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1 // Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include "server.h" |
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17 #include "WSGRAPHICDRAWERFACTORY.H" |
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18 #include "panics.h" |
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19 #include <s32mem.h> |
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20 #include "wstop.h" |
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21 |
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22 TInt CWsGraphicDrawerObject::TransientSequence=1; |
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23 TBool CWsGraphicDrawerObject::RollOver=EFalse; |
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24 |
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25 CWsGraphicDrawerObject* CWsGraphicDrawerObject::NewL(CWsClient* aClient,const TWsClCmdUnion &aParams) |
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26 { |
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27 if(!aClient) |
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28 { |
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29 WS_PANIC_DEBUG(EWsPanicWsGraphic); |
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30 User::Leave(KErrGeneral); |
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31 } |
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32 TGraphicDrawerId id; |
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33 id.iId = aParams.CreateGraphic->iId; |
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34 id.iIsUid = !(EWsGraphicIdTransient & aParams.CreateGraphic->iFlags); |
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35 // check for collision |
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36 const CWsGraphicDrawer* dup = CWsTop::WindowServer()->ResolveGraphic(id); |
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37 // request-specific checks |
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38 if(dup) |
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39 { |
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40 // must be exact same session |
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41 if(&(dup->Owner()) != aClient) |
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42 { |
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43 /* Someone is squatting on someone else's uid, or trying to, |
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44 but there is no good way to know which. */ |
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45 __DEBUG_ONLY(aClient->PPanic(EWservPanicPermissionDenied);) |
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46 User::Leave(KErrAlreadyExists); |
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47 } |
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48 // dupping or otherwise must be explicitly intended by the client |
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49 if(!(EWsGraphicReplace & aParams.CreateGraphic->iFlags)) |
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50 { |
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51 aClient->PPanic(EWservPanicPermissionDenied); |
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52 } |
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53 } |
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54 else |
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55 { |
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56 // dupping or otherwise must be explicitly intended by the client |
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57 if(EWsGraphicReplace & aParams.CreateGraphic->iFlags) |
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58 { |
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59 aClient->PPanic(EWservPanicPermissionDenied); |
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60 } |
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61 if(id.iIsUid) |
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62 { |
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63 // police creation of artwork with UIDs |
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64 _LIT_SECURITY_POLICY_C1(KSecurityPolicyCreateWithUid,ECapabilityProtServ); |
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65 if(!KSecurityPolicyCreateWithUid.CheckPolicy(aClient->Client())) |
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66 { |
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67 __DEBUG_ONLY(aClient->PPanic(EWservPanicPermissionDenied);) |
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68 User::Leave(KErrPermissionDenied); |
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69 } |
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70 } |
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71 else |
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72 { |
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73 // allocate a new transient id |
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74 // assumption: that there are more values of a TInt than there are possibly Transient objects |
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75 do |
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76 { |
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77 id.iId = TransientSequence++; |
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78 RollOver |= !TransientSequence; |
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79 } |
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80 while(RollOver && CWsTop::WindowServer()->ResolveGraphic(id)); // until no collision |
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81 } |
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82 } |
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83 // create the drawer object |
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84 TPtrC8 data; |
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85 HBufC8* dataBuf = NULL; |
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86 if(aParams.CreateGraphic->iRemoteReadData) |
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87 { |
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88 const TInt len = aParams.CreateGraphic->iDataLen; |
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89 if ((len >= KMaxTInt/4) || (len < 0)) |
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90 aClient->PPanic(EWservPanicBuffer); |
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91 dataBuf = HBufC8::NewLC(len); |
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92 TPtr8 des = dataBuf->Des(); |
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93 aClient->RemoteRead(des,0); |
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94 if(des.Size() != len) |
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95 { |
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96 aClient->PPanic(EWservPanicBuffer); |
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97 } |
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98 data.Set(des); |
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99 } |
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100 else |
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101 { |
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102 data.Set(CWsClient::BufferTPtr8((TText8*)(aParams.CreateGraphic+1),aParams.CreateGraphic->iDataLen)); |
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103 } |
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104 |
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105 CWsGraphicDrawerObject* drawer = new(ELeave) CWsGraphicDrawerObject(aClient); |
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106 CleanupStack::PushL(drawer); |
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107 drawer->ConstructL(aParams.CreateGraphic->iType,*CWsTop::WindowServer(),id,data,aParams.CreateGraphic->iClientHandle); |
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108 if(!dup) |
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109 { |
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110 User::LeaveIfError(CWsTop::WindowServer()->AddGraphicDrawer(drawer->Drawer())); |
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111 } |
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112 else |
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113 { |
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114 User::LeaveIfError(CWsTop::WindowServer()->SwapGraphicDrawer(drawer->Drawer())); |
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115 } |
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116 // take off cleanup stack |
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117 CleanupStack::Pop(drawer); |
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118 if(dataBuf) |
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119 { |
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120 CleanupStack::PopAndDestroy(dataBuf); |
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121 } |
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122 // delete dup, which means resolving the object that encapsulates it |
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123 if(dup) |
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124 { |
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125 CWsGraphicDrawerObject* obj = aClient->DrawerObject(dup); |
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126 WS_ASSERT_DEBUG(obj, EWsPanicWsGraphic); |
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127 if(obj) |
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128 { |
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129 obj->CloseObject(); |
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130 } |
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131 } |
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132 // trigger redraws if anyone is drawing this graphic before it exists |
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133 if(id.iIsUid) |
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134 { |
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135 CWsTop::WindowServer()->Invalidate(id); |
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136 } |
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137 // done |
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138 return drawer; |
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139 } |
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140 |
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141 CWsGraphicDrawerObject::CWsGraphicDrawerObject(CWsClient* aOwner): |
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142 CWsObject(aOwner,WS_HANDLE_GRAPHIC_DRAWER) |
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143 { |
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144 } |
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145 |
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146 CWsGraphicDrawerObject::~CWsGraphicDrawerObject() |
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147 { |
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148 delete iDrawer; |
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149 } |
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150 |
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151 void CWsGraphicDrawerObject::ConstructL(TUid aType,MWsGraphicDrawerEnvironment& aEnv,const TGraphicDrawerId& aId,const TDesC8& aData,TInt aClientHandle) |
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152 { |
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153 CWsGraphicDrawer* drawer = WsGraphicDrawer::CreateLC(aType,aEnv,aId,*WsOwner(),aData); |
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154 NewObjL(); |
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155 iClientHandle = aClientHandle; |
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156 iDrawer=drawer; |
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157 CleanupStack::Pop(iDrawer); |
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158 } |
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159 |
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160 void CWsGraphicDrawerObject::CommandL(TInt aOpcode, const TAny *aCmdData) |
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161 { |
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162 WS_ASSERT_DEBUG(iDrawer, EWsPanicWsGraphic); |
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163 |
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164 if(iDrawer) |
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165 { |
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166 TWsClCmdUnion pData; |
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167 pData.any = aCmdData; |
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168 switch(aOpcode) |
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169 { |
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170 case EWsGdOpFree: |
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171 // trigger redraws if anyone is drawing this graphic before it exists |
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172 CWsTop::WindowServer()->RemoveGraphicDrawer(iDrawer->Id()); |
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173 CloseObject(); |
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174 return; |
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175 case EWsGdOpSendMsg: |
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176 case EWsGdOpSendSynchronMsg: |
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177 { |
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178 const TWsClCmdGdSendMessage& cmd = *pData.GraphicSendMessage; |
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179 __ASSERT_DEBUG(cmd.iDataLen,WsOwner()->PPanic(EWservPanicPermissionDenied)); |
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180 if(cmd.iDataLen) |
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181 { |
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182 if(cmd.iRemoteReadData) |
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183 { |
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184 HBufC8* wsAlloc = NULL; |
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185 TUint8* drawerAlloc = NULL; |
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186 TPtr8 des(NULL,0); |
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187 // try to get the drawer to allocate for us |
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188 MWsGraphicDrawerMessageAlloc* drawerAllocator = iDrawer->ObjectInterface<MWsGraphicDrawerMessageAlloc>(); |
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189 if(drawerAllocator) |
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190 { |
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191 drawerAlloc = reinterpret_cast<TUint8*>(drawerAllocator->Alloc(cmd.iDataLen)); |
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192 if(drawerAlloc) |
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193 des.Set(drawerAlloc,0,cmd.iDataLen); |
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194 } |
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195 // else use the normal WSERV default heap |
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196 if(!drawerAlloc) |
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197 { |
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198 wsAlloc = HBufC8::NewLC(cmd.iDataLen); |
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199 des.Set(wsAlloc->Des()); |
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200 } |
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201 // fetch |
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202 WsOwner()->RemoteRead(des,0); |
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203 TBool receivedOk = (des.Size() == cmd.iDataLen); |
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204 // dispatch |
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205 if(receivedOk) |
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206 { |
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207 if(aOpcode == EWsGdOpSendMsg) |
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208 { |
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209 iDrawer->HandleMessage(des); |
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210 } |
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211 else |
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212 { |
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213 MWsGraphicHandleSynchronMessage* obj = iDrawer->ObjectInterface<MWsGraphicHandleSynchronMessage>(); |
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214 |
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215 if(obj) |
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216 SetReply(obj->HandleSynchronMessage(des)); |
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217 else |
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218 SetReply(KErrNotSupported); |
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219 } |
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220 } |
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221 |
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222 // dealloc |
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223 if(drawerAlloc) |
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224 { |
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225 drawerAllocator->Free(drawerAlloc); |
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226 } |
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227 else |
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228 { |
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229 CleanupStack::PopAndDestroy(wsAlloc); |
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230 } |
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231 // defer panic until after dealloc |
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232 if(!receivedOk) |
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233 { |
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234 WsOwner()->PPanic(EWservPanicBuffer); |
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235 } |
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236 } |
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237 else |
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238 { |
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239 const TPtrC8 data = CWsClient::BufferTPtr8((TText8*)(pData.GraphicSendMessage+1),cmd.iDataLen); |
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240 if(aOpcode == EWsGdOpSendMsg) |
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241 { |
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242 iDrawer->HandleMessage(data); |
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243 } |
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244 else |
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245 { |
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246 MWsGraphicHandleSynchronMessage* obj = iDrawer->ObjectInterface<MWsGraphicHandleSynchronMessage>(); |
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247 if(obj) |
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248 SetReply(obj->HandleSynchronMessage(data)); |
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249 else |
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250 SetReply(KErrNotSupported); |
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251 } |
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252 } |
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253 } |
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254 } |
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255 break; |
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256 case EWsGdOpGetGraphicId: |
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257 { |
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258 __ASSERT_COMPILE(sizeof(TWsClCmdGdGetId) == sizeof(TGraphicDrawerId)); |
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259 const TGraphicDrawerId id = iDrawer->Id(); |
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260 CWsClient::ReplyBuf(&id,sizeof(id)); |
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261 } |
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262 break; |
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263 case EWsGdOpShareGlobally: |
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264 SetReply(iDrawer->ShareGlobally()); |
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265 break; |
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266 case EWsGdOpUnShareGlobally: |
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267 SetReply(iDrawer->UnShareGlobally()); |
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268 break; |
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269 case EWsGdOpShare: |
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270 { |
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271 const TSecureId& secid = *reinterpret_cast<const TSecureId*>(aCmdData); |
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272 SetReply(iDrawer->Share(secid)); |
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273 break; |
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274 } |
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275 case EWsGdOpUnShare: |
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276 { |
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277 const TSecureId& secid = *reinterpret_cast<const TSecureId*>(aCmdData); |
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278 SetReply(iDrawer->UnShare(secid)); |
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279 break; |
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280 } |
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281 default: |
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282 WsOwner()->PPanic(EWservPanicOpcode); |
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283 } |
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284 } |
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285 } |
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286 |
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287 CWsGraphicDrawer* CWsGraphicDrawerObject::Drawer() |
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288 { |
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289 return iDrawer; |
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290 } |
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291 |
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292 const CWsGraphicDrawer* CWsGraphicDrawerObject::Drawer() const |
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293 { |
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294 return iDrawer; |
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295 } |
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296 |
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297 // CWsGraphicMessageQueue \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ |
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298 |
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299 CWsGraphicMessageQueue::CMessage* CWsGraphicMessageQueue::CMessage::New(const TDesC8& aData) |
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300 { |
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301 return new(aData.Size()) CMessage(aData); |
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302 } |
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303 |
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304 CWsGraphicMessageQueue::CMessage::CMessage(const TDesC8& aData): |
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305 iData((reinterpret_cast<TUint8*>(this)+sizeof(*this)),aData.Size()) |
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306 { |
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307 iData = aData; |
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308 } |
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309 |
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310 TPtrC8 CWsGraphicMessageQueue::CMessage::Data() const |
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311 { |
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312 return iData; |
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313 } |
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314 |
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315 void CWsGraphicMessageQueue::CMessage::Release() |
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316 { |
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317 delete this; |
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318 } |
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319 |
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320 CWsGraphicMessageQueue::CMessage::~CMessage() |
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321 { |
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322 } |
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323 |
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324 CWsGraphicMessageQueue::CWsGraphicMessageQueue(CWsClient *aOwner): |
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325 CEventBase(aOwner) |
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326 { |
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327 } |
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328 |
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329 CWsGraphicMessageQueue::~CWsGraphicMessageQueue() |
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330 { |
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331 while(iHead) |
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332 { |
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333 CWsMessageData* msg = iHead; |
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334 iHead = iHead->iNext; |
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335 msg->Release(); |
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336 } |
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337 } |
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338 |
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339 TInt CWsGraphicMessageQueue::TopClientHandle() const |
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340 { |
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341 if(iHead) |
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342 return iHead->iClientHandle; |
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343 else |
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344 return KErrNotFound; |
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345 } |
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346 |
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347 /** |
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348 same functionality as CEventBase::GetData, but this one also inserts the integer header in the reply. |
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349 */ |
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350 void CWsGraphicMessageQueue::GetDataWithHeader(TUint aHeader, const TDesC8& aData, TInt aDataLen) |
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351 { |
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352 TPckgBuf<TUint> hdr = aHeader | (EWsGraphMessageTypeUser & 0x03); |
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353 CWsClient::ReplyBuf(hdr.Ptr(), sizeof(TUint)); |
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354 GetData((void*)aData.Ptr(), aDataLen); |
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355 } |
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356 |
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357 void CWsGraphicMessageQueue::GetGraphicMessage() |
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358 { |
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359 CWsMessageData* top = Pop(); |
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360 WS_ASSERT_DEBUG(top && top->Data().Length(), EWsPanicWsGraphic); |
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361 if(top) |
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362 { |
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363 GetDataWithHeader(top->iClientHandle, top->Data(), top->Data().Size()); |
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364 CWsGraphicDrawerObject* obj = iWsOwner->DrawerObject(top->iDrawer); |
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365 if(obj) |
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366 { |
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367 MWsGraphicMessageCallback* messageCallback = obj->Drawer()->ObjectInterface<MWsGraphicMessageCallback>(); |
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368 if(messageCallback) |
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369 { |
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370 messageCallback->HandleMessageDelivery(top->iId, KErrNone); |
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371 } |
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372 } |
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373 |
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374 top->Release(); |
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375 } |
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376 } |
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377 |
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378 void CWsGraphicMessageQueue::AbortMessage(TInt aError) |
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379 { |
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380 CWsMessageData* top = Pop(); |
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381 WS_ASSERT_DEBUG(top, EWsPanicWsGraphic); |
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382 if(top) |
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383 { |
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384 CWsGraphicDrawerObject* obj = iWsOwner->DrawerObject(top->iDrawer); |
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385 if(obj) |
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386 { |
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387 MWsGraphicMessageCallback* messageCallback = obj->Drawer()->ObjectInterface<MWsGraphicMessageCallback>(); |
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388 if(messageCallback) |
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389 { |
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390 messageCallback->HandleMessageDelivery(top->iId, aError); |
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391 } |
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392 } |
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393 top->Release(); |
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394 } |
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395 } |
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396 |
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397 void CWsGraphicMessageQueue::EventReady(const RMessagePtr2& aEventMsg) |
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398 { |
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399 CEventBase::EventReady(aEventMsg); |
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400 if(iHead) |
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401 { |
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402 SignalEvent(sizeof(TInt) + iHead->Data().Size()); |
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403 } |
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404 } |
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405 |
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406 |
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407 void CWsGraphicMessageQueue::Queue(CWsMessageData* aMessage) |
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408 { |
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409 WS_ASSERT_DEBUG(aMessage && !aMessage->iNext, EWsPanicWsGraphic); |
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410 if(aMessage) |
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411 { |
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412 if(iHead) |
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413 { |
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414 iTail->iNext = aMessage; |
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415 iTail = aMessage; |
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416 } |
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417 else |
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418 { |
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419 iHead = iTail = aMessage; |
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420 if(!iEventMsg.IsNull()) |
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421 SignalEvent(sizeof(TInt) + iHead->Data().Size()); |
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422 } |
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423 } |
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424 } |
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425 |
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426 CWsMessageData* CWsGraphicMessageQueue::Pop() |
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427 { |
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428 CWsMessageData* ret = NULL; |
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429 if(iHead) |
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430 { |
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431 ret = iHead; |
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432 iHead = iHead->iNext; |
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433 } |
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434 return ret; |
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435 } |