Some attempts to block referencing of DCPs when it is not possible.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/lib/overlaps.h b/src/lib/overlaps.h
new file mode 100644
index 000000000..6018af15f
--- /dev/null
+++ b/src/lib/overlaps.h
@@ -0,0 +1,39 @@
+/*
+    Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
+
+    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.
+
+*/
+
+/** @return Pieces of content type C that overlap a specified time range in the given ContentList */
+template<class C>
+std::list<boost::shared_ptr<C> >
+overlaps (ContentList cl, DCPTime from, DCPTime to)
+{
+	std::list<boost::shared_ptr<C> > overlaps;
+	DCPTimePeriod period (from, to);
+	for (typename ContentList::const_iterator i = cl.begin(); i != cl.end(); ++i) {
+		boost::shared_ptr<C> c = boost::dynamic_pointer_cast<C> (*i);
+		if (!c) {
+			continue;
+		}
+
+		if (DCPTimePeriod(c->position(), c->end()).overlaps (period)) {
+			overlaps.push_back (c);
+		}
+	}
+
+	return overlaps;
+}