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# Copyright (C) 2015 James E. Blair <corvus@gnu.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 argparse
import sys
import datetime
import time
import urwid
import palette
import client
import slide
import rst
PALETTE = [
('reversed', 'standout', ''),
('status', 'light red', ''),
]
class Row(urwid.Button):
def __init__(self, index, title, console):
super(Row, self).__init__('', on_press=console.jump, user_data=index)
col = urwid.Columns([
('fixed', 3, urwid.Text('%-2i' % (index+1))),
urwid.Text(title),
])
self._w = urwid.AttrMap(col, None, focus_map='reversed')
def selectable(self):
return True
class Footer(urwid.WidgetWrap):
def __init__(self):
super(Footer, self).__init__(urwid.Columns([]))
self.position = urwid.Text(u'')
self.timer = urwid.Text(u'')
self._w.contents.append((self.position, ('pack', None, False)))
self._w.contents.append((urwid.Text(u''), ('weight', 1, False)))
self._w.contents.append((self.timer, ('pack', None, False)))
class Screen(urwid.WidgetWrap):
def __init__(self, console):
super(Screen, self).__init__(urwid.Pile([]))
self.console = console
self.program = []
self.current = -1
self.progressive_state = 0
self.blank_slide = slide.UrwidSlide(
u'', None, urwid.Text(u''), None)
self.timer = 45*60
self.size = (80, 25)
self.timer_end = None
self.listbox = urwid.ListBox(urwid.SimpleFocusListWalker([]))
self.footer = Footer()
footer = urwid.AttrMap(self.footer, 'status')
self.left = urwid.Pile([])
self.left.contents.append((self.listbox, ('weight', 1)))
self.left.set_focus(0)
self.right = urwid.Pile([])
self.setPreviews()
self.main = urwid.Columns([])
self.main.contents.append((self.left, ('weight', 1, False)))
self.main.contents.append((self.right, ('given', self.size[0]+2, False)))
self.main.set_focus(0)
self._w.contents.append((self.main, ('weight', 1)))
self._w.contents.append((footer, ('pack', 1)))
self._w.set_focus(0)
def setPreviews(self):
current_slide = next_slide = self.blank_slide
if 0 <= self.current < len(self.program):
current_slide = self.program[self.current]
if 0 <= self.current+1 < len(self.program):
next_slide = self.program[self.current+1]
current_slide.setProgressive(self.progressive_state)
current_box = urwid.LineBox(current_slide, "Current")
next_box = urwid.LineBox(next_slide, "Next")
if current_slide.handout:
notes_box = urwid.LineBox(current_slide.handout, "Notes")
else:
notes_box = None
self.right.contents[:] = []
self.left.contents[:] = self.left.contents[:1]
cols, rows = self.size
self.right.contents.append((current_box, ('given', rows+2)))
self.right.contents.append((next_box, ('given', rows+2)))
self.right.contents.append((urwid.Filler(urwid.Text(u'')), ('weight', 1)))
if notes_box:
self.left.contents.append((notes_box, ('pack', None)))
def setProgram(self, program):
self.program = program
self.listbox.body[:] = []
for i, s in enumerate(program):
self.listbox.body.append(Row(i, s.title, self.console))
def setSize(self, size):
self.size = size
cols, rows = size
self.right.contents[0] = (self.right.contents[0][0], ('given', rows+2))
self.right.contents[1] = (self.right.contents[1][0], ('given', rows+2))
self.main.contents[1] = (self.main.contents[1][0], ('given', cols+2, False))
# Implement this method from the urwid screen interface for the ScreenHinter
def get_cols_rows(self):
return self.size
def setCurrent(self, state):
index, progressive_state = state
changed = False
if index != self.current:
self.current = index
self.listbox.set_focus(index)
self.listbox._invalidate()
self.footer.position.set_text('%i / %i' % (index+1, len(self.program)))
changed = True
if progressive_state != self.progressive_state:
self.progressive_state = progressive_state
changed = True
if changed:
self.setPreviews()
self.footer.timer.set_text(self.getTime())
def getTime(self):
now = time.time()
if self.timer_end:
return str(datetime.timedelta(seconds=(int(self.timer_end-now))))
else:
return str(datetime.timedelta(seconds=int(self.timer)))
def setTimer(self, secs):
self.timer = secs
if self.timer_end:
now = time.time()
self.timer_end = now + self.timer
def startStopTimer(self):
now = time.time()
if self.timer_end:
remain = max(self.timer_end - int(now), 0)
self.timer = remain
self.timer_end = None
else:
self.timer_end = now + self.timer
def keypress(self, size, key):
if key in (' ', 'x'):
self.startStopTimer()
elif key == 'page up':
self.console.prev()
elif key == 'page down':
self.console.next()
elif key == 'right':
self.console.next()
elif key == 'left':
self.console.prev()
elif key == 't':
self.console.timerDialog()
else:
return super(Screen, self).keypress(size, key)
return None
class FixedButton(urwid.Button):
def sizing(self):
return frozenset([urwid.FIXED])
def pack(self, size, focus=False):
return (len(self.get_label())+4, 1)
class TimerDialog(urwid.WidgetWrap):
signals = ['set', 'cancel']
def __init__(self):
set_button = FixedButton('Set')
cancel_button = FixedButton('Cancel')
urwid.connect_signal(set_button, 'click',
lambda button:self._emit('set'))
urwid.connect_signal(cancel_button, 'click',
lambda button:self._emit('cancel'))
button_widgets = [('pack', set_button),
('pack', cancel_button)]
button_columns = urwid.Columns(button_widgets, dividechars=2)
rows = []
self.entry = urwid.Edit('Timer: ', edit_text='45:00')
rows.append(self.entry)
rows.append(urwid.Divider())
rows.append(button_columns)
pile = urwid.Pile(rows)
fill = urwid.Filler(pile, valign='top')
super(TimerDialog, self).__init__(urwid.LineBox(fill, 'Timer'))
def keypress(self, size, key):
r = super(TimerDialog, self).keypress(size, key)
if r == 'enter':
self._emit('set')
return None
elif r == 'esc':
self._emit('cancel')
return None
return r
class Console(object):
poll_interval = 0.5
def __init__(self, program):
self.screen = Screen(self)
self.loop = urwid.MainLoop(self.screen, palette=PALETTE)
self.client = client.Client()
self.screen.setProgram(program)
self.update()
self.loop.set_alarm_in(self.poll_interval, self.updateCallback)
def run(self):
self.loop.run()
def jump(self, widget, index):
self.screen.setCurrent(self.client.jump(index))
def next(self):
self.screen.setCurrent(self.client.next())
def prev(self):
self.screen.setCurrent(self.client.prev())
def updateCallback(self, loop=None, data=None):
self.update()
self.loop.set_alarm_in(self.poll_interval, self.updateCallback)
def update(self):
self.screen.setSize(self.client.size())
self.screen.setCurrent(self.client.current())
def timerDialog(self):
dialog = TimerDialog()
overlay = urwid.Overlay(dialog, self.loop.widget,
'center', 30,
'middle', 6)
self.loop.widget = overlay
urwid.connect_signal(dialog, 'cancel', self.cancelDialog)
urwid.connect_signal(dialog, 'set', self.setTimer)
def cancelDialog(self, widget):
self.loop.widget = self.screen
def setTimer(self, widget):
parts = widget.entry.edit_text.split(':')
secs = 0
if len(parts):
secs += int(parts.pop())
if len(parts):
secs += int(parts.pop())*60
if len(parts):
secs += int(parts.pop())*60*60
self.screen.setTimer(secs)
self.loop.widget = self.screen
def main():
parser = argparse.ArgumentParser(
description='Console-based presentation system')
parser.add_argument('--light', dest='light',
default=False,
action='store_true',
help='use a black on white palette')
parser.add_argument('file',
help='presentation file (RST)')
args = parser.parse_args()
if args.light:
plt = palette.LIGHT_PALETTE
else:
plt = palette.DARK_PALETTE
hinter = slide.ScreenHinter()
parser = rst.PresentationParser(plt, hinter)
program = parser.parse(open(args.file).read())
c = Console(program)
hinter.setScreen(c.screen)
c.run()
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