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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
featherweight – A lightweight terminal news feed reader
Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
'''
import os
import sys
from subprocess import Popen, PIPE
from flocker import *
height_width = Popen('stty size'.split(' '), stdout = PIPE, stderr = PIPE).communicate()[0]
(height, width) = height_width.decode('utf-8', 'error')[:-1].split(' ')
old_stty = Popen('stty --save'.split(' '), stdout = PIPE, stderr = PIPE).communicate()[0]
old_stty = old_stty.decode('utf-8', 'error')[:-1]
Popen('stty -icanon -echo'.split(' '), stdout = PIPE, stderr = PIPE).communicate()
home = os.environ['HOME']
root = '%s/.featherweight' % home
if not os.path.exists(root):
os.makedirs(root)
islinux = ('TERM' not in os.environ) or (os.environ['TERM'] == 'linux')
feeds = None
with touch('%s/feeds' % root) as feeds_flock:
flock(feeds_flock, False)
with open('%s/feeds' % root, 'rb') as file:
feeds = file.read().decode('utf-8', 'error')
if len(feeds) == 0:
feeds = '[]'
feeds = eval(feeds)
unflock(feeds_flock)
def count_new(feeds):
rc = 0
for feed in feeds:
count = 0
if 'inner' in feed:
count = count_new(feed['inner'])
feed['new'] = count
else:
count = feed['new']
rc += count
return rc
def is_expanded(feed):
return ('expanded' not in feed) or feed['expanded']
def print_node(feed, last, indent):
title = feed['title']
prefix = indent + ('└' if last else '├')
collapsed = False
if ('inner' not in feed) or (is_expanded(feed)):
prefix += '── ' if islinux else '─╼ '
else:
collapsed = True
prefix += '─┘ ' if islinux else '─┚ '
if feed['new'] > 0:
prefix += '\033[01;31m(%i)\033[00m ' % feed['new']
if select_stack[-1][0] is feed:
title = '\033[01;34m%s\033[00m' % title
print(prefix + title)
if ('inner' in feed) and not collapsed:
inner = feed['inner']
for feed in inner:
print_node(feed, feed is inner[-1], indent + (' ' if last else '│ '))
count = count_new(feeds)
def print_tree():
print('\033[H\033[2J', end = '')
if count > 0:
print('\033[01;31m(%i)\033[00m' % count, end = ' ')
title = 'My Feeds'
if len(select_stack) == 1:
title = '\033[01;34m%s\033[00m' % title
print(title)
for feed in feeds:
print_node(feed, feed is feeds[-1], '')
print('\033[?1049h\033[?25l', end = '')
select_stack = [(None, None)]
global collapsed_count
collapsed_count = 0
print_tree()
try:
buf = ''
while True:
buf += sys.stdin.read(1)
buf = buf[-10:]
if buf.endswith('\033[A'):
if select_stack[-1][0] is not None:
cur = select_stack[-1][0]
curi = select_stack[-1][1]
select_stack.pop()
if curi > 0:
par = select_stack[-1][0]
par = feeds if par is None else par['inner']
curi -= 1
cur = par[curi]
select_stack.append((cur, curi))
while ('inner' in cur) and is_expanded(cur):
curi = len(cur['inner']) - 1
cur = cur['inner'][curi]
select_stack.append((cur, curi))
print_tree()
elif buf.endswith('\033[1;5A'):
if select_stack[-1][0] is not None:
cur = select_stack[-1][0]
curi = select_stack[-1][1]
select_stack.pop()
if curi > 0:
par = select_stack[-1][0]
par = feeds if par is None else par['inner']
select_stack.append((par[curi - 1], curi - 1))
print_tree()
elif buf.endswith('\033[B'):
if select_stack[-1][0] is None:
if len(feeds) > 0:
select_stack.append((feeds[0], 0))
print_tree()
else:
cur = select_stack[-1][0]
curi = select_stack[-1][1]
if ('inner' in cur) and is_expanded(cur):
select_stack.append((cur['inner'][0], 0))
print_tree()
else:
backup = select_stack[:]
while len(select_stack) > 1:
par = select_stack[-2][0]
par = feeds if par is None else par['inner']
select_stack.pop()
if curi + 1 < len(par):
select_stack.append((par[curi + 1], curi + 1))
backup = None
print_tree()
break
cur = select_stack[-1][0]
curi = select_stack[-1][1]
if backup is not None:
select_stack[:] = backup
elif buf.endswith('\033[1;5B'):
while select_stack[-1][0] is not None:
cur = select_stack[-1][0]
curi = select_stack[-1][1]
par = select_stack[-2][0]
par = feeds if par is None else par['inner']
if curi + 1 < len(par):
select_stack.pop()
select_stack.append((par[curi + 1], curi + 1))
print_tree()
break
elif select_stack[-2][0] is not None:
select_stack.pop()
else:
break
elif buf.endswith('\033[C'):
if select_stack[-1][0] is None:
if len(feeds) > 0:
select_stack.append((feeds[0], 0))
print_tree()
else:
cur = select_stack[-1][0]
curi = select_stack[-1][1]
if ('inner' in cur) and is_expanded(cur):
select_stack.append((cur['inner'][0], 0))
print_tree()
elif buf.endswith('\033[D'):
if len(select_stack) > 1:
select_stack.pop()
print_tree()
elif buf.endswith('\033[1;5D'):
select_stack[:] = select_stack[:1]
print_tree()
elif buf.endswith(' '):
cur = select_stack[-1][0]
if cur is None:
def expand(feed, value):
global collapsed_count
if 'inner' in feed:
cur_value = is_expanded(feed)
if cur_value != value:
feed['expanded'] = value
collapsed_count += -1 if value else 1
for inner in feed['inner']:
expand(inner, value)
value = collapsed_count != 0
for feed in feeds:
expand(feed, value)
else:
if 'inner' in cur:
value = not is_expanded(cur)
collapsed_count += -1 if value else 1
cur['expanded'] = value
print_tree()
elif buf == 'q':
break
elif buf.endswith('\t'):
print('Tab')
elif buf.endswith('\n'):
print('Enter')
except Exception as err:
raise err
pass
finally:
Popen(['stty', old_stty], stdout = PIPE, stderr = PIPE).communicate()
print('\033[?25h\033[?1049l', end = '')
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