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"""A module to interactively query"""
from pydoc import pager
from curtsies import CursorAwareWindow, Input, fsarray, fmtstr
from curtsies.fmtfuncs import underline
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(entry, width, active=False):
# (name, contents, state, value)
char = '*' if entry[2] else ' '
w = 3 + fmtstr(entry[0]).width + 2
text = fmtstr(entry[3])
return fmtstr(
'[' + underline(char) if active else char + '] ' +
entry[0] + ' ' +
entry[3][:width - w - 2] + '..' if text.width < width - w else entry[3])
def process_entry(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]))
class Prompt:
def __init__(self, entries):
self.entries = [process_entry(x) for x in entries]
self.idx = 0
self.text = ''
self.list = True
self.cursor_pos = Position()
def run(self):
with open('/dev/tty', 'r') as tty_in, \
open('/dev/tty', 'w') as tty_out, \
Input(in_stream=tty_in) as input_, \
CursorAwareWindow(in_stream=tty_in,
out_stream=tty_out,
hide_cursor=False,
extra_bytes_callback=input_.unget_bytes) as window:
self.window = window
self.render()
for event in input_:
if self.process_event(event) == -1:
break
self.render()
return [(x[0], x[1], x[3]) for x in self.entries if x[2]]
def clamp(self, x):
return clamp(x, 0, len(self.entries))
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 = clamp(self.idx - 1)
pager('Error: could not fetch '.format(entry))
self.entries[self.idx:self.idx+1] = [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
self.entries[self.idx][3] = not self.entries[self.idx][3]
def process_event(self, event):
if self.list:
if event == '<UP>':
self.idx = clamp(self.idx - 1)
elif event == '<DOWN>':
self.idx = clamp(self.idx + 1)
elif event == '<SPACE>':
self.toggle(self.idx)
elif event in {'p', 'P'}:
self.preview()
elif event in {'<ESC>', '<Ctrl-g>'}:
return -1
elif event in {'<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:
if event in {'<ESC>', '<Ctrl-g>'}:
self.list = True
if event == '<BACKSPACE>':
self.delete_last_char()
elif event == '<SPACE>':
self.add_char(' ')
elif event in {'<Ctrl-j>', '<Ctrl-m>'}:
self.set_text(self.text)
self.list = True
elif isinstance(event, str) and not event.startswith('<'):
self.add_char(event)
def render(self):
if self.list:
output = fsarray([render_entry(x) for x in self.entries] + [' [ OK ] '],
self.window.width)
self.window.render_to_terminal(output)
return
cur = self.entries[self.idx]
output = fsarray(['Please provide value for {}'.format(cur[0]), cur[3]], self.window.width)
self.window.render_to_terminal(output, (self.cursor_pos.row, self.cursor_pos.column))
def add_char(self, char):
self.entries[self.idx][3] += char
self.cursor_pos.column += 1
def delete_last_char(self):
if self.text:
self.entries[self.idx][3] += self.entries[self.idx][3][:-1]
self.cursor_pos.column -= 1
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