48
class _ChooseUI(object):
50
""" Helper class for choose implementation.
53
def __init__(self, ui, msg, choices, default):
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self._build_alternatives(msg, choices, default)
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def _setup_mode(self):
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"""Setup input mode (line-based, char-based) and echo-back.
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Line-based input is used if the BZR_TEXTUI_INPUT environment
62
variable is set to 'line-based', or if there is no controlling
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if os.environ.get('BZR_TEXTUI_INPUT') != 'line-based' and \
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self.ui.stdin == sys.stdin and self.ui.stdin.isatty():
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self.line_based = False
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self.line_based = True
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self.echo_back = not self.ui.stdin.isatty()
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def _build_alternatives(self, msg, choices, default):
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"""Parse choices string.
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Setup final prompt and the lists of choices and associated
81
self.alternatives = {}
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choices = choices.split('\n')
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if default is not None and default not in range(0, len(choices)):
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raise ValueError("invalid default index")
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name = c.replace('&', '').lower()
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choice = (name, index)
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if name in self.alternatives:
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raise ValueError("duplicated choice: %s" % name)
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self.alternatives[name] = choice
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shortcut = c.find('&')
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if -1 != shortcut and (shortcut + 1) < len(c):
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help += '[' + c[shortcut + 1] + ']'
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help += c[(shortcut + 2):]
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shortcut = c[shortcut + 1]
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c = c.replace('&', '')
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help = '[%s]%s' % (shortcut, c[1:])
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shortcut = shortcut.lower()
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if shortcut in self.alternatives:
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raise ValueError("duplicated shortcut: %s" % shortcut)
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self.alternatives[shortcut] = choice
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# Add redirections for default.
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self.alternatives[''] = choice
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self.alternatives['\r'] = choice
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help_list.append(help)
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self.prompt = u'%s (%s): ' % (msg, ', '.join(help_list))
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line = self.ui.stdin.readline()
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char = osutils.getchar()
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if char == chr(3): # INTR
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raise KeyboardInterrupt
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if char == chr(4): # EOF (^d, C-d)
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"""Keep asking the user until a valid choice is made.
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getchoice = self._getline
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getchoice = self._getchar
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if 1 == iter or self.line_based:
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self.ui.prompt(self.prompt)
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self.ui.stderr.write('\n')
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except KeyboardInterrupt:
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self.ui.stderr.write('\n')
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raise KeyboardInterrupt
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choice = choice.lower()
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if choice not in self.alternatives:
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# Not a valid choice, keep on asking.
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name, index = self.alternatives[choice]
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self.ui.stderr.write(name + '\n')
46
158
class TextUIFactory(UIFactory):
47
159
"""A UI factory for Text user interefaces."""
61
173
# paints progress, network activity, etc
62
174
self._progress_view = self.make_progress_view()
176
def choose(self, msg, choices, default=None):
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"""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',
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'YES ' are all valid input lines for choosing 'yes'.
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An empty line, when in line-based mode, or pressing enter in char-based
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mode will select the default choice (if any).
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Choice is echoed back if:
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- 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)
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return choose_ui.interact()
64
197
def be_quiet(self, state):
65
198
if state and not self._quiet:
78
211
# to clear it. We might need to separately check for the case of
79
212
self._progress_view.clear()
81
def get_boolean(self, prompt):
83
self.prompt(prompt + "? [y/n]: ")
84
line = self.stdin.readline().lower()
85
if line in ('y\n', 'yes\n'):
87
elif line in ('n\n', 'no\n'):
89
elif line in ('', None):
90
# end-of-file; possibly should raise an error here instead
93
214
def get_integer(self, prompt):
95
216
self.prompt(prompt)
198
319
:param kwargs: Dictionary of arguments to insert into the prompt,
199
320
to allow UIs to reformat the prompt.
322
if type(prompt) != unicode:
323
raise ValueError("prompt %r not a unicode string" % prompt)
202
325
# See <https://launchpad.net/bugs/365891>
203
326
prompt = prompt % kwargs
204
327
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
205
328
self.clear_term()
206
330
self.stderr.write(prompt)
208
332
def report_transport_activity(self, transport, byte_count, direction):
280
404
this only prints the stack from the nominated current task up to the root.
283
def __init__(self, term_file):
407
def __init__(self, term_file, encoding=None, errors="replace"):
284
408
self._term_file = term_file
410
self._encoding = getattr(term_file, "encoding", None) or "ascii"
412
self._encoding = encoding
413
self._encoding_errors = errors
285
414
# true when there's output on the screen we may need to clear
286
415
self._have_output = False
287
416
self._last_transport_msg = ''
311
def _show_line(self, s):
312
# sys.stderr.write("progress %r\n" % s)
440
def _show_line(self, u):
441
s = u.encode(self._encoding, self._encoding_errors)
313
442
width = self._avail_width()
314
443
if width is not None:
444
# GZ 2012-03-28: Counting bytes is wrong for calculating width of
445
# text but better than counting codepoints.
315
446
s = '%-*.*s' % (width, width, s)
316
447
self._term_file.write('\r' + s + '\r')