Add basic cross-signing support

(cherry picked from commit e1795076c8c41a34b91c31df35d1e344d0b14887)

src/controller.cpp

@@ -417,3 +417,12 @@ bool Controller::ssssSupported() const
     return false;
 #endif
 }
+
+bool Controller::csSupported() const
+{
+#if Quotient_VERSION_MINOR > 9
+    return true;
+#else
+    return false;
+#endif
+}

src/controller.h

@@ -51,6 +51,7 @@ class Controller : public QObject
     Q_PROPERTY(QStringList accountsLoading MEMBER m_accountsLoading NOTIFY accountsLoadingChanged)
 
     Q_PROPERTY(bool ssssSupported READ ssssSupported CONSTANT)
+    Q_PROPERTY(bool csSupported READ csSupported CONSTANT)
 
 public:
     static Controller &instance();
@@ -97,6 +98,7 @@ public:
     Q_INVOKABLE void removeConnection(const QString &userId);
 
     bool ssssSupported() const;
+    bool csSupported() const;
 
 private:
     explicit Controller(QObject *parent = nullptr);

src/qml/AccountMenu.qml

@@ -72,6 +72,12 @@ QQC2.Menu {
         })
         enabled: Controller.ssssSupported
     }
+    QQC2.MenuItem {
+        text: i18nc("@action:inmenu", "Verify this Device")
+        icon.name: "security-low"
+        onTriggered: root.connection.startSelfVerification()
+        enabled: Controller.csSupported
+    }
     QQC2.MenuItem {
         text: i18n("Logout")
         icon.name: "list-remove-user"

src/qml/DirectChatDrawerHeader.qml

@@ -59,12 +59,27 @@ ColumnLayout {
         }
     }
 
-    Kirigami.Heading {
+    RowLayout {
         Layout.fillWidth: true
-        type: Kirigami.Heading.Type.Primary
-        wrapMode: QQC2.Label.Wrap
-        text: root.room.displayName
-        textFormat: Text.PlainText
-        horizontalAlignment: Text.AlignHCenter
+        Layout.alignment: Qt.AlignHCenter
+        Kirigami.Icon {
+            id: securityIcon
+            //TODO figure out how to make this update
+            source: room.connection.isUserVerified(root.room.directChatRemoteMember.id) ?
+                        (room.connection.allSessionsSelfVerified(root.room.directChatRemoteMember.id) ? "security-high" : "security-medium")
+                        : "security-low"
+
+        }
+        Kirigami.Heading {
+            type: Kirigami.Heading.Type.Primary
+            wrapMode: QQC2.Label.Wrap
+            text: root.room.displayName
+            textFormat: Text.PlainText
+            horizontalAlignment: Text.AlignHCenter
+        }
+        Item {
+            Layout.preferredWidth: visible ? securityIcon.width : 0
+            visible: securityIcon.visible
+        }
     }
 }

src/qml/RoomInformation.qml

@@ -89,6 +89,16 @@ QQC2.ScrollView {
                 }
             }
 
+            Delegates.RoundedItemDelegate {
+                visible: root.room.isDirectChat() && Controller.csSupported
+                icon.name: "security-low-symbolic"
+                text: i18nc("@action:button", "Verify user")
+
+                onClicked: root.room.startVerification()
+
+                Layout.fillWidth: true
+            }
+
             Delegates.RoundedItemDelegate {
                 id: favouriteButton
                 visible: !root.room.isSpace