// Parse the next path component from a SerializedProperty.propertyPath. For simple field/property access,
// this is just tokenizing on '.' and returning each field/property name. Array/list access is via
// the pseudo-property "Array.data[N]", so this method parses that and returns just the array/list index N.
//
// Call this method repeatedly to access all path components. For example:
//
// string propertyPath = "quests.Array.data[0].goal";
// int i = 0;
// NextPropertyPathToken(propertyPath, ref i, out var component);
// => component = { propertyName = "quests" };
// NextPropertyPathToken(propertyPath, ref i, out var component)
// => component = { elementIndex = 0 };
// NextPropertyPathToken(propertyPath, ref i, out var component)
// => component = { propertyName = "goal" };
// NextPropertyPathToken(propertyPath, ref i, out var component)
// => returns false
private static bool NextPathComponent(string propertyPath, ref int index, out PropertyPathComponent component)
{
component = new PropertyPathComponent();
if (index >= propertyPath.Length)
{
return(false);
}
Match arrayElementMatch = ArrayElementRegex.Match(propertyPath, index);
if (arrayElementMatch.Success)
{
index += arrayElementMatch.Length + 1; // Skip past next '.'
component.elementIndex = int.Parse(arrayElementMatch.Groups[1].Value);
return(true);
}
int dot = propertyPath.IndexOf('.', index);
if (dot == -1)
{
component.propertyName = propertyPath.Substring(index);
index = propertyPath.Length;
}
else
{
component.propertyName = propertyPath.Substring(index, dot - index);
index = dot + 1; // Skip past next '.'
}
return(true);
}
private static void SetPathComponentValue(object container, PropertyPathComponent component, object value)
{
if (component.propertyName == null)
{
((IList)container)[component.elementIndex] = value;
}
else
{
SetMemberValue(container, component.propertyName, value);
}
}
private static object GetPathComponentValue(object container, PropertyPathComponent component)
{
if (component.propertyName == null)
{
return(((IList)container)[component.elementIndex]);
}
else
{
return(GetMemberValue(container, component.propertyName));
}
}
