// 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);
}
}
// Create JSValueObject as a shallow copy of 'other'.
public static JSValueObject CopyFrom(IReadOnlyDictionary <string, JSValue> other)
{
JSValueObject obj = new JSValueObject();
foreach (var keyValue in other)
{
obj.Add(keyValue.Key, keyValue.Value);
}
return(obj);
}
private static JSValueObject InternalReadObjectFrom(IJSValueReader reader)
{
var jsObject = new JSValueObject();
while (reader.GetNextObjectProperty(out string propertyName))
{
jsObject.Add(propertyName, InternalReadFrom(reader));
}
return(jsObject);
}
// Create JSValueObject from IJSValueReader.
public static JSValueObject ReadObjectFrom(IJSValueReader reader)
{
if (reader.ValueType == JSValueType.Object)
{
if (reader is IJSValueTreeReader treeReader)
{
return(JSValueObject.CopyFrom(treeReader.Current.ObjectValue));
}
return(InternalReadObjectFrom(reader));
}
return(new JSValueObject());
}
// Return true if this JSValueObject is strictly equal to 'other'.
public bool Equals(JSValueObject other)
{
return(Equals(this as IReadOnlyDictionary <string, JSValue>, other as IReadOnlyDictionary <string, JSValue>));
}
public static void WriteValue(this IJSValueWriter writer, JSValueObject value)
{
JSValue.WriteObject(writer, value);
}
