/usr/lib/python2.7/dist-packages/ttystatus/status.py is in python-ttystatus 0.38-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 | # Copyright 2010, 2011 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
import ttystatus
class TerminalStatus(object):
'''Show status and progress information on a terminal.
All output is provided via widgets of various kinds. Many widgets
format data that TerminalStatus stores. TerminalStatus provides a
dict interface for setting and retrieving data items. Unlike a real
dict, getting a value for a key that has not been set does not
result in a KeyError exception, but in the empty string being
returned.
'''
def __init__(self, period=None, messager=None, _terminal=None):
self._m = messager or ttystatus.Messager(
period=period, _terminal=_terminal)
self.clear()
def get_terminal_size(self): # pragma: no cover
'''Return terminal width, height.'''
return self._m.get_terminal_size()
def add(self, widget):
'''Add a new widget to the status display.'''
if not self._widget_rows:
self._widget_rows = [[]]
self._widget_rows[-1].append(widget)
self._register_interests(widget)
self.flush()
def _register_interests(self, widget):
if getattr(widget, 'interested_in', None) is None:
self._unknown_interest.append(widget)
else:
for key in widget.interested_in:
widgets = self._interested_in.get(key, [])
widgets.append(widget)
self._interested_in[key] = widgets
def start_new_line(self): # pragma: no cover
'''Start a new line of widgets.'''
if not self._widget_rows:
self._widget_rows = [[]]
self._widget_rows.append([])
self.flush()
def format(self, format_string):
'''Add new widgets based on format string.
The format string is taken literally, except that ``%%`` is a
literal percent character, and ``%Foo(a,b,c)`` is a widget
of type ``Foo`` with parameters a, b, and c. For example:
``format("hello, %String(name)")``.
'''
for i, line in enumerate(format_string.split('\n')):
if i > 0: # pragma: no cover
self.start_new_line()
for widget in ttystatus.parse(line):
self.add(widget)
self.flush()
@property
def widgets(self):
result = []
for row in self._widget_rows:
result += row
return result
def clear(self):
'''Remove all widgets.'''
self._widget_rows = []
self._values = {}
self._interested_in = {}
self._unknown_interest = []
self._m.clear()
def __getitem__(self, key):
'''Return value for key, or the empty string.'''
return self._values.get(key, '')
def get(self, key, default=None):
'''Like dict.get.'''
return self._values.get(key, default)
def __setitem__(self, key, value):
'''Set value for key.'''
self._values[key] = value
widget_lists = [
self._interested_in.get(key, []),
self._unknown_interest,
]
for widgets in widget_lists:
for w in widgets:
w.update(self)
if self._m.enabled and self._m.time_to_write():
self._write()
def hide(self): # pragma: no cover
'''Hide current progress report.
Use .flush() to make it visible again. Hiding is useful if you
want to write things to stdout/stderr that might get mixed
with progress output. The .notify() and .error() methods get
disabled if progress reporting gets disabled, but .hide()
doesn't.
'''
self._m.clear()
def flush(self):
'''Force an update of current state to the screen.
This happens even if it is not yet time to output the screen.
'''
self._write(force=True)
def _render(self):
'''Render current state of all widgets.'''
return '\n'.join(self._render_row(row) for row in self._widget_rows)
def _render_row(self, widget_row):
max_chars = self._m.get_max_line_length()
remaining = max_chars
texts = [None] * len(widget_row)
for i, w in enumerate(widget_row):
if w.static_width:
texts[i] = self._make_safe(w.render(0))
remaining -= len(texts[i])
for i, w in enumerate(widget_row):
if not w.static_width:
texts[i] = self._make_safe(w.render(remaining))
remaining -= len(texts[i])
return (''.join(texts))[:max_chars]
def _make_safe(self, line):
'''Expand TABs, remove all other ASCII control characters.'''
ASCII_SPACE = 32
return ''.join(
c if ord(c) >= ASCII_SPACE else ''
for c in line.expandtabs())
def _write(self, force=False):
'''Render and output current state of all widgets.'''
self._m.write(self._render(), force=force)
def increase(self, key, delta):
'''Increase value for a key by a given amount.'''
self[key] = (self[key] or 0) + delta
def notify(self, msg):
'''Show a message.'''
self._m.notify(msg, sys.stdout)
def error(self, msg):
'''Write an error message.'''
self._m.notify(msg, sys.stderr, force=True)
def finish(self):
'''Finish status display.'''
self._write()
self._m.finish()
def disable(self):
'''Disable all output.'''
self._m.disable()
def enable(self):
'''Enable output if it has been disabled.'''
self._m.enable()
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