep
ensure(indent < self.columns, ValueError,
"Indent must be smaller than terminal width.")
self._indent = indent
self._start_char = start_char
self._end_char = end_char
# Setup callables and characters depending on if terminal has
# has color support
if force_color is not None:
supports_colors = force_color
else:
supports_colors = self._supports_colors(term=self.term,
raise_err=not fallback,
colors=(filled_color,
empty_color))
if supports_colors:
self._filled_char = filled_char
self._empty_char = empty_char
self._filled = self._get_format_callable(term=self.term,
color=filled_color,
back_color=back_color)
self._empty = self._get_format_callable(term=self.term,
color=empty_color,
back_color=back_color)
else:
self._empty_char = fallback_empty_char
self._filled_char = fallback_filled_char
self._filled = self._empty = lambda s: s
ensure(
self.full_line_width <= self.columns, WidthOverflowError,
"Attempting to initialize Bar with full_line_width {}; "
"terminal has width of only {}.".format(self.full_line_width,
self.columns))
######################
# Public Attributes #
######################
@property
def max_width(self):
"""Get maximum width of progress bar
:rtype: int
:returns: Maximum column width of progress bar
"""
value, unit = float(self._width_str[:-1]), self._width_str[-1]
ensure(unit in ["c", "%"], ValueError,
"Width unit must be either 'c' or '%'")
if unit == "c":
ensure(
value <= self.columns, ValueError,
"Terminal only has {} columns, cannot draw "
"bar of size {}.".format(self.columns, value))
retval = value
else: # unit == "%"
ensure(0 < value <= 100, ValueError,
"value=={} does not satisfy 0 < value <= 100".format(value))
dec = value / 100
retval = dec * self.columns
return floor(retval)
@property
def full_line_width(self):
"""Find actual length of bar_str
e.g., Progress [ | ] 10/10
"""
bar_str_len = sum([
self._indent,
((len(self.title) + 1) if self._title_pos in ["left", "right"] else
0), # Title if present
len(self.start_char),
self.max_width, # Progress bar
len(self.end_char),
1, # Space between end_char and amount_complete_str
len(str(self.max_value)) * 2 + 1 # 100/100
])
return bar_str_len
@property
def filled(self):
"""Callable for drawing filled portion of progress bar
:rtype: callable
"""
return self._filled
@property
def empty(self):
"""Callable for drawing empty portion of progress bar
:rtype: callable
"""
return self._empty
@property
def max_value(self):
"""The capacity of the bar, i.e., ``value/max_value``"""
return self._max_value
@max_value.setter
def max_value(self, val):
self._max_value = val
@property
def title(self):
"""Title of the progress bar"""
return self._title
@title.setter
def title(self, t):
self._title = t
@property
def start_char(self):
"""Character at the start of the progress bar"""
return self._start_char
@start_char.setter
def start_char(self, c):
self._start_char = c
@property
def end_char(self):
"""Character at the end of the progress bar"""
return self._end_char
@end_char.setter
def end_char(self, c):
self._end_char = c
###################
# Private Methods #
###################
@staticmethod
def _supports_colors(term, raise_err, colors):
"""Check if ``term`` supports ``colors``
:raises ColorUnsupportedError: This is raised if ``raise_err``
is ``False`` and a color in ``colors`` is unsupported by ``term``
:type raise_err: bool
:param raise_err: Set to ``False`` to return a ``bool`` indicating
color support rather than raising ColorUnsupportedError
:type colors: [str, ...]
"""
for color in colors:
try:
if isinstance(color, str):
req_colors = 16 if "bright" in color else 8
ensure(term.number_of_colors >= req_colors,
ColorUnsupportedError,
"{} is unsupported by your terminal.".format(color))
elif isinstance(color, int):
ensure(term.number_of_colors >= color,
ColorUnsupportedError,
"{} is unsupported by your terminal.".format(color))
except ColorUnsupportedError as e:
if raise_err:
raise e
else:
return False
else:
return True
@staticmethod
def _get_format_callable(term, color, back_color):
"""Get string-coloring callable
Get callable for string output using ``color`` on ``back_color``
on ``term``
:param term: blessings.Terminal instance
:param color: Color that callable will color the string it's passed
:param back_color: Back color for the string
:returns: callable(s: str) -> str
"""
if isinstance(color, str):
ensure(any(isinstance(back_color, t)
for t in [str, type(None)]), TypeError,
"back_color must be a str or NoneType")
if back_color:
return getattr(term, "_".join([color, "on", back_color]))
elif back_color is None:
return getattr(term, color)
elif isinstance(color, int):
return term.on_color(color)
else:
raise TypeError("Invalid type {} for color".format(type(color)))
def _measure_terminal(self):
self.lines, self.columns = (self.term.height or 24, self.term.width
or 80)
def _write(self,
s,
s_length=None,
flush=False,
ignore_overflow=False,
err_msg=None):
"""Write ``s``
:type s: str|unicode
:param s: String to write
:param s_length: Custom length of ``s``
:param flush: Set this to flush the terminal stream after writing
:param ignore_overflow: Set this to ignore if s will exceed
the terminal's width
:param err_msg: The error message given to WidthOverflowError
if it is triggered
"""
if not ignore_overflow:
s_length = len(s) if s_length is None else s_length
if err_msg is None:
err_msg = ("Terminal has {} columns; attempted to write "
"a string {} of length {}.".format(
self.columns, repr(s), s_length))
ensure(s_length <= self.columns, WidthOverflowError, err_msg)
self.cursor.write(s)
if flush:
self.cursor.flush()
##################
# Public Methods #
##################
def draw(self, value, newline=True, flush=True):
"""Draw the progress bar
:type value: int
:param value: Progress value relative to ``self.max_value``
:type newline: bool
:param newline: If this is set, a newline will be written after drawing
"""
# This is essentially winch-handling without having
# to do winch-handling; cleanly redrawing on winch is difficult
# and out of the intended scope of this class; we *can*
# however, adjust the next draw to be proper by re-measuring
# the terminal since the code is mostly written dynamically
# and many attributes and dynamically calculated properties.
self._measure_terminal()
amount_complete = value / self.max_value
fill_amount = int(floor(amount_complete * self.max_width))
empty_amount = self.max_width - fill_amount
# e.g., '10/20' if 'fraction' or '50%' if 'percentage'
amount_complete_str = (u"{}/{}".format(value, self.max_value) if
self._num_rep == "fraction" else u"{}%".format(
int(floor(amount_complete * 100))))
# Write title if supposed to be above
if self._title_pos == "above":
title_str = u"{}{}\n".format(
" " * self._indent,
self.title,
)
self._write(title_str, ignore_overflow=True)
# Construct just the progress bar
bar_str = u''.join([
u(self.filled(self._filled_char * fill_amount)),
u(self.empty(self._empty_char * empty_amount)),
])
# Wrap with start and end character
bar_str = u"{}{}{}".format(self.start_char, bar_str, self.end_char)
# Add on title if supposed to be on left or right
if self._title_pos == "left":
bar_str = u"{} {}".format(self.title, bar_str)
elif self._title_pos == "right":
bar_str = u"{} {}".format(bar_str, self.title)
# Add indent
bar_str = u''.join([" " * self._indent, bar_str])
# Add complete percentage or fraction
bar_str = u"{} {}".format(bar_str, amount_complete_str)
# Set back to normal after printing
bar_str = u"{}{}".format(bar_str, self.term.normal)
# Finally, write the completed bar_str
self._write(bar_str, s_length=self.full_line_width)
# Write title if supposed to be below
if self._title_pos == "below":
title_str = u"\n{}{}".format(
" " * self._indent,
self.title,
)
self._write(title_str, ignore_overflow=True)
# Newline to wrap up
if newline:
self.cursor.newline()
if flush:
self.cursor.flush()
def __init__(self, term=None, indent=4):
self.cursor = Cursor(term)
self.indent = indent
class ProgressTree(object):
"""Progress display for trees
For drawing a hierarchical progress view from a tree
:type term: NoneType|blessings.Terminal
:param term: Terminal instance; if not given, will be created by the class
:type indent: int
:param indent: The amount of indentation between each level in hierarchy
"""
def __init__(self, term=None, indent=4):
self.cursor = Cursor(term)
self.indent = indent
##################
# Public Methods #
##################
def draw(self, tree, bar_desc=None, save_cursor=True, flush=True):
"""Draw ``tree`` to the terminal
:type tree: dict
:param tree: ``tree`` should be a tree representing a hierarchy; each
key should be a string describing that hierarchy level and value
should also be ``dict`` except for leaves which should be
``BarDescriptors``. See ``BarDescriptor`` for a tree example.
:type bar_desc: BarDescriptor|NoneType
:param bar_desc: For describing non-leaf bars in that will be
drawn from ``tree``; certain attributes such as ``value``
and ``kwargs["max_value"]`` will of course be overridden
if provided.
:type flush: bool
:param flush: If this is set, output written will be flushed
:type save_cursor: bool
:param save_cursor: If this is set, cursor location will be saved before
drawing; this will OVERWRITE a previous save, so be sure to set
this accordingly (to your needs).
"""
if save_cursor:
self.cursor.save()
tree = deepcopy(tree)
# TODO: Automatically collapse hierarchy so something
# will always be displayable (well, unless the top-level)
# contains too many to display
lines_required = self.lines_required(tree)
ensure(lines_required <= self.cursor.term.height,
LengthOverflowError,
"Terminal is not long ({} rows) enough to fit all bars "
"({} rows).".format(self.cursor.term.height, lines_required))
bar_desc = BarDescriptor(type=Bar) if not bar_desc else bar_desc
self._calculate_values(tree, bar_desc)
self._draw(tree)
if flush:
self.cursor.flush()
def make_room(self, tree):
"""Clear lines in terminal below current cursor position as required
This is important to do before drawing to ensure sufficient
room at the bottom of your terminal.
:type tree: dict
:param tree: tree as described in ``BarDescriptor``
"""
lines_req = self.lines_required(tree)
self.cursor.clear_lines(lines_req)
def lines_required(self, tree, count=0):
"""Calculate number of lines required to draw ``tree``"""
if all([
isinstance(tree, dict),
type(tree) != BarDescriptor
]):
return sum(self.lines_required(v, count=count)
for v in tree.values()) + 2
elif isinstance(tree, BarDescriptor):
if tree.get("kwargs", {}).get("title_pos") in ["left", "right"]:
return 1
else:
return 2
###################
# Private Methods #
###################
def _calculate_values(self, tree, bar_d):
"""Calculate values for drawing bars of non-leafs in ``tree``
Recurses through ``tree``, replaces ``dict``s with
``(BarDescriptor, dict)`` so ``ProgressTree._draw`` can use
the ``BarDescriptor``s to draw the tree
"""
if all([
isinstance(tree, dict),
type(tree) != BarDescriptor
]):
# Calculate value and max_value
max_val = 0
value = 0
for k in tree:
# Get descriptor by recursing
bar_desc = self._calculate_values(tree[k], bar_d)
# Reassign to tuple of (new descriptor, tree below)
tree[k] = (bar_desc, tree[k])
value += bar_desc["value"].value
max_val += bar_desc.get("kwargs", {}).get("max_value", 100)
# Merge in values from ``bar_d`` before returning descriptor
kwargs = merge_dicts(
[bar_d.get("kwargs", {}),
dict(max_value=max_val)],
deepcopy=True
)
ret_d = merge_dicts(
[bar_d,
dict(value=Value(floor(value)), kwargs=kwargs)],
deepcopy=True
)
return BarDescriptor(ret_d)
elif isinstance(tree, BarDescriptor):
return tree
else:
raise TypeError("Unexpected type {}".format(type(tree)))
def _draw(self, tree, indent=0):
"""Recurse through ``tree`` and draw all nodes"""
if all([
isinstance(tree, dict),
type(tree) != BarDescriptor
]):
for k, v in sorted(tree.items()):
bar_desc, subdict = v[0], v[1]
args = [self.cursor.term] + bar_desc.get("args", [])
kwargs = dict(title_pos="above", indent=indent, title=k)
kwargs.update(bar_desc.get("kwargs", {}))
b = Bar(*args, **kwargs)
b.draw(value=bar_desc["value"].value, flush=False)
self._draw(subdict, indent=indent + self.indent)
def __init__(self, term=None, indent=4):
self.cursor = Cursor(term)
self.indent = indent
class ProgressTree(object):
"""Progress display for trees
For drawing a hierarchical progress view from a tree
:type term: NoneType|blessings.Terminal
:param term: Terminal instance; if not given, will be created by the class
:type indent: int
:param indent: The amount of indentation between each level in hierarchy
"""
def __init__(self, term=None, indent=4):
self.cursor = Cursor(term)
self.indent = indent
##################
# Public Methods #
##################
def draw(self, tree, bar_desc=None, save_cursor=True, flush=True):
"""Draw ``tree`` to the terminal
:type tree: dict
:param tree: ``tree`` should be a tree representing a hierarchy; each
key should be a string describing that hierarchy level and value
should also be ``dict`` except for leaves which should be
``BarDescriptors``. See ``BarDescriptor`` for a tree example.
:type bar_desc: BarDescriptor|NoneType
:param bar_desc: For describing non-leaf bars in that will be
drawn from ``tree``; certain attributes such as ``value``
and ``kwargs["max_value"]`` will of course be overridden
if provided.
:type flush: bool
:param flush: If this is set, output written will be flushed
:type save_cursor: bool
:param save_cursor: If this is set, cursor location will be saved before
drawing; this will OVERWRITE a previous save, so be sure to set
this accordingly (to your needs).
"""
if save_cursor:
self.cursor.save()
tree = deepcopy(tree)
# TODO: Automatically collapse hierarchy so something
# will always be displayable (well, unless the top-level)
# contains too many to display
lines_required = self.lines_required(tree)
ensure(
lines_required <= self.cursor.term.height, LengthOverflowError,
"Terminal is not long ({} rows) enough to fit all bars "
"({} rows).".format(self.cursor.term.height, lines_required))
bar_desc = BarDescriptor(type=Bar) if not bar_desc else bar_desc
self._calculate_values(tree, bar_desc)
self._draw(tree)
if flush:
self.cursor.flush()
def make_room(self, tree):
"""Clear lines in terminal below current cursor position as required
This is important to do before drawing to ensure sufficient
room at the bottom of your terminal.
:type tree: dict
:param tree: tree as described in ``BarDescriptor``
"""
lines_req = self.lines_required(tree)
self.cursor.clear_lines(lines_req)
def lines_required(self, tree, count=0):
"""Calculate number of lines required to draw ``tree``"""
if all([isinstance(tree, dict), type(tree) != BarDescriptor]):
return sum(
self.lines_required(v, count=count) for v in tree.values()) + 2
elif isinstance(tree, BarDescriptor):
if tree.get("kwargs", {}).get("title_pos") in ["left", "right"]:
return 1
else:
return 2
###################
# Private Methods #
###################
def _calculate_values(self, tree, bar_d):
"""Calculate values for drawing bars of non-leafs in ``tree``
Recurses through ``tree``, replaces ``dict``s with
``(BarDescriptor, dict)`` so ``ProgressTree._draw`` can use
the ``BarDescriptor``s to draw the tree
"""
if all([isinstance(tree, dict), type(tree) != BarDescriptor]):
# Calculate value and max_value
max_val = 0
value = 0
for k in tree:
# Get descriptor by recursing
bar_desc = self._calculate_values(tree[k], bar_d)
# Reassign to tuple of (new descriptor, tree below)
tree[k] = (bar_desc, tree[k])
value += bar_desc["value"].value
max_val += bar_desc.get("kwargs", {}).get("max_value", 100)
# Merge in values from ``bar_d`` before returning descriptor
kwargs = merge_dicts(
[bar_d.get("kwargs", {}),
dict(max_value=max_val)],
deepcopy=True)
ret_d = merge_dicts(
[bar_d, dict(value=Value(floor(value)), kwargs=kwargs)],
deepcopy=True)
return BarDescriptor(ret_d)
elif isinstance(tree, BarDescriptor):
return tree
else:
raise TypeError("Unexpected type {}".format(type(tree)))
def _draw(self, tree, indent=0):
"""Recurse through ``tree`` and draw all nodes"""
if all([isinstance(tree, dict), type(tree) != BarDescriptor]):
for k, v in sorted(tree.items()):
bar_desc, subdict = v[0], v[1]
args = [self.cursor.term] + bar_desc.get("args", [])
kwargs = dict(title_pos="above", indent=indent, title=k)
kwargs.update(bar_desc.get("kwargs", {}))
b = Bar(*args, **kwargs)
b.draw(value=bar_desc["value"].value, flush=False)
self._draw(subdict, indent=indent + self.indent)
