gitee.com/quant1x/pkg@v0.2.8/goja/builtin_reflect.go (about)

     1  package goja
     2  
     3  func (r *Runtime) builtin_reflect_apply(call FunctionCall) Value {
     4  	return r.toCallable(call.Argument(0))(FunctionCall{
     5  		This:      call.Argument(1),
     6  		Arguments: r.createListFromArrayLike(call.Argument(2))})
     7  }
     8  
     9  func (r *Runtime) toConstructor(v Value) func(args []Value, newTarget *Object) *Object {
    10  	if ctor := r.toObject(v).self.assertConstructor(); ctor != nil {
    11  		return ctor
    12  	}
    13  	panic(r.NewTypeError("Value is not a constructor"))
    14  }
    15  
    16  func (r *Runtime) builtin_reflect_construct(call FunctionCall) Value {
    17  	target := call.Argument(0)
    18  	ctor := r.toConstructor(target)
    19  	var newTarget Value
    20  	if len(call.Arguments) > 2 {
    21  		newTarget = call.Argument(2)
    22  		r.toConstructor(newTarget)
    23  	} else {
    24  		newTarget = target
    25  	}
    26  	return ctor(r.createListFromArrayLike(call.Argument(1)), r.toObject(newTarget))
    27  }
    28  
    29  func (r *Runtime) builtin_reflect_defineProperty(call FunctionCall) Value {
    30  	target := r.toObject(call.Argument(0))
    31  	key := toPropertyKey(call.Argument(1))
    32  	desc := r.toPropertyDescriptor(call.Argument(2))
    33  
    34  	return r.toBoolean(target.defineOwnProperty(key, desc, false))
    35  }
    36  
    37  func (r *Runtime) builtin_reflect_deleteProperty(call FunctionCall) Value {
    38  	target := r.toObject(call.Argument(0))
    39  	key := toPropertyKey(call.Argument(1))
    40  
    41  	return r.toBoolean(target.delete(key, false))
    42  }
    43  
    44  func (r *Runtime) builtin_reflect_get(call FunctionCall) Value {
    45  	target := r.toObject(call.Argument(0))
    46  	key := toPropertyKey(call.Argument(1))
    47  	var receiver Value
    48  	if len(call.Arguments) > 2 {
    49  		receiver = call.Arguments[2]
    50  	}
    51  	return target.get(key, receiver)
    52  }
    53  
    54  func (r *Runtime) builtin_reflect_getOwnPropertyDescriptor(call FunctionCall) Value {
    55  	target := r.toObject(call.Argument(0))
    56  	key := toPropertyKey(call.Argument(1))
    57  	return r.valuePropToDescriptorObject(target.getOwnProp(key))
    58  }
    59  
    60  func (r *Runtime) builtin_reflect_getPrototypeOf(call FunctionCall) Value {
    61  	target := r.toObject(call.Argument(0))
    62  	if proto := target.self.proto(); proto != nil {
    63  		return proto
    64  	}
    65  
    66  	return _null
    67  }
    68  
    69  func (r *Runtime) builtin_reflect_has(call FunctionCall) Value {
    70  	target := r.toObject(call.Argument(0))
    71  	key := toPropertyKey(call.Argument(1))
    72  	return r.toBoolean(target.hasProperty(key))
    73  }
    74  
    75  func (r *Runtime) builtin_reflect_isExtensible(call FunctionCall) Value {
    76  	target := r.toObject(call.Argument(0))
    77  	return r.toBoolean(target.self.isExtensible())
    78  }
    79  
    80  func (r *Runtime) builtin_reflect_ownKeys(call FunctionCall) Value {
    81  	target := r.toObject(call.Argument(0))
    82  	return r.newArrayValues(target.self.keys(true, nil))
    83  }
    84  
    85  func (r *Runtime) builtin_reflect_preventExtensions(call FunctionCall) Value {
    86  	target := r.toObject(call.Argument(0))
    87  	return r.toBoolean(target.self.preventExtensions(false))
    88  }
    89  
    90  func (r *Runtime) builtin_reflect_set(call FunctionCall) Value {
    91  	target := r.toObject(call.Argument(0))
    92  	var receiver Value
    93  	if len(call.Arguments) >= 4 {
    94  		receiver = call.Argument(3)
    95  	} else {
    96  		receiver = target
    97  	}
    98  	return r.toBoolean(target.set(call.Argument(1), call.Argument(2), receiver, false))
    99  }
   100  
   101  func (r *Runtime) builtin_reflect_setPrototypeOf(call FunctionCall) Value {
   102  	target := r.toObject(call.Argument(0))
   103  	var proto *Object
   104  	if arg := call.Argument(1); arg != _null {
   105  		proto = r.toObject(arg)
   106  	}
   107  	return r.toBoolean(target.self.setProto(proto, false))
   108  }
   109  
   110  func (r *Runtime) createReflect(val *Object) objectImpl {
   111  	o := newBaseObjectObj(val, r.global.ObjectPrototype, classObject)
   112  
   113  	o._putProp("apply", r.newNativeFunc(r.builtin_reflect_apply, "apply", 3), true, false, true)
   114  	o._putProp("construct", r.newNativeFunc(r.builtin_reflect_construct, "construct", 2), true, false, true)
   115  	o._putProp("defineProperty", r.newNativeFunc(r.builtin_reflect_defineProperty, "defineProperty", 3), true, false, true)
   116  	o._putProp("deleteProperty", r.newNativeFunc(r.builtin_reflect_deleteProperty, "deleteProperty", 2), true, false, true)
   117  	o._putProp("get", r.newNativeFunc(r.builtin_reflect_get, "get", 2), true, false, true)
   118  	o._putProp("getOwnPropertyDescriptor", r.newNativeFunc(r.builtin_reflect_getOwnPropertyDescriptor, "getOwnPropertyDescriptor", 2), true, false, true)
   119  	o._putProp("getPrototypeOf", r.newNativeFunc(r.builtin_reflect_getPrototypeOf, "getPrototypeOf", 1), true, false, true)
   120  	o._putProp("has", r.newNativeFunc(r.builtin_reflect_has, "has", 2), true, false, true)
   121  	o._putProp("isExtensible", r.newNativeFunc(r.builtin_reflect_isExtensible, "isExtensible", 1), true, false, true)
   122  	o._putProp("ownKeys", r.newNativeFunc(r.builtin_reflect_ownKeys, "ownKeys", 1), true, false, true)
   123  	o._putProp("preventExtensions", r.newNativeFunc(r.builtin_reflect_preventExtensions, "preventExtensions", 1), true, false, true)
   124  	o._putProp("set", r.newNativeFunc(r.builtin_reflect_set, "set", 3), true, false, true)
   125  	o._putProp("setPrototypeOf", r.newNativeFunc(r.builtin_reflect_setPrototypeOf, "setPrototypeOf", 2), true, false, true)
   126  
   127  	o._putSym(SymToStringTag, valueProp(asciiString("Reflect"), false, false, true))
   128  
   129  	return o
   130  }
   131  
   132  func (r *Runtime) getReflect() *Object {
   133  	ret := r.global.Reflect
   134  	if ret == nil {
   135  		ret = &Object{runtime: r}
   136  		r.global.Reflect = ret
   137  		ret.self = r.createReflect(ret)
   138  	}
   139  	return ret
   140  }