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diff --git a/gtk2_ardour/item_counts.h b/gtk2_ardour/item_counts.h
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+++ b/gtk2_ardour/item_counts.h
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+/*
+    Copyright (C) 2014 Paul Davis
+    Author: David Robillard
+
+    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 2 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, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_item_counts_h__
+#define __ardour_item_counts_h__
+
+#include <cstddef>
+#include <map>
+#include <utility>
+
+#include "ardour/data_type.h"
+#include "evoral/Parameter.hpp"
+
+/** A count of various GUI items.
+ *
+ * This is used to keep track of 'consumption' of a selection when pasting, but
+ * may be useful elsewhere.
+ */
+class ItemCounts
+{
+public:
+	size_t n_playlists(ARDOUR::DataType t) const { return get_n(t, _playlists); }
+	size_t n_regions(ARDOUR::DataType t)   const { return get_n(t, _regions); }
+	size_t n_lines(Evoral::Parameter t)    const { return get_n(t, _lines); }
+
+	void increase_n_playlists(ARDOUR::DataType t, size_t delta=1) {
+		increase_n(t, _playlists, delta);
+	}
+
+	void increase_n_regions(ARDOUR::DataType t, size_t delta=1) {
+		increase_n(t, _regions, delta);
+	}
+
+	void increase_n_lines(Evoral::Parameter t, size_t delta=1) {
+		increase_n(t, _lines, delta);
+	}
+
+private:
+	template<typename Key>
+	size_t
+	get_n(const Key& key, const typename std::map<Key, size_t>& counts) const {
+		typename std::map<Key, size_t>::const_iterator i = counts.find(key);
+		return (i == counts.end()) ? 0 : i->second;
+	}
+
+	template<typename Key>
+	void
+	increase_n(const Key& key, typename std::map<Key, size_t>& counts, size_t delta) {
+		typename std::map<Key, size_t>::iterator i = counts.find(key);
+		if (i != counts.end()) {
+			i->second += delta;
+		} else {
+			counts.insert(std::make_pair(key, delta));
+		}
+	}
+
+	std::map<ARDOUR::DataType,  size_t> _playlists;
+	std::map<ARDOUR::DataType,  size_t> _regions;
+	std::map<Evoral::Parameter, size_t> _lines;
+};
+
+#endif /* __ardour_item_counts_h__ */