protected override void Visit(ExpressionBlockChunk chunk)
{
var firstChildExpression = chunk.Children.FirstOrDefault() as ExpressionChunk;
var padding = 0;
MappingLocation documentLocation = null;
if (firstChildExpression != null)
{
padding = _paddingBuilder.CalculateExpressionPadding((Span)firstChildExpression.Association);
documentLocation = CreateMappingLocation(firstChildExpression.Start, firstChildExpression.Code.Length);
}
var expressionBlock = new CSharpBlock();
using (_context.Builder.UseBlock(expressionBlock))
{
Accept(chunk.Children);
}
var renderExpression = new RenderExpression
{
Expression = expressionBlock,
Padding = padding,
DocumentLocation = documentLocation
};
_context.Builder.Add(renderExpression);
}
protected override void Visit(RazorDirectiveChunk chunk)
{
var tokensBlock = new CSharpBlock();
using (_context.Builder.UseBlock(tokensBlock))
{
Accept(chunk.Children);
}
IRazorDirective directive;
var tokens = tokensBlock.Children.OfType <RazorDirectiveToken>().ToList();
if (chunk.Descriptor.Type == RazorDirectiveDescriptorType.SingleLine)
{
directive = new RazorSingleLineDirective()
{
Name = chunk.Name,
Tokens = tokens,
};
}
else
{
var directiveChildren = tokensBlock.Children.Except(tokens);
var directiveBlock = new RazorBlockDirective()
{
Name = chunk.Name,
Tokens = tokens,
};
directiveBlock.Children.AddRange(directiveChildren);
directive = directiveBlock;
}
_context.Builder.Add(directive);
}
public IDisposable UseBlock(CSharpBlock csharpBlock)
{
_activeScopes.Push(csharpBlock);
var builderScope = new BlockBuilderScope(_endBlock);
return(builderScope);
}
public void Walk(CSharpBlock block)
{
for (var i = 0; i < block.Children.Count; i++)
{
var literal = false;
MappingLocation mappingLocation = null;
var current = block.Children[i];
if (current is CSharpBlock)
{
Walk((CSharpBlock)current);
}
else if (current is RenderHtml)
{
var renderHtml = current as RenderHtml;
literal = true;
mappingLocation = renderHtml.DocumentLocation;
}
else if (current is RenderExpression)
{
var renderExpression = current as RenderExpression;
literal = false;
mappingLocation = renderExpression.DocumentLocation;
}
else if (current is ExecuteTagHelpers)
{
Debug.Assert(block is RenderTagHelper);
var renderTagHelper = block as RenderTagHelper;
var executeTagHelpers = current as ExecuteTagHelpers;
literal = false;
mappingLocation = renderTagHelper.DocumentLocation;
}
if (mappingLocation != null)
{
var beginInstrumentation = new BeginInstrumentation
{
DocumentLocation = mappingLocation,
Literal = literal,
};
block.Children.Insert(i, beginInstrumentation);
var endInstrumentation = new EndInstrumentation();
block.Children.Insert(i + 2, endInstrumentation);
i += 2;
mappingLocation = null;
}
}
}
protected override void Visit(DynamicCodeAttributeChunk chunk)
{
var value = new CSharpBlock();
using (_context.Builder.UseBlock(value))
{
Accept(chunk.Children);
}
var attributePiece = new ConditionalAttributePiece
{
DocumentLocation = CreateMappingLocation(chunk.Start, chunk.Association.Length),
Prefix = chunk.Prefix,
Value = value
};
_context.Builder.Add(attributePiece);
}
protected override void Visit(CodeAttributeChunk chunk)
{
var valueBlock = new CSharpBlock();
using (_context.Builder.UseBlock(valueBlock))
{
Accept(chunk.Children);
}
var attribute = new RenderConditionalAttribute
{
DocumentLocation = CreateMappingLocation(chunk.Start, chunk.Association.Length),
Name = chunk.Attribute,
Prefix = chunk.Prefix,
ValuePieces = valueBlock.Children,
Suffix = chunk.Suffix,
};
_context.Builder.Add(attribute);
}
public void Walk(CSharpBlock block)
{
for (var i = 0; i < block.Children.Count; i++)
{
var current = block.Children[i];
if (current is ViewClassDeclaration)
{
_classDeclaration = (ViewClassDeclaration)current;
_variableCountOffset = _classDeclaration.Children.Count;
}
if (current is CSharpBlock && !(current is RenderTagHelper))
{
Walk((CSharpBlock)current);
}
else
{
WalkSource(current);
}
}
}
private static ViewClassDeclaration FindClassDeclaration(CSharpBlock block)
{
if (block is ViewClassDeclaration)
{
return((ViewClassDeclaration)block);
}
for (var i = 0; i < block.Children.Count; i++)
{
var currentBlock = block.Children[i] as CSharpBlock;
if (currentBlock == null)
{
continue;
}
var classDeclaration = FindClassDeclaration(currentBlock);
if (classDeclaration != null)
{
return(classDeclaration);
}
}
return(null);
}
private void AddTagHelperAttributes(IList <TagHelperAttributeTracker> attributes, IEnumerable <TagHelperDescriptor> descriptors)
{
var renderedBoundAttributeNames = new HashSet <string>(StringComparer.OrdinalIgnoreCase);
foreach (var attribute in attributes)
{
var attributeValueChunk = attribute.Value;
var associatedDescriptors = descriptors.Where(descriptor =>
descriptor.Attributes.Any(attributeDescriptor => attributeDescriptor.IsNameMatch(attribute.Name)));
if (associatedDescriptors.Any() && renderedBoundAttributeNames.Add(attribute.Name))
{
if (attributeValueChunk == null)
{
// Minimized attributes are not valid for bound attributes. TagHelperBlockRewriter has already
// logged an error if it was a bound attribute; so we can skip.
continue;
}
foreach (var associatedDescriptor in associatedDescriptors)
{
var valueBlock = new CSharpBlock();
using (_context.Builder.UseBlock(valueBlock))
{
Accept(attribute.Value);
}
var associatedAttributeDescriptor = associatedDescriptor.Attributes.First(
attributeDescriptor => attributeDescriptor.IsNameMatch(attribute.Name));
var associationBlock = attribute.Value.Association as Block;
var documentLocation = attribute.Value.Start; // TODO: Do we need to handle @ at the beginning of non-string TH attributes?
var contentLength = attribute.Value.Association.Length;
var setTagHelperProperty = new SetTagHelperProperty
{
PropertyName = associatedAttributeDescriptor.PropertyName,
AttributeName = attribute.Name,
TagHelperTypeName = associatedDescriptor.TypeName,
Value = valueBlock,
DocumentLocation = CreateMappingLocation(documentLocation, contentLength),
AssociatedDescriptor = associatedAttributeDescriptor,
ValueStyle = attribute.ValueStyle
};
_context.Builder.Add(setTagHelperProperty);
}
}
else
{
var addHtmlAttribute = new AddTagHelperHtmlAttribute
{
Name = attribute.Name,
ValueStyle = attribute.ValueStyle
};
if (attributeValueChunk != null)
{
var valueBlock = new CSharpBlock();
using (_context.Builder.UseBlock(valueBlock))
{
Accept(attribute.Value);
}
addHtmlAttribute.ValuePieces = valueBlock.Children;
}
_context.Builder.Add(addHtmlAttribute);
}
}
}
