openlp/openlp/plugins/presentations/lib/messagelistener.py

478 lines
17 KiB
Python

# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
###############################################################################
# OpenLP - Open Source Lyrics Projection #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2015 OpenLP Developers #
# --------------------------------------------------------------------------- #
# 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; version 2 of the License. #
# #
# 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, write to the Free Software Foundation, Inc., 59 #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
###############################################################################
import logging
import copy
import os
from PyQt4 import QtCore
from openlp.core.common import Registry
from openlp.core.ui import HideMode
from openlp.core.lib import ServiceItemContext, ServiceItem
from openlp.plugins.presentations.lib.pdfcontroller import PDF_CONTROLLER_FILETYPES
log = logging.getLogger(__name__)
class Controller(object):
"""
This is the Presentation listener who acts on events from the slide controller and passes the messages on the the
correct presentation handlers.
"""
log.info('Controller loaded')
def __init__(self, live):
"""
Constructor
"""
self.is_live = live
self.doc = None
self.hide_mode = None
log.info('%s controller loaded' % live)
def add_handler(self, controller, file, hide_mode, slide_no):
"""
Add a handler, which is an instance of a presentation and slidecontroller combination. If the slidecontroller
has a display then load the presentation.
"""
log.debug('Live = %s, add_handler %s' % (self.is_live, file))
self.controller = controller
if self.doc is not None:
self.shutdown()
self.doc = self.controller.add_document(file)
if not self.doc.load_presentation():
# Display error message to user
# Inform slidecontroller that the action failed?
return
self.doc.slidenumber = slide_no
self.hide_mode = hide_mode
log.debug('add_handler, slide_number: %d' % slide_no)
if self.is_live:
if hide_mode == HideMode.Screen:
Registry().execute('live_display_hide', HideMode.Screen)
self.stop()
elif hide_mode == HideMode.Theme:
self.blank(hide_mode)
elif hide_mode == HideMode.Blank:
self.blank(hide_mode)
else:
self.doc.start_presentation()
Registry().execute('live_display_hide', HideMode.Screen)
self.doc.slidenumber = 1
if slide_no > 1:
self.slide(slide_no)
def activate(self):
"""
Active the presentation, and show it on the screen. Use the last slide number.
"""
log.debug('Live = %s, activate' % self.is_live)
if not self.doc:
return False
if self.doc.is_active():
return True
if not self.doc.is_loaded():
if not self.doc.load_presentation():
log.warning('Failed to activate %s' % self.doc.file_path)
return False
if self.is_live:
self.doc.start_presentation()
if self.doc.slidenumber > 1:
if self.doc.slidenumber > self.doc.get_slide_count():
self.doc.slidenumber = self.doc.get_slide_count()
self.doc.goto_slide(self.doc.slidenumber)
if self.doc.is_active():
return True
else:
log.warning('Failed to activate %s' % self.doc.file_path)
return False
def slide(self, slide):
"""
Go to a specific slide
"""
log.debug('Live = %s, slide' % self.is_live)
if not self.doc:
return
if not self.is_live:
return
if self.hide_mode:
self.doc.slidenumber = int(slide) + 1
self.poll()
return
if not self.activate():
return
self.doc.goto_slide(int(slide) + 1)
self.poll()
def first(self):
"""
Based on the handler passed at startup triggers the first slide.
"""
log.debug('Live = %s, first' % self.is_live)
if not self.doc:
return
if not self.is_live:
return
if self.hide_mode:
self.doc.slidenumber = 1
self.poll()
return
if not self.activate():
return
self.doc.start_presentation()
self.poll()
def last(self):
"""
Based on the handler passed at startup triggers the last slide.
"""
log.debug('Live = %s, last' % self.is_live)
if not self.doc:
return
if not self.is_live:
return
if self.hide_mode:
self.doc.slidenumber = self.doc.get_slide_count()
self.poll()
return
if not self.activate():
return
self.doc.goto_slide(self.doc.get_slide_count())
self.poll()
def next(self):
"""
Based on the handler passed at startup triggers the next slide event.
"""
log.debug('Live = %s, next' % self.is_live)
if not self.doc:
return
if not self.is_live:
return
if self.hide_mode:
if not self.doc.is_active():
return
if self.doc.slidenumber < self.doc.get_slide_count():
self.doc.slidenumber += 1
self.poll()
return
if not self.activate():
return
# The "End of slideshow" screen is after the last slide. Note, we can't just stop on the last slide, since it
# may contain animations that need to be stepped through.
if self.doc.slidenumber > self.doc.get_slide_count():
return
self.doc.next_step()
self.poll()
def previous(self):
"""
Based on the handler passed at startup triggers the previous slide event.
"""
log.debug('Live = %s, previous' % self.is_live)
if not self.doc:
return
if not self.is_live:
return
if self.hide_mode:
if not self.doc.is_active():
return
if self.doc.slidenumber > 1:
self.doc.slidenumber -= 1
self.poll()
return
if not self.activate():
return
self.doc.previous_step()
self.poll()
def shutdown(self):
"""
Based on the handler passed at startup triggers slide show to shut down.
"""
log.debug('Live = %s, shutdown' % self.is_live)
if not self.doc:
return
self.doc.close_presentation()
self.doc = None
def blank(self, hide_mode):
"""
Instruct the controller to blank the presentation.
"""
log.debug('Live = %s, blank' % self.is_live)
self.hide_mode = hide_mode
if not self.doc:
return
if not self.is_live:
return
if hide_mode == HideMode.Theme:
if not self.doc.is_loaded():
return
if not self.doc.is_active():
return
Registry().execute('live_display_hide', HideMode.Theme)
elif hide_mode == HideMode.Blank:
if not self.activate():
return
self.doc.blank_screen()
def stop(self):
"""
Instruct the controller to stop and hide the presentation.
"""
log.debug('Live = %s, stop' % self.is_live)
# The document has not been loaded yet, so don't do anything. This can happen when going live with a
# presentation while blanked to desktop.
if not self.doc:
return
# Save the current slide number to be able to return to this slide if the presentation is activated again.
if self.doc.is_active():
self.doc.slidenumber = self.doc.get_slide_number()
self.hide_mode = HideMode.Screen
if not self.doc:
return
if not self.is_live:
return
if not self.doc.is_loaded():
return
if not self.doc.is_active():
return
self.doc.stop_presentation()
def unblank(self):
"""
Instruct the controller to unblank the presentation.
"""
log.debug('Live = %s, unblank' % self.is_live)
self.hide_mode = None
if not self.doc:
return
if not self.is_live:
return
if not self.activate():
return
self.doc.unblank_screen()
Registry().execute('live_display_hide', HideMode.Screen)
def poll(self):
if not self.doc:
return
self.doc.poll_slidenumber(self.is_live, self.hide_mode)
class MessageListener(object):
"""
This is the Presentation listener who acts on events from the slide controller and passes the messages on the
correct presentation handlers
"""
log.info('Message Listener loaded')
def __init__(self, media_item):
self.controllers = media_item.controllers
self.media_item = media_item
self.preview_handler = Controller(False)
self.live_handler = Controller(True)
# messages are sent from core.ui.slidecontroller
Registry().register_function('presentations_start', self.startup)
Registry().register_function('presentations_stop', self.shutdown)
Registry().register_function('presentations_hide', self.hide)
Registry().register_function('presentations_first', self.first)
Registry().register_function('presentations_previous', self.previous)
Registry().register_function('presentations_next', self.next)
Registry().register_function('presentations_last', self.last)
Registry().register_function('presentations_slide', self.slide)
Registry().register_function('presentations_blank', self.blank)
Registry().register_function('presentations_unblank', self.unblank)
self.timer = QtCore.QTimer()
self.timer.setInterval(500)
self.timer.timeout.connect(self.timeout)
def startup(self, message):
"""
Start of new presentation. Save the handler as any new presentations start here
"""
log.debug('Startup called with message %s' % message)
is_live = message[1]
item = message[0]
hide_mode = message[2]
file = item.get_frame_path()
self.handler = item.processor
# When starting presentation from the servicemanager we convert
# PDF/XPS/OXPS-serviceitems into image-serviceitems. When started from the mediamanager
# the conversion has already been done at this point.
file_type = os.path.splitext(file.lower())[1][1:]
if file_type in PDF_CONTROLLER_FILETYPES:
log.debug('Converting from pdf/xps/oxps to images for serviceitem with file %s', file)
# Create a copy of the original item, and then clear the original item so it can be filled with images
item_cpy = copy.copy(item)
item.__init__(None)
if is_live:
self.media_item.generate_slide_data(item, item_cpy, False, False, ServiceItemContext.Live, file)
else:
self.media_item.generate_slide_data(item, item_cpy, False, False, ServiceItemContext.Preview, file)
# Some of the original serviceitem attributes is needed in the new serviceitem
item.footer = item_cpy.footer
item.from_service = item_cpy.from_service
item.iconic_representation = item_cpy.iconic_representation
item.image_border = item_cpy.image_border
item.main = item_cpy.main
item.theme_data = item_cpy.theme_data
# When presenting PDF/XPS/OXPS, we are using the image presentation code,
# so handler & processor is set to None, and we skip adding the handler.
self.handler = None
if self.handler == self.media_item.automatic:
self.handler = self.media_item.find_controller_by_type(file)
if not self.handler:
return
else:
# the saved handler is not present so need to use one based on file suffix.
if not self.controllers[self.handler].available:
self.handler = self.media_item.find_controller_by_type(file)
if not self.handler:
return
if is_live:
controller = self.live_handler
else:
controller = self.preview_handler
# When presenting PDF/XPS/OXPS, we are using the image presentation code,
# so handler & processor is set to None, and we skip adding the handler.
if self.handler is None:
self.controller = controller
else:
controller.add_handler(self.controllers[self.handler], file, hide_mode, message[3])
self.timer.start()
def slide(self, message):
"""
React to the message to move to a specific slide.
:param message: The message {1} is_live {2} slide
"""
is_live = message[1]
slide = message[2]
if is_live:
self.live_handler.slide(slide)
else:
self.preview_handler.slide(slide)
def first(self, message):
"""
React to the message to move to the first slide.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.first()
else:
self.preview_handler.first()
def last(self, message):
"""
React to the message to move to the last slide.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.last()
else:
self.preview_handler.last()
def next(self, message):
"""
React to the message to move to the next animation/slide.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.next()
else:
self.preview_handler.next()
def previous(self, message):
"""
React to the message to move to the previous animation/slide.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.previous()
else:
self.preview_handler.previous()
def shutdown(self, message):
"""
React to message to shutdown the presentation. I.e. end the show and close the file.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.shutdown()
self.timer.stop()
else:
self.preview_handler.shutdown()
def hide(self, message):
"""
React to the message to show the desktop.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.stop()
def blank(self, message):
"""
React to the message to blank the display.
:param message: The message {1} is_live {2} slide
"""
is_live = message[1]
hide_mode = message[2]
if is_live:
self.live_handler.blank(hide_mode)
def unblank(self, message):
"""
React to the message to unblank the display.
:param message: The message {1} is_live
"""
is_live = message[1]
if is_live:
self.live_handler.unblank()
def timeout(self):
"""
The presentation may be timed or might be controlled by the application directly, rather than through OpenLP.
Poll occasionally to check which slide is currently displayed so the slidecontroller view can be updated.
"""
self.live_handler.poll()