xdgoutput_v1: Do not send a done event to every client when a client binds

When binding we just need to be talking to the one client to make sure
it's set up. This saves us from waking up every other process only to
realise that nothing happened.

src/wayland/output_interface.cpp

@@ -398,6 +398,11 @@ void OutputInterface::done()
     }
 }
 
+void OutputInterface::done(wl_client *client)
+{
+    d->sendDone(d->resourceMap().value(client));
+}
+
 OutputInterface *OutputInterface::get(wl_resource *native)
 {
     if (auto outputPrivate = resource_cast<OutputInterfacePrivate *>(native)) {

src/wayland/output_interface.h

@@ -13,6 +13,7 @@
 #include <QSize>
 
 struct wl_resource;
+struct wl_client;
 
 namespace KWaylandServer
 {
@@ -118,6 +119,11 @@ public:
      */
     void done();
 
+    /**
+     * Submit changes to @p client.
+     */
+    void done(wl_client *client);
+
     static OutputInterface *get(wl_resource *native);
 
 Q_SIGNALS:

src/wayland/xdgoutput_v1_interface.cpp

@@ -200,7 +200,7 @@ void XdgOutputV1InterfacePrivate::zxdg_output_v1_bind_resource(Resource *resourc
     if (doneOnce) {
         if (wl_resource_get_version(resource->handle) >= 3) {
             if (output) {
-                output->done();
+                output->done(resource->client());
             }
         } else {
             send_done(resource->handle);