Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

1 files changed, 234 insertions, 0 deletions

diff --git a/slideshow/source/engine/activities/activitybase.cxx b/slideshow/source/engine/activities/activitybase.cxx
new file mode 100644
index 000000000..82a117f8a
--- /dev/null
+++ b/slideshow/source/engine/activities/activitybase.cxx
@@ -0,0 +1,234 @@
+/* -*- 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 <sal/config.h>
+
+#include <algorithm>
+
+#include <tools/diagnose_ex.h>
+
+#include "activitybase.hxx"
+
+
+namespace slideshow::internal
+{
+        // TODO(P1): Elide some virtual function calls, by templifying this
+        // static hierarchy
+
+        ActivityBase::ActivityBase( const ActivityParameters& rParms ) :
+            mpEndEvent( rParms.mrEndEvent ),
+            mrEventQueue( rParms.mrEventQueue ),
+            mpShape(),
+            mpAttributeLayer(),
+            maRepeats( rParms.mrRepeats ),
+            mnAccelerationFraction( rParms.mnAccelerationFraction ),
+            mnDecelerationFraction( rParms.mnDecelerationFraction ),
+            mbAutoReverse( rParms.mbAutoReverse ),
+            mbFirstPerformCall( true ),
+            mbIsActive( true ) {}
+
+        void ActivityBase::dispose()
+        {
+            // deactivate
+            mbIsActive = false;
+
+            // dispose event
+            if( mpEndEvent )
+                mpEndEvent->dispose();
+
+            // release references
+            mpEndEvent.reset();
+            mpShape.reset();
+            mpAttributeLayer.reset();
+        }
+
+        double ActivityBase::calcTimeLag() const
+        {
+            // TODO(Q1): implement different init process!
+            if (isActive() && mbFirstPerformCall)
+            {
+                mbFirstPerformCall = false;
+
+                // notify derived classes that we're
+                // starting now
+                const_cast<ActivityBase *>(this)->startAnimation();
+            }
+            return 0.0;
+        }
+
+        bool ActivityBase::perform()
+        {
+            // still active?
+            if( !isActive() )
+                return false; // no, early exit.
+
+            OSL_ASSERT( ! mbFirstPerformCall );
+
+            return true;
+        }
+
+        bool ActivityBase::isActive() const
+        {
+            return mbIsActive;
+        }
+
+        void ActivityBase::setTargets( const AnimatableShapeSharedPtr&      rShape,
+                                       const ShapeAttributeLayerSharedPtr&  rAttrLayer )
+        {
+            ENSURE_OR_THROW( rShape,
+                              "ActivityBase::setTargets(): Invalid shape" );
+            ENSURE_OR_THROW( rAttrLayer,
+                              "ActivityBase::setTargets(): Invalid attribute layer" );
+
+            mpShape = rShape;
+            mpAttributeLayer = rAttrLayer;
+        }
+
+        void ActivityBase::endActivity()
+        {
+            // this is a regular activity end
+            mbIsActive = false;
+
+            // Activity is ending, queue event, then
+            if( mpEndEvent )
+                mrEventQueue.addEvent( mpEndEvent );
+
+            // release references
+            mpEndEvent.reset();
+        }
+
+        void ActivityBase::dequeued()
+        {
+            // xxx todo:
+//             // ignored here, if we're still active. Discrete
+//             // activities are dequeued after every perform() call,
+//             // thus, the call is only significant when isActive() ==
+//             // false.
+            if( !isActive() )
+                endAnimation();
+        }
+
+        void ActivityBase::end()
+        {
+            if (!isActive() || isDisposed())
+                return;
+            // assure animation is started:
+            if (mbFirstPerformCall) {
+                mbFirstPerformCall = false;
+                // notify derived classes that we're starting now
+                startAnimation();
+            }
+
+            performEnd(); // calling private virtual
+            endAnimation();
+            endActivity();
+        }
+
+        double ActivityBase::calcAcceleratedTime( double nT ) const
+        {
+            // Handle acceleration/deceleration
+            // ================================
+
+            // clamp nT to permissible [0,1] range
+            nT = std::clamp( nT, 0.0, 1.0 );
+
+            // take acceleration/deceleration into account. if the sum
+            // of mnAccelerationFraction and mnDecelerationFraction
+            // exceeds 1.0, ignore both (that's according to SMIL spec)
+            if( (mnAccelerationFraction > 0.0 ||
+                 mnDecelerationFraction > 0.0) &&
+                mnAccelerationFraction + mnDecelerationFraction <= 1.0 )
+            {
+                /*
+                // calc accelerated/decelerated time.
+
+                // We have three intervals:
+                // 1 [0,a]
+                // 2 [a,d]
+                // 3 [d,1] (with a and d being acceleration/deceleration
+                // fraction, resp.)
+
+                // The change rate during interval 1 is constantly
+                // increasing, reaching 1 at a. It then stays at 1,
+                // starting a linear decrease at d, ending with 0 at
+                // time 1. The integral of this function is the
+                // required new time nT'.
+
+                // As we arbitrarily assumed 1 as the upper value of
+                // the change rate, the integral must be normalized to
+                // reach nT'=1 at the end of the interval. This
+                // normalization constant is:
+
+                // c = 1 - 0.5a - 0.5d
+
+                // The integral itself then amounts to:
+
+                // 0.5 nT^2 / a + (nT-a) + (nT - 0.5 nT^2 / d)
+
+                // (where each of the three summands correspond to the
+                // three intervals above, and are applied only if nT
+                // has reached the corresponding interval)
+
+                // The graph of the change rate is a trapezoid:
+
+                //   |
+                //  1|      /--------------\
+                //   |     /                \
+                //   |    /                  \
+                //   |   /                    \
+                //   -----------------------------
+                //      0   a              d  1
+
+                //*/
+                const double nC( 1.0 - 0.5*mnAccelerationFraction - 0.5*mnDecelerationFraction );
+
+                // this variable accumulates the new time value
+                double nTPrime(0.0);
+
+                if( nT < mnAccelerationFraction )
+                {
+                    nTPrime += 0.5*nT*nT/mnAccelerationFraction; // partial first interval
+                }
+                else
+                {
+                    nTPrime += 0.5*mnAccelerationFraction; // full first interval
+
+                    if( nT <= 1.0-mnDecelerationFraction )
+                    {
+                        nTPrime += nT-mnAccelerationFraction; // partial second interval
+                    }
+                    else
+                    {
+                        nTPrime += 1.0 - mnAccelerationFraction - mnDecelerationFraction; // full second interval
+
+                        const double nTRelative( nT - 1.0 + mnDecelerationFraction );
+
+                        nTPrime += nTRelative - 0.5*nTRelative*nTRelative / mnDecelerationFraction;
+                    }
+                }
+
+                // normalize, and assign to work variable
+                nT = nTPrime / nC;
+            }
+
+            return nT;
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */