708 lines
18 KiB
Python
708 lines
18 KiB
Python
#! /usr/bin/env python3
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# encoding: utf-8
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import math
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import re
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import sys
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import struct
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import fcntl
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import termios
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import time
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# --------------------------------------------------
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def lexical_join(words, oxford=False):
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'''
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Joins an iterable of words or sentence fragments into a lexical list:
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>>> lexical_join(['this', 'that', 'one of them too'])
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'this, that and one of them too'
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>>> lexical_join(['this', 'that', 'one of them too'], oxford=True)
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'this, that, and one of them too'
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>>> lexical_join(['this', 'that'])
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'this and that'
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>>> lexical_join(['this'])
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'this'
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'''
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l = len(words)
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if l == 0:
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return ''
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elif l == 1:
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return words[0]
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elif l == 2:
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return '%s and %s' %(str(words[0]), str(words[1]))
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else:
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return '%s%s and %s' %(', '.join(str(w) for w in words[:-1]), ',' if oxford else '', str(words[-1]))
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# --------------------------------------------------
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class _ProgressBarChannel:
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def __init__(self, unit, top, precision, use_prefixes=True, prefix_base2=False, min_width_raw=0, min_width_rate=0, min_width_time=0, min_width_percent=7):
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self.unit = unit
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self.top = top
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self.dynamic_top = top is None
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self.prefix_base2 = prefix_base2
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self.precision = precision
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self.use_prefixes = use_prefixes
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self.min_width = {
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"raw": min_width_raw,
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"rate": min_width_rate,
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"percent": min_width_percent,
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"time": min_width_time
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}
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self._value = 0
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self.set()
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if prefix_base2:
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_print("Unit does not yet support base2 prefixes (e.g. Gi, Mi), using decadic (G, M) instead", prefix.warn)
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def set(self, value=None):
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if value is not None:
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self._value = value
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self.ratio = self._value / self.top if self.top else None
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def _render(self, value, unit=None, just=None):
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if unit is None:
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unit = self.unit
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u = Unit(value, unit, format="%.{:d}f pU".format(self.precision))
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if not self.use_prefixes or just == "percent":
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u._prefixes = (('', 0),) # Unit needs fixin'
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s = str(u)
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if just:
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s = s.rjust(self.min_width[just])
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return s
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@property
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def value(self):
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return self._render(self._value, just="raw")
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@property
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def inverse(self):
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return self._render(self.top - self._value, just="raw")
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def divide(self, amount):
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"""
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Divides the amount into amount * ratio, amount * (1 - ratio) and rounds to integers.
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"""
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A = round(amount * self.ratio)
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return (A, amount - A)
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class ProgressBar2:
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"""
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A configurable text progressbar.
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Each atom consists of three characters: a literal §, an operator and a channel.
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An operator is one of:
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% - a percentage (value from 0 to 100, padded with spaces to three characters)
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r - displays the raw value of the channel
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z - displays the maximum (total) value
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s - displays the rate of change in units/s
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m - displays the rate of change in units/min
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h - displays the rate of change in units/h
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t - displays the elapsed time in s (use with uppercase channel to get an ETA)
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T - displays the elapsed time in hh:mm:ss (use with uppercase channel to get an ETA)
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any other character - a bar consisting of these characters filling the line so that
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at 100% it fills the entirety of the remaining space
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A channel ID as a lowercase letter is the channel's actual value. An uppercase letter
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is that channel's complement. Operations z, s, m and h cannot have a complement.
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Use §§ to display a literal §.
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Examples
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========
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Format: §%a [§=a>§ A] §tA
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Output: 42 % [============> ] 27 s
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Format: §%a (§ra/§ma) [§-a>§ A] §sa [§rb/§rB] (ETA §tA)
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Output: 53 % (21.0/39.6 kf) [---------------------> ] 27.1 f/s [233/439 Mio] (ETA 00:11:26)
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"""
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def __init__(self, format, channels, width=None):
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"""
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Initialize the ProgressBar.
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width is the desired size of the progressbar drawing area in characters (columns)
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and defaults to terminal width.
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space_before_unit enables a space character between a value and its unit.
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channels is a dict that for each channel lists its properties:
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{
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"a": {
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"unit": "f",
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"prefix_base2": False,
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"top": 39600,
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"precision": 1
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},
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"b": {
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"unit": "o",
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"prefix_base2": True,
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"top": measure_file_size_closure("/path/to/file"),
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"precision": 0
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}
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}
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Channel IDs (the "a", "b") are arbitrary lowercase letters ([a-z]).
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Properties "unit" and "prefix_base2" are passed to over.core.text.Unit.
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"top" is the value of the channel that corresponds to 100%. Channels are
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allowed to exceed this value. It can either be a number or a callable. If
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it's a callable, it will be called without arguments and shall return a number.
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"precision" is the displayed floating point precision. Use 0 to force an integer.
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"""
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self.format = format
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self.channels = {id: _ProgressBarChannel(**conf) for id, conf in channels.items()}
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self.time_start = None
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self.width = width
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def set(self, channel_id, value):
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"""
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Sets the channel's value.
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"""
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c = self.channels[channel_id]
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c.set(value)
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if c.ratio is not None:
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for channel in self.channels.values():
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if channel.dynamic_top:
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channel.top = channel._value / c.ratio
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def render(self, clear=True, stream=sys.stderr):
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"""
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Renders the progressbar into a stream. If clear is True, clears the previous content first.
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"""
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width = self.width or get_terminal_size()[1]
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raw = self.format
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t = time.time()
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if not self.time_start:
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self.time_start = t
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for tag in re.findall("§[%rzsmhtT][a-zA-Z]", raw):
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op = tag[1]
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ch = tag[2]
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channel = self.channels[ch.lower()]
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inverse = ch.isupper()
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if op == "%":
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ratio = 1 - channel.ratio if inverse else channel.ratio
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raw = raw.replace(tag, channel._render(ratio * 100, "%", "percent"), 1)
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elif op == "r": # display the current value
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raw = raw.replace(tag, channel.inverse if inverse else channel.value, 1)
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elif op == "z": # display the top value
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if inverse:
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raise ValueError("inverse of the top value is not defined: {:s}".format(tag))
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if channel.top:
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s = channel._render(channel.top, just="raw")
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else:
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s = "- {:s}".format(channel.unit).rjust(channel.min_width["raw"])
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raw = raw.replace(tag, s, 1)
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elif op.lower() == "t":
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t_elapsed = t - self.time_start
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t_to_end = (t_elapsed * (channel.top - channel._value) / channel._value) if channel._value > 0 else None
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raw = raw.replace(tag, self._render_time(t_to_end if inverse else t_elapsed, op.isupper(), channel.min_width["time"]), 1)
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elif op in "smh":
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if inverse:
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raise ValueError("the inverse of rates is not defined: {:s}".format(tag))
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t_elapsed = t - self.time_start
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if op == "s":
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t_unit = "s"
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t_div = 1
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elif op == "m":
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t_unit = "min"
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t_div = 60
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elif op == "h":
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t_unit = "h"
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t_div = 3600
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if t_elapsed > 0:
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rate = t_div * channel._value / t_elapsed
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s = channel._render(rate, channel.unit + "/" + t_unit, "rate")
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else:
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s = "- {:s}/{:s}".format(channel.unit, t_unit).rjust(channel.min_width["rate"])
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raw = raw.replace(tag, s, 1)
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# all that remains are bars
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free_space = width - len(re.sub("§[^%rzsmhtT][a-zA-Z]", "", raw))
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for tag in re.findall("§[^%rzsmhtT][a-zA-Z]", raw):
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op = tag[1]
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ch = tag[2]
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channel = self.channels[ch.lower()]
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lengths = channel.divide(free_space)
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raw = raw.replace(tag, op * lengths[1 if ch.isupper() else 0], 1)
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# render literal §s
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raw = raw.replace("§§", "§")
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# pave over previous render and draw the new one
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if clear:
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stream.write("\r" + " " * width)
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stream.write("\r" + raw)
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def end(self, finish=False):
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"""
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Print a newline (heh :-)
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If finish is True, set all channels to 100% and draw the progressbar first.
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"""
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if finish:
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for c in self.channels.values():
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c.set(c.top)
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self.render()
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print()
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def _render_time(self, seconds, hhmmss=False, just=0):
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if hhmmss:
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if seconds is None:
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output = "--:--:--"
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else:
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mm, ss = divmod(int(seconds), 60)
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hh, mm = divmod(mm, 60)
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output = "{:02d}:{:02d}:{:02d}".format(hh, mm, ss)
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else:
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output = "- s" if seconds is None else "{:d} s".format(int(seconds))
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return output.rjust(just)
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class ProgressBar:
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'''
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An animated progress bar.
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TODO derive Wait() from this
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'''
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def __init__(self, width, top, unit, reverse=False):
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'''
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width width of the 'widget' including all text
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top the 100% value
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unit name of the unit to display
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reverse True to expand the progress bar from right to left
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'''
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self.width = width
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self.value = 0
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self.top = top
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self.unit = unit
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self.reverse = reverse
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self.old_len = 0
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self.t_start = None
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_print("over.core.text.ProgressBar is deprecated and will be replaced by ProgressBar2 soon", prefix.warn)
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def draw(self):
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if not self.t_start:
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self.t_start = time.time()
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if self.old_len:
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sys.stderr.write('\b' * self.old_len)
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transferred = str(Unit(self.value, self.unit))
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dt = time.time() - self.t_start
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if dt > 0:
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speed = self.value / dt
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else:
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speed = 0.0
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speed = str(Unit(speed, '%s/s' %(self.unit)))
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available_width = self.width - len(transferred) - len(speed) - 5
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ratio = self.value / self.top
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pb_done = '=' * int(available_width * ratio)
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pb_rem = ' ' * int(available_width * (1 - ratio))
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symbol = '>'
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if self.reverse:
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symbol = '<'
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pb_done, pb_rem = pb_rem, pb_done
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text = '%s [%s%s%s] %s' %(transferred, pb_done, symbol, pb_rem, speed)
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sys.stderr.write(text)
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current_len = len(text)
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tail = self.old_len - current_len
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self.old_len = current_len
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if tail > 0:
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sys.stderr.write(' ' * tail)
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sys.stderr.write('\b' * tail)
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sys.stderr.flush()
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def update(self, value):
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self.value = value
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self.draw()
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def blank(self):
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sys.stderr.write('\r' + self.old_len * ' ' + '\r')
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sys.stderr.flush()
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# --------------------------------------------------
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class Unit:
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'''
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A object that represents numbers and units in human-readable form.
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TODO use significant digits instead of rigid order boundaries
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TODO float superclass?
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TODO base_2 prefixes (Ki, Mi, ...)
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'''
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_prefixes = (
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('Y', 24), ('Z', 21), ('E', 18), ('P', 15), ('T', 12), ('G', 9), ('M', 6), ('k', 3),
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('h', 2), ('D', 1), ('', 0), ('d', -1), ('c', -2), ('m', -3), ('μ', -6), ('n', -9),
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('p', -12), ('f', -15), ('a', -18), ('z', -21), ('y', -24)
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)
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def __init__(self,
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value, unit=None, dimension=1,
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use_prefixes='YZEPTGMkmμnpfazy', format='%.2f pU',
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logarithmic=False, log_base=10
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):
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'''
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value the numerical value of the variable (int or float)
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unit the symbol to use, if any (str or None)
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dimension the dimensionality of the value (1, 2, 3, ...)
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use_prefixes which multiplier prefixes to use
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- the default 'YZEPTGMkmμnpfazy' omits 'c' for centi- and 'D' for deca-
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format use printf notation for value (e.g. %010.5f), p for prefix and U for unit
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logarithmic when True, log_10 prefixes are used
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log_base logarithm base value
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note that deca- is correctly rendered as 'da', the 'D' is used in use_prefixes only
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'''
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self.value = float(value)
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self.unit = unit if unit else ''
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self.dimension = dimension
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self.use_prefixes = use_prefixes
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self.format = format
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self.logarithmic = logarithmic
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self.log_base = log_base
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if self.logarithmic and (self.value < 0 or self.log_base < 0):
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raise ValueError('math domain error (negative values can\'t be represented in dB)')
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def __str__(self):
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if self.value == 0.0:
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e = 0
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else:
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e = round(math.log(abs(self.value), 10), 6)
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if self.logarithmic:
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prefix = 'dB'
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value = math.log(self.value, self.log_base) * 10
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else:
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for prefix, mul in self._prefixes:
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if prefix in self.use_prefixes and mul*self.dimension <= e:
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break
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value = self.value / 10**(mul*self.dimension)
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output = self.format %(value)
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output = output.replace('p', prefix if prefix != 'D' else 'da') # deca- handler
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output = output.replace('U', self.unit)
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return output
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def __repr__(self):
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return 'over.core.text.Unit(%s)' %(self)
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# --------------------------------------------------
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def paragraph(text, width=0, indent=0, prefix=None, stamp=None):
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'''
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str text text to format
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int width required line length; if 0, current terminal width will be used;
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- if negative, current terminal width minus supplied amount will be used
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int indent how many spaces to indent the text with
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str prefix prefix each line with it; not counted in width (offsets the lines)
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str stamp placed over the first line's indent (stretching the indent if necessary)
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Formats text into an indented paragraph that fits the terminal and returns it.
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Correctly handles color tags.
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'''
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#words = [x.strip() for x in text.split() if x.strip()]
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words = text.split()
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term_width = get_terminal_size()[1]
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if not width:
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width = term_width
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elif width < 0:
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width += term_width
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lines = [] # individual lines go in this buffer
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first = True
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while words:
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if indent:
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if first and stamp:
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lines.append([stamp + ' '*(indent-1-len(stamp))])
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else:
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lines.append([' '*(indent-1)]) # first word = indent minus one space (that's gonna get back while joining)
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first = False
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else:
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lines.append([])
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while words:
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word_added = False
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if len(re.sub('§.', '', ' '.join(lines[-1]))) + len(re.sub('§.', '', words[0])) + 1 <= width:
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lines[-1].append(words.pop(0))
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word_added = True
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elif not word_added and len(lines[-1]) == 1 and indent:
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# no word added and just the indent's in here = word's too long -> screw indent
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# we might try to keep at least a part of the indent - if possible
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len_word = len(re.sub('§.', '', words[0]))
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if len_word < width:
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lines[-1] = [' '*(width - len_word - 1), words.pop(0)]
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else:
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lines[-1] = [words.pop(0)]
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word_added = True
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break
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elif not word_added and not lines[-1] and not indent:
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# no word added, empty line = word's too long -> screw indent
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lines[-1] = [words.pop(0)]
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word_added = True
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break
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else:
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break
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lines_tmp = []
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for line in lines:
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if prefix:
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line.insert(0, prefix)
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lines_tmp.append(' '.join(line)) # put words together
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return '\n'.join(lines_tmp) # put lines together
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class prefix:
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info = (' ', 'INFO')
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debug = (' §b?§/', '§bDEBG§/')
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start = ('§B>>>§/', '§BEXEC§/')
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exec = start
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warn = (' §y#§/', '§yWARN§/')
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fail = ('§r!!!§/', '§rFAIL§/')
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done = (' §g*§/', '§gDONE§/')
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colortags = {
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'§r': '\x1b[31;01m',
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'§g': '\x1b[32;01m',
|
|
'§y': '\x1b[33;01m',
|
|
'§b': '\x1b[34;01m',
|
|
'§m': '\x1b[35;01m',
|
|
'§c': '\x1b[36;01m',
|
|
'§B': '\x1b[01m',
|
|
'§/': '\x1b[39;49;00m'
|
|
}
|
|
|
|
def render(text, colors=True):
|
|
'''
|
|
Processes text with color tags and either
|
|
removes them (with colors=False) or replaces
|
|
them with terminal color codes.
|
|
'''
|
|
|
|
text = str(text)
|
|
|
|
if colors:
|
|
tags = re.findall('§[^§]', text)
|
|
|
|
for tag in tags:
|
|
try:
|
|
text = text.replace(tag, colortags[tag])
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
text = re.sub('§[^§]', '', text)
|
|
|
|
# unescape actual paragraphs
|
|
text = re.sub('§§', '§', text)
|
|
|
|
return text
|
|
|
|
# --------------------------------------------------
|
|
|
|
def char_length(string):
|
|
'''
|
|
Returns the length of a string minus all formatting tags.
|
|
'''
|
|
|
|
plain_string = render(string, colors=False)
|
|
|
|
return len(plain_string)
|
|
|
|
# --------------------------------------------------
|
|
|
|
class Output:
|
|
'''
|
|
Text UI output renderer.
|
|
|
|
Prints messages to the stdout with optional eye candy
|
|
like colors and timestamps.
|
|
|
|
Usage:
|
|
>>> from over import Output, prefix
|
|
>>> say = Output('test', timestamp=True)
|
|
>>> say('system initialized')
|
|
[2013-02-28 16:41:28] INFO -- test, system initialized
|
|
>>> say('system is FUBAR', prefix.fail)
|
|
[2013-02-28 16:41:46] FAIL -- test, system is FUBAR
|
|
>>> say('I just realized this will not work', prefix.fail, timestamp=False)
|
|
!!! I just realized this will not work
|
|
|
|
TODO use a generic format string
|
|
'''
|
|
|
|
def __init__(self, name, timestamp=True, colors=True, default_prefix=prefix.info, default_suffix='.\n', stream=sys.stderr):
|
|
self.name = name
|
|
self.timestamp = timestamp
|
|
self.colors = colors
|
|
self.default_prefix = default_prefix
|
|
self.default_suffix = default_suffix
|
|
self.stream = stream
|
|
|
|
def __call__(self, text, prefix=None, suffix=None, indent=0, timestamp=None, colors=None, display_name=True):
|
|
if prefix is None:
|
|
prefix = self.default_prefix
|
|
|
|
if type(prefix) is str:
|
|
prefix = (prefix, prefix)
|
|
|
|
if suffix is None:
|
|
suffix = self.default_suffix
|
|
|
|
if timestamp is None:
|
|
timestamp = self.timestamp
|
|
|
|
if colors is None:
|
|
colors = self.colors
|
|
|
|
output = []
|
|
|
|
# [2012-11-11 16:52:06] INFO -- ahoj
|
|
if timestamp:
|
|
output.append(time.strftime('[%Y-%m-%d %H:%M:%S] '))
|
|
output.append(prefix[1])
|
|
output.append(' -- ')
|
|
elif prefix:
|
|
output.append(prefix[0])
|
|
output.append(' ')
|
|
|
|
if display_name and self.name:
|
|
output.append('%s, ' %(self.name))
|
|
|
|
#output.append(paragraph(str(text), indent=indent))
|
|
output.append(str(text))
|
|
|
|
if suffix:
|
|
output.append(suffix)
|
|
|
|
output = ''.join(output)
|
|
|
|
self.stream.write(render(output, colors))
|
|
self.stream.flush()
|
|
|
|
# --------------------------------------------------
|
|
|
|
def get_terminal_size():
|
|
'''
|
|
Returns current terminal's (rows, cols).
|
|
'''
|
|
|
|
terminal = sys.stdout.fileno()
|
|
try:
|
|
return struct.unpack('HHHH', fcntl.ioctl(terminal, termios.TIOCGWINSZ, struct.pack('HHHH', 0, 0, 0, 0)))
|
|
except IOError:
|
|
return (40, 80)
|
|
|
|
# --------------------------------------------------
|
|
|
|
_print = Output('over.core.text', stream=sys.stderr)
|
|
|
|
# --------------------------------------------------
|
|
|
|
if __name__ == "__main__":
|
|
pb = ProgressBar2(
|
|
"§%a (§ra/§za) [§=a>§ A] §sa [§rb/§zb] (ETA §TA)",
|
|
{
|
|
"a": {
|
|
"unit": "f",
|
|
"prefix_base2": False,
|
|
"top": 39600,
|
|
"precision": 1,
|
|
"min_width_raw": 10,
|
|
"min_width_rate": 10,
|
|
# "min_width_percent": 7, # 7 is already the default
|
|
"min_width_time": 0
|
|
},
|
|
"b": {
|
|
"unit": "o",
|
|
"prefix_base2": True,
|
|
"top": 3200,
|
|
"precision": 0,
|
|
"min_width_raw": 10,
|
|
"min_width_rate": 10,
|
|
"min_width_time": 10
|
|
}
|
|
}
|
|
)
|
|
|
|
ratios = [0, 0.1, 0.25, 0.4, 0.6, 0.8, 0.95, 1.0]
|
|
|
|
for ratio in ratios:
|
|
pb.set("a", ratio * pb.channels["a"].top)
|
|
pb.set("b", ratio * pb.channels["b"].top)
|
|
pb.render()
|
|
time.sleep(0.25)
|
|
|
|
pb.end(not True)
|