Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 204 insertions, 0 deletions

diff --git a/slideshow/source/engine/activitiesqueue.cxx b/slideshow/source/engine/activitiesqueue.cxx
new file mode 100644
index 000000000..2e3b29d9d
--- /dev/null
+++ b/slideshow/source/engine/activitiesqueue.cxx
@@ -0,0 +1,204 @@
+/* -*- 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 <tools/diagnose_ex.h>
+#include <osl/diagnose.h>
+#include <sal/log.hxx>
+
+#include <slideshowexceptions.hxx>
+#include <activity.hxx>
+#include <activitiesqueue.hxx>
+
+#include <algorithm>
+#include <memory>
+
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+        ActivitiesQueue::ActivitiesQueue(
+          const std::shared_ptr< ::canvas::tools::ElapsedTime >& pPresTimer ) :
+            mpTimer( pPresTimer ),
+            maCurrentActivitiesWaiting(),
+            maCurrentActivitiesReinsert(),
+            maDequeuedActivities()
+        {
+        }
+
+        ActivitiesQueue::~ActivitiesQueue()
+        {
+            // dispose all queue entries
+            try
+            {
+                for( const auto& pActivity : maCurrentActivitiesWaiting )
+                    pActivity->dispose();
+                for( const auto& pActivity : maCurrentTailActivitiesWaiting )
+                    pActivity->dispose();
+                for( const auto& pActivity : maCurrentActivitiesReinsert )
+                    pActivity->dispose();
+            }
+            catch (const uno::Exception&)
+            {
+                TOOLS_WARN_EXCEPTION("slideshow", "");
+            }
+        }
+
+        bool ActivitiesQueue::addActivity( const ActivitySharedPtr& pActivity )
+        {
+            OSL_ENSURE( pActivity, "ActivitiesQueue::addActivity: activity ptr NULL" );
+
+            if( !pActivity )
+                return false;
+
+            // add entry to waiting list
+            maCurrentActivitiesWaiting.push_back( pActivity );
+
+            return true;
+        }
+
+        bool ActivitiesQueue::addTailActivity(const ActivitySharedPtr &pActivity)
+        {
+            OSL_ENSURE( pActivity, "ActivitiesQueue::addTailActivity: activity ptr NULL" );
+
+            if( !pActivity )
+                return false;
+
+            // Activities that should be processed last are kept in a different
+            // ActivityQueue, and later appended to the end of the maCurrentActivitiesWaiting
+            // on the beginning of ActivitiesQueue::process()
+            maCurrentTailActivitiesWaiting.push_back( pActivity );
+
+            return true;
+        }
+
+        void ActivitiesQueue::process()
+        {
+            SAL_INFO("slideshow.verbose", "ActivitiesQueue: outer loop heartbeat" );
+
+            // If there are activities to be processed last append them to the end of the ActivitiesQueue
+            maCurrentActivitiesWaiting.insert( maCurrentActivitiesWaiting.end(),
+                                               maCurrentTailActivitiesWaiting.begin(),
+                                               maCurrentTailActivitiesWaiting.end() );
+            maCurrentTailActivitiesWaiting.clear();
+
+            // accumulate time lag for all activities, and lag time
+            // base if necessary:
+            double fLag = 0.0;
+            for ( const auto& rxActivity : maCurrentActivitiesWaiting )
+                fLag = std::max<double>( fLag, rxActivity->calcTimeLag() );
+            if (fLag > 0.0)
+            {
+                mpTimer->adjustTimer( -fLag );
+            }
+
+            // process list of activities
+            while( !maCurrentActivitiesWaiting.empty() )
+            {
+                // process topmost activity
+                ActivitySharedPtr pActivity( maCurrentActivitiesWaiting.front() );
+                maCurrentActivitiesWaiting.pop_front();
+
+                bool bReinsert( false );
+
+                try
+                {
+                    // fire up activity
+                    bReinsert = pActivity->perform();
+                }
+                catch( uno::RuntimeException& )
+                {
+                    throw;
+                }
+                catch( uno::Exception& )
+                {
+                    // catch anything here, we don't want
+                    // to leave this scope under _any_
+                    // circumstance. Although, do _not_
+                    // reinsert an activity that threw
+                    // once.
+
+                    // NOTE: we explicitly don't catch(...) here,
+                    // since this will also capture segmentation
+                    // violations and the like. In such a case, we
+                    // still better let our clients now...
+                    TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                }
+                catch( SlideShowException& )
+                {
+                    // catch anything here, we don't want
+                    // to leave this scope under _any_
+                    // circumstance. Although, do _not_
+                    // reinsert an activity that threw
+                    // once.
+
+                    // NOTE: we explicitly don't catch(...) here,
+                    // since this will also capture segmentation
+                    // violations and the like. In such a case, we
+                    // still better let our clients now...
+                    SAL_WARN("slideshow", "::presentation::internal::ActivitiesQueue: Activity threw a SlideShowException, removing from ring" );
+                }
+
+                if( bReinsert )
+                    maCurrentActivitiesReinsert.push_back( pActivity );
+                else
+                    maDequeuedActivities.push_back( pActivity );
+
+                SAL_INFO("slideshow.verbose", "ActivitiesQueue: inner loop heartbeat" );
+            }
+
+            if( !maCurrentActivitiesReinsert.empty() )
+            {
+                // reinsert all processed, but not finished
+                // activities back to waiting queue. With swap(),
+                // we kill two birds with one stone: we reuse the
+                // list nodes, and we clear the
+                // maCurrentActivitiesReinsert list
+                maCurrentActivitiesWaiting.swap( maCurrentActivitiesReinsert );
+            }
+        }
+
+        void ActivitiesQueue::processDequeued()
+        {
+            // notify all dequeued activities from last round
+            for( const auto& pActivity : maDequeuedActivities )
+                pActivity->dequeued();
+            maDequeuedActivities.clear();
+        }
+
+        bool ActivitiesQueue::isEmpty() const
+        {
+            return maCurrentActivitiesWaiting.empty() && maCurrentActivitiesReinsert.empty();
+        }
+
+        void ActivitiesQueue::clear()
+        {
+            // dequeue all entries:
+            for( const auto& pActivity : maCurrentActivitiesWaiting )
+                pActivity->dequeued();
+            ActivityQueue().swap( maCurrentActivitiesWaiting );
+
+            for( const auto& pActivity : maCurrentActivitiesReinsert )
+                pActivity->dequeued();
+            ActivityQueue().swap( maCurrentActivitiesReinsert );
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */