1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
/* -*- 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 <svx/sdr/animation/scheduler.hxx>

#include <algorithm>
#include <vector>


// event class

namespace sdr::animation
{
        Event::Event() : mnTime(0)
        {
        }

        Event::~Event()
        {
        }


        void Event::SetTime(sal_uInt32 nNew)
        {
            if(mnTime != nNew)<--- Condition 'mnTime!=nNew' is redundant
            {
                mnTime = nNew;<--- Assignment 'mnTime=nNew'
            }
        }

        Scheduler::Scheduler()
        :   mnTime(0),
            mnDeltaTime(0),
            mbIsPaused(false)
        {
            SetPriority(TaskPriority::POST_PAINT);
        }

        Scheduler::~Scheduler()
        {
            Stop();
        }

        void Scheduler::Invoke()
        {
            // stop timer and add time
            Stop();
            mnTime += mnDeltaTime;

            // execute events
            triggerEvents();

            // re-start or stop timer according to event list
            checkTimeout();
        }

        void Scheduler::triggerEvents()
        {
            if (mvEvents.empty())
                return;

            // copy events which need to be executed to a vector. Remove them from
            // the scheduler
            ::std::vector< Event* > aToBeExecutedList;

            while(!mvEvents.empty() && mvEvents.front()->GetTime() <= mnTime)
            {
                Event* pNextEvent = mvEvents.front();
                mvEvents.erase(mvEvents.begin());
                aToBeExecutedList.push_back(pNextEvent);
            }

            // execute events from the vector
            for(auto& rpCandidate : aToBeExecutedList)
            {
                // trigger event. This may re-insert the event to the scheduler again
                rpCandidate->Trigger(mnTime);
            }
        }

        void Scheduler::checkTimeout()
        {
            // re-start or stop timer according to event list
            if(!IsPaused() && !mvEvents.empty())
            {
                mnDeltaTime = mvEvents.front()->GetTime() - mnTime;

                if(0 != mnDeltaTime)
                {
                    SetTimeout(mnDeltaTime);
                    Start();
                }
            }
            else
            {
                Stop();
            }
        }


        // #i38135#
        void Scheduler::SetTime(sal_uInt32 nTime)
        {
            // reset time
            Stop();
            mnTime = nTime;

            if (mvEvents.empty())
                return;

            // reset event time points
            for (auto & rEvent : mvEvents)
            {
                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 = 0;
                triggerEvents();
                checkTimeout();
             }
        }

        void Scheduler::InsertEvent(Event& rNew)
        {
            // insert maintaining time ordering
            auto it = std::find_if(mvEvents.begin(), mvEvents.end(),
                [&rNew](const Event* pEvent) { return rNew.GetTime() < pEvent->GetTime(); });
            mvEvents.insert(it, &rNew);
            checkTimeout();
        }

        void Scheduler::RemoveEvent(Event* pOld)
        {
            if(!mvEvents.empty())
            {
                mvEvents.erase(std::remove(mvEvents.begin(), mvEvents.end(), pOld), mvEvents.end());
                checkTimeout();
            }
        }

        void Scheduler::SetPaused(bool bNew)
        {
            if(bNew != mbIsPaused)
            {
                mbIsPaused = bNew;
                checkTimeout();
            }
        }

} // end of namespace

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */