Fix null errors in qml

resources/qml/Avatar.qml

@@ -14,7 +14,7 @@ Rectangle {
 
 	Label {
 		anchors.fill: parent
-		text: chat.model.escapeEmoji(String.fromCodePoint(displayName.codePointAt(0)))
+		text: timelineManager.escapeEmoji(String.fromCodePoint(displayName.codePointAt(0)))
 		textFormat: Text.RichText
 		font.pixelSize: avatar.height/2
 		verticalAlignment: Text.AlignVCenter

resources/qml/TimelineView.qml

@@ -167,8 +167,9 @@ Page {
 
 						width: avatarSize
 						height: avatarSize
-						url: chat.model.roomAvatarUrl.replace("mxc://", "image://MxcImage/")
+
-						displayName: chat.model.roomName
+						url: chat.model ? chat.model.roomAvatarUrl.replace("mxc://", "image://MxcImage/") : ""
+						displayName: chat.model ? chat.model.roomName : qsTr("No room selected")
 
 						MouseArea {
 							anchors.fill: parent
@@ -182,7 +183,8 @@ Page {
 						Layout.row: 0
 
 						font.pointSize: fontMetrics.font.pointSize * 1.1
-						text: chat.model.roomName
+
+						text: chat.model ? chat.model.roomName : qsTr("No room selected")
 
 						MouseArea {
 							anchors.fill: parent
@@ -193,9 +195,10 @@ Page {
 						Layout.fillWidth: true
 						Layout.column: 2
 						Layout.row: 1
-						text: chat.model.roomTopic
 						Layout.maximumHeight: fontMetrics.lineSpacing * 2 // show 2 lines
 						clip: true
+
+						text: chat.model ? chat.model.roomTopic : ""
 					}
 
 					ImageButton {
@@ -387,7 +390,7 @@ Page {
 
 						Label { 
 							id: userName
-							text: chat.model.escapeEmoji(modelData.userName)
+							text: timelineManager.escapeEmoji(modelData.userName)
 							color: timelineManager.userColor(modelData.userId, colors.window)
 							textFormat: Text.RichText
 

resources/qml/delegates/MessageDelegate.qml

@@ -36,7 +36,7 @@ Item {
 		DelegateChoice {
 			roleValue: MtxEvent.EmoteMessage
 			NoticeMessage {
-				formatted: chat.model.escapeEmoji(modelData.userName) + " " + model.data.formattedBody
+				formatted: timelineManager.escapeEmoji(modelData.userName) + " " + model.data.formattedBody
 				color: timelineManager.userColor(modelData.userId, colors.window)
 			}
 		}

resources/qml/delegates/Reply.qml

@@ -37,7 +37,7 @@ Item {
 
 		Text { 
 			id: userName
-			text: chat.model ? chat.model.escapeEmoji(reply.modelData.userName) : ""
+			text: timelineManager.escapeEmoji(reply.modelData.userName)
 			color: replyComponent.userColor
 			textFormat: Text.RichText
 

src/timeline/TimelineModel.cpp

@@ -719,12 +719,6 @@ TimelineModel::formatDateSeparator(QDate date) const
         return date.toString(fmt);
 }
 
-QString
-TimelineModel::escapeEmoji(QString str) const
-{
-        return utils::replaceEmoji(str);
-}
-
 void
 TimelineModel::viewRawMessage(QString id) const
 {
@@ -1389,7 +1383,7 @@ TimelineModel::formatTypingUsers(const std::vector<QString> &users, QColor bg)
         QStringList uidWithoutLast;
 
         auto formatUser = [this, bg](const QString &user_id) -> QString {
-                auto uncoloredUsername = escapeEmoji(displayName(user_id));
+                auto uncoloredUsername = utils::replaceEmoji(displayName(user_id));
                 QString prefix =
                   QString("<font color=\"%1\">").arg(manager_->userColor(user_id, bg).name());
 
@@ -1439,7 +1433,7 @@ TimelineModel::formatJoinRuleEvent(QString id)
                 return "";
 
         QString user = QString::fromStdString(event->sender);
-        QString name = escapeEmoji(displayName(user));
+        QString name = utils::replaceEmoji(displayName(user));
 
         switch (event->content.join_rule) {
         case mtx::events::state::JoinRule::Public:
@@ -1464,7 +1458,7 @@ TimelineModel::formatGuestAccessEvent(QString id)
                 return "";
 
         QString user = QString::fromStdString(event->sender);
-        QString name = escapeEmoji(displayName(user));
+        QString name = utils::replaceEmoji(displayName(user));
 
         switch (event->content.guest_access) {
         case mtx::events::state::AccessState::CanJoin:
@@ -1489,7 +1483,7 @@ TimelineModel::formatHistoryVisibilityEvent(QString id)
                 return "";
 
         QString user = QString::fromStdString(event->sender);
-        QString name = escapeEmoji(displayName(user));
+        QString name = utils::replaceEmoji(displayName(user));
 
         switch (event->content.history_visibility) {
         case mtx::events::state::Visibility::WorldReadable:
@@ -1522,7 +1516,7 @@ TimelineModel::formatPowerLevelEvent(QString id)
                 return "";
 
         QString user = QString::fromStdString(event->sender);
-        QString name = escapeEmoji(displayName(user));
+        QString name = utils::replaceEmoji(displayName(user));
 
         // TODO: power levels rendering is actually a bit complex. work on this later.
         return tr("%1 has changed the room's permissions.").arg(name);
@@ -1551,7 +1545,7 @@ TimelineModel::formatMemberEvent(QString id)
         }
 
         QString user = QString::fromStdString(event->state_key);
-        QString name = escapeEmoji(displayName(user));
+        QString name = utils::replaceEmoji(displayName(user));
         QString rendered;
 
         // see table https://matrix.org/docs/spec/client_server/latest#m-room-member

src/timeline/TimelineModel.h

@@ -197,7 +197,6 @@ public:
         Q_INVOKABLE QString formatGuestAccessEvent(QString id);
         Q_INVOKABLE QString formatPowerLevelEvent(QString id);
 
-        Q_INVOKABLE QString escapeEmoji(QString str) const;
         Q_INVOKABLE void viewRawMessage(QString id) const;
         Q_INVOKABLE void viewDecryptedRawMessage(QString id) const;
         Q_INVOKABLE void openUserProfile(QString userid) const;

src/timeline/TimelineViewManager.cpp

@@ -206,6 +206,12 @@ TimelineViewManager::setHistoryView(const QString &room_id)
         }
 }
 
+QString
+TimelineViewManager::escapeEmoji(QString str) const
+{
+        return utils::replaceEmoji(str);
+}
+
 void
 TimelineViewManager::openImageOverlay(QString mxcUrl, QString eventId) const
 {

src/timeline/TimelineViewManager.h

@@ -50,6 +50,7 @@ public:
         bool isNarrowView() const { return isNarrowView_; }
         Q_INVOKABLE void openImageOverlay(QString mxcUrl, QString eventId) const;
         Q_INVOKABLE QColor userColor(QString id, QColor background);
+        Q_INVOKABLE QString escapeEmoji(QString str) const;
 
         Q_INVOKABLE QString userPresence(QString id) const;
         Q_INVOKABLE QString userStatus(QString id) const;