blob: eaeed4dbee49b2f178d28e70050647926eccf3de (
plain)
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
|
/* -*- 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 <svl/SfxBroadcaster.hxx>
#include <svl/hint.hxx>
#include <svl/smplhint.hxx>
#include <svl/lstner.hxx>
#include <tools/debug.hxx>
#include <algorithm>
#include <cassert>
#include <vector>
typedef std::vector<SfxListener*> SfxListenerArr_Impl;
struct SfxBroadcaster::Impl
{
/** Contains the positions of removed listeners. */
std::vector<size_t> m_RemovedPositions;
SfxListenerArr_Impl m_Listeners;
};
// broadcast immediately
void SfxBroadcaster::Broadcast( const SfxHint &rHint )
{
// notify all registered listeners exactly once
for (size_t i = 0; i < mpImpl->m_Listeners.size(); ++i)
{
SfxListener *const pListener = mpImpl->m_Listeners[i];
if (pListener)
pListener->Notify( *this, rHint );
}
}
// unregister all listeners
SfxBroadcaster::~SfxBroadcaster()
{
Broadcast( SfxSimpleHint(SFX_HINT_DYING) );
// remove all still registered listeners
for (size_t i = 0; i < mpImpl->m_Listeners.size(); ++i)
{
SfxListener *const pListener = mpImpl->m_Listeners[i];
if (pListener)
pListener->RemoveBroadcaster_Impl(*this);
}
}
// simple ctor of class SfxBroadcaster
SfxBroadcaster::SfxBroadcaster() : mpImpl(new Impl)
{
}
// copy ctor of class SfxBroadcaster
SfxBroadcaster::SfxBroadcaster( const SfxBroadcaster &rBC ) : mpImpl(new Impl)
{
for (size_t i = 0; i < rBC.mpImpl->m_Listeners.size(); ++i)
{
SfxListener *const pListener = rBC.mpImpl->m_Listeners[i];
if (pListener)
pListener->StartListening( *this );
}
}
// add a new SfxListener to the list
void SfxBroadcaster::AddListener( SfxListener& rListener )
{
DBG_TESTSOLARMUTEX();
if (mpImpl->m_RemovedPositions.empty())
{
mpImpl->m_Listeners.push_back(&rListener);
}
else
{
size_t targetPosition = mpImpl->m_RemovedPositions.back();
mpImpl->m_RemovedPositions.pop_back();
assert(mpImpl->m_Listeners[targetPosition] == nullptr);
mpImpl->m_Listeners[targetPosition] = &rListener;
}
}
// forward a notification to all registered listeners
void SfxBroadcaster::Forward(SfxBroadcaster& rBC, const SfxHint& rHint)
{
for (size_t i = 0; i < mpImpl->m_Listeners.size(); ++i)
{
SfxListener *const pListener = mpImpl->m_Listeners[i];
if (pListener)
pListener->Notify( rBC, rHint );
}
}
// remove one SfxListener from the list
void SfxBroadcaster::RemoveListener( SfxListener& rListener )
{
DBG_TESTSOLARMUTEX();
SfxListenerArr_Impl::iterator aIter = std::find(
mpImpl->m_Listeners.begin(), mpImpl->m_Listeners.end(), &rListener);
assert(aIter != mpImpl->m_Listeners.end()); // "RemoveListener: Listener unknown"
// DO NOT erase the listener, set the pointer to 0
// because the current continuation may contain this->Broadcast
*aIter = nullptr;
size_t positionOfRemovedElement = std::distance(mpImpl->m_Listeners.begin(), aIter);
mpImpl->m_RemovedPositions.push_back(positionOfRemovedElement);
}
bool SfxBroadcaster::HasListeners() const
{
return (GetListenerCount() != 0);
}
size_t SfxBroadcaster::GetListenerCount() const
{
assert(mpImpl->m_Listeners.size() >= mpImpl->m_RemovedPositions.size());
return mpImpl->m_Listeners.size() - mpImpl->m_RemovedPositions.size();
}
size_t SfxBroadcaster::GetSizeOfVector() const
{
return mpImpl->m_Listeners.size();
}
SfxListener* SfxBroadcaster::GetListener( size_t nNo ) const
{
return mpImpl->m_Listeners[nNo];
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
