/// <summary>
/// Writes many expressions isolated from outer and inner operations by opening, closing and separator characters.
/// </summary>
/// <param name="context">The Javascript conversion context.</param>
/// <param name="opening">First character to render, isolating from outer operation.</param>
/// <param name="closing">Last character to render, isolating from outer operation.</param>
/// <param name="separator">Separator character to render, isolating one parameter from the other.</param>
/// <param name="nodes">Nodes to render.</param>
public static JavascriptConversionContext WriteManyIsolated(
this JavascriptConversionContext context,
char opening,
char closing,
char separator,
IEnumerable <Expression> nodes)
{
var writer = context.GetWriter();
writer.Write(opening);
using (writer.Operation(0))
context.WriteMany(separator, nodes);
writer.Write(closing);
return(context);
}
public override void ConvertToJavascript(JavascriptConversionContext context)
{
var methodCall = context.Node as MethodCallExpression;
if (methodCall != null)
{
if (methodCall.Method.DeclaringType == typeof(string))
{
switch (methodCall.Method.Name)
{
case "Concat":
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Concat))
{
if (methodCall.Arguments.Count == 0)
{
writer.Write("''");
}
else
{
if (GetTypeOfExpression(methodCall.Arguments[0]) != typeof(string))
{
writer.Write("''+");
}
context.WriteMany('+', methodCall.Arguments);
}
}
return;
}
case "Join":
{
context.PreventDefault();
var writer = context.GetWriter();
using (writer.Operation(JavascriptOperationTypes.Call))
{
using (writer.Operation(JavascriptOperationTypes.IndexerProperty))
{
var pars = methodCall.Method.GetParameters();
if (pars.Length == 4 && pars[1].ParameterType.IsArray && pars[2].ParameterType == typeof(int) && pars[3].ParameterType == typeof(int))
{
throw new NotSupportedException("The `String.Join` method with start and count paramaters is not supported.");
}
if (pars.Length != 2 || !TypeHelpers.IsEnumerableType(pars[1].ParameterType))
{
throw new NotSupportedException("This `String.Join` method is not supported.");
}
// if second parameter is an enumerable, render it directly
context.Visitor.Visit(methodCall.Arguments[1]);
writer.Write(".join");
}
writer.Write('(');
// separator
using (writer.Operation(0))
context.Visitor.Visit(methodCall.Arguments[0]);
writer.Write(')');
}
return;
}
}
}
}
}
