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1 /* |
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2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Class that stores the active media list pointer |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 |
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21 #include "glxactivemedialistregistry.h" |
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22 |
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23 #include <glxtracer.h> |
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24 #include <glxpanic.h> |
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25 #include <glxsingletonstore.h> |
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26 #include <glxlog.h> |
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27 #include "mglxactivemedialistchangeobserver.h" |
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28 |
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29 // ----------------------------------------------------------------------------- |
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30 // Return an instance |
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31 // ----------------------------------------------------------------------------- |
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32 // |
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33 EXPORT_C CGlxActiveMediaListRegistry* CGlxActiveMediaListRegistry::InstanceL( |
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34 MGlxActiveMediaListChangeObserver* aObserver) |
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35 { |
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36 GLX_LOG_INFO1("CGlxActiveMediaListRegistry::InstanceL: %x", aObserver); |
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37 |
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38 CGlxActiveMediaListRegistry* obj = CGlxSingletonStore::InstanceL(&NewL); |
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39 |
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40 // Add the observer if has not already been added |
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41 if (aObserver && KErrNotFound == obj->iObservers.Find(aObserver)) |
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42 { |
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43 TRAPD(err, obj->iObservers.AppendL(aObserver)); |
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44 // Close tls reference and leave if AppendL leaves. |
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45 // Otherwise there will be one reference that will be never closed |
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46 if (KErrNone != err) |
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47 { |
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48 CGlxSingletonStore::Close(obj); |
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49 User::Leave(err); |
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50 } |
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51 } |
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52 return obj; |
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53 } |
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54 |
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55 // ----------------------------------------------------------------------------- |
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56 // Return new object |
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57 // ----------------------------------------------------------------------------- |
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58 // |
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59 CGlxActiveMediaListRegistry* CGlxActiveMediaListRegistry::NewL() |
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60 { |
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61 CGlxActiveMediaListRegistry* obj = new (ELeave) CGlxActiveMediaListRegistry(); |
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62 // (No ConstructL necessary) |
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63 return obj; |
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64 } |
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65 |
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66 // ----------------------------------------------------------------------------- |
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67 // Constructor |
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68 // ----------------------------------------------------------------------------- |
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69 // |
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70 CGlxActiveMediaListRegistry::CGlxActiveMediaListRegistry() |
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71 { |
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72 } |
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73 |
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74 // ----------------------------------------------------------------------------- |
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75 // Destructor |
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76 // ----------------------------------------------------------------------------- |
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77 // |
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78 CGlxActiveMediaListRegistry::~CGlxActiveMediaListRegistry() |
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79 { |
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80 iObservers.Close(); |
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81 } |
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82 |
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83 // ----------------------------------------------------------------------------- |
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84 // Close a reference |
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85 // ----------------------------------------------------------------------------- |
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86 // |
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87 void CGlxActiveMediaListRegistry::Close(MGlxActiveMediaListChangeObserver* aObserver) |
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88 { |
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89 TRACER("CGlxActiveMediaListRegistry::Close"); |
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90 // Remove the observer if it has been added earlier |
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91 TInt index = iObservers.Find(aObserver); |
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92 if (KErrNotFound != index) |
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93 { |
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94 iObservers.Remove(index); |
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95 } |
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96 |
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97 // Decrease reference count, and delete if last one |
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98 // May delete this object |
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99 CGlxSingletonStore::Close(this); |
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100 // Member variable access not safe after CGlxTls::Close() |
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101 } |
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102 |
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103 // ----------------------------------------------------------------------------- |
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104 // Register an active media list |
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105 // ----------------------------------------------------------------------------- |
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106 // |
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107 EXPORT_C void CGlxActiveMediaListRegistry::RegisterActiveMediaList(MGlxMediaList* aMediaList) |
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108 { |
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109 GLX_LOG_INFO1("CGlxActiveMediaListRegistry::RegisterActiveMediaList: %x", aMediaList); |
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110 // Add to registration count if the new list is the same as the existing one |
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111 if (aMediaList == iActiveMediaList) |
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112 { |
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113 __ASSERT_DEBUG(!iRegisteredTwice, Panic(EGlxPanicIllegalState)); // Cannot register three times |
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114 GLX_LOG_INFO("CGlxActiveMediaListRegistry::RegisterActiveMediaList: Media list registered twice"); |
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115 // The same media list has been registered twice |
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116 iRegisteredTwice = ETrue; |
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117 } |
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118 |
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119 // If active list has changed, pick up the new list and notify observers |
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120 if (iActiveMediaList != aMediaList) |
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121 { |
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122 GLX_LOG_INFO("CGlxActiveMediaListRegistry::RegisterActiveMediaList: Media list changed"); |
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123 // Pick up the new list |
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124 iActiveMediaList = aMediaList; |
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125 |
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126 // This is the first registration |
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127 iRegisteredTwice = EFalse; |
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128 |
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129 // Notify observers |
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130 NotifyObservers(); |
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131 } |
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132 } |
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133 |
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134 // ----------------------------------------------------------------------------- |
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135 // Deregister an active media list |
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136 // ----------------------------------------------------------------------------- |
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137 // |
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138 EXPORT_C void CGlxActiveMediaListRegistry::DeregisterActiveMediaList(MGlxMediaList* aMediaList) |
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139 { |
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140 GLX_LOG_INFO1("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: %x", aMediaList); |
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141 // Ignore deregistration if another list has already been registered |
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142 // (Another view was activated, and it registered a list) |
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143 if (aMediaList == iActiveMediaList) |
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144 { |
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145 // The list may be registered twice if the new and old view |
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146 // registered the same list. |
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147 if (iRegisteredTwice) |
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148 { |
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149 GLX_LOG_INFO("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: Remove second registration"); |
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150 // Remove second registration |
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151 iRegisteredTwice = EFalse; |
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152 } |
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153 else |
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154 { |
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155 GLX_LOG_INFO("CGlxActiveMediaListRegistry::DeregisterActiveMediaList: Setting active list to NULL"); |
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156 // No new media list has been registered and current one is being |
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157 // deregistered, so set active list to NULL |
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158 iActiveMediaList = NULL; |
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159 |
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160 // Notify observers |
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161 NotifyObservers(); |
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162 } |
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163 } |
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164 } |
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165 |
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166 // ----------------------------------------------------------------------------- |
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167 // Notify observers |
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168 // ----------------------------------------------------------------------------- |
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169 // |
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170 void CGlxActiveMediaListRegistry::NotifyObservers() |
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171 { |
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172 // Notify observers |
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173 for (TInt i = iObservers.Count() - 1; i >= 0; i--) |
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174 { |
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175 iObservers[i]->HandleActiveMediaListChanged(); |
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176 } |
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177 } |
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178 |
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179 // ----------------------------------------------------------------------------- |
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180 // Return active media list |
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181 // ----------------------------------------------------------------------------- |
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182 // |
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183 MGlxMediaList* CGlxActiveMediaListRegistry::ActiveMediaList() const |
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184 { |
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185 GLX_LOG_INFO("CGlxActiveMediaListRegistry::ActiveMediaList()"); |
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186 return iActiveMediaList; |
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187 } |