Simplify client-side API for Wayland extensions

This simplifies the client-side API for Wayland extensions by
introducing QWaylandClientExtension/QWaylandClientExtensionTemplate
classes. These classes takes care of the initialization of the extension
if it matches the interface name.

Change-Id: I7c4fb34563563af4be072cdebda54954b79cddbe
Reviewed-by: Johan Helsing <johan.helsing@theqtcompany.com>
Reviewed-by: Giulio Camuffo <giulio.camuffo@kdab.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/qtwaylandscanner/qtwaylandscanner.cpp b/src/qtwaylandscanner/qtwaylandscanner.cpp
index afe3b80ec..b609523b6 100644
--- a/src/qtwaylandscanner/qtwaylandscanner.cpp
+++ b/src/qtwaylandscanner/qtwaylandscanner.cpp
@@ -878,6 +878,8 @@ void process(QXmlStreamReader &xml, const QByteArray &headerPath, const QByteArr
             printf("        const struct ::%s *object() const { return m_%s; }\n", interfaceName, interfaceName);
             printf("\n");
             printf("        bool isInitialized() const;\n");
+            printf("\n");
+            printf("        static const struct ::wl_interface *interface();\n");
 
             printEnums(interface.enums);
 
@@ -1003,6 +1005,12 @@ void process(QXmlStreamReader &xml, const QByteArray &headerPath, const QByteArr
             printf("    {\n");
             printf("        return m_%s != 0;\n", interfaceName);
             printf("    }\n");
+            printf("\n");
+
+            printf("    const struct wl_interface *%s::interface()\n", interfaceName);
+            printf("    {\n");
+            printf("        return &::%s_interface;\n", interfaceName);
+            printf("    }\n");
 
             for (int i = 0; i < interface.requests.size(); ++i) {
                 printf("\n");