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, 192 insertions, 0 deletions

diff --git a/slideshow/source/engine/activities/discreteactivitybase.cxx b/slideshow/source/engine/activities/discreteactivitybase.cxx
new file mode 100644
index 000000000..2fe0935b6
--- /dev/null
+++ b/slideshow/source/engine/activities/discreteactivitybase.cxx
@@ -0,0 +1,192 @@
+/* -*- 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 "discreteactivitybase.hxx"
+
+
+namespace slideshow::internal
+{
+        DiscreteActivityBase::DiscreteActivityBase( const ActivityParameters& rParms ) :
+            ActivityBase( rParms ),
+            mpWakeupEvent( rParms.mpWakeupEvent ),
+            maDiscreteTimes( rParms.maDiscreteTimes ),
+            mnSimpleDuration( rParms.mnMinDuration ),
+            mnCurrPerformCalls( 0 )
+        {
+            ENSURE_OR_THROW( mpWakeupEvent,
+                              "DiscreteActivityBase::DiscreteActivityBase(): Invalid wakeup event" );
+
+            ENSURE_OR_THROW( !maDiscreteTimes.empty(),
+                              "DiscreteActivityBase::DiscreteActivityBase(): time vector is empty, why do you create me?" );
+
+#ifdef DBG_UTIL
+            // check parameters: rDiscreteTimes must be sorted in
+            // ascending order, and contain values only from the range
+            // [0,1]
+            for( ::std::size_t i=1, len=maDiscreteTimes.size(); i<len; ++i )
+            {
+                if( maDiscreteTimes[i] < 0.0 ||
+                    maDiscreteTimes[i] > 1.0 ||
+                    maDiscreteTimes[i-1] < 0.0 ||
+                    maDiscreteTimes[i-1] > 1.0 )
+                {
+                    ENSURE_OR_THROW( false, "DiscreteActivityBase::DiscreteActivityBase(): time values not within [0,1] range!" );
+                }
+
+                if( maDiscreteTimes[i-1] > maDiscreteTimes[i] )
+                    ENSURE_OR_THROW( false, "DiscreteActivityBase::DiscreteActivityBase(): time vector is not sorted in ascending order!" );
+            }
+
+            // TODO(E2): check this also in production code?
+#endif
+        }
+
+        void DiscreteActivityBase::startAnimation()
+        {
+            // start timer on wakeup event
+            mpWakeupEvent->start();
+        }
+
+        sal_uInt32 DiscreteActivityBase::calcFrameIndex( sal_uInt32     nCurrCalls,
+                                                         ::std::size_t  nVectorSize ) const
+        {
+            if( isAutoReverse() )
+            {
+                // every full repeat run consists of one
+                // forward and one backward traversal.
+                sal_uInt32 nFrameIndex( nCurrCalls % (2*nVectorSize) );
+
+                // nFrameIndex values >= nVectorSize belong to
+                // the backward traversal
+                if( nFrameIndex >= nVectorSize )
+                    nFrameIndex = 2*nVectorSize - nFrameIndex; // invert sweep
+
+                return nFrameIndex;
+            }
+            else
+            {
+                return nCurrCalls % nVectorSize ;
+            }
+        }
+
+        sal_uInt32 DiscreteActivityBase::calcRepeatCount( sal_uInt32    nCurrCalls,
+                                                          ::std::size_t nVectorSize ) const
+        {
+            if( isAutoReverse() )
+                return nCurrCalls / (2*nVectorSize); // we've got 2 cycles per repeat
+            else
+                return nCurrCalls / nVectorSize;
+        }
+
+        bool DiscreteActivityBase::perform()
+        {
+            // call base class, for start() calls and end handling
+            if( !ActivityBase::perform() )
+                return false; // done, we're ended
+
+            const ::std::size_t nVectorSize( maDiscreteTimes.size() );
+
+            // actually perform something
+            // ==========================
+
+            // TODO(Q3): Refactor this mess
+
+            // call derived class with current frame index (modulo
+            // vector size, to cope with repeats)
+            perform( calcFrameIndex( mnCurrPerformCalls, nVectorSize ),
+                     calcRepeatCount( mnCurrPerformCalls, nVectorSize ) );
+
+            // calc next index
+            ++mnCurrPerformCalls;
+
+            // calc currently reached repeat count
+            double nCurrRepeat( double(mnCurrPerformCalls) / nVectorSize );
+
+            // if auto-reverse is specified, halve the
+            // effective repeat count, since we pass every
+            // repeat run twice: once forward, once backward.
+            if( isAutoReverse() )
+                nCurrRepeat /= 2.0;
+
+            // schedule next frame, if either repeat is indefinite
+            // (repeat forever), or we've not yet reached the requested
+            // repeat count
+            if( !isRepeatCountValid() ||
+                nCurrRepeat < getRepeatCount() )
+            {
+                // add wake-up event to queue (modulo
+                // vector size, to cope with repeats).
+
+                // repeat is handled locally, only apply acceleration/deceleration.
+                // Scale time vector with simple duration, offset with full repeat
+                // times.
+
+                // Somewhat condensed, the argument for setNextTimeout below could
+                // be written as
+
+                // mnSimpleDuration*(nFullRepeats + calcAcceleratedTime( currentRepeatTime )),
+
+                // with currentRepeatTime = maDiscreteTimes[ currentRepeatIndex ]
+
+                // Note that calcAcceleratedTime() is only applied to the current repeat's value,
+                // not to the total resulting time. This is in accordance with the SMIL spec.
+
+                mpWakeupEvent->setNextTimeout(
+                    mnSimpleDuration*(
+                        calcRepeatCount(
+                            mnCurrPerformCalls,
+                            nVectorSize ) +
+                        calcAcceleratedTime(
+                            maDiscreteTimes[
+                                calcFrameIndex(
+                                    mnCurrPerformCalls,
+                                    nVectorSize ) ] ) ) );
+
+                getEventQueue().addEvent( mpWakeupEvent );
+            }
+            else
+            {
+                // release event reference (relation to wakeup event
+                // is circular!)
+                mpWakeupEvent.reset();
+
+                // done with this activity
+                endActivity();
+            }
+
+            return false; // remove from queue, will be added back by the wakeup event.
+        }
+
+        void DiscreteActivityBase::dispose()
+        {
+            // dispose event
+            if( mpWakeupEvent )
+                mpWakeupEvent->dispose();
+
+            // release references
+            mpWakeupEvent.reset();
+
+            ActivityBase::dispose();
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */