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# Copyright (C) 2011-2018 Patrick Totzke <patricktotzke@gmail.com>
# This file is released under the GNU GPL, version 3 or a later revision.
# For further details see the COPYING file
import urwid
from .buffer import Buffer
from ..settings.const import settings
from ..widgets.bufferlist import BufferlineWidget
class BufferlistBuffer(Buffer):
"""lists all active buffers"""
modename = 'bufferlist'
def __init__(self, ui, filtfun=lambda x: x):
self.filtfun = filtfun
self.ui = ui
self.isinitialized = False
self.rebuild()
super().__init__()
def index_of(self, b):
"""
returns the index of :class:`Buffer` `b` in the global list of active
buffers.
"""
return self.ui.buffers.index(b)
def rebuild(self):
if self.isinitialized:
focusposition = self.bufferlist.get_focus()[1]
else:
focusposition = 0
self.isinitialized = True
lines = list()
displayedbuffers = [b for b in self.ui.buffers if self.filtfun(b)]
for (num, b) in enumerate(displayedbuffers):
line = BufferlineWidget(b)
if (num % 2) == 0:
attr = settings.get_theming_attribute('bufferlist',
'line_even')
else:
attr = settings.get_theming_attribute('bufferlist', 'line_odd')
focus_att = settings.get_theming_attribute('bufferlist',
'line_focus')
buf = urwid.AttrMap(line, attr, focus_att)
num = urwid.Text('%3d:' % self.index_of(b))
lines.append(urwid.Columns([('fixed', 4, num), buf]))
self.bufferlist = urwid.ListBox(urwid.SimpleListWalker(lines))
num_buffers = len(displayedbuffers)
if focusposition is not None and num_buffers > 0:
self.bufferlist.set_focus(focusposition % num_buffers)
self.body = self.bufferlist
def get_selected_buffer(self):
"""returns currently selected :class:`Buffer` element from list"""
linewidget, _ = self.bufferlist.get_focus()
bufferlinewidget = linewidget.get_focus().original_widget
return bufferlinewidget.get_buffer()
def focus_first(self):
"""Focus the first line in the buffer list."""
self.body.set_focus(0)
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