Collect all empty broadcasters and remove them in one go later.

This is to avoid repeated calls to set_empty() on the broadcaster array
which causes array reallocation on each call. Instead, we can store the
segments of broadcasters to be deleted later, and call set_empty() on
those segments to reduce the number of calls to set_empty().

The meat of this is not implemented yet, as EndListeningContext is still
empty.

Change-Id: I914bc2881acee3902c4fec0f6c21aaf4d2489df8

1 files changed, 34 insertions, 0 deletions

diff --git a/sc/inc/listenercontext.hxx b/sc/inc/listenercontext.hxx
new file mode 100644
index 000000000000..584671342444
--- /dev/null
+++ b/sc/inc/listenercontext.hxx
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef SC_LISTENERCONTEXT_HXX
+#define SC_LISTENERCONTEXT_HXX
+
+#include "address.hxx"
+
+class ScDocument;
+
+namespace sc {
+
+class EndListeningContext
+{
+    ScDocument& mrDoc;
+public:
+    EndListeningContext(ScDocument& rDoc);
+    ScDocument& getDoc();
+
+    void addEmptyBroadcasterPosition(SCCOL nCol, SCROW nRow, SCTAB nTab);
+    void purgeEmptyBroadcasters();
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */