public override MurMurVariable VisitMenuBlock([NotNull] MurMurParser.MenuBlockContext context)
{
if (lastChoice == -1) // never visited this menu
{
script.CurrentLine = new MurMurLine()
{
Type = MurMurLineType.menu,
Text = ""
};
var expression = context.menuCommand().expression();
if (expression != null)
{
script.CurrentLine.Text = Visit(expression).Text;
}
List <string> options = new List <string>();
availableOptions = new List <MurMurParser.MenuSubBlockContext>();
foreach (var item in context.menuSubBlock())
{
var expressions = item.menuOptionCommand().expression();
bool shouldIncludeOption;
if (expressions.Length > 1) // Option has a condition
{
var condition = expressions[1];
shouldIncludeOption = (condition == null || Visit(condition).Boolean);
}
else // This option is always true
{
shouldIncludeOption = true;
}
options.Add(Visit(item.menuOptionCommand().expression()[0]).Text);
availableOptions.Add(item);
}
script.CurrentLine.OptionsText = options.ToArray();
currentStack.Push(context);
return(new MurMurVariable()
{
Halt = context
});
}
else // We've been here before, let's run a submenu block
{
var block = availableOptions[lastChoice];
availableOptions = null;
lastChoice = -1;
if (block.block() != null)
{
return(Visit(block.block()));
}
else // Empty menu subblock, let's skip ahead
{
script.CurrentLine = new MurMurLine()
{
Type = MurMurLineType.empty,
};
return(new MurMurVariable());
}
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="MurMurParser.menuBlock"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitMenuBlock([NotNull] MurMurParser.MenuBlockContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="MurMurParser.menuBlock"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitMenuBlock([NotNull] MurMurParser.MenuBlockContext context)
{
}
