Initial release

engine/vendor/vst3sdk/public.sdk/source/vst/vstcomponentbase.cpp

@@ -0,0 +1,160 @@
+//-----------------------------------------------------------------------------
+// Project     : VST SDK
+//
+// Category    : Helpers
+// Filename    : public.sdk/source/vst/vstcomponentbase.cpp
+// Created by  : Steinberg, 05/2005
+// Description : Base class for VST Component and Edit Controller
+//
+//-----------------------------------------------------------------------------
+// This file is part of a Steinberg SDK. It is subject to the license terms
+// in the LICENSE file found in the top-level directory of this distribution
+// and at www.steinberg.net/sdklicenses.
+// No part of the SDK, including this file, may be copied, modified, propagated,
+// or distributed except according to the terms contained in the LICENSE file.
+//-----------------------------------------------------------------------------
+
+#include "vstcomponentbase.h"
+#include "base/source/fstring.h"
+#include "pluginterfaces/base/funknownimpl.h"
+
+namespace Steinberg {
+namespace Vst {
+
+//------------------------------------------------------------------------
+// ComponentBase Implementation
+//------------------------------------------------------------------------
+ComponentBase::ComponentBase ()
+{
+}
+
+//------------------------------------------------------------------------
+ComponentBase::~ComponentBase ()
+{
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ComponentBase::initialize (FUnknown* context)
+{
+	// check if already initialized
+	if (hostContext)
+		return kResultFalse;
+
+	hostContext = context;
+
+	return kResultOk;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ComponentBase::terminate ()
+{
+	// release host interfaces
+	hostContext = nullptr;
+
+	// in case host did not disconnect us,
+	// release peer now
+	if (peerConnection)
+	{
+		peerConnection->disconnect (this);
+		peerConnection = nullptr;
+	}
+
+	return kResultOk;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ComponentBase::connect (IConnectionPoint* other)
+{
+	if (!other)
+		return kInvalidArgument;
+
+	// check if already connected
+	if (peerConnection)
+		return kResultFalse;
+
+	peerConnection = other;
+	return kResultOk;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ComponentBase::disconnect (IConnectionPoint* other)
+{
+	if (peerConnection && other == peerConnection)
+	{
+		peerConnection = nullptr;
+		return kResultOk;
+	}
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+tresult PLUGIN_API ComponentBase::notify (IMessage* message)
+{
+	if (!message)
+		return kInvalidArgument;
+
+	if (FIDStringsEqual (message->getMessageID (), "TextMessage"))
+	{
+		TChar string[256] = {0};
+		if (message->getAttributes ()->getString ("Text", string, sizeof (string)) == kResultOk)
+		{
+			String tmp (string);
+			tmp.toMultiByte (kCP_Utf8);
+			return receiveText (tmp.text8 ());
+		}
+	}
+
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+IMessage* ComponentBase::allocateMessage () const
+{
+	if (auto hostApp = U::cast<IHostApplication> (hostContext))
+		return Vst::allocateMessage (hostApp);
+	return nullptr;
+}
+
+//------------------------------------------------------------------------
+tresult ComponentBase::sendMessage (IMessage* message) const
+{
+	if (message != nullptr && getPeer () != nullptr)
+		return getPeer ()->notify (message);
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+tresult ComponentBase::sendTextMessage (const char8* text) const
+{
+	if (auto msg = owned (allocateMessage ()))
+	{
+		msg->setMessageID ("TextMessage");
+		String tmp (text, kCP_Utf8);
+		if (tmp.length () >= 256)
+			tmp.remove (255);
+		msg->getAttributes ()->setString ("Text", tmp.text16 ());
+		return sendMessage (msg);
+	}
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+tresult ComponentBase::sendMessageID (const char8* messageID) const
+{
+	if (auto msg = owned (allocateMessage ()))
+	{
+		msg->setMessageID (messageID);
+		return sendMessage (msg);
+	}
+	return kResultFalse;
+}
+
+//------------------------------------------------------------------------
+tresult ComponentBase::receiveText (const char8* /*text*/)
+{
+	return kResultOk;
+}
+
+//------------------------------------------------------------------------
+} // namespace Vst
+} // namespace Steinberg