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class DummyProgress:
def __init__(self, callback, message):
self.callback = callback
self.message = message
def init(self, total):
pass
def update(self, value):
pass
def finish(self):
self.callback(self.message + "\n")
class PercentProgress(DummyProgress):
def __init__(self, *args):
DummyProgress.__init__(self, *args)
self.progress_shown = False
def _erase(self, n):
if not self.progress_shown:
self.last_length = n
self.progress_shown = True
return 0
prev, self.last_length = self.last_length, n
return prev
def _show(self, msg):
self.callback("\b" * self._erase(len(msg)) + msg)
def _show_percent(self):
if self.percent > self.last_percent:
self._show("%3d%% " % self.percent)
self.last_percent = self.percent
def clear(self):
if self.last_length:
self._show(" " * self.last_length)
def init(self, total):
self.total = total
self.current = 0
self.percent = 0
self.last_percent = -1
self.last_length = 0
self._show_percent()
def update(self, value):
self.current += value
percent = 100 * self.current // self.total
self.percent = min(max(percent, 0), 100)
self._show_percent()
def finish(self):
n = max(self.last_length - len(self.message), 0)
self._show(self.message + " " * n + "\n")
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