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288
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1 module qt.qtd.MetaMarshall;
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2
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3 import std.traits;
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4
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309
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5 // utilities
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302
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6 // shouldn't be here
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7
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309
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8 public bool startsWith(T)(T[] source, T[] pattern)
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9 {
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10 return source.length >= pattern.length && source[0 .. pattern.length] == pattern[];
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11 }
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12
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302
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13 string __toString(long v)
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14 {
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15 if (v == 0)
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16 return "0";
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17
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18 string ret;
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19
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20 bool neg;
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21 if (v < 0)
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22 {
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23 neg = true;
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24 v = -v;
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25 }
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26
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27 while (v != 0)
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28 {
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29 ret = cast(char)(v % 10 + '0') ~ ret;
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30 v = cast(long)(v / 10);
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31 }
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32
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33 if (neg)
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34 ret = "-" ~ ret;
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35
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36 return ret;
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37 }
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38
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309
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39 template templateParam(U : V!(U), alias V)
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40 {
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41 alias U templateParam;
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42 }
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43
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44
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45 /*
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46 * actual stuff
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47 */
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48
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288
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49 template isQObjectType(T) // is a QObject type that belongs to the library
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50 {
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292
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51 enum isQObjectType = is(T.__isQObjectType);
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288
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52 }
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53
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293
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54 template isObjectType(T) // is a Qt Object type that belongs to the library
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288
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55 {
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292
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56 enum isObjectType = is(T.__isObjectType);
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288
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57 }
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58
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293
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59 template isValueType(T) // is a Qt Value type that belongs to the library
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288
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60 {
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293
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61 enum isValueType = is(T.__isValueType);
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288
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62 }
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63
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64 template isNativeType(T) // type that doesn't require conversion i.e. is the same in C++ and D
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65 {
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302
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66 enum isNativeType = isNumeric!T || is(T == bool) || is(T == struct);
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67 }
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68
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69 template isStringType(T) // string type
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70 {
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71 enum isStringType = is(T == string);
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288
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72 }
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73
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309
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74 template isQList(T)
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75 {
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76 enum isQList = startsWith(Unqual!(T).stringof, "QList!");
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77 }
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78
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288
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79 // converts an argumnent from C++ to D in qt_metacall
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80 string metaCallArgument(T)(string ptr)
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81 {
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303
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82 static if (isQObjectType!T || isObjectType!T)
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288
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83 return T.stringof ~ ".__getObject(*cast(void**)(" ~ ptr ~ "))";
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318
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84 else static if (isValueType!T)
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85 return "new " ~ T.stringof ~ "(" ~ T.stringof ~ ".__constructNativeCopy(" ~ ptr ~ "))";
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288
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86 else static if (isNativeType!T)
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87 return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
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302
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88 else static if (isStringType!T)
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89 return "QStringUtil.toNativeString(" ~ ptr ~ ")";
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288
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90 else
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91 return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
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92 //res = T.stringof;
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93 }
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94
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95 // converts a D argument type to C++ for registering in Qt meta system
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96 string qtDeclArg(T)()
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97 {
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303
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98 static if (isQObjectType!T || isObjectType!T)
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288
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99 return T.stringof ~ "*";
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318
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100 else static if (isValueType!T)
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101 return T.stringof;
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302
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102 else static if (isStringType!T)
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103 return "QString";
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309
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104 else static if (isQList!T)
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318
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105 {
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106 alias templateParam!T ElementType;
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107 static if (is(ElementType == string))
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108 return "QStringList";
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109 else
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110 return "QList<" ~ qtDeclArg!(templateParam!T)() ~ ">";
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111 }
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288
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112 else static if (isNativeType!T)
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302
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113 return Unqual!T.stringof;
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288
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114 else
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115 return T.stringof;
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116 }
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117
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118 // converts an argument from D to C++ in a signal emitter
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119 string convertSignalArgument(T)(string arg)
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120 {
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303
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121 static if (isQObjectType!T || isObjectType!T)
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318
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122 return "&" ~ arg ~ ".__nativeId";
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123 else static if (isValueType!T)
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288
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124 return arg ~ ".__nativeId";
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302
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125 else static if (isStringType!T)
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318
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126 return "&_qt" ~ arg;
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288
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127 else static if (isNativeType!T)
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318
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128 return "&" ~ arg;
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288
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129 else
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318
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130 return "&" ~ arg;
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288
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131 }
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302
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132
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133 string prepareSignalArguments(Args...)()
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134 {
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135 string res;
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136 foreach(i, _; Args)
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137 static if (isStringType!(Args[i]))
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138 res ~= "auto _qt_t" ~ __toString(i) ~ " = QString(_t" ~ __toString(i) ~ ");\n";
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139 return res;
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140 }
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