1 /* |
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2 * Copyright (c) 2006-2007 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: Monitors BTRegistry device changes and sends the |
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15 * new status to listener |
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16 * |
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17 */ |
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18 |
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19 #include "btregistryobserver.h" |
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20 #include "debug.h" |
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21 |
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22 #include <bt_subscribe.h> |
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23 const TInt KDeviceArrayDefaultSize=10; |
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24 // --------------------------------------------------------------------- |
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25 // Constructor |
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26 // --------------------------------------------------------------------- |
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27 CBTRegistryObserver::CBTRegistryObserver(MBTRegistryObserver* aObserver, |
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28 const TBTRegistrySearch aPattern) |
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29 : CActive(CActive::EPriorityHigh), |
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30 iObserver(aObserver), iSearchPattern(aPattern) |
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31 { |
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32 TRACE_FUNC_ENTRY |
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33 CActiveScheduler::Add(this); |
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34 // The priority will be EPriorityHigh only initially. |
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35 // after the first successfull retrieval of the devicelist |
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36 // the priority will be changed to EPriorityLow. |
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37 |
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38 // This will make the 1st devicelist drawn as quickly as possible, |
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39 // but the subsequent refrehes will not decrease the responsiveness |
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40 // of the Btui. |
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41 iAnotherEventPending=EFalse; |
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42 |
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43 TRACE_FUNC_EXIT |
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44 } |
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45 // --------------------------------------------------------------------- |
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46 // CBTRegistryObserver::NewL |
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47 // --------------------------------------------------------------------- |
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48 CBTRegistryObserver* CBTRegistryObserver::NewL(MBTRegistryObserver* aObserver, |
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49 const TBTRegistrySearch aPattern) |
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50 { |
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51 CBTRegistryObserver* self = new (ELeave) CBTRegistryObserver(aObserver, aPattern); |
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52 CleanupStack::PushL(self); |
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53 self->ConstructL(); |
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54 CleanupStack::Pop(self); |
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55 return self; |
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56 } |
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57 // --------------------------------------------------------------------- |
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58 // Destructor |
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59 // --------------------------------------------------------------------- |
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60 CBTRegistryObserver::~CBTRegistryObserver() |
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61 { |
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62 TRACE_FUNC_ENTRY |
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63 Cancel(); |
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64 iProperty.Close(); |
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65 delete iDevMan; |
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66 |
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67 DeleteAllocatedDevices(); |
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68 |
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69 delete iRegDeviceArray; |
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70 iRegDeviceArray=NULL; |
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71 |
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72 TRACE_FUNC_EXIT |
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73 } |
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74 // --------------------------------------------------------------------- |
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75 // CBTRegistryObserver::ConstructL() |
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76 // --------------------------------------------------------------------- |
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77 void CBTRegistryObserver::ConstructL() |
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78 { |
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79 TRACE_FUNC_ENTRY |
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80 iRegDeviceArray = new (ELeave) CBTDeviceArray(KDeviceArrayDefaultSize); |
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81 iDevMan = CBTEngDevMan::NewL(this); |
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82 iDevMan->SetPriority(CActive::EPriorityHigh); |
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83 |
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84 iProperty.Attach(KPropertyUidBluetoothCategory, KPropertyKeyBluetoothGetRegistryTableChange); |
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85 StartIfNotRunning(); |
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86 TRACE_FUNC_EXIT |
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87 } |
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88 // --------------------------------------------------------------------- |
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89 // CBTRegistryObserver::Refresh |
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90 // This will simulate registry change event. |
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91 // --------------------------------------------------------------------- |
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92 void CBTRegistryObserver::Refresh() |
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93 { |
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94 TRACE_FUNC_ENTRY |
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95 |
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96 __ASSERT_DEBUG(iDevMan, User::Invariant()); |
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97 |
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98 if (iDevMan->IsActive()) |
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99 { |
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100 // An attempt to start a new search, during a prior |
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101 // one. |
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102 iAnotherEventPending=ETrue; |
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103 return; |
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104 } |
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105 Cancel(); |
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106 |
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107 DeleteAllocatedDevices(); |
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108 iDevMan->GetDevices(iSearchPattern, iRegDeviceArray); |
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109 |
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110 StartIfNotRunning(); |
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111 |
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112 TRACE_FUNC_EXIT |
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113 } |
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114 |
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115 // --------------------------------------------------------------------- |
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116 // CBTRegistryObserver::StartIfNotRunning |
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117 // this have to be called again each time there has been registry event |
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118 // --------------------------------------------------------------------- |
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119 void CBTRegistryObserver::StartIfNotRunning() |
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120 { |
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121 TRACE_FUNC_ENTRY |
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122 if (!IsActive()) |
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123 { |
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124 TRACE_INFO(_L("Start()")) |
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125 iIsStopped = EFalse; |
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126 iProperty.Subscribe(iStatus); |
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127 SetActive(); |
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128 } |
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129 TRACE_FUNC_EXIT |
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130 } |
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131 // --------------------------------------------------------------------- |
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132 // CBTRegistryObserver::RunL |
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133 // From CAtive |
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134 // This is called when registry has changed. This will not |
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135 // be called when BTRegistry date retrieval is complete, since |
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136 // HandleGetDevicesComplete is called when RBTregistry data retrieval |
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137 // is complete |
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138 // ---------------------------------------------------------------------- |
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139 |
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140 void CBTRegistryObserver::RunL() |
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141 { |
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142 TRACE_FUNC_ENTRY |
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143 if(iDevMan && iDevMan->IsActive()) |
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144 { |
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145 // An attempt to start a new search, during a prior |
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146 // one. We will not start a new search, but we |
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147 // will do it after the current search is complete |
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148 iAnotherEventPending=ETrue; |
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149 StartIfNotRunning(); |
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150 TRACE_FUNC_EXIT |
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151 return; |
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152 } |
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153 if(!IsActive()) |
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154 SetPriority(CActive::EPriorityLow); |
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155 |
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156 |
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157 |
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158 TInt registryTable; |
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159 iProperty.Get(registryTable); |
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160 iAnotherEventPending=EFalse; |
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161 |
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162 if(iDevMan && iStatus.Int() == KErrNone && registryTable == KRegistryChangeRemoteTable) |
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163 { |
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164 TRACE_INFO(_L("Remote table change")) |
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165 |
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166 DeleteAllocatedDevices(); |
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167 iDevMan->GetDevices(iSearchPattern, iRegDeviceArray); |
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168 } |
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169 StartIfNotRunning(); |
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170 TRACE_FUNC_EXIT |
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171 } |
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172 |
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173 // --------------------------------------------------------------------- |
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174 // CBTRegistryObserver::HandleGetDevicesComplete |
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175 // From MBTEngDevManObserver |
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176 // |
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177 // This function will not filter out refreshes with no changes, |
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178 // since the connect status may have been changed in those cases, and |
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179 // this class does not know about that |
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180 // |
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181 // It is worth to mention that CBTDeviceContainer will not refresh parts |
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182 // of the screen that are not changed. |
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183 // --------------------------------------------------------------------- |
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184 void CBTRegistryObserver::HandleGetDevicesComplete(TInt aErr, CBTDeviceArray* aDeviceArray) |
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185 { |
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186 TRACE_FUNC_ENTRY |
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187 TRACE_INFO((_L("aErr = %d"), aErr)) |
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188 |
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189 // the initial view refresh is done. We will decrese |
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190 // the priority of this component to quarantee UI |
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191 // responsiveness |
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192 if(!iDevMan->IsActive()) |
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193 iDevMan->SetPriority(CActive::EPriorityLow); |
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194 |
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195 TRAP_IGNORE( |
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196 if( aErr != KErrNotFound) |
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197 iObserver->RegistryChangedL(aDeviceArray ); |
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198 else |
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199 { |
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200 // handle the empty response case. The DevMan may issue |
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201 // NULL in that case |
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202 iObserver->RegistryChangedL(iRegDeviceArray ); |
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203 } |
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204 ); |
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205 |
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206 DeleteAllocatedDevices(); |
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207 |
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208 if(iAnotherEventPending) |
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209 { |
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210 // Current results are not sent further, since |
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211 // there has been changes, witch may have rendered the current |
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212 // results allready obsolate. Therefore a refresh is made instead |
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213 |
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214 iAnotherEventPending=EFalse; |
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215 iDevMan->GetDevices(iSearchPattern, iRegDeviceArray); |
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216 } |
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217 TRACE_FUNC_EXIT |
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218 } |
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219 |
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220 // --------------------------------------------------------------------- |
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221 // CBTRegistryObserver::DeleteAllocatedDevices |
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222 // --------------------------------------------------------------------- |
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223 void CBTRegistryObserver::DeleteAllocatedDevices() |
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224 { |
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225 TRACE_FUNC_ENTRY |
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226 if(iRegDeviceArray) |
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227 { |
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228 iRegDeviceArray->ResetAndDestroy(); |
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229 } |
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230 TRACE_FUNC_EXIT |
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231 } |
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232 // --------------------------------------------------------------------- |
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233 // CBTRegistryObserver::Cancel |
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234 // From CActive |
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235 // --------------------------------------------------------------------- |
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236 |
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237 void CBTRegistryObserver::Cancel() |
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238 { |
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239 TRACE_FUNC_ENTRY |
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240 iIsStopped = ETrue; |
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241 iAnotherEventPending=EFalse; |
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242 CActive::Cancel(); |
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243 if (iDevMan) iDevMan->Cancel(); |
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244 DeleteAllocatedDevices(); |
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245 TRACE_FUNC_EXIT |
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246 } |
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247 // --------------------------------------------------------------------- |
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248 // CBTRegistryObserver::DoCancel |
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249 // From CActive |
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250 // --------------------------------------------------------------------- |
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251 void CBTRegistryObserver::DoCancel() |
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252 { |
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253 TRACE_FUNC_ENTRY |
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254 iProperty.Cancel(); |
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255 TRACE_FUNC_EXIT |
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256 } |
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