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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 os
import urwid
from .buffer import Buffer
from ..helper import shorten_author_string
from ..settings.const import settings
from ..widgets.globals import AttachmentWidget
def string_sanitize(string, tab_width=8):
r"""
strips, and replaces non-printable characters
:param tab_width: number of spaces to replace tabs with. Read from
`globals.tabwidth` setting if `None`
:type tab_width: int or `None`
>>> string_sanitize(' foo\rbar ', 8)
' foobar '
>>> string_sanitize('foo\tbar', 8)
'foo bar'
>>> string_sanitize('foo\t\tbar', 8)
'foo bar'
"""
string = string.replace('\r', '')
lines = list()
for line in string.split('\n'):
tab_count = line.count('\t')
if tab_count > 0:
line_length = 0
new_line = list()
for i, chunk in enumerate(line.split('\t')):
line_length += len(chunk)
new_line.append(chunk)
if i < tab_count:
next_tab_stop_in = tab_width - (line_length % tab_width)
new_line.append(' ' * next_tab_stop_in)
line_length += next_tab_stop_in
lines.append(''.join(new_line))
else:
lines.append(line)
return '\n'.join(lines)
class _HeadersList(urwid.WidgetWrap):
""" renders a pile of header values as key/value list """
def __init__(self, headerslist, key_attr, value_attr, gaps_attr=None):
"""
:param headerslist: list of key/value pairs to display
:type headerslist: list of (str, str)
:param key_attr: theming attribute to use for keys
:type key_attr: urwid.AttrSpec
:param value_attr: theming attribute to use for values
:type value_attr: urwid.AttrSpec
:param gaps_attr: theming attribute to wrap lines in
:type gaps_attr: urwid.AttrSpec
"""
self.headers = headerslist
self.key_attr = key_attr
self.value_attr = value_attr
pile = urwid.Pile(self._build_lines(headerslist))
if gaps_attr is None:
gaps_attr = key_attr
pile = urwid.AttrMap(pile, gaps_attr)
urwid.WidgetWrap.__init__(self, pile)
def __str__(self):
return str(self.headers)
def _build_lines(self, lines):
max_key_len = 1
headerlines = []
# calc max length of key-string
for key, value in lines:
if len(key) > max_key_len:
max_key_len = len(key)
for key, value in lines:
# todo : even/odd
keyw = ('fixed', max_key_len + 1,
urwid.Text((self.key_attr, key)))
valuew = urwid.Text((self.value_attr, value))
line = urwid.Columns([keyw, valuew])
headerlines.append(line)
return headerlines
class EnvelopeBuffer(Buffer):
"""message composition mode"""
modename = 'envelope'
def __init__(self, envelope):
self.envelope = envelope
self.all_headers = False
self.rebuild()
super().__init__()
def __str__(self):
to = self.envelope.get('To', fallback='unset')
return '[envelope] to: %s' % (shorten_author_string(to, 400))
async def get_info(self):
info = {}
info['to'] = self.envelope.get('To', fallback='unset')
return info
def cleanup(self):
if self.envelope.tmpfile:
os.unlink(self.envelope.tmpfile.name)
def rebuild(self):
displayed_widgets = []
hidden = settings.get('envelope_headers_blacklist')
# build lines
lines = []
for (k, vlist) in self.envelope.headers.items():
if (k not in hidden) or self.all_headers:
for value in vlist:
lines.append((k, value))
# sign/encrypt lines
if self.envelope.sign:
description = 'Yes'
sign_key = self.envelope.sign_key
if sign_key is not None and len(sign_key.subkeys) > 0:
description += ', with key ' + sign_key.uids[0].uid
lines.append(('GPG sign', description))
if self.envelope.encrypt:
description = 'Yes'
encrypt_keys = self.envelope.encrypt_keys.values()
if len(encrypt_keys) == 1:
description += ', with key '
elif len(encrypt_keys) > 1:
description += ', with keys '
key_ids = []
for key in encrypt_keys:
if key is not None and key.subkeys:
key_ids.append(key.uids[0].uid)
description += ', '.join(key_ids)
lines.append(('GPG encrypt', description))
if self.envelope.tags:
lines.append(('Tags', ','.join(self.envelope.tags)))
# add header list widget iff header values exists
if lines:
key_att = settings.get_theming_attribute('envelope', 'header_key')
value_att = settings.get_theming_attribute('envelope',
'header_value')
gaps_att = settings.get_theming_attribute('envelope', 'header')
self.header_wgt = _HeadersList(lines, key_att, value_att, gaps_att)
displayed_widgets.append(self.header_wgt)
# display attachments
lines = []
for a in self.envelope.attachments:
lines.append(AttachmentWidget(a, selectable=False))
if lines:
self.attachment_wgt = urwid.Pile(lines)
displayed_widgets.append(self.attachment_wgt)
self.body_wgt = urwid.Text(string_sanitize(self.envelope.body))
displayed_widgets.append(self.body_wgt)
self.body = urwid.ListBox(displayed_widgets)
def toggle_all_headers(self):
"""toggles visibility of all envelope headers"""
self.all_headers = not self.all_headers
self.rebuild()
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