Fix wl_output listener mismatch with newer compositors

Author: ashie

src/fcitx-wayland/core/wl_registry.cpp

@@ -1,6 +1,9 @@
 #include "wl_registry.h"
 #include <cassert>
 namespace fcitx::wayland {
+
+class WlOutput;
+
 const struct wl_registry_listener WlRegistry::listener = {
     [](void *data, wl_registry *wldata, uint32_t name, const char *interface,
        uint32_t version) {

src/fcitx-wayland/core/wl_registry.h

@@ -4,6 +4,19 @@
 #include <wayland-client.h>
 #include "fcitx-utils/signals.h"
 namespace fcitx::wayland {
+
+class WlOutput;
+
+template <typename T>
+static constexpr uint32_t supportedVersion(uint32_t requested) {
+    return requested;
+}
+
+template <>
+constexpr uint32_t supportedVersion<WlOutput>(uint32_t requested) {
+    return std::min(requested, 3u);
+}
+
 class WlRegistry final {
 public:
     static constexpr const char *interface = "wl_registry";
@@ -20,8 +33,10 @@ class WlRegistry final {
     void setUserData(void *userData) { userData_ = userData; }
     template <typename T>
     T *bind(uint32_t name, uint32_t requested_version) {
+        uint32_t version =
+            supportedVersion<T>(requested_version);
         return new T(static_cast<typename T::wlType *>(
-            wl_registry_bind(*this, name, T::wlInterface, requested_version)));
+            wl_registry_bind(*this, name, T::wlInterface, version)));
     }
     auto &global() { return globalSignal_; }
     auto &globalRemove() { return globalRemoveSignal_; }