Merge pull request #923 from DebVortex/feature/pdf.js

Included PDF.js and possiblity to show pdfs

README.rst

@@ -250,6 +250,8 @@ OpenSlides uses the following projects or parts of them:
 
 * `Django haystack <http://haystacksearch.org>`_, License: BSD
 
+* `pdf.js <http://mozilla.github.io/pdf.js/>`_, License: Apache License v2.0
+
 * `Pillow <https://github.com/python-imaging/Pillow/>`_, License: Standard
   PIL License
 

openslides/mediafile/__init__.py

@@ -0,0 +1,4 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from . import slides  # noqa

openslides/mediafile/models.py

@@ -12,16 +12,20 @@
 
 import mimetypes
 
+from django.core.urlresolvers import reverse
 from django.db import models
 from django.utils.translation import ugettext_lazy, ugettext_noop
 
+from openslides.projector.models import SlideMixin
 from openslides.utils.person.models import PersonField
 
 
-class Mediafile(models.Model):
+class Mediafile(SlideMixin, models.Model):
     """
     Class for uploaded files which can be delivered under a certain url.
     """
+    slide_callback_name = 'mediafile'
+    PRESENTABLE_FILE_TYPES = ['application/pdf']
 
     mediafile = models.FileField(upload_to='file', verbose_name=ugettext_lazy("File"))
     """
@@ -41,6 +45,12 @@ class Mediafile(models.Model):
     filetype = models.CharField(max_length=255, editable=False)
     """A string used to show the type of the file."""
 
+    is_presentable = models.BooleanField(
+        default=False,
+        verbose_name=ugettext_lazy("Is Presentable"),
+        help_text=ugettext_lazy("If checked, this file can be presented on the projector. "
+                                "Currently, this is only possible for PDFs."))
+
     class Meta:
         """
         Meta class for the mediafile model.
@@ -67,15 +77,16 @@ class Mediafile(models.Model):
             self.filetype = ugettext_noop('unknown')
         return super(Mediafile, self).save(*args, **kwargs)
 
-    @models.permalink
     def get_absolute_url(self, link='update'):
         """
-        Returns the URL to a mediafile. The link can be 'update' or 'delete'.
+        Returns the URL to a mediafile. The link can be 'projector',
+        'update' or 'delete'.
         """
         if link == 'update' or link == 'edit':  # 'edit' ist only used until utils/views.py is fixed
-            return ('mediafile_update', [str(self.id)])
+            return reverse('mediafile_update', kwargs={'pk': str(self.id)})
         if link == 'delete':
-            return ('mediafile_delete', [str(self.id)])
+            return reverse('mediafile_delete', kwargs={'pk': str(self.id)})
+        return super(Mediafile, self).get_absolute_url(link)
 
     def get_filesize(self):
         """

openslides/mediafile/slides.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from django.template.loader import render_to_string
+
+from openslides.config.api import config
+from openslides.projector.api import register_slide
+
+from .models import Mediafile
+
+
+def mediafile_presentation_as_slide(**kwargs):
+    """
+    Return the html code for a presentation of a Mediafile.
+
+    At the moment, only the presentation of pdfs is supported.
+    """
+    file_pk = kwargs.get('pk', None)
+    page_num = kwargs.get('page_num', 1)
+
+    try:
+        pdf = Mediafile.objects.get(
+            pk=file_pk,
+            filetype__in=Mediafile.PRESENTABLE_FILE_TYPES,
+            is_presentable=True)
+    except Mediafile.DoesNotExist:
+        # TODO what doing, if a wrong pk is given?
+        pdf = None
+    context = {'pdf': pdf, 'page_num': page_num,
+               'fullscreen': config['pdf_fullscreen']}
+    return render_to_string('mediafile/presentation_slide.html', context)
+
+
+register_slide('mediafile', mediafile_presentation_as_slide)

openslides/mediafile/static/javascript/pdf_presenter.js

@@ -0,0 +1,95 @@
+var pdf = PDFJS.getDocument(projector['pdf_url']);
+
+projector['load_pdf_page'] = function(page) {
+    projector['pdf_page_num'] = page;
+    pdf.then(function(pdf) {
+        pdf.getPage(page).then(set_convas_size);
+    });
+};
+
+projector['load_pdf'] = function(data) {
+    projector['pdf_url'] = data['url'];
+    projector['pdf_page_num'] = data['page_num'];
+    pdf = PDFJS.getDocument(projector['pdf_url']);
+    projector['load_pdf_page'](projector['pdf_page_num']);
+};
+
+projector['toggle_fullscreen'] = function(fullscreen) {
+    projector['pdf_fullscreen'] = fullscreen;
+    content = $('#content');
+    presentation = $('#presentation');
+    footer = $('#footer');
+    body = $('body');
+    if (fullscreen) {
+        content.addClass('fullscreen');
+        presentation.addClass('fullscreen');
+        footer.addClass('black');
+        body.addClass('black');
+    } else {
+        content.removeClass('fullscreen');
+        presentation.removeClass('fullscreen');
+        footer.removeClass('black');
+        body.removeClass('black');
+    }
+    $(window).resize();
+};
+
+function scale_to_height(page) {
+    return page.getViewport(window.innerHeight / page.getViewport(1.0).height);
+}
+
+function scale_to_width(page) {
+    return page.getViewport(window.innerWidth / page.getViewport(1.0).width);
+}
+
+function get_correct_viewport(page, canvas) {
+    if(window.innerWidth > window.innerHeight) {
+        viewport = scale_to_height(page);
+        if (viewport.width > window.innerWidth) {
+            viewport = scale_to_width(page);
+            canvas.height = viewport.height;
+            canvas.width = window.innerWidth;
+        } else {
+            canvas.height = window.innerHeight;
+            canvas.width = viewport.width;
+        }
+    } else {
+        viewport = scale_to_width(page);
+        if (viewport.height > window.innerHeight) {
+            viewport = scale_to_height(page);
+            canvas.height = window.innerHeight;
+            canvas.width = viewport.width;
+        } else {
+            canvas.height = viewport.height;
+            canvas.width = window.innerWidth;
+        }
+    }
+    return viewport;
+}
+
+function set_convas_size(page) {
+    var canvas = document.getElementById('presentation');
+    var context = canvas.getContext('2d');
+    if (projector['pdf_fullscreen']) {
+        viewport = get_correct_viewport(page, canvas);
+    } else {
+        viewport = page.getViewport(window.innerWidth / page.getViewport(1.0).width);
+        canvas.height = viewport.height;
+        canvas.width = window.innerWidth;
+    }
+    page.render({canvasContext: context, viewport: viewport});
+}
+
+$(document).ready(function () {
+    $(window).resize(function() {
+        projector['load_pdf_page'](projector['pdf_page_num']);
+    });
+    if (projector['pdf_fullscreen']) {
+        if (!$('#content').hasClass('fullscreen')) {
+            $('#content').addClass('fullscreen');
+            $('#footer').addClass('black');
+            $('body').addClass('black');
+        }
+    }
+    $(window).resize();
+});

openslides/mediafile/templates/mediafile/mediafile_list.html

@@ -36,6 +36,12 @@
                 <span style="width: 1px; white-space: nowrap;">
                     <a href="{{ mediafile|absolute_url:'update' }}" rel="tooltip" data-original-title="{% trans 'Edit' %}" class="btn btn-mini"><i class="icon-pencil"></i></a>
                     <a href="{{ mediafile|absolute_url:'delete' }}" rel="tooltip" data-original-title="{% trans 'Delete' %}" class="btn btn-mini"><i class="icon-remove"></i></a>
+                    {% if mediafile.is_presentable %}{% if mediafile.filetype in mediafile.PRESENTABLE_FILE_TYPES %}
+                    <a href="{{ mediafile|absolute_url:'projector' }}" class="activate_link choose-pdf btn {% if mediafile.is_active_slide %}btn-primary{% endif %} btn-mini" title="{% trans 'Show' %}">
+                        <i class="icon-facetime-video {% if mediafile.is_active_slide %}icon-white{% endif %}">
+                        </i>
+                    </a>
+                    {% endif %}{% endif %}
                 </span>
             </td>
             {% endif %}

openslides/mediafile/templates/mediafile/pdfs_widget.html

@@ -0,0 +1,45 @@
+{% load i18n %}
+{% load tags %}
+
+<form action="{% url 'target_pdf_page' %}" method="GET" class="set-page-form">
+    <div class="input-prepend" style="margin-bottom:0;">
+        <a class="btn go-first-page">
+            <i class="icon-fast-backward"></i>
+        </a>
+        <a class="btn pdf-page-ctl"  href="{% url 'prev_pdf_page' %}">
+            <i class="icon-backward"></i>
+        </a>
+        <a class="btn pdf-page-ctl" href="{% url 'next_pdf_page' %}">
+            <i class="icon-forward"></i>
+        </a>
+    </div>
+
+    <div class="input-append" style="margin-bottom:0;">
+        <a class="btn pdf-toggle-fullscreen {%if pdf_fullscreen %}btn-primary{% endif %}" href="{% url 'toggle_fullscreen' %}">
+            <i class="icon-fullscreen {%if pdf_fullscreen %}icon-white{% endif %}"></i>
+        </a>
+    </div>
+
+    <div class="input-append input-prepend" style="margin-bottom:0;">
+        <span class="add-on">Page:</span>
+        <input id="page_num" name="page_num" type="number" style="width: 22px;" value="{{ current_page }}">
+
+        <button type="submit" id="go_to_page" class="btn" style="width: 40px;">
+            <i class="icon-refresh"></i>
+        </button>
+    </div>
+
+</form>
+
+
+<ul style="line-height: 180%">
+{% for pdf in pdfs %}
+    <li class="{% if pdf.is_active_slide %}activeline{% endif %}">
+        <a href="{{ pdf|absolute_url:'projector' }}" class="activate_link choose-pdf btn {% if pdf.is_active_slide %}btn-primary{% endif %} btn-mini" title="{% trans 'Show' %}">
+            <i class="icon-facetime-video {% if pdf.is_active_slide %}icon-white{% endif %}"></i>
+        </a> {{ pdf }}
+    </li>
+{% empty %}
+    <li>{% trans 'No PDFs available.' %}</li>
+{% endfor %}
+</ul>

openslides/mediafile/templates/mediafile/presentation_slide.html

@@ -0,0 +1,15 @@
+{% load i18n %}
+{% load static %}
+
+<script src="{% static 'javascript/pdf.js' %}" type="text/javascript"></script>
+<script type="text/javascript">
+    projector['pdf_url'] = '{{ pdf.mediafile.url }}';
+    projector['pdf_page_num'] = {{ page_num }};
+    projector['pdf_fullscreen'] = {% if fullscreen %}true{% else %}false{% endif %};
+    PDFJS.workerSrc = "{% static 'javascript/pdf.worker.js' %}";
+</script>
+<script src="{% static 'javascript/pdf_presenter.js' %}" type="text/javascript"></script>
+
+<div class="canvas-container">
+  <canvas id="presentation" class="{% if fullscreen %}fullscreen{% endif %}"></canvas>
+</div>

openslides/mediafile/urls.py

@@ -31,4 +31,12 @@ urlpatterns = patterns(
     url(r'^(?P<pk>\d+)/del/$',
         views.MediafileDeleteView.as_view(),
         name='mediafile_delete'),
+    url(r'^pdf/next/$', views.PdfNextView.as_view(), name='next_pdf_page'),
+    url(r'^pdf/prev/$', views.PdfPreviousView.as_view(), name='prev_pdf_page'),
+    url(r'^pdf/target_page/$',
+        views.PdfGoToPageView.as_view(),
+        name='target_pdf_page'),
+    url(r'^pdf/toggle_fullscreen/$',
+        views.PdfToggleFullscreenView.as_view(),
+        name='toggle_fullscreen')
 )

openslides/mediafile/views.py

@@ -11,10 +11,16 @@
 """
 
 from django.core.urlresolvers import reverse
+from django.http import HttpResponse
 from django.utils.translation import ugettext as _
 
+from openslides.config.api import config
+from openslides.projector.api import get_active_slide
+from openslides.projector.projector import Widget
 from openslides.utils.template import Tab
-from openslides.utils.views import CreateView, DeleteView, ListView, UpdateView
+from openslides.utils.tornado_webserver import ProjectorSocketHandler
+from openslides.utils.views import (AjaxView, CreateView, DeleteView, RedirectView, ListView,
+                                    UpdateView)
 
 from .forms import MediafileNormalUserCreateForm, MediafileUpdateForm
 from .models import Mediafile
@@ -94,6 +100,132 @@ class MediafileDeleteView(DeleteView):
         return super(MediafileDeleteView, self).on_clicked_yes(*args, **kwargs)
 
 
+class PdfNavBaseView(AjaxView):
+    """
+    BaseView for the Pdf Ajax Navigation.
+    """
+
+    def get_ajax_context(self, *args, **kwargs):
+        return {'current_page': self.active_slide['page_num']}
+
+    def load_other_page(self, active_slide):
+        """
+        Tell connected clients to load an other pdf page.
+        """
+        config['projector_active_slide'] = active_slide
+        ProjectorSocketHandler.send_updates(
+            {'calls': {'load_pdf_page': active_slide['page_num']}})
+
+
+class PdfNextView(PdfNavBaseView):
+    """
+    Activate the next Page of a pdf and return the number of the current page.
+    """
+
+    def get(self, request, *args, **kwargs):
+        """
+        Increment the page number by 1.
+
+        If the page number is set in the active slide, we are the value is
+        incremented by 1. Otherwise, it is the first page and it is set to 2.
+        """
+        self.active_slide = get_active_slide()
+        if self.active_slide['callback'] == 'mediafile':
+            if 'page_num' not in self.active_slide:
+                self.active_slide['page_num'] = 2
+            else:
+                self.active_slide['page_num'] += 1
+            self.load_other_page(self.active_slide)
+            response = super(PdfNextView, self).get(self, request, *args, **kwargs)
+        else:
+            # no Mediafile is active and the JavaScript should not do anything.
+            response = HttpResponse()
+        return response
+
+
+class PdfPreviousView(PdfNavBaseView):
+    """
+    Activate the previous Page of a pdf and return the number of the current page.
+    """
+
+    def get(self, request, *args, **kwargs):
+        """
+        Decrement the page number by 1.
+
+        If the page number is set and it is greater than 1, it is decremented
+        by 1. Otherwise, it is the first page and nothing happens.
+        """
+        self.active_slide = get_active_slide()
+        response = None
+        if self.active_slide['callback'] == 'mediafile':
+            if 'page_num' in self.active_slide and self.active_slide['page_num'] > 1:
+                self.active_slide['page_num'] -= 1
+                self.load_other_page(self.active_slide)
+                response = super(PdfPreviousView, self).get(self, request, *args, **kwargs)
+        if not response:
+            response = HttpResponse()
+        return response
+
+
+class PdfGoToPageView(PdfNavBaseView):
+    """
+    Activate the page set in the textfield.
+    """
+
+    def get(self, request, *args, **kwargs):
+        target_page = int(request.GET.get('page_num'))
+        self.active_slide = get_active_slide()
+        if target_page:
+            self.active_slide['page_num'] = target_page
+            self.load_other_page(self.active_slide)
+            response = super(PdfGoToPageView, self).get(self, request, *args, **kwargs)
+        else:
+            response = HttpResponse()
+        return response
+
+
+class PdfToggleFullscreenView(RedirectView):
+    """
+    Toggle fullscreen mode for pdf presentations.
+    """
+    allow_ajax = True
+    url_name = 'dashboard'
+
+    def get_ajax_context(self, *args, **kwargs):
+        config['pdf_fullscreen'] = not config['pdf_fullscreen']
+        active_slide = get_active_slide()
+        if active_slide['callback'] == 'mediafile':
+            ProjectorSocketHandler.send_updates(
+                {'calls': {'toggle_fullscreen': config['pdf_fullscreen']}})
+        return {'fullscreen': config['pdf_fullscreen']}
+
+
+def get_widgets(request):
+    """
+    Return the widgets of the projector app
+    """
+    widgets = []
+
+    # PDF-Presentation widget
+    pdfs = Mediafile.objects.filter(
+        filetype__in=Mediafile.PRESENTABLE_FILE_TYPES,
+        is_presentable=True
+    )
+    current_page = get_active_slide().get('page_num', 1)
+    widgets.append(Widget(
+        request,
+        name='presentations',
+        display_name=_('Presentations'),
+        template='mediafile/pdfs_widget.html',
+        context={'pdfs': pdfs, 'current_page': current_page,
+                 'pdf_fullscreen': config['pdf_fullscreen']},
+        permission_required='projector.can_manage_projector',
+        default_column=1,
+        default_weight=75))
+
+    return widgets
+
+
 def register_tab(request):
     """
     Inserts a new Tab to the views for files.

openslides/projector/signals.py

@@ -73,12 +73,17 @@ def config_variables(sender, **kwargs):
         name='projector_active_overlays',
         default_value=[])
 
+    projector_pdf_fullscreen = ConfigVariable(
+        name='pdf_fullscreen',
+        default_value=False)
+
     return ConfigPage(
         title='No title here', url='bar', required_permission=None, variables=(
             projector, projector_message,
             countdown_time, countdown_start_stamp, countdown_pause_stamp,
             countdown_state, projector_scale, projector_scroll,
-            projector_active_overlays, projector_js_cache))
+            projector_active_overlays, projector_js_cache,
+            projector_pdf_fullscreen))
 
 
 @receiver(projector_overlays, dispatch_uid="projector_countdown")

openslides/projector/static/javascript/dashboard.js

@@ -22,7 +22,7 @@ function restoreOrder() {
         var colid = value.id;
         var cookieName = "cookie-" + colid;
         var cookie = $.cookie(cookieName);
-        if ( cookie == null ) { return; }
+        if ( cookie === null ) { return; }
         var IDs = cookie.split(",");
         for (var i = 0, n = IDs.length; i < n; i++ ) {
             var widgetID = IDs[i];
@@ -81,7 +81,7 @@ $(function() {
                     $('#countdown_play').show();
                     $('#countdown_stop').hide();
                 }
-                $('#countdown_time').val(data['countdown_time'])
+                $('#countdown_time').val(data['countdown_time']);
             }
         });
     });
@@ -123,6 +123,55 @@ $(function() {
         }
     });
 
+    // control pdf pages
+    $('.pdf-page-ctl').click(function(event){
+        event.preventDefault();
+        var link = $(this);
+        $.ajax({
+            type: 'GET',
+            url: link.attr('href'),
+            dataType: 'json',
+            success: function(data) {
+                if (typeof data.current_page !== 'undefined') {
+                    $('#page_num').val(data.current_page);
+                }
+            }
+        });
+    });
+
+    $('.set-page-form').submit(function() {
+        $(this).ajaxSubmit();
+        return false;
+    });
+
+    $('.go-first-page').click(function() {
+        $('#page_num').val('1');
+        $('.set-page-form').ajaxSubmit();
+    });
+
+    $('.pdf-toggle-fullscreen').click(function(event){
+        event.preventDefault();
+        var link = $(this);
+        $.ajax({
+            type: 'GET',
+            url: link.attr('href'),
+            dataType: 'json',
+            success: function(data) {
+                if(data.fullscreen) {
+                    if (!link.hasClass('btn-primary')) {
+                        link.addClass('btn-primary');
+                        link.find('i').addClass('icon-white');
+                    }
+                } else {
+                    if (link.hasClass('btn-primary')) {
+                        link.removeClass('btn-primary');
+                        link.find('i').removeClass('icon-white');
+                    }
+                }
+            }
+        });
+    });
+
 /* comment out this function because '$.browser' has been removed from jquery 1.9, see:
    http://blog.jquery.com/2013/01/15/jquery-1-9-final-jquery-2-0-beta-migrate-final-released/
    TODO: use jquery migrate to have $.browser support for IE8;

openslides/projector/static/javascript/projector.js

@@ -66,6 +66,9 @@ var updater = {
 
     updateProjector: function(data) {
         if (data.content) {
+            $('#content').removeClass('fullscreen');
+            $('#footer').removeClass('black');
+            $('body').removeClass('black');
             $('#content').html(data.content);
         }
         if (data.overlays) {

openslides/projector/static/styles/projector.css

@@ -86,12 +86,11 @@ body{
     top: 150px;
     right: 40px;
     z-index: -1;
-    transition: all 1s;
     line-height: normal;
+    transition-property: margin, font-size;
+    transition-duration: 1s;
 }
-#content .scroll {
+
-    transition: margin 1s;
-}
 h1 {
     font-size: 2.25em;
     margin-bottom: 40px;
@@ -193,3 +192,37 @@ tr.total td {
 td.elected {
     background-color: #BED4DE !important;
 }
+
+/* PDF Presentation */
+
+.canvas-container {
+   width: 100%;
+   text-align:center;
+}
+
+#presentation {
+    position: relative;
+    left:-75px;
+    top: -77px;
+}
+
+#presentation.fullscreen {
+    left: 0;
+    top: 0;
+}
+
+.fullscreen {
+    z-index: 1000!important;
+    left: 0!important;
+    top: 0!important;
+    right: 0!important;
+    background-color: #000000;
+}
+
+#footer.black {
+    display: none;
+}
+
+body.black {
+    background-color: #000000;
+}

openslides/projector/templates/projector.html

@@ -9,6 +9,19 @@
         <link href="{% static 'styles/projector.css' %}" type="text/css" rel="stylesheet">
         <link  href="{% static 'img/favicon.png' %}" type="image/png" rel="shortcut icon">
         <title>{% trans 'Projector' %} – {{ 'event_name'|get_config }}</title>
+
+        <script type="text/javascript" src="{% static 'javascript/jquery.min.js' %}"></script>
+        <script type="text/javascript" src="{% static 'javascript/sockjs-0.3.min.js' %}"></script>
+        <script type="text/javascript" src="{% static 'javascript/projector.js' %}"></script>
+        <script type="text/javascript">
+            {% for js in overlay_js %}
+                projector.update_data({{ js|safe }});
+            {% endfor %}
+            {% for key, value in calls.items %}
+                projector.{{ key }}({{ value }});
+            {% endfor %}
+        </script>
+
     </head>
     <body>
         <div id="header">
@@ -34,16 +47,5 @@
                 {% endif %}
             </div>
         </div>
-        <script type="text/javascript" src="{% static 'javascript/jquery.min.js' %}"></script>
-        <script type="text/javascript" src="{% static 'javascript/sockjs-0.3.min.js' %}"></script>
-        <script type="text/javascript" src="{% static 'javascript/projector.js' %}"></script>
-        <script type="text/javascript">
-            {% for js in overlay_js %}
-                projector.update_data({{ js|safe }});
-            {% endfor %}
-            {% for key, value in calls.items %}
-                projector.{{ key }}({{ value }});
-            {% endfor %}
-        </script>
     </body>
 </html>

openslides/projector/views.py

@@ -18,9 +18,11 @@ from django.shortcuts import redirect
 from django.utils.translation import ugettext as _
 
 from openslides.config.api import config
+from openslides.utils.tornado_webserver import ProjectorSocketHandler
 from openslides.utils.template import Tab
 from openslides.utils.views import (AjaxMixin, CreateView, DeleteView,
                                     RedirectView, TemplateView, UpdateView)
+from openslides.mediafile.models import Mediafile
 
 from .api import (call_on_projector, get_active_slide, get_all_widgets,
                   get_overlays, get_projector_content, get_projector_overlays,
@@ -84,7 +86,17 @@ class ActivateView(RedirectView):
     allow_ajax = True
 
     def pre_redirect(self, request, *args, **kwargs):
-        set_active_slide(kwargs['callback'], kwargs=dict(request.GET.items()))
+        if kwargs['callback'] == 'mediafile' and \
+                get_active_slide()['callback'] == 'mediafile':
+            # If the current slide is a pdf and the new page is also a slide, we dont have to use
+            # set_active_slide, because is causes a content reload.
+            kwargs.update({'page_num': 1, 'pk': request.GET.get('pk')})
+            url = Mediafile.objects.get(pk=kwargs['pk'], is_presentable=True).mediafile.url
+            config['projector_active_slide'] = kwargs
+            ProjectorSocketHandler.send_updates(
+                {'calls': {'load_pdf': {'url': url, 'page_num': kwargs['page_num']}}})
+        else:
+            set_active_slide(kwargs['callback'], kwargs=dict(request.GET.items()))
         config['projector_scroll'] = config.get_default('projector_scroll')
         config['projector_scale'] = config.get_default('projector_scale')
 

openslides/static/javascript/utils.js

@@ -46,6 +46,10 @@ $(function () {
                 }
                 link.addClass('btn-primary');
                 link.children('i').addClass('icon-white');
+                // set page_num to 1 if a pdf is activated
+                if ( link.hasClass('choose-pdf') ) {
+                    $('#page_num').val(1);
+                }
             }
         });
     });

openslides/static/styles/base.css

@@ -322,7 +322,9 @@ legend + .control-group {
 .icon-append_to_list_of_speakers {
     background-position: -48px -144px;
 }
-
+.icon-presentations {
+    background-position: -264px -48px;
+}
 /** More glyphicons free icons **/
 .status_link .icon-on, .icon-checked-new {
     background-image: url("../img/glyphicons_152_check.png");