Implement IEditController2::openHelp

src/common/serialization/vst3.h

@@ -82,6 +82,7 @@ using ControlRequest = std::variant<Vst3PlugViewProxy::Destruct,
                                     YaEditController::SetComponentHandler,
                                     YaEditController::CreateView,
                                     YaEditController2::SetKnobMode,
+                                    YaEditController2::OpenHelp,
                                     YaPlugView::IsPlatformTypeSupported,
                                     YaPlugView::Attached,
                                     YaPlugView::Removed,

src/common/serialization/vst3/plugin/edit-controller-2.h

@@ -81,6 +81,25 @@ class YaEditController2 : public Steinberg::Vst::IEditController2 {
 
     virtual tresult PLUGIN_API
     setKnobMode(Steinberg::Vst::KnobMode mode) override = 0;
+
+    /**
+     * Message to pass through a call to
+     * `IEditController2::openHelp(only_check)` to the Wine plugin host.
+     */
+    struct OpenHelp {
+        using Response = UniversalTResult;
+
+        native_size_t instance_id;
+
+        TBool only_check;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.value1b(only_check);
+        }
+    };
+
     virtual tresult PLUGIN_API openHelp(TBool onlyCheck) override = 0;
     virtual tresult PLUGIN_API openAboutBox(TBool onlyCheck) override = 0;