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')
158
44
class TextUIFactory(UIFactory):
159
45
"""A UI factory for Text user interefaces."""
172
61
self.stderr = stderr
173
62
# paints progress, network activity, etc
174
63
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()
203
65
def clear_term(self):
204
66
"""Prepare the terminal for output.
211
73
# to clear it. We might need to separately check for the case of
212
74
self._progress_view.clear()
214
def get_integer(self, prompt):
76
def get_boolean(self, prompt):
217
line = self.stdin.readline()
78
self.prompt(prompt + "? [y/n]: ")
79
line = self.stdin.readline().lower()
80
if line in ('y\n', 'yes\n'):
82
elif line in ('n\n', 'no\n'):
84
elif line in ('', None):
85
# end-of-file; possibly should raise an error here instead
223
88
def get_non_echoed_password(self):
224
89
isatty = getattr(self.stdin, 'isatty', None)
273
138
def make_progress_view(self):
274
139
"""Construct and return a new ProgressView subclass for this UI.
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
# if the user specifically requests either text or no progress bars,
142
# always do that. otherwise, guess based on $TERM and tty presence.
143
if os.environ.get('BZR_PROGRESS_BAR') == 'text':
283
144
return TextProgressView(self.stderr)
284
145
elif os.environ.get('BZR_PROGRESS_BAR') == 'none':
285
146
return NullProgressView()
289
150
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)
311
152
def note(self, msg):
312
153
"""Write an already-formatted message, clearing the progress bar if necessary."""
313
154
self.clear_term()
319
160
:param kwargs: Dictionary of arguments to insert into the prompt,
320
161
to allow UIs to reformat the prompt.
322
if type(prompt) != unicode:
323
raise ValueError("prompt %r not a unicode string" % prompt)
325
164
# See <https://launchpad.net/bugs/365891>
326
165
prompt = prompt % kwargs
327
166
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
328
167
self.clear_term()
330
168
self.stderr.write(prompt)
332
170
def report_transport_activity(self, transport, byte_count, direction):
338
176
self._progress_view.show_transport_activity(transport,
339
177
direction, byte_count)
341
def log_transport_activity(self, display=False):
342
"""See UIFactory.log_transport_activity()"""
343
log = getattr(self._progress_view, 'log_transport_activity', None)
347
def show_error(self, msg):
349
self.stderr.write("bzr: error: %s\n" % msg)
351
def show_message(self, msg):
354
def show_warning(self, msg):
356
if isinstance(msg, unicode):
357
te = osutils.get_terminal_encoding()
358
msg = msg.encode(te, 'replace')
359
self.stderr.write("bzr: warning: %s\n" % msg)
361
179
def _progress_updated(self, task):
362
180
"""A task has been updated and wants to be displayed.
365
183
warnings.warn("%r updated but no tasks are active" %
367
185
elif 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]))
186
warnings.warn("%r is not the top progress task %r" %
187
(task, self._task_stack[-1]))
374
188
self._progress_view.show_progress(task)
376
190
def _progress_all_finished(self):
377
191
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) +
392
194
class TextProgressView(object):
393
195
"""Display of progress bar and other information on a tty.
417
222
self._last_task = None
418
223
self._total_byte_count = 0
419
224
self._bytes_since_update = 0
420
self._bytes_by_direction = {'unknown': 0, 'read': 0, 'write': 0}
421
self._first_byte_time = None
422
225
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()
435
227
def _show_line(self, s):
436
228
# sys.stderr.write("progress %r\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')
230
self._term_file.write('\r%-*.*s\r' % (n, n, s))
443
233
if self._have_output:
497
282
t = t._parent_task
499
284
m = t.msg + ':' + m
502
287
def _render_line(self):
503
288
bar_string = self._render_bar()
504
289
if self._last_task:
505
task_part, counter_part = self._format_task(self._last_task)
290
task_msg = self._format_task(self._last_task)
507
task_part = counter_part = ''
508
293
if self._last_task and not self._last_task.show_transport_activity:
511
296
trans = self._last_transport_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:
299
return (bar_string + trans + task_msg)
534
301
def _repaint(self):
535
302
s = self._render_line()
559
326
This may update a progress bar, spinner, or similar display.
560
327
By default it does nothing.
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.
329
# XXX: Probably there should be a transport activity model, and that
330
# too should be seen by the progress view, rather than being poked in
332
if not self._have_output:
333
# As a workaround for <https://launchpad.net/bugs/321935> we only
334
# show transport activity when there's already a progress bar
335
# shown, which time the application code is expected to know to
336
# clear off the progress bar when it's going to send some other
337
# output. Eventually it would be nice to have that automatically
564
340
self._total_byte_count += byte_count
565
341
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.
581
342
now = time.time()
582
343
if self._total_byte_count < 2000:
583
344
# a little resistance at first, so it doesn't stay stuck at 0
588
349
elif now >= (self._transport_update_time + 0.5):
589
350
# guard against clock stepping backwards, and don't update too
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,))
352
rate = self._bytes_since_update / (now - self._transport_update_time)
353
msg = ("%6dKB %5dKB/s" %
354
(self._total_byte_count>>10, int(rate)>>10,))
596
355
self._transport_update_time = now
597
356
self._last_repaint = now
598
357
self._bytes_since_update = 0
599
358
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)
added
removed
bzrlib/ui/text.py
