Fix incorrect results when applying some timing operations to

more than one piece of content at once (e.g. trim start).

1 files changed, 77 insertions, 0 deletions

diff --git a/src/wx/suspender.cc b/src/wx/suspender.cc
new file mode 100644
index 000000000..9b1b64c85
--- /dev/null
+++ b/src/wx/suspender.cc
@@ -0,0 +1,77 @@
+/*
+    Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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.
+
+    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "suspender.h"
+#include <boost/foreach.hpp>
+
+Suspender::Suspender(boost::function<void (int)> handler)
+	: _handler (handler)
+	, _count (0)
+{
+
+}
+
+Suspender::Block::Block (Suspender* s)
+	: _suspender (s)
+{
+	_suspender->increment ();
+}
+
+Suspender::Block::~Block ()
+{
+	_suspender->decrement ();
+}
+
+Suspender::Block
+Suspender::block ()
+{
+	return Block (this);
+}
+
+void
+Suspender::increment ()
+{
+	++_count;
+}
+
+void
+Suspender::decrement ()
+{
+	--_count;
+	if (_count == 0) {
+		BOOST_FOREACH (int i, _pending) {
+			_handler (i);
+		}
+		_pending.clear ();
+	}
+}
+
+bool
+Suspender::check (int property)
+{
+	if (_count == 0) {
+		return false;
+	}
+
+	_pending.insert (property);
+	return true;
+}
+
+