Implement IPlugView::attached()

src/common/logging/vst3.cpp

@@ -447,6 +447,20 @@ bool Vst3Logger::log_request(
     });
 }
 
+bool Vst3Logger::log_request(bool is_host_vst,
+                             const YaPlugView::Attached& request) {
+    return log_request_base(is_host_vst, [&](auto& message) {
+        message << request.owner_instance_id
+                << ": IPlugView::attached(parent = " << request.parent
+                << ", type = \"" << request.type;
+        if (request.type == Steinberg::kPlatformTypeX11EmbedWindowID) {
+            message << "\" (will be translated to \""
+                    << Steinberg::kPlatformTypeHWND << "\")";
+        }
+        message << ")";
+    });
+}
+
 bool Vst3Logger::log_request(bool is_host_vst,
                              const YaPluginBase::Initialize& request) {
     return log_request_base(is_host_vst, [&](auto& message) {

src/common/logging/vst3.h

@@ -110,6 +110,7 @@ class Vst3Logger {
     bool log_request(bool is_host_vst, const YaEditController::CreateView&);
     bool log_request(bool is_host_vst,
                      const YaPlugView::IsPlatformTypeSupported&);
+    bool log_request(bool is_host_vst, const YaPlugView::Attached&);
     bool log_request(bool is_host_vst, const YaPluginBase::Initialize&);
     bool log_request(bool is_host_vst, const YaPluginBase::Terminate&);
     bool log_request(bool is_host_vst, const YaPluginFactory::Construct&);

src/common/serialization/vst3.h

@@ -93,6 +93,7 @@ using ControlRequest = std::variant<Vst3PlugViewProxy::Destruct,
                                     YaEditController::SetComponentHandler,
                                     YaEditController::CreateView,
                                     YaPlugView::IsPlatformTypeSupported,
+                                    YaPlugView::Attached,
                                     YaPluginBase::Initialize,
                                     YaPluginBase::Terminate,
                                     YaPluginFactory::Construct,

src/common/serialization/vst3/plug-view/plug-view.h

@@ -84,6 +84,32 @@ class YaPlugView : public Steinberg::IPlugView {
 
     virtual tresult PLUGIN_API
     isPlatformTypeSupported(Steinberg::FIDString type) override = 0;
+
+    /**
+     * Message to pass through a call to `IPlugView::attached(parent, type)` to
+     * the Wine plugin host. Like mentioned above we will substitute
+     * `kPlatformStringWin` for `kPlatformStringLinux`.
+     */
+    struct Attached {
+        using Response = UniversalTResult;
+
+        native_size_t owner_instance_id;
+
+        /**
+         * The parent handle passed by the host. This will be an
+         * `xcb_window_id`, and we'll embed the Wine window into it ourselves.
+         */
+        native_size_t parent;
+        std::string type;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(owner_instance_id);
+            s.value8b(parent);
+            s.text1b(type, 128);
+        }
+    };
+
     virtual tresult PLUGIN_API attached(void* parent,
                                         Steinberg::FIDString type) override = 0;
     virtual tresult PLUGIN_API removed() override = 0;