add opt-in hide to system tray icon (#99)

src/abaddon.cpp

@@ -248,11 +248,25 @@ int Abaddon::StartGTK() {
     m_main_window->GetChatWindow()->signal_action_reaction_remove().connect(sigc::mem_fun(*this, &Abaddon::ActionReactionRemove));
 
     ActionReloadCSS();
+    if (m_settings.GetSettings().HideToTray) {
+        m_tray = Gtk::StatusIcon::create("discord");
+        m_tray->signal_activate().connect(sigc::mem_fun(*this, &Abaddon::on_tray_click));
+        m_tray->signal_popup_menu().connect(sigc::mem_fun(*this, &Abaddon::on_tray_popup_menu));
+    }
+    m_tray_menu = Gtk::make_managed<Gtk::Menu>();
+    m_tray_exit = Gtk::make_managed<Gtk::MenuItem>("Quit", false);
 
+    m_tray_exit->signal_activate().connect(sigc::mem_fun(*this, &Abaddon::on_tray_menu_click));
+
+    m_tray_menu->append(*m_tray_exit);
+    m_tray_menu->show_all();
+
+    m_main_window->signal_hide().connect(sigc::mem_fun(*this, &Abaddon::on_window_hide));
     m_gtk_app->signal_shutdown().connect(sigc::mem_fun(*this, &Abaddon::OnShutdown), false);
 
     m_main_window->UpdateMenus();
 
+    m_gtk_app->hold();
     m_main_window->show();
 
     RunFirstTimeDiscordStartup();
@@ -937,6 +951,21 @@ EmojiResource &Abaddon::GetEmojis() {
     return m_emojis;
 }
 
+void Abaddon::on_tray_click() {
+    m_main_window->set_visible(!m_main_window->is_visible());
+}
+void Abaddon::on_tray_menu_click() {
+    m_gtk_app->quit();
+}
+void Abaddon::on_tray_popup_menu(int button, int activate_time) {
+    m_tray->popup_menu_at_position(*m_tray_menu, button, activate_time);
+}
+void Abaddon::on_window_hide() {
+    if (!m_settings.GetSettings().HideToTray) {
+        m_gtk_app->quit();
+    }
+}
+
 int main(int argc, char **argv) {
     if (std::getenv("ABADDON_NO_FC") == nullptr)
         Platform::SetupFonts();

src/abaddon.hpp

@@ -117,6 +117,8 @@ protected:
     Gtk::MenuItem *m_user_menu_roles;
     Gtk::MenuItem *m_user_menu_remove_recipient;
     Gtk::Menu *m_user_menu_roles_submenu;
+    Gtk::Menu *m_tray_menu;
+    Gtk::MenuItem *m_tray_exit;
 
     void on_user_menu_insert_mention();
     void on_user_menu_ban();
@@ -124,6 +126,10 @@ protected:
     void on_user_menu_copy_id();
     void on_user_menu_open_dm();
     void on_user_menu_remove_recipient();
+    void on_tray_click();
+    void on_tray_popup_menu(int button, int activate_time);
+    void on_tray_menu_click();
+    void on_window_hide();
 
 private:
     SettingsManager m_settings;
@@ -142,5 +148,6 @@ private:
     Glib::RefPtr<Gtk::Application> m_gtk_app;
     Glib::RefPtr<Gtk::CssProvider> m_css_provider;
     Glib::RefPtr<Gtk::CssProvider> m_css_low_provider; // registered with a lower priority to allow better customization
-    std::unique_ptr<MainWindow> m_main_window;         // wah wah cant create a gtkstylecontext fuck you
+    Glib::RefPtr<Gtk::StatusIcon> m_tray;
+    std::unique_ptr<MainWindow> m_main_window; // wah wah cant create a gtkstylecontext fuck you
 };

src/settings.cpp

@@ -48,6 +48,7 @@ void SettingsManager::ReadSettings() {
     SMBOOL("gui", "save_state", SaveState);
     SMBOOL("gui", "stock_emojis", ShowStockEmojis);
     SMBOOL("gui", "unreads", Unreads);
+    SMBOOL("gui", "hide_to_tray", HideToTray);
     SMINT("http", "concurrent", CacheHTTPConcurrency);
     SMSTR("http", "user_agent", UserAgent);
     SMSTR("style", "expandercolor", ChannelsExpanderColor);
@@ -101,6 +102,7 @@ void SettingsManager::Close() {
         SMBOOL("gui", "save_state", SaveState);
         SMBOOL("gui", "stock_emojis", ShowStockEmojis);
         SMBOOL("gui", "unreads", Unreads);
+        SMBOOL("gui", "hide_to_tray", HideToTray);
         SMINT("http", "concurrent", CacheHTTPConcurrency);
         SMSTR("http", "user_agent", UserAgent);
         SMSTR("style", "expandercolor", ChannelsExpanderColor);

src/settings.hpp

@@ -28,6 +28,8 @@ public:
 #endif
         bool Unreads { true };
 
+        bool HideToTray { false };
+
         // [http]
         int CacheHTTPConcurrency { 20 };
         std::string UserAgent { "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36" };

src/windows/mainwindow.hpp

@@ -83,6 +83,7 @@ private:
     Gtk::MenuItem m_menu_view_go_back;
     Gtk::MenuItem m_menu_view_go_forward;
 #endif
+
     void OnViewSubmenuPopup();
 
 public: