1 files changed, 48 insertions, 0 deletions
diff --git a/sc/source/core/inc/sharedstringpoolpurge.hxx b/sc/source/core/inc/sharedstringpoolpurge.hxx
new file mode 100644
index 000000000..76ed42b7e
--- /dev/null
+++ b/sc/source/core/inc/sharedstringpoolpurge.hxx
@@ -0,0 +1,48 @@
+/* -*- 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/.
+ *
+ */
+
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include <svl/sharedstringpool.hxx>
+#include <vcl/timer.hxx>
+
+namespace svl
+{
+class SharedStringPool;
+}
+
+namespace sc
+{
+/*
+Calls svl::SharedStringPool::purge() after a delay when idle. Can be
+used to compress repeated calls, as purge() may be somewhat expensive
+with large documents. And since vcl links to svl, it's not possible
+to use VCL timers in svl, so a separate class is needed.
+*/
+class SharedStringPoolPurge
+{
+public:
+    SharedStringPoolPurge();
+    ~SharedStringPoolPurge();
+    void delayedPurge(const std::shared_ptr<svl::SharedStringPool>& pool);
+
+private:
+    void cleanup();
+    std::vector<std::shared_ptr<svl::SharedStringPool>> mPoolsToPurge;
+    Timer mTimer;
+    static SharedStringPoolPurge* self;
+    DECL_LINK(timerHandler, Timer*, void);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */