forked from openlp/openlp
255 lines
8.9 KiB
Python
255 lines
8.9 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2013 Raoul Snyman #
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# Portions copyright (c) 2008-2013 Tim Bentley, Gerald Britton, Jonathan #
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# Corwin, Samuel Findlay, Michael Gorven, Scott Guerrieri, Matthias Hub, #
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# Meinert Jordan, Armin Köhler, Erik Lundin, Edwin Lunando, Brian T. Meyer. #
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# Joshua Miller, Stevan Pettit, Andreas Preikschat, Mattias Põldaru, #
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# Christian Richter, Philip Ridout, Simon Scudder, Jeffrey Smith, #
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# Maikel Stuivenberg, Martin Thompson, Jon Tibble, Dave Warnock, #
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# Frode Woldsund, Martin Zibricky #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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import os
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import logging
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import sys
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if os.name == u'nt':
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from ctypes import cdll
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from ctypes.wintypes import RECT
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from presentationcontroller import PresentationController, PresentationDocument
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log = logging.getLogger(__name__)
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class PptviewController(PresentationController):
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"""
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Class to control interactions with PowerPOint Viewer Presentations
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It creates the runtime Environment , Loads the and Closes the Presentation
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As well as triggering the correct activities based on the users input
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"""
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log.info(u'PPTViewController loaded')
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def __init__(self, plugin):
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"""
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Initialise the class
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"""
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log.debug(u'Initialising')
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self.process = None
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PresentationController.__init__(self, plugin, u'Powerpoint Viewer',
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PptviewDocument)
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self.supports = [u'ppt', u'pps', u'pptx', u'ppsx', u'pptm']
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def check_available(self):
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"""
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PPT Viewer is able to run on this machine
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"""
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log.debug(u'check_available')
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if os.name != u'nt':
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return False
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return self.check_installed()
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if os.name == u'nt':
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def check_installed(self):
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"""
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Check the viewer is installed
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"""
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log.debug(u'Check installed')
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try:
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self.start_process()
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return self.process.CheckInstalled()
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except WindowsError:
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return False
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def start_process(self):
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"""
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Loads the PPTVIEWLIB library
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"""
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if self.process:
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return
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log.debug(u'start PPTView')
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dllpath = os.path.join(self.plugin.pluginManager.basepath,
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u'presentations', u'lib', u'pptviewlib', u'pptviewlib.dll')
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self.process = cdll.LoadLibrary(dllpath)
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if log.isEnabledFor(logging.DEBUG):
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self.process.SetDebug(1)
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def kill(self):
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"""
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Called at system exit to clean up any running presentations
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"""
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log.debug(u'Kill pptviewer')
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while self.docs:
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self.docs[0].close_presentation()
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class PptviewDocument(PresentationDocument):
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"""
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Class which holds information and controls a single presentation
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"""
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def __init__(self, controller, presentation):
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"""
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Constructor, store information about the file and initialise
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"""
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log.debug(u'Init Presentation PowerPoint')
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PresentationDocument.__init__(self, controller, presentation)
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self.presentation = None
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self.pptid = None
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self.blanked = False
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self.hidden = False
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def load_presentation(self):
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"""
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Called when a presentation is added to the SlideController.
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It builds the environment, starts communcations with the background
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PptView task started earlier.
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"""
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log.debug(u'LoadPresentation')
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renderer = self.controller.plugin.renderer
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rect = renderer.screens.current[u'size']
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rect = RECT(rect.x(), rect.y(), rect.right(), rect.bottom())
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file_system_encoding = 'utf-16-le'
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file_path = os.path.normpath(self.filepath)
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preview_path = os.path.join(self.get_temp_folder(), u'slide')
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# Ensure that the paths are null terminated
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file_path = file_path.encode(file_system_encoding) + '\0'
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preview_path = preview_path.encode(file_system_encoding) + '\0'
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if not os.path.isdir(self.get_temp_folder()):
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os.makedirs(self.get_temp_folder())
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self.pptid = self.controller.process.OpenPPT(file_path, None, rect,
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preview_path)
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if self.pptid >= 0:
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self.create_thumbnails()
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self.stop_presentation()
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return True
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else:
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return False
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def create_thumbnails(self):
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"""
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PPTviewLib creates large BMP's, but we want small PNG's for consistency.
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Convert them here.
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"""
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log.debug(u'create_thumbnails')
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if self.check_thumbnails():
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return
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log.debug(u'create_thumbnails proceeding')
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for idx in range(self.get_slide_count()):
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path = u'%s\\slide%s.bmp' % (self.get_temp_folder(),
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unicode(idx + 1))
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self.convert_thumbnail(path, idx + 1)
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def close_presentation(self):
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"""
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Close presentation and clean up objects
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Triggerent by new object being added to SlideController orOpenLP
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being shut down
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"""
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log.debug(u'ClosePresentation')
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if self.controller.process:
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self.controller.process.ClosePPT(self.pptid)
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self.pptid = -1
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self.controller.remove_doc(self)
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def is_loaded(self):
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"""
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Returns true if a presentation is loaded
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"""
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if self.pptid < 0:
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return False
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if self.get_slide_count() < 0:
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return False
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return True
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def is_active(self):
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"""
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Returns true if a presentation is currently active
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"""
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return self.is_loaded() and not self.hidden
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def blank_screen(self):
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"""
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Blanks the screen
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"""
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self.controller.process.Blank(self.pptid)
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self.blanked = True
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def unblank_screen(self):
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"""
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Unblanks (restores) the presentationn
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"""
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self.controller.process.Unblank(self.pptid)
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self.blanked = False
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def is_blank(self):
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"""
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Returns true if screen is blank
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"""
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log.debug(u'is blank OpenOffice')
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return self.blanked
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def stop_presentation(self):
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"""
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Stops the current presentation and hides the output
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"""
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self.hidden = True
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self.controller.process.Stop(self.pptid)
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def start_presentation(self):
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"""
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Starts a presentation from the beginning
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"""
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if self.hidden:
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self.hidden = False
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self.controller.process.Resume(self.pptid)
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else:
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self.controller.process.RestartShow(self.pptid)
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def get_slide_number(self):
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"""
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Returns the current slide number
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"""
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return self.controller.process.GetCurrentSlide(self.pptid)
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def get_slide_count(self):
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"""
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Returns total number of slides
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"""
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return self.controller.process.GetSlideCount(self.pptid)
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def goto_slide(self, slideno):
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"""
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Moves to a specific slide in the presentation
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"""
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self.controller.process.GotoSlide(self.pptid, slideno)
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def next_step(self):
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"""
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Triggers the next effect of slide on the running presentation
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"""
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self.controller.process.NextStep(self.pptid)
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def previous_step(self):
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"""
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Triggers the previous slide on the running presentation
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"""
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self.controller.process.PrevStep(self.pptid)
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