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author | Dave Cobbley <david.j.cobbley@linux.intel.com> | 2018-08-14 20:05:37 +0300 |
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committer | Brad Bishop <bradleyb@fuzziesquirrel.com> | 2018-08-23 04:26:31 +0300 |
commit | eb8dc40360f0cfef56fb6947cc817a547d6d9bc6 (patch) | |
tree | de291a73dc37168da6370e2cf16c347d1eba9df8 /poky/bitbake/lib/progressbar | |
parent | 9c3cf826d853102535ead04cebc2d6023eff3032 (diff) | |
download | openbmc-eb8dc40360f0cfef56fb6947cc817a547d6d9bc6.tar.xz |
[Subtree] Removing import-layers directory
As part of the move to subtrees, need to bring all the import layers
content to the top level.
Change-Id: I4a163d10898cbc6e11c27f776f60e1a470049d8f
Signed-off-by: Dave Cobbley <david.j.cobbley@linux.intel.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Diffstat (limited to 'poky/bitbake/lib/progressbar')
-rw-r--r-- | poky/bitbake/lib/progressbar/LICENSE.txt | 52 | ||||
-rw-r--r-- | poky/bitbake/lib/progressbar/__init__.py | 49 | ||||
-rw-r--r-- | poky/bitbake/lib/progressbar/compat.py | 44 | ||||
-rw-r--r-- | poky/bitbake/lib/progressbar/progressbar.py | 315 | ||||
-rw-r--r-- | poky/bitbake/lib/progressbar/widgets.py | 391 |
5 files changed, 851 insertions, 0 deletions
diff --git a/poky/bitbake/lib/progressbar/LICENSE.txt b/poky/bitbake/lib/progressbar/LICENSE.txt new file mode 100644 index 000000000..fc8ccdc1c --- /dev/null +++ b/poky/bitbake/lib/progressbar/LICENSE.txt @@ -0,0 +1,52 @@ +You can redistribute and/or modify this library under the terms of the +GNU LGPL license or BSD license (or both). + +--- + +progressbar - Text progress bar library for python. +Copyright (C) 2005 Nilton Volpato + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +--- + +progressbar - Text progress bar library for python +Copyright (c) 2008 Nilton Volpato + +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + a. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + b. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + c. Neither the name of the author nor the names of its contributors + may be used to endorse or promote products derived from this software + without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR +ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH +DAMAGE. diff --git a/poky/bitbake/lib/progressbar/__init__.py b/poky/bitbake/lib/progressbar/__init__.py new file mode 100644 index 000000000..fbab744ee --- /dev/null +++ b/poky/bitbake/lib/progressbar/__init__.py @@ -0,0 +1,49 @@ +#!/usr/bin/python +# -*- coding: utf-8 -*- +# +# progressbar - Text progress bar library for Python. +# Copyright (c) 2005 Nilton Volpato +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +"""Text progress bar library for Python. + +A text progress bar is typically used to display the progress of a long +running operation, providing a visual cue that processing is underway. + +The ProgressBar class manages the current progress, and the format of the line +is given by a number of widgets. A widget is an object that may display +differently depending on the state of the progress bar. There are three types +of widgets: + - a string, which always shows itself + + - a ProgressBarWidget, which may return a different value every time its + update method is called + + - a ProgressBarWidgetHFill, which is like ProgressBarWidget, except it + expands to fill the remaining width of the line. + +The progressbar module is very easy to use, yet very powerful. It will also +automatically enable features like auto-resizing when the system supports it. +""" + +__author__ = 'Nilton Volpato' +__author_email__ = 'first-name dot last-name @ gmail.com' +__date__ = '2011-05-14' +__version__ = '2.3' + +from .compat import * +from .widgets import * +from .progressbar import * diff --git a/poky/bitbake/lib/progressbar/compat.py b/poky/bitbake/lib/progressbar/compat.py new file mode 100644 index 000000000..a39f4a1f4 --- /dev/null +++ b/poky/bitbake/lib/progressbar/compat.py @@ -0,0 +1,44 @@ +# -*- coding: utf-8 -*- +# +# progressbar - Text progress bar library for Python. +# Copyright (c) 2005 Nilton Volpato +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +"""Compatibility methods and classes for the progressbar module.""" + + +# Python 3.x (and backports) use a modified iterator syntax +# This will allow 2.x to behave with 3.x iterators +try: + next +except NameError: + def next(iter): + try: + # Try new style iterators + return iter.__next__() + except AttributeError: + # Fallback in case of a "native" iterator + return iter.next() + + +# Python < 2.5 does not have "any" +try: + any +except NameError: + def any(iterator): + for item in iterator: + if item: return True + return False diff --git a/poky/bitbake/lib/progressbar/progressbar.py b/poky/bitbake/lib/progressbar/progressbar.py new file mode 100644 index 000000000..2873ad6ca --- /dev/null +++ b/poky/bitbake/lib/progressbar/progressbar.py @@ -0,0 +1,315 @@ +# -*- coding: utf-8 -*- +# +# progressbar - Text progress bar library for Python. +# Copyright (c) 2005 Nilton Volpato +# +# (With some small changes after importing into BitBake) +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +"""Main ProgressBar class.""" + +from __future__ import division + +import math +import os +import signal +import sys +import time + +try: + from fcntl import ioctl + from array import array + import termios +except ImportError: + pass + +from .compat import * # for: any, next +from . import widgets + + +class UnknownLength: pass + + +class ProgressBar(object): + """The ProgressBar class which updates and prints the bar. + + A common way of using it is like: + >>> pbar = ProgressBar().start() + >>> for i in range(100): + ... # do something + ... pbar.update(i+1) + ... + >>> pbar.finish() + + You can also use a ProgressBar as an iterator: + >>> progress = ProgressBar() + >>> for i in progress(some_iterable): + ... # do something + ... + + Since the progress bar is incredibly customizable you can specify + different widgets of any type in any order. You can even write your own + widgets! However, since there are already a good number of widgets you + should probably play around with them before moving on to create your own + widgets. + + The term_width parameter represents the current terminal width. If the + parameter is set to an integer then the progress bar will use that, + otherwise it will attempt to determine the terminal width falling back to + 80 columns if the width cannot be determined. + + When implementing a widget's update method you are passed a reference to + the current progress bar. As a result, you have access to the + ProgressBar's methods and attributes. Although there is nothing preventing + you from changing the ProgressBar you should treat it as read only. + + Useful methods and attributes include (Public API): + - currval: current progress (0 <= currval <= maxval) + - maxval: maximum (and final) value + - finished: True if the bar has finished (reached 100%) + - start_time: the time when start() method of ProgressBar was called + - seconds_elapsed: seconds elapsed since start_time and last call to + update + - percentage(): progress in percent [0..100] + """ + + __slots__ = ('currval', 'fd', 'finished', 'last_update_time', + 'left_justify', 'maxval', 'next_update', 'num_intervals', + 'poll', 'seconds_elapsed', 'signal_set', 'start_time', + 'term_width', 'update_interval', 'widgets', '_time_sensitive', + '__iterable') + + _DEFAULT_MAXVAL = 100 + _DEFAULT_TERMSIZE = 80 + _DEFAULT_WIDGETS = [widgets.Percentage(), ' ', widgets.Bar()] + + def __init__(self, maxval=None, widgets=None, term_width=None, poll=1, + left_justify=True, fd=sys.stderr): + """Initializes a progress bar with sane defaults.""" + + # Don't share a reference with any other progress bars + if widgets is None: + widgets = list(self._DEFAULT_WIDGETS) + + self.maxval = maxval + self.widgets = widgets + self.fd = fd + self.left_justify = left_justify + + self.signal_set = False + if term_width is not None: + self.term_width = term_width + else: + try: + self._handle_resize(None, None) + signal.signal(signal.SIGWINCH, self._handle_resize) + self.signal_set = True + except (SystemExit, KeyboardInterrupt): raise + except Exception as e: + print("DEBUG 5 %s" % e) + self.term_width = self._env_size() + + self.__iterable = None + self._update_widgets() + self.currval = 0 + self.finished = False + self.last_update_time = None + self.poll = poll + self.seconds_elapsed = 0 + self.start_time = None + self.update_interval = 1 + self.next_update = 0 + + + def __call__(self, iterable): + """Use a ProgressBar to iterate through an iterable.""" + + try: + self.maxval = len(iterable) + except: + if self.maxval is None: + self.maxval = UnknownLength + + self.__iterable = iter(iterable) + return self + + + def __iter__(self): + return self + + + def __next__(self): + try: + value = next(self.__iterable) + if self.start_time is None: + self.start() + else: + self.update(self.currval + 1) + return value + except StopIteration: + if self.start_time is None: + self.start() + self.finish() + raise + + + # Create an alias so that Python 2.x won't complain about not being + # an iterator. + next = __next__ + + + def _env_size(self): + """Tries to find the term_width from the environment.""" + + return int(os.environ.get('COLUMNS', self._DEFAULT_TERMSIZE)) - 1 + + + def _handle_resize(self, signum=None, frame=None): + """Tries to catch resize signals sent from the terminal.""" + + h, w = array('h', ioctl(self.fd, termios.TIOCGWINSZ, '\0' * 8))[:2] + self.term_width = w + + + def percentage(self): + """Returns the progress as a percentage.""" + if self.currval >= self.maxval: + return 100.0 + return (self.currval * 100.0 / self.maxval) if self.maxval else 100.00 + + percent = property(percentage) + + + def _format_widgets(self): + result = [] + expanding = [] + width = self.term_width + + for index, widget in enumerate(self.widgets): + if isinstance(widget, widgets.WidgetHFill): + result.append(widget) + expanding.insert(0, index) + else: + widget = widgets.format_updatable(widget, self) + result.append(widget) + width -= len(widget) + + count = len(expanding) + while count: + portion = max(int(math.ceil(width * 1. / count)), 0) + index = expanding.pop() + count -= 1 + + widget = result[index].update(self, portion) + width -= len(widget) + result[index] = widget + + return result + + + def _format_line(self): + """Joins the widgets and justifies the line.""" + + widgets = ''.join(self._format_widgets()) + + if self.left_justify: return widgets.ljust(self.term_width) + else: return widgets.rjust(self.term_width) + + + def _need_update(self): + """Returns whether the ProgressBar should redraw the line.""" + if self.currval >= self.next_update or self.finished: return True + + delta = time.time() - self.last_update_time + return self._time_sensitive and delta > self.poll + + + def _update_widgets(self): + """Checks all widgets for the time sensitive bit.""" + + self._time_sensitive = any(getattr(w, 'TIME_SENSITIVE', False) + for w in self.widgets) + + + def update(self, value=None): + """Updates the ProgressBar to a new value.""" + + if value is not None and value is not UnknownLength: + if (self.maxval is not UnknownLength + and not 0 <= value <= self.maxval): + + raise ValueError('Value out of range') + + self.currval = value + + + if not self._need_update(): return + if self.start_time is None: + raise RuntimeError('You must call "start" before calling "update"') + + now = time.time() + self.seconds_elapsed = now - self.start_time + self.next_update = self.currval + self.update_interval + output = self._format_line() + self.fd.write(output + '\r') + self.fd.flush() + self.last_update_time = now + return output + + + def start(self, update=True): + """Starts measuring time, and prints the bar at 0%. + + It returns self so you can use it like this: + >>> pbar = ProgressBar().start() + >>> for i in range(100): + ... # do something + ... pbar.update(i+1) + ... + >>> pbar.finish() + """ + + if self.maxval is None: + self.maxval = self._DEFAULT_MAXVAL + + self.num_intervals = max(100, self.term_width) + self.next_update = 0 + + if self.maxval is not UnknownLength: + if self.maxval < 0: raise ValueError('Value out of range') + self.update_interval = self.maxval / self.num_intervals + + + self.start_time = time.time() + if update: + self.last_update_time = self.start_time + self.update(0) + else: + self.last_update_time = 0 + + return self + + + def finish(self): + """Puts the ProgressBar bar in the finished state.""" + + if self.finished: + return + self.finished = True + self.update(self.maxval) + self.fd.write('\n') + if self.signal_set: + signal.signal(signal.SIGWINCH, signal.SIG_DFL) diff --git a/poky/bitbake/lib/progressbar/widgets.py b/poky/bitbake/lib/progressbar/widgets.py new file mode 100644 index 000000000..77285ca7a --- /dev/null +++ b/poky/bitbake/lib/progressbar/widgets.py @@ -0,0 +1,391 @@ +# -*- coding: utf-8 -*- +# +# progressbar - Text progress bar library for Python. +# Copyright (c) 2005 Nilton Volpato +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +"""Default ProgressBar widgets.""" + +from __future__ import division + +import datetime +import math + +try: + from abc import ABCMeta, abstractmethod +except ImportError: + AbstractWidget = object + abstractmethod = lambda fn: fn +else: + AbstractWidget = ABCMeta('AbstractWidget', (object,), {}) + + +def format_updatable(updatable, pbar): + if hasattr(updatable, 'update'): return updatable.update(pbar) + else: return updatable + + +class Widget(AbstractWidget): + """The base class for all widgets. + + The ProgressBar will call the widget's update value when the widget should + be updated. The widget's size may change between calls, but the widget may + display incorrectly if the size changes drastically and repeatedly. + + The boolean TIME_SENSITIVE informs the ProgressBar that it should be + updated more often because it is time sensitive. + """ + + TIME_SENSITIVE = False + __slots__ = () + + @abstractmethod + def update(self, pbar): + """Updates the widget. + + pbar - a reference to the calling ProgressBar + """ + + +class WidgetHFill(Widget): + """The base class for all variable width widgets. + + This widget is much like the \\hfill command in TeX, it will expand to + fill the line. You can use more than one in the same line, and they will + all have the same width, and together will fill the line. + """ + + @abstractmethod + def update(self, pbar, width): + """Updates the widget providing the total width the widget must fill. + + pbar - a reference to the calling ProgressBar + width - The total width the widget must fill + """ + + +class Timer(Widget): + """Widget which displays the elapsed seconds.""" + + __slots__ = ('format_string',) + TIME_SENSITIVE = True + + def __init__(self, format='Elapsed Time: %s'): + self.format_string = format + + @staticmethod + def format_time(seconds): + """Formats time as the string "HH:MM:SS".""" + + return str(datetime.timedelta(seconds=int(seconds))) + + + def update(self, pbar): + """Updates the widget to show the elapsed time.""" + + return self.format_string % self.format_time(pbar.seconds_elapsed) + + +class ETA(Timer): + """Widget which attempts to estimate the time of arrival.""" + + TIME_SENSITIVE = True + + def update(self, pbar): + """Updates the widget to show the ETA or total time when finished.""" + + if pbar.currval == 0: + return 'ETA: --:--:--' + elif pbar.finished: + return 'Time: %s' % self.format_time(pbar.seconds_elapsed) + else: + elapsed = pbar.seconds_elapsed + eta = elapsed * pbar.maxval / pbar.currval - elapsed + return 'ETA: %s' % self.format_time(eta) + + +class AdaptiveETA(Timer): + """Widget which attempts to estimate the time of arrival. + + Uses a weighted average of two estimates: + 1) ETA based on the total progress and time elapsed so far + 2) ETA based on the progress as per the last 10 update reports + + The weight depends on the current progress so that to begin with the + total progress is used and at the end only the most recent progress is + used. + """ + + TIME_SENSITIVE = True + NUM_SAMPLES = 10 + + def _update_samples(self, currval, elapsed): + sample = (currval, elapsed) + if not hasattr(self, 'samples'): + self.samples = [sample] * (self.NUM_SAMPLES + 1) + else: + self.samples.append(sample) + return self.samples.pop(0) + + def _eta(self, maxval, currval, elapsed): + return elapsed * maxval / float(currval) - elapsed + + def update(self, pbar): + """Updates the widget to show the ETA or total time when finished.""" + if pbar.currval == 0: + return 'ETA: --:--:--' + elif pbar.finished: + return 'Time: %s' % self.format_time(pbar.seconds_elapsed) + else: + elapsed = pbar.seconds_elapsed + currval1, elapsed1 = self._update_samples(pbar.currval, elapsed) + eta = self._eta(pbar.maxval, pbar.currval, elapsed) + if pbar.currval > currval1: + etasamp = self._eta(pbar.maxval - currval1, + pbar.currval - currval1, + elapsed - elapsed1) + weight = (pbar.currval / float(pbar.maxval)) ** 0.5 + eta = (1 - weight) * eta + weight * etasamp + return 'ETA: %s' % self.format_time(eta) + + +class FileTransferSpeed(Widget): + """Widget for showing the transfer speed (useful for file transfers).""" + + FORMAT = '%6.2f %s%s/s' + PREFIXES = ' kMGTPEZY' + __slots__ = ('unit',) + + def __init__(self, unit='B'): + self.unit = unit + + def update(self, pbar): + """Updates the widget with the current SI prefixed speed.""" + + if pbar.seconds_elapsed < 2e-6 or pbar.currval < 2e-6: # =~ 0 + scaled = power = 0 + else: + speed = pbar.currval / pbar.seconds_elapsed + power = int(math.log(speed, 1000)) + scaled = speed / 1000.**power + + return self.FORMAT % (scaled, self.PREFIXES[power], self.unit) + + +class AnimatedMarker(Widget): + """An animated marker for the progress bar which defaults to appear as if + it were rotating. + """ + + __slots__ = ('markers', 'curmark') + + def __init__(self, markers='|/-\\'): + self.markers = markers + self.curmark = -1 + + def update(self, pbar): + """Updates the widget to show the next marker or the first marker when + finished""" + + if pbar.finished: return self.markers[0] + + self.curmark = (self.curmark + 1) % len(self.markers) + return self.markers[self.curmark] + +# Alias for backwards compatibility +RotatingMarker = AnimatedMarker + + +class Counter(Widget): + """Displays the current count.""" + + __slots__ = ('format_string',) + + def __init__(self, format='%d'): + self.format_string = format + + def update(self, pbar): + return self.format_string % pbar.currval + + +class Percentage(Widget): + """Displays the current percentage as a number with a percent sign.""" + + def update(self, pbar): + return '%3d%%' % pbar.percentage() + + +class FormatLabel(Timer): + """Displays a formatted label.""" + + mapping = { + 'elapsed': ('seconds_elapsed', Timer.format_time), + 'finished': ('finished', None), + 'last_update': ('last_update_time', None), + 'max': ('maxval', None), + 'seconds': ('seconds_elapsed', None), + 'start': ('start_time', None), + 'value': ('currval', None) + } + + __slots__ = ('format_string',) + def __init__(self, format): + self.format_string = format + + def update(self, pbar): + context = {} + for name, (key, transform) in self.mapping.items(): + try: + value = getattr(pbar, key) + + if transform is None: + context[name] = value + else: + context[name] = transform(value) + except: pass + + return self.format_string % context + + +class SimpleProgress(Widget): + """Returns progress as a count of the total (e.g.: "5 of 47").""" + + __slots__ = ('sep',) + + def __init__(self, sep=' of '): + self.sep = sep + + def update(self, pbar): + return '%d%s%d' % (pbar.currval, self.sep, pbar.maxval) + + +class Bar(WidgetHFill): + """A progress bar which stretches to fill the line.""" + + __slots__ = ('marker', 'left', 'right', 'fill', 'fill_left') + + def __init__(self, marker='#', left='|', right='|', fill=' ', + fill_left=True): + """Creates a customizable progress bar. + + marker - string or updatable object to use as a marker + left - string or updatable object to use as a left border + right - string or updatable object to use as a right border + fill - character to use for the empty part of the progress bar + fill_left - whether to fill from the left or the right + """ + self.marker = marker + self.left = left + self.right = right + self.fill = fill + self.fill_left = fill_left + + + def update(self, pbar, width): + """Updates the progress bar and its subcomponents.""" + + left, marked, right = (format_updatable(i, pbar) for i in + (self.left, self.marker, self.right)) + + width -= len(left) + len(right) + # Marked must *always* have length of 1 + if pbar.maxval: + marked *= int(pbar.currval / pbar.maxval * width) + else: + marked = '' + + if self.fill_left: + return '%s%s%s' % (left, marked.ljust(width, self.fill), right) + else: + return '%s%s%s' % (left, marked.rjust(width, self.fill), right) + + +class ReverseBar(Bar): + """A bar which has a marker which bounces from side to side.""" + + def __init__(self, marker='#', left='|', right='|', fill=' ', + fill_left=False): + """Creates a customizable progress bar. + + marker - string or updatable object to use as a marker + left - string or updatable object to use as a left border + right - string or updatable object to use as a right border + fill - character to use for the empty part of the progress bar + fill_left - whether to fill from the left or the right + """ + self.marker = marker + self.left = left + self.right = right + self.fill = fill + self.fill_left = fill_left + + +class BouncingBar(Bar): + def update(self, pbar, width): + """Updates the progress bar and its subcomponents.""" + + left, marker, right = (format_updatable(i, pbar) for i in + (self.left, self.marker, self.right)) + + width -= len(left) + len(right) + + if pbar.finished: return '%s%s%s' % (left, width * marker, right) + + position = int(pbar.currval % (width * 2 - 1)) + if position > width: position = width * 2 - position + lpad = self.fill * (position - 1) + rpad = self.fill * (width - len(marker) - len(lpad)) + + # Swap if we want to bounce the other way + if not self.fill_left: rpad, lpad = lpad, rpad + + return '%s%s%s%s%s' % (left, lpad, marker, rpad, right) + + +class BouncingSlider(Bar): + """ + A slider that bounces back and forth in response to update() calls + without reference to the actual value. Based on a combination of + BouncingBar from a newer version of this module and RotatingMarker. + """ + def __init__(self, marker='<=>'): + self.curmark = -1 + self.forward = True + Bar.__init__(self, marker=marker) + def update(self, pbar, width): + left, marker, right = (format_updatable(i, pbar) for i in + (self.left, self.marker, self.right)) + + width -= len(left) + len(right) + if width < 0: + return '' + + if pbar.finished: return '%s%s%s' % (left, width * '=', right) + + self.curmark = self.curmark + 1 + position = int(self.curmark % (width * 2 - 1)) + if position + len(marker) > width: + self.forward = not self.forward + self.curmark = 1 + position = 1 + lpad = ' ' * (position - 1) + rpad = ' ' * (width - len(marker) - len(lpad)) + + if not self.forward: + temp = lpad + lpad = rpad + rpad = temp + return '%s%s%s%s%s' % (left, lpad, marker, rpad, right) |