convert sdr::animation::EventList to o3tl::sorted_vector

instead of home-grown linked list

Change-Id: I7cf24692e7b9919ac83e404e2d0167c3015b97de
Reviewed-on: https://gerrit.libreoffice.org/30569Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

include/svx/sdr/animation/scheduler.hxx

@@ -23,31 +23,24 @@
 #include <sal/types.h>
 #include <vcl/timer.hxx>
 #include <svx/svxdllapi.h>
+#include <o3tl/sorted_vector.hxx>
 
 
-// event class
-
 namespace sdr
 {
     namespace animation
     {
+
         class SVX_DLLPUBLIC Event
         {
             // time of event in ms
             sal_uInt32                                      mnTime;
 
-            // pointer for linked list sorted by mnTime
-            Event*                                          mpNext;
-
         public:
             // constructor/destructor
             SAL_DLLPRIVATE explicit Event();
             virtual ~Event();
 
-            // access to mpNext
-            SAL_DLLPRIVATE Event* GetNext() const {  return mpNext; }
-            SAL_DLLPRIVATE void SetNext(Event* pNew);
-
             // get/set time
             SAL_DLLPRIVATE sal_uInt32 GetTime() const {  return mnTime; }
             void SetTime(sal_uInt32 nNew);
@@ -55,43 +48,12 @@ namespace sdr
             // execute event
             virtual void Trigger(sal_uInt32 nTime) = 0;
         };
-    } // end of namespace animation
-} // end of namespace sdr
-
 
-// eventlist class
-
-namespace sdr
-{
-    namespace animation
-    {
-        class SVX_DLLPUBLIC EventList
+        struct CompareEvent
         {
-            // pointer to first entry
-            Event*                                          mpHead;
-
-        public:
-            // constructor/destructor
-            SAL_DLLPRIVATE EventList();
-            virtual ~EventList();
-
-            // insert/remove time dependent
-            SAL_DLLPRIVATE void Insert(Event* pNew);
-            SAL_DLLPRIVATE void Remove(Event* pOld);
-
-            // get first
-            SAL_DLLPRIVATE Event* GetFirst() {  return mpHead; }
+            bool operator()(Event* const& lhs, Event* const& rhs) const;
         };
-    } // end of namespace animation
-} // end of namespace sdr
-
 
-// scheduler class
-
-namespace sdr
-{
-    namespace animation
-    {
         class SVX_DLLPUBLIC Scheduler : public Timer
         {
             // time in ms
@@ -101,7 +63,7 @@ namespace sdr
             sal_uInt32                                      mnDeltaTime;
 
             // list of events
-            EventList                                       maList;
+            o3tl::sorted_vector<Event*, CompareEvent>       maList;
 
             // Flag which remembers if this timer is paused. Default
             // is false.
@@ -135,6 +97,7 @@ namespace sdr
             SAL_DLLPRIVATE bool IsPaused() const { return mbIsPaused; }
             SAL_DLLPRIVATE void SetPaused(bool bNew);
         };
+
     } // end of namespace animation
 } // end of namespace sdr
 

svx/source/sdr/animation/scheduler.cxx

@@ -28,9 +28,7 @@ namespace sdr
 {
     namespace animation
     {
-        Event::Event()
-        :   mnTime(0),
-            mpNext(nullptr)
+        Event::Event() : mnTime(0)
         {
         }
 
@@ -39,15 +37,6 @@ namespace sdr
         }
 
 
-        void Event::SetNext(Event* pNew)
-        {
-            if(pNew != mpNext)
-            {
-                mpNext = pNew;
-            }
-        }
-
-
         void Event::SetTime(sal_uInt32 nNew)
         {
             if(mnTime != nNew)
@@ -55,93 +44,13 @@ namespace sdr
                 mnTime = nNew;
             }
         }
-    } // end of namespace animation
-} // end of namespace sdr
-
-
-// eventlist class
 
-namespace sdr
-{
-    namespace animation
-    {
-        EventList::EventList()
-        :   mpHead(nullptr)
+        bool CompareEvent::operator()(Event* const& lhs, Event* const& rhs) const
         {
+            return lhs->GetTime() < rhs->GetTime();
         }
 
-        EventList::~EventList()
-        {
-            while(mpHead)
-            {
-                Event* pNext = mpHead->GetNext();
-                mpHead->SetNext(nullptr);
-                mpHead = pNext;
-            }
-        }
-
-        void EventList::Insert(Event* pNew)
-        {
-            if(pNew)
-            {
-                Event* pCurrent = mpHead;
-                Event* pPrev = nullptr;
-
-                while(pCurrent && pCurrent->GetTime() < pNew->GetTime())
-                {
-                    pPrev = pCurrent;
-                    pCurrent = pCurrent->GetNext();
-                }
-
-                if(pPrev)
-                {
-                    pNew->SetNext(pPrev->GetNext());
-                    pPrev->SetNext(pNew);
-                }
-                else
-                {
-                    pNew->SetNext(mpHead);
-                    mpHead = pNew;
-                }
-            }
-        }
-
-        void EventList::Remove(Event* pOld)
-        {
-            if(pOld && mpHead)
-            {
-                Event* pCurrent = mpHead;
-                Event* pPrev = nullptr;
-
-                while(pCurrent && pCurrent != pOld)
-                {
-                    pPrev = pCurrent;
-                    pCurrent = pCurrent->GetNext();
-                }
-
-                if(pPrev)
-                {
-                    pPrev->SetNext(pOld->GetNext());
-                }
-                else
-                {
-                    mpHead = pOld->GetNext();
-                }
-
-                pOld->SetNext(nullptr);
-            }
-        }
-
-    } // end of namespace animation
-} // end of namespace sdr
-
-
-// scheduler class
 
-namespace sdr
-{
-    namespace animation
-    {
         Scheduler::Scheduler()
         :   mnTime(0L),
             mnDeltaTime(0L),
@@ -169,38 +78,36 @@ namespace sdr
 
         void Scheduler::triggerEvents()
         {
-            Event* pNextEvent = maList.GetFirst();
+            if (maList.empty())
+                return;
 
-            if(pNextEvent)
-            {
-                // copy events which need to be executed to a vector. Remove them from
-                // the scheduler
-                ::std::vector< Event* > EventPointerVector;
+            // copy events which need to be executed to a vector. Remove them from
+            // the scheduler
+            ::std::vector< Event* > aToBeExecutedList;
 
-                while(pNextEvent && pNextEvent->GetTime() <= mnTime)
-                {
-                    maList.Remove(pNextEvent);
-                    EventPointerVector.push_back(pNextEvent);
-                    pNextEvent = maList.GetFirst();
-                }
+            while(!maList.empty() && maList[0]->GetTime() <= mnTime)
+            {
+                Event* pNextEvent = maList.front();
+                maList.erase(maList.begin());
+                aToBeExecutedList.push_back(pNextEvent);
+            }
 
-                // execute events from the vector
-                ::std::vector< Event* >::const_iterator aEnd = EventPointerVector.end();
-                for(::std::vector< Event* >::iterator aCandidate = EventPointerVector.begin();
-                    aCandidate != aEnd; ++aCandidate)
-                {
-                    // trigger event. This may re-insert the event to the scheduler again
-                    (*aCandidate)->Trigger(mnTime);
-                }
+            // execute events from the vector
+            ::std::vector< Event* >::const_iterator aEnd = aToBeExecutedList.end();
+            for(::std::vector< Event* >::iterator aCandidate = aToBeExecutedList.begin();
+                aCandidate != aEnd; ++aCandidate)
+            {
+                // trigger event. This may re-insert the event to the scheduler again
+                (*aCandidate)->Trigger(mnTime);
             }
         }
 
         void Scheduler::checkTimeout()
         {
             // re-start or stop timer according to event list
-            if(!IsPaused() && maList.GetFirst())
+            if(!IsPaused() && !maList.empty())
             {
-                mnDeltaTime = maList.GetFirst()->GetTime() - mnTime;
+                mnDeltaTime = maList.front()->GetTime() - mnTime;
 
                 if(0L != mnDeltaTime)
                 {
@@ -222,43 +129,36 @@ namespace sdr
             Stop();
             mnTime = nTime;
 
-            // get event pointer
-            Event* pEvent = maList.GetFirst();
+            if (maList.empty())
+                return;
 
-            if(pEvent)
+            // reset event time points
+            for (auto & rEvent : maList)
             {
-                // retet event time points
-                while(pEvent)
-                {
-                    pEvent->SetTime(nTime);
-                    pEvent = pEvent->GetNext();
-                }
-
-                if(!IsPaused())
-                {
-                    // without delta time, init events by triggering them. This will invalidate
-                    // painted objects and add them to the scheduler again
-                    mnDeltaTime = 0L;
-                    triggerEvents();
-                    checkTimeout();
-                }
+                rEvent->SetTime(nTime);
             }
+
+            if(!IsPaused())
+            {
+                // without delta time, init events by triggering them. This will invalidate
+                // painted objects and add them to the scheduler again
+                mnDeltaTime = 0L;
+                triggerEvents();
+                checkTimeout();
+             }
         }
 
         void Scheduler::InsertEvent(Event* pNew)
         {
-            if(pNew)
-            {
-                maList.Insert(pNew);
-                checkTimeout();
-            }
+            maList.insert(pNew);
+            checkTimeout();
         }
 
         void Scheduler::RemoveEvent(Event* pOld)
         {
-            if(pOld && maList.GetFirst())
+            if(!maList.empty())
             {
-                maList.Remove(pOld);
+                maList.erase(maList.find(pOld));
                 checkTimeout();
             }
         }