|
public static Statement ( |
||
| body | ||
| isEscaped | bool | |
| trimBefore | bool | |
| trimAfter | bool | |
| return | HandlebarsDotNet.Compiler.StatementExpression | |
public override Expression GetAccumulatedBlock()
{
if (_accumulatedBody == null)
{
_accumulatedBody = GetBlockBody();
_accumulatedInversion = Expression.Block(Expression.Empty());
}
else if (_accumulatedInversion == null)
{
_accumulatedInversion = GetBlockBody();
}
var resultExpr = HandlebarsExpression.BlockHelper(
_startingNode.HelperName,
_startingNode.Arguments.Where(o => o.NodeType != (ExpressionType)HandlebarsExpressionType.BlockParamsExpression),
_startingNode.Arguments.OfType <BlockParamsExpression>().SingleOrDefault() ?? BlockParamsExpression.Empty(),
_accumulatedBody,
_accumulatedInversion,
_startingNode.IsRaw);
if (_startingNode.IsRaw)
{
return(HandlebarsExpression.Statement(
resultExpr,
false,
_trimBefore,
_trimAfter));
}
return(resultExpr);
}
public override Expression GetAccumulatedBlock()
{
if (_accumulatedBody == null)
{
_accumulatedBody = GetBlockBody();
_accumulatedInversion = Expression.Block(Expression.Empty());
}
else if (_accumulatedInversion == null)
{
_accumulatedInversion = GetBlockBody();
}
var resultExpr = HandlebarsExpression.BlockHelper(
_startingNode.HelperName,
_startingNode.Arguments,
_accumulatedBody,
_accumulatedInversion,
_startingNode.IsRaw);
if (_startingNode.IsRaw)
{
return(HandlebarsExpression.Statement(
resultExpr,
false,
_trimBefore,
_trimAfter));
}
return(resultExpr);
}
protected virtual Expression VisitStatementExpression(StatementExpression sex)
{
Expression body = Visit(sex.Body);
if (body != sex.Body)
{
return(HandlebarsExpression.Statement(body, sex.IsEscaped, sex.TrimBefore, sex.TrimAfter));
}
return(sex);
}
public override IEnumerable <object> ConvertTokens(IEnumerable <object> sequence)
{
var enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
var item = enumerator.Current;
var startExpression = item as StartExpressionToken;
if (startExpression == null)
{
yield return(item);
continue;
}
var possibleBody = GetNext(enumerator);
if (!(possibleBody is Expression))
{
throw new HandlebarsCompilerException(String.Format("Token '{0}' could not be converted to an expression", possibleBody));
}
var endExpression = GetNext(enumerator) as EndExpressionToken;
if (endExpression == null)
{
throw new HandlebarsCompilerException("Handlebars statement was not reduced to a single expression");
}
if (endExpression.IsEscaped != startExpression.IsEscaped)
{
throw new HandlebarsCompilerException("Starting and ending handlebars do not match");
}
yield return(HandlebarsExpression.Statement(
(Expression)possibleBody,
startExpression.IsEscaped,
startExpression.TrimPreceedingWhitespace,
endExpression.TrimTrailingWhitespace));
}
}
public override IEnumerable <object> ConvertTokens(IEnumerable <object> sequence)
{
var enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
var item = enumerator.Current;
if (item is StartExpressionToken)
{
var startExpression = item as StartExpressionToken;
item = GetNext(enumerator);
if ((item is Expression) == false)
{
throw new HandlebarsCompilerException(
string.Format("Token '{0}' could not be converted to an expression", item));
}
yield return(HandlebarsExpression.Statement(
(Expression)item,
startExpression.IsEscaped));
item = GetNext(enumerator);
if ((item is EndExpressionToken) == false)
{
throw new HandlebarsCompilerException("Handlebars statement was not reduced to a single expression");
}
if (((EndExpressionToken)item).IsEscaped != startExpression.IsEscaped)
{
throw new HandlebarsCompilerException("Starting and ending handleabars do not match");
}
}
else
{
yield return(item);
}
}
}