Add an IPlugView wrapper

meson.build

@@ -77,6 +77,7 @@ vst3_plugin_sources = [
   'src/common/communication/common.cpp',
   'src/common/logging/common.cpp',
   'src/common/logging/vst3.cpp',
+  'src/common/serialization/vst3/plug-view/plug-view.cpp',
   'src/common/serialization/vst3/plugin/audio-processor.cpp',
   'src/common/serialization/vst3/plugin/component.cpp',
   'src/common/serialization/vst3/plugin/connection-point.cpp',
@@ -125,6 +126,7 @@ host_sources = [
 if with_vst3
   host_sources += [
     'src/common/logging/vst3.cpp',
+    'src/common/serialization/vst3/plug-view/plug-view.cpp',
     'src/common/serialization/vst3/plugin/audio-processor.cpp',
     'src/common/serialization/vst3/plugin/component.cpp',
     'src/common/serialization/vst3/plugin/connection-point.cpp',

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

@@ -0,0 +1,26 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "plug-view.h"
+
+YaPlugView::ConstructArgs::ConstructArgs() {}
+
+YaPlugView::ConstructArgs::ConstructArgs(
+    Steinberg::IPtr<Steinberg::FUnknown> object)
+    : supported(Steinberg::FUnknownPtr<Steinberg::IPlugView>(object)) {}
+
+YaPlugView::YaPlugView(const ConstructArgs&& args)
+    : arguments(std::move(args)) {}

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

@@ -0,0 +1,90 @@
+// yabridge: a Wine VST bridge
+// Copyright (C) 2020  Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <pluginterfaces/gui/iplugview.h>
+
+#include "../../common.h"
+#include "../base.h"
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+
+/**
+ * Wraps around `IPlugView` for serialization purposes. This is instantiated as
+ * part of `Vst3PlugViewProxy`.
+ */
+class YaPlugView : public Steinberg::IPlugView {
+   public:
+    /**
+     * These are the arguments for creating a `YaPlugView`.
+     */
+    struct ConstructArgs {
+        ConstructArgs();
+
+        /**
+         * Check whether an existing implementation implements `IPlugView` and
+         * read arguments from it.
+         */
+        ConstructArgs(Steinberg::IPtr<Steinberg::FUnknown> object);
+
+        /**
+         * Whether the object supported this interface.
+         */
+        bool supported;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value1b(supported);
+        }
+    };
+
+    /**
+     * Instantiate this instance with arguments read from another interface
+     * implementation.
+     */
+    YaPlugView(const ConstructArgs&& args);
+
+    inline bool supported() const { return arguments.supported; }
+
+    virtual tresult PLUGIN_API
+    isPlatformTypeSupported(Steinberg::FIDString type) override = 0;
+    virtual tresult PLUGIN_API attached(void* parent,
+                                        Steinberg::FIDString type) override = 0;
+    virtual tresult PLUGIN_API removed() override = 0;
+    virtual tresult PLUGIN_API onWheel(float distance) override = 0;
+    virtual tresult PLUGIN_API onKeyDown(char16 key,
+                                         int16 keyCode,
+                                         int16 modifiers) override = 0;
+    virtual tresult PLUGIN_API onKeyUp(char16 key,
+                                       int16 keyCode,
+                                       int16 modifiers) override = 0;
+    virtual tresult PLUGIN_API getSize(Steinberg::ViewRect* size) override = 0;
+    virtual tresult PLUGIN_API
+    onSize(Steinberg::ViewRect* newSize) override = 0;
+    virtual tresult PLUGIN_API onFocus(TBool state) override = 0;
+    virtual tresult PLUGIN_API
+    setFrame(Steinberg::IPlugFrame* frame) override = 0;
+    virtual tresult PLUGIN_API canResize() override = 0;
+    virtual tresult PLUGIN_API
+    checkSizeConstraint(Steinberg::ViewRect* rect) override = 0;
+
+   protected:
+    ConstructArgs arguments;
+};
+
+#pragma GCC diagnostic pop