private JsString(JsString before, JsString after)
{
_before = before;
_after = after;
_nodes = before._nodes + after._nodes + 1;
// Flatten if we're going over the maximum number of nodes.
if (_nodes > MaxNodes)
{
Flatten();
_nodes = 0;
}
}
/// <summary>
/// 15.5.4.3
/// </summary>
/// <param name="target"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public JsInstance ValueOfImpl(JsString target, JsInstance[] parameters) {
return Global.StringClass.New(target.ToString());
}
/// <summary>
/// 15.5.4.3
/// </summary>
/// <param name="target"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public JsInstance ValueOfImpl(JsString target, JsInstance[] parameters)
{
return(Global.StringClass.New(target.ToString()));
}
public static object Concat(JsString left, object right)
{
var rightString = right as string;
if (rightString != null)
return Concat(left, rightString);
var rightJsString = right as JsString;
if (rightJsString != null)
return Concat(left, rightJsString);
return Concat(left, JsValue.ToString(right));
}
public static object Concat(JsString left, JsString right)
{
return new JsString(left, right);
}
private void Flatten()
{
var sb = new StringBuilder();
Flatten(sb, _before);
Flatten(sb, _after);
_value = sb.ToString();
_before = null;
_after = null;
}
private static void Flatten(StringBuilder sb, JsString node)
{
while (true)
{
if (node._value != null)
{
sb.Append(node._value);
break;
}
Flatten(sb, node._before);
node = node._after;
}
}
public static object Concat(object left, JsString right)
{
var leftString = left as string;
if (leftString != null)
return Concat(leftString, right);
var leftJsString = left as JsString;
if (leftJsString != null)
return Concat(leftJsString, right);
return Concat(JsValue.ToString(left), right);
}