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1 /* |
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2 * Copyright (c) 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: Software Installer plug-in usb handler |
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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 // INCLUDE FILES |
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20 |
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21 #include "chswiusbhandler.h" |
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22 #include "chswiplugin.h" |
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23 #include "chswimassmodeobserver.h" |
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24 #include <DriveInfo.h> |
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25 |
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26 // CONSTANTS |
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27 const TInt KCallBackDelay = 5000000; |
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28 |
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29 // ---------------------------------------------------------------------------- |
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30 // CCHSwiUsbHandler::NewL() |
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31 // two-phase constructor |
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32 // ---------------------------------------------------------------------------- |
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33 // |
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34 CCHSwiUsbHandler* CCHSwiUsbHandler::NewL( |
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35 MCHSwiMassModeObserver* aMassModeObserver, |
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36 RFs& aFs ) |
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37 { |
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38 CCHSwiUsbHandler* self = |
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39 new(ELeave) CCHSwiUsbHandler( aMassModeObserver, aFs ); |
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40 CleanupStack::PushL( self ); |
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41 self->ConstructL(); |
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42 CleanupStack::Pop( self ); |
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43 return self; |
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44 } |
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45 |
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46 // ---------------------------------------------------------------------------- |
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47 // CCHSwiUsbHandler::CCHSwiUsbHandler() |
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48 // C++ default constructor |
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49 // ---------------------------------------------------------------------------- |
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50 // |
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51 CCHSwiUsbHandler::CCHSwiUsbHandler( MCHSwiMassModeObserver* aMassModeObserver, |
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52 RFs& aFs ) |
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53 : CActive( CActive::EPriorityUserInput ), |
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54 iLastDriveScanError( KErrNone ), |
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55 iMassModeObserver( aMassModeObserver ), |
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56 iFs( aFs ), |
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57 iDriveFlags( 0 ) |
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58 { |
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59 CActiveScheduler::Add( this ); |
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60 } |
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61 |
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62 // ---------------------------------------------------------------------------- |
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63 // CCHSwiUsbHandler::ConstructL() |
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64 // Symbian default constructor |
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65 // ---------------------------------------------------------------------------- |
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66 // |
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67 void CCHSwiUsbHandler::ConstructL() |
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68 { |
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69 User::LeaveIfError( iTimer.CreateLocal() ); |
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70 |
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71 iLastDriveScanError = ScanDrivesAndUpdateFlag( EFalse ); |
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72 |
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73 if ( iLastDriveScanError != KErrNone ) |
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74 { |
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75 HandleDriveError(); |
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76 } |
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77 } |
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78 |
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79 // ---------------------------------------------------------------------------- |
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80 // CCHSwiUsbHandler::~CCHSwiUsbHandler() |
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81 // destructor |
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82 // ---------------------------------------------------------------------------- |
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83 // |
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84 CCHSwiUsbHandler::~CCHSwiUsbHandler() |
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85 { |
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86 Cancel(); |
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87 iTimer.Close(); |
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88 } |
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89 |
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90 // ---------------------------------------------------------------------------- |
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91 // CCHSwiUsbHandler::SynchronousDriveScan() |
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92 // Performs synchronous drive scan. Checks whether Mass Drive is available |
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93 // and updates the flag in observer. |
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94 // ---------------------------------------------------------------------------- |
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95 // |
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96 void CCHSwiUsbHandler::SynchronousDriveScan() |
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97 { |
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98 iLastDriveScanError = ScanDrivesAndUpdateFlag( iLastDriveScanError == KErrNone ); |
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99 |
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100 if ( iLastDriveScanError != KErrNone ) |
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101 { |
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102 HandleDriveError(); |
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103 } |
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104 } |
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105 |
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106 // ---------------------------------------------------------------------------- |
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107 // CCHSwiUsbHandler::PostponedDriveScan() |
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108 // Starts postponed drive scan. |
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109 // ---------------------------------------------------------------------------- |
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110 // |
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111 void CCHSwiUsbHandler::PostponedDriveScan() |
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112 { |
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113 Cancel(); |
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114 iTimer.After( iStatus, KCallBackDelay ); |
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115 SetActive(); |
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116 } |
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117 |
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118 // ---------------------------------------------------------------------------- |
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119 // CCHSwiUsbHandler::RunL() |
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120 // Handles postponed drive scan. |
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121 // Executed either after call to PostponedDriveScan or in case of drive reading |
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122 // errors in SynchronousDriveScan or ConstructL. |
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123 // ---------------------------------------------------------------------------- |
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124 // |
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125 void CCHSwiUsbHandler::RunL() |
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126 { |
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127 TBool massModeBeforeScan = iMassModeObserver->IsMassStorageMode(); |
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128 TInt errorBeforeScan = iLastDriveScanError; |
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129 |
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130 SynchronousDriveScan(); |
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131 |
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132 if ( iLastDriveScanError == KErrNone ) |
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133 { |
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134 iMassModeObserver->HandleSuccessfulAsynchDriveScan(); |
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135 |
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136 // CCHSwiUsbObserver can't detect app uninstall when app had been installed on removable |
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137 // memory card, the memory card was removed during mass mode, and then mass |
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138 // mode was deactivated. |
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139 // Additionaly, we need to update widgets when recovering from error. |
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140 if ( !iMassModeObserver->IsMassStorageMode() && |
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141 ( massModeBeforeScan || errorBeforeScan != KErrNone ) ) |
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142 { |
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143 iMassModeObserver->HandleMassStorageModeEndEvent(); |
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144 } |
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145 } |
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146 } |
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147 |
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148 // ---------------------------------------------------------------------------- |
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149 // CCHSwiUsbHandler::HandleDriveError() |
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150 // Handles drive access errors by launching new postponed scan. |
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151 // ---------------------------------------------------------------------------- |
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152 void CCHSwiUsbHandler::HandleDriveError() |
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153 { |
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154 Cancel(); |
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155 iMassModeObserver->SetMassStorageMode( ETrue ); |
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156 |
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157 iTimer.After( iStatus, KCallBackDelay ); |
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158 SetActive(); |
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159 } |
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160 |
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161 // ---------------------------------------------------------------------------- |
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162 // CCHSwiUsbHandler::ScanDrivesAndUpdateFlag() |
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163 // Scans drives and updates Mass Mode flag in the observer. |
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164 // ---------------------------------------------------------------------------- |
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165 TInt CCHSwiUsbHandler::ScanDrivesAndUpdateFlag( TBool aFlagsValid ) |
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166 { |
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167 TInt error( KErrNone ); |
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168 |
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169 if( aFlagsValid ) |
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170 { |
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171 // iDriveFlags is valid, we can use deltaDriveFlags to avoid |
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172 // unnecessary calls to DriveInfo::GetDriveStatus |
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173 TInt driveFlags = 0; |
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174 TInt deltaDriveFlags = 0; |
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175 |
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176 error = ScanDrives( driveFlags ); |
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177 |
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178 if ( error == KErrNone ) |
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179 { |
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180 deltaDriveFlags = iDriveFlags ^ driveFlags; |
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181 iDriveFlags = driveFlags; |
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182 } |
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183 |
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184 if ( deltaDriveFlags ) |
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185 { |
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186 error = UpdateMassModeFlag(); |
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187 } |
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188 } |
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189 else |
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190 { |
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191 error = ScanDrives( iDriveFlags ); |
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192 |
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193 if ( error == KErrNone ) |
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194 { |
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195 error = UpdateMassModeFlag(); |
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196 } |
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197 } |
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198 |
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199 return error; |
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200 } |
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201 |
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202 // ---------------------------------------------------------------------------- |
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203 // CCHSwiUsbHandler::UpdateMassModeFlag() |
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204 // Updates Mass Mode flag in the observer. |
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205 // ---------------------------------------------------------------------------- |
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206 TInt CCHSwiUsbHandler::UpdateMassModeFlag() |
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207 { |
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208 TInt flags = iDriveFlags; |
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209 TBool massMemoryPresent = EFalse; |
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210 |
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211 for( TInt DriveNo = EDriveA + 1 ; DriveNo <= EDriveY; DriveNo++ ) |
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212 { |
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213 flags = flags >> 1; |
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214 if( flags & 01 ) |
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215 { |
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216 TUint status( 0 ); |
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217 TInt error = DriveInfo::GetDriveStatus( iFs, DriveNo, status ); |
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218 |
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219 if( error != KErrNone ) |
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220 { |
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221 return error; |
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222 } |
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223 |
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224 if( ( status & DriveInfo::EDriveExternallyMountable ) |
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225 && ( status & DriveInfo::EDriveInternal ) ) |
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226 { |
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227 // Internal Memory |
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228 massMemoryPresent = ETrue; |
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229 break; |
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230 } |
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231 } |
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232 } |
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233 |
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234 iMassModeObserver->SetMassStorageMode( !massMemoryPresent ); |
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235 return KErrNone; |
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236 } |
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237 |
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238 // ---------------------------------------------------------------------------- |
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239 // CCHSwiUsbHandler::RunError() |
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240 // Ignore errors from RunL. |
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241 // ---------------------------------------------------------------------------- |
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242 // |
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243 TInt CCHSwiUsbHandler::RunError( TInt /* aError */ ) |
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244 { |
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245 return KErrNone; // indicates error was handled |
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246 } |
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247 |
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248 // ---------------------------------------------------------------------------- |
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249 // CCHSwiUsbHandler::DoCancel() |
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250 // Cancel the MMC event handler |
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251 // ---------------------------------------------------------------------------- |
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252 void CCHSwiUsbHandler::DoCancel() |
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253 { |
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254 iTimer.Cancel(); |
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255 } |
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256 |
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257 // ---------------------------------------------------------------------------- |
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258 // CCHSwiUsbHandler::ScanDrives( TInt& aDriveFlags ) |
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259 // Scans drives and records a bit flag for those that exist and are |
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260 // suitable for installing widgets to. |
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261 // ---------------------------------------------------------------------------- |
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262 // |
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263 TInt CCHSwiUsbHandler::ScanDrives( TInt& aDriveFlags ) |
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264 { |
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265 // List all drives in the system |
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266 TDriveList driveList; |
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267 TInt error = iFs.DriveList( driveList ); |
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268 |
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269 if ( KErrNone == error ) |
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270 { |
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271 for ( TInt driveNumber = EDriveY; |
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272 driveNumber >= EDriveA; |
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273 driveNumber-- ) |
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274 { |
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275 // The drives that will be filtered out are the same ones that |
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276 // WidgetInstaller filters out in CWidgetUIHandler::SelectDriveL() |
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277 if ( (EDriveD == driveNumber) |
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278 || !driveList[driveNumber] ) |
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279 { |
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280 // EDriveD is a temporary drive usually a RAM disk |
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281 continue; |
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282 } |
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283 |
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284 TVolumeInfo volInfo; |
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285 if ( iFs.Volume( volInfo, driveNumber ) != KErrNone ) |
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286 { |
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287 // volume is not usable (e.g. no media card inserted) |
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288 continue; |
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289 } |
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290 if ( (volInfo.iDrive.iType == EMediaNotPresent) || |
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291 (volInfo.iDrive.iType == EMediaRom) || |
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292 (volInfo.iDrive.iType == EMediaRemote) || |
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293 (volInfo.iDrive.iDriveAtt & KDriveAttRom) || |
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294 (volInfo.iDrive.iDriveAtt & KDriveAttSubsted) ) |
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295 { |
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296 // not a suitable widget install drive |
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297 continue; |
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298 } |
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299 |
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300 // found a usable drive |
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301 aDriveFlags |= (1 << driveNumber); |
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302 } |
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303 } |
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304 |
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305 return error; |
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306 } |
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307 |