/usr/lib/python2.7/dist-packages/xapers/nci/ui.py is in xapers 0.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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This file is part of xapers.
Xapers is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
Xapers is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with xapers. If not, see <http://www.gnu.org/licenses/>.
Copyright 2012-2017
Jameson Rollins <jrollins@finestructure.net>
"""
import os
import sys
import urwid
import logging
import collections
from ..cli import initdb
from . import search
from . import bibview
from . import help
############################################################
PALETTE = [
('header', 'light gray', 'dark blue'),
('header_args', 'white', 'dark blue'),
('footer', 'light gray', 'dark blue'),
('prompt', 'black', 'dark green'),
]
class UI():
keys = collections.OrderedDict([
('s', "promptSearch"),
('q', "killBuffer"),
('Q', "quit"),
('?', "help"),
])
default_status_string = "s: new search, q: close buffer, Q: quit, ?: help"
buffers = []
search_history = []
tag_history = []
def __init__(self, cmd=None):
self.db = initdb()
# FIXME: set this properly
self.palette = list(set(PALETTE) | set(search.PALETTE))
self.view = urwid.Frame(urwid.SolidFill())
self.set_status()
self.mainloop = urwid.MainLoop(
self.view,
self.palette,
unhandled_input=self.keypress,
handle_mouse=False,
)
self.mainloop.screen.set_terminal_properties(colors=88)
if not cmd:
cmd = ['search', 'tag:new']
self.newbuffer(cmd)
self.mainloop.run()
##########
def set_status(self, text=None):
if text:
T = [urwid.Text(text)]
else:
T = [('pack', urwid.Text('Xapers [{}]'.format(len(self.buffers)))),
urwid.Text(self.default_status_string, align='right'),
]
self.view.set_footer(urwid.AttrMap(urwid.Columns(T), 'footer'))
def newbuffer(self, cmd):
if not cmd:
cmd = ['search', '*']
if cmd[0] == 'search':
query = ' '.join(cmd[1:])
buf = search.Search(self, query)
elif cmd[0] == 'bibview':
query = ' '.join(cmd[1:])
buf = bibview.Bibview(self, query)
elif cmd[0] == 'help':
target = None
if len(cmd) > 1:
target = cmd[1]
if isinstance(target, str):
target = None
buf = help.Help(self, target)
else:
buf = help.Help(self)
self.set_status("Unknown command '%s'." % (cmd[0]))
self.buffers.append(buf)
self.view.set_body(buf)
self.set_status()
def killBuffer(self):
"""close current buffer"""
if len(self.buffers) == 1:
return
self.buffers.pop()
buf = self.buffers[-1]
self.view.set_body(buf)
self.set_status()
self.mainloop.draw_screen()
def prompt(self, final, *args, **kwargs):
"""user prompt
final is a (func, args) tuple to be executed upon complection:
func(text, *args)
further args and kwargs are passed to PromptEdit
"""
pe = PromptEdit(*args, **kwargs)
urwid.connect_signal(pe, 'done', self.prompt_done, final)
self.view.set_footer(urwid.AttrMap(pe, 'prompt'))
self.view.set_focus('footer')
def prompt_done(self, text, final):
self.view.set_focus('body')
urwid.disconnect_signal(self, self.prompt, 'done', self.prompt_done)
(func, args) = final
func(text, *args)
##########
def promptSearch(self):
"""search database"""
prompt = 'search: '
self.prompt((self.promptSearch_done, []),
prompt, history=self.search_history)
def promptSearch_done(self, query):
if not query:
self.set_status()
return
self.newbuffer(['search', query])
def quit(self):
"""quit"""
sys.exit()
def help(self):
"""help"""
self.newbuffer(['help', self.buffers[-1]])
def keypress(self, key):
if key in self.keys:
cmd = "self.%s()" % (self.keys[key])
eval(cmd)
############################################################
class PromptEdit(urwid.Edit):
__metaclass__ = urwid.signals.MetaSignals
signals = ['done']
def __init__(self, prompt, initial=None, completions=None, history=None):
super(PromptEdit, self).__init__(caption=prompt)
if initial:
self.insert_text(initial)
self.completions = completions
self.completion_data = {}
self.history = history
self.history_pos = -1
self.last_text = ''
def keypress(self, size, key):
if self.last_text and self.edit_text != self.last_text:
self.completion_data.clear()
self.history_pos = -1
if key == 'enter':
urwid.emit_signal(self, 'done', self.get_edit_text())
return
elif key in ['esc', 'ctrl g']:
urwid.emit_signal(self, 'done', None)
return
# navigation
elif key == 'ctrl a':
# move to beginning
key = 'home'
elif key == 'ctrl e':
# move to end
key = 'end'
elif key == 'ctrl b':
# back character
self.set_edit_pos(self.edit_pos-1)
elif key == 'ctrl f':
# forward character
self.set_edit_pos(self.edit_pos+1)
elif key == 'meta b':
# back word
text = self.edit_text
pos = self.edit_pos - 1
inword = False
while True:
try:
text[pos]
except IndexError:
break
if text[pos] != ' ' and not inword:
inword = True
continue
if inword:
if text[pos] == ' ':
break
pos -= 1
self.set_edit_pos(pos+1)
elif key == 'meta f':
# forward word
text = self.edit_text
pos = self.edit_pos
inword = False
while True:
try:
text[pos]
except IndexError:
break
if text[pos] != ' ' and not inword:
inword = True
continue
if inword:
if text[pos] == ' ':
break
pos += 1
self.set_edit_pos(pos+1)
# deletion
elif key == 'ctrl d':
# delete character
text = self.edit_text
pos = self.edit_pos
ntext = text[:pos] + text[pos+1:]
self.set_edit_text(ntext)
elif key == 'ctrl k':
# delete to end
self.set_edit_text(self.edit_text[:self.edit_pos])
# history
elif key in ['up', 'ctrl p']:
if self.history:
if self.history_pos == -1:
self.history_full = self.history + [self.edit_text]
try:
self.history_pos -= 1
self.set_edit_text(self.history_full[self.history_pos])
self.set_edit_pos(len(self.edit_text))
except IndexError:
self.history_pos += 1
elif key in ['down', 'ctrl n']:
if self.history:
if self.history_pos != -1:
self.history_pos += 1
self.set_edit_text(self.history_full[self.history_pos])
self.set_edit_pos(len(self.edit_text))
# tab completion
elif key == 'tab' and self.completions:
# tab complete on individual words
# retrieve current text and position
text = self.edit_text
pos = self.edit_pos
# find the completion prefix
tpos = pos - 1
while True:
try:
if text[tpos] == ' ':
tpos += 1
break
except IndexError:
break
tpos -= 1
prefix = text[tpos:pos]
# FIXME: this prefix stripping should not be done here
prefix = prefix.lstrip('+-')
# find the end of the word
tpos += 1
while True:
try:
if text[tpos] == ' ':
break
except IndexError:
break
tpos += 1
# record/clear completion data
if self.completion_data:
# clear the data if the prefix is new
if prefix != self.completion_data['prefix']:
self.completion_data.clear()
# otherwise rotate the queue
else:
self.completion_data['q'].rotate(-1)
else:
self.completion_data['prefix'] = prefix
# harvest completions
q = collections.deque()
for c in self.completions:
if c.startswith(prefix):
q.append(c)
self.completion_data['q'] = q
logging.debug(self.completion_data)
# insert completion at point
if self.completion_data and self.completion_data['q']:
c = self.completion_data['q'][0][len(prefix):]
ntext = text[:pos] + c + text[tpos:]
self.set_edit_text(ntext)
self.set_edit_pos(pos)
# record the last text
self.last_text = self.edit_text
return super(PromptEdit, self).keypress(size, key)
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