| # Copyright 2005-2012 Gentoo Foundation |
| # Distributed under the terms of the GNU General Public License v2 |
| |
| import time |
| import signal |
| |
| import portage |
| |
| |
| class ProgressHandler(object): |
| def __init__(self): |
| self.reset() |
| |
| def reset(self): |
| self.curval = 0 |
| self.maxval = 0 |
| self.last_update = 0 |
| self.min_display_latency = 0.2 |
| |
| def onProgress(self, maxval, curval): |
| self.maxval = maxval |
| self.curval = curval |
| cur_time = time.time() |
| if cur_time - self.last_update >= self.min_display_latency: |
| self.last_update = cur_time |
| self.display() |
| |
| def display(self): |
| raise NotImplementedError(self) |
| |
| |
| class ProgressBar(ProgressHandler): |
| """Class to set up and return a Progress Bar""" |
| |
| def __init__(self, isatty, **kwargs): |
| self.isatty = isatty |
| self.kwargs = kwargs |
| ProgressHandler.__init__(self) |
| self.progressBar = None |
| |
| def start(self): |
| if self.isatty: |
| self.progressBar = portage.output.TermProgressBar(**self.kwargs) |
| signal.signal(signal.SIGWINCH, self.sigwinch_handler) |
| else: |
| self.onProgress = None |
| return self.onProgress |
| |
| def set_label(self, _label): |
| self.kwargs['label'] = _label |
| |
| def display(self): |
| self.progressBar.set(self.curval, self.maxval) |
| |
| def sigwinch_handler(self, signum, frame): |
| lines, self.progressBar.term_columns = \ |
| portage.output.get_term_size() |
| |
| def stop(self): |
| signal.signal(signal.SIGWINCH, signal.SIG_DFL) |
| |
