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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : // must be first
22 : #include <canvas/debug.hxx>
23 : #include <canvas/verbosetrace.hxx>
24 :
25 : #include <comphelper/anytostring.hxx>
26 : #include <cppuhelper/exc_hlp.hxx>
27 :
28 : #include "slideshowexceptions.hxx"
29 : #include "activity.hxx"
30 : #include "activitiesqueue.hxx"
31 :
32 : #include <boost/mem_fn.hpp>
33 : #include <boost/shared_ptr.hpp>
34 : #include <algorithm>
35 :
36 :
37 : using namespace ::com::sun::star;
38 :
39 : namespace slideshow
40 : {
41 : namespace internal
42 : {
43 2 : ActivitiesQueue::ActivitiesQueue(
44 : const ::boost::shared_ptr< ::canvas::tools::ElapsedTime >& pPresTimer ) :
45 : mpTimer( pPresTimer ),
46 : maCurrentActivitiesWaiting(),
47 : maCurrentActivitiesReinsert(),
48 2 : maDequeuedActivities()
49 : {
50 2 : }
51 :
52 4 : ActivitiesQueue::~ActivitiesQueue()
53 : {
54 : // dispose all queue entries
55 : try
56 : {
57 : std::for_each( maCurrentActivitiesWaiting.begin(),
58 : maCurrentActivitiesWaiting.end(),
59 2 : boost::mem_fn( &Disposable::dispose ) );
60 : std::for_each( maCurrentActivitiesReinsert.begin(),
61 : maCurrentActivitiesReinsert.end(),
62 2 : boost::mem_fn( &Disposable::dispose ) );
63 : }
64 0 : catch (uno::Exception &)
65 : {
66 : OSL_FAIL( OUStringToOString(
67 : comphelper::anyToString(
68 : cppu::getCaughtException() ),
69 : RTL_TEXTENCODING_UTF8 ).getStr() );
70 : }
71 2 : }
72 :
73 0 : bool ActivitiesQueue::addActivity( const ActivitySharedPtr& pActivity )
74 : {
75 : OSL_ENSURE( pActivity, "ActivitiesQueue::addActivity: activity ptr NULL" );
76 :
77 0 : if( !pActivity )
78 0 : return false;
79 :
80 : // add entry to waiting list
81 0 : maCurrentActivitiesWaiting.push_back( pActivity );
82 :
83 0 : return true;
84 : }
85 :
86 0 : void ActivitiesQueue::process()
87 : {
88 : VERBOSE_TRACE( "ActivitiesQueue: outer loop heartbeat" );
89 :
90 : // accumulate time lag for all activities, and lag time
91 : // base if necessary:
92 : ActivityQueue::const_iterator iPos(
93 0 : maCurrentActivitiesWaiting.begin() );
94 : const ActivityQueue::const_iterator iEnd(
95 0 : maCurrentActivitiesWaiting.end() );
96 0 : double fLag = 0.0;
97 0 : for ( ; iPos != iEnd; ++iPos )
98 0 : fLag = std::max<double>( fLag, (*iPos)->calcTimeLag() );
99 0 : if (fLag > 0.0)
100 : {
101 0 : mpTimer->adjustTimer( -fLag );
102 : }
103 :
104 : // process list of activities
105 0 : while( !maCurrentActivitiesWaiting.empty() )
106 : {
107 : // process topmost activity
108 0 : ActivitySharedPtr pActivity( maCurrentActivitiesWaiting.front() );
109 0 : maCurrentActivitiesWaiting.pop_front();
110 :
111 0 : bool bReinsert( false );
112 :
113 : try
114 : {
115 : // fire up activity
116 0 : bReinsert = pActivity->perform();
117 : }
118 0 : catch( uno::RuntimeException& )
119 : {
120 0 : throw;
121 : }
122 0 : catch( uno::Exception& )
123 : {
124 : // catch anything here, we don't want
125 : // to leave this scope under _any_
126 : // circumstance. Although, do _not_
127 : // reinsert an activity that threw
128 : // once.
129 :
130 : // NOTE: we explicitly don't catch(...) here,
131 : // since this will also capture segmentation
132 : // violations and the like. In such a case, we
133 : // still better let our clients now...
134 : OSL_FAIL( OUStringToOString(
135 : comphelper::anyToString( cppu::getCaughtException() ),
136 : RTL_TEXTENCODING_UTF8 ).getStr() );
137 : }
138 0 : catch( SlideShowException& )
139 : {
140 : // catch anything here, we don't want
141 : // to leave this scope under _any_
142 : // circumstance. Although, do _not_
143 : // reinsert an activity that threw
144 : // once.
145 :
146 : // NOTE: we explicitly don't catch(...) here,
147 : // since this will also capture segmentation
148 : // violations and the like. In such a case, we
149 : // still better let our clients now...
150 : OSL_TRACE( "::presentation::internal::ActivitiesQueue: Activity threw a SlideShowException, removing from ring" );
151 : }
152 :
153 0 : if( bReinsert )
154 0 : maCurrentActivitiesReinsert.push_back( pActivity );
155 : else
156 0 : maDequeuedActivities.push_back( pActivity );
157 :
158 : VERBOSE_TRACE( "ActivitiesQueue: inner loop heartbeat" );
159 0 : }
160 :
161 0 : if( !maCurrentActivitiesReinsert.empty() )
162 : {
163 : // reinsert all processed, but not finished
164 : // activities back to waiting queue. With swap(),
165 : // we kill two birds with one stone: we reuse the
166 : // list nodes, and we clear the
167 : // maCurrentActivitiesReinsert list
168 0 : maCurrentActivitiesWaiting.swap( maCurrentActivitiesReinsert );
169 : }
170 0 : }
171 :
172 0 : void ActivitiesQueue::processDequeued()
173 : {
174 : // notify all dequeued activities from last round
175 : ::std::for_each( maDequeuedActivities.begin(),
176 : maDequeuedActivities.end(),
177 0 : ::boost::mem_fn( &Activity::dequeued ) );
178 0 : maDequeuedActivities.clear();
179 0 : }
180 :
181 0 : bool ActivitiesQueue::isEmpty() const
182 : {
183 0 : return maCurrentActivitiesWaiting.empty() && maCurrentActivitiesReinsert.empty();
184 : }
185 :
186 2 : void ActivitiesQueue::clear()
187 : {
188 : // dequeue all entries:
189 : std::for_each( maCurrentActivitiesWaiting.begin(),
190 : maCurrentActivitiesWaiting.end(),
191 2 : boost::mem_fn( &Activity::dequeued ) );
192 2 : ActivityQueue().swap( maCurrentActivitiesWaiting );
193 :
194 : std::for_each( maCurrentActivitiesReinsert.begin(),
195 : maCurrentActivitiesReinsert.end(),
196 2 : boost::mem_fn( &Activity::dequeued ) );
197 2 : ActivityQueue().swap( maCurrentActivitiesReinsert );
198 2 : }
199 : }
200 : }
201 :
202 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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