1 files changed, 140 insertions, 0 deletions
diff --git a/sc/source/core/tool/refreshtimer.cxx b/sc/source/core/tool/refreshtimer.cxx
new file mode 100644
index 000000000..1ad6734d9
--- /dev/null
+++ b/sc/source/core/tool/refreshtimer.cxx
@@ -0,0 +1,140 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <refreshtimer.hxx>
+#include <refreshtimerprotector.hxx>
+
+void ScRefreshTimerControl::SetAllowRefresh( bool b )
+{
+    if ( b && nBlockRefresh )
+        --nBlockRefresh;
+    else if ( !b && nBlockRefresh < sal_uInt16(~0) )
+        ++nBlockRefresh;
+}
+
+ScRefreshTimerProtector::ScRefreshTimerProtector( std::unique_ptr<ScRefreshTimerControl> const & rp )
+        :
+        m_rpControl( rp )
+{
+    if ( m_rpControl )
+    {
+        m_rpControl->SetAllowRefresh( false );
+        // wait for any running refresh in another thread to finish
+        std::scoped_lock aGuard( m_rpControl->GetMutex() );
+    }
+}
+
+ScRefreshTimerProtector::~ScRefreshTimerProtector()
+{
+    if ( m_rpControl )
+        m_rpControl->SetAllowRefresh( true );
+}
+
+ScRefreshTimer::ScRefreshTimer() : AutoTimer("ScRefreshTimer"), ppControl(nullptr)
+{
+    SetTimeout( 0 );
+}
+
+ScRefreshTimer::ScRefreshTimer( sal_Int32 nRefreshDelaySeconds ) : AutoTimer("ScRefreshTimer"), ppControl(nullptr)
+{
+    SetTimeout( nRefreshDelaySeconds * 1000 );
+    Launch();
+}
+
+ScRefreshTimer::ScRefreshTimer( const ScRefreshTimer& r ) : AutoTimer( r ), ppControl(nullptr)
+{
+}
+
+ScRefreshTimer::~ScRefreshTimer()
+{
+    if ( IsActive() )
+        Stop();
+}
+
+ScRefreshTimer& ScRefreshTimer::operator=( const ScRefreshTimer& r )
+{
+    if(this == &r)
+        return *this;
+
+    SetRefreshControl(nullptr);
+    AutoTimer::operator=( r );
+    return *this;
+}
+
+bool ScRefreshTimer::operator==( const ScRefreshTimer& r ) const
+{
+    return GetTimeout() == r.GetTimeout();
+}
+
+bool ScRefreshTimer::operator!=( const ScRefreshTimer& r ) const
+{
+    return !ScRefreshTimer::operator==( r );
+}
+
+void ScRefreshTimer::SetRefreshControl( std::unique_ptr<ScRefreshTimerControl> const * pp )
+{
+    ppControl = pp;
+}
+
+void ScRefreshTimer::SetRefreshHandler( const Link<Timer *, void>& rLink )
+{
+    SetInvokeHandler( rLink );
+}
+
+sal_Int32 ScRefreshTimer::GetRefreshDelaySeconds() const
+{
+    return GetTimeout() / 1000;
+}
+
+void ScRefreshTimer::StopRefreshTimer()
+{
+    Stop();
+}
+
+void ScRefreshTimer::SetRefreshDelay( sal_Int32 nSeconds )
+{
+    bool bActive = IsActive();
+    if ( bActive && !nSeconds )
+        Stop();
+    SetTimeout( nSeconds * 1000 );
+    if ( !bActive && nSeconds )
+        Launch();
+}
+
+void ScRefreshTimer::Invoke()
+{
+    if ( ppControl && *ppControl && (*ppControl)->IsRefreshAllowed() )
+    {
+        // now we COULD make the call in another thread ...
+        std::scoped_lock aGuard( (*ppControl)->GetMutex() );
+        Timer::Invoke();
+        // restart from now on, don't execute immediately again if timed out
+        // a second time during refresh
+        if ( IsActive() )
+            Launch();
+    }
+}
+
+void ScRefreshTimer::Launch()
+{
+    if ( GetTimeout() )
+        AutoTimer::Start();
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */