Mercurial > projects > qtd
annotate d2/qtd/QtdObject.d @ 414:b2a803c73b89 default tip
Declare tabArray const.
author | David Nadlinger <code@klickverbot.at> |
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date | Fri, 06 May 2011 13:39:49 +0200 |
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253 | 1 /** |
2 * | |
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3 * Copyright: Copyright QtD Team, 2008-2010 |
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4 * License: Boost License 1.0 |
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5 * Authors: Max Samukha, Eldar Insafutdinov |
253 | 6 * |
7 */ | |
8 | |
344 | 9 module qtd.QtdObject; |
253 | 10 |
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11 import |
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12 core.memory, |
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13 std.bitmanip, |
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14 qtd.Core, |
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15 qtd.Debug, |
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16 qtd.meta.Runtime; |
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17 |
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18 /** |
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19 QtdObject initialization options. |
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20 */ |
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21 enum QtdObjectInitFlags |
253 | 22 { |
23 none, | |
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24 /// The wrapper is being created by user code. |
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25 createdByD = 0x1, |
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26 /// The wrapper is being created with native ownership. |
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27 nativeOwnership = 0x2, |
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28 /// The wrapper is allocated on stack. |
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29 onStack = 0x4 |
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30 } |
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31 |
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32 /** |
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33 */ |
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34 enum QtdObjectOwnership |
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35 { |
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36 /// |
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37 native, |
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38 /// |
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39 d |
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40 } |
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41 |
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42 /** |
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43 */ |
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44 struct QtdObjectFlags |
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45 { |
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46 mixin (bitfields!( |
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47 bool, "nativeDeleteDisabled" , 1, |
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48 bool, "wrapperDeleteDisabled" , 1, |
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49 bool, "createdByD" , 1, |
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50 bool, "pinned" , 1, |
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51 bool, "isQObject" , 1, |
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52 bool, "polymorphic" , 1, |
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53 bool, "onStack" , 1, |
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54 int , "reserved" , 1 |
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55 )); |
253 | 56 } |
57 | |
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58 |
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59 /* package */ abstract class QtdObject |
253 | 60 { |
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61 alias typeof(this) This; |
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62 |
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63 private |
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64 { |
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65 void* _nativeId; |
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66 This _next; |
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67 This _prev; |
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68 __gshared static This _root; |
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69 } |
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70 |
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71 protected QtdObjectFlags _flags; |
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72 |
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73 /** |
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74 */ |
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75 @property QtdObjectFlags qtdFlags() |
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76 { |
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77 return _flags; |
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78 } |
253 | 79 |
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80 /** |
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81 */ |
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82 @property final const |
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83 { |
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84 void* qtdNativeId() |
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85 { |
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86 return cast(void*)_nativeId; |
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87 } |
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88 |
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89 void qtdNativeId(void* v) |
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90 { |
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91 unqual(_nativeId) = v; |
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92 } |
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93 } |
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94 |
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95 this(void* nativeId, QtdObjectInitFlags initFlags = QtdObjectInitFlags.none) |
253 | 96 { |
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97 _nativeId = nativeId; |
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98 |
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99 if (initFlags & QtdObjectInitFlags.createdByD) |
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100 _flags.createdByD = true; |
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101 |
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102 if (initFlags & QtdObjectInitFlags.nativeOwnership) |
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103 qtdSetOwnership(QtdObjectOwnership.native); |
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104 |
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105 if (initFlags & QtdObjectInitFlags.onStack) |
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106 { |
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107 //assert(!_flags.isQObject); |
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108 assert(!(initFlags & QtdObjectInitFlags.nativeOwnership)); |
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109 |
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110 _flags.nativeDeleteDisabled = true; |
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111 _flags.wrapperDeleteDisabled = true; |
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112 } |
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113 |
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114 mixin(debugHandler("onWrapperConstructed", "this")); |
253 | 115 } |
116 | |
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117 /** |
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118 Disables GC for this object; |
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119 */ |
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120 final void qtdPin() const |
253 | 121 { |
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122 assert(!_flags.pinned); |
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123 //GC.addRoot(cast(void*)this); |
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124 |
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125 auto obj = unqual(this); |
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126 |
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127 obj._next = _root; |
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128 _root = obj; |
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129 if (_next) |
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130 obj._next._prev = obj; |
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131 |
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132 obj._flags.pinned = true; |
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133 } |
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134 |
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135 /** |
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136 Multiple wrappers for a single native object may exist. |
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137 This function is used to test that this and the other wrapper point |
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138 to the same native object (identity test). |
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139 |
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140 Note that wrappers for QObject instances and instances of classes |
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141 derived from QObject are always unique, therefore |
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142 the 'is' operator can be used instead of this function. |
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143 */ |
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144 final bool isSame(const(QtdObject) other) const |
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145 { |
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146 return other !is null && (other is this || other.qtdNativeId == qtdNativeId); |
253 | 147 } |
148 | |
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149 /** |
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150 Enables GC for this object. |
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151 */ |
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152 final void qtdUnpin() const |
253 | 153 { |
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154 assert(_flags.pinned); |
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155 //GC.removeRoot(cast(void*)this); |
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156 |
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157 auto obj = unqual(this); |
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158 if (_prev) |
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159 obj._prev._next = obj._next; |
253 | 160 else |
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161 _root = obj._next; |
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162 |
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163 if (_next) |
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164 obj._next._prev = obj._prev; |
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165 |
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166 obj._flags.pinned = false; |
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167 } |
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168 |
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169 /** |
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170 Sets the ownership of this object. |
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171 Setting the same ownership twice results in undefined behavior. |
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172 */ |
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173 void qtdSetOwnership(QtdObjectOwnership own) const |
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174 { |
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175 if (_flags.isQObject) |
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176 return; |
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177 |
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178 assert(!_flags.onStack); |
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179 auto obj = unqual(this); |
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180 |
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181 if (own == QtdObjectOwnership.native) |
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182 { |
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183 if (_flags.polymorphic && _flags.createdByD) |
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184 qtdPin(); |
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185 else |
386 | 186 { |
187 assert (!obj._flags.nativeDeleteDisabled); | |
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188 obj._flags.nativeDeleteDisabled = true; |
386 | 189 } |
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190 } |
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191 else if (own == QtdObjectOwnership.d) |
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192 { |
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193 if (_flags.polymorphic && _flags.createdByD) |
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194 qtdUnpin(); |
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195 else |
386 | 196 { |
197 assert(obj._flags.nativeDeleteDisabled); | |
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198 obj._flags.nativeDeleteDisabled = false; |
386 | 199 } |
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200 } |
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201 else |
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202 assert(false); |
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203 |
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204 mixin(debugHandler("onObjectOwnershipChanged", "obj")); |
386 | 205 } |
206 | |
253 | 207 // COMPILER BUG: 3206 |
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208 protected void qtdDeleteNative() |
253 | 209 { |
210 assert(false); | |
211 } | |
212 | |
213 ~this() | |
214 { | |
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215 mixin(debugHandler("onWrapperDestruction", "this")); |
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216 |
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217 if (!_flags.nativeDeleteDisabled) |
253 | 218 { |
219 // avoid deleting D object twice. | |
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220 _flags.wrapperDeleteDisabled = true; |
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221 qtdDeleteNative; |
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222 |
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223 mixin(debugHandler("onNativeDeleted", "this")); |
253 | 224 } |
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225 |
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226 if (_flags.pinned) |
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227 qtdUnpin(); |
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228 |
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229 mixin(debugHandler("onWrapperDestroyed", "this")); |
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230 } |
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231 } |
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232 |
386 | 233 /* package */ abstract class PolymorphicObject : QtdObject |
234 { | |
235 this(void* nativeId, QtdObjectInitFlags initFlags = QtdObjectInitFlags.none) | |
236 { | |
237 _flags.polymorphic = true; | |
238 super(nativeId, initFlags); | |
239 } | |
240 | |
241 abstract QtdMetaClass metaObject(); | |
242 } | |
243 | |
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244 /** |
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245 Base class for polymorphic non-QObjects (TBD). |
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246 */ |
386 | 247 /* package */ abstract class NonQObject : PolymorphicObject |
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248 { |
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249 alias NonQObjectMetaClass Meta; |
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250 |
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251 this(void* nativeId, QtdObjectInitFlags initFlags) |
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252 { |
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253 super(nativeId, initFlags); |
253 | 254 } |
386 | 255 |
256 override abstract Meta metaObject(); | |
253 | 257 } |
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258 |
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259 /** |
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260 Base class for QtD meta-object classes. |
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261 */ |
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262 abstract class QtdMetaClass : MetaClass |
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263 { |
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264 alias QtdObject function(void* nativeId, QtdObjectInitFlags initFlags) CreateWrapper; |
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265 |
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266 private void* _nativeId; |
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267 protected CreateWrapper _createWrapper; |
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268 |
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269 this() {} |
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270 |
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271 /** |
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272 */ |
386 | 273 @property void* nativeId() |
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274 { |
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275 return _nativeId; |
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276 } |
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277 |
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278 void construct(T)() |
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279 { |
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280 super.construct!T(); |
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281 _nativeId = T.qtdNativeStaticMetaObject(); |
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282 _createWrapper = &T.qtdCreateWrapper; |
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283 } |
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284 |
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285 abstract QtdObject getWrapper(void* nativeId, QtdObjectInitFlags initFlags = QtdObjectInitFlags.none); |
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286 } |
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287 |
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288 /** |
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289 Meta-object class for non-QObject polymorphic classes. |
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290 */ |
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291 final class NonQObjectMetaClass : QtdMetaClass |
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292 { |
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293 alias typeof(this) This; |
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294 alias createImpl!This create; |
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295 |
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296 @property override This next() |
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297 { |
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298 return static_cast!This(super.next); |
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299 } |
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300 |
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301 @property override This firstDerived() |
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302 { |
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303 return static_cast!This(super.firstDerived); |
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304 } |
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305 |
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306 override QtdObject getWrapper(void* nativeId, QtdObjectInitFlags initFlags) |
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307 { |
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308 // traverse the inheritance tree to find a matching meta-object. |
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309 // if the exact match is not found, return the closest base. |
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310 This lookUp(This mo) |
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311 { |
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312 if (!qtdTypeInfosEqual(mo.nativeId, nativeId)) |
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313 { |
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314 for (auto mo2 = mo.firstDerived; mo2 !is null; mo2 = mo2.next) |
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315 { |
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316 mo2 = lookUp(mo2); |
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317 if (mo != mo2) |
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318 break; |
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319 } |
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320 } |
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321 return mo; |
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322 } |
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323 |
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324 auto mo = lookUp(this); |
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325 return static_cast!NonQObject(mo._createWrapper(nativeId, initFlags)); |
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326 } |
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327 } |
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328 |
386 | 329 extern(C) bool qtdTypeInfosEqual(void* info1, void* info2); |
372
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330 |
357
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331 mixin(qtdExport("void", "QtdObject_delete", "void* dId", |
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332 q{ |
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333 auto obj = cast(QtdObject)dId; |
354
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334 |
383 | 335 mixin(debugHandler("onDeletingWrapperFromNative", "obj")); |
372
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336 |
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337 if (!obj._flags.wrapperDeleteDisabled) |
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338 { |
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339 // Avoid deleting native object twice |
372
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340 obj._flags.nativeDeleteDisabled = true; |
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341 delete obj; |
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342 } |
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343 })); |