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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 |
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18 |
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19 // INCLUDE FILES |
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20 #include "WriterPluginLoader.h" |
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21 #include <piprofiler/EngineUIDs.h> |
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22 #include <UTF.H> // CnvUtfConverter |
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23 #include <basched.h> |
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24 |
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25 // constants |
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26 const TInt KWriterCaptionSize = 256; |
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27 |
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28 // ---------------------------------------------------------------------------- |
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29 // CWriterPluginLoader::NewL |
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30 // |
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31 // EPOC two-phased constructor |
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32 // ---------------------------------------------------------------------------- |
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33 // |
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34 CWriterPluginLoader* CWriterPluginLoader::NewL() |
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35 { |
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36 CWriterPluginLoader* self = new( ELeave ) CWriterPluginLoader; |
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37 CleanupStack::PushL( self ); |
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38 self->ConstructL( ); |
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39 CleanupStack::Pop( self ); |
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40 return self; |
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41 } |
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42 |
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43 |
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44 // ---------------------------------------------------------------------------- |
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45 // CWriterPluginLoader::CWriterPluginLoader |
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46 // |
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47 // C++ default constructor can NOT contain any code, that |
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48 // might leave. |
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49 // ---------------------------------------------------------------------------- |
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50 // |
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51 CWriterPluginLoader::CWriterPluginLoader() : CActive( EPriorityStandard ) |
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52 { |
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53 LOGTEXT(_L("CWriterPluginLoader()::CWriterPluginLoader()" )); |
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54 } |
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55 |
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56 |
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57 // ---------------------------------------------------------------------------- |
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58 // CWriterPluginLoader::ConstructL |
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59 // |
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60 // EPOC default constructor can leave. |
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61 // ---------------------------------------------------------------------------- |
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62 // |
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63 void CWriterPluginLoader::ConstructL( ) |
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64 { |
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65 LOGTEXT(_L("CWriterPluginLoader()::ConstructL()" )); |
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66 |
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67 // get list of implementations |
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68 CWriterPluginInterface::ListAllImplementationsL( iImplInfoArray ); |
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69 |
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70 CActiveScheduler::Add( this ); |
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71 } |
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72 |
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73 // ---------------------------------------------------------------------------- |
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74 // CWriterPluginLoader::~CWriterPluginLoader |
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75 // |
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76 // Destructor |
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77 // ---------------------------------------------------------------------------- |
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78 // |
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79 CWriterPluginLoader::~CWriterPluginLoader() |
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80 { |
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81 LOGTEXT(_L("CWriterPluginLoader()::~CWriterPluginLoader()") ); |
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82 |
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83 AbortAsyncLoad(); |
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84 |
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85 Cancel(); |
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86 |
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87 // reset ECOM implementation info array |
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88 iImplInfoArray.ResetAndDestroy(); // This is needed |
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89 iImplInfoArray.Close(); |
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90 } |
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91 |
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92 |
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93 // ---------------------------------------------------------------------------- |
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94 // CWriterPluginLoader::LoadAsync |
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95 // |
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96 // |
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97 // ---------------------------------------------------------------------------- |
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98 // |
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99 void CWriterPluginLoader::LoadAsyncL( CArrayPtrFlat<CWriterPluginInterface>* aPluginArray ) |
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100 { |
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101 iPluginArray = aPluginArray; |
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102 |
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103 // Reset iterator: |
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104 iImplInfoArrayIterator = 0; |
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105 |
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106 LOGSTRING2( "CWriterPluginLoader()::Implementation info count: %d", |
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107 iImplInfoArray.Count() ); |
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108 |
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109 NotifyProgress(); |
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110 |
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111 //Begin CActive asynchronous loop. |
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112 CompleteOwnRequest(); |
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113 } |
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114 |
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115 |
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116 // ---------------------------------------------------------------------------- |
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117 // CWriterPluginLoader::LoadSyncL |
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118 // |
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119 // |
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120 // ---------------------------------------------------------------------------- |
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121 // |
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122 CWriterPluginInterface& CWriterPluginLoader::LoadSyncL( TUid aImplementationUid ) |
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123 { |
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124 Cancel(); |
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125 CWriterPluginInterface* plugin = NULL; |
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126 |
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127 // Get a list of all implementations, even though we only want one specific |
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128 // one. There appears to be no way to otherwise extract a specific implementation |
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129 // info object :( |
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130 // Search for the implementation that matches aImplementationUid |
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131 const TInt impCount = iImplInfoArray.Count(); |
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132 for( TInt i=0; i<impCount; i++ ) |
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133 { |
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134 const CImplementationInformation* info = iImplInfoArray[ i ]; |
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135 if ( info->ImplementationUid() == aImplementationUid ) |
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136 { |
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137 TRAPD(ret, plugin = &CreatePluginInstanceL( *info ); ); |
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138 if( ret == KErrNone ) |
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139 { |
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140 // Plugin ownership is transfered to iPluginArray |
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141 InsertPluginInOrderL( plugin, iPluginArray ); |
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142 } |
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143 else |
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144 { |
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145 // Error note is displayed even if plugin is not loaded |
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146 LOGSTRING3("CWriterPluginLoader::LoadSyncL() - plugin %S load failed, error %d", &info->iDisplayName(), ret); |
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147 } |
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148 break; |
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149 } |
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150 } |
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151 |
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152 if ( plugin == NULL ) |
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153 { |
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154 User::Leave( KErrNotFound ); |
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155 } |
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156 return *plugin; |
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157 } |
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158 |
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159 |
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160 // ---------------------------------------------------------------------------- |
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161 // CWriterPluginLoader::AbortAsyncLoad |
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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 void CWriterPluginLoader::AbortAsyncLoad() |
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167 { |
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168 LOGTEXT(_L("CWriterPluginLoader()::AbortAsyncLoad()" )); |
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169 Cancel(); |
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170 } |
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171 |
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172 |
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173 // ---------------------------------------------------------------------------- |
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174 // CWriterPluginLoader::RunL |
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175 // |
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176 // |
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177 // ---------------------------------------------------------------------------- |
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178 // |
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179 void CWriterPluginLoader::RunL() |
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180 { |
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181 iRunLDebugCount++; |
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182 LoadNextPluginL(); |
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183 |
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184 // Check if there are still more plugins to be loaded: |
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185 if ( iImplInfoArrayIterator < iImplInfoArray.Count() ) |
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186 { |
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187 NotifyProgress(); |
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188 // Continue CActive asynchronous loop. |
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189 CompleteOwnRequest(); |
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190 } |
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191 else |
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192 { |
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193 // All plugins loaded: |
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194 LOGTEXT(_L("CWriterPluginLoader()::Loading plugins finished." )); |
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195 NotifyFinished(); |
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196 } |
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197 } |
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198 |
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199 |
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200 // --------------------------------------------------------------------------- |
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201 // CScGenreItemConstructionConductor::CompleteOwnRequest |
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202 // |
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203 // Issue request complete notification. |
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204 // --------------------------------------------------------------------------- |
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205 void CWriterPluginLoader::CompleteOwnRequest() |
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206 { |
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207 TRequestStatus* status = &iStatus; |
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208 User::RequestComplete( status, KErrNone ); |
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209 SetActive(); |
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210 } |
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211 |
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212 |
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213 // ---------------------------------------------------------------------------- |
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214 // CWriterPluginLoader::RunError |
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215 // |
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216 // |
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217 // ---------------------------------------------------------------------------- |
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218 // |
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219 TInt CWriterPluginLoader::RunError( TInt aError ) |
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220 { |
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221 // This method is called when a plugin loading fails. |
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222 // Always "fake" the return value so that ActiveSchedule |
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223 // keeps running and later plugins are continued to be loaded. |
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224 // Check if still plugins to be loaded: |
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225 if( iImplInfoArrayIterator < iImplInfoArray.Count() ) |
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226 { |
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227 NotifyProgress(); |
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228 |
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229 //Continue CActive asynchronous loop. |
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230 CompleteOwnRequest(); |
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231 } |
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232 else // All plugins loaded: |
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233 { |
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234 NotifyFinished(); |
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235 } |
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236 |
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237 if ( aError == KLeaveExit ) |
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238 { |
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239 return KLeaveExit; |
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240 } |
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241 |
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242 return KErrNone; |
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243 } |
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244 |
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245 |
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246 // ---------------------------------------------------------------------------- |
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247 // CWriterPluginLoader::DoCancel |
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248 // |
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249 // |
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250 // ---------------------------------------------------------------------------- |
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251 // |
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252 void CWriterPluginLoader::DoCancel() |
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253 { |
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254 |
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255 } |
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256 |
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257 |
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258 // ---------------------------------------------------------------------------- |
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259 // CWriterPluginLoader::NotifyProgress |
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260 // |
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261 // |
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262 // ---------------------------------------------------------------------------- |
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263 // |
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264 void CWriterPluginLoader::NotifyProgress() |
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265 { |
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266 if( iObserver ) |
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267 { |
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268 iObserver->HandlePluginLoaded( MWriterPluginLoadObserver::EWriterSuccess); |
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269 } |
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270 } |
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271 |
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272 |
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273 // ---------------------------------------------------------------------------- |
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274 // CWriterPluginLoader::NotifyFinished |
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275 // |
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276 // |
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277 // ---------------------------------------------------------------------------- |
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278 // |
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279 void CWriterPluginLoader::NotifyFinished() |
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280 { |
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281 if( iObserver ) |
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282 { |
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283 iObserver->HandlePluginLoaded( MWriterPluginLoadObserver::EWriterFinished ); |
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284 } |
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285 } |
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286 |
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287 |
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288 // ---------------------------------------------------------------------------- |
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289 // CWriterPluginLoader::SetObserver |
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290 // |
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291 // |
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292 // ---------------------------------------------------------------------------- |
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293 // |
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294 void CWriterPluginLoader::SetObserver(MWriterPluginLoadObserver* aObserver) |
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295 { |
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296 LOGSTRING2("CWriterPluginLoader()::Observer set:0x%X", aObserver); |
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297 iObserver = aObserver; |
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298 } |
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299 |
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300 |
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301 // ---------------------------------------------------------------------------- |
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302 // CWriterPluginLoader::ParseToUid |
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303 // Parses a UID from descriptor of form '0xNNNNNNNN' where N is hexadecimal. |
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304 // |
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305 // ---------------------------------------------------------------------------- |
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306 // |
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307 TInt CWriterPluginLoader::ParseToUid( const TDesC8& aSource, TUid& aTarget ) |
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308 { |
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309 // Remove "0x" from the descriptor if it exists |
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310 _LIT8(KHexPrefix, "0x"); |
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311 |
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312 TPtrC8 pSource( aSource ); |
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313 const TInt prefixPosition = pSource.Find( KHexPrefix ); |
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314 if ( prefixPosition != KErrNotFound ) |
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315 { |
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316 pSource.Set( aSource.Mid( prefixPosition + KHexPrefix().Length() ) ); |
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317 } |
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318 |
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319 // Parse to integer |
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320 TLex8 lex( pSource ); |
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321 TUint integer = 0; |
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322 |
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323 // Parse using TRadix::EHex as radix: |
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324 const TInt err = lex.Val( integer, EHex ); |
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325 aTarget.iUid = integer; |
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326 |
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327 if( err != KErrNone ) |
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328 { |
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329 // If parsing parent UID failed, do not load plugin: |
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330 LOGSTRING2( |
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331 "CWriterPluginLoader()::Parsing parent UID failed. Error code:%d", |
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332 err ); |
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333 } |
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334 return err; |
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335 } |
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336 |
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337 |
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338 // ---------------------------------------------------------------------------- |
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339 // CWriterPluginLoader::ParseOrderNumber |
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340 // |
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341 // |
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342 // ---------------------------------------------------------------------------- |
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343 // |
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344 TInt CWriterPluginLoader::ParseOrderNumber( const TDesC8& aSource, TInt& aOrderNumber ) |
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345 { |
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346 // Parse plugin's order number from opaque_data: |
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347 TLex8 lex( aSource ); |
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348 const TInt orderErr = lex.Val( aOrderNumber ); |
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349 return orderErr; |
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350 } |
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351 |
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352 // ---------------------------------------------------------------------------- |
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353 // CWriterPluginLoader::LoadNextPluginL |
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354 // Iterate through iImplInfoArray. Load the plugin if it is eligible for |
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355 // loading. Loaded plugin is added to iPluginArray. Each time a plugin is |
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356 // loaded, iObserver is notified. |
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357 // |
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358 // ---------------------------------------------------------------------------- |
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359 // |
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360 void CWriterPluginLoader::LoadNextPluginL() |
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361 { |
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362 // Iterate through iImplInfoArray. This loop continues between function |
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363 // calls. Therefore member variable iImplInfoArrayIterator is used as a |
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364 // counter. Loop will break when match is found and continues on next RunL. |
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365 for( ; iImplInfoArrayIterator < iImplInfoArray.Count(); ) |
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366 { |
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367 const CImplementationInformation* info = |
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368 iImplInfoArray[ iImplInfoArrayIterator ]; |
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369 |
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370 iImplInfoArrayIterator++; |
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371 |
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372 // If this plugin is OK -> load it: |
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373 LOGSTRING2( "CWriterPluginLoader() %S eligible for parent", |
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374 &info->DisplayName() ); |
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375 CWriterPluginInterface* plugin = NULL; |
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376 TInt error(KErrNone); |
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377 // Create plugin. Trap leave for debugging purposes. |
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378 TRAP( error, plugin = &CreatePluginInstanceL( *info ); ); |
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379 if( error == KErrNone ) |
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380 { |
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381 // Plugin ownership is transfered to iPluginArray |
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382 InsertPluginInOrderL( plugin, iPluginArray ); |
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383 } |
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384 else |
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385 { |
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386 LOGSTRING3("CWriterPluginLoader::LoadNextPluginL() - plugin %S load failed, error %d", &info->iDisplayName(), error); |
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387 } |
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388 // Wait for next round |
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389 break; |
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390 } |
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391 } |
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392 |
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393 // ---------------------------------------------------------------------------- |
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394 // CWriterPluginLoader::CreatePluginInstanceL |
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395 // |
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396 // |
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397 // ---------------------------------------------------------------------------- |
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398 // |
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399 |
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400 CWriterPluginInterface& CWriterPluginLoader::CreatePluginInstanceL( |
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401 const CImplementationInformation& aImpInfo ) |
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402 { |
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403 // Now we can load the plugin |
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404 const TUid implUid = aImpInfo.ImplementationUid(); |
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405 |
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406 CWriterPluginInterface* plugin = CWriterPluginInterface::NewL( implUid , (TAny*)&aImpInfo.DisplayName() ); |
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407 CleanupStack::PushL ( plugin ); |
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408 |
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409 TInt orderNumber(0); |
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410 const TInt orderErr = ParseOrderNumber( aImpInfo.OpaqueData(), orderNumber ); |
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411 |
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412 if ( orderErr == KErrNone && orderNumber >= 0 ) |
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413 { |
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414 plugin->iOrder = orderNumber; |
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415 } |
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416 |
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417 CleanupStack::Pop( plugin ); // CWriterController is now responsible for this memory. |
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418 |
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419 return *plugin; |
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420 } |
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421 |
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422 // ---------------------------------------------------------------------------- |
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423 // CWriterPluginLoader::SortPluginsL |
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424 // |
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425 // ---------------------------------------------------------------------------- |
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426 // |
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427 void CWriterPluginLoader::SortPluginsL( |
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428 CArrayPtrFlat<CWriterPluginInterface>* aPlugins ) |
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429 { |
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430 RPointerArray<CWriterPluginInterface> plugins; |
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431 TLinearOrder<CWriterPluginInterface> order( CWriterPluginLoader::Compare ); |
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432 |
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433 // Insertion will also order |
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434 for( TInt i = 0; i < aPlugins->Count(); i++ ) |
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435 { |
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436 plugins.InsertInOrderL( (*aPlugins)[i], order ); |
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437 } |
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438 |
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439 // Replace original array content with sorted items |
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440 aPlugins->Reset(); |
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441 for( TInt i = 0; i < plugins.Count(); i++ ) |
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442 { |
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443 aPlugins->AppendL( plugins[i] ); |
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444 } |
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445 } |
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446 |
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447 |
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448 // ---------------------------------------------------------------------------- |
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449 // CWriterPluginLoader::Compare |
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450 // |
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451 // Compare two plugins. |
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452 // Precedence: |
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453 // [1. plugin provider category] |
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454 // 2. plugin order number |
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455 // 3. plugin caption |
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456 // Plugin provider gategory is currently disabled (not supported yet). |
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457 // ---------------------------------------------------------------------------- |
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458 // |
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459 TInt CWriterPluginLoader::Compare( const CWriterPluginInterface& aFirst, |
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460 const CWriterPluginInterface& aSecond ) |
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461 { |
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462 return CompareIndex( aFirst, aSecond ); |
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463 } |
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464 |
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465 |
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466 // ---------------------------------------------------------------------------- |
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467 // CWriterPluginLoader::InsertPluginInOrderL |
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468 // |
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469 // ---------------------------------------------------------------------------- |
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470 // |
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471 void CWriterPluginLoader::InsertPluginInOrderL( |
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472 CWriterPluginInterface* aPlugin, |
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473 CArrayPtrFlat<CWriterPluginInterface>* aPlugins ) |
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474 { |
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475 CWriterPluginInterface* comparedPlugin; |
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476 TInt comparison = 0; |
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477 TBool inserted = EFalse; |
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478 |
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479 for( TInt i = 0; i < aPlugins->Count(); i++ ) |
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480 { |
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481 comparedPlugin = (*aPlugins)[i]; |
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482 // Optimization: do not call time consuming Compare() multiple times! |
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483 comparison = Compare( *aPlugin, *comparedPlugin ); |
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484 if( comparison < 0 ) |
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485 { |
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486 aPlugins->InsertL( i, aPlugin ); |
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487 inserted = ETrue; |
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488 break; |
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489 } |
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490 else if( comparison == 0 ) |
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491 { |
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492 aPlugins->InsertL( i+1, aPlugin ); |
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493 inserted = ETrue; |
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494 break; |
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495 } |
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496 } |
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497 // Plugin was not before any other plugin - make sure it's appended |
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498 if( !inserted ) |
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499 { |
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500 aPlugins->AppendL( aPlugin ); |
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501 } |
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502 |
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503 #ifdef _GS_PLUGINLOADER_SORTING_TRACES |
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504 PrintOrderTraces( aPlugins ); |
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505 #endif // _GS_PLUGINLOADER_SORTING_TRACES |
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506 |
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507 } |
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508 |
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509 // ---------------------------------------------------------------------------- |
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510 // CWriterPluginLoader::CompareCategory |
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511 // |
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512 // ---------------------------------------------------------------------------- |
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513 // |
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514 void CWriterPluginLoader::PrintOrderTraces( |
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515 CArrayPtrFlat<CWriterPluginInterface>* aPlugins ) |
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516 { |
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517 LOGTEXT(_L("---[CWriterPluginLoader] Sorted list---") ); |
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518 HBufC* name = HBufC::New( KWriterCaptionSize ); |
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519 TRAPD(err, CleanupStack::PushL( name )); |
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520 if(err != KErrNone) |
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521 { |
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522 LOGTEXT(_L("Writer plugin loader unable to sort plugins")); |
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523 return; |
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524 } |
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525 |
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526 TPtr ptr = name->Des(); |
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527 CWriterPluginInterface* plg; |
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528 |
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529 for( TInt i = 0; i < aPlugins->Count(); i++ ) |
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530 { |
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531 plg = (*aPlugins)[i]; |
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532 plg->GetCaption( ptr ); |
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533 |
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534 } |
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535 CleanupStack::PopAndDestroy( name ); |
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536 |
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537 } |
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538 |
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539 |
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540 // ---------------------------------------------------------------------------- |
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541 // CWriterPluginLoader::CompareIndex |
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542 // |
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543 // |
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544 // ---------------------------------------------------------------------------- |
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545 // |
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546 |
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547 TInt CWriterPluginLoader::CompareIndex( const CWriterPluginInterface& aFirst, |
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548 const CWriterPluginInterface& aSecond ) |
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549 { |
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550 TInt comparison = KWriterComparisonEqual; |
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551 // The plugin having index is before the one not having one |
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552 |
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553 if( aFirst.iOrder == KWriterPluginNotIndexed && |
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554 aSecond.iOrder == KWriterPluginNotIndexed ) |
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555 { |
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556 // Neither have index -> equal |
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557 comparison = KWriterComparisonEqual; |
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558 } |
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559 else if( aFirst.iOrder == KWriterPluginNotIndexed ) |
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560 { |
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561 // The plugin having index is before the one not having one |
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562 comparison = KWriterComparisonAfter; |
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563 } |
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564 else if( aSecond.iOrder == KWriterPluginNotIndexed ) |
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565 { |
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566 // The plugin having index is before the one not having one |
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567 comparison = KWriterComparisonBefore; |
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568 } |
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569 else if( aFirst.iOrder < aSecond.iOrder ) |
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570 { |
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571 // Compare actual index values |
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572 comparison = KWriterComparisonBefore; |
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573 } |
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574 else if( aFirst.iOrder > aSecond.iOrder ) |
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575 { |
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576 // Compare actual index values |
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577 comparison = KWriterComparisonAfter; |
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578 } |
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579 return comparison; |
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580 } |
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581 |
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582 |
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583 // ---------------------------------------------------------------------------- |
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584 // CWriterPluginLoader::GetDocument |
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585 // |
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586 // |
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587 // ---------------------------------------------------------------------------- |
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588 // |
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589 /* |
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590 CWriterBaseDocument* CWriterPluginLoader::GetDocument() |
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591 { |
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592 CWriterBaseDocument* document = static_cast<CWriterBaseDocument*>( iAppUi->Document() ); |
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593 return document; |
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594 } |
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595 */ |
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596 |
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597 // End of File |