1 files changed, 182 insertions, 0 deletions
diff --git a/sd/source/ui/tools/TimerBasedTaskExecution.cxx b/sd/source/ui/tools/TimerBasedTaskExecution.cxx
new file mode 100644
index 000000000000..6822b917cb7d
--- /dev/null
+++ b/sd/source/ui/tools/TimerBasedTaskExecution.cxx
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_sd.hxx"
+
+#include "tools/TimerBasedTaskExecution.hxx"
+#include "tools/AsynchronousTask.hxx"
+#include <tools/time.hxx>
+#include <osl/diagnose.h>
+#include <boost/weak_ptr.hpp>
+
+#undef VERBOSE
+
+namespace sd { namespace tools {
+
+/** Used by the shared_ptr instead of the private destructor.
+*/
+class TimerBasedTaskExecution::Deleter
+{
+public:
+    void operator() (TimerBasedTaskExecution* pObject)
+    {
+        delete pObject;
+    }
+};
+
+
+
+
+::boost::shared_ptr<TimerBasedTaskExecution> TimerBasedTaskExecution::Create (
+    const ::boost::shared_ptr<AsynchronousTask>& rpTask,
+    sal_uInt32 nMillisecondsBetweenSteps,
+    sal_uInt32 nMaxTimePerStep)
+{
+    ::boost::shared_ptr<TimerBasedTaskExecution> pExecution(
+        new TimerBasedTaskExecution(rpTask,nMillisecondsBetweenSteps,nMaxTimePerStep),
+        Deleter());
+    // Let the new object have a shared_ptr to itself, so that it can
+    // release itself when the AsynchronousTask has been executed
+    // completely.
+    pExecution->SetSelf(pExecution);
+    return pExecution;
+}
+
+
+
+
+void TimerBasedTaskExecution::Release (void)
+{
+    maTimer.Stop();
+    mpSelf.reset();
+}
+
+
+
+
+//static
+void TimerBasedTaskExecution::ReleaseTask (
+    const ::boost::weak_ptr<TimerBasedTaskExecution>& rpExecution)
+{
+    if ( ! rpExecution.expired())
+    {
+        try
+        {
+            ::boost::shared_ptr<tools::TimerBasedTaskExecution> pExecution (rpExecution);
+            pExecution->Release();
+        }
+        catch (::boost::bad_weak_ptr)
+        {
+            // When a bad_weak_ptr has been thrown then the object pointed
+            // to by rpTask has been released right after we checked that it
+            // still existed.  Too bad, but that means, that we have nothing
+            // more do.
+        }
+    }
+}
+
+
+
+
+TimerBasedTaskExecution::TimerBasedTaskExecution (
+    const ::boost::shared_ptr<AsynchronousTask>& rpTask,
+    sal_uInt32 nMillisecondsBetweenSteps,
+    sal_uInt32 nMaxTimePerStep)
+    : mpTask(rpTask),
+      maTimer(),
+      mpSelf(),
+      mnMaxTimePerStep(nMaxTimePerStep)
+{
+    Link aLink(LINK(this,TimerBasedTaskExecution,TimerCallback));
+    maTimer.SetTimeoutHdl(aLink);
+    maTimer.SetTimeout(nMillisecondsBetweenSteps);
+    maTimer.Start();
+}
+
+
+
+
+TimerBasedTaskExecution::~TimerBasedTaskExecution (void)
+{
+    maTimer.Stop();
+}
+
+
+
+
+void TimerBasedTaskExecution::SetSelf (
+    const ::boost::shared_ptr<TimerBasedTaskExecution>& rpSelf)
+{
+    if (mpTask.get() != NULL)
+        mpSelf = rpSelf;
+}
+
+
+
+
+IMPL_LINK(TimerBasedTaskExecution,TimerCallback, Timer*,EMPTYARG)
+{
+    if (mpTask.get() != NULL)
+    {
+        if (mpTask->HasNextStep())
+        {
+            // Execute as many steps as fit into the time span of length
+            // mnMaxTimePerStep.  Note that the last step may take longer
+            // than allowed.
+            sal_uInt32 nStartTime (Time().GetMSFromTime());
+#ifdef VERBOSE
+            OSL_TRACE("starting TimerBasedTaskExecution at %d", nStartTime);
+#endif
+            do
+            {
+                mpTask->RunNextStep();
+                sal_uInt32 nDuration (Time().GetMSFromTime()-nStartTime);
+#ifdef VERBOSE
+            OSL_TRACE("executed step in %d", nDuration);
+#endif
+                if (nDuration > mnMaxTimePerStep)
+                    break;
+            }
+            while (mpTask->HasNextStep());
+#ifdef VERBOSE
+            OSL_TRACE("TimerBasedTaskExecution sleeping");
+#endif
+            maTimer.Start();
+        }
+        else
+            mpSelf.reset();
+    }
+
+    return 0;
+}
+
+
+} } // end of namespace ::sd::tools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */