Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/idatapackage.h

@@ -0,0 +1,99 @@
+// This file is part of VSTGUI. It is subject to the license terms 
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#pragma once
+
+#include "vstguibase.h"
+
+namespace VSTGUI {
+
+//-----------------------------------------------------------------------------
+///	@brief interface for drag&drop and clipboard data
+//-----------------------------------------------------------------------------
+class IDataPackage : public AtomicReferenceCounted
+{
+public:
+	enum Type {
+		/** File type (UTF-8 C-String) */
+		kFilePath = 0,
+		/** Text type (UTF-8 C-String) */
+		kText,
+		/** Binary type */
+		kBinary,
+
+		kError = -1
+	};
+
+	virtual uint32_t getCount () const = 0;
+	virtual uint32_t getDataSize (uint32_t index) const = 0;
+	virtual Type getDataType (uint32_t index) const = 0;
+	virtual uint32_t getData (uint32_t index, const void*& buffer, Type& type) const = 0;
+
+protected:
+	IDataPackage () {}
+};
+
+//-----------------------------------------------------------------------------
+/** IDataPackage iterator
+ *
+ *	@ingroup new_in_4_12
+ */
+struct DataPackageIterator
+{
+	struct Item
+	{
+		IDataPackage::Type type {IDataPackage::Type::kError};
+		uint32_t dataSize {0};
+		const void* data {nullptr};
+	};
+
+	DataPackageIterator (IDataPackage* pkg, uint32_t index = 0u) : pkg (pkg), index (index) {}
+
+	DataPackageIterator& operator++ ()
+	{
+		item = {};
+		index++;
+		return *this;
+	}
+
+	const Item& operator->() const
+	{
+		gatherItem ();
+		return item;
+	}
+
+	const Item& operator* () const
+	{
+		gatherItem ();
+		return item;
+	}
+
+	bool operator!= (const DataPackageIterator& other) const
+	{
+		return other.pkg != pkg || other.index != index;
+	}
+
+	uint32_t getIndex () const { return index; }
+
+private:
+	void gatherItem () const
+	{
+		if (item.data == nullptr && pkg && index < pkg->getCount ())
+			item.dataSize = pkg->getData (index, item.data, item.type);
+	}
+	IDataPackage* pkg {nullptr};
+	uint32_t index {0u};
+	mutable Item item;
+};
+
+//-----------------------------------------------------------------------------
+inline DataPackageIterator begin (IDataPackage* pkg) { return DataPackageIterator (pkg); }
+
+//-----------------------------------------------------------------------------
+inline DataPackageIterator end (IDataPackage* pkg)
+{
+	return DataPackageIterator (pkg, pkg->getCount ());
+}
+
+} // VSTGUI