string RenderPartial(Token token, MustacheContext ctx, string indent)
{
string name = token.Name;
if (Partials == null)
{
return(string.Empty);
}
var partial = string.Empty;
if (!Partials.TryGetValue(name, out partial))
{
return(string.Empty);
}
var key = "# partial #" + name + "#" + indent;
if (!Cache.ContainsKey(key))
{
if (string.IsNullOrEmpty(indent))
{
Cache[key] = new MustacheParser().Parse(partial, Delimiter.Default());
}
else
{
var replaced = Regex.Replace(partial, @"^(.+)$", indent + "$1", RegexOptions.Multiline);
Cache[key] = new MustacheParser().Parse(replaced, Delimiter.Default());
}
}
return(RenderTokens(ctx, Cache[key]));
}
string RenderInverted(Token token, MustacheContext ctx)
{
var value = ctx.Lookup(token.Name);
if (value == null && StrictMode)
{
throw new MustacheException(string.Format("lookup failed name:'{0}' around:\n...{1}...\n", token.Name, token.SurroundingTemplate));
}
if (value.ShouldNotRender())
{
return(RenderTokens(ctx, token.Children));
}
return(string.Empty);
}
string RenderName(Token token, MustacheContext ctx, bool escape)
{
var value = ctx.Lookup(token.Name);
if (value == null && StrictMode)
{
throw new MustacheException(string.Format("lookup failed name:'{0}' around:\n...{1}...\n", token.Name, token.SurroundingTemplate));
}
if (value == null)
{
return(string.Empty);
}
if (value.IsLambda())
{
var template = value.InvokeNameLambda() as string;
var tokens = new MustacheParser().Parse(template, Delimiter.Default());
value = RenderTokens(ctx, tokens);
// Recheck for null
if (value == null)
{
return(string.Empty);
}
}
var s = value.ToString();
if (s == "{ }")
{
return(string.Empty);
}
if (escape)
{
return(System.Web.HttpUtility.HtmlEncode(s));
}
return(s);
}
string RenderSection(Token token, MustacheContext ctx)
{
var value = ctx.Lookup(token.Name);
if (value == null && StrictMode)
{
throw new MustacheException(string.Format("lookup failed name:'{0}' around:\n...{1}...\n", token.Name, token.SurroundingTemplate));
}
if (value.ShouldNotRender())
{
return(string.Empty);
}
if (value.IsLambda())
{
var template = value.InvokeSectionLambda(token.SectionTemplate) as string;
if (!string.IsNullOrEmpty(template))
{
if (!Cache.ContainsKey(template))
{
// When Lambdas are used as the data value for Section tag,
// the returned value MUST be rendered against the current delimiters.
Cache[template] = new MustacheParser().Parse(template, token.CurrentDelimiter);
}
return(RenderTokens(ctx, Cache[template]));
}
}
if (value is ICollection)
{
var sb = new StringBuilder();
foreach (object item in value as ICollection)
{
sb.Append(RenderTokens(new MustacheContext(item, ctx), token.Children));
}
return(sb.ToString());
}
return(RenderTokens(new MustacheContext(value, ctx), token.Children));
}
string RenderTokens(MustacheContext ctx, List <Token> tokens)
{
var builder = new StringBuilder();
foreach (var token in tokens)
{
switch (token.Type)
{
case TokenType.SectionOpen:
builder.Append(RenderSection(token, ctx));
break;
case TokenType.InvertedSectionOpen:
builder.Append(RenderInverted(token, ctx));
break;
case TokenType.Partial:
builder.Append(RenderPartial(token, ctx, token.PartialIndent));
break;
case TokenType.Variable:
builder.Append(RenderName(token, ctx, true));
break;
case TokenType.UnescapedVariable:
builder.Append(RenderName(token, ctx, false));
break;
case TokenType.Text:
builder.Append(token.Template, token.StartIndex, token.TextLength);
break;
}
}
return(builder.ToString());
}
/// <summary>
/// Initialize.
/// </summary>
/// <param name="data">The data to be associated with this context.</param>
/// <param name="parent">Parent context.</param>
public MustacheContext(object data, MustacheContext parent)
{
Data = data;
Parent = parent;
}