// Return true if this JSValue is strictly equal to JSValue after they are converted to the same type.
//
// Null is not converted to any other type before comparison.
// Object and Array types are converted first to a String type using AsString() before comparing
// with other types, and then we apply the same rules as for the String type.
// String is converted to Double before comparing with Boolean, Int64, or Double.
// Boolean is converted to 1.0 and +0.0 when comparing with String, Int64, or Double.
// Int64 is converted to Double before comparing with other types.
//
// The behavior is similar to JavaScript == operator except for Object and Array for which
// this functions does a deep structured comparison using JSEquals instead
// of pointer equality.
public bool JSEquals(JSValue other)
{
if (Type == other.Type)
{
switch (Type)
{
case JSValueType.Object:
return(JSValueObject.JSEquals(ObjectValue, other.ObjectValue));
case JSValueType.Array:
return(JSValueArray.JSEquals(ArrayValue, other.ArrayValue));
default:
return(Equals(other));
}
}
else if (Type == JSValueType.Null || other.Type == JSValueType.Null)
{
return(false);
}
// If one of the types Boolean, Int64, or Double, then compare as Numbers,
// otherwise compare as strings.
JSValueType greatestType = Type > other.Type ? Type : other.Type;
if (greatestType >= JSValueType.Boolean)
{
return(AsJSNumber() == other.AsJSNumber());
}
else
{
return(AsJSString() == other.AsJSString());
}
}
// Return true if this JSValue is strictly equal to JSValue.
// Compared values must have the same type and value.
//
// The behavior is similar to JavaScript === operator except for Object and Array where
// this functions does a deep structured comparison instead of pointer equality.
public bool Equals(JSValue other)
{
if (Type != other.Type)
{
return(false);
}
switch (Type)
{
case JSValueType.Null: return(true);
case JSValueType.Object: return(JSValueObject.Equals(ObjectValue, other.ObjectValue));
case JSValueType.Array: return(JSValueArray.Equals(ArrayValue, other.ArrayValue));
case JSValueType.String: return(StringValue == other.StringValue);
case JSValueType.Boolean: return(BooleanValue == other.BooleanValue);
case JSValueType.Int64: return(Int64Value == other.Int64Value);
case JSValueType.Double: return(DoubleValue == other.DoubleValue);
default: return(false);
}
}
public static JSValueArray CopyFrom(IReadOnlyList <JSValue> other)
{
JSValueArray arr = new JSValueArray();
foreach (var item in other)
{
arr.Add(item);
}
return(arr);
}
private static JSValueArray InternalReadArrayFrom(IJSValueReader reader)
{
var jsArray = new JSValueArray();
while (reader.GetNextArrayItem())
{
jsArray.Add(InternalReadFrom(reader));
}
return(jsArray);
}
// Create JSValueArray from IJSValueReader.
public static JSValueArray ReadArrayFrom(IJSValueReader reader)
{
if (reader.ValueType == JSValueType.Array)
{
if (reader is IJSValueTreeReader treeReader)
{
return(JSValueArray.CopyFrom(treeReader.Current.ArrayValue));
}
return(InternalReadArrayFrom(reader));
}
return(new JSValueArray());
}
// Return true if this JSValueArray is strictly equal to 'other'.
public bool Equals(JSValueArray other)
{
return(Equals(this as IReadOnlyList <JSValue>, other as IReadOnlyList <JSValue>));
}
