48
class _ChooseUI(object):
50
""" Helper class for choose implementation.
53
def __init__(self, ui, msg, choices, default):
56
self._build_alternatives(msg, choices, default)
58
def _setup_mode(self):
59
"""Setup input mode (line-based, char-based) and echo-back.
61
Line-based input is used if the BZR_TEXTUI_INPUT environment
62
variable is set to 'line-based', or if there is no controlling
65
if os.environ.get('BZR_TEXTUI_INPUT') != 'line-based' and \
66
self.ui.stdin == sys.stdin and self.ui.stdin.isatty():
67
self.line_based = False
70
self.line_based = True
71
self.echo_back = not self.ui.stdin.isatty()
73
def _build_alternatives(self, msg, choices, default):
74
"""Parse choices string.
76
Setup final prompt and the lists of choices and associated
81
self.alternatives = {}
82
choices = choices.split('\n')
83
if default is not None and default not in range(0, len(choices)):
84
raise ValueError("invalid default index")
86
name = c.replace('&', '').lower()
87
choice = (name, index)
88
if name in self.alternatives:
89
raise ValueError("duplicated choice: %s" % name)
90
self.alternatives[name] = choice
91
shortcut = c.find('&')
92
if -1 != shortcut and (shortcut + 1) < len(c):
94
help += '[' + c[shortcut + 1] + ']'
95
help += c[(shortcut + 2):]
96
shortcut = c[shortcut + 1]
98
c = c.replace('&', '')
100
help = '[%s]%s' % (shortcut, c[1:])
101
shortcut = shortcut.lower()
102
if shortcut in self.alternatives:
103
raise ValueError("duplicated shortcut: %s" % shortcut)
104
self.alternatives[shortcut] = choice
105
# Add redirections for default.
107
self.alternatives[''] = choice
108
self.alternatives['\r'] = choice
109
help_list.append(help)
112
self.prompt = u'%s (%s): ' % (msg, ', '.join(help_list))
115
line = self.ui.stdin.readline()
121
char = osutils.getchar()
122
if char == chr(3): # INTR
123
raise KeyboardInterrupt
124
if char == chr(4): # EOF (^d, C-d)
129
"""Keep asking the user until a valid choice is made.
132
getchoice = self._getline
134
getchoice = self._getchar
138
if 1 == iter or self.line_based:
139
self.ui.prompt(self.prompt)
143
self.ui.stderr.write('\n')
145
except KeyboardInterrupt:
146
self.ui.stderr.write('\n')
147
raise KeyboardInterrupt
148
choice = choice.lower()
149
if choice not in self.alternatives:
150
# Not a valid choice, keep on asking.
152
name, index = self.alternatives[choice]
154
self.ui.stderr.write(name + '\n')
44
158
class TextUIFactory(UIFactory):
45
159
"""A UI factory for Text user interefaces."""
58
172
self.stderr = stderr
59
173
# paints progress, network activity, etc
60
174
self._progress_view = self.make_progress_view()
176
def choose(self, msg, choices, default=None):
177
"""Prompt the user for a list of alternatives.
179
Support both line-based and char-based editing.
181
In line-based mode, both the shortcut and full choice name are valid
182
answers, e.g. for choose('prompt', '&yes\n&no'): 'y', ' Y ', ' yes',
183
'YES ' are all valid input lines for choosing 'yes'.
185
An empty line, when in line-based mode, or pressing enter in char-based
186
mode will select the default choice (if any).
188
Choice is echoed back if:
189
- input is char-based; which means a controlling terminal is available,
190
and osutils.getchar is used
191
- input is line-based, and no controlling terminal is available
194
choose_ui = _ChooseUI(self, msg, choices, default)
195
return choose_ui.interact()
197
def be_quiet(self, state):
198
if state and not self._quiet:
200
UIFactory.be_quiet(self, state)
201
self._progress_view = self.make_progress_view()
62
203
def clear_term(self):
63
204
"""Prepare the terminal for output.
70
211
# to clear it. We might need to separately check for the case of
71
212
self._progress_view.clear()
73
def get_boolean(self, prompt):
214
def get_integer(self, prompt):
75
self.prompt(prompt + "? [y/n]: ")
76
line = self.stdin.readline().lower()
77
if line in ('y\n', 'yes\n'):
79
elif line in ('n\n', 'no\n'):
81
elif line in ('', None):
82
# end-of-file; possibly should raise an error here instead
217
line = self.stdin.readline()
85
223
def get_non_echoed_password(self):
86
224
isatty = getattr(self.stdin, 'isatty', None)
135
273
def make_progress_view(self):
136
274
"""Construct and return a new ProgressView subclass for this UI.
138
# if the user specifically requests either text or no progress bars,
139
# always do that. otherwise, guess based on $TERM and tty presence.
140
if os.environ.get('BZR_PROGRESS_BAR') == 'text':
276
# with --quiet, never any progress view
277
# <https://bugs.launchpad.net/bzr/+bug/320035>. Otherwise if the
278
# user specifically requests either text or no progress bars, always
279
# do that. otherwise, guess based on $TERM and tty presence.
281
return NullProgressView()
282
elif os.environ.get('BZR_PROGRESS_BAR') == 'text':
141
283
return TextProgressView(self.stderr)
142
284
elif os.environ.get('BZR_PROGRESS_BAR') == 'none':
143
285
return NullProgressView()
147
289
return NullProgressView()
291
def _make_output_stream_explicit(self, encoding, encoding_type):
292
if encoding_type == 'exact':
293
# force sys.stdout to be binary stream on win32;
294
# NB: this leaves the file set in that mode; may cause problems if
295
# one process tries to do binary and then text output
296
if sys.platform == 'win32':
297
fileno = getattr(self.stdout, 'fileno', None)
300
msvcrt.setmode(fileno(), os.O_BINARY)
301
return TextUIOutputStream(self, self.stdout)
303
encoded_stdout = codecs.getwriter(encoding)(self.stdout,
304
errors=encoding_type)
305
# For whatever reason codecs.getwriter() does not advertise its encoding
306
# it just returns the encoding of the wrapped file, which is completely
307
# bogus. So set the attribute, so we can find the correct encoding later.
308
encoded_stdout.encoding = encoding
309
return TextUIOutputStream(self, encoded_stdout)
149
311
def note(self, msg):
150
312
"""Write an already-formatted message, clearing the progress bar if necessary."""
151
313
self.clear_term()
157
319
:param kwargs: Dictionary of arguments to insert into the prompt,
158
320
to allow UIs to reformat the prompt.
322
if type(prompt) != unicode:
323
raise ValueError("prompt %r not a unicode string" % prompt)
161
325
# See <https://launchpad.net/bugs/365891>
162
326
prompt = prompt % kwargs
163
327
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
164
328
self.clear_term()
165
330
self.stderr.write(prompt)
167
332
def report_transport_activity(self, transport, byte_count, direction):
191
365
warnings.warn("%r updated but no tasks are active" %
193
367
elif task != self._task_stack[-1]:
194
warnings.warn("%r is not the top progress task %r" %
195
(task, self._task_stack[-1]))
368
# We used to check it was the top task, but it's hard to always
369
# get this right and it's not necessarily useful: any actual
370
# problems will be evident in use
371
#warnings.warn("%r is not the top progress task %r" %
372
# (task, self._task_stack[-1]))
196
374
self._progress_view.show_progress(task)
198
376
def _progress_all_finished(self):
199
377
self._progress_view.clear()
379
def show_user_warning(self, warning_id, **message_args):
380
"""Show a text message to the user.
382
Explicitly not for warnings about bzr apis, deprecations or internals.
384
# eventually trace.warning should migrate here, to avoid logging and
385
# be easier to test; that has a lot of test fallout so for now just
386
# new code can call this
387
if warning_id not in self.suppressed_warnings:
388
self.stderr.write(self.format_user_warning(warning_id, message_args) +
202
392
class TextProgressView(object):
203
393
"""Display of progress bar and other information on a tty.
230
417
self._last_task = None
231
418
self._total_byte_count = 0
232
419
self._bytes_since_update = 0
420
self._bytes_by_direction = {'unknown': 0, 'read': 0, 'write': 0}
421
self._first_byte_time = None
233
422
self._fraction = 0
423
# force the progress bar to be off, as at the moment it doesn't
424
# correspond reliably to overall command progress
425
self.enable_bar = False
427
def _avail_width(self):
428
# we need one extra space for terminals that wrap on last char
429
w = osutils.terminal_width()
235
435
def _show_line(self, s):
236
436
# sys.stderr.write("progress %r\n" % s)
238
self._term_file.write('\r%-*.*s\r' % (n, n, s))
437
width = self._avail_width()
438
if width is not None:
439
s = '%-*.*s' % (width, width, s)
440
self._term_file.write('\r' + s + '\r')
241
443
if self._have_output:
290
497
t = t._parent_task
292
499
m = t.msg + ':' + m
295
502
def _render_line(self):
296
503
bar_string = self._render_bar()
297
504
if self._last_task:
298
task_msg = self._format_task(self._last_task)
505
task_part, counter_part = self._format_task(self._last_task)
507
task_part = counter_part = ''
301
508
if self._last_task and not self._last_task.show_transport_activity:
304
511
trans = self._last_transport_msg
307
return (bar_string + trans + task_msg)
512
# the bar separates the transport activity from the message, so even
513
# if there's no bar or spinner, we must show something if both those
515
if (task_part or trans) and not bar_string:
517
# preferentially truncate the task message if we don't have enough
519
avail_width = self._avail_width()
520
if avail_width is not None:
521
# if terminal avail_width is unknown, don't truncate
522
current_len = len(bar_string) + len(trans) + len(task_part) + len(counter_part)
523
gap = current_len - avail_width
525
task_part = task_part[:-gap-2] + '..'
526
s = trans + bar_string + task_part + counter_part
527
if avail_width is not None:
528
if len(s) < avail_width:
529
s = s.ljust(avail_width)
530
elif len(s) > avail_width:
309
534
def _repaint(self):
310
535
s = self._render_line()
334
559
This may update a progress bar, spinner, or similar display.
335
560
By default it does nothing.
337
# XXX: Probably there should be a transport activity model, and that
338
# too should be seen by the progress view, rather than being poked in
340
if not self._have_output:
341
# As a workaround for <https://launchpad.net/bugs/321935> we only
342
# show transport activity when there's already a progress bar
343
# shown, which time the application code is expected to know to
344
# clear off the progress bar when it's going to send some other
345
# output. Eventually it would be nice to have that automatically
562
# XXX: there should be a transport activity model, and that too should
563
# be seen by the progress view, rather than being poked in here.
348
564
self._total_byte_count += byte_count
349
565
self._bytes_since_update += byte_count
566
if self._first_byte_time is None:
567
# Note that this isn't great, as technically it should be the time
568
# when the bytes started transferring, not when they completed.
569
# However, we usually start with a small request anyway.
570
self._first_byte_time = time.time()
571
if direction in self._bytes_by_direction:
572
self._bytes_by_direction[direction] += byte_count
574
self._bytes_by_direction['unknown'] += byte_count
575
if 'no_activity' in debug.debug_flags:
576
# Can be used as a workaround if
577
# <https://launchpad.net/bugs/321935> reappears and transport
578
# activity is cluttering other output. However, thanks to
579
# TextUIOutputStream this shouldn't be a problem any more.
350
581
now = time.time()
351
582
if self._total_byte_count < 2000:
352
583
# a little resistance at first, so it doesn't stay stuck at 0
357
588
elif now >= (self._transport_update_time + 0.5):
358
589
# guard against clock stepping backwards, and don't update too
360
rate = self._bytes_since_update / (now - self._transport_update_time)
361
msg = ("%6dKB %5dKB/s" %
362
(self._total_byte_count>>10, int(rate)>>10,))
591
rate = (self._bytes_since_update
592
/ (now - self._transport_update_time))
593
# using base-10 units (see HACKING.txt).
594
msg = ("%6dkB %5dkB/s " %
595
(self._total_byte_count / 1000, int(rate) / 1000,))
363
596
self._transport_update_time = now
364
597
self._last_repaint = now
365
598
self._bytes_since_update = 0
366
599
self._last_transport_msg = msg
602
def _format_bytes_by_direction(self):
603
if self._first_byte_time is None:
606
transfer_time = time.time() - self._first_byte_time
607
if transfer_time < 0.001:
608
transfer_time = 0.001
609
bps = self._total_byte_count / transfer_time
611
# using base-10 units (see HACKING.txt).
612
msg = ('Transferred: %.0fkB'
613
' (%.1fkB/s r:%.0fkB w:%.0fkB'
614
% (self._total_byte_count / 1000.,
616
self._bytes_by_direction['read'] / 1000.,
617
self._bytes_by_direction['write'] / 1000.,
619
if self._bytes_by_direction['unknown'] > 0:
620
msg += ' u:%.0fkB)' % (
621
self._bytes_by_direction['unknown'] / 1000.
627
def log_transport_activity(self, display=False):
628
msg = self._format_bytes_by_direction()
630
if display and self._total_byte_count > 0:
632
self._term_file.write(msg + '\n')
635
class TextUIOutputStream(object):
636
"""Decorates an output stream so that the terminal is cleared before writing.
638
This is supposed to ensure that the progress bar does not conflict with bulk
641
# XXX: this does not handle the case of writing part of a line, then doing
642
# progress bar output: the progress bar will probably write over it.
643
# one option is just to buffer that text until we have a full line;
644
# another is to save and restore it
646
# XXX: might need to wrap more methods
648
def __init__(self, ui_factory, wrapped_stream):
649
self.ui_factory = ui_factory
650
self.wrapped_stream = wrapped_stream
651
# this does no transcoding, but it must expose the underlying encoding
652
# because some callers need to know what can be written - see for
653
# example unescape_for_display.
654
self.encoding = getattr(wrapped_stream, 'encoding', None)
657
self.ui_factory.clear_term()
658
self.wrapped_stream.flush()
660
def write(self, to_write):
661
self.ui_factory.clear_term()
662
self.wrapped_stream.write(to_write)
664
def writelines(self, lines):
665
self.ui_factory.clear_term()
666
self.wrapped_stream.writelines(lines)