Added support for online meeting URLs

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -350,6 +350,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     private static final int MAX_RECIPIENTS_COMPACT = 3;
     private static final int MAX_RECIPIENTS_NORMAL = 7;
 
+    private static final String X_ONLINE_MEETING = "X-MICROSOFT-ONLINEMEETINGEXTERNALLINK";
+
     public class ViewHolder extends RecyclerView.ViewHolder implements
             View.OnClickListener,
             View.OnLongClickListener,
@@ -515,6 +517,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         private Flow flow;
 
         private ImageButton ibCalendar;
+        private ImageButton ibOnline;
         private TextView tvCalendarSummary;
         private TextView tvCalendarDescription;
         private TextView tvCalendarLocation;
@@ -861,6 +864,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             tvNoInternetHeaders = vsBody.findViewById(R.id.tvNoInternetHeaders);
 
             ibCalendar = vsBody.findViewById(R.id.ibCalendar);
+            ibOnline = vsBody.findViewById(R.id.ibOnline);
             tvCalendarSummary = vsBody.findViewById(R.id.tvCalendarSummary);
             tvCalendarDescription = vsBody.findViewById(R.id.tvCalendarDescription);
             tvCalendarLocation = vsBody.findViewById(R.id.tvCalendarLocation);
@@ -1117,6 +1121,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 tvBody.addOnLayoutChangeListener(this);
 
                 ibCalendar.setOnClickListener(this);
+                ibOnline.setOnClickListener(this);
                 btnCalendarAccept.setOnClickListener(this);
                 btnCalendarDecline.setOnClickListener(this);
                 btnCalendarMaybe.setOnClickListener(this);
@@ -1238,6 +1243,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 btnCalendarDecline.setOnClickListener(null);
                 btnCalendarMaybe.setOnClickListener(null);
                 ibCalendar.setOnClickListener(null);
+                ibOnline.setOnClickListener(null);
 
                 btnCalendarAccept.setOnLongClickListener(null);
                 btnCalendarDecline.setOnLongClickListener(null);
@@ -1891,6 +1897,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
         private void clearCalendar() {
             ibCalendar.setVisibility(View.GONE);
+            ibOnline.setVisibility(View.GONE);
             tvCalendarSummary.setVisibility(View.GONE);
             tvCalendarDescription.setVisibility(View.GONE);
             tvCalendarLocation.setVisibility(View.GONE);
@@ -3758,7 +3765,11 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                     Organizer organizer = event.getOrganizer();
 
+                    RawProperty prop = event.getExperimentalProperty(X_ONLINE_MEETING);
+                    String uri = (prop == null ? null : prop.getValue());
+
                     ibCalendar.setVisibility(View.VISIBLE);
+                    ibOnline.setVisibility(TextUtils.isEmpty(uri) ? View.GONE : View.VISIBLE);
 
                     tvCalendarSummary.setText(summary);
                     tvCalendarSummary.setVisibility(TextUtils.isEmpty(summary) ? View.GONE : View.VISIBLE);
@@ -3955,6 +3966,12 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                                 return intent;
                             }
 
+                            if (action == R.id.ibOnline) {
+                                RawProperty prop = event.getExperimentalProperty(X_ONLINE_MEETING);
+                                String uri = (prop == null ? null : prop.getValue());
+                                return (uri == null ? null : Uri.parse(uri));
+                            }
+
                             Created created = event.getCreated();
                             LastModified modified = event.getLastModified();
                             Transparency transparancy = event.getTransparency();
@@ -4104,7 +4121,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         } catch (Throwable ex) {
                             Helper.reportNoViewer(context, (Intent) result, ex);
                         }
-                    }
+                    } else if (result instanceof Uri)
+                        Helper.view(context, (Uri) result, true);
                 }
 
                 @Override
@@ -4462,7 +4480,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 } else if (id == R.id.ibImportance) {
                     int importance = (((message.ui_importance == null ? 1 : message.ui_importance) + 1) % 3);
                     onMenuSetImportance(message, importance);
-                } else if (id == R.id.btnCalendarAccept || id == R.id.btnCalendarDecline || id == R.id.btnCalendarMaybe || id == R.id.ibCalendar) {
+                } else if (id == R.id.btnCalendarAccept || id == R.id.btnCalendarDecline || id == R.id.btnCalendarMaybe ||
+                        id == R.id.ibCalendar || id == R.id.ibOnline) {
                     onActionCalendar(message, view.getId(), false);
                 } else if (id == R.id.ibStoreMedia) {
                     onStoreMedia(message);

app/src/main/res/drawable/twotone_video_camera_front_24.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M18,10.48V6c0,-1.1 -0.9,-2 -2,-2H4C2.9,4 2,4.9 2,6v12c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2v-4.48l4,3.98v-11L18,10.48zM16,18H4V6h12V18zM10,12c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2s-2,0.9 -2,2S8.9,12 10,12zM14,15.43c0,-0.81 -0.48,-1.53 -1.22,-1.85C11.93,13.21 10.99,13 10,13c-0.99,0 -1.93,0.21 -2.78,0.58C6.48,13.9 6,14.62 6,15.43V16h8V15.43z"/>
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M4,18h12V9.69V6H4V18zM10,8c1.1,0 2,0.9 2,2s-0.9,2 -2,2s-2,-0.9 -2,-2S8.9,8 10,8zM6,15.43c0,-0.81 0.48,-1.53 1.22,-1.85C8.07,13.21 9.01,13 10,13c0.99,0 1.93,0.21 2.78,0.58C13.52,13.9 14,14.62 14,15.43V16H6V15.43z"
+      android:strokeAlpha="0.3"
+      android:fillAlpha="0.3"/>
+</vector>

app/src/main/res/layout/include_message_calendar.xml

@@ -24,11 +24,24 @@
         android:contentDescription="@string/title_icalendar_calendar"
         android:padding="6dp"
         android:scaleType="fitCenter"
-        android:tooltipText="@string/title_icalendar_accept"
+        android:tooltipText="@string/title_icalendar_calendar"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toBottomOf="@id/vSeparatorCalendar"
         app:srcCompat="@drawable/twotone_event_24" />
 
+    <ImageButton
+        android:id="@+id/ibOnline"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:background="?android:attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/title_icalendar_calendar"
+        android:padding="6dp"
+        android:scaleType="fitCenter"
+        android:tooltipText="@string/title_icalendar_accept"
+        app:layout_constraintBottom_toBottomOf="@+id/tvAttendees"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:srcCompat="@drawable/twotone_video_camera_front_24" />
+
     <TextView
         android:id="@+id/tvCalendarSummary"
         android:layout_width="0dp"