tray: implement hiding functionality (#2723)

* tray hiding works

* clang-format

* Implemented suggestions

include/events/signal.hpp

@@ -110,6 +110,9 @@ namespace signals {
     struct tray_pos_change : public detail::value_signal<tray_pos_change, int> {
       using base_type::base_type;
     };
+    struct tray_visibility : public detail::value_signal<tray_visibility, bool> {
+      using base_type::base_type;
+    };
   } // namespace ui_tray
 } // namespace signals
 

include/events/signal_fwd.hpp

@@ -38,7 +38,8 @@ namespace signals {
     struct mapped_clients;
     struct tray_width_change;
     struct tray_pos_change;
-  }
+    struct tray_visibility;
+  } // namespace ui_tray
 } // namespace signals
 
 POLYBAR_NS_END

include/x11/tray_manager.hpp

@@ -65,11 +65,12 @@ struct tray_settings {
   bool detached{false};
 };
 
-class tray_manager : public xpp::event::sink<evt::expose, evt::visibility_notify, evt::client_message,
-                         evt::configure_request, evt::resize_request, evt::selection_clear, evt::property_notify,
-                         evt::reparent_notify, evt::destroy_notify, evt::map_notify, evt::unmap_notify>,
-                     public signal_receiver<SIGN_PRIORITY_TRAY, signals::ui::visibility_change, signals::ui::dim_window,
-                         signals::ui::update_background, signals::ui_tray::tray_pos_change> {
+class tray_manager
+    : public xpp::event::sink<evt::expose, evt::visibility_notify, evt::client_message, evt::configure_request,
+          evt::resize_request, evt::selection_clear, evt::property_notify, evt::reparent_notify, evt::destroy_notify,
+          evt::map_notify, evt::unmap_notify>,
+      public signal_receiver<SIGN_PRIORITY_TRAY, signals::ui::visibility_change, signals::ui::dim_window,
+          signals::ui::update_background, signals::ui_tray::tray_pos_change, signals::ui_tray::tray_visibility> {
  public:
   using make_type = unique_ptr<tray_manager>;
   static make_type make(const bar_settings& settings);
@@ -122,6 +123,7 @@ class tray_manager : public xpp::event::sink<evt::expose, evt::visibility_notify
   void remove_client(shared_ptr<tray_client>& client, bool reconfigure = true);
   void remove_client(xcb_window_t win, bool reconfigure = true);
   unsigned int mapped_clients() const;
+  bool change_visibility(bool visible);
 
   void handle(const evt::expose& evt) override;
   void handle(const evt::visibility_notify& evt) override;
@@ -139,6 +141,7 @@ class tray_manager : public xpp::event::sink<evt::expose, evt::visibility_notify
   bool on(const signals::ui::dim_window& evt) override;
   bool on(const signals::ui::update_background& evt) override;
   bool on(const signals::ui_tray::tray_pos_change& evt) override;
+  bool on(const signals::ui_tray::tray_visibility& evt) override;
 
  private:
   connection& m_connection;

src/components/renderer.cpp

@@ -828,6 +828,9 @@ void renderer::apply_tray_position(const tags::context& context) {
     int absolute_x = static_cast<int>(
         block_x(context.get_relative_tray_position().first) + context.get_relative_tray_position().second);
     m_sig.emit(signals::ui_tray::tray_pos_change{absolute_x});
+    m_sig.emit(signals::ui_tray::tray_visibility{true});
+  } else {
+    m_sig.emit(signals::ui_tray::tray_visibility{false});
   }
 }
 

src/x11/tray_manager.cpp

@@ -914,6 +914,29 @@ unsigned int tray_manager::mapped_clients() const {
   return mapped_clients;
 }
 
+bool tray_manager::change_visibility(bool visible) {
+  unsigned int clients{mapped_clients()};
+
+  m_log.trace("tray: visibility_change (state=%i, activated=%i, mapped=%i, hidden=%i)", visible,
+      static_cast<bool>(m_activated), static_cast<bool>(m_mapped), static_cast<bool>(m_hidden));
+
+  m_hidden = !visible;
+
+  if (!m_activated) {
+    return false;
+  } else if (!m_hidden && !m_mapped && clients) {
+    m_connection.map_window(m_tray);
+  } else if ((!clients || m_hidden) && m_mapped) {
+    m_connection.unmap_window(m_tray);
+  } else if (m_mapped && !m_hidden && clients) {
+    redraw_window();
+  }
+
+  m_connection.flush();
+
+  return true;
+}
+
 /**
  * Event callback : XCB_EXPOSE
  */
@@ -1024,7 +1047,8 @@ void tray_manager::handle(const evt::property_notify& evt) {
   }
 
   // React an wallpaper change, if bar has transparency
-  if (m_opts.transparent && (evt->atom == _XROOTPMAP_ID || evt->atom == _XSETROOT_ID || evt->atom == ESETROOT_PMAP_ID)) {
+  if (m_opts.transparent &&
+      (evt->atom == _XROOTPMAP_ID || evt->atom == _XSETROOT_ID || evt->atom == ESETROOT_PMAP_ID)) {
     redraw_window(true);
     return;
   }
@@ -1132,27 +1156,7 @@ void tray_manager::handle(const evt::unmap_notify& evt) {
  * toggle the tray window whenever the visibility of the bar window changes.
  */
 bool tray_manager::on(const signals::ui::visibility_change& evt) {
-  bool visible{evt.cast()};
-  unsigned int clients{mapped_clients()};
-
-  m_log.trace("tray: visibility_change (state=%i, activated=%i, mapped=%i, hidden=%i)", visible,
-      static_cast<bool>(m_activated), static_cast<bool>(m_mapped), static_cast<bool>(m_hidden));
-
-  m_hidden = !visible;
-
-  if (!m_activated) {
-    return false;
-  } else if (!m_hidden && !m_mapped && clients) {
-    m_connection.map_window(m_tray);
-  } else if ((!clients || m_hidden) && m_mapped) {
-    m_connection.unmap_window(m_tray);
-  } else if (m_mapped && !m_hidden && clients) {
-    redraw_window();
-  }
-
-  m_connection.flush();
-
-  return true;
+  return change_visibility(evt.cast());
 }
 
 bool tray_manager::on(const signals::ui::dim_window& evt) {
@@ -1178,4 +1182,8 @@ bool tray_manager::on(const signals::ui_tray::tray_pos_change& evt) {
   return true;
 }
 
+bool tray_manager::on(const signals::ui_tray::tray_visibility& evt) {
+  return change_visibility(evt.cast());
+}
+
 POLYBAR_NS_END