WindowServer+Taskbar: Show applets in taskbar :^)

WindowServer now collects applet windows into an "applet area" which is
really just a window that a WM (window management) client can position
via IPC.

This is rather hackish, and I think we should come up with a better
architecture eventually, but this brings back the missing applets since
the global menu where they used to live is gone.

3 files changed, 22 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGUI/Event.h b/Userland/Libraries/LibGUI/Event.h
index b8898f7bde..0841e2026d 100644
--- a/Userland/Libraries/LibGUI/Event.h
+++ b/Userland/Libraries/LibGUI/Event.h
@@ -77,6 +77,7 @@ public:
         WM_WindowStateChanged,
         WM_WindowRectChanged,
         WM_WindowIconBitmapChanged,
+        WM_AppletAreaSizeChanged,
         __End_WM_Events,
     };
 
@@ -108,6 +109,20 @@ private:
     int m_window_id { -1 };
 };
 
+class WMAppletAreaSizeChangedEvent : public WMEvent {
+public:
+    explicit WMAppletAreaSizeChangedEvent(const Gfx::IntSize& size)
+        : WMEvent(Event::Type::WM_AppletAreaSizeChanged, 0, 0)
+        , m_size(size)
+    {
+    }
+
+    const Gfx::IntSize& size() const { return m_size; }
+
+private:
+    Gfx::IntSize m_size;
+};
+
 class WMWindowRemovedEvent : public WMEvent {
 public:
     WMWindowRemovedEvent(int client_id, int window_id)
diff --git a/Userland/Libraries/LibGUI/WindowServerConnection.cpp b/Userland/Libraries/LibGUI/WindowServerConnection.cpp
index aa819cc850..847c6febab 100644
--- a/Userland/Libraries/LibGUI/WindowServerConnection.cpp
+++ b/Userland/Libraries/LibGUI/WindowServerConnection.cpp
@@ -269,6 +269,12 @@ void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowState
         Core::EventLoop::current().post_event(*window, make<WMWindowStateChangedEvent>(message.client_id(), message.window_id(), message.parent_client_id(), message.parent_window_id(), message.title(), message.rect(), message.is_active(), message.is_modal(), static_cast<WindowType>(message.window_type()), message.is_minimized(), message.is_frameless(), message.progress()));
 }
 
+void WindowServerConnection::handle(const Messages::WindowClient::WM_AppletAreaSizeChanged& message)
+{
+    if (auto* window = Window::from_window_id(message.wm_id()))
+        Core::EventLoop::current().post_event(*window, make<WMAppletAreaSizeChangedEvent>(message.size()));
+}
+
 void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowRectChanged& message)
 {
     if (auto* window = Window::from_window_id(message.wm_id()))
diff --git a/Userland/Libraries/LibGUI/WindowServerConnection.h b/Userland/Libraries/LibGUI/WindowServerConnection.h
index 49850e3839..4e9a29e649 100644
--- a/Userland/Libraries/LibGUI/WindowServerConnection.h
+++ b/Userland/Libraries/LibGUI/WindowServerConnection.h
@@ -69,6 +69,7 @@ private:
     virtual void handle(const Messages::WindowClient::WM_WindowStateChanged&) override;
     virtual void handle(const Messages::WindowClient::WM_WindowIconBitmapChanged&) override;
     virtual void handle(const Messages::WindowClient::WM_WindowRectChanged&) override;
+    virtual void handle(const Messages::WindowClient::WM_AppletAreaSizeChanged&) override;
     virtual void handle(const Messages::WindowClient::AsyncSetWallpaperFinished&) override;
     virtual void handle(const Messages::WindowClient::DragDropped&) override;
     virtual void handle(const Messages::WindowClient::DragAccepted&) override;