Show whether MAM is supported in MUCs

The conference details in "Advanced Mode" now indicate whether MAM is
supported by the conference server.

src/main/java/eu/siacs/conversations/entities/MucOptions.java

@@ -247,6 +247,11 @@ public class MucOptions {
 		return hasFeature("muc_membersonly");
 	}
 
+	public boolean mamSupport() {
+		// Update with "urn:xmpp:mam:1" once we support it
+		return hasFeature("urn:xmpp:mam:0");
+	}
+
 	public boolean nonanonymous() {
 		return hasFeature("muc_nonanonymous");
 	}

src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java

@@ -19,6 +19,7 @@ import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.TableLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -61,6 +62,8 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 	private LinearLayout membersView;
 	private LinearLayout mMoreDetails;
 	private TextView mConferenceType;
+	private TableLayout mConferenceInfoTable;
+	private TextView mConferenceInfoMam;
 	private ImageButton mChangeConferenceSettingsButton;
 	private Button mInviteButton;
 	private String uuid = null;
@@ -194,7 +197,6 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 		mMoreDetails.setVisibility(View.GONE);
 		mChangeConferenceSettingsButton = (ImageButton) findViewById(R.id.change_conference_button);
 		mChangeConferenceSettingsButton.setOnClickListener(this.mChangeConferenceSettings);
-		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
 		mInviteButton = (Button) findViewById(R.id.invite);
 		mInviteButton.setOnClickListener(inviteListener);
 		mConferenceType = (TextView) findViewById(R.id.muc_conference_type);
@@ -217,6 +219,9 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			}
 		});
 		this.mAdvancedMode = getPreferences().getBoolean("advanced_muc_mode", false);
+		this.mConferenceInfoTable = (TableLayout) findViewById(R.id.muc_info_more);
+		mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
+		this.mConferenceInfoMam = (TextView) findViewById(R.id.muc_info_mam);
 	}
 
 	@Override
@@ -240,6 +245,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 				this.mAdvancedMode = !menuItem.isChecked();
 				menuItem.setChecked(this.mAdvancedMode);
 				getPreferences().edit().putBoolean("advanced_muc_mode", mAdvancedMode).commit();
+				mConferenceInfoTable.setVisibility(this.mAdvancedMode ? View.VISIBLE : View.GONE);
 				invalidateOptionsMenu();
 				updateView();
 				break;
@@ -473,6 +479,11 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			} else {
 				mConferenceType.setText(R.string.public_conference);
 			}
+			if (mucOptions.mamSupport()) {
+				mConferenceInfoMam.setText(R.string.server_info_available);
+			} else {
+				mConferenceInfoMam.setText(R.string.server_info_unavailable);
+			}
 			if (self.getAffiliation().ranks(MucOptions.Affiliation.OWNER)) {
 				mChangeConferenceSettingsButton.setVisibility(View.VISIBLE);
 			} else {

src/main/res/layout/activity_muc_details.xml

@@ -87,7 +87,7 @@
 				android:id="@+id/muc_conference_type"
 				android:layout_width="wrap_content"
 				android:layout_height="wrap_content"
-			    android:text="@string/private_conference"
+				android:text="@string/private_conference"
 				android:layout_centerVertical="true"
 				android:textColor="@color/black87"
 				android:textSize="?attr/TextSizeBody"
@@ -107,6 +107,35 @@
 				android:src="?attr/icon_settings"/>
 				</RelativeLayout>
 
+			<TableLayout
+				android:layout_width="match_parent"
+				android:layout_height="wrap_content"
+				android:id="@+id/muc_info_more"
+				android:stretchColumns="1"
+				android:visibility="gone">
+
+				<TableRow
+					android:layout_width="fill_parent"
+					android:layout_height="match_parent">
+
+					<TextView
+						android:layout_width="wrap_content"
+						android:layout_height="wrap_content"
+						android:text="@string/server_info_mam"
+						android:textColor="@color/black87"
+						android:textSize="?attr/TextSizeBody" />
+
+					<TextView
+						android:id="@+id/muc_info_mam"
+						android:layout_width="wrap_content"
+						android:layout_height="wrap_content"
+						android:layout_gravity="right"
+						android:textColor="@color/black87"
+						android:textSize="?attr/TextSizeBody" />
+				</TableRow>
+
+			</TableLayout>
+
 			<TextView
 				android:id="@+id/details_account"
 				android:layout_width="wrap_content"