LibGUI+WindowServer: Add WM_SuperKeyPressed event

This commit adds an event called WM_SuperKeyPressed which is sent to all
windows via WindowManagerServerConnection.
The event is fired from WindowManager when the super key is pressed,
which is the windows key on most keyboards :)

Userland/Libraries/LibGUI/Event.h

@@ -82,6 +82,7 @@ public:
         WM_WindowRectChanged,
         WM_WindowIconBitmapChanged,
         WM_AppletAreaSizeChanged,
+        WM_SuperKeyPressed,
         __End_WM_Events,
     };
 
@@ -113,6 +114,14 @@ private:
     int m_window_id { -1 };
 };
 
+class WMSuperKeyPressedEvent : public WMEvent {
+public:
+    explicit WMSuperKeyPressedEvent(int client_id)
+        : WMEvent(Event::Type::WM_SuperKeyPressed, client_id, 0)
+    {
+    }
+};
+
 class WMAppletAreaSizeChangedEvent : public WMEvent {
 public:
     explicit WMAppletAreaSizeChangedEvent(const Gfx::IntSize& size)

Userland/Libraries/LibGUI/WindowManagerServerConnection.cpp

@@ -74,4 +74,10 @@ void WindowManagerServerConnection::handle(const Messages::WindowManagerClient::
     if (auto* window = Window::from_window_id(message.wm_id()))
         Core::EventLoop::current().post_event(*window, make<WMWindowRemovedEvent>(message.client_id(), message.window_id()));
 }
+
+void WindowManagerServerConnection::handle(const Messages::WindowManagerClient::SuperKeyPressed& message)
+{
+    if (auto* window = Window::from_window_id(message.wm_id()))
+        Core::EventLoop::current().post_event(*window, make<WMSuperKeyPressedEvent>(message.wm_id()));
+}
 }

Userland/Libraries/LibGUI/WindowManagerServerConnection.h

@@ -52,6 +52,7 @@ private:
     virtual void handle(const Messages::WindowManagerClient::WindowIconBitmapChanged&) override;
     virtual void handle(const Messages::WindowManagerClient::WindowRectChanged&) override;
     virtual void handle(const Messages::WindowManagerClient::AppletAreaSizeChanged&) override;
+    virtual void handle(const Messages::WindowManagerClient::SuperKeyPressed&) override;
 };
 
 }

Userland/Services/WindowServer/WindowManager.cpp

@@ -34,6 +34,7 @@
 #include "Window.h"
 #include <AK/StdLibExtras.h>
 #include <AK/Vector.h>
+#include <LibGUI/WindowManagerServerConnection.h>
 #include <LibGfx/Bitmap.h>
 #include <LibGfx/CharacterBitmap.h>
 #include <LibGfx/Font.h>
@@ -377,6 +378,17 @@ void WindowManager::tell_wms_applet_area_size_changed(const Gfx::IntSize& size)
     });
 }
 
+void WindowManager::tell_wms_super_key_pressed()
+{
+    for_each_window_manager([](WMClientConnection& conn) {
+        if (conn.window_id() < 0)
+            return IterationDecision::Continue;
+
+        conn.post_message(Messages::WindowManagerClient::SuperKeyPressed(conn.window_id()));
+        return IterationDecision::Continue;
+    });
+}
+
 static bool window_type_has_title(WindowType type)
 {
     return type == WindowType::Normal || type == WindowType::ToolWindow;
@@ -1182,6 +1194,9 @@ Gfx::IntRect WindowManager::arena_rect_for_type(WindowType type) const
 void WindowManager::event(Core::Event& event)
 {
     if (static_cast<Event&>(event).is_mouse_event()) {
+        if (event.type() != Event::MouseMove)
+            m_previous_event_was_super_keydown = false;
+
         Window* hovered_window = nullptr;
         process_mouse_event(static_cast<MouseEvent&>(event), hovered_window);
         set_hovered_window(hovered_window);
@@ -1211,7 +1226,17 @@ void WindowManager::event(Core::Event& event)
             return;
         }
 
-        if (MenuManager::the().current_menu()) {
+        if (key_event.type() == Event::KeyDown && key_event.key() == Key_Super) {
+            m_previous_event_was_super_keydown = true;
+        } else if (m_previous_event_was_super_keydown) {
+            m_previous_event_was_super_keydown = false;
+            if (!m_dnd_client && key_event.type() == Event::KeyUp && key_event.key() == Key_Super) {
+                tell_wms_super_key_pressed();
+                return;
+            }
+        }
+
+        if (MenuManager::the().current_menu() && key_event.key() != Key_Super) {
             MenuManager::the().dispatch_event(event);
             return;
         }

Userland/Services/WindowServer/WindowManager.h

@@ -175,6 +175,7 @@ public:
     void tell_wms_window_icon_changed(Window&);
     void tell_wms_window_rect_changed(Window&);
     void tell_wms_applet_area_size_changed(const Gfx::IntSize&);
+    void tell_wms_super_key_pressed();
 
     bool is_active_window_or_accessory(Window&) const;
 
@@ -334,6 +335,7 @@ private:
     DoubleClickInfo m_double_click_info;
     int m_double_click_speed { 0 };
     int m_max_distance_for_double_click { 4 };
+    bool m_previous_event_was_super_keydown { false };
 
     WeakPtr<Window> m_active_window;
     WeakPtr<Window> m_hovered_window;

Userland/Services/WindowServer/WindowManagerClient.ipc

@@ -5,4 +5,5 @@ endpoint WindowManagerClient = 1872
     WindowIconBitmapChanged(i32 wm_id, i32 client_id, i32 window_id, Gfx::ShareableBitmap bitmap) =|
     WindowRectChanged(i32 wm_id, i32 client_id, i32 window_id, Gfx::IntRect rect) =|
     AppletAreaSizeChanged(i32 wm_id, Gfx::IntSize size) =|
+    SuperKeyPressed(i32 wm_id) =|
 }