# -*- 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 # ############################################################################### """ The :mod:`maindisplay` module provides the functionality to display screens and play multimedia within OpenLP. Some of the code for this form is based on the examples at: * `http://www.steveheffernan.com/html5-video-player/demo-video-player.html`_ * `http://html5demos.com/two-videos`_ """ import cgi import logging from PyQt4 import QtCore, QtGui, QtWebKit, QtOpenGL from PyQt4.phonon import Phonon from openlp.core.common import Registry, RegistryProperties, OpenLPMixin, Settings, translate, is_macosx from openlp.core.lib import ServiceItem, ImageSource, ScreenList, build_html, expand_tags, image_to_byte from openlp.core.lib.theme import BackgroundType from openlp.core.ui import HideMode, AlertLocation log = logging.getLogger(__name__) OPAQUE_STYLESHEET = """ QWidget { border: 0px; margin: 0px; padding: 0px; } QGraphicsView {} """ TRANSPARENT_STYLESHEET = """ QWidget { border: 0px; margin: 0px; padding: 0px; } QGraphicsView { background: transparent; border: 0px; } """ class Display(QtGui.QGraphicsView): """ This is a general display screen class. Here the general display settings will done. It will be used as specialized classes by Main Display and Preview display. """ def __init__(self, parent): """ Constructor """ self.is_live = False if hasattr(parent, 'is_live') and parent.is_live: self.is_live = True if self.is_live: self.parent = lambda: parent super(Display, self).__init__() self.controller = parent self.screen = {} # FIXME: On Mac OS X (tested on 10.7) the display screen is corrupt with # OpenGL. Only white blank screen is shown on the 2nd monitor all the # time. We need to investigate more how to use OpenGL properly on Mac OS # X. if not is_macosx(): self.setViewport(QtOpenGL.QGLWidget()) def setup(self): """ Set up and build the screen base """ self.setGeometry(self.screen['size']) self.web_view = QtWebKit.QWebView(self) self.web_view.setGeometry(0, 0, self.screen['size'].width(), self.screen['size'].height()) self.web_view.settings().setAttribute(QtWebKit.QWebSettings.PluginsEnabled, True) palette = self.web_view.palette() palette.setBrush(QtGui.QPalette.Base, QtCore.Qt.transparent) self.web_view.page().setPalette(palette) self.web_view.setAttribute(QtCore.Qt.WA_OpaquePaintEvent, False) self.page = self.web_view.page() self.frame = self.page.mainFrame() if self.is_live and log.getEffectiveLevel() == logging.DEBUG: self.web_view.settings().setAttribute(QtWebKit.QWebSettings.DeveloperExtrasEnabled, True) self.web_view.loadFinished.connect(self.is_web_loaded) self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff) self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff) self.frame.setScrollBarPolicy(QtCore.Qt.Vertical, QtCore.Qt.ScrollBarAlwaysOff) self.frame.setScrollBarPolicy(QtCore.Qt.Horizontal, QtCore.Qt.ScrollBarAlwaysOff) def resizeEvent(self, event): """ React to resizing of this display :param event: The event to be handled """ self.web_view.setGeometry(0, 0, self.width(), self.height()) def is_web_loaded(self, field=None): """ Called by webView event to show display is fully loaded """ self.web_loaded = True class MainDisplay(OpenLPMixin, Display, RegistryProperties): """ This is the display screen as a specialized class from the Display class """ def __init__(self, parent): """ Constructor """ super(MainDisplay, self).__init__(parent) self.screens = ScreenList() self.rebuild_css = False self.hide_mode = None self.override = {} self.retranslateUi() self.media_object = None if self.is_live: self.audio_player = AudioPlayer(self) else: self.audio_player = None self.first_time = True self.web_loaded = True self.setStyleSheet(OPAQUE_STYLESHEET) window_flags = QtCore.Qt.FramelessWindowHint | QtCore.Qt.Tool | QtCore.Qt.WindowStaysOnTopHint if Settings().value('advanced/x11 bypass wm'): window_flags |= QtCore.Qt.X11BypassWindowManagerHint # TODO: The following combination of window_flags works correctly # on Mac OS X. For next OpenLP version we should test it on other # platforms. For OpenLP 2.0 keep it only for OS X to not cause any # regressions on other platforms. if is_macosx(): window_flags = QtCore.Qt.FramelessWindowHint | QtCore.Qt.Window # For primary screen ensure it stays above the OS X dock # and menu bar if self.screens.current['primary']: self.setWindowState(QtCore.Qt.WindowFullScreen) self.setWindowFlags(window_flags) self.setAttribute(QtCore.Qt.WA_DeleteOnClose) self.set_transparency(False) if self.is_live: Registry().register_function('live_display_hide', self.hide_display) Registry().register_function('live_display_show', self.show_display) Registry().register_function('update_display_css', self.css_changed) def close(self): """ Remove registered function on close. """ if self.is_live: Registry().remove_function('live_display_hide', self.hide_display) Registry().remove_function('live_display_show', self.show_display) Registry().remove_function('update_display_css', self.css_changed) super().close() def set_transparency(self, enabled): """ Set the transparency of the window :param enabled: Is transparency enabled """ if enabled: self.setAutoFillBackground(False) self.setStyleSheet(TRANSPARENT_STYLESHEET) else: self.setAttribute(QtCore.Qt.WA_NoSystemBackground, False) self.setStyleSheet(OPAQUE_STYLESHEET) self.setAttribute(QtCore.Qt.WA_TranslucentBackground, enabled) self.repaint() def css_changed(self): """ We need to rebuild the CSS on the live display. """ for plugin in self.plugin_manager.plugins: plugin.refresh_css(self.frame) def retranslateUi(self): """ Setup the interface translation strings. """ self.setWindowTitle(translate('OpenLP.MainDisplay', 'OpenLP Display')) def setup(self): """ Set up and build the output screen """ self.log_debug('Start MainDisplay setup (live = %s)' % self.is_live) self.screen = self.screens.current self.setVisible(False) Display.setup(self) if self.is_live: # Build the initial frame. background_color = QtGui.QColor() background_color.setNamedColor(Settings().value('advanced/default color')) if not background_color.isValid(): background_color = QtCore.Qt.white image_file = Settings().value('advanced/default image') splash_image = QtGui.QImage(image_file) self.initial_fame = QtGui.QImage( self.screen['size'].width(), self.screen['size'].height(), QtGui.QImage.Format_ARGB32_Premultiplied) painter_image = QtGui.QPainter() painter_image.begin(self.initial_fame) painter_image.fillRect(self.initial_fame.rect(), background_color) painter_image.drawImage( (self.screen['size'].width() - splash_image.width()) // 2, (self.screen['size'].height() - splash_image.height()) // 2, splash_image) service_item = ServiceItem() service_item.bg_image_bytes = image_to_byte(self.initial_fame) self.web_view.setHtml(build_html(service_item, self.screen, self.is_live, None, plugins=self.plugin_manager.plugins)) self._hide_mouse() def text(self, slide, animate=True): """ Add the slide text from slideController :param slide: The slide text to be displayed :param animate: Perform transitions if applicable when setting the text """ # Wait for the webview to update before displaying text. while not self.web_loaded: self.application.process_events() self.setGeometry(self.screen['size']) if animate: self.frame.evaluateJavaScript('show_text("%s")' % slide.replace('\\', '\\\\').replace('\"', '\\\"')) else: # This exists for https://bugs.launchpad.net/openlp/+bug/1016843 # For unknown reasons if evaluateJavaScript is called # from the themewizard, then it causes a crash on # Windows if there are many items in the service to re-render. # Setting the div elements direct seems to solve the issue self.frame.findFirstElement("#lyricsmain").setInnerXml(slide) def alert(self, text, location): """ Display an alert. :param text: The text to be displayed. :param location: Where on the screen is the text to be displayed """ # First we convert <>& marks to html variants, then apply # formattingtags, finally we double all backslashes for JavaScript. text_prepared = expand_tags(cgi.escape(text)).replace('\\', '\\\\').replace('\"', '\\\"') if self.height() != self.screen['size'].height() or not self.isVisible(): shrink = True js = 'show_alert("%s", "%s")' % (text_prepared, 'top') else: shrink = False js = 'show_alert("%s", "")' % text_prepared height = self.frame.evaluateJavaScript(js) if shrink: if text: alert_height = int(height) self.resize(self.width(), alert_height) self.setVisible(True) if location == AlertLocation.Middle: self.move(self.screen['size'].left(), (self.screen['size'].height() - alert_height) // 2) elif location == AlertLocation.Bottom: self.move(self.screen['size'].left(), self.screen['size'].height() - alert_height) else: self.setVisible(False) self.setGeometry(self.screen['size']) def direct_image(self, path, background): """ API for replacement backgrounds so Images are added directly to cache. :param path: Path to Image :param background: The background color """ self.image_manager.add_image(path, ImageSource.ImagePlugin, background) if not hasattr(self, 'service_item'): return False self.override['image'] = path self.override['theme'] = self.service_item.theme_data.background_filename self.image(path) # Update the preview frame. if self.is_live: self.live_controller.update_preview() return True def image(self, path): """ Add an image as the background. The image has already been added to the cache. :param path: The path to the image to be displayed. **Note**, the path is only passed to identify the image. If the image has changed it has to be re-added to the image manager. """ image = self.image_manager.get_image_bytes(path, ImageSource.ImagePlugin) self.controller.media_controller.media_reset(self.controller) self.display_image(image) def display_image(self, image): """ Display an image, as is. :param image: The image to be displayed """ self.setGeometry(self.screen['size']) if image: js = 'show_image("data:image/png;base64,%s");' % image else: js = 'show_image("");' self.frame.evaluateJavaScript(js) def reset_image(self): """ Reset the background image to the service item image. Used after the image plugin has changed the background. """ if hasattr(self, 'service_item'): self.display_image(self.service_item.bg_image_bytes) else: self.display_image(None) # Update the preview frame. if self.is_live: self.live_controller.update_preview() # clear the cache self.override = {} def preview(self): """ Generates a preview of the image displayed. """ was_visible = self.isVisible() self.application.process_events() # We must have a service item to preview. if self.is_live and hasattr(self, 'service_item'): # Wait for the fade to finish before geting the preview. # Important otherwise preview will have incorrect text if at all! if self.service_item.theme_data and self.service_item.theme_data.display_slide_transition: while not self.frame.evaluateJavaScript('show_text_completed()'): self.application.process_events() # Wait for the webview to update before getting the preview. # Important otherwise first preview will miss the background ! while not self.web_loaded: self.application.process_events() # if was hidden keep it hidden if self.is_live: if self.hide_mode: self.hide_display(self.hide_mode) # Only continue if the visibility wasn't changed during method call. elif was_visible == self.isVisible(): # Single screen active if self.screens.display_count == 1: # Only make visible if setting enabled. if Settings().value('core/display on monitor'): self.setVisible(True) else: self.setVisible(True) return QtGui.QPixmap.grabWidget(self) def build_html(self, service_item, image_path=''): """ Store the service_item and build the new HTML from it. Add the HTML to the display :param service_item: The Service item to be used :param image_path: Where the image resides. """ self.web_loaded = False self.initial_fame = None self.service_item = service_item background = None # We have an image override so keep the image till the theme changes. if self.override: # We have an video override so allow it to be stopped. if 'video' in self.override: Registry().execute('video_background_replaced') self.override = {} # We have a different theme. elif self.override['theme'] != service_item.theme_data.background_filename: Registry().execute('live_theme_changed') self.override = {} else: # replace the background background = self.image_manager.get_image_bytes(self.override['image'], ImageSource.ImagePlugin) self.set_transparency(self.service_item.theme_data.background_type == BackgroundType.to_string(BackgroundType.Transparent)) if self.service_item.theme_data.background_filename: self.service_item.bg_image_bytes = self.image_manager.get_image_bytes( self.service_item.theme_data.background_filename, ImageSource.Theme) if image_path: image_bytes = self.image_manager.get_image_bytes(image_path, ImageSource.ImagePlugin) else: image_bytes = None html = build_html(self.service_item, self.screen, self.is_live, background, image_bytes, plugins=self.plugin_manager.plugins) self.web_view.setHtml(html) if service_item.foot_text: self.footer(service_item.foot_text) # if was hidden keep it hidden if self.hide_mode and self.is_live and not service_item.is_media(): if Settings().value('core/auto unblank'): Registry().execute('slidecontroller_live_unblank') else: self.hide_display(self.hide_mode) self._hide_mouse() def footer(self, text): """ Display the Footer :param text: footer text to be displayed """ js = 'show_footer(\'' + text.replace('\\', '\\\\').replace('\'', '\\\'') + '\')' self.frame.evaluateJavaScript(js) def hide_display(self, mode=HideMode.Screen): """ Hide the display by making all layers transparent Store the images so they can be replaced when required :param mode: How the screen is to be hidden """ self.log_debug('hide_display mode = %d' % mode) if self.screens.display_count == 1: # Only make visible if setting enabled. if not Settings().value('core/display on monitor'): return if mode == HideMode.Screen: self.frame.evaluateJavaScript('show_blank("desktop");') self.setVisible(False) elif mode == HideMode.Blank or self.initial_fame: self.frame.evaluateJavaScript('show_blank("black");') else: self.frame.evaluateJavaScript('show_blank("theme");') if mode != HideMode.Screen: if self.isHidden(): self.setVisible(True) self.web_view.setVisible(True) self.hide_mode = mode def show_display(self): """ Show the stored layers so the screen reappears as it was originally. Make the stored images None to release memory. """ if self.screens.display_count == 1: # Only make visible if setting enabled. if not Settings().value('core/display on monitor'): return self.frame.evaluateJavaScript('show_blank("show");') if self.isHidden(): self.setVisible(True) self.hide_mode = None # Trigger actions when display is active again. if self.is_live: Registry().execute('live_display_active') def _hide_mouse(self): """ Hide mouse cursor when moved over display. """ if Settings().value('advanced/hide mouse'): self.setCursor(QtCore.Qt.BlankCursor) self.frame.evaluateJavaScript('document.body.style.cursor = "none"') else: self.setCursor(QtCore.Qt.ArrowCursor) self.frame.evaluateJavaScript('document.body.style.cursor = "auto"') class AudioPlayer(OpenLPMixin, QtCore.QObject): """ This Class will play audio only allowing components to work with a soundtrack independent of the user interface. """ def __init__(self, parent): """ The constructor for the display form. :param parent: The parent widget. """ super(AudioPlayer, self).__init__(parent) self.current_index = -1 self.playlist = [] self.repeat = False self.media_object = Phonon.MediaObject() self.media_object.setTickInterval(100) self.audio_object = Phonon.AudioOutput(Phonon.VideoCategory) Phonon.createPath(self.media_object, self.audio_object) self.media_object.aboutToFinish.connect(self.on_about_to_finish) self.media_object.finished.connect(self.on_finished) def __del__(self): """ Shutting down so clean up connections """ self.stop() for path in self.media_object.outputPaths(): path.disconnect() def on_about_to_finish(self): """ Just before the audio player finishes the current track, queue the next item in the playlist, if there is one. """ self.current_index += 1 if len(self.playlist) > self.current_index: self.media_object.enqueue(self.playlist[self.current_index]) def on_finished(self): """ When the audio track finishes. """ if self.repeat: self.log_debug('Repeat is enabled... here we go again!') self.media_object.clearQueue() self.media_object.clear() self.current_index = -1 self.play() def connectVolumeSlider(self, slider): """ Connect the volume slider to the output channel. """ slider.setAudioOutput(self.audio_object) def reset(self): """ Reset the audio player, clearing the playlist and the queue. """ self.current_index = -1 self.playlist = [] self.stop() self.media_object.clear() def play(self): """ We want to play the file so start it """ if self.current_index == -1: self.on_about_to_finish() self.media_object.play() def pause(self): """ Pause the Audio """ self.media_object.pause() def stop(self): """ Stop the Audio and clean up """ self.media_object.stop() def add_to_playlist(self, file_names): """ Add another file to the playlist. :param file_names: A list with files to be added to the playlist. """ if not isinstance(file_names, list): file_names = [file_names] self.playlist.extend(list(map(Phonon.MediaSource, file_names))) def next(self): """ Skip forward to the next track in the list """ if not self.repeat and self.current_index + 1 >= len(self.playlist): return is_playing = self.media_object.state() == Phonon.PlayingState self.current_index += 1 if self.repeat and self.current_index == len(self.playlist): self.current_index = 0 self.media_object.clearQueue() self.media_object.clear() self.media_object.enqueue(self.playlist[self.current_index]) if is_playing: self.media_object.play() def go_to(self, index): """ Go to a particular track in the list :param index: The track to go to """ is_playing = self.media_object.state() == Phonon.PlayingState self.media_object.clearQueue() self.media_object.clear() self.current_index = index self.media_object.enqueue(self.playlist[self.current_index]) if is_playing: self.media_object.play() def connectSlot(self, signal, slot): """ Connect a slot to a signal on the media object. Used by slidecontroller to connect to audio object. :param slot: The slot the signal is attached to. :param signal: The signal to be fired """ QtCore.QObject.connect(self.media_object, signal, slot)