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1 /* |
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2 * Copyright (c) 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: |
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15 * |
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16 */ |
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17 #ifndef CDLSFILES |
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18 #define CDLSFILES |
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19 |
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20 #include <CdlDllWatcher.h> |
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21 |
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22 /** |
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23 * A collection of CDir objects. |
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24 */ |
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25 class CCdlDirs : public CArrayPtrFlat<CDir> |
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26 { |
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27 public: |
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28 CCdlDirs(); |
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29 ~CCdlDirs(); |
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30 }; |
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31 |
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32 /** |
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33 * Mixin interface for objects that want to observe activity in the file system watcher |
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34 */ |
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35 class MFsWatcherObserver |
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36 { |
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37 public: |
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38 virtual void NewDirsList(CCdlDirs* aNewDirs) = 0; |
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39 }; |
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40 |
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41 /** |
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42 * The file system watcher active object. |
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43 * This watches the ?:\system\cdl directories for changes in the available CDL DLLs. |
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44 */ |
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45 class CFsWatcher : public CActive |
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46 { |
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47 public: |
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48 CFsWatcher(RFs& aFs, MFsWatcherObserver& aObserver); |
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49 ~CFsWatcher(); |
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50 void ConstructL(); |
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51 |
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52 CCdlDirs* CreateDirsListL() const; |
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53 |
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54 private: |
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55 void DoCancel(); |
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56 void RunL(); |
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57 void DoRunL(); |
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58 void Queue(); |
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59 |
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60 private: |
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61 RFs& iFs; |
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62 MFsWatcherObserver& iObserver; |
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63 }; |
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64 |
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65 |
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66 /** |
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67 * Self driven active object that maintains a list of the currently available CDL DLLs. |
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68 * It trickles changes in this set of DLLs to it's observer. This is done one DLL at a time |
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69 * to avoid hanging up the server on a long running scan of all CDL DLLs. |
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70 */ |
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71 class CCdlDllsWatcher : public CCdlDllsWatcherBase, MFsWatcherObserver |
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72 { |
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73 public: |
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74 CCdlDllsWatcher(RFs& aFs, MCdlDllsObserver* aObserver); |
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75 ~CCdlDllsWatcher(); |
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76 void ConstructL(); |
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77 |
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78 private: // from CActive |
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79 void DoCancel(); |
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80 void RunL(); |
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81 |
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82 private: // from MFsWatcherObserver |
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83 void NewDirsList(CCdlDirs* aNewDirs); |
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84 |
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85 private: |
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86 void DoRunL(); |
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87 void Queue(); |
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88 |
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89 void StartTellingObserverIfNecessaryL(); |
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90 void AddNewToObserverL(); |
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91 void RemoveCurrentFromObserverL(); |
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92 |
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93 private: // from CCdlDllsWatcherBase |
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94 TInt IsPluginInRom(const TDesC& aFileName, TBool& aIsInRom) const; |
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95 |
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96 private: |
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97 class TDllList |
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98 { |
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99 public: |
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100 // List functions. |
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101 // These functions iterate all the DLLs in name order. |
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102 // Drive order is ignored, except when the same name appears in more |
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103 // than one drive, when CDL drive priority rules are observed. |
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104 void Reset(); |
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105 const TEntry& Current() const; |
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106 TBool AtEnd() const; |
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107 void Next(); |
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108 |
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109 // Current entry comparison operators. |
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110 // These compare the current entry for two DLL lists by name then |
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111 // date modified. |
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112 TBool operator==(const TDllList& aRhs) const; |
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113 TBool operator<(const TDllList& aRhs) const; |
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114 |
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115 private: |
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116 void SetCurrent(); |
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117 |
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118 public: |
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119 CCdlDirs* iDirs; // not owned |
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120 TInt iIndices[KMaxDrives]; |
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121 const TEntry* iCurrent; |
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122 }; |
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123 |
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124 TDllList iCurrent; // .iDirs is owned |
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125 TDllList iNew; // .iDirs is owned |
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126 CCdlDirs* iNext; // owned, temporary storage for new dirs list while processing on-going |
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127 TBool iTellingObserver; |
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128 MCdlDllsObserver* iObserver; |
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129 CFsWatcher* iFsWatcher; // owned |
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130 }; |
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131 |
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132 #endif |