// {{#if ...}}
// ^
public static ReadOnlyMemory <char> ParseTemplateScriptBlock(this ReadOnlyMemory <char> literal, ScriptContext context, out PageBlockFragment blockFragment)
{
literal = literal.ParseVarName(out var blockNameSpan);
PageBlockFragment statement;
var blockName = blockNameSpan.ToString();
var endBlock = "{{/" + blockName + "}}";
var endExprPos = literal.IndexOf("}}");
if (endExprPos == -1)
{
throw new SyntaxErrorException($"Unterminated '{blockName}' block expression, near '{literal.DebugLiteral()}'");
}
var argument = literal.Slice(0, endExprPos).Trim();
literal = literal.Advance(endExprPos + 2);
var language = context.ParseAsLanguage.TryGetValue(blockName, out var lang)
? lang
: ScriptTemplate.Language;
if (language.Name == ScriptVerbatim.Language.Name)
{
var endBlockPos = literal.IndexOf(endBlock);
if (endBlockPos == -1)
{
throw new SyntaxErrorException($"Unterminated end block '{endBlock}'");
}
var body = literal.Slice(0, endBlockPos);
literal = literal.Advance(endBlockPos + endBlock.Length).TrimFirstNewLine();
blockFragment = language.ParseVerbatimBlock(blockName, argument, body);
return(literal);
}
literal = literal.ParseTemplateBody(blockNameSpan, out var bodyText);
var bodyFragments = language.Parse(context, bodyText);
var elseBlocks = new List <PageElseBlock>();
while (literal.StartsWith("{{else"))
{
literal = literal.ParseTemplateElseBlock(blockName, out var elseArgument, out var elseBody);
var elseBlock = new PageElseBlock(elseArgument, language.Parse(context, elseBody));
elseBlocks.Add(elseBlock);
}
literal = literal.Advance(2 + 1 + blockName.Length + 2);
//remove new line after partial block end tag
literal = literal.TrimFirstNewLine();
blockFragment = new PageBlockFragment(blockName, argument, bodyFragments, elseBlocks);
return(literal);
}
// {{#if ...}}
// ^
public static ReadOnlyMemory <char> ParseTemplateScriptBlock(this ReadOnlyMemory <char> literal, ScriptContext context, out PageBlockFragment blockFragment)
{
literal = literal.ParseVarName(out var blockNameSpan);
PageBlockFragment statement;
var blockName = blockNameSpan.ToString();
var endBlock = "{{/" + blockName + "}}";
var endExprPos = literal.IndexOf("}}");
if (endExprPos == -1)
{
throw new SyntaxErrorException($"Unterminated '{blockName}' block expression, near '{literal.DebugLiteral()}'");
}
var blockExpr = literal.Slice(0, endExprPos).Trim();
literal = literal.Advance(endExprPos + 2);
if (context.ParseAsVerbatimBlock.Contains(blockName))
{
var endBlockPos = literal.IndexOf(endBlock);
if (endBlockPos == -1)
{
throw new SyntaxErrorException($"Unterminated end block '{endBlock}'");
}
var blockBody = literal.Slice(0, endBlockPos);
literal = literal.Advance(endBlockPos + endBlock.Length).TrimFirstNewLine();
var body = new List <PageFragment> {
new PageStringFragment(blockBody)
};
blockFragment = new PageBlockFragment(blockName, blockExpr, body);
return(literal);
}
else
{
var parseAsCode = context.ParseAsCodeBlock.Contains(blockName);
literal = literal.ParseTemplateBody(blockNameSpan, out var bodyText);
List <PageFragment> bodyFragments = null;
JsBlockStatement bodyStatements = null;
if (!parseAsCode)
{
bodyFragments = context.ParseTemplate(bodyText);
}
else
{
bodyStatements = context.ParseCode(bodyText);
}
var elseBlocks = new List <PageElseBlock>();
while (literal.StartsWith("{{else"))
{
literal = literal.ParseTemplateElseBlock(blockName, out var elseArgument, out var elseBody);
var elseBlock = !parseAsCode
? new PageElseBlock(elseArgument, context.ParseTemplate(elseBody))
: new PageElseBlock(elseArgument, context.ParseCode(elseBody));
elseBlocks.Add(elseBlock);
}
literal = literal.Advance(2 + 1 + blockName.Length + 2);
//remove new line after partial block end tag
literal = literal.TrimFirstNewLine();
blockFragment = !parseAsCode
? new PageBlockFragment(blockName, blockExpr, bodyFragments, elseBlocks)
: new PageBlockFragment(blockName, blockExpr, bodyStatements, elseBlocks);
return(literal);
}
}