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"""A module to interactively query"""
from pydoc import pager
from curtsies import CursorAwareWindow, Input, fsarray, fmtstr
from curtsies.fmtfuncs import invert
from pbraw import grab
class Position:
def __init__(self, row=0, column=0):
self.row = row
self.column = column
def clamp(x, m, M):
return max(m, min(x, M))
def render_entry(name, state, value, width, active=False):
char = '*' if state else ' '
w = 3 + fmtstr(name).width + 2
if value:
text = fmtstr(value)
val = value[:width - w - 2] + '..' if text.width >= width - w else value
else:
val = ''
return fmtstr(
'[' + (invert(char) if active else char) + '] ' +
name + ' ' + val)
class Prompt:
def __init__(self, entries):
self.entries = [self.process_entry(x) for x in entries]
self.idx = 0
self.cursor_pos = Position()
def run(self, window_type=CursorAwareWindow, **args):
with open('/dev/tty', 'r') as tty_in, \
open('/dev/tty', 'w') as tty_out, \
Input(in_stream=tty_in) as input_:
if window_type == CursorAwareWindow:
iargs = {'in_stream':tty_in, 'out_stream':tty_out,
'hide_cursor':False, 'extra_bytes_callback':input_.unget_bytes}
else:
iargs = {'out_stream':tty_out}
iargs.update(args)
with window_type(**args) as window:
return self.event_loop(window, input_)
def event_loop(self, window, input_):
self.window = window
self.render()
for event in input_:
if self.process_event(event) == -1:
break
self.render()
return self.results()
def clamp(self, x):
return clamp(x, 0, len(self.entries))
def results(self):
raise NotImplementedError()
def preview(self):
pass
def extract_nsv(self, entry):
raise NotImplementedError()
def toggle(self):
raise NotImplementedError()
def process_entry(self, entry):
raise NotImplementedError()
def process_event(self, event):
if event == '<UP>':
self.idx = self.clamp(self.idx - 1)
elif event == '<DOWN>':
self.idx = self.clamp(self.idx + 1)
elif event == '<SPACE>':
self.toggle()
elif event in {'p', 'P'}:
self.preview()
elif event in {'<ESC>', '<Ctrl-g>'}:
return -1
else:
return False
return True
def render(self):
output = fsarray(
[render_entry(*self.extract_nsv(x), self.window.width, i == self.idx) for i, x in enumerate(self.entries)] +
[' [ ' +
('OK' if self.idx < len(self.entries) else invert('OK')) +
' ] '], width=self.window.width)
self.window.render_to_terminal(output)
class PickerPrompt(Prompt):
def process_entry(self, entry):
return (entry[0], False, entry[1])
def extract_nsv(self, entry):
return entry
def results(self):
return [x[0] for x in self.entries if x[1]]
def toggle(self):
if self.idx == len(self.entries):
return
e = self.entries[self.idx]
self.entries[self.idx] = (e[0], e[1], not e[2], e[3])
class EditSelectPrompt(Prompt):
def __init__(self, items):
super().__init__(items)
self.text = ''
self.list = True
def render(self):
if self.list:
super().render()
else:
self.cursor_pos.row = 1
cur = self.entries[self.idx]
output = fsarray(['Please provide value for {}'.format(cur[0]), cur[3]], width=self.window.width)
self.window.render_to_terminal(output, (self.cursor_pos.row, self.cursor_pos.column))
def results(self):
return [(x[0], x[1], x[3]) for x in self.entries if x[2]]
def extract_nsv(self, entry):
return (entry[0], entry[2], entry[3])
def process_event(self, event):
if self.list:
res = super().process_event(event)
if res == -1:
return -1
elif res:
return True
elif event in {'e', '<Ctrl-j>', '<Ctrl-m>'}:
self.list = False
if self.idx == len(self.entries):
return -1
self.cursor_pos.column = fmtstr(self.entries[self.idx][3]).width
else:
return False
return True
else:
if event in {'<ESC>', '<Ctrl-g>'}:
self.list = True
if event == '<BACKSPACE>':
self.delete_cur_char()
elif event == '<SPACE>':
self.add_char(' ')
elif event == '<HOME>':
self.cursor_pos.column = 0
elif event == '<END>':
self.cursor_pos.column = fmtstr(self.entries[self.idx][3]).width
elif event == '<LEFT>':
self.cursor_pos.column = clamp(self.cursor_pos.column - 1,
0, fmtstr(self.entries[self.idx][3]).width)
elif event == '<RIGHT>':
self.cursor_pos.column = clamp(self.cursor_pos.column + 1,
0, fmtstr(self.entries[self.idx][3]).width)
elif event in {'<Ctrl-j>', '<Ctrl-m>'}:
self.list = True
elif isinstance(event, str) and not event.startswith('<'):
self.add_char(event)
return False
return True
def process_entry(self, entry):
if isinstance(entry, str):
return (entry[0], None, False, None)
return (entry[0], entry[1], False, entry[0] if entry[0].endswith('.ebuild') else 'files/{}'.format(entry[0]))
def preview(self):
entry = self.entries[self.idx]
if entry[0] is not None:
pager(entry[1])
else:
gr = grab(entry)
if not gr:
del self.entries[self.idx]
self.idx = self.clamp(self.idx - 1)
pager('Error: could not fetch {}'.format(entry))
self.entries[self.idx:self.idx+1] = [self.process_entry((x[0], x[1].encode('utf-8'))) for x in gr]
pager(self.entries[self.idx][1])
def toggle(self):
if self.idx == len(self.entries):
return
e = self.entries[self.idx]
self.entries[self.idx] = (e[0], e[1], not e[2], e[3])
def add_char(self, char):
e = self.entries[self.idx]
p = self.cursor_pos.column
self.entries[self.idx] = (e[0], e[1], e[2], e[3][:p] + char + e[3][p:])
self.cursor_pos.column += 1
def delete_cur_char(self):
e = self.entries[self.idx]
p = self.cursor_pos.column
if e[3]:
self.entries[self.idx] = (e[0], e[1], e[2], e[3][:p - 1] + e[3][p:])
self.cursor_pos.column -= 1
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