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1
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1 /**
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2 * Copyright: Copyright (c) 2009 Jacob Carlborg.
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3 * Authors: Jacob Carlborg
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4 * Version: Initial created: Feb 4, 2009
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5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0)
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6 */
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7 module dstep.objc.bridge.Bridge;
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8
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9 import mambo.io;
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10
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11 version (Tango)
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12 {
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13 import tango.core.Memory;
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14 import tango.core.Traits : ParameterTupleOf, ReturnTypeOf;
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15
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16 alias GC.addRoot addRoot;
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17 }
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18
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19 else
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20 {
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21 import std.gc : addRoot;
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22 import std.traits : ParameterTypeTuple, ReturnType;
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23
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24 alias ReturnType ReturnTypeOf;
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25 alias ParameterTypeTuple ParameterTupleOf;
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26 }
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27
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28 import dstep.internal.String;
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29 import dstep.internal.Tuple;
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30 import dstep.internal.Version;
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31 import dstep.objc.bridge.Capsule;
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32 import dstep.objc.bridge.ClassInitializer;
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33 import dstep.objc.bridge.TypeEncoding;
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34 import dstep.objc.bridge.Wrapper;
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35 import dstep.objc.message;
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36 import dstep.objc.objc;
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37 import dstep.objc.runtime;
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38
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39 /**
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40 * Builds a string representing a selector out of the given function
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41 *
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42 * It will build the string like this:
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43 *
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44 * ---
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45 * foo (int x, int y); // foo:y:
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46 * bar (); // bar
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47 * fooBar (int x); // fooBar:
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48 * ---
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49 *
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50 * Params:
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51 * func = the function alias to build the selector of
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52 *
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53 * Returns: a string representing the selector
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54 */
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55 template selector (alias func)
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56 {
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57 const selector = buildSelector!(func);
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58 }
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59
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60 template ObjcWrap ()
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61 {
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62 mixin ObjcWrap!(this.stringof);
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63 }
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64
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65 template ObjcWrap (string name)
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66 {
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67 import dstep.objc.bridge.ClassInitializer : ObjcSubclassInitializer, subclassInit;
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68 import dstep.objc.objc : Class, id, IMP, SEL;
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69
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70 static private Class objcClass_;
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71 static private Class objcSuperClass_;
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72
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73 this (id object)
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74 {
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75 super(object);
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76 }
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77
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78 static typeof(this) alloc ()
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79 {
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80 return invokeObjcSelfClass!(typeof(this), "alloc");
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81 }
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82
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83 typeof(this) init ()
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84 {
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85 id ret = invokeObjcSelf!(id, "init");
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86
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87 if (!ret)
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88 return null;
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89
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90 if (ret is objcObject)
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91 {
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92 dObject = this;
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93 return this;
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94 }
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95
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96 auto object = new typeof(this) (ret);
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97 object.dObject = this;
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98
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99 return object;
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100 }
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101
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102 mixin ObjcSubclassInitializer!("D_" ~ name, name);
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103 }
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104
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105 struct ObjcMethodDeclaration (alias imp, R, string name, ARGS...)
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106 {
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107 alias imp methodImp;
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108 alias R returnType;
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109 const string methodName = name;
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110 alias ARGS argsType;
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111 }
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112
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113 template ObjcBindMethod (alias method)
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114 {
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115 import dstep.objc.bridge.TypeEncoding : buildSelector, encode;
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116
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117 mixin ObjcBindMethod!(method, buildSelector!(method));
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118 }
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119
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120 template ObjcBindMethod (alias method, string selector)
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121 {
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122 mixin ObjcBindMethod!(method, ReturnTypeOf!(method), selector, ParameterTupleOf!(method));
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123 }
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124
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125 template ObjcBindMethod (alias method, R, string selector, ARGS...)
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126 {
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127 import dstep.objc.bridge.Capsule : decapsule, encapsule, isCapsule, needsEncapsulation;
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128 import dstep.internal.Tuple;
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129
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130 private ObjcMethodDeclaration!(method, R, selector, ARGS) objcMethodDeclaration;
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131
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132 private R delegate (ARGS) resolveVirtualCall ()
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133 {
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134 return null;
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135 }
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136
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137 static if (needsEncapsulation!(R))
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138 {
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139 private alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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140
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141 private static id forwardVirtualCall (id self, SEL cmd, ObjcArgs objcArgs)
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142 in
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143 {
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144 assert(isCapsule(self));
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145 }
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146 body
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147 {
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148 R delegate (ARGS) dg;
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149 dg.funcptr = &method;
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150 dg.ptr = Bridge.getDObject(self);
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151
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152 ARGS args;
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153
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154 foreach (i, a ; objcArgs)
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155 {
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156 alias typeof(args[i]) ArgType;
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157
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158 args[i] = decapsule!(ArgType)(a);
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159 }
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160
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161 auto result = dg(args);
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162
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163 return encapsule!(R)(result);
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164 }
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165 }
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166
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167 else
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168 {
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169 private alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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170
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171 private static R forwardVirtualCall (id self, SEL cmd, ObjcArgs objcArgs)
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172 in
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173 {
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174 assert(isCapsule(self));
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175 }
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176 body
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177 {
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178 R delegate (ARGS) dg;
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179 dg.funcptr = &method;
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180 dg.ptr = Bridge.getDObject(self);
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181
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182 ARGS args;
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183
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184 foreach (i, a ; objcArgs)
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185 {
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186 alias typeof(args[i]) ArgType;
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187
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188 args[i] = decapsule!(ArgType)(a);
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189 }
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190
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191 return dg(args);
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192 }
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193 }
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194 }
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195
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196 template ObjcBindClassMethod (alias method, string selector)
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197 {
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198 mixin ObjcBindClassMethod!(method, ReturnTypeOf!(method), selector, ParameterTupleOf!(method));
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199 }
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200
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201 template ObjcBindClassMethod (alias method, R, string selector, ARGS...)
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202 {
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203 private ObjcMethodDeclaration!(method, R, selector, ARGS) objcClassMethodDeclaration;
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204
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205 static if (needsEncapsulation!(R))
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206 {
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207 private alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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208
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209 private static id forwardStaticCall (id self, SEL cmd, ObjcArgs objcArgs)
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210 in
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211 {
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212 assert(isCapsule(self));
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213 }
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214 body
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215 {
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216 R function (ARGS) dg = &method;
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217
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218 ARGS args;
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219
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220 foreach (i, a ; objcArgs)
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221 {
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222 alias typeof(args[i]) ArgType;
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223
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224 args[i] = decapsule!(ArgType)(a);
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225 }
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226
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227 auto result = dg(args);
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228
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229 return encapsule!(R)(result);
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230 }
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231 }
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232
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233 else
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234 {
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235 private alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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236
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237 private static R forwardStaticCall (id self, SEL cmd, ObjcArgs objcArgs)
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238 in
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239 {
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240 assert(isCapsule(self));
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241 }
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242 body
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243 {
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244 R function (ARGS) dg = &method;
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245
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246 ARGS args;
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247
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248 foreach (i, a ; objcArgs)
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249 {
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250 alias typeof(args[i]) ArgType;
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251
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252 args[i] = decapsule!(ArgType)(a);
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253 }
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254
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255 return dg(args);
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256 }
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257 }
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258 }
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259
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260 struct Bridge
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261 {
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262 static:
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263
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264 const objcMethodDeclarationVar = "objcMethodDeclaration";
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265 const objcClassMethodDeclarationVar = "objcClassMethodDeclaration";
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266 const dObjectVar = "dObject";
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267 alias void* DObjectType;
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268 private ClassInfo[string] registeredClasses;
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269
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270 void registerClass (string className, ClassInfo classInfo)
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271 {
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272 if (className.length > 2 && className[0 .. 2] == "D_")
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273 registeredClasses[className[0 .. 2]] = classInfo;
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274
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275 else
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276 registeredClasses[className] = classInfo;
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277 }
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278
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279 Object createRegisteredObject (T) (string className)
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280 {
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281 return null;
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282 }
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283
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284 DObjectType getDObject (id self)
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285 {
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286 DObjectType dObject;
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287
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288 self.getInstanceVariable!(DObjectType, dObjectVar)(dObject);
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289
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290 return dObject;
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291 }
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292
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293 id setDObject (Object dObject, id objcObject)
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294 {
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295 auto o = cast(DObjectType) dObject;
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296 addRoot(o);
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297
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298 objcObject.setInstanceVariable!(DObjectType, Bridge.dObjectVar)(o);
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299
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300 return objcObject;
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301 }
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302
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303 R invokeObjcMethod (R, string selector, ARGS...) (id self, ARGS args)
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304 {
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305 static if (!is(R : void))
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306 R result;
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307
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308 SEL sel = sel.registerName!(selector);
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309
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310 alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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311 ObjcArgs objcArgs;
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312
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313 foreach (i, a ; args)
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314 {
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315 alias typeof(a) ArgType;
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316
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317 objcArgs[i] = encapsule!(ArgType)(a);
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318 }
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319
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320 static if (is(R == struct))
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321 {
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322 self.msgSend_stret(result, sel, objcArgs);
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323 return result;
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324 }
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325
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326 else static if (is(R == float) || is(R == double) || is(R == real))
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327 {
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328 version (X86)
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329 {
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330 static if (is(R == float))
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331 return self.msgSend_fpret!(R)(sel, objcArgs);
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332
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333 else
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334 return self.msgSend_fpret(sel, objcArgs);
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335 }
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336
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337 else version (X86_64)
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338 {
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339 static if (is(R == real))
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340 return self.msgSend_fpret(sel, objcArgs);
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341
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342 else
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343 return self.msgSend!(R)(sel, objcArgs);
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344 }
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345
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346 else
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347 return self.msgSend!(R)(sel, objcArgs);
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348 }
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349
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350 else static if (is(R : ObjcWrapper))
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351 {
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352 id r = self.msgSend(sel, objcArgs);
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353
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354 if (!r)
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355 return null;
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356
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357 if (isCapsule(r))
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358 {
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359 result = decapsule!(R)(r);
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360
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361 if (result)
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362 return result;
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363 }
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364
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365 return new R(r);
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366 }
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367
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368 else static if (is(R : Object))
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369 {
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370 id r = self.msgSend(sel, objcArgs);
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371
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372 if (!r)
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373 return null;
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374
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375 return decapsule!(R)(r);
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376 }
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377
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378 else
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379 return self.msgSend!(R, ObjcArgs)(sel, objcArgs);
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380 }
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381
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382 R invokeObjcClassMethod (R = id, string selector, ARGS...) (Class cls, ARGS args)
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383 {
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384 return invokeObjcMethod!(R, selector, ARGS)(cast(id) cls, args);
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385 }
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386
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387 R invokeObjcSuperMethod (R = id, string selector, ARGS...) (objc_super* self, ARGS args)
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388 {
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389 R result;
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390 SEL sel = sel.registerName!(selector);
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391
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392 alias ReplaceAllClasses!(id, ARGS) ObjcArgs;
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393 ObjcArgs objcArgs;
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394
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395 foreach (i, a ; args)
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396 {
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397 alias typeof(a) ArgType;
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398
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399 objcArgs[i] = encapsule!(ArgType)(a);
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400 }
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401
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402 static if (is(R == struct))
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403 {
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404 self.msgSendSuper_stret(result, sel, objcArgs);
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405 }
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406
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407 else static if (is(R : ObjcWrapper))
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408 {
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409 id r = self.msgSendSuper(sel, objcArgs);
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410
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411 if (isCapsule(r))
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412 {
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413 result = decapsule!(R)(r);
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414
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415 if (result)
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416 return result;
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417 }
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418
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419 return r ? new R(r) : null;
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420 }
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421
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422 else static if (is(R : Object))
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423 {
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424 id r = self.msgSendSuper(sel, objcArgs);
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425 return decapsule!(R)(r);
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426 }
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427
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428 else
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429 return self.msgSend!(R)(sel, objcArgs);
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430 }
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431 } |
