WindowServer+Keymap+LibGUI: Add widget to display current keymap

Userland/Services/WindowServer/KeymapSwitcher.cpp

@@ -12,17 +12,8 @@
 
 namespace WindowServer {
 
-static KeymapSwitcher* s_the;
-
-KeymapSwitcher& KeymapSwitcher::the()
-{
-    VERIFY(s_the);
-    return *s_the;
-}
-
 KeymapSwitcher::KeymapSwitcher()
 {
-    s_the = this;
 }
 
 KeymapSwitcher::~KeymapSwitcher()
@@ -80,10 +71,7 @@ String KeymapSwitcher::get_current_keymap() const
     auto json = JsonValue::from_string(proc_keymap->read_all()).release_value_but_fixme_should_propagate_errors();
     auto const& keymap_object = json.as_object();
     VERIFY(keymap_object.has("keymap"));
-    auto keymap = keymap_object.get("keymap").to_string();
-    dbgln("Current keymap is: {}", keymap);
-
-    return keymap;
+    return keymap_object.get("keymap").to_string();
 }
 
 void KeymapSwitcher::setkeymap(const AK::String& keymap)
@@ -94,6 +82,8 @@ void KeymapSwitcher::setkeymap(const AK::String& keymap)
         perror("posix_spawn");
         dbgln("Failed to call /bin/keymap, error: {} ({})", errno, strerror(errno));
     }
+    if (on_keymap_change)
+        on_keymap_change(keymap);
 }
 
 }

Userland/Services/WindowServer/KeymapSwitcher.h

@@ -11,27 +11,29 @@
 #include <AK/WeakPtr.h>
 #include <LibCore/Object.h>
 #include <LibKeyboard/CharacterMap.h>
+#include <WindowServer/WMClientConnection.h>
 
 namespace WindowServer {
 
 class KeymapSwitcher final : public Core::Object {
     C_OBJECT(KeymapSwitcher)
 public:
-    static KeymapSwitcher& the();
-
     virtual ~KeymapSwitcher() override;
 
     void refresh();
 
     void next_keymap();
 
+    Function<void(String const& keymap)> on_keymap_change;
+
+    String get_current_keymap() const;
+
 private:
     KeymapSwitcher();
 
     Vector<AK::String> m_keymaps;
 
     void setkeymap(AK::String const&);
-    String get_current_keymap() const;
 };
 
 }

Userland/Services/WindowServer/Window.h

@@ -36,6 +36,7 @@ enum WMEventMask {
     WindowIconChanges = 1 << 2,
     WindowRemovals = 1 << 3,
     WorkspaceChanges = 1 << 4,
+    KeymapChanged = 1 << 5,
 };
 
 enum class WindowTileType {

Userland/Services/WindowServer/WindowManager.cpp

@@ -53,6 +53,18 @@ WindowManager::WindowManager(Gfx::PaletteImpl const& palette)
 
     reload_config();
 
+    m_keymap_switcher->on_keymap_change = [&](String const& keymap) {
+        for_each_window_manager([&keymap](WMClientConnection& conn) {
+            if (!(conn.event_mask() & WMEventMask::KeymapChanged))
+                return IterationDecision::Continue;
+            if (conn.window_id() < 0)
+                return IterationDecision::Continue;
+
+            conn.async_keymap_changed(conn.window_id(), keymap);
+            return IterationDecision::Continue;
+        });
+    };
+
     Compositor::the().did_construct_window_manager({});
 }
 

Userland/Services/WindowServer/WindowManagerClient.ipc

@@ -10,4 +10,5 @@ endpoint WindowManagerClient
     super_key_pressed(i32 wm_id) =|
     super_space_key_pressed(i32 wm_id) =|
     workspace_changed(i32 wm_id, u32 row, u32 column) =|
+    keymap_changed(i32 wm_id, [UTF8] String keymap) =|
 }