show the current input method name in the tray icon

src/modules/notificationitem/notificationitem.cpp

@@ -72,6 +72,14 @@ class StatusNotifierItem : public dbus::ObjectVTable<StatusNotifierItem> {
 
     std::string label() { return ""; }
 
+    std::string title() {
+        const InputMethodEntry *imEntry = nullptr;
+        if (auto *ic = parent_->menu()->lastRelevantIc()) {
+            imEntry = parent_->instance()->inputMethodEntry(ic);
+        }
+        return imEntry == nullptr ? _("Input Method") : imEntry->name();
+    }
+
     static dbus::DBusStruct<
         std::string,
         std::vector<dbus::DBusStruct<int32_t, int32_t, std::vector<uint8_t>>>,
@@ -104,6 +112,15 @@ class StatusNotifierItem : public dbus::ObjectVTable<StatusNotifierItem> {
         lastLabel_ = std::move(label);
     }
 
+    void notifyNewTitle() {
+        std::string currentTitle = title();
+        if (currentTitle.empty() || lastTitle_ == currentTitle) {
+            return;
+        }
+        newTitle();
+        lastTitle_ = std::move(currentTitle);
+    }
+
     void reset() {
         releaseSlot();
         lastIconName_.clear();
@@ -138,8 +155,7 @@ class StatusNotifierItem : public dbus::ObjectVTable<StatusNotifierItem> {
     FCITX_OBJECT_VTABLE_PROPERTY(category, "Category", "s",
                                  []() { return "SystemServices"; });
     FCITX_OBJECT_VTABLE_PROPERTY(id, "Id", "s", []() { return "Fcitx"; });
-    FCITX_OBJECT_VTABLE_PROPERTY(title, "Title", "s",
-                                 []() { return _("Input Method"); });
+    FCITX_OBJECT_VTABLE_PROPERTY(title, "Title", "s", [this]() { return title(); });
     FCITX_OBJECT_VTABLE_PROPERTY(status, "Status", "s",
                                  []() { return "Active"; });
     FCITX_OBJECT_VTABLE_PROPERTY(windowId, "WindowId", "i", []() { return 0; });
@@ -238,6 +254,7 @@ class StatusNotifierItem : public dbus::ObjectVTable<StatusNotifierItem> {
     std::string cachedLabel_;
     std::vector<dbus::DBusStruct<int, int, std::vector<uint8_t>>>
         cachedLabelIcon_;
+    std::string lastTitle_;
 };
 
 NotificationItem::NotificationItem(Instance *instance)
@@ -406,6 +423,13 @@ void NotificationItem::newIcon() {
     // sni_->xayatanaNewLabel(sni_->label(), sni_->label());
 }
 
+void NotificationItem::newTitle() {
+    if (!sni_->isRegistered()) {
+        return;
+    }
+    sni_->notifyNewTitle();
+}
+
 class NotificationItemFactory : public AddonFactory {
     AddonInstance *create(AddonManager *manager) override {
         return new NotificationItem(manager->instance());

src/modules/notificationitem/notificationitem.h

@@ -36,7 +36,6 @@ class NotificationItem : public AddonInstance {
     bool registered() const { return registered_; }
     std::unique_ptr<HandlerTableEntry<NotificationItemCallback>>
     watch(NotificationItemCallback callback);
-    void newIcon();
     FCITX_ADDON_DEPENDENCY_LOADER(classicui, instance_->addonManager());
     DBusMenu *menu() { return menu_.get(); }
 
@@ -49,6 +48,8 @@ class NotificationItem : public AddonInstance {
 
     void maybeScheduleRegister();
     void cleanUp();
+    void newIcon();
+    void newTitle();
 
     Instance *instance_;
     std::unique_ptr<dbus::ServiceWatcher> watcher_;