internal static void Accept(ISelectable selectable, StylesheetStatement statement)
{
if (selectable == null)
{
return;
}
switch (statement)
{
case AssignmentStatement assignment:
if (selectable is IStyleable styleable)
{
styleable.Set(assignment.Key, assignment.Value);
}
break;
case StyleDeclaration style:
SelectorHelper.Visit(selectable, style.Selector, (current, discard1, discard2) =>
{
foreach (var localStatement in style.Statements)
{
Accept(current, localStatement);
}
});
break;
default:
throw new NotSupportedException();
}
}
private static string Serialize(string id, StylesheetStatement statement)
{
switch (statement)
{
case AssignmentStatement assignment:
return($"__set__(__root__, {JsonConvert.SerializeObject(assignment.Key)}, {JsonConvert.SerializeObject(assignment.Value)});");
case ScriptDeclaration scriptDeclaration:
return(scriptDeclaration.Script);
case StyleDeclaration style:
if (!style.ContainsScripts())
{
return($"__rule__(__root__, '{id}');");
}
var predicates = new List <string>();
var num = 0;
string Replace(ScriptSelector script)
{
predicates.Add($@"function () {{ return !!({script.Expression}); }}");
return($"<{{{num++}}}>");
}
return($@"__visit__(__root__, {JsonConvert.SerializeObject(style.Selector.Serialize(Replace))}, function (__root__) {{
{string.Join("\n", style.Statements.Select((s, i) => Serialize(id + "." + i, s)))}
}}, [{string.Join(", ", predicates)}]);");
default:
throw new ArgumentOutOfRangeException();
}
}
public void VisitRule(object root, string id)
{
var parts = id.Split('.').Select(int.Parse).ToArray();
StylesheetStatement current = stylesheet.Declarations[parts[0]];
for (var i = 1; i < parts.Length; i++)
{
current = ((StyleDeclaration)current).Statements[parts[i]];
}
SimpleStylesheet.Accept(asSelectable(root), current);
}