Merge lp:~openlp-dev/openlp/webengine-migrate into lp:openlp

[Tim Bentley]

Migration from WebKit to Webengine. Also introduced reveal.js for slide rendering, new screen setup dialogs and many other changes.

[Raoul Snyman (raoul-snyman)]

Linux tests failed, please see https://ci.openlp.io/job/MP-02-Linux_Tests/73/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests failed, please see https://ci.openlp.io/job/MP-02-Linux_Tests/75/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests failed, please see https://ci.openlp.io/job/MP-02-Linux_Tests/76/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests failed, please see https://ci.openlp.io/job/MP-02-Linux_Tests/77/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests passed!

[Raoul Snyman (raoul-snyman)]

Linting failed, please see https://ci.openlp.io/job/MP-03-Linting/31/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests passed!

[Raoul Snyman (raoul-snyman)]

Linting failed, please see https://ci.openlp.io/job/MP-03-Linting/32/ for more details

[Raoul Snyman (raoul-snyman)]

Linux tests passed!

[Raoul Snyman (raoul-snyman)]

Linting failed, please see https://ci.openlp.io/job/MP-03-Linting/33/ for more details

[lp:~openlp-dev/openlp/webengine-migrate]

2883. By Raoul Snyman on 2019-02-13

Fix an unused import and some incorrect patch()s

2884. By Raoul Snyman on 2019-02-13

HEAD

[Raoul Snyman (raoul-snyman)]

Linux tests failed, please see https://ci.openlp.io/job/MP-02-Linux_Tests/81/ for more details

[lp:~openlp-dev/openlp/webengine-migrate]

2885. By Tomas Groth on 2019-02-26

trunk

Unmerged revisions

2885. By Tomas Groth on 2019-02-26

trunk

=== modified file '.bzrignore'
--- .bzrignore	2018-06-26 17:10:34 +0000
+++ .bzrignore	2019-02-13 21:39:24 +0000
@@ -45,4 +45,11 @@
 resources/windows/warnOpenLP.txt
 *.ropeproject
 tags
+output
+htmlcov
+node_modules
+openlp-test-projectordb.sqlite
+package-lock.json
+.cache
+test
 tests.kdev4

=== added file 'karma.conf.js'
--- karma.conf.js	1970-01-01 00:00:00 +0000
+++ karma.conf.js	2019-02-13 21:39:24 +0000
@@ -0,0 +1,77 @@
+module.exports = function(config) {
+  config.set({
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: "",
+
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ["jasmine"],
+
+    // list of files / patterns to load in the browser
+    files: [
+      "tests/js/polyfill.js",
+      "tests/js/fake_webchannel.js",
+      "openlp/core/display/html/reveal.js",
+      "openlp/core/display/html/display.js",
+      "tests/js/test_*.js"
+    ],
+
+    // list of files to exclude
+    exclude: [
+    ],
+
+    // preprocess matching files before serving them to the browser
+    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
+    preprocessors: {
+      // source files, that you wanna generate coverage for 
+      // do not include tests or libraries 
+      // (these files will be instrumented by Istanbul) 
+      "display.js": ["coverage"]
+    },
+
+    // test results reporter to use
+    // possible values: "dots", "progress"
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ["progress", "coverage"],
+
+    // configure the coverateReporter 
+    coverageReporter: {
+      type : "html",
+      dir : "htmlcov/"
+    },
+
+    // web server port
+    port: 9876,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_DEBUG,
+
+    // loggers
+    /* loggers: [
+        {"type": "file", "filename": "karma.log"}
+    ],*/
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+    // start these browsers
+    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
+    browsers: ["PhantomJS"],
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: false,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: Infinity,
+
+    client: {
+        captureConsole: true
+    }
+  })
+}

=== modified file 'nose2.cfg'
--- nose2.cfg	2017-11-16 05:03:19 +0000
+++ nose2.cfg	2019-02-13 21:39:24 +0000
@@ -1,5 +1,5 @@
 [unittest]
-verbose = True
+verbose = true
 plugins = nose2.plugins.mp
 
 [log-capture]
@@ -9,19 +9,19 @@
 log-level = ERROR
 
 [test-result]
-always-on = True
-descriptions = True
+always-on = true
+descriptions = true
 
 [coverage]
-always-on = True
+always-on = true
 coverage = openlp
 coverage-report = html
 
 [multiprocess]
-always-on = False
+always-on = false
 processes = 4
 
 [output-buffer]
-always-on = True
-stderr = True
-stdout = False
+always-on = true
+stderr = true
+stdout = true

=== modified file 'openlp/.version'
--- openlp/.version	2019-01-11 20:23:24 +0000
+++ openlp/.version	2019-02-13 21:39:24 +0000
@@ -1,1 +1,1 @@
-2.9.0
+2.5.dev2856
\ No newline at end of file

=== modified file 'openlp/core/api/deploy.py'
--- openlp/core/api/deploy.py	2018-01-04 07:00:55 +0000
+++ openlp/core/api/deploy.py	2019-02-13 21:39:24 +0000
@@ -25,7 +25,7 @@
 from zipfile import ZipFile
 
 from openlp.core.common.applocation import AppLocation
-from openlp.core.common.httputils import download_file, get_web_page, get_url_file_size
+from openlp.core.common.httputils import download_file, get_url_file_size, get_web_page
 from openlp.core.common.registry import Registry
 
 

=== modified file 'openlp/core/api/endpoint/controller.py'
--- openlp/core/api/endpoint/controller.py	2018-08-25 14:08:19 +0000
+++ openlp/core/api/endpoint/controller.py	2019-02-13 21:39:24 +0000
@@ -34,6 +34,7 @@
 from openlp.core.lib import create_thumb
 from openlp.core.lib.serviceitem import ItemCapabilities
 
+
 log = logging.getLogger(__name__)
 
 controller_endpoint = Endpoint('controller')
@@ -48,7 +49,7 @@
 
     :param request: the http request - not used
     """
-    log.debug("controller_text ")
+    log.debug('controller_text')
     live_controller = Registry().get('live_controller')
     current_item = live_controller.service_item
     data = []
@@ -57,13 +58,14 @@
             item = {}
             # Handle text (songs, custom, bibles)
             if current_item.is_text():
-                if frame['verseTag']:
-                    item['tag'] = str(frame['verseTag'])
+                if frame['verse']:
+                    item['tag'] = str(frame['verse'])
                 else:
                     item['tag'] = str(index + 1)
-                item['chords_text'] = str(frame['chords_text'])
-                item['text'] = str(frame['text'])
-                item['html'] = str(frame['html'])
+                # TODO: Figure out rendering chords
+                item['chords_text'] = str(frame.get('chords_text', ''))
+                item['text'] = frame['text']
+                item['html'] = current_item.get_rendered_frame(index)
             # Handle images, unless a custom thumbnail is given or if thumbnails is disabled
             elif current_item.is_image() and not frame.get('image', '') and Settings().value('api/thumbnails'):
                 item['tag'] = str(index + 1)

=== modified file 'openlp/core/api/endpoint/core.py'
--- openlp/core/api/endpoint/core.py	2018-08-25 14:08:19 +0000
+++ openlp/core/api/endpoint/core.py	2019-02-13 21:39:24 +0000
@@ -30,8 +30,8 @@
 from openlp.core.common.i18n import UiStrings, translate
 from openlp.core.common.registry import Registry
 from openlp.core.lib import image_to_byte
-from openlp.core.lib.plugin import StringContent
-from openlp.core.lib.plugin import PluginStatus
+from openlp.core.lib.plugin import PluginStatus, StringContent
+
 
 template_dir = 'templates'
 static_dir = 'static'

=== modified file 'openlp/core/api/endpoint/remote.py'
--- openlp/core/api/endpoint/remote.py	2017-12-29 09:15:48 +0000
+++ openlp/core/api/endpoint/remote.py	2019-02-13 21:39:24 +0000
@@ -24,6 +24,7 @@
 from openlp.core.api.endpoint.core import TRANSLATED_STRINGS
 from openlp.core.api.http.endpoint import Endpoint
 
+
 log = logging.getLogger(__name__)
 
 remote_endpoint = Endpoint('remote', template_dir='remotes')

=== modified file 'openlp/core/api/endpoint/service.py'
--- openlp/core/api/endpoint/service.py	2017-12-29 09:15:48 +0000
+++ openlp/core/api/endpoint/service.py	2019-02-13 21:39:24 +0000
@@ -26,6 +26,7 @@
 from openlp.core.api.http.endpoint import Endpoint
 from openlp.core.common.registry import Registry
 
+
 log = logging.getLogger(__name__)
 
 service_endpoint = Endpoint('service')

=== modified file 'openlp/core/api/http/server.py'
--- openlp/core/api/http/server.py	2018-01-07 04:36:45 +0000
+++ openlp/core/api/http/server.py	2019-02-13 21:39:24 +0000
@@ -30,22 +30,21 @@
 from waitress.server import create_server
 
 from openlp.core.api.deploy import download_and_check, download_sha256
-from openlp.core.api.endpoint.controller import controller_endpoint, api_controller_endpoint
-from openlp.core.api.endpoint.core import chords_endpoint, stage_endpoint, blank_endpoint, main_endpoint
+from openlp.core.api.endpoint.controller import api_controller_endpoint, controller_endpoint
+from openlp.core.api.endpoint.core import blank_endpoint, chords_endpoint, main_endpoint, stage_endpoint
 from openlp.core.api.endpoint.remote import remote_endpoint
-from openlp.core.api.endpoint.service import service_endpoint, api_service_endpoint
-from openlp.core.api.http import application
-from openlp.core.api.http import register_endpoint
+from openlp.core.api.endpoint.service import api_service_endpoint, service_endpoint
+from openlp.core.api.http import application, register_endpoint
 from openlp.core.api.poll import Poller
 from openlp.core.common.applocation import AppLocation
-from openlp.core.common.i18n import UiStrings
-from openlp.core.common.i18n import translate
+from openlp.core.common.i18n import UiStrings, translate
 from openlp.core.common.mixins import LogMixin, RegistryProperties
 from openlp.core.common.path import create_paths
 from openlp.core.common.registry import Registry, RegistryBase
 from openlp.core.common.settings import Settings
 from openlp.core.threading import ThreadWorker, run_thread
 
+
 log = logging.getLogger(__name__)
 
 

=== modified file 'openlp/core/api/http/wsgiapp.py'
--- openlp/core/api/http/wsgiapp.py	2018-07-04 20:42:55 +0000
+++ openlp/core/api/http/wsgiapp.py	2019-02-13 21:39:24 +0000
@@ -33,6 +33,7 @@
 from openlp.core.api.http.errors import HttpError, NotFound, ServerError
 from openlp.core.common.applocation import AppLocation
 
+
 ARGS_REGEX = re.compile(r'''\{(\w+)(?::([^}]+))?\}''', re.VERBOSE)
 
 log = logging.getLogger(__name__)

=== modified file 'openlp/core/api/tab.py'
--- openlp/core/api/tab.py	2018-08-25 14:08:19 +0000
+++ openlp/core/api/tab.py	2019-02-13 21:39:24 +0000
@@ -31,6 +31,7 @@
 from openlp.core.lib.settingstab import SettingsTab
 from openlp.core.ui.icons import UiIcons
 
+
 ZERO_URL = '0.0.0.0'
 
 
@@ -43,9 +44,9 @@
         advanced_translated = translate('OpenLP.AdvancedTab', 'Advanced')
         super(ApiTab, self).__init__(parent, 'api', advanced_translated)
 
-    def setupUi(self):
+    def setup_ui(self):
         self.setObjectName('ApiTab')
-        super(ApiTab, self).setupUi()
+        super(ApiTab, self).setup_ui()
         self.server_settings_group_box = QtWidgets.QGroupBox(self.left_column)
         self.server_settings_group_box.setObjectName('server_settings_group_box')
         self.server_settings_layout = QtWidgets.QFormLayout(self.server_settings_group_box)
@@ -154,7 +155,7 @@
         self.thumbnails_check_box.stateChanged.connect(self.on_thumbnails_check_box_changed)
         self.address_edit.textChanged.connect(self.set_urls)
 
-    def retranslateUi(self):
+    def retranslate_ui(self):
         self.tab_title_visible = translate('RemotePlugin.RemoteTab', 'Remote Interface')
         self.server_settings_group_box.setTitle(translate('RemotePlugin.RemoteTab', 'Server Settings'))
         self.address_label.setText(translate('RemotePlugin.RemoteTab', 'Serve on IP address:'))

=== modified file 'openlp/core/api/websockets.py'
--- openlp/core/api/websockets.py	2018-01-07 17:50:29 +0000
+++ openlp/core/api/websockets.py	2019-02-13 21:39:24 +0000
@@ -35,6 +35,7 @@
 from openlp.core.common.settings import Settings
 from openlp.core.threading import ThreadWorker, run_thread
 
+
 log = logging.getLogger(__name__)
 
 

=== modified file 'openlp/core/app.py'
--- openlp/core/app.py	2018-10-25 16:38:39 +0000
+++ openlp/core/app.py	2019-02-13 21:39:24 +0000
@@ -33,27 +33,28 @@
 from datetime import datetime
 from traceback import format_exception
 
-from PyQt5 import QtCore, QtWidgets
+from PyQt5 import QtCore, QtWebEngineWidgets, QtWidgets  # noqa
 
 from openlp.core.state import State
 from openlp.core.common import is_macosx, is_win
 from openlp.core.common.applocation import AppLocation
 from openlp.core.loader import loader
 from openlp.core.common.i18n import LanguageManager, UiStrings, translate
-from openlp.core.common.path import create_paths, copytree
+from openlp.core.common.path import copytree, create_paths
 from openlp.core.common.registry import Registry
 from openlp.core.common.settings import Settings
 from openlp.core.display.screens import ScreenList
 from openlp.core.resources import qInitResources
-from openlp.core.ui.splashscreen import SplashScreen
+from openlp.core.server import Server
 from openlp.core.ui.exceptionform import ExceptionForm
 from openlp.core.ui.firsttimeform import FirstTimeForm
 from openlp.core.ui.firsttimelanguageform import FirstTimeLanguageForm
 from openlp.core.ui.mainwindow import MainWindow
+from openlp.core.ui.splashscreen import SplashScreen
 from openlp.core.ui.style import get_application_stylesheet
-from openlp.core.server import Server
 from openlp.core.version import check_for_update, get_version
 
+
 __all__ = ['OpenLP', 'main']
 
 
@@ -74,7 +75,8 @@
         """
         self.is_event_loop_active = True
         result = QtWidgets.QApplication.exec()
-        self.server.close_server()
+        if hasattr(self, 'server'):
+            self.server.close_server()
         return result
 
     def run(self, args):
@@ -317,7 +319,7 @@
     file_path = log_path / 'openlp.log'
     # TODO: FileHandler accepts a Path object in Py3.6
     logfile = logging.FileHandler(str(file_path), 'w', encoding='UTF-8')
-    logfile.setFormatter(logging.Formatter('%(asctime)s %(name)-55s %(levelname)-8s %(message)s'))
+    logfile.setFormatter(logging.Formatter('%(asctime)s %(threadName)s %(name)-55s %(levelname)-8s %(message)s'))
     log.addHandler(logfile)
     if log.isEnabledFor(logging.DEBUG):
         print('Logging to: {name}'.format(name=file_path))
@@ -330,7 +332,8 @@
     :param args: Some args
     """
     args = parse_options(args)
-    qt_args = []
+    qt_args = ['--disable-web-security']
+    # qt_args = []
     if args and args.loglevel.lower() in ['d', 'debug']:
         log.setLevel(logging.DEBUG)
     elif args and args.loglevel.lower() in ['w', 'warning']:

=== modified file 'openlp/core/common/actions.py'
--- openlp/core/common/actions.py	2018-10-13 10:24:01 +0000
+++ openlp/core/common/actions.py	2019-02-13 21:39:24 +0000
@@ -29,6 +29,7 @@
 
 from openlp.core.common.settings import Settings
 
+
 log = logging.getLogger(__name__)
 
 
@@ -113,7 +114,6 @@
             if item[1] == action:
                 self.actions.remove(item)
                 return
-        log.warning('Action "{action}" does not exist.'.format(action=action))
 
 
 class CategoryList(object):

=== modified file 'openlp/core/common/applocation.py'
--- openlp/core/common/applocation.py	2018-10-07 23:34:00 +0000
+++ openlp/core/common/applocation.py	2019-02-13 21:39:24 +0000
@@ -29,10 +29,11 @@
 import appdirs
 
 import openlp
-from openlp.core.common import get_frozen_path, is_win, is_macosx
+from openlp.core.common import get_frozen_path, is_macosx, is_win
 from openlp.core.common.path import Path, create_paths
 from openlp.core.common.settings import Settings
 
+
 log = logging.getLogger(__name__)
 
 FROZEN_APP_PATH = Path(sys.argv[0]).parent

=== modified file 'openlp/core/common/db.py'
--- openlp/core/common/db.py	2017-12-29 09:15:48 +0000
+++ openlp/core/common/db.py	2019-02-13 21:39:24 +0000
@@ -27,6 +27,7 @@
 
 import sqlalchemy
 
+
 log = logging.getLogger(__name__)
 
 

=== modified file 'openlp/core/common/httputils.py'
--- openlp/core/common/httputils.py	2018-06-08 20:55:20 +0000
+++ openlp/core/common/httputils.py	2019-02-13 21:39:24 +0000
@@ -34,6 +34,7 @@
 from openlp.core.common.registry import Registry
 from openlp.core.common.settings import ProxyMode, Settings
 
+
 log = logging.getLogger(__name__ + '.__init__')
 
 USER_AGENTS = {

=== modified file 'openlp/core/common/i18n.py'
--- openlp/core/common/i18n.py	2018-10-27 11:05:41 +0000
+++ openlp/core/common/i18n.py	2019-02-13 21:39:24 +0000
@@ -29,10 +29,11 @@
 
 from PyQt5 import QtCore, QtWidgets
 
-from openlp.core.common import is_win, is_macosx
+from openlp.core.common import is_macosx, is_win
 from openlp.core.common.applocation import AppLocation
 from openlp.core.common.settings import Settings
 
+
 log = logging.getLogger(__name__)
 
 

=== modified file 'openlp/core/common/mixins.py'
--- openlp/core/common/mixins.py	2018-11-18 17:29:47 +0000
+++ openlp/core/common/mixins.py	2019-02-13 21:39:24 +0000
@@ -28,6 +28,7 @@
 from openlp.core.common import is_win, trace_error_handler
 from openlp.core.common.registry import Registry
 
+
 DO_NOT_TRACE_EVENTS = ['timerEvent', 'paintEvent', 'drag_enter_event', 'drop_event', 'on_controller_size_changed',
                        'preview_size_changed', 'resizeEvent']
 

=== modified file 'openlp/core/common/path.py'
--- openlp/core/common/path.py	2018-08-12 11:14:47 +0000
+++ openlp/core/common/path.py	2019-02-13 21:39:24 +0000
@@ -25,6 +25,7 @@
 
 from openlp.core.common import is_win
 
+
 if is_win():
     from pathlib import WindowsPath as PathVariant          # pragma: nocover
 else:

=== modified file 'openlp/core/common/registry.py'
--- openlp/core/common/registry.py	2018-10-25 16:38:39 +0000
+++ openlp/core/common/registry.py	2019-02-13 21:39:24 +0000
@@ -27,6 +27,7 @@
 
 from openlp.core.common import de_hump, trace_error_handler
 
+
 log = logging.getLogger(__name__)
 
 
@@ -143,6 +144,7 @@
         if event in self.functions_list:
             for function in self.functions_list[event]:
                 try:
+                    log.debug('Running function {} for {}'.format(function, event))
                     result = function(*args, **kwargs)
                     if result:
                         results.append(result)

=== modified file 'openlp/core/common/settings.py'
--- openlp/core/common/settings.py	2018-10-24 19:35:22 +0000
+++ openlp/core/common/settings.py	2019-02-13 21:39:24 +0000
@@ -33,7 +33,8 @@
 
 from openlp.core.common import SlideLimits, ThemeLevel, is_linux, is_win
 from openlp.core.common.json import OpenLPJsonDecoder, OpenLPJsonEncoder
-from openlp.core.common.path import Path, str_to_path, files_to_paths
+from openlp.core.common.path import Path, files_to_paths, str_to_path
+
 
 log = logging.getLogger(__name__)
 
@@ -70,6 +71,34 @@
     return string
 
 
+def upgrade_screens(number, x_position, y_position, height, width, can_override, is_display_screen):
+    """
+    Upgrade them monitor setting from a few single entries to a composite JSON entry
+
+    :param int number: The old monitor number
+    :param int x_position: The X position
+    :param int y_position: The Y position
+    :param bool can_override: Are the screen positions overridden
+    :param bool is_display_screen: Is this a display screen
+    :returns dict: Dictionary with the new value
+    """
+    geometry_key = 'geometry'
+    if can_override:
+        geometry_key = 'custom_geometry'
+    return {
+        number: {
+            'number': number,
+            geometry_key: {
+                'x': x_position,
+                'y': y_position,
+                'height': height,
+                'width': width
+            },
+            'is_display': is_display_screen
+        }
+    }
+
+
 class Settings(QtCore.QSettings):
     """
     Class to wrap QSettings.
@@ -175,6 +204,7 @@
         # circular dependency.
         'core/display on monitor': True,
         'core/override position': False,
+        'core/monitor': {},
         'core/application version': '0.0',
         'images/background color': '#000000',
         'media/players': 'system,webkit',
@@ -276,6 +306,8 @@
         ('songuasge/db hostname', 'songusage/db hostname', []),
         ('songuasge/db database', 'songusage/db database', []),
         ('presentations / Powerpoint Viewer', '', []),
+        (['core/monitor', 'core/x position', 'core/y position', 'core/height', 'core/width', 'core/override',
+          'core/display on monitor'], 'core/screens', [(upgrade_screens, [1, 0, 0, None, None, False, False])]),
         ('bibles/proxy name', '', []),  # Just remove these bible proxy settings. They weren't used in 2.4!
         ('bibles/proxy address', '', []),
         ('bibles/proxy username', '', []),
@@ -545,7 +577,7 @@
         :param value: The value to save
         :rtype: None
         """
-        if isinstance(value, Path) or (isinstance(value, list) and value and isinstance(value[0], Path)):
+        if isinstance(value, (Path, dict)) or (isinstance(value, list) and value and isinstance(value[0], Path)):
             value = json.dumps(value, cls=OpenLPJsonEncoder)
         super().setValue(key, value)
 
@@ -568,8 +600,11 @@
             # An empty list saved to the settings results in a None type being returned.
             elif isinstance(default_value, list):
                 return []
+            # An empty dictionary saved to the settings results in a None type being returned.
+            elif isinstance(default_value, dict):
+                return {}
         elif isinstance(setting, str):
-            if '__Path__' in setting:
+            if '__Path__' in setting or setting.startswith('{'):
                 return json.loads(setting, cls=OpenLPJsonDecoder)
         # Convert the setting to the correct type.
         if isinstance(default_value, bool):
@@ -578,6 +613,8 @@
             # Sometimes setting is string instead of a boolean.
             return setting == 'true'
         if isinstance(default_value, int):
+            if setting is None:
+                return 0
             return int(setting)
         return setting
 

=== added directory 'openlp/core/display/html'
=== added file 'openlp/core/display/html/black.css'
--- openlp/core/display/html/black.css	1970-01-01 00:00:00 +0000
+++ openlp/core/display/html/black.css	2019-02-13 21:39:24 +0000
@@ -0,0 +1,292 @@
+/**
+ * Black theme for reveal.js. This is the opposite of the 'white' theme.
+ *
+ * By Hakim El Hattab, http://hakim.se
+ */
+@import url(../../lib/font/source-sans-pro/source-sans-pro.css);
+section.has-light-background, section.has-light-background h1, section.has-light-background h2, section.has-light-background h3, section.has-light-background h4, section.has-light-background h5, section.has-light-background h6 {
+  color: #222; }
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+body {
+  background: #222;
+  background-color: #222; }
+
+.reveal {
+  font-family: "Source Sans Pro", Helvetica, sans-serif;
+  font-size: 42px;
+  font-weight: normal;
+  color: #fff; }
+
+::selection {
+  color: #fff;
+  background: #bee4fd;
+  text-shadow: none; }
+
+::-moz-selection {
+  color: #fff;
+  background: #bee4fd;
+  text-shadow: none; }
+
+.reveal .slides > section,
+.reveal .slides > section > section {
+  line-height: 1.3;
+  font-weight: inherit; }
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: 0 0 20px 0;
+  color: #fff;
+  font-family: "Source Sans Pro", Helvetica, sans-serif;
+  font-weight: 600;
+  line-height: 1.2;
+  letter-spacing: normal;
+  text-transform: uppercase;
+  text-shadow: none;
+  word-wrap: break-word; }
+
+.reveal h1 {
+  font-size: 2.5em; }
+
+.reveal h2 {
+  font-size: 1.6em; }
+
+.reveal h3 {
+  font-size: 1.3em; }
+
+.reveal h4 {
+  font-size: 1em; }
+
+.reveal h1 {
+  text-shadow: none; }
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: 20px 0;
+  line-height: 1.3; }
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%; }
+
+.reveal strong,
+.reveal b {
+  font-weight: bold; }
+
+.reveal em {
+  font-style: italic; }
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em; }
+
+.reveal ol {
+  list-style-type: decimal; }
+
+.reveal ul {
+  list-style-type: disc; }
+
+.reveal ul ul {
+  list-style-type: square; }
+
+.reveal ul ul ul {
+  list-style-type: circle; }
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px; }
+
+.reveal dt {
+  font-weight: bold; }
+
+.reveal dd {
+  margin-left: 40px; }
+
+.reveal q,
+.reveal blockquote {
+  quotes: none; }
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: 20px auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block; }
+
+.reveal q {
+  font-style: italic; }
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: 20px auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: monospace;
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+
+.reveal code {
+  font-family: monospace; }
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal; }
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0; }
+
+.reveal table th {
+  font-weight: bold; }
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid; }
+
+.reveal table th[align="center"],
+.reveal table td[align="center"] {
+  text-align: center; }
+
+.reveal table th[align="right"],
+.reveal table td[align="right"] {
+  text-align: right; }
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none; }
+
+.reveal sup {
+  vertical-align: super; }
+
+.reveal sub {
+  vertical-align: sub; }
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top; }
+
+.reveal small * {
+  vertical-align: top; }
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: #42affa;
+  text-decoration: none;
+  -webkit-transition: color .15s ease;
+  -moz-transition: color .15s ease;
+  transition: color .15s ease; }
+
+.reveal a:hover {
+  color: #8dcffc;
+  text-shadow: none;
+  border: none; }
+
+.reveal .roll span:after {
+  color: #fff;
+  background: #068de9; }
+
+/*********************************************
+ * IMAGES
+ *********************************************/
+.reveal section img {
+  margin: 15px 0px;
+  background: rgba(255, 255, 255, 0.12);
+  border: 4px solid #fff;
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
+.reveal a img {
+  -webkit-transition: all .15s linear;
+  -moz-transition: all .15s linear;
+  transition: all .15s linear; }
+
+.reveal a:hover img {
+  background: rgba(255, 255, 255, 0.2);
+  border-color: #42affa;
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls .navigate-left,
+.reveal .controls .navigate-left.enabled {
+  border-right-color: #42affa; }
+
+.reveal .controls .navigate-right,
+.reveal .controls .navigate-right.enabled {
+  border-left-color: #42affa; }
+
+.reveal .controls .navigate-up,
+.reveal .controls .navigate-up.enabled {
+  border-bottom-color: #42affa; }
+
+.reveal .controls .navigate-down,
+.reveal .controls .navigate-down.enabled {
+  border-top-color: #42affa; }
+
+.reveal .controls .navigate-left.enabled:hover {
+  border-right-color: #8dcffc; }
+
+.reveal .controls .navigate-right.enabled:hover {
+  border-left-color: #8dcffc; }
+
+.reveal .controls .navigate-up.enabled:hover {
+  border-bottom-color: #8dcffc; }
+
+.reveal .controls .navigate-down.enabled:hover {
+  border-top-color: #8dcffc; }
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2); }
+
+.reveal .progress span {
+  background: #42affa;
+  -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+  -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }

=== added file 'openlp/core/display/html/checkerboard.png'
Binary files openlp/core/display/html/checkerboard.png	1970-01-01 00:00:00 +0000 and openlp/core/display/html/checkerboard.png	2019-02-13 21:39:24 +0000 differ
=== added file 'openlp/core/display/html/display.html'
--- openlp/core/display/html/display.html	1970-01-01 00:00:00 +0000
+++ openlp/core/display/html/display.html	2019-02-13 21:39:24 +0000
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Display Window</title>
+    <link href="reveal.css" rel="stylesheet">
+    <style type="text/css">
+    body {
+      background: transparent !important;
+      color: #fff !important;
+    }
+    sup {
+      vertical-align: super !important;
+      font-size: smaller !important;
+    }
+    .reveal .slides > section,
+    .reveal .slides > section > section {
+      padding: 0;
+    }
+    .reveal > .backgrounds > .present {
+      visibility: hidden !important;
+    }
+    #global-background {
+      display: block;
+      visibility: visible;
+      z-index: -1;
+    }
+    </style>
+    <script type="text/javascript" src="qrc:///qtwebchannel/qwebchannel.js"></script>
+    <script type="text/javascript" src="reveal.js"></script>
+    <script type="text/javascript" src="display.js"></script>
+  </head>
+  <body>
+    <div class="reveal">
+      <div id="global-background" class="slide-background present" data-loaded="true"></div>
+      <div class="slides"></div>
+      <div class="footer"></div>
+    </div>
+  </body>
+</html>

=== added file 'openlp/core/display/html/display.js'
--- openlp/core/display/html/display.js	1970-01-01 00:00:00 +0000
+++ openlp/core/display/html/display.js	2019-02-13 21:39:24 +0000
@@ -0,0 +1,789 @@
+/**
+ * display.js is the main Javascript file that is used to drive the display.
+ */
+
+/**
+ * Background type enumeration
+ */
+var BackgroundType = {
+  Transparent: "transparent",
+  Solid: "solid",
+  Gradient: "gradient",
+  Video: "video",
+  Image: "image"
+};
+
+/**
+ * Gradient type enumeration
+ */
+var GradientType = {
+  Horizontal: "horizontal",
+  LeftTop: "leftTop",
+  LeftBottom: "leftBottom",
+  Vertical: "vertical",
+  Circular: "circular"
+};
+
+/**
+ * Horizontal alignment enumeration
+ */
+var HorizontalAlign = {
+  Left: "left",
+  Right: "right",
+  Center: "center",
+  Justify: "justify"
+};
+
+/**
+ * Vertical alignment enumeration
+ */
+var VerticalAlign = {
+  Top: "top",
+  Middle: "middle",
+  Bottom: "bottom"
+};
+
+/**
+ * Audio state enumeration
+ */
+var AudioState = {
+  Playing: "playing",
+  Paused: "paused",
+  Stopped: "stopped"
+};
+
+/**
+ * Return an array of elements based on the selector query
+ * @param {string} selector - The selector to find elements
+ * @returns {array} An array of matching elements
+ */
+function $(selector) {
+  return Array.from(document.querySelectorAll(selector));
+}
+
+/**
+ * Build linear gradient CSS
+ * @private
+ * @param {string} startDir - Starting direction
+ * @param {string} endDir - Ending direction
+ * @param {string} startColor - The starting color
+ * @param {string} endColor - The ending color
+ * @returns {string} A string of the gradient CSS
+ */
+function _buildLinearGradient(startDir, endDir, startColor, endColor) {
+  return "-webkit-gradient(linear, " + startDir + ", " + endDir + ", from(" + startColor + "), to(" + endColor + ")) fixed";
+}
+
+/**
+ * Build radial gradient CSS
+ * @private
+ * @param {string} width - Width of the gradient
+ * @param {string} startColor - The starting color
+ * @param {string} endColor - The ending color
+ * @returns {string} A string of the gradient CSS
+ */
+function _buildRadialGradient(width, startColor, endColor) {
+  return "-webkit-gradient(radial, " + width + " 50%, 100, " + width + " 50%, " + width + ", from(" + startColor + "), to(" + endColor + ")) fixed";
+}
+
+/**
+ * Get a style value from an element (computed or manual)
+ * @private
+ * @param {Object} element - The element whose style we want
+ * @param {string} style - The name of the style we want
+ * @returns {(Number|string)} The style value (type depends on the style)
+ */
+function _getStyle(element, style) {
+  return document.defaultView.getComputedStyle(element).getPropertyValue(style);
+}
+
+/**
+ * Convert newlines to <br> tags
+ * @private
+ * @param {string} text - The text to parse
+ * @returns {string} The text now with <br> tags
+ */
+function _nl2br(text) {
+  return text.replace("\r\n", "\n").replace("\n", "<br>");
+}
+
+/**
+ * Prepare text by creating paragraphs and calling _nl2br to convert newlines to <br> tags
+ * @private
+ * @param {string} text - The text to parse
+ * @returns {string} The text now with <p> and <br> tags
+ */
+function _prepareText(text) {
+  return "<p>" + _nl2br(text) + "</p>";
+}
+
+/**
+ * The paths we get are JSON versions of Python Path objects, so let's just fix that.
+ * @private
+ * @param {object} path - The Path object
+ * @returns {string} The actual file path
+ */
+function _pathToString(path) {
+    var filename = path.__Path__.join("/").replace("//", "/");
+    if (!filename.startsWith("/")) {
+        filename = "/" + filename;
+    }
+    return filename;
+}
+
+/**
+ * An audio player with a play list
+ */
+var AudioPlayer = function (audioElement) {
+  this._audioElement = null;
+  this._eventListeners = {};
+  this._playlist = [];
+  this._currentTrack = null;
+  this._canRepeat = false;
+  this._state = AudioState.Stopped;
+  this.createAudioElement();
+};
+
+/**
+ * Call all listeners associated with this event
+ * @private
+ * @param {object} event - The event that was emitted
+ */
+AudioPlayer.prototype._callListener = function (event) {
+  if (this._eventListeners.hasOwnProperty(event.type)) {
+    this._eventListeners[event.type].forEach(function (listener) {
+      listener(event);
+    });
+  }
+  else {
+    console.warn("Received unknown event \"" + event.type + "\", doing nothing.");
+  }
+};
+
+/**
+ * Create the <audio> element that is used to play the audio
+ */
+AudioPlayer.prototype.createAudioElement = function () {
+  this._audioElement = document.createElement("audio");
+  this._audioElement.addEventListener("ended", this.onEnded);
+  this._audioElement.addEventListener("ended", this._callListener);
+  this._audioElement.addEventListener("timeupdate", this._callListener);
+  this._audioElement.addEventListener("volumechange", this._callListener);
+  this._audioElement.addEventListener("durationchange", this._callListener);
+  this._audioElement.addEventListener("loadeddata", this._callListener);
+  document.addEventListener("complete", function(event) {
+    document.body.appendChild(this._audioElement);
+  });
+};
+AudioPlayer.prototype.addEventListener = function (eventType, listener) {
+  this._eventListeners[eventType] = this._eventListeners[eventType] || [];
+  this._eventListeners[eventType].push(listener);
+};
+AudioPlayer.prototype.onEnded = function (event) {
+  this.nextTrack();
+};
+AudioPlayer.prototype.setCanRepeat = function (canRepeat) {
+  this._canRepeat = canRepeat;
+};
+AudioPlayer.prototype.clearTracks = function () {
+  this._playlist = [];
+};
+AudioPlayer.prototype.addTrack = function (track) {
+  this._playlist.push(track);
+};
+AudioPlayer.prototype.nextTrack = function () {
+  if (!!this._currentTrack) {
+    var trackIndex = this._playlist.indexOf(this._currentTrack);
+    if ((trackIndex + 1 >= this._playlist.length) && this._canRepeat) {
+      this.play(this._playlist[0]);
+    }
+    else if (trackIndex + 1 < this._playlist.length) {
+      this.play(this._playlist[trackIndex + 1]);
+    }
+    else {
+      this.stop();
+    }
+  }
+  else if (this._playlist.length > 0) {
+    this.play(this._playlist[0]);
+  }
+  else {
+    console.warn("No tracks in playlist, doing nothing.");
+  }
+};
+AudioPlayer.prototype.play = function () {
+  if (arguments.length > 0) {
+    this._currentTrack = arguments[0];
+    this._audioElement.src = this._currentTrack;
+    this._audioElement.play();
+    this._state = AudioState.Playing;
+  }
+  else if (this._state == AudioState.Paused) {
+    this._audioElement.play();
+    this._state = AudioState.Playing;
+  }
+  else {
+    console.warn("No track currently paused and no track specified, doing nothing.");
+  }
+};
+
+/**
+ * Pause
+ */
+AudioPlayer.prototype.pause = function () {
+  this._audioElement.pause();
+  this._state = AudioState.Paused;
+};
+
+/**
+ * Stop playing
+ */
+AudioPlayer.prototype.stop = function () {
+  this._audioElement.pause();
+  this._audioElement.src = "";
+  this._state = AudioState.Stopped;
+};
+
+/**
+ * The Display object is what we use from OpenLP
+ */
+var Display = {
+  _slides: {},
+  _revealConfig: {
+    margin: 0.0,
+    minScale: 1.0,
+    maxScale: 1.0,
+    controls: false,
+    progress: false,
+    history: false,
+    overview: false,
+    center: false,
+    help: false,
+    transition: "none",
+    backgroundTransition: "none",
+    viewDistance: 9999,
+    width: "100%",
+    height: "100%"
+  },
+  /**
+   * Start up reveal and do any other initialisation
+   */
+  init: function () {
+    Reveal.initialize(this._revealConfig);
+  },
+  /**
+   * Reinitialise Reveal
+   */
+  reinit: function () {
+    Reveal.reinitialize();
+  },
+  /**
+   * Set the transition type
+   * @param {string} transitionType - Can be one of "none", "fade", "slide", "convex", "concave", "zoom"
+   */
+  setTransition: function (transitionType) {
+    Reveal.configure({"transition": transitionType});
+  },
+  /**
+   * Clear the current list of slides
+  */
+  clearSlides: function () {
+    $(".slides")[0].innerHTML = "";
+    this._slides = {};
+  },
+  /**
+   * Checks if the present slide content fits within the slide
+  */
+  doesContentFit: function () {
+    console.debug("scrollHeight: " + $(".slides")[0].scrollHeight + ", clientHeight: " + $(".slides")[0].clientHeight);
+    return $(".slides")[0].clientHeight >= $(".slides")[0].scrollHeight;
+  },
+  /**
+   * Generate the OpenLP startup splashscreen
+   * @param {string} bg_color - The background color
+   * @param {string} image - Path to the splash image
+   */
+  setStartupSplashScreen: function(bg_color, image) {
+    Display.clearSlides();
+    var globalBackground = $("#global-background")[0];
+    globalBackground.style.cssText = "";
+    globalBackground.style.setProperty("background", bg_color);
+    var slidesDiv = $(".slides")[0];
+    var section = document.createElement("section");
+    section.setAttribute("id", 0);
+    section.setAttribute("data-background", bg_color);
+    section.setAttribute("style", "height: 100%; width: 100%; position: relative;");
+    var img = document.createElement('img');
+    img.src = image;
+    img.setAttribute("style", "position: absolute; top: 0; bottom: 0; left: 0; right: 0; margin: auto;");
+    section.appendChild(img);
+    slidesDiv.appendChild(section);
+    Display._slides['0'] = 0;
+    Display.reinit();
+  },
+  /**
+   * Set fullscreen image from path
+   * @param {string} bg_color - The background color
+   * @param {string} image - Path to the image
+   */
+  setFullscreenImage: function(bg_color, image) {
+    Display.clearSlides();
+    var globalBackground = $("#global-background")[0];
+    globalBackground.style.cssText = "";
+    globalBackground.style.setProperty("background", bg_color);
+    var slidesDiv = $(".slides")[0];
+    var section = document.createElement("section");
+    section.setAttribute("id", 0);
+    section.setAttribute("data-background", bg_color);
+    section.setAttribute("style", "height: 100%; width: 100%;");
+    var img = document.createElement('img');
+    img.src = image;
+    img.setAttribute("style", "height: 100%; width: 100%");
+    section.appendChild(img);
+    slidesDiv.appendChild(section);
+    Display._slides['0'] = 0;
+    Display.reinit();
+  },
+  /**
+   * Set fullscreen image from base64 data
+   * @param {string} bg_color - The background color
+   * @param {string} image - Path to the image
+   */
+  setFullscreenImageFromData: function(bg_color, image_data) {
+    Display.clearSlides();
+    var globalBackground = $("#global-background")[0];
+    globalBackground.style.cssText = "";
+    globalBackground.style.setProperty("background", bg_color);
+    var slidesDiv = $(".slides")[0];
+    var section = document.createElement("section");
+    section.setAttribute("id", 0);
+    section.setAttribute("data-background", bg_color);
+    section.setAttribute("style", "height: 100%; width: 100%;");
+    var img = document.createElement('img');
+    img.src = 'data:image/png;base64,' + image_data;
+    img.setAttribute("style", "height: 100%; width: 100%");
+    section.appendChild(img);
+    slidesDiv.appendChild(section);
+    Display._slides['0'] = 0;
+    Display.reinit();
+  },
+  /**
+   * Display an alert
+   * @param {string} text - The alert text
+   * @param {int} location - The location of the text (top, middle or bottom)
+  */
+ alert: function (text, location) {
+  console.debug(" alert text: " + text, ", location: " + location);
+  /*
+   * The implementation should show an alert.
+   * It should be able to handle receiving a new alert before a previous one is "finished", basically queueing it.
+   */
+  return;
+},
+
+  /**
+   * Add a slides. If the slide exists but the HTML is different, update the slide.
+   * @param {string} verse - The verse number, e.g. "v1"
+   * @param {string} text - The HTML for the verse, e.g. "line1<br>line2"
+   * @param {string} footer_text - The HTML for the footer"
+   * @param {bool} [reinit=true] - Re-initialize Reveal. Defaults to true.
+   */
+  addTextSlide: function (verse, text, footer_text) {
+    var html = _prepareText(text);
+    if (this._slides.hasOwnProperty(verse)) {
+      var slide = $("#" + verse)[0];
+      if (slide.innerHTML != html) {
+        slide.innerHTML = html;
+      }
+    }
+    else {
+      var slidesDiv = $(".slides")[0];
+      var slide = document.createElement("section");
+      slide.setAttribute("id", verse);
+      slide.innerHTML = html;
+      slidesDiv.appendChild(slide);
+      var slides = $(".slides > section");
+      this._slides[verse] = slides.length - 1;
+
+      console.debug(" footer_text: " + footer_text);
+
+      var footerDiv = $(".footer")[0];
+      footerDiv.innerHTML = footer_text;
+    }
+    if ((arguments.length > 3) && (arguments[3] === true)) {
+      this.reinit();
+    }
+    else if (arguments.length == 3) {
+      this.reinit();
+    }
+  },
+  /**
+   * Set text slides.
+   * @param {Object[]} slides - A list of slides to add as JS objects: {"verse": "v1", "text": "line 1\nline2"}
+   */
+  setTextSlides: function (slides) {
+    Display.clearSlides();
+    slides.forEach(function (slide) {
+      Display.addTextSlide(slide.verse, slide.text, slide.footer, false);
+    });
+    Display.reinit();
+    Display.goToSlide(0);
+  },
+  /**
+   * Set image slides
+   * @param {Object[]} slides - A list of images to add as JS objects [{"path": "url/to/file"}]
+   */
+  setImageSlides: function (slides) {
+    Display.clearSlides();
+    var slidesDiv = $(".slides")[0];
+    slides.forEach(function (slide, index) {
+      var section = document.createElement("section");
+      section.setAttribute("id", index);
+      section.setAttribute("data-background", "#000");
+      var img = document.createElement('img');
+      img.src = slide["path"];
+      img.setAttribute("style", "height: 100%; width: 100%;");
+      section.appendChild(img);
+      slidesDiv.appendChild(section);
+      Display._slides[index.toString()] = index;
+    });
+    Display.reinit();
+  },
+  /**
+   * Set a video
+   * @param {Object} video - The video to show as a JS object: {"path": "url/to/file"}
+   */
+  setVideo: function (video) {
+    this.clearSlides();
+    var section = document.createElement("section");
+    section.setAttribute("data-background", "#000");
+    var videoElement = document.createElement("video");
+    videoElement.src = video["path"];
+    videoElement.preload = "auto";
+    videoElement.setAttribute("id", "video");
+    videoElement.setAttribute("style", "height: 100%; width: 100%;");
+    videoElement.autoplay = false;
+    // All the update methods below are Python functions, hence not camelCase
+    videoElement.addEventListener("durationchange", function (event) {
+      mediaWatcher.update_duration(event.target.duration);
+    });
+    videoElement.addEventListener("timeupdate", function (event) {
+      mediaWatcher.update_progress(event.target.currentTime);
+    });
+    videoElement.addEventListener("volumeupdate", function (event) {
+      mediaWatcher.update_volume(event.target.volume);
+    });
+    videoElement.addEventListener("ratechange", function (event) {
+      mediaWatcher.update_playback_rate(event.target.playbackRate);
+    });
+    videoElement.addEventListener("ended", function (event) {
+      mediaWatcher.has_ended(event.target.ended);
+    });
+    videoElement.addEventListener("muted", function (event) {
+      mediaWatcher.has_muted(event.target.muted);
+    });
+    section.appendChild(videoElement);
+    $(".slides")[0].appendChild(section);
+    this.reinit();
+  },
+  /**
+   * Play a video
+   */
+  playVideo: function () {
+    if ($("#video").length == 1) {
+      $("#video")[0].play();
+    }
+  },
+  /**
+   * Pause a video
+   */
+  pauseVideo: function () {
+    if ($("#video").length == 1) {
+      $("#video")[0].pause();
+    }
+  },
+  /**
+   * Stop a video
+   */
+  stopVideo: function () {
+    if ($("#video").length == 1) {
+      $("#video")[0].pause();
+      $("#video")[0].currentTime = 0.0;
+    }
+  },
+  /**
+   * Go to a particular time in a video
+   * @param seconds The position in seconds to seek to
+   */
+  seekVideo: function (seconds) {
+    if ($("#video").length == 1) {
+      $("#video")[0].currentTime = seconds;
+    }
+  },
+  /**
+   * Set the playback rate of a video
+   * @param rate A Double of the rate. 1.0 => 100% speed, 0.75 => 75% speed, 1.25 => 125% speed, etc.
+   */
+  setPlaybackRate: function (rate) {
+    if ($("#video").length == 1) {
+      $("#video")[0].playbackRate = rate;
+    }
+  },
+  /**
+   * Set the volume
+   * @param level The volume level from 0 to 100.
+   */
+  setVideoVolume: function (level) {
+    if ($("#video").length == 1) {
+      $("#video")[0].volume = level / 100.0;
+    }
+  },
+  /**
+   * Mute the volume
+   */
+  toggleVideoMute: function () {
+    if ($("#video").length == 1) {
+      $("#video")[0].muted = !$("#video")[0].muted;
+    }
+  },
+  /**
+   * Clear the background audio playlist
+   */
+  clearPlaylist: function () {
+    if ($("#background-audio").length == 1) {
+      var audio = $("#background-audio")[0];
+      /* audio.playList */
+    }
+  },
+  /**
+   * Add background audio
+   * @param files The list of files as objects in an array
+   */
+  addBackgroundAudio: function (files) {
+  },
+  /**
+   * Go to a slide.
+   * @param slide The slide number or name, e.g. "v1", 0
+   */
+  goToSlide: function (slide) {
+    if (this._slides.hasOwnProperty(slide)) {
+      Reveal.slide(this._slides[slide]);
+    }
+    else {
+      Reveal.slide(slide);
+    }
+  },
+  /**
+   * Go to the next slide in the list
+  */
+  next: Reveal.next,
+  /**
+   * Go to the previous slide in the list
+  */
+  prev: Reveal.prev,
+  /**
+   * Blank the screen
+  */
+  blankToBlack: function () {
+    if (!Reveal.isPaused()) {
+      Reveal.togglePause();
+    }
+    // var slidesDiv = $(".slides")[0];
+  },
+  /**
+   * Blank to theme
+  */
+  blankToTheme: function () {
+    var slidesDiv = $(".slides")[0];
+    slidesDiv.style.visibility = "hidden";
+    var footerDiv = $(".footer")[0];
+    footerDiv.style.visibility = "hidden";
+    if (Reveal.isPaused()) {
+      Reveal.togglePause();
+    }
+  },
+  /**
+   * Show the screen
+  */
+  show: function () {
+    var slidesDiv = $(".slides")[0];
+    slidesDiv.style.visibility = "visible";
+    var footerDiv = $(".footer")[0];
+    footerDiv.style.visibility = "visible";
+    if (Reveal.isPaused()) {
+      Reveal.togglePause();
+    }
+  },
+  /**
+   * Figure out how many lines can fit on a slide given the font size
+   * @param fontSize The font size in pts
+   */
+  calculateLineCount: function (fontSize) {
+    var p = $(".slides > section > p");
+    if (p.length == 0) {
+      this.addSlide("v1", "Arky arky");
+      p = $(".slides > section > p");
+    }
+    p = p[0];
+    p.style.fontSize = "" + fontSize + "pt";
+    var d = $(".slides")[0];
+    var lh = parseFloat(_getStyle(p, "line-height"));
+    var dh = parseFloat(_getStyle(d, "height"));
+    return Math.floor(dh / lh);
+  },
+  setTheme: function (theme) {
+    this._theme = theme;
+    var slidesDiv = $(".slides")
+    // Set the background
+    var globalBackground = $("#global-background")[0];
+    var backgroundStyle = {};
+    var backgroundHtml = "";
+    switch (theme.background_type) {
+      case BackgroundType.Transparent:
+        backgroundStyle["background"] = "transparent";
+        break;
+      case BackgroundType.Solid:
+        backgroundStyle["background"] = theme.background_color;
+        break;
+      case BackgroundType.Gradient:
+        switch (theme.background_direction) {
+          case GradientType.Horizontal:
+            backgroundStyle["background"] = _buildLinearGradient("left top", "left bottom",
+                                                                 theme.background_start_color,
+                                                                 theme.background_end_color);
+            break;
+          case GradientType.Vertical:
+            backgroundStyle["background"] = _buildLinearGradient("left top", "right top",
+                                                                 theme.background_start_color,
+                                                                 theme.background_end_color);
+            break;
+          case GradientType.LeftTop:
+            backgroundStyle["background"] = _buildLinearGradient("left top", "right bottom",
+                                                                 theme.background_start_color,
+                                                                 theme.background_end_color);
+            break;
+          case GradientType.LeftBottom:
+            backgroundStyle["background"] = _buildLinearGradient("left bottom", "right top",
+                                                                 theme.background_start_color,
+                                                                 theme.background_end_color);
+            break;
+          case GradientType.Circular:
+            backgroundStyle["background"] = _buildRadialGradient(window.innerWidth / 2, theme.background_start_color,
+                                                                 theme.background_end_color);
+            break;
+          default:
+            backgroundStyle["background"] = "#000";
+        }
+        break;
+      case BackgroundType.Image:
+        background_filename = _pathToString(theme.background_filename);
+        backgroundStyle["background-image"] = "url('file://" + background_filename + "')";
+        break;
+      case BackgroundType.Video:
+        background_filename = _pathToString(theme.background_filename);
+        backgroundStyle["background-color"] = theme.background_border_color;
+        backgroundHtml = "<video loop autoplay muted><source src='file://" + background_filename + "'></video>";
+        break;
+      default:
+        backgroundStyle["background"] = "#000";
+    }
+    globalBackground.style.cssText = "";
+    for (var key in backgroundStyle) {
+      if (backgroundStyle.hasOwnProperty(key)) {
+        globalBackground.style.setProperty(key, backgroundStyle[key]);
+      }
+    }
+    if (!!backgroundHtml) {
+      globalBackground.innerHTML = backgroundHtml;
+    }
+    // set up the main area
+    mainStyle = {
+      "word-wrap": "break-word",
+      /*"margin": "0",
+      "padding": "0"*/
+    };
+    if (!!theme.font_main_outline) {
+      mainStyle["-webkit-text-stroke"] = "" + theme.font_main_outline_size + "pt " +
+                                         theme.font_main_outline_color;
+      mainStyle["-webkit-text-fill-color"] = theme.font_main_color;
+    }
+    mainStyle["font-family"] = theme.font_main_name;
+    mainStyle["font-size"] = "" + theme.font_main_size + "pt";
+    mainStyle["font-style"] = !!theme.font_main_italics ? "italic" : "";
+    mainStyle["font-weight"] = !!theme.font_main_bold ? "bold" : "";
+    mainStyle["color"] = theme.font_main_color;
+    mainStyle["line-height"] = "" + (100 + theme.font_main_line_adjustment) + "%";
+    mainStyle["text-align"] = theme.display_horizontal_align;
+    if (theme.display_horizontal_align != HorizontalAlign.Justify) {
+      mainStyle["white-space"] = "pre-wrap";
+    }
+    mainStyle["vertical-align"] = theme.display_vertical_align;
+    if (theme.hasOwnProperty('font_main_shadow_size')) {
+      mainStyle["text-shadow"] = theme.font_main_shadow_color + " " + theme.font_main_shadow_size + "px " +
+                                 theme.font_main_shadow_size + "px";
+    }
+    mainStyle["padding-bottom"] = theme.display_vertical_align == VerticalAlign.Bottom ? "0.5em" : "0";
+    mainStyle["padding-left"] = !!theme.font_main_outline ? "" + (theme.font_main_outline_size * 2) + "pt" : "0";
+    // These need to be fixed, in the Python they use a width passed in as a parameter
+    mainStyle["position"] = "absolute";
+    mainStyle["width"] = "" + (window.innerWidth - (theme.font_main_outline_size * 4)) + "px";
+    mainStyle["height"] = "" + (window.innerHeight - (theme.font_main_outline_size * 4)) + "px";
+    mainStyle["left"] = "" + theme.font_main_x + "px";
+    mainStyle["top"] = "" + theme.font_main_y + "px";
+    var slidesDiv = $(".slides")[0];
+    slidesDiv.style.cssText = "";
+    for (var key in mainStyle) {
+      if (mainStyle.hasOwnProperty(key)) {
+        slidesDiv.style.setProperty(key, mainStyle[key]);
+      }
+    }
+    // Set up the footer
+    footerStyle = {
+      "text-align": "left"
+    };
+    footerStyle["position"] = "absolute";
+    footerStyle["left"] = "" + theme.font_footer_x + "px";
+    footerStyle["top"] = "" + theme.font_footer_y + "px";
+    footerStyle["bottom"] = "" + (window.innerHeight - theme.font_footer_y - theme.font_footer_height) + "px";
+    footerStyle["width"] = "" + theme.font_footer_width + "px";
+    footerStyle["font-family"] = theme.font_footer_name;
+    footerStyle["font-size"] = "" + theme.font_footer_size + "pt";
+    footerStyle["color"] = theme.font_footer_color;
+    footerStyle["white-space"] = theme.font_footer_wrap ? "normal" : "nowrap";
+    var footer = $(".footer")[0];
+    footer.style.cssText = "";
+    for (var key in footerStyle) {
+      if (footerStyle.hasOwnProperty(key)) {
+        footer.style.setProperty(key, footerStyle[key]);
+      }
+    }
+  },
+  /**
+   * Return the video types supported by the video tag
+   */
+  getVideoTypes: function () {
+    var videoElement = document.createElement('video');
+    var videoTypes = [];
+    if (videoElement.canPlayType('video/mp4; codecs="mp4v.20.8"') == "probably" ||
+        videoElement.canPlayType('video/mp4; codecs="avc1.42E01E"') == "pobably" ||
+        videoElement.canPlayType('video/mp4; codecs="avc1.42E01E, mp4a.40.2"') == "probably") {
+      videoTypes.push(['video/mp4', '*.mp4']);
+    }
+    if (videoElement.canPlayType('video/ogg; codecs="theora"') == "probably") {
+      videoTypes.push(['video/ogg', '*.ogv']);
+    }
+    if (videoElement.canPlayType('video/webm; codecs="vp8, vorbis"') == "probably") {
+      videoTypes.push(['video/webm', '*.webm']);
+    }
+    return videoTypes;
+  },
+  /**
+   * Sets the scale of the page - used to make preview widgets scale 
+   */
+  setScale: function(scale) {
+    document.body.style.zoom = scale+"%";
+  }
+};
+new QWebChannel(qt.webChannelTransport, function (channel) {
+  window.mediaWatcher = channel.objects.mediaWatcher;
+});

=== added file 'openlp/core/display/html/openlp-splash-screen.png'
Binary files openlp/core/display/html/openlp-splash-screen.png	1970-01-01 00:00:00 +0000 and openlp/core/display/html/openlp-splash-screen.png	2019-02-13 21:39:24 +0000 differ
=== added file 'openlp/core/display/html/reveal.css'
--- openlp/core/display/html/reveal.css	1970-01-01 00:00:00 +0000
+++ openlp/core/display/html/reveal.css	2019-02-13 21:39:24 +0000
@@ -0,0 +1,1591 @@
+/*!
+ * reveal.js
+ * http://revealjs.com
+ * MIT licensed
+ *
+ * Copyright (C) 2018 Hakim El Hattab, http://hakim.se
+ */
+/*********************************************
+ * RESET STYLES
+ *********************************************/
+html, body, .reveal div, .reveal span, .reveal applet, .reveal object, .reveal iframe,
+.reveal h1, .reveal h2, .reveal h3, .reveal h4, .reveal h5, .reveal h6, .reveal p, .reveal blockquote, .reveal pre,
+.reveal a, .reveal abbr, .reveal acronym, .reveal address, .reveal big, .reveal cite, .reveal code,
+.reveal del, .reveal dfn, .reveal em, .reveal img, .reveal ins, .reveal kbd, .reveal q, .reveal s, .reveal samp,
+.reveal small, .reveal strike, .reveal strong, .reveal sub, .reveal sup, .reveal tt, .reveal var,
+.reveal b, .reveal u, .reveal center,
+.reveal dl, .reveal dt, .reveal dd, .reveal ol, .reveal ul, .reveal li,
+.reveal fieldset, .reveal form, .reveal label, .reveal legend,
+.reveal table, .reveal caption, .reveal tbody, .reveal tfoot, .reveal thead, .reveal tr, .reveal th, .reveal td,
+.reveal article, .reveal aside, .reveal canvas, .reveal details, .reveal embed,
+.reveal figure, .reveal figcaption, .reveal footer, .reveal header, .reveal hgroup,
+.reveal menu, .reveal nav, .reveal output, .reveal ruby, .reveal section, .reveal summary,
+.reveal time, .reveal mark, .reveal audio, .reveal video {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-size: 100%;
+  font: inherit;
+  vertical-align: baseline; }
+
+.reveal article, .reveal aside, .reveal details, .reveal figcaption, .reveal figure,
+.reveal footer, .reveal header, .reveal hgroup, .reveal menu, .reveal nav, .reveal section {
+  display: block; }
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+html,
+body {
+  width: 100%;
+  height: 100%;
+  overflow: hidden; }
+
+body {
+  position: relative;
+  line-height: 1;
+  background-color: #fff;
+  color: #000; }
+
+/*********************************************
+ * VIEW FRAGMENTS
+ *********************************************/
+.reveal .slides section .fragment {
+  opacity: 0;
+  visibility: hidden;
+  transition: all .2s ease; }
+  .reveal .slides section .fragment.visible {
+    opacity: 1;
+    visibility: inherit; }
+
+.reveal .slides section .fragment.grow {
+  opacity: 1;
+  visibility: inherit; }
+  .reveal .slides section .fragment.grow.visible {
+    -webkit-transform: scale(1.3);
+            transform: scale(1.3); }
+
+.reveal .slides section .fragment.shrink {
+  opacity: 1;
+  visibility: inherit; }
+  .reveal .slides section .fragment.shrink.visible {
+    -webkit-transform: scale(0.7);
+            transform: scale(0.7); }
+
+.reveal .slides section .fragment.zoom-in {
+  -webkit-transform: scale(0.1);
+          transform: scale(0.1); }
+  .reveal .slides section .fragment.zoom-in.visible {
+    -webkit-transform: none;
+            transform: none; }
+
+.reveal .slides section .fragment.fade-out {
+  opacity: 1;
+  visibility: inherit; }
+  .reveal .slides section .fragment.fade-out.visible {
+    opacity: 0;
+    visibility: hidden; }
+
+.reveal .slides section .fragment.semi-fade-out {
+  opacity: 1;
+  visibility: inherit; }
+  .reveal .slides section .fragment.semi-fade-out.visible {
+    opacity: 0.5;
+    visibility: inherit; }
+
+.reveal .slides section .fragment.strike {
+  opacity: 1;
+  visibility: inherit; }
+  .reveal .slides section .fragment.strike.visible {
+    text-decoration: line-through; }
+
+.reveal .slides section .fragment.fade-up {
+  -webkit-transform: translate(0, 20%);
+          transform: translate(0, 20%); }
+  .reveal .slides section .fragment.fade-up.visible {
+    -webkit-transform: translate(0, 0);
+            transform: translate(0, 0); }
+
+.reveal .slides section .fragment.fade-down {
+  -webkit-transform: translate(0, -20%);
+          transform: translate(0, -20%); }
+  .reveal .slides section .fragment.fade-down.visible {
+    -webkit-transform: translate(0, 0);
+            transform: translate(0, 0); }
+
+.reveal .slides section .fragment.fade-right {
+  -webkit-transform: translate(-20%, 0);
+          transform: translate(-20%, 0); }
+  .reveal .slides section .fragment.fade-right.visible {
+    -webkit-transform: translate(0, 0);
+            transform: translate(0, 0); }
+
+.reveal .slides section .fragment.fade-left {
+  -webkit-transform: translate(20%, 0);
+          transform: translate(20%, 0); }
+  .reveal .slides section .fragment.fade-left.visible {
+    -webkit-transform: translate(0, 0);
+            transform: translate(0, 0); }
+
+.reveal .slides section .fragment.fade-in-then-out,
+.reveal .slides section .fragment.current-visible {
+  opacity: 0;
+  visibility: hidden; }
+  .reveal .slides section .fragment.fade-in-then-out.current-fragment,
+  .reveal .slides section .fragment.current-visible.current-fragment {
+    opacity: 1;
+    visibility: inherit; }
+
+.reveal .slides section .fragment.fade-in-then-semi-out {
+  opacity: 0;
+  visibility: hidden; }
+  .reveal .slides section .fragment.fade-in-then-semi-out.visible {
+    opacity: 0.5;
+    visibility: inherit; }
+  .reveal .slides section .fragment.fade-in-then-semi-out.current-fragment {
+    opacity: 1;
+    visibility: inherit; }
+
+.reveal .slides section .fragment.highlight-red,
+.reveal .slides section .fragment.highlight-current-red,
+.reveal .slides section .fragment.highlight-green,
+.reveal .slides section .fragment.highlight-current-green,
+.reveal .slides section .fragment.highlight-blue,
+.reveal .slides section .fragment.highlight-current-blue {
+  opacity: 1;
+  visibility: inherit; }
+
+.reveal .slides section .fragment.highlight-red.visible {
+  color: #ff2c2d; }
+
+.reveal .slides section .fragment.highlight-green.visible {
+  color: #17ff2e; }
+
+.reveal .slides section .fragment.highlight-blue.visible {
+  color: #1b91ff; }
+
+.reveal .slides section .fragment.highlight-current-red.current-fragment {
+  color: #ff2c2d; }
+
+.reveal .slides section .fragment.highlight-current-green.current-fragment {
+  color: #17ff2e; }
+
+.reveal .slides section .fragment.highlight-current-blue.current-fragment {
+  color: #1b91ff; }
+
+/*********************************************
+ * DEFAULT ELEMENT STYLES
+ *********************************************/
+/* Fixes issue in Chrome where italic fonts did not appear when printing to PDF */
+.reveal:after {
+  content: '';
+  font-style: italic; }
+
+.reveal iframe {
+  z-index: 1; }
+
+/** Prevents layering issues in certain browser/transition combinations */
+.reveal a {
+  position: relative; }
+
+.reveal .stretch {
+  max-width: none;
+  max-height: none; }
+
+.reveal pre.stretch code {
+  height: 100%;
+  max-height: 100%;
+  box-sizing: border-box; }
+
+/*********************************************
+ * CONTROLS
+ *********************************************/
+@-webkit-keyframes bounce-right {
+  0%, 10%, 25%, 40%, 50% {
+    -webkit-transform: translateX(0);
+            transform: translateX(0); }
+  20% {
+    -webkit-transform: translateX(10px);
+            transform: translateX(10px); }
+  30% {
+    -webkit-transform: translateX(-5px);
+            transform: translateX(-5px); } }
+@keyframes bounce-right {
+  0%, 10%, 25%, 40%, 50% {
+    -webkit-transform: translateX(0);
+            transform: translateX(0); }
+  20% {
+    -webkit-transform: translateX(10px);
+            transform: translateX(10px); }
+  30% {
+    -webkit-transform: translateX(-5px);
+            transform: translateX(-5px); } }
+
+@-webkit-keyframes bounce-down {
+  0%, 10%, 25%, 40%, 50% {
+    -webkit-transform: translateY(0);
+            transform: translateY(0); }
+  20% {
+    -webkit-transform: translateY(10px);
+            transform: translateY(10px); }
+  30% {
+    -webkit-transform: translateY(-5px);
+            transform: translateY(-5px); } }
+
+@keyframes bounce-down {
+  0%, 10%, 25%, 40%, 50% {
+    -webkit-transform: translateY(0);
+            transform: translateY(0); }
+  20% {
+    -webkit-transform: translateY(10px);
+            transform: translateY(10px); }
+  30% {
+    -webkit-transform: translateY(-5px);
+            transform: translateY(-5px); } }
+
+.reveal .controls {
+  display: none;
+  position: absolute;
+  top: auto;
+  bottom: 12px;
+  right: 12px;
+  left: auto;
+  z-index: 1;
+  color: #000;
+  pointer-events: none;
+  font-size: 10px; }
+  .reveal .controls button {
+    position: absolute;
+    padding: 0;
+    background-color: transparent;
+    border: 0;
+    outline: 0;
+    cursor: pointer;
+    color: currentColor;
+    -webkit-transform: scale(0.9999);
+            transform: scale(0.9999);
+    transition: color 0.2s ease, opacity 0.2s ease, -webkit-transform 0.2s ease;
+    transition: color 0.2s ease, opacity 0.2s ease, transform 0.2s ease;
+    z-index: 2;
+    pointer-events: auto;
+    font-size: inherit;
+    visibility: hidden;
+    opacity: 0;
+    -webkit-appearance: none;
+    -webkit-tap-highlight-color: transparent; }
+  .reveal .controls .controls-arrow:before,
+  .reveal .controls .controls-arrow:after {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 2.6em;
+    height: 0.5em;
+    border-radius: 0.25em;
+    background-color: currentColor;
+    transition: all 0.15s ease, background-color 0.8s ease;
+    -webkit-transform-origin: 0.2em 50%;
+            transform-origin: 0.2em 50%;
+    will-change: transform; }
+  .reveal .controls .controls-arrow {
+    position: relative;
+    width: 3.6em;
+    height: 3.6em; }
+    .reveal .controls .controls-arrow:before {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(45deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(45deg); }
+    .reveal .controls .controls-arrow:after {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(-45deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(-45deg); }
+    .reveal .controls .controls-arrow:hover:before {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(40deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(40deg); }
+    .reveal .controls .controls-arrow:hover:after {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(-40deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(-40deg); }
+    .reveal .controls .controls-arrow:active:before {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(36deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(36deg); }
+    .reveal .controls .controls-arrow:active:after {
+      -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(-36deg);
+              transform: translateX(0.5em) translateY(1.55em) rotate(-36deg); }
+  .reveal .controls .navigate-left {
+    right: 6.4em;
+    bottom: 3.2em;
+    -webkit-transform: translateX(-10px);
+            transform: translateX(-10px); }
+  .reveal .controls .navigate-right {
+    right: 0;
+    bottom: 3.2em;
+    -webkit-transform: translateX(10px);
+            transform: translateX(10px); }
+    .reveal .controls .navigate-right .controls-arrow {
+      -webkit-transform: rotate(180deg);
+              transform: rotate(180deg); }
+    .reveal .controls .navigate-right.highlight {
+      -webkit-animation: bounce-right 2s 50 both ease-out;
+              animation: bounce-right 2s 50 both ease-out; }
+  .reveal .controls .navigate-up {
+    right: 3.2em;
+    bottom: 6.4em;
+    -webkit-transform: translateY(-10px);
+            transform: translateY(-10px); }
+    .reveal .controls .navigate-up .controls-arrow {
+      -webkit-transform: rotate(90deg);
+              transform: rotate(90deg); }
+  .reveal .controls .navigate-down {
+    right: 3.2em;
+    bottom: 0;
+    -webkit-transform: translateY(10px);
+            transform: translateY(10px); }
+    .reveal .controls .navigate-down .controls-arrow {
+      -webkit-transform: rotate(-90deg);
+              transform: rotate(-90deg); }
+    .reveal .controls .navigate-down.highlight {
+      -webkit-animation: bounce-down 2s 50 both ease-out;
+              animation: bounce-down 2s 50 both ease-out; }
+  .reveal .controls[data-controls-back-arrows="faded"] .navigate-left.enabled,
+  .reveal .controls[data-controls-back-arrows="faded"] .navigate-up.enabled {
+    opacity: 0.3; }
+    .reveal .controls[data-controls-back-arrows="faded"] .navigate-left.enabled:hover,
+    .reveal .controls[data-controls-back-arrows="faded"] .navigate-up.enabled:hover {
+      opacity: 1; }
+  .reveal .controls[data-controls-back-arrows="hidden"] .navigate-left.enabled,
+  .reveal .controls[data-controls-back-arrows="hidden"] .navigate-up.enabled {
+    opacity: 0;
+    visibility: hidden; }
+  .reveal .controls .enabled {
+    visibility: visible;
+    opacity: 0.9;
+    cursor: pointer;
+    -webkit-transform: none;
+            transform: none; }
+  .reveal .controls .enabled.fragmented {
+    opacity: 0.5; }
+  .reveal .controls .enabled:hover,
+  .reveal .controls .enabled.fragmented:hover {
+    opacity: 1; }
+
+.reveal:not(.has-vertical-slides) .controls .navigate-left {
+  bottom: 1.4em;
+  right: 5.5em; }
+
+.reveal:not(.has-vertical-slides) .controls .navigate-right {
+  bottom: 1.4em;
+  right: 0.5em; }
+
+.reveal:not(.has-horizontal-slides) .controls .navigate-up {
+  right: 1.4em;
+  bottom: 5em; }
+
+.reveal:not(.has-horizontal-slides) .controls .navigate-down {
+  right: 1.4em;
+  bottom: 0.5em; }
+
+.reveal.has-dark-background .controls {
+  color: #fff; }
+
+.reveal.has-light-background .controls {
+  color: #000; }
+
+.reveal.no-hover .controls .controls-arrow:hover:before,
+.reveal.no-hover .controls .controls-arrow:active:before {
+  -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(45deg);
+          transform: translateX(0.5em) translateY(1.55em) rotate(45deg); }
+
+.reveal.no-hover .controls .controls-arrow:hover:after,
+.reveal.no-hover .controls .controls-arrow:active:after {
+  -webkit-transform: translateX(0.5em) translateY(1.55em) rotate(-45deg);
+          transform: translateX(0.5em) translateY(1.55em) rotate(-45deg); }
+
+@media screen and (min-width: 500px) {
+  .reveal .controls[data-controls-layout="edges"] {
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0; }
+  .reveal .controls[data-controls-layout="edges"] .navigate-left,
+  .reveal .controls[data-controls-layout="edges"] .navigate-right,
+  .reveal .controls[data-controls-layout="edges"] .navigate-up,
+  .reveal .controls[data-controls-layout="edges"] .navigate-down {
+    bottom: auto;
+    right: auto; }
+  .reveal .controls[data-controls-layout="edges"] .navigate-left {
+    top: 50%;
+    left: 8px;
+    margin-top: -1.8em; }
+  .reveal .controls[data-controls-layout="edges"] .navigate-right {
+    top: 50%;
+    right: 8px;
+    margin-top: -1.8em; }
+  .reveal .controls[data-controls-layout="edges"] .navigate-up {
+    top: 8px;
+    left: 50%;
+    margin-left: -1.8em; }
+  .reveal .controls[data-controls-layout="edges"] .navigate-down {
+    bottom: 8px;
+    left: 50%;
+    margin-left: -1.8em; } }
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  position: absolute;
+  display: none;
+  height: 3px;
+  width: 100%;
+  bottom: 0;
+  left: 0;
+  z-index: 10;
+  background-color: rgba(0, 0, 0, 0.2);
+  color: #fff; }
+
+.reveal .progress:after {
+  content: '';
+  display: block;
+  position: absolute;
+  height: 10px;
+  width: 100%;
+  top: -10px; }
+
+.reveal .progress span {
+  display: block;
+  height: 100%;
+  width: 0px;
+  background-color: currentColor;
+  transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+
+/*********************************************
+ * SLIDE NUMBER
+ *********************************************/
+.reveal .slide-number {
+  position: absolute;
+  display: block;
+  right: 8px;
+  bottom: 8px;
+  z-index: 31;
+  font-family: Helvetica, sans-serif;
+  font-size: 12px;
+  line-height: 1;
+  color: #fff;
+  background-color: rgba(0, 0, 0, 0.4);
+  padding: 5px; }
+
+.reveal .slide-number a {
+  color: currentColor; }
+
+.reveal .slide-number-delimiter {
+  margin: 0 3px; }
+
+/*********************************************
+ * SLIDES
+ *********************************************/
+.reveal {
+  position: relative;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+  -ms-touch-action: none;
+      touch-action: none; }
+
+@media only screen and (orientation: landscape) {
+  .reveal.ua-iphone {
+    position: fixed; } }
+
+.reveal .slides {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  margin: auto;
+  pointer-events: none;
+  overflow: visible;
+  z-index: 1;
+  text-align: center;
+  -webkit-perspective: 600px;
+          perspective: 600px;
+  -webkit-perspective-origin: 50% 40%;
+          perspective-origin: 50% 40%; }
+
+.reveal .slides > section {
+  -ms-perspective: 600px; }
+
+.reveal .slides > section,
+.reveal .slides > section > section {
+  display: none;
+  position: absolute;
+  width: 100%;
+  padding: 20px 0px;
+  pointer-events: auto;
+  z-index: 10;
+  -webkit-transform-style: flat;
+          transform-style: flat;
+  transition: -webkit-transform-origin 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), -webkit-transform 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), visibility 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), opacity 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+  transition: transform-origin 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), transform 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), visibility 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985), opacity 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+
+/* Global transition speed settings */
+.reveal[data-transition-speed="fast"] .slides section {
+  transition-duration: 400ms; }
+
+.reveal[data-transition-speed="slow"] .slides section {
+  transition-duration: 1200ms; }
+
+/* Slide-specific transition speed overrides */
+.reveal .slides section[data-transition-speed="fast"] {
+  transition-duration: 400ms; }
+
+.reveal .slides section[data-transition-speed="slow"] {
+  transition-duration: 1200ms; }
+
+.reveal .slides > section.stack {
+  padding-top: 0;
+  padding-bottom: 0;
+  pointer-events: none; }
+
+.reveal .slides > section.present,
+.reveal .slides > section > section.present {
+  display: block;
+  z-index: 11;
+  opacity: 1; }
+
+.reveal .slides > section:empty,
+.reveal .slides > section > section:empty,
+.reveal .slides > section[data-background-interactive],
+.reveal .slides > section > section[data-background-interactive] {
+  pointer-events: none; }
+
+.reveal.center,
+.reveal.center .slides,
+.reveal.center .slides section {
+  min-height: 0 !important; }
+
+/* Don't allow interaction with invisible slides */
+.reveal .slides > section.future,
+.reveal .slides > section > section.future,
+.reveal .slides > section.past,
+.reveal .slides > section > section.past {
+  pointer-events: none; }
+
+.reveal.overview .slides > section,
+.reveal.overview .slides > section > section {
+  pointer-events: auto; }
+
+.reveal .slides > section.past,
+.reveal .slides > section.future,
+.reveal .slides > section > section.past,
+.reveal .slides > section > section.future {
+  opacity: 0; }
+
+/*********************************************
+ * Mixins for readability of transitions
+ *********************************************/
+/*********************************************
+ * SLIDE TRANSITION
+ * Aliased 'linear' for backwards compatibility
+ *********************************************/
+.reveal.slide section {
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden; }
+
+.reveal .slides > section[data-transition=slide].past,
+.reveal .slides > section[data-transition~=slide-out].past,
+.reveal.slide .slides > section:not([data-transition]).past {
+  -webkit-transform: translate(-150%, 0);
+          transform: translate(-150%, 0); }
+
+.reveal .slides > section[data-transition=slide].future,
+.reveal .slides > section[data-transition~=slide-in].future,
+.reveal.slide .slides > section:not([data-transition]).future {
+  -webkit-transform: translate(150%, 0);
+          transform: translate(150%, 0); }
+
+.reveal .slides > section > section[data-transition=slide].past,
+.reveal .slides > section > section[data-transition~=slide-out].past,
+.reveal.slide .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate(0, -150%);
+          transform: translate(0, -150%); }
+
+.reveal .slides > section > section[data-transition=slide].future,
+.reveal .slides > section > section[data-transition~=slide-in].future,
+.reveal.slide .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate(0, 150%);
+          transform: translate(0, 150%); }
+
+.reveal.linear section {
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden; }
+
+.reveal .slides > section[data-transition=linear].past,
+.reveal .slides > section[data-transition~=linear-out].past,
+.reveal.linear .slides > section:not([data-transition]).past {
+  -webkit-transform: translate(-150%, 0);
+          transform: translate(-150%, 0); }
+
+.reveal .slides > section[data-transition=linear].future,
+.reveal .slides > section[data-transition~=linear-in].future,
+.reveal.linear .slides > section:not([data-transition]).future {
+  -webkit-transform: translate(150%, 0);
+          transform: translate(150%, 0); }
+
+.reveal .slides > section > section[data-transition=linear].past,
+.reveal .slides > section > section[data-transition~=linear-out].past,
+.reveal.linear .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate(0, -150%);
+          transform: translate(0, -150%); }
+
+.reveal .slides > section > section[data-transition=linear].future,
+.reveal .slides > section > section[data-transition~=linear-in].future,
+.reveal.linear .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate(0, 150%);
+          transform: translate(0, 150%); }
+
+/*********************************************
+ * CONVEX TRANSITION
+ * Aliased 'default' for backwards compatibility
+ *********************************************/
+.reveal .slides section[data-transition=default].stack,
+.reveal.default .slides section.stack {
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d; }
+
+.reveal .slides > section[data-transition=default].past,
+.reveal .slides > section[data-transition~=default-out].past,
+.reveal.default .slides > section:not([data-transition]).past {
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
+          transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
+
+.reveal .slides > section[data-transition=default].future,
+.reveal .slides > section[data-transition~=default-in].future,
+.reveal.default .slides > section:not([data-transition]).future {
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
+          transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
+
+.reveal .slides > section > section[data-transition=default].past,
+.reveal .slides > section > section[data-transition~=default-out].past,
+.reveal.default .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0);
+          transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0); }
+
+.reveal .slides > section > section[data-transition=default].future,
+.reveal .slides > section > section[data-transition~=default-in].future,
+.reveal.default .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0);
+          transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0); }
+
+.reveal .slides section[data-transition=convex].stack,
+.reveal.convex .slides section.stack {
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d; }
+
+.reveal .slides > section[data-transition=convex].past,
+.reveal .slides > section[data-transition~=convex-out].past,
+.reveal.convex .slides > section:not([data-transition]).past {
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
+          transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
+
+.reveal .slides > section[data-transition=convex].future,
+.reveal .slides > section[data-transition~=convex-in].future,
+.reveal.convex .slides > section:not([data-transition]).future {
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
+          transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
+
+.reveal .slides > section > section[data-transition=convex].past,
+.reveal .slides > section > section[data-transition~=convex-out].past,
+.reveal.convex .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0);
+          transform: translate3d(0, -300px, 0) rotateX(70deg) translate3d(0, -300px, 0); }
+
+.reveal .slides > section > section[data-transition=convex].future,
+.reveal .slides > section > section[data-transition~=convex-in].future,
+.reveal.convex .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0);
+          transform: translate3d(0, 300px, 0) rotateX(-70deg) translate3d(0, 300px, 0); }
+
+/*********************************************
+ * CONCAVE TRANSITION
+ *********************************************/
+.reveal .slides section[data-transition=concave].stack,
+.reveal.concave .slides section.stack {
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d; }
+
+.reveal .slides > section[data-transition=concave].past,
+.reveal .slides > section[data-transition~=concave-out].past,
+.reveal.concave .slides > section:not([data-transition]).past {
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
+          transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0); }
+
+.reveal .slides > section[data-transition=concave].future,
+.reveal .slides > section[data-transition~=concave-in].future,
+.reveal.concave .slides > section:not([data-transition]).future {
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
+          transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0); }
+
+.reveal .slides > section > section[data-transition=concave].past,
+.reveal .slides > section > section[data-transition~=concave-out].past,
+.reveal.concave .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate3d(0, -80%, 0) rotateX(-70deg) translate3d(0, -80%, 0);
+          transform: translate3d(0, -80%, 0) rotateX(-70deg) translate3d(0, -80%, 0); }
+
+.reveal .slides > section > section[data-transition=concave].future,
+.reveal .slides > section > section[data-transition~=concave-in].future,
+.reveal.concave .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate3d(0, 80%, 0) rotateX(70deg) translate3d(0, 80%, 0);
+          transform: translate3d(0, 80%, 0) rotateX(70deg) translate3d(0, 80%, 0); }
+
+/*********************************************
+ * ZOOM TRANSITION
+ *********************************************/
+.reveal .slides section[data-transition=zoom],
+.reveal.zoom .slides section:not([data-transition]) {
+  transition-timing-function: ease; }
+
+.reveal .slides > section[data-transition=zoom].past,
+.reveal .slides > section[data-transition~=zoom-out].past,
+.reveal.zoom .slides > section:not([data-transition]).past {
+  visibility: hidden;
+  -webkit-transform: scale(16);
+          transform: scale(16); }
+
+.reveal .slides > section[data-transition=zoom].future,
+.reveal .slides > section[data-transition~=zoom-in].future,
+.reveal.zoom .slides > section:not([data-transition]).future {
+  visibility: hidden;
+  -webkit-transform: scale(0.2);
+          transform: scale(0.2); }
+
+.reveal .slides > section > section[data-transition=zoom].past,
+.reveal .slides > section > section[data-transition~=zoom-out].past,
+.reveal.zoom .slides > section > section:not([data-transition]).past {
+  -webkit-transform: translate(0, -150%);
+          transform: translate(0, -150%); }
+
+.reveal .slides > section > section[data-transition=zoom].future,
+.reveal .slides > section > section[data-transition~=zoom-in].future,
+.reveal.zoom .slides > section > section:not([data-transition]).future {
+  -webkit-transform: translate(0, 150%);
+          transform: translate(0, 150%); }
+
+/*********************************************
+ * CUBE TRANSITION
+ *
+ * WARNING:
+ * this is deprecated and will be removed in a
+ * future version.
+ *********************************************/
+.reveal.cube .slides {
+  -webkit-perspective: 1300px;
+          perspective: 1300px; }
+
+.reveal.cube .slides section {
+  padding: 30px;
+  min-height: 700px;
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden;
+  box-sizing: border-box;
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d; }
+
+.reveal.center.cube .slides section {
+  min-height: 0; }
+
+.reveal.cube .slides section:not(.stack):before {
+  content: '';
+  position: absolute;
+  display: block;
+  width: 100%;
+  height: 100%;
+  left: 0;
+  top: 0;
+  background: rgba(0, 0, 0, 0.1);
+  border-radius: 4px;
+  -webkit-transform: translateZ(-20px);
+          transform: translateZ(-20px); }
+
+.reveal.cube .slides section:not(.stack):after {
+  content: '';
+  position: absolute;
+  display: block;
+  width: 90%;
+  height: 30px;
+  left: 5%;
+  bottom: 0;
+  background: none;
+  z-index: 1;
+  border-radius: 4px;
+  box-shadow: 0px 95px 25px rgba(0, 0, 0, 0.2);
+  -webkit-transform: translateZ(-90px) rotateX(65deg);
+          transform: translateZ(-90px) rotateX(65deg); }
+
+.reveal.cube .slides > section.stack {
+  padding: 0;
+  background: none; }
+
+.reveal.cube .slides > section.past {
+  -webkit-transform-origin: 100% 0%;
+          transform-origin: 100% 0%;
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg);
+          transform: translate3d(-100%, 0, 0) rotateY(-90deg); }
+
+.reveal.cube .slides > section.future {
+  -webkit-transform-origin: 0% 0%;
+          transform-origin: 0% 0%;
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(90deg);
+          transform: translate3d(100%, 0, 0) rotateY(90deg); }
+
+.reveal.cube .slides > section > section.past {
+  -webkit-transform-origin: 0% 100%;
+          transform-origin: 0% 100%;
+  -webkit-transform: translate3d(0, -100%, 0) rotateX(90deg);
+          transform: translate3d(0, -100%, 0) rotateX(90deg); }
+
+.reveal.cube .slides > section > section.future {
+  -webkit-transform-origin: 0% 0%;
+          transform-origin: 0% 0%;
+  -webkit-transform: translate3d(0, 100%, 0) rotateX(-90deg);
+          transform: translate3d(0, 100%, 0) rotateX(-90deg); }
+
+/*********************************************
+ * PAGE TRANSITION
+ *
+ * WARNING:
+ * this is deprecated and will be removed in a
+ * future version.
+ *********************************************/
+.reveal.page .slides {
+  -webkit-perspective-origin: 0% 50%;
+          perspective-origin: 0% 50%;
+  -webkit-perspective: 3000px;
+          perspective: 3000px; }
+
+.reveal.page .slides section {
+  padding: 30px;
+  min-height: 700px;
+  box-sizing: border-box;
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d; }
+
+.reveal.page .slides section.past {
+  z-index: 12; }
+
+.reveal.page .slides section:not(.stack):before {
+  content: '';
+  position: absolute;
+  display: block;
+  width: 100%;
+  height: 100%;
+  left: 0;
+  top: 0;
+  background: rgba(0, 0, 0, 0.1);
+  -webkit-transform: translateZ(-20px);
+          transform: translateZ(-20px); }
+
+.reveal.page .slides section:not(.stack):after {
+  content: '';
+  position: absolute;
+  display: block;
+  width: 90%;
+  height: 30px;
+  left: 5%;
+  bottom: 0;
+  background: none;
+  z-index: 1;
+  border-radius: 4px;
+  box-shadow: 0px 95px 25px rgba(0, 0, 0, 0.2);
+  -webkit-transform: translateZ(-90px) rotateX(65deg); }
+
+.reveal.page .slides > section.stack {
+  padding: 0;
+  background: none; }
+
+.reveal.page .slides > section.past {
+  -webkit-transform-origin: 0% 0%;
+          transform-origin: 0% 0%;
+  -webkit-transform: translate3d(-40%, 0, 0) rotateY(-80deg);
+          transform: translate3d(-40%, 0, 0) rotateY(-80deg); }
+
+.reveal.page .slides > section.future {
+  -webkit-transform-origin: 100% 0%;
+          transform-origin: 100% 0%;
+  -webkit-transform: translate3d(0, 0, 0);
+          transform: translate3d(0, 0, 0); }
+
+.reveal.page .slides > section > section.past {
+  -webkit-transform-origin: 0% 0%;
+          transform-origin: 0% 0%;
+  -webkit-transform: translate3d(0, -40%, 0) rotateX(80deg);
+          transform: translate3d(0, -40%, 0) rotateX(80deg); }
+
+.reveal.page .slides > section > section.future {
+  -webkit-transform-origin: 0% 100%;
+          transform-origin: 0% 100%;
+  -webkit-transform: translate3d(0, 0, 0);
+          transform: translate3d(0, 0, 0); }
+
+/*********************************************
+ * FADE TRANSITION
+ *********************************************/
+.reveal .slides section[data-transition=fade],
+.reveal.fade .slides section:not([data-transition]),
+.reveal.fade .slides > section > section:not([data-transition]) {
+  -webkit-transform: none;
+          transform: none;
+  transition: opacity 0.5s; }
+
+.reveal.fade.overview .slides section,
+.reveal.fade.overview .slides > section > section {
+  transition: none; }
+
+/*********************************************
+ * NO TRANSITION
+ *********************************************/
+.reveal .slides section[data-transition=none],
+.reveal.none .slides section:not([data-transition]) {
+  -webkit-transform: none;
+          transform: none;
+  transition: none; }
+
+/*********************************************
+ * PAUSED MODE
+ *********************************************/
+.reveal .pause-overlay {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: black;
+  visibility: hidden;
+  opacity: 0;
+  z-index: 100;
+  transition: all 1s ease; }
+
+.reveal .pause-overlay .resume-button {
+  position: absolute;
+  bottom: 20px;
+  right: 20px;
+  color: #ccc;
+  border-radius: 2px;
+  padding: 6px 14px;
+  border: 2px solid #ccc;
+  font-size: 16px;
+  background: transparent;
+  cursor: pointer; }
+  .reveal .pause-overlay .resume-button:hover {
+    color: #fff;
+    border-color: #fff; }
+
+.reveal.paused .pause-overlay {
+  visibility: visible;
+  opacity: 1; }
+
+/*********************************************
+ * FALLBACK
+ *********************************************/
+.no-transforms {
+  overflow-y: auto; }
+
+.no-transforms .reveal .slides {
+  position: relative;
+  width: 80%;
+  height: auto !important;
+  top: 0;
+  left: 50%;
+  margin: 0;
+  text-align: center; }
+
+.no-transforms .reveal .controls,
+.no-transforms .reveal .progress {
+  display: none !important; }
+
+.no-transforms .reveal .slides section {
+  display: block !important;
+  opacity: 1 !important;
+  position: relative !important;
+  height: auto;
+  min-height: 0;
+  top: 0;
+  left: -50%;
+  margin: 70px 0;
+  -webkit-transform: none;
+          transform: none; }
+
+.no-transforms .reveal .slides section section {
+  left: 0; }
+
+.reveal .no-transition,
+.reveal .no-transition * {
+  transition: none !important; }
+
+/*********************************************
+ * PER-SLIDE BACKGROUNDS
+ *********************************************/
+.reveal .backgrounds {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  top: 0;
+  left: 0;
+  -webkit-perspective: 600px;
+          perspective: 600px; }
+
+.reveal .slide-background {
+  display: none;
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  opacity: 0;
+  visibility: hidden;
+  overflow: hidden;
+  background-color: transparent;
+  transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+
+.reveal .slide-background-content {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  background-position: 50% 50%;
+  background-repeat: no-repeat;
+  background-size: cover; }
+
+.reveal .slide-background.stack {
+  display: block; }
+
+.reveal .slide-background.present {
+  opacity: 1;
+  visibility: visible;
+  z-index: 2; }
+
+.print-pdf .reveal .slide-background {
+  opacity: 1 !important;
+  visibility: visible !important; }
+
+/* Video backgrounds */
+.reveal .slide-background video {
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  max-width: none;
+  max-height: none;
+  top: 0;
+  left: 0;
+  -o-object-fit: cover;
+     object-fit: cover; }
+
+.reveal .slide-background[data-background-size="contain"] video {
+  -o-object-fit: contain;
+     object-fit: contain; }
+
+/* Immediate transition style */
+.reveal[data-background-transition=none] > .backgrounds .slide-background,
+.reveal > .backgrounds .slide-background[data-background-transition=none] {
+  transition: none; }
+
+/* Slide */
+.reveal[data-background-transition=slide] > .backgrounds .slide-background,
+.reveal > .backgrounds .slide-background[data-background-transition=slide] {
+  opacity: 1;
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden; }
+
+.reveal[data-background-transition=slide] > .backgrounds .slide-background.past,
+.reveal > .backgrounds .slide-background.past[data-background-transition=slide] {
+  -webkit-transform: translate(-100%, 0);
+          transform: translate(-100%, 0); }
+
+.reveal[data-background-transition=slide] > .backgrounds .slide-background.future,
+.reveal > .backgrounds .slide-background.future[data-background-transition=slide] {
+  -webkit-transform: translate(100%, 0);
+          transform: translate(100%, 0); }
+
+.reveal[data-background-transition=slide] > .backgrounds .slide-background > .slide-background.past,
+.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=slide] {
+  -webkit-transform: translate(0, -100%);
+          transform: translate(0, -100%); }
+
+.reveal[data-background-transition=slide] > .backgrounds .slide-background > .slide-background.future,
+.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=slide] {
+  -webkit-transform: translate(0, 100%);
+          transform: translate(0, 100%); }
+
+/* Convex */
+.reveal[data-background-transition=convex] > .backgrounds .slide-background.past,
+.reveal > .backgrounds .slide-background.past[data-background-transition=convex] {
+  opacity: 0;
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0);
+          transform: translate3d(-100%, 0, 0) rotateY(-90deg) translate3d(-100%, 0, 0); }
+
+.reveal[data-background-transition=convex] > .backgrounds .slide-background.future,
+.reveal > .backgrounds .slide-background.future[data-background-transition=convex] {
+  opacity: 0;
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0);
+          transform: translate3d(100%, 0, 0) rotateY(90deg) translate3d(100%, 0, 0); }
+
+.reveal[data-background-transition=convex] > .backgrounds .slide-background > .slide-background.past,
+.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=convex] {
+  opacity: 0;
+  -webkit-transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0);
+          transform: translate3d(0, -100%, 0) rotateX(90deg) translate3d(0, -100%, 0); }
+
+.reveal[data-background-transition=convex] > .backgrounds .slide-background > .slide-background.future,
+.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=convex] {
+  opacity: 0;
+  -webkit-transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0);
+          transform: translate3d(0, 100%, 0) rotateX(-90deg) translate3d(0, 100%, 0); }
+
+/* Concave */
+.reveal[data-background-transition=concave] > .backgrounds .slide-background.past,
+.reveal > .backgrounds .slide-background.past[data-background-transition=concave] {
+  opacity: 0;
+  -webkit-transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0);
+          transform: translate3d(-100%, 0, 0) rotateY(90deg) translate3d(-100%, 0, 0); }
+
+.reveal[data-background-transition=concave] > .backgrounds .slide-background.future,
+.reveal > .backgrounds .slide-background.future[data-background-transition=concave] {
+  opacity: 0;
+  -webkit-transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0);
+          transform: translate3d(100%, 0, 0) rotateY(-90deg) translate3d(100%, 0, 0); }
+
+.reveal[data-background-transition=concave] > .backgrounds .slide-background > .slide-background.past,
+.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=concave] {
+  opacity: 0;
+  -webkit-transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0);
+          transform: translate3d(0, -100%, 0) rotateX(-90deg) translate3d(0, -100%, 0); }
+
+.reveal[data-background-transition=concave] > .backgrounds .slide-background > .slide-background.future,
+.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=concave] {
+  opacity: 0;
+  -webkit-transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0);
+          transform: translate3d(0, 100%, 0) rotateX(90deg) translate3d(0, 100%, 0); }
+
+/* Zoom */
+.reveal[data-background-transition=zoom] > .backgrounds .slide-background,
+.reveal > .backgrounds .slide-background[data-background-transition=zoom] {
+  transition-timing-function: ease; }
+
+.reveal[data-background-transition=zoom] > .backgrounds .slide-background.past,
+.reveal > .backgrounds .slide-background.past[data-background-transition=zoom] {
+  opacity: 0;
+  visibility: hidden;
+  -webkit-transform: scale(16);
+          transform: scale(16); }
+
+.reveal[data-background-transition=zoom] > .backgrounds .slide-background.future,
+.reveal > .backgrounds .slide-background.future[data-background-transition=zoom] {
+  opacity: 0;
+  visibility: hidden;
+  -webkit-transform: scale(0.2);
+          transform: scale(0.2); }
+
+.reveal[data-background-transition=zoom] > .backgrounds .slide-background > .slide-background.past,
+.reveal > .backgrounds .slide-background > .slide-background.past[data-background-transition=zoom] {
+  opacity: 0;
+  visibility: hidden;
+  -webkit-transform: scale(16);
+          transform: scale(16); }
+
+.reveal[data-background-transition=zoom] > .backgrounds .slide-background > .slide-background.future,
+.reveal > .backgrounds .slide-background > .slide-background.future[data-background-transition=zoom] {
+  opacity: 0;
+  visibility: hidden;
+  -webkit-transform: scale(0.2);
+          transform: scale(0.2); }
+
+/* Global transition speed settings */
+.reveal[data-transition-speed="fast"] > .backgrounds .slide-background {
+  transition-duration: 400ms; }
+
+.reveal[data-transition-speed="slow"] > .backgrounds .slide-background {
+  transition-duration: 1200ms; }
+
+/*********************************************
+ * OVERVIEW
+ *********************************************/
+.reveal.overview {
+  -webkit-perspective-origin: 50% 50%;
+          perspective-origin: 50% 50%;
+  -webkit-perspective: 700px;
+          perspective: 700px; }
+  .reveal.overview .slides {
+    -moz-transform-style: preserve-3d; }
+  .reveal.overview .slides section {
+    height: 100%;
+    top: 0 !important;
+    opacity: 1 !important;
+    overflow: hidden;
+    visibility: visible !important;
+    cursor: pointer;
+    box-sizing: border-box; }
+  .reveal.overview .slides section:hover,
+  .reveal.overview .slides section.present {
+    outline: 10px solid rgba(150, 150, 150, 0.4);
+    outline-offset: 10px; }
+  .reveal.overview .slides section .fragment {
+    opacity: 1;
+    transition: none; }
+  .reveal.overview .slides section:after,
+  .reveal.overview .slides section:before {
+    display: none !important; }
+  .reveal.overview .slides > section.stack {
+    padding: 0;
+    top: 0 !important;
+    background: none;
+    outline: none;
+    overflow: visible; }
+  .reveal.overview .backgrounds {
+    -webkit-perspective: inherit;
+            perspective: inherit;
+    -moz-transform-style: preserve-3d; }
+  .reveal.overview .backgrounds .slide-background {
+    opacity: 1;
+    visibility: visible;
+    outline: 10px solid rgba(150, 150, 150, 0.1);
+    outline-offset: 10px; }
+  .reveal.overview .backgrounds .slide-background.stack {
+    overflow: visible; }
+
+.reveal.overview .slides section,
+.reveal.overview-deactivating .slides section {
+  transition: none; }
+
+.reveal.overview .backgrounds .slide-background,
+.reveal.overview-deactivating .backgrounds .slide-background {
+  transition: none; }
+
+/*********************************************
+ * RTL SUPPORT
+ *********************************************/
+.reveal.rtl .slides,
+.reveal.rtl .slides h1,
+.reveal.rtl .slides h2,
+.reveal.rtl .slides h3,
+.reveal.rtl .slides h4,
+.reveal.rtl .slides h5,
+.reveal.rtl .slides h6 {
+  direction: rtl;
+  font-family: sans-serif; }
+
+.reveal.rtl pre,
+.reveal.rtl code {
+  direction: ltr; }
+
+.reveal.rtl ol,
+.reveal.rtl ul {
+  text-align: right; }
+
+.reveal.rtl .progress span {
+  float: right; }
+
+/*********************************************
+ * PARALLAX BACKGROUND
+ *********************************************/
+.reveal.has-parallax-background .backgrounds {
+  transition: all 0.8s ease; }
+
+/* Global transition speed settings */
+.reveal.has-parallax-background[data-transition-speed="fast"] .backgrounds {
+  transition-duration: 400ms; }
+
+.reveal.has-parallax-background[data-transition-speed="slow"] .backgrounds {
+  transition-duration: 1200ms; }
+
+/*********************************************
+ * LINK PREVIEW OVERLAY
+ *********************************************/
+.reveal .overlay {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  z-index: 1000;
+  background: rgba(0, 0, 0, 0.9);
+  opacity: 0;
+  visibility: hidden;
+  transition: all 0.3s ease; }
+
+.reveal .overlay.visible {
+  opacity: 1;
+  visibility: visible; }
+
+.reveal .overlay .spinner {
+  position: absolute;
+  display: block;
+  top: 50%;
+  left: 50%;
+  width: 32px;
+  height: 32px;
+  margin: -16px 0 0 -16px;
+  z-index: 10;
+  background-image: url(data:image/gif;base64,R0lGODlhIAAgAPMAAJmZmf%2F%2F%2F6%2Bvr8nJybW1tcDAwOjo6Nvb26ioqKOjo7Ozs%2FLy8vz8%2FAAAAAAAAAAAACH%2FC05FVFNDQVBFMi4wAwEAAAAh%2FhpDcmVhdGVkIHdpdGggYWpheGxvYWQuaW5mbwAh%2BQQJCgAAACwAAAAAIAAgAAAE5xDISWlhperN52JLhSSdRgwVo1ICQZRUsiwHpTJT4iowNS8vyW2icCF6k8HMMBkCEDskxTBDAZwuAkkqIfxIQyhBQBFvAQSDITM5VDW6XNE4KagNh6Bgwe60smQUB3d4Rz1ZBApnFASDd0hihh12BkE9kjAJVlycXIg7CQIFA6SlnJ87paqbSKiKoqusnbMdmDC2tXQlkUhziYtyWTxIfy6BE8WJt5YJvpJivxNaGmLHT0VnOgSYf0dZXS7APdpB309RnHOG5gDqXGLDaC457D1zZ%2FV%2FnmOM82XiHRLYKhKP1oZmADdEAAAh%2BQQJCgAAACwAAAAAIAAgAAAE6hDISWlZpOrNp1lGNRSdRpDUolIGw5RUYhhHukqFu8DsrEyqnWThGvAmhVlteBvojpTDDBUEIFwMFBRAmBkSgOrBFZogCASwBDEY%2FCZSg7GSE0gSCjQBMVG023xWBhklAnoEdhQEfyNqMIcKjhRsjEdnezB%2BA4k8gTwJhFuiW4dokXiloUepBAp5qaKpp6%2BHo7aWW54wl7obvEe0kRuoplCGepwSx2jJvqHEmGt6whJpGpfJCHmOoNHKaHx61WiSR92E4lbFoq%2BB6QDtuetcaBPnW6%2BO7wDHpIiK9SaVK5GgV543tzjgGcghAgAh%2BQQJCgAAACwAAAAAIAAgAAAE7hDISSkxpOrN5zFHNWRdhSiVoVLHspRUMoyUakyEe8PTPCATW9A14E0UvuAKMNAZKYUZCiBMuBakSQKG8G2FzUWox2AUtAQFcBKlVQoLgQReZhQlCIJesQXI5B0CBnUMOxMCenoCfTCEWBsJColTMANldx15BGs8B5wlCZ9Po6OJkwmRpnqkqnuSrayqfKmqpLajoiW5HJq7FL1Gr2mMMcKUMIiJgIemy7xZtJsTmsM4xHiKv5KMCXqfyUCJEonXPN2rAOIAmsfB3uPoAK%2B%2BG%2Bw48edZPK%2BM6hLJpQg484enXIdQFSS1u6UhksENEQAAIfkECQoAAAAsAAAAACAAIAAABOcQyEmpGKLqzWcZRVUQnZYg1aBSh2GUVEIQ2aQOE%2BG%2BcD4ntpWkZQj1JIiZIogDFFyHI0UxQwFugMSOFIPJftfVAEoZLBbcLEFhlQiqGp1Vd140AUklUN3eCA51C1EWMzMCezCBBmkxVIVHBWd3HHl9JQOIJSdSnJ0TDKChCwUJjoWMPaGqDKannasMo6WnM562R5YluZRwur0wpgqZE7NKUm%2BFNRPIhjBJxKZteWuIBMN4zRMIVIhffcgojwCF117i4nlLnY5ztRLsnOk%2BaV%2BoJY7V7m76PdkS4trKcdg0Zc0tTcKkRAAAIfkECQoAAAAsAAAAACAAIAAABO4QyEkpKqjqzScpRaVkXZWQEximw1BSCUEIlDohrft6cpKCk5xid5MNJTaAIkekKGQkWyKHkvhKsR7ARmitkAYDYRIbUQRQjWBwJRzChi9CRlBcY1UN4g0%2FVNB0AlcvcAYHRyZPdEQFYV8ccwR5HWxEJ02YmRMLnJ1xCYp0Y5idpQuhopmmC2KgojKasUQDk5BNAwwMOh2RtRq5uQuPZKGIJQIGwAwGf6I0JXMpC8C7kXWDBINFMxS4DKMAWVWAGYsAdNqW5uaRxkSKJOZKaU3tPOBZ4DuK2LATgJhkPJMgTwKCdFjyPHEnKxFCDhEAACH5BAkKAAAALAAAAAAgACAAAATzEMhJaVKp6s2nIkolIJ2WkBShpkVRWqqQrhLSEu9MZJKK9y1ZrqYK9WiClmvoUaF8gIQSNeF1Er4MNFn4SRSDARWroAIETg1iVwuHjYB1kYc1mwruwXKC9gmsJXliGxc%2BXiUCby9ydh1sOSdMkpMTBpaXBzsfhoc5l58Gm5yToAaZhaOUqjkDgCWNHAULCwOLaTmzswadEqggQwgHuQsHIoZCHQMMQgQGubVEcxOPFAcMDAYUA85eWARmfSRQCdcMe0zeP1AAygwLlJtPNAAL19DARdPzBOWSm1brJBi45soRAWQAAkrQIykShQ9wVhHCwCQCACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiRMDjI0Fd30%2FiI2UA5GSS5UDj2l6NoqgOgN4gksEBgYFf0FDqKgHnyZ9OX8HrgYHdHpcHQULXAS2qKpENRg7eAMLC7kTBaixUYFkKAzWAAnLC7FLVxLWDBLKCwaKTULgEwbLA4hJtOkSBNqITT3xEgfLpBtzE%2FjiuL04RGEBgwWhShRgQExHBAAh%2BQQJCgAAACwAAAAAIAAgAAAE7xDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfZiCqGk5dTESJeaOAlClzsJsqwiJwiqnFrb2nS9kmIcgEsjQydLiIlHehhpejaIjzh9eomSjZR%2BipslWIRLAgMDOR2DOqKogTB9pCUJBagDBXR6XB0EBkIIsaRsGGMMAxoDBgYHTKJiUYEGDAzHC9EACcUGkIgFzgwZ0QsSBcXHiQvOwgDdEwfFs0sDzt4S6BK4xYjkDOzn0unFeBzOBijIm1Dgmg5YFQwsCMjp1oJ8LyIAACH5BAkKAAAALAAAAAAgACAAAATwEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GGl6NoiPOH16iZKNlH6KmyWFOggHhEEvAwwMA0N9GBsEC6amhnVcEwavDAazGwIDaH1ipaYLBUTCGgQDA8NdHz0FpqgTBwsLqAbWAAnIA4FWKdMLGdYGEgraigbT0OITBcg5QwPT4xLrROZL6AuQAPUS7bxLpoWidY0JtxLHKhwwMJBTHgPKdEQAACH5BAkKAAAALAAAAAAgACAAAATrEMhJaVKp6s2nIkqFZF2VIBWhUsJaTokqUCoBq%2BE71SRQeyqUToLA7VxF0JDyIQh%2FMVVPMt1ECZlfcjZJ9mIKoaTl1MRIl5o4CUKXOwmyrCInCKqcWtvadL2SYhyASyNDJ0uIiUd6GAULDJCRiXo1CpGXDJOUjY%2BYip9DhToJA4RBLwMLCwVDfRgbBAaqqoZ1XBMHswsHtxtFaH1iqaoGNgAIxRpbFAgfPQSqpbgGBqUD1wBXeCYp1AYZ19JJOYgH1KwA4UBvQwXUBxPqVD9L3sbp2BNk2xvvFPJd%2BMFCN6HAAIKgNggY0KtEBAAh%2BQQJCgAAACwAAAAAIAAgAAAE6BDISWlSqerNpyJKhWRdlSAVoVLCWk6JKlAqAavhO9UkUHsqlE6CwO1cRdCQ8iEIfzFVTzLdRAmZX3I2SfYIDMaAFdTESJeaEDAIMxYFqrOUaNW4E4ObYcCXaiBVEgULe0NJaxxtYksjh2NLkZISgDgJhHthkpU4mW6blRiYmZOlh4JWkDqILwUGBnE6TYEbCgevr0N1gH4At7gHiRpFaLNrrq8HNgAJA70AWxQIH1%2BvsYMDAzZQPC9VCNkDWUhGkuE5PxJNwiUK4UfLzOlD4WvzAHaoG9nxPi5d%2BjYUqfAhhykOFwJWiAAAIfkECQoAAAAsAAAAACAAIAAABPAQyElpUqnqzaciSoVkXVUMFaFSwlpOCcMYlErAavhOMnNLNo8KsZsMZItJEIDIFSkLGQoQTNhIsFehRww2CQLKF0tYGKYSg%2BygsZIuNqJksKgbfgIGepNo2cIUB3V1B3IvNiBYNQaDSTtfhhx0CwVPI0UJe0%2Bbm4g5VgcGoqOcnjmjqDSdnhgEoamcsZuXO1aWQy8KAwOAuTYYGwi7w5h%2BKr0SJ8MFihpNbx%2B4Erq7BYBuzsdiH1jCAzoSfl0rVirNbRXlBBlLX%2BBP0XJLAPGzTkAuAOqb0WT5AH7OcdCm5B8TgRwSRKIHQtaLCwg1RAAAOwAAAAAAAAAAAA%3D%3D);
+  visibility: visible;
+  opacity: 0.6;
+  transition: all 0.3s ease; }
+
+.reveal .overlay header {
+  position: absolute;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 40px;
+  z-index: 2;
+  border-bottom: 1px solid #222; }
+
+.reveal .overlay header a {
+  display: inline-block;
+  width: 40px;
+  height: 40px;
+  line-height: 36px;
+  padding: 0 10px;
+  float: right;
+  opacity: 0.6;
+  box-sizing: border-box; }
+
+.reveal .overlay header a:hover {
+  opacity: 1; }
+
+.reveal .overlay header a .icon {
+  display: inline-block;
+  width: 20px;
+  height: 20px;
+  background-position: 50% 50%;
+  background-size: 100%;
+  background-repeat: no-repeat; }
+
+.reveal .overlay header a.close .icon {
+  background-image: url(data:image/png;base64,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); }
+
+.reveal .overlay header a.external .icon {
+  background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAAcElEQVRYR+2WSQoAIQwEzf8f7XiOMkUQxUPlGkM3hVmiQfQR9GYnH1SsAQlI4DiBqkCMoNb9y2e90IAEJPAcgdznU9+engMaeJ7Azh5Y1U67gAho4DqBqmB1buAf0MB1AlVBek83ZPkmJMGc1wAR+AAqod/B97TRpQAAAABJRU5ErkJggg==); }
+
+.reveal .overlay .viewport {
+  position: absolute;
+  display: -webkit-box;
+  display: -ms-flexbox;
+  display: flex;
+  top: 40px;
+  right: 0;
+  bottom: 0;
+  left: 0; }
+
+.reveal .overlay.overlay-preview .viewport iframe {
+  width: 100%;
+  height: 100%;
+  max-width: 100%;
+  max-height: 100%;
+  border: 0;
+  opacity: 0;
+  visibility: hidden;
+  transition: all 0.3s ease; }
+
+.reveal .overlay.overlay-preview.loaded .viewport iframe {
+  opacity: 1;
+  visibility: visible; }
+
+.reveal .overlay.overlay-preview.loaded .viewport-inner {
+  position: absolute;
+  z-index: -1;
+  left: 0;
+  top: 45%;
+  width: 100%;
+  text-align: center;
+  letter-spacing: normal; }
+
+.reveal .overlay.overlay-preview .x-frame-error {
+  opacity: 0;
+  transition: opacity 0.3s ease 0.3s; }
+
+.reveal .overlay.overlay-preview.loaded .x-frame-error {
+  opacity: 1; }
+
+.reveal .overlay.overlay-preview.loaded .spinner {
+  opacity: 0;
+  visibility: hidden;
+  -webkit-transform: scale(0.2);
+          transform: scale(0.2); }
+
+.reveal .overlay.overlay-help .viewport {
+  overflow: auto;
+  color: #fff; }
+
+.reveal .overlay.overlay-help .viewport .viewport-inner {
+  width: 600px;
+  margin: auto;
+  padding: 20px 20px 80px 20px;
+  text-align: center;
+  letter-spacing: normal; }
+
+.reveal .overlay.overlay-help .viewport .viewport-inner .title {
+  font-size: 20px; }
+
+.reveal .overlay.overlay-help .viewport .viewport-inner table {
+  border: 1px solid #fff;
+  border-collapse: collapse;
+  font-size: 16px; }
+
+.reveal .overlay.overlay-help .viewport .viewport-inner table th,
+.reveal .overlay.overlay-help .viewport .viewport-inner table td {
+  width: 200px;
+  padding: 14px;
+  border: 1px solid #fff;
+  vertical-align: middle; }
+
+.reveal .overlay.overlay-help .viewport .viewport-inner table th {
+  padding-top: 20px;
+  padding-bottom: 20px; }
+
+/*********************************************
+ * PLAYBACK COMPONENT
+ *********************************************/
+.reveal .playback {
+  position: absolute;
+  left: 15px;
+  bottom: 20px;
+  z-index: 30;
+  cursor: pointer;
+  transition: all 400ms ease;
+  -webkit-tap-highlight-color: transparent; }
+
+.reveal.overview .playback {
+  opacity: 0;
+  visibility: hidden; }
+
+/*********************************************
+ * ROLLING LINKS
+ *********************************************/
+.reveal .roll {
+  display: inline-block;
+  line-height: 1.2;
+  overflow: hidden;
+  vertical-align: top;
+  -webkit-perspective: 400px;
+          perspective: 400px;
+  -webkit-perspective-origin: 50% 50%;
+          perspective-origin: 50% 50%; }
+
+.reveal .roll:hover {
+  background: none;
+  text-shadow: none; }
+
+.reveal .roll span {
+  display: block;
+  position: relative;
+  padding: 0 2px;
+  pointer-events: none;
+  transition: all 400ms ease;
+  -webkit-transform-origin: 50% 0%;
+          transform-origin: 50% 0%;
+  -webkit-transform-style: preserve-3d;
+          transform-style: preserve-3d;
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden; }
+
+.reveal .roll:hover span {
+  background: rgba(0, 0, 0, 0.5);
+  -webkit-transform: translate3d(0px, 0px, -45px) rotateX(90deg);
+          transform: translate3d(0px, 0px, -45px) rotateX(90deg); }
+
+.reveal .roll span:after {
+  content: attr(data-title);
+  display: block;
+  position: absolute;
+  left: 0;
+  top: 0;
+  padding: 0 2px;
+  -webkit-backface-visibility: hidden;
+          backface-visibility: hidden;
+  -webkit-transform-origin: 50% 0%;
+          transform-origin: 50% 0%;
+  -webkit-transform: translate3d(0px, 110%, 0px) rotateX(-90deg);
+          transform: translate3d(0px, 110%, 0px) rotateX(-90deg); }
+
+/*********************************************
+ * SPEAKER NOTES
+ *********************************************/
+.reveal aside.notes {
+  display: none; }
+
+.reveal .speaker-notes {
+  display: none;
+  position: absolute;
+  width: 25vw;
+  height: 100%;
+  top: 0;
+  left: 100%;
+  padding: 14px 18px 14px 18px;
+  z-index: 1;
+  font-size: 18px;
+  line-height: 1.4;
+  border: 1px solid rgba(0, 0, 0, 0.05);
+  color: #222;
+  background-color: #f5f5f5;
+  overflow: auto;
+  box-sizing: border-box;
+  text-align: left;
+  font-family: Helvetica, sans-serif;
+  -webkit-overflow-scrolling: touch; }
+  .reveal .speaker-notes .notes-placeholder {
+    color: #ccc;
+    font-style: italic; }
+  .reveal .speaker-notes:focus {
+    outline: none; }
+  .reveal .speaker-notes:before {
+    content: 'Speaker notes';
+    display: block;
+    margin-bottom: 10px;
+    opacity: 0.5; }
+
+.reveal.show-notes {
+  max-width: 75vw;
+  overflow: visible; }
+
+.reveal.show-notes .speaker-notes {
+  display: block; }
+
+@media screen and (min-width: 1600px) {
+  .reveal .speaker-notes {
+    font-size: 20px; } }
+
+@media screen and (max-width: 1024px) {
+  .reveal.show-notes {
+    border-left: 0;
+    max-width: none;
+    max-height: 70%;
+    overflow: visible; }
+  .reveal.show-notes .speaker-notes {
+    top: 100%;
+    left: 0;
+    width: 100%;
+    height: 42.8571428571%; } }
+
+@media screen and (max-width: 600px) {
+  .reveal.show-notes {
+    max-height: 60%; }
+  .reveal.show-notes .speaker-notes {
+    top: 100%;
+    height: 66.6666666667%; }
+  .reveal .speaker-notes {
+    font-size: 14px; } }
+
+/*********************************************
+ * ZOOM PLUGIN
+ *********************************************/
+.zoomed .reveal *,
+.zoomed .reveal *:before,
+.zoomed .reveal *:after {
+  -webkit-backface-visibility: visible !important;
+          backface-visibility: visible !important; }
+
+.zoomed .reveal .progress,
+.zoomed .reveal .controls {
+  opacity: 0; }
+
+.zoomed .reveal .roll span {
+  background: none; }
+
+.zoomed .reveal .roll span:after {
+  visibility: hidden; }

=== added file 'openlp/core/display/html/reveal.js'
--- openlp/core/display/html/reveal.js	1970-01-01 00:00:00 +0000
+++ openlp/core/display/html/reveal.js	2019-02-13 21:39:24 +0000
@@ -0,0 +1,5586 @@
+/*!
+ * reveal.js
+ * http://revealjs.com
+ * MIT licensed
+ *
+ * Copyright (C) 2018 Hakim El Hattab, http://hakim.se
+ */
+(function( root, factory ) {
+	if( typeof define === 'function' && define.amd ) {
+		// AMD. Register as an anonymous module.
+		define( function() {
+			root.Reveal = factory();
+			return root.Reveal;
+		} );
+	} else if( typeof exports === 'object' ) {
+		// Node. Does not work with strict CommonJS.
+		module.exports = factory();
+	} else {
+		// Browser globals.
+		root.Reveal = factory();
+	}
+}( this, function() {
+
+	'use strict';
+
+	var Reveal;
+
+	// The reveal.js version
+	var VERSION = '3.7.0';
+
+	var SLIDES_SELECTOR = '.slides section',
+		HORIZONTAL_SLIDES_SELECTOR = '.slides>section',
+		VERTICAL_SLIDES_SELECTOR = '.slides>section.present>section',
+		HOME_SLIDE_SELECTOR = '.slides>section:first-of-type',
+		UA = navigator.userAgent,
+
+		// Configuration defaults, can be overridden at initialization time
+		config = {
+
+			// The "normal" size of the presentation, aspect ratio will be preserved
+			// when the presentation is scaled to fit different resolutions
+			width: 960,
+			height: 700,
+
+			// Factor of the display size that should remain empty around the content
+			margin: 0.04,
+
+			// Bounds for smallest/largest possible scale to apply to content
+			minScale: 0.2,
+			maxScale: 2.0,
+
+			// Display presentation control arrows
+			controls: true,
+
+			// Help the user learn the controls by providing hints, for example by
+			// bouncing the down arrow when they first encounter a vertical slide
+			controlsTutorial: true,
+
+			// Determines where controls appear, "edges" or "bottom-right"
+			controlsLayout: 'bottom-right',
+
+			// Visibility rule for backwards navigation arrows; "faded", "hidden"
+			// or "visible"
+			controlsBackArrows: 'faded',
+
+			// Display a presentation progress bar
+			progress: true,
+
+			// Display the page number of the current slide
+			slideNumber: false,
+
+			// Use 1 based indexing for # links to match slide number (default is zero
+			// based)
+			hashOneBasedIndex: false,
+
+			// Determine which displays to show the slide number on
+			showSlideNumber: 'all',
+
+			// Push each slide change to the browser history
+			history: false,
+
+			// Enable keyboard shortcuts for navigation
+			keyboard: true,
+
+			// Optional function that blocks keyboard events when retuning false
+			keyboardCondition: null,
+
+			// Enable the slide overview mode
+			overview: true,
+
+			// Disables the default reveal.js slide layout so that you can use
+			// custom CSS layout
+			disableLayout: false,
+
+			// Vertical centering of slides
+			center: true,
+
+			// Enables touch navigation on devices with touch input
+			touch: true,
+
+			// Loop the presentation
+			loop: false,
+
+			// Change the presentation direction to be RTL
+			rtl: false,
+
+			// Randomizes the order of slides each time the presentation loads
+			shuffle: false,
+
+			// Turns fragments on and off globally
+			fragments: true,
+
+			// Flags whether to include the current fragment in the URL,
+			// so that reloading brings you to the same fragment position
+			fragmentInURL: false,
+
+			// Flags if the presentation is running in an embedded mode,
+			// i.e. contained within a limited portion of the screen
+			embedded: false,
+
+			// Flags if we should show a help overlay when the question-mark
+			// key is pressed
+			help: true,
+
+			// Flags if it should be possible to pause the presentation (blackout)
+			pause: true,
+
+			// Flags if speaker notes should be visible to all viewers
+			showNotes: false,
+
+			// Global override for autolaying embedded media (video/audio/iframe)
+			// - null:   Media will only autoplay if data-autoplay is present
+			// - true:   All media will autoplay, regardless of individual setting
+			// - false:  No media will autoplay, regardless of individual setting
+			autoPlayMedia: null,
+
+			// Controls automatic progression to the next slide
+			// - 0:      Auto-sliding only happens if the data-autoslide HTML attribute
+			//           is present on the current slide or fragment
+			// - 1+:     All slides will progress automatically at the given interval
+			// - false:  No auto-sliding, even if data-autoslide is present
+			autoSlide: 0,
+
+			// Stop auto-sliding after user input
+			autoSlideStoppable: true,
+
+			// Use this method for navigation when auto-sliding (defaults to navigateNext)
+			autoSlideMethod: null,
+
+			// Specify the average time in seconds that you think you will spend
+			// presenting each slide. This is used to show a pacing timer in the
+			// speaker view
+			defaultTiming: null,
+
+			// Enable slide navigation via mouse wheel
+			mouseWheel: false,
+
+			// Apply a 3D roll to links on hover
+			rollingLinks: false,
+
+			// Hides the address bar on mobile devices
+			hideAddressBar: true,
+
+			// Opens links in an iframe preview overlay
+			// Add `data-preview-link` and `data-preview-link="false"` to customise each link
+			// individually
+			previewLinks: false,
+
+			// Exposes the reveal.js API through window.postMessage
+			postMessage: true,
+
+			// Dispatches all reveal.js events to the parent window through postMessage
+			postMessageEvents: false,
+
+			// Focuses body when page changes visibility to ensure keyboard shortcuts work
+			focusBodyOnPageVisibilityChange: true,
+
+			// Transition style
+			transition: 'slide', // none/fade/slide/convex/concave/zoom
+
+			// Transition speed
+			transitionSpeed: 'default', // default/fast/slow
+
+			// Transition style for full page slide backgrounds
+			backgroundTransition: 'fade', // none/fade/slide/convex/concave/zoom
+
+			// Parallax background image
+			parallaxBackgroundImage: '', // CSS syntax, e.g. "a.jpg"
+
+			// Parallax background size
+			parallaxBackgroundSize: '', // CSS syntax, e.g. "3000px 2000px"
+
+			// Parallax background repeat
+			parallaxBackgroundRepeat: '', // repeat/repeat-x/repeat-y/no-repeat/initial/inherit
+
+			// Parallax background position
+			parallaxBackgroundPosition: '', // CSS syntax, e.g. "top left"
+
+			// Amount of pixels to move the parallax background per slide step
+			parallaxBackgroundHorizontal: null,
+			parallaxBackgroundVertical: null,
+
+			// The maximum number of pages a single slide can expand onto when printing
+			// to PDF, unlimited by default
+			pdfMaxPagesPerSlide: Number.POSITIVE_INFINITY,
+
+			// Prints each fragment on a separate slide
+			pdfSeparateFragments: true,
+
+			// Offset used to reduce the height of content within exported PDF pages.
+			// This exists to account for environment differences based on how you
+			// print to PDF. CLI printing options, like phantomjs and wkpdf, can end
+			// on precisely the total height of the document whereas in-browser
+			// printing has to end one pixel before.
+			pdfPageHeightOffset: -1,
+
+			// Number of slides away from the current that are visible
+			viewDistance: 3,
+
+			// The display mode that will be used to show slides
+			display: 'block',
+
+			// Script dependencies to load
+			dependencies: []
+
+		},
+
+		// Flags if Reveal.initialize() has been called
+		initialized = false,
+
+		// Flags if reveal.js is loaded (has dispatched the 'ready' event)
+		loaded = false,
+
+		// Flags if the overview mode is currently active
+		overview = false,
+
+		// Holds the dimensions of our overview slides, including margins
+		overviewSlideWidth = null,
+		overviewSlideHeight = null,
+
+		// The horizontal and vertical index of the currently active slide
+		indexh,
+		indexv,
+
+		// The previous and current slide HTML elements
+		previousSlide,
+		currentSlide,
+
+		previousBackground,
+
+		// Remember which directions that the user has navigated towards
+		hasNavigatedRight = false,
+		hasNavigatedDown = false,
+
+		// Slides may hold a data-state attribute which we pick up and apply
+		// as a class to the body. This list contains the combined state of
+		// all current slides.
+		state = [],
+
+		// The current scale of the presentation (see width/height config)
+		scale = 1,
+
+		// CSS transform that is currently applied to the slides container,
+		// split into two groups
+		slidesTransform = { layout: '', overview: '' },
+
+		// Cached references to DOM elements
+		dom = {},
+
+		// Features supported by the browser, see #checkCapabilities()
+		features = {},
+
+		// Client is a mobile device, see #checkCapabilities()
+		isMobileDevice,
+
+		// Client is a desktop Chrome, see #checkCapabilities()
+		isChrome,
+
+		// Throttles mouse wheel navigation
+		lastMouseWheelStep = 0,
+
+		// Delays updates to the URL due to a Chrome thumbnailer bug
+		writeURLTimeout = 0,
+
+		// Flags if the interaction event listeners are bound
+		eventsAreBound = false,
+
+		// The current auto-slide duration
+		autoSlide = 0,
+
+		// Auto slide properties
+		autoSlidePlayer,
+		autoSlideTimeout = 0,
+		autoSlideStartTime = -1,
+		autoSlidePaused = false,
+
+		// Holds information about the currently ongoing touch input
+		touch = {
+			startX: 0,
+			startY: 0,
+			startSpan: 0,
+			startCount: 0,
+			captured: false,
+			threshold: 40
+		},
+
+		// Holds information about the keyboard shortcuts
+		keyboardShortcuts = {
+			'N  ,  SPACE':			'Next slide',
+			'P':					'Previous slide',
+			'&#8592;  ,  H':		'Navigate left',
+			'&#8594;  ,  L':		'Navigate right',
+			'&#8593;  ,  K':		'Navigate up',
+			'&#8595;  ,  J':		'Navigate down',
+			'Home':					'First slide',
+			'End':					'Last slide',
+			'B  ,  .':				'Pause',
+			'F':					'Fullscreen',
+			'ESC, O':				'Slide overview'
+		},
+
+		// Holds custom key code mappings
+		registeredKeyBindings = {};
+
+	/**
+	 * Starts up the presentation if the client is capable.
+	 */
+	function initialize( options ) {
+
+		// Make sure we only initialize once
+		if( initialized === true ) return;
+
+		initialized = true;
+
+		checkCapabilities();
+
+		if( !features.transforms2d && !features.transforms3d ) {
+			document.body.setAttribute( 'class', 'no-transforms' );
+
+			// Since JS won't be running any further, we load all lazy
+			// loading elements upfront
+			var images = toArray( document.getElementsByTagName( 'img' ) ),
+				iframes = toArray( document.getElementsByTagName( 'iframe' ) );
+
+			var lazyLoadable = images.concat( iframes );
+
+			for( var i = 0, len = lazyLoadable.length; i < len; i++ ) {
+				var element = lazyLoadable[i];
+				if( element.getAttribute( 'data-src' ) ) {
+					element.setAttribute( 'src', element.getAttribute( 'data-src' ) );
+					element.removeAttribute( 'data-src' );
+				}
+			}
+
+			// If the browser doesn't support core features we won't be
+			// using JavaScript to control the presentation
+			return;
+		}
+
+		// Cache references to key DOM elements
+		dom.wrapper = document.querySelector( '.reveal' );
+		dom.slides = document.querySelector( '.reveal .slides' );
+
+		// Force a layout when the whole page, incl fonts, has loaded
+		window.addEventListener( 'load', layout, false );
+
+		var query = Reveal.getQueryHash();
+
+		// Do not accept new dependencies via query config to avoid
+		// the potential of malicious script injection
+		if( typeof query['dependencies'] !== 'undefined' ) delete query['dependencies'];
+
+		// Copy options over to our config object
+		extend( config, options );
+		extend( config, query );
+
+		// Hide the address bar in mobile browsers
+		hideAddressBar();
+
+		// Loads the dependencies and continues to #start() once done
+		load();
+
+	}
+
+	/**
+	 * Restarts up the presentation if the client is capable.
+	 */
+    function reinitialize() {
+        initialized = false;
+        initialize(config);
+    }
+
+	/**
+	 * Inspect the client to see what it's capable of, this
+	 * should only happens once per runtime.
+	 */
+	function checkCapabilities() {
+
+		isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( UA );
+		isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
+
+		var testElement = document.createElement( 'div' );
+
+		features.transforms3d = 'WebkitPerspective' in testElement.style ||
+								'MozPerspective' in testElement.style ||
+								'msPerspective' in testElement.style ||
+								'OPerspective' in testElement.style ||
+								'perspective' in testElement.style;
+
+		features.transforms2d = 'WebkitTransform' in testElement.style ||
+								'MozTransform' in testElement.style ||
+								'msTransform' in testElement.style ||
+								'OTransform' in testElement.style ||
+								'transform' in testElement.style;
+
+		features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
+		features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';
+
+		features.canvas = !!document.createElement( 'canvas' ).getContext;
+
+		// Transitions in the overview are disabled in desktop and
+		// Safari due to lag
+		features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( UA );
+
+		// Flags if we should use zoom instead of transform to scale
+		// up slides. Zoom produces crisper results but has a lot of
+		// xbrowser quirks so we only use it in whitelsited browsers.
+		features.zoom = 'zoom' in testElement.style && !isMobileDevice &&
+						( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
+
+	}
+
+	/**
+	 * Loads the dependencies of reveal.js. Dependencies are
+	 * defined via the configuration option 'dependencies'
+	 * and will be loaded prior to starting/binding reveal.js.
+	 * Some dependencies may have an 'async' flag, if so they
+	 * will load after reveal.js has been started up.
+	 */
+	function load() {
+
+		var scripts = [],
+			scriptsAsync = [],
+			scriptsToPreload = 0;
+
+		// Called once synchronous scripts finish loading
+		function proceed() {
+			if( scriptsAsync.length ) {
+				// Load asynchronous scripts
+				head.js.apply( null, scriptsAsync );
+			}
+
+			start();
+		}
+
+		function loadScript( s ) {
+			head.ready( s.src.match( /([\w\d_\-]*)\.?js(\?[\w\d.=&]*)?$|[^\\\/]*$/i )[0], function() {
+				// Extension may contain callback functions
+				if( typeof s.callback === 'function' ) {
+					s.callback.apply( this );
+				}
+
+				if( --scriptsToPreload === 0 ) {
+					proceed();
+				}
+			});
+		}
+
+		for( var i = 0, len = config.dependencies.length; i < len; i++ ) {
+			var s = config.dependencies[i];
+
+			// Load if there's no condition or the condition is truthy
+			if( !s.condition || s.condition() ) {
+				if( s.async ) {
+					scriptsAsync.push( s.src );
+				}
+				else {
+					scripts.push( s.src );
+				}
+
+				loadScript( s );
+			}
+		}
+
+		if( scripts.length ) {
+			scriptsToPreload = scripts.length;
+
+			// Load synchronous scripts
+			head.js.apply( null, scripts );
+		}
+		else {
+			proceed();
+		}
+
+	}
+
+	/**
+	 * Starts up reveal.js by binding input events and navigating
+	 * to the current URL deeplink if there is one.
+	 */
+	function start() {
+
+		loaded = true;
+
+		// Make sure we've got all the DOM elements we need
+		setupDOM();
+
+		// Listen to messages posted to this window
+		setupPostMessage();
+
+		// Prevent the slides from being scrolled out of view
+		setupScrollPrevention();
+
+		// Resets all vertical slides so that only the first is visible
+		resetVerticalSlides();
+
+		// Updates the presentation to match the current configuration values
+		configure();
+
+		// Read the initial hash
+		readURL();
+
+		// Update all backgrounds
+		updateBackground( true );
+
+		// Notify listeners that the presentation is ready but use a 1ms
+		// timeout to ensure it's not fired synchronously after #initialize()
+		setTimeout( function() {
+			// Enable transitions now that we're loaded
+			dom.slides.classList.remove( 'no-transition' );
+
+			dom.wrapper.classList.add( 'ready' );
+
+			dispatchEvent( 'ready', {
+				'indexh': indexh,
+				'indexv': indexv,
+				'currentSlide': currentSlide
+			} );
+		}, 1 );
+
+		// Special setup and config is required when printing to PDF
+		if( isPrintingPDF() ) {
+			removeEventListeners();
+
+			// The document needs to have loaded for the PDF layout
+			// measurements to be accurate
+			if( document.readyState === 'complete' ) {
+				setupPDF();
+			}
+			else {
+				window.addEventListener( 'load', setupPDF );
+			}
+		}
+
+	}
+
+	/**
+	 * Finds and stores references to DOM elements which are
+	 * required by the presentation. If a required element is
+	 * not found, it is created.
+	 */
+	function setupDOM() {
+
+		// Prevent transitions while we're loading
+		dom.slides.classList.add( 'no-transition' );
+
+		if( isMobileDevice ) {
+			dom.wrapper.classList.add( 'no-hover' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'no-hover' );
+		}
+
+		if( /iphone/gi.test( UA ) ) {
+			dom.wrapper.classList.add( 'ua-iphone' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'ua-iphone' );
+		}
+
+		// Background element
+		dom.background = createSingletonNode( dom.wrapper, 'div', 'backgrounds', null );
+
+		// Progress bar
+		dom.progress = createSingletonNode( dom.wrapper, 'div', 'progress', '<span></span>' );
+		dom.progressbar = dom.progress.querySelector( 'span' );
+
+		// Arrow controls
+		dom.controls = createSingletonNode( dom.wrapper, 'aside', 'controls',
+			'<button class="navigate-left" aria-label="previous slide"><div class="controls-arrow"></div></button>' +
+			'<button class="navigate-right" aria-label="next slide"><div class="controls-arrow"></div></button>' +
+			'<button class="navigate-up" aria-label="above slide"><div class="controls-arrow"></div></button>' +
+			'<button class="navigate-down" aria-label="below slide"><div class="controls-arrow"></div></button>' );
+
+		// Slide number
+		dom.slideNumber = createSingletonNode( dom.wrapper, 'div', 'slide-number', '' );
+
+		// Element containing notes that are visible to the audience
+		dom.speakerNotes = createSingletonNode( dom.wrapper, 'div', 'speaker-notes', null );
+		dom.speakerNotes.setAttribute( 'data-prevent-swipe', '' );
+		dom.speakerNotes.setAttribute( 'tabindex', '0' );
+
+		// Overlay graphic which is displayed during the paused mode
+		dom.pauseOverlay = createSingletonNode( dom.wrapper, 'div', 'pause-overlay', '<button class="resume-button">Resume presentation</button>' );
+		dom.resumeButton = dom.pauseOverlay.querySelector( '.resume-button' );
+
+		dom.wrapper.setAttribute( 'role', 'application' );
+
+		// There can be multiple instances of controls throughout the page
+		dom.controlsLeft = toArray( document.querySelectorAll( '.navigate-left' ) );
+		dom.controlsRight = toArray( document.querySelectorAll( '.navigate-right' ) );
+		dom.controlsUp = toArray( document.querySelectorAll( '.navigate-up' ) );
+		dom.controlsDown = toArray( document.querySelectorAll( '.navigate-down' ) );
+		dom.controlsPrev = toArray( document.querySelectorAll( '.navigate-prev' ) );
+		dom.controlsNext = toArray( document.querySelectorAll( '.navigate-next' ) );
+
+		// The right and down arrows in the standard reveal.js controls
+		dom.controlsRightArrow = dom.controls.querySelector( '.navigate-right' );
+		dom.controlsDownArrow = dom.controls.querySelector( '.navigate-down' );
+
+		dom.statusDiv = createStatusDiv();
+	}
+
+	/**
+	 * Creates a hidden div with role aria-live to announce the
+	 * current slide content. Hide the div off-screen to make it
+	 * available only to Assistive Technologies.
+	 *
+	 * @return {HTMLElement}
+	 */
+	function createStatusDiv() {
+
+		var statusDiv = document.getElementById( 'aria-status-div' );
+		if( !statusDiv ) {
+			statusDiv = document.createElement( 'div' );
+			statusDiv.style.position = 'absolute';
+			statusDiv.style.height = '1px';
+			statusDiv.style.width = '1px';
+			statusDiv.style.overflow = 'hidden';
+			statusDiv.style.clip = 'rect( 1px, 1px, 1px, 1px )';
+			statusDiv.setAttribute( 'id', 'aria-status-div' );
+			statusDiv.setAttribute( 'aria-live', 'polite' );
+			statusDiv.setAttribute( 'aria-atomic','true' );
+			dom.wrapper.appendChild( statusDiv );
+		}
+		return statusDiv;
+
+	}
+
+	/**
+	 * Converts the given HTML element into a string of text
+	 * that can be announced to a screen reader. Hidden
+	 * elements are excluded.
+	 */
+	function getStatusText( node ) {
+
+		var text = '';
+
+		// Text node
+		if( node.nodeType === 3 ) {
+			text += node.textContent;
+		}
+		// Element node
+		else if( node.nodeType === 1 ) {
+
+			var isAriaHidden = node.getAttribute( 'aria-hidden' );
+			var isDisplayHidden = window.getComputedStyle( node )['display'] === 'none';
+			if( isAriaHidden !== 'true' && !isDisplayHidden ) {
+
+				toArray( node.childNodes ).forEach( function( child ) {
+					text += getStatusText( child );
+				} );
+
+			}
+
+		}
+
+		return text;
+
+	}
+
+	/**
+	 * Configures the presentation for printing to a static
+	 * PDF.
+	 */
+	function setupPDF() {
+
+		var slideSize = getComputedSlideSize( window.innerWidth, window.innerHeight );
+
+		// Dimensions of the PDF pages
+		var pageWidth = Math.floor( slideSize.width * ( 1 + config.margin ) ),
+			pageHeight = Math.floor( slideSize.height * ( 1 + config.margin ) );
+
+		// Dimensions of slides within the pages
+		var slideWidth = slideSize.width,
+			slideHeight = slideSize.height;
+
+		// Let the browser know what page size we want to print
+		injectStyleSheet( '@page{size:'+ pageWidth +'px '+ pageHeight +'px; margin: 0px;}' );
+
+		// Limit the size of certain elements to the dimensions of the slide
+		injectStyleSheet( '.reveal section>img, .reveal section>video, .reveal section>iframe{max-width: '+ slideWidth +'px; max-height:'+ slideHeight +'px}' );
+
+		document.body.classList.add( 'print-pdf' );
+		document.body.style.width = pageWidth + 'px';
+		document.body.style.height = pageHeight + 'px';
+
+		// Make sure stretch elements fit on slide
+		layoutSlideContents( slideWidth, slideHeight );
+
+		// Add each slide's index as attributes on itself, we need these
+		// indices to generate slide numbers below
+		toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( hslide, h ) {
+			hslide.setAttribute( 'data-index-h', h );
+
+			if( hslide.classList.contains( 'stack' ) ) {
+				toArray( hslide.querySelectorAll( 'section' ) ).forEach( function( vslide, v ) {
+					vslide.setAttribute( 'data-index-h', h );
+					vslide.setAttribute( 'data-index-v', v );
+				} );
+			}
+		} );
+
+		// Slide and slide background layout
+		toArray( dom.wrapper.querySelectorAll( SLIDES_SELECTOR ) ).forEach( function( slide ) {
+
+			// Vertical stacks are not centred since their section
+			// children will be
+			if( slide.classList.contains( 'stack' ) === false ) {
+				// Center the slide inside of the page, giving the slide some margin
+				var left = ( pageWidth - slideWidth ) / 2,
+					top = ( pageHeight - slideHeight ) / 2;
+
+				var contentHeight = slide.scrollHeight;
+				var numberOfPages = Math.max( Math.ceil( contentHeight / pageHeight ), 1 );
+
+				// Adhere to configured pages per slide limit
+				numberOfPages = Math.min( numberOfPages, config.pdfMaxPagesPerSlide );
+
+				// Center slides vertically
+				if( numberOfPages === 1 && config.center || slide.classList.contains( 'center' ) ) {
+					top = Math.max( ( pageHeight - contentHeight ) / 2, 0 );
+				}
+
+				// Wrap the slide in a page element and hide its overflow
+				// so that no page ever flows onto another
+				var page = document.createElement( 'div' );
+				page.className = 'pdf-page';
+				page.style.height = ( ( pageHeight + config.pdfPageHeightOffset ) * numberOfPages ) + 'px';
+				slide.parentNode.insertBefore( page, slide );
+				page.appendChild( slide );
+
+				// Position the slide inside of the page
+				slide.style.left = left + 'px';
+				slide.style.top = top + 'px';
+				slide.style.width = slideWidth + 'px';
+
+				if( slide.slideBackgroundElement ) {
+					page.insertBefore( slide.slideBackgroundElement, slide );
+				}
+
+				// Inject notes if `showNotes` is enabled
+				if( config.showNotes ) {
+
+					// Are there notes for this slide?
+					var notes = getSlideNotes( slide );
+					if( notes ) {
+
+						var notesSpacing = 8;
+						var notesLayout = typeof config.showNotes === 'string' ? config.showNotes : 'inline';
+						var notesElement = document.createElement( 'div' );
+						notesElement.classList.add( 'speaker-notes' );
+						notesElement.classList.add( 'speaker-notes-pdf' );
+						notesElement.setAttribute( 'data-layout', notesLayout );
+						notesElement.innerHTML = notes;
+
+						if( notesLayout === 'separate-page' ) {
+							page.parentNode.insertBefore( notesElement, page.nextSibling );
+						}
+						else {
+							notesElement.style.left = notesSpacing + 'px';
+							notesElement.style.bottom = notesSpacing + 'px';
+							notesElement.style.width = ( pageWidth - notesSpacing*2 ) + 'px';
+							page.appendChild( notesElement );
+						}
+
+					}
+
+				}
+
+				// Inject slide numbers if `slideNumbers` are enabled
+				if( config.slideNumber && /all|print/i.test( config.showSlideNumber ) ) {
+					var slideNumberH = parseInt( slide.getAttribute( 'data-index-h' ), 10 ) + 1,
+						slideNumberV = parseInt( slide.getAttribute( 'data-index-v' ), 10 ) + 1;
+
+					var numberElement = document.createElement( 'div' );
+					numberElement.classList.add( 'slide-number' );
+					numberElement.classList.add( 'slide-number-pdf' );
+					numberElement.innerHTML = formatSlideNumber( slideNumberH, '.', slideNumberV );
+					page.appendChild( numberElement );
+				}
+
+				// Copy page and show fragments one after another
+				if( config.pdfSeparateFragments ) {
+
+					// Each fragment 'group' is an array containing one or more
+					// fragments. Multiple fragments that appear at the same time
+					// are part of the same group.
+					var fragmentGroups = sortFragments( page.querySelectorAll( '.fragment' ), true );
+
+					var previousFragmentStep;
+					var previousPage;
+
+					fragmentGroups.forEach( function( fragments ) {
+
+						// Remove 'current-fragment' from the previous group
+						if( previousFragmentStep ) {
+							previousFragmentStep.forEach( function( fragment ) {
+								fragment.classList.remove( 'current-fragment' );
+							} );
+						}
+
+						// Show the fragments for the current index
+						fragments.forEach( function( fragment ) {
+							fragment.classList.add( 'visible', 'current-fragment' );
+						} );
+
+						// Create a separate page for the current fragment state
+						var clonedPage = page.cloneNode( true );
+						page.parentNode.insertBefore( clonedPage, ( previousPage || page ).nextSibling );
+
+						previousFragmentStep = fragments;
+						previousPage = clonedPage;
+
+					} );
+
+					// Reset the first/original page so that all fragments are hidden
+					fragmentGroups.forEach( function( fragments ) {
+						fragments.forEach( function( fragment ) {
+							fragment.classList.remove( 'visible', 'current-fragment' );
+						} );
+					} );
+
+				}
+				// Show all fragments
+				else {
+					toArray( page.querySelectorAll( '.fragment:not(.fade-out)' ) ).forEach( function( fragment ) {
+						fragment.classList.add( 'visible' );
+					} );
+				}
+
+			}
+
+		} );
+
+		// Notify subscribers that the PDF layout is good to go
+		dispatchEvent( 'pdf-ready' );
+
+	}
+
+	/**
+	 * This is an unfortunate necessity. Some actions – such as
+	 * an input field being focused in an iframe or using the
+	 * keyboard to expand text selection beyond the bounds of
+	 * a slide – can trigger our content to be pushed out of view.
+	 * This scrolling can not be prevented by hiding overflow in
+	 * CSS (we already do) so we have to resort to repeatedly
+	 * checking if the slides have been offset :(
+	 */
+	function setupScrollPrevention() {
+
+		setInterval( function() {
+			if( dom.wrapper.scrollTop !== 0 || dom.wrapper.scrollLeft !== 0 ) {
+				dom.wrapper.scrollTop = 0;
+				dom.wrapper.scrollLeft = 0;
+			}
+		}, 1000 );
+
+	}
+
+	/**
+	 * Creates an HTML element and returns a reference to it.
+	 * If the element already exists the existing instance will
+	 * be returned.
+	 *
+	 * @param {HTMLElement} container
+	 * @param {string} tagname
+	 * @param {string} classname
+	 * @param {string} innerHTML
+	 *
+	 * @return {HTMLElement}
+	 */
+	function createSingletonNode( container, tagname, classname, innerHTML ) {
+
+		// Find all nodes matching the description
+		var nodes = container.querySelectorAll( '.' + classname );
+
+		// Check all matches to find one which is a direct child of
+		// the specified container
+		for( var i = 0; i < nodes.length; i++ ) {
+			var testNode = nodes[i];
+			if( testNode.parentNode === container ) {
+				return testNode;
+			}
+		}
+
+		// If no node was found, create it now
+		var node = document.createElement( tagname );
+		node.className = classname;
+		if( typeof innerHTML === 'string' ) {
+			node.innerHTML = innerHTML;
+		}
+		container.appendChild( node );
+
+		return node;
+
+	}
+
+	/**
+	 * Creates the slide background elements and appends them
+	 * to the background container. One element is created per
+	 * slide no matter if the given slide has visible background.
+	 */
+	function createBackgrounds() {
+
+		var printMode = isPrintingPDF();
+
+		// Clear prior backgrounds
+		dom.background.innerHTML = '';
+		dom.background.classList.add( 'no-transition' );
+
+		// Iterate over all horizontal slides
+		toArray( dom.wrapper.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ).forEach( function( slideh ) {
+
+			var backgroundStack = createBackground( slideh, dom.background );
+
+			// Iterate over all vertical slides
+			toArray( slideh.querySelectorAll( 'section' ) ).forEach( function( slidev ) {
+
+				createBackground( slidev, backgroundStack );
+
+				backgroundStack.classList.add( 'stack' );
+
+			} );
+
+		} );
+
+		// Add parallax background if specified
+		if( config.parallaxBackgroundImage ) {
+
+			dom.background.style.backgroundImage = 'url("' + config.parallaxBackgroundImage + '")';
+			dom.background.style.backgroundSize = config.parallaxBackgroundSize;
+			dom.background.style.backgroundRepeat = config.parallaxBackgroundRepeat;
+			dom.background.style.backgroundPosition = config.parallaxBackgroundPosition;
+
+			// Make sure the below properties are set on the element - these properties are
+			// needed for proper transitions to be set on the element via CSS. To remove
+			// annoying background slide-in effect when the presentation starts, apply
+			// these properties after short time delay
+			setTimeout( function() {
+				dom.wrapper.classList.add( 'has-parallax-background' );
+			}, 1 );
+
+		}
+		else {
+
+			dom.background.style.backgroundImage = '';
+			dom.wrapper.classList.remove( 'has-parallax-background' );
+
+		}
+
+	}
+
+	/**
+	 * Creates a background for the given slide.
+	 *
+	 * @param {HTMLElement} slide
+	 * @param {HTMLElement} container The element that the background
+	 * should be appended to
+	 * @return {HTMLElement} New background div
+	 */
+	function createBackground( slide, container ) {
+
+
+		// Main slide background element
+		var element = document.createElement( 'div' );
+		element.className = 'slide-background ' + slide.className.replace( /present|past|future/, '' );
+
+		// Inner background element that wraps images/videos/iframes
+		var contentElement = document.createElement( 'div' );
+		contentElement.className = 'slide-background-content';
+
+		element.appendChild( contentElement );
+		container.appendChild( element );
+
+		slide.slideBackgroundElement = element;
+		slide.slideBackgroundContentElement = contentElement;
+
+		// Syncs the background to reflect all current background settings
+		syncBackground( slide );
+
+		return element;
+
+	}
+
+	/**
+	 * Renders all of the visual properties of a slide background
+	 * based on the various background attributes.
+	 *
+	 * @param {HTMLElement} slide
+	 */
+	function syncBackground( slide ) {
+
+		var element = slide.slideBackgroundElement,
+			contentElement = slide.slideBackgroundContentElement;
+
+		// Reset the prior background state in case this is not the
+		// initial sync
+		slide.classList.remove( 'has-dark-background' );
+		slide.classList.remove( 'has-light-background' );
+
+		element.removeAttribute( 'data-loaded' );
+		element.removeAttribute( 'data-background-hash' );
+		element.removeAttribute( 'data-background-size' );
+		element.removeAttribute( 'data-background-transition' );
+		element.style.backgroundColor = '';
+
+		contentElement.style.backgroundSize = '';
+		contentElement.style.backgroundRepeat = '';
+		contentElement.style.backgroundPosition = '';
+		contentElement.style.backgroundImage = '';
+		contentElement.style.opacity = '';
+		contentElement.innerHTML = '';
+
+		var data = {
+			background: slide.getAttribute( 'data-background' ),
+			backgroundSize: slide.getAttribute( 'data-background-size' ),
+			backgroundImage: slide.getAttribute( 'data-background-image' ),
+			backgroundVideo: slide.getAttribute( 'data-background-video' ),
+			backgroundIframe: slide.getAttribute( 'data-background-iframe' ),
+			backgroundColor: slide.getAttribute( 'data-background-color' ),
+			backgroundRepeat: slide.getAttribute( 'data-background-repeat' ),
+			backgroundPosition: slide.getAttribute( 'data-background-position' ),
+			backgroundTransition: slide.getAttribute( 'data-background-transition' ),
+			backgroundOpacity: slide.getAttribute( 'data-background-opacity' )
+		};
+
+		if( data.background ) {
+			// Auto-wrap image urls in url(...)
+			if( /^(http|file|\/\/)/gi.test( data.background ) || /\.(svg|png|jpg|jpeg|gif|bmp)([?#\s]|$)/gi.test( data.background ) ) {
+				slide.setAttribute( 'data-background-image', data.background );
+			}
+			else {
+				element.style.background = data.background;
+			}
+		}
+
+		// Create a hash for this combination of background settings.
+		// This is used to determine when two slide backgrounds are
+		// the same.
+		if( data.background || data.backgroundColor || data.backgroundImage || data.backgroundVideo || data.backgroundIframe ) {
+			element.setAttribute( 'data-background-hash', data.background +
+															data.backgroundSize +
+															data.backgroundImage +
+															data.backgroundVideo +
+															data.backgroundIframe +
+															data.backgroundColor +
+															data.backgroundRepeat +
+															data.backgroundPosition +
+															data.backgroundTransition +
+															data.backgroundOpacity );
+		}
+
+		// Additional and optional background properties
+		if( data.backgroundSize ) element.setAttribute( 'data-background-size', data.backgroundSize );
+		if( data.backgroundColor ) element.style.backgroundColor = data.backgroundColor;
+		if( data.backgroundTransition ) element.setAttribute( 'data-background-transition', data.backgroundTransition );
+
+		// Background image options are set on the content wrapper
+		if( data.backgroundSize ) contentElement.style.backgroundSize = data.backgroundSize;
+		if( data.backgroundRepeat ) contentElement.style.backgroundRepeat = data.backgroundRepeat;
+		if( data.backgroundPosition ) contentElement.style.backgroundPosition = data.backgroundPosition;
+		if( data.backgroundOpacity ) contentElement.style.opacity = data.backgroundOpacity;
+
+		// If this slide has a background color, add a class that
+		// signals if it is light or dark. If the slide has no background
+		// color, no class will be set
+		var computedBackgroundStyle = window.getComputedStyle( element );
+		if( computedBackgroundStyle && computedBackgroundStyle.backgroundColor ) {
+			var rgb = colorToRgb( computedBackgroundStyle.backgroundColor );
+
+			// Ignore fully transparent backgrounds. Some browsers return
+			// rgba(0,0,0,0) when reading the computed background color of
+			// an element with no background
+			if( rgb && rgb.a !== 0 ) {
+				if( colorBrightness( computedBackgroundStyle.backgroundColor ) < 128 ) {
+					slide.classList.add( 'has-dark-background' );
+				}
+				else {
+					slide.classList.add( 'has-light-background' );
+				}
+			}
+		}
+
+	}
+
+	/**
+	 * Registers a listener to postMessage events, this makes it
+	 * possible to call all reveal.js API methods from another
+	 * window. For example:
+	 *
+	 * revealWindow.postMessage( JSON.stringify({
+	 *   method: 'slide',
+	 *   args: [ 2 ]
+	 * }), '*' );
+	 */
+	function setupPostMessage() {
+
+		if( config.postMessage ) {
+			window.addEventListener( 'message', function ( event ) {
+				var data = event.data;
+
+				// Make sure we're dealing with JSON
+				if( typeof data === 'string' && data.charAt( 0 ) === '{' && data.charAt( data.length - 1 ) === '}' ) {
+					data = JSON.parse( data );
+
+					// Check if the requested method can be found
+					if( data.method && typeof Reveal[data.method] === 'function' ) {
+						Reveal[data.method].apply( Reveal, data.args );
+					}
+				}
+			}, false );
+		}
+
+	}
+
+	/**
+	 * Applies the configuration settings from the config
+	 * object. May be called multiple times.
+	 *
+	 * @param {object} options
+	 */
+	function configure( options ) {
+
+		var oldTransition = config.transition;
+
+		// New config options may be passed when this method
+		// is invoked through the API after initialization
+		if( typeof options === 'object' ) extend( config, options );
+
+		// Abort if reveal.js hasn't finished loading, config
+		// changes will be applied automatically once loading
+		// finishes
+		if( loaded === false ) return;
+
+		var numberOfSlides = dom.wrapper.querySelectorAll( SLIDES_SELECTOR ).length;
+
+		// Remove the previously configured transition class
+		dom.wrapper.classList.remove( oldTransition );
+
+		// Force linear transition based on browser capabilities
+		if( features.transforms3d === false ) config.transition = 'linear';
+
+		dom.wrapper.classList.add( config.transition );
+
+		dom.wrapper.setAttribute( 'data-transition-speed', config.transitionSpeed );
+		dom.wrapper.setAttribute( 'data-background-transition', config.backgroundTransition );
+
+		dom.controls.style.display = config.controls ? 'block' : 'none';
+		dom.progress.style.display = config.progress ? 'block' : 'none';
+
+		dom.controls.setAttribute( 'data-controls-layout', config.controlsLayout );
+		dom.controls.setAttribute( 'data-controls-back-arrows', config.controlsBackArrows );
+
+		if( config.shuffle ) {
+			shuffle();
+		}
+
+		if( config.rtl ) {
+			dom.wrapper.classList.add( 'rtl' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'rtl' );
+		}
+
+		if( config.center ) {
+			dom.wrapper.classList.add( 'center' );
+		}
+		else {
+			dom.wrapper.classList.remove( 'center' );
+		}
+
+		// Exit the paused mode if it was configured off
+		if( config.pause === false ) {
+			resume();
+		}
+
+		if( config.showNotes ) {
+			dom.speakerNotes.setAttribute( 'data-layout', typeof config.showNotes === 'string' ? config.showNotes : 'inline' );
+		}
+
+		if( config.mouseWheel ) {
+			document.addEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
+			document.addEventListener( 'mousewheel', onDocumentMouseScroll, false );
+		}
+		else {
+			document.removeEventListener( 'DOMMouseScroll', onDocumentMouseScroll, false ); // FF
+			document.removeEventListener( 'mousewheel', onDocumentMouseScroll, false );
+		}
+
+		// Rolling 3D links
+		if( config.rollingLinks ) {
+			enableRollingLinks();
+		}
+		else {
+			disableRollingLinks();
+		}
+
+		// Iframe link previews
+		if( config.previewLinks ) {
+			enablePreviewLinks();
+			disablePreviewLinks( '[data-preview-link=false]' );
+		}
+		else {
+			disablePreviewLinks();
+			enablePreviewLinks( '[data-preview-link]:not([data-preview-link=false])' );
+		}
+
+		// Remove existing auto-slide controls
+		if( autoSlidePlayer ) {
+			autoSlidePlayer.destroy();
+			autoSlidePlayer = null;
+		}
+
+		// Generate auto-slide controls if needed
+		if( numberOfSlides > 1 && config.autoSlide && config.autoSlideStoppable && features.canvas && features.requestAnimationFrame ) {
+			autoSlidePlayer = new Playback( dom.wrapper, function() {
+				return Math.min( Math.max( ( Date.now() - autoSlideStartTime ) / autoSlide, 0 ), 1 );
+			} );
+
+			autoSlidePlayer.on( 'click', onAutoSlidePlayerClick );
+			autoSlidePaused = false;
+		}
+
+		// When fragments are turned off they should be visible
+		if( config.fragments === false ) {
+			toArray( dom.slides.querySelectorAll( '.fragment' ) ).forEach( function( element ) {
+				element.classList.add( 'visible' );
+				element.classList.remove( 'current-fragment' );
+			} );
+		}
+
+		// Slide numbers
+		var slideNumberDisplay = 'none';
+		if( config.slideNumber && !isPrintingPDF() ) {
+			if( config.showSlideNumber === 'all' ) {
+				slideNumberDisplay = 'block';
+			}
+			else if( config.showSlideNumber === 'speaker' && isSpeakerNotes() ) {
+				slideNumberDisplay = 'block';
+			}
+		}
+
+		dom.slideNumber.style.display = slideNumberDisplay;
+
+		sync();
+
+	}
+
+	/**
+	 * Binds all event listeners.
+	 */
+	function addEventListeners() {
+
+		eventsAreBound = true;
+
+		window.addEventListener( 'hashchange', onWindowHashChange, false );
+		window.addEventListener( 'resize', onWindowResize, false );
+
+		if( config.touch ) {
+			if( 'onpointerdown' in window ) {
+				// Use W3C pointer events
+				dom.wrapper.addEventListener( 'pointerdown', onPointerDown, false );
+				dom.wrapper.addEventListener( 'pointermove', onPointerMove, false );
+				dom.wrapper.addEventListener( 'pointerup', onPointerUp, false );
+			}
+			else if( window.navigator.msPointerEnabled ) {
+				// IE 10 uses prefixed version of pointer events
+				dom.wrapper.addEventListener( 'MSPointerDown', onPointerDown, false );
+				dom.wrapper.addEventListener( 'MSPointerMove', onPointerMove, false );
+				dom.wrapper.addEventListener( 'MSPointerUp', onPointerUp, false );
+			}
+			else {
+				// Fall back to touch events
+				dom.wrapper.addEventListener( 'touchstart', onTouchStart, false );
+				dom.wrapper.addEventListener( 'touchmove', onTouchMove, false );
+				dom.wrapper.addEventListener( 'touchend', onTouchEnd, false );
+			}
+		}
+
+		if( config.keyboard ) {
+			document.addEventListener( 'keydown', onDocumentKeyDown, false );
+			document.addEventListener( 'keypress', onDocumentKeyPress, false );
+		}
+
+		if( config.progress && dom.progress ) {
+			dom.progress.addEventListener( 'click', onProgressClicked, false );
+		}
+
+		dom.resumeButton.addEventListener( 'click', resume, false );
+
+		if( config.focusBodyOnPageVisibilityChange ) {
+			var visibilityChange;
+
+			if( 'hidden' in document ) {
+				visibilityChange = 'visibilitychange';
+			}
+			else if( 'msHidden' in document ) {
+				visibilityChange = 'msvisibilitychange';
+			}
+			else if( 'webkitHidden' in document ) {
+				visibilityChange = 'webkitvisibilitychange';
+			}
+
+			if( visibilityChange ) {
+				document.addEventListener( visibilityChange, onPageVisibilityChange, false );
+			}
+		}
+
+		// Listen to both touch and click events, in case the device
+		// supports both
+		var pointerEvents = [ 'touchstart', 'click' ];
+
+		// Only support touch for Android, fixes double navigations in
+		// stock browser
+		if( UA.match( /android/gi ) ) {
+			pointerEvents = [ 'touchstart' ];
+		}
+
+		pointerEvents.forEach( function( eventName ) {
+			dom.controlsLeft.forEach( function( el ) { el.addEventListener( eventName, onNavigateLeftClicked, false ); } );
+			dom.controlsRight.forEach( function( el ) { el.addEventListener( eventName, onNavigateRightClicked, false ); } );
+			dom.controlsUp.forEach( function( el ) { el.addEventListener( eventName, onNavigateUpClicked, false ); } );
+			dom.controlsDown.forEach( function( el ) { el.addEventListener( eventName, onNavigateDownClicked, false ); } );
+			dom.controlsPrev.forEach( function( el ) { el.addEventListener( eventName, onNavigatePrevClicked, false ); } );
+			dom.controlsNext.forEach( function( el ) { el.addEventListener( eventName, onNavigateNextClicked, false ); } );
+		} );
+
+	}
+
+	/**
+	 * Unbinds all event listeners.
+	 */
+	function removeEventListeners() {
+
+		eventsAreBound = false;
+
+		document.removeEventListener( 'keydown', onDocumentKeyDown, false );
+		document.removeEventListener( 'keypress', onDocumentKeyPress, false );
+		window.removeEventListener( 'hashchange', onWindowHashChange, false );
+		window.removeEventListener( 'resize', onWindowResize, false );
+
+		dom.wrapper.removeEventListener( 'pointerdown', onPointerDown, false );
+		dom.wrapper.removeEventListener( 'pointermove', onPointerMove, false );
+		dom.wrapper.removeEventListener( 'pointerup', onPointerUp, false );
+
+		dom.wrapper.removeEventListener( 'MSPointerDown', onPointerDown, false );
+		dom.wrapper.removeEventListener( 'MSPointerMove', onPointerMove, false );
+		dom.wrapper.removeEventListener( 'MSPointerUp', onPointerUp, false );
+
+		dom.wrapper.removeEventListener( 'touchstart', onTouchStart, false );
+		dom.wrapper.removeEventListener( 'touchmove', onTouchMove, false );
+		dom.wrapper.removeEventListener( 'touchend', onTouchEnd, false );
+
+		dom.resumeButton.removeEventListener( 'click', resume, false );
+
+		if ( config.progress && dom.progress ) {
+			dom.progress.removeEventListener( 'click', onProgressClicked, false );
+		}
+
+		[ 'touchstart', 'click' ].forEach( function( eventName ) {
+			dom.controlsLeft.forEach( function( el ) { el.removeEventListener( eventName, onNavigateLeftClicked, false ); } );
+			dom.controlsRight.forEach( function( el ) { el.removeEventListener( eventName, onNavigateRightClicked, false ); } );
+			dom.controlsUp.forEach( function( el ) { el.removeEventListener( eventName, onNavigateUpClicked, false ); } );
+			dom.controlsDown.forEach( function( el ) { el.removeEventListener( eventName, onNavigateDownClicked, false ); } );
+			dom.controlsPrev.forEach( function( el ) { el.removeEventListener( eventName, onNavigatePrevClicked, false ); } );
+			dom.controlsNext.forEach( function( el ) { el.removeEventListener( eventName, onNavigateNextClicked, false ); } );
+		} );
+
+	}
+
+	/**
+	 * Add a custom key binding with optional description to
+	 * be added to the help screen.
+	 */
+	function addKeyBinding( binding, callback ) {
+
+		if( typeof binding === 'object' && binding.keyCode ) {
+			registeredKeyBindings[binding.keyCode] = {
+				callback: callback,
+				key: binding.key,
+				description: binding.description
+			};
+		}
+		else {
+			registeredKeyBindings[binding] = {
+				callback: callback,
+				key: null,
+				description: null
+			};
+		}
+
+	}
+
+	/**
+	 * Removes the specified custom key binding.
+	 */
+	function removeKeyBinding( keyCode ) {
+
+		delete registeredKeyBindings[keyCode];
+
+	}
+
+	/**
+	 * Extend object a with the properties of object b.
+	 * If there's a conflict, object b takes precedence.
+	 *
+	 * @param {object} a
+	 * @param {object} b
+	 */
+	function extend( a, b ) {
+
+		for( var i in b ) {
+			a[ i ] = b[ i ];
+		}
+
+		return a;
+
+	}
+
+	/**
+	 * Converts the target object to an array.
+	 *
+	 * @param {object} o
+	 * @return {object[]}
+	 */
+	function toArray( o ) {
+
+		return Array.prototype.slice.call( o );
+
+	}
+
+	/**
+	 * Utility for deserializing a value.
+	 *
+	 * @param {*} value
+	 * @return {*}
+	 */
+	function deserialize( value ) {
+
+		if( typeof value === 'string' ) {
+			if( value === 'null' ) return null;
+			else if( value === 'true' ) return true;
+			else if( value === 'false' ) return false;
+			else if( value.match( /^-?[\d\.]+$/ ) ) return parseFloat( value );
+		}
+
+		return value;
+
+	}
+
+	/**
+	 * Measures the distance in pixels between point a
+	 * and point b.
+	 *
+	 * @param {object} a point with x/y properties
+	 * @param {object} b point with x/y properties
+	 *
+	 * @return {number}
+	 */
+	function distanceBetween( a, b ) {
+
+		var dx = a.x - b.x,
+			dy = a.y - b.y;
+
+		return Math.sqrt( dx*dx + dy*dy );
+
+	}
+
+	/**
+	 * Applies a CSS transform to the target element.
+	 *
+	 * @param {HTMLElement} element
+	 * @param {string} transform
+	 */
+	function transformElement( element, transform ) {
+
+		element.style.WebkitTransform = transform;
+		element.style.MozTransform = transform;
+		element.style.msTransform = transform;
+		element.style.transform = transform;
+
+	}
+
+	/**
+	 * Applies CSS transforms to the slides container. The container
+	 * is transformed from two separate sources: layout and the overview
+	 * mode.
+	 *
+	 * @param {object} transforms
+	 */
+	function transformSlides( transforms ) {
+
+		// Pick up new transforms from arguments
+		if( typeof transforms.layout === 'string' ) slidesTransform.layout = transforms.layout;
+		if( typeof transforms.overview === 'string' ) slidesTransform.overview = transforms.overview;
+
+		// Apply the transforms to the slides container
+		if( slidesTransform.layout ) {
+			transformElement( dom.slides, slidesTransform.layout + ' ' + slidesTransform.overview );
+		}
+		else {
+			transformElement( dom.slides, slidesTransform.overview );
+		}
+
+	}
+
+	/**
+	 * Injects the given CSS styles into the DOM.
+	 *
+	 * @param {string} value
+	 */
+	function injectStyleSheet( value ) {
+
+		var tag = document.createElement( 'style' );
+		tag.type = 'text/css';
+		if( tag.styleSheet ) {
+			tag.styleSheet.cssText = value;
+		}
+		else {
+			tag.appendChild( document.createTextNode( value ) );
+		}
+		document.getElementsByTagName( 'head' )[0].appendChild( tag );
+
+	}
+
+	/**
+	 * Find the closest parent that matches the given
+	 * selector.
+	 *
+	 * @param {HTMLElement} target The child element
+	 * @param {String} selector The CSS selector to match
+	 * the parents against
+	 *
+	 * @return {HTMLElement} The matched parent or null
+	 * if no matching parent was found
+	 */
+	function closestParent( target, selector ) {
+
+		var parent = target.parentNode;
+
+		while( parent ) {
+
+			// There's some overhead doing this each time, we don't
+			// want to rewrite the element prototype but should still
+			// be enough to feature detect once at startup...
+			var matchesMethod = parent.matches || parent.matchesSelector || parent.msMatchesSelector;
+
+			// If we find a match, we're all set
+			if( matchesMethod && matchesMethod.call( parent, selector ) ) {
+				return parent;
+			}
+
+			// Keep searching
+			parent = parent.parentNode;
+
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Converts various color input formats to an {r:0,g:0,b:0} object.
+	 *
+	 * @param {string} color The string representation of a color
+	 * @example
+	 * colorToRgb('#000');
+	 * @example
+	 * colorToRgb('#000000');
+	 * @example
+	 * colorToRgb('rgb(0,0,0)');
+	 * @example
+	 * colorToRgb('rgba(0,0,0)');
+	 *
+	 * @return {{r: number, g: number, b: number, [a]: number}|null}
+	 */
+	function colorToRgb( color ) {
+
+		var hex3 = color.match( /^#([0-9a-f]{3})$/i );
+		if( hex3 && hex3[1] ) {
+			hex3 = hex3[1];
+			return {
+				r: parseInt( hex3.charAt( 0 ), 16 ) * 0x11,
+				g: parseInt( hex3.charAt( 1 ), 16 ) * 0x11,
+				b: parseInt( hex3.charAt( 2 ), 16 ) * 0x11
+			};
+		}
+
+		var hex6 = color.match( /^#([0-9a-f]{6})$/i );
+		if( hex6 && hex6[1] ) {
+			hex6 = hex6[1];
+			return {
+				r: parseInt( hex6.substr( 0, 2 ), 16 ),
+				g: parseInt( hex6.substr( 2, 2 ), 16 ),
+				b: parseInt( hex6.substr( 4, 2 ), 16 )
+			};
+		}
+
+		var rgb = color.match( /^rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/i );
+		if( rgb ) {
+			return {
+				r: parseInt( rgb[1], 10 ),
+				g: parseInt( rgb[2], 10 ),
+				b: parseInt( rgb[3], 10 )
+			};
+		}
+
+		var rgba = color.match( /^rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\,\s*([\d]+|[\d]*.[\d]+)\s*\)$/i );
+		if( rgba ) {
+			return {
+				r: parseInt( rgba[1], 10 ),
+				g: parseInt( rgba[2], 10 ),
+				b: parseInt( rgba[3], 10 ),
+				a: parseFloat( rgba[4] )
+			};
+		}
+
+		return null;
+
+	}
+
+	/**
+	 * Calculates brightness on a scale of 0-255.
+	 *
+	 * @param {string} color See colorToRgb for supported formats.
+	 * @see {@link colorToRgb}
+	 */