private bool IsLiteralAttributeValue(SyntaxTreeNode node)
{
if (node.IsBlock)
{
return false;
}
var span = node as Span;
Debug.Assert(span != null);
var litGen = span.ChunkGenerator as LiteralAttributeChunkGenerator;
return span != null &&
((litGen != null && litGen.ValueGenerator == null) ||
span.ChunkGenerator == SpanChunkGenerator.Null ||
span.ChunkGenerator is MarkupChunkGenerator);
}
public Block TagHelperBlock(
string tagName,
TagMode tagMode,
SourceLocation start,
Block startTag,
SyntaxTreeNode[] children,
Block endTag)
{
var builder = new TagHelperBlockBuilder(
tagName,
tagMode,
attributes: new List<TagHelperAttributeNode>(),
children: children)
{
Start = start,
SourceStartTag = startTag,
SourceEndTag = endTag
};
return builder.Build();
}
private static void AddNullActualError(ErrorCollector collector, SyntaxTreeNode actual, SyntaxTreeNode expected)
{
collector.AddError("{0} - FAILED :: Actual: << Null >>", expected);
}
private static void AddMismatchError(ErrorCollector collector, SyntaxTreeNode actual, SyntaxTreeNode expected)
{
collector.AddError("{0} - FAILED :: Actual: {1}", expected, actual);
}
private static void AddPassedMessage(ErrorCollector collector, SyntaxTreeNode expected)
{
collector.AddMessage("{0} - PASSED", expected);
}
private static void EvaluateSyntaxTreeNode(ErrorCollector collector, SyntaxTreeNode actual, SyntaxTreeNode expected)
{
if (actual == null)
{
AddNullActualError(collector, actual, expected);
return;
}
if (actual.IsBlock != expected.IsBlock)
{
AddMismatchError(collector, actual, expected);
}
else
{
if (expected.IsBlock)
{
EvaluateBlock(collector, (Block)actual, (Block)expected);
}
else
{
EvaluateSpan(collector, (Span)actual, (Span)expected);
}
}
}
private void WriteNode(int indent, SyntaxTreeNode node)
{
var content = node.ToString().Replace("\r", "\\r")
.Replace("\n", "\\n")
.Replace("{", "{{")
.Replace("}", "}}");
if (indent > 0)
{
content = new String('.', indent * 2) + content;
}
WriteTraceLine(content);
var block = node as Block;
if (block != null)
{
foreach (SyntaxTreeNode child in block.Children)
{
WriteNode(indent + 1, child);
}
}
}
private static bool IsNullOrWhitespaceAttributeValue(SyntaxTreeNode attributeValue)
{
if (attributeValue.IsBlock)
{
foreach (var span in ((Block)attributeValue).Flatten())
{
if (!string.IsNullOrWhiteSpace(span.Content))
{
return false;
}
}
return true;
}
else
{
return string.IsNullOrWhiteSpace(((Span)attributeValue).Content);
}
}
private static SourceLocation GetAttributeNameStartLocation(SyntaxTreeNode node)
{
Span span;
var nodeStart = SourceLocation.Undefined;
if (node.IsBlock)
{
span = ((Block)node).FindFirstDescendentSpan();
nodeStart = span.Parent.Start;
}
else
{
span = (Span)node;
nodeStart = span.Start;
}
// Span should never be null here, this should only ever be called if an attribute was successfully parsed.
Debug.Assert(span != null);
// Attributes must have at least one non-whitespace character to represent the tagName (even if its a C#
// expression).
var firstNonWhitespaceSymbol = span
.Symbols
.OfType<HtmlSymbol>()
.First(sym => sym.Type != HtmlSymbolType.WhiteSpace && sym.Type != HtmlSymbolType.NewLine);
return nodeStart + firstNonWhitespaceSymbol.Start;
}
public CSharpCodeWriter WriteStartInstrumentationContext(
ChunkGeneratorContext context,
SyntaxTreeNode syntaxNode,
bool isLiteral)
{
return WriteStartInstrumentationContext(
context,
syntaxNode.Start.AbsoluteIndex,
syntaxNode.Length,
isLiteral);
}
/// <summary>
/// Checks that the specified span is equivalent to the other in that it has the same start point and content.
/// </summary>
public override bool EquivalentTo(SyntaxTreeNode node)
{
var other = node as Span;
return other != null &&
Kind.Equals(other.Kind) &&
Start.Equals(other.Start) &&
EditHandler.Equals(other.EditHandler) &&
string.Equals(other.Content, Content, StringComparison.Ordinal);
}
public override bool EquivalentTo(SyntaxTreeNode node)
{
var other = node as Block;
if (other == null || other.Type != Type)
{
return false;
}
return Enumerable.SequenceEqual(Children, other.Children, new EquivalenceComparer());
}
