protected AcceptedCharacters AcceptDottedExpression(bool isWithinCode, bool expectIdentifierFirst, params char[] allowedBrackets)
{
if (!expectIdentifierFirst || ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
do
{
// Parse Parentheses or Brackets if we see them
do
{
if (!allowedBrackets.Any(c => CurrentCharacter == c))
{
break;
}
// Dev10 884975 - Incorrect Error Messaging
SourceLocation bracketStart = CurrentLocation;
char bracket = CurrentCharacter;
if (!BalanceBrackets(allowTransition: true, spanFactory: CreateImplicitExpressionSpanFactory(isWithinCode)))
{
// Balancing terminated because of EOF
char terminator = _bracketPairs[bracket];
Context.AcceptCurrent();
TryRecover(RecoveryModes.Any);
OnError(bracketStart, RazorResources.ParseError_Expected_CloseBracket_Before_EOF, bracket, terminator);
return(AcceptedCharacters.Any);
}
} while (!EndOfFile);
// If the next character is a dot, followed by an identifier start, keep on parsing
using (Context.StartTemporaryBuffer()) {
if (CurrentCharacter != '.')
{
break;
}
Context.AcceptCurrent();
if (!ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
if (isWithinCode)
{
Context.AcceptTemporaryBuffer();
}
break;
}
Context.AcceptTemporaryBuffer(); // Put the dot in the primary buffer
}
// Parse an identifier
Context.AcceptIdentifier();
} while (!EndOfFile);
}
return(AcceptedCharacters.NonWhiteSpace);
}
protected virtual void AcceptWhiteSpaceByLines()
{
Debug.Assert(InTemporaryBuffer);
// Eat whitespace until a non-whitespace character,
while (Char.IsWhiteSpace(CurrentCharacter))
{
Context.AcceptWhiteSpace(includeNewLines: false);
// Stopped because of a newline, so accept the newline, then accept the temporary buffer and start it again
if (Char.IsWhiteSpace(CurrentCharacter))
{
Context.AcceptLine(includeNewLineSequence: true);
Context.AcceptTemporaryBuffer();
Context.StartTemporaryBuffer();
}
}
}
protected bool TryParseComment(SpanFactory previousSpanFactory)
{
// Check for comment
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (Context.Peek(RazorParser.StartCommentSequence, caseSensitive: true))
{
Context.AcceptTemporaryBuffer();
End(previousSpanFactory);
}
else
{
return(false);
}
}
ParseComment();
return(true);
}
/// <summary>
/// Parses the modeltype statement.
/// </summary>
/// <param name="block">The code block.</param>
public bool ParseModelTypeStatement(CodeBlockInfo block)
{
Contract.Requires(block != null);
using (StartBlock(BlockType.Directive))
{
block.ResumeSpans(Context);
SourceLocation location = CurrentLocation;
bool readWhitespace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, false, readWhitespace ? AcceptedCharacters.None : AcceptedCharacters.Any));
if (_modelOrInheritsStatementFound)
{
OnError(location, "The modeltype or inherits keywords can only appear once.");
}
_modelOrInheritsStatementFound = true;
// Accept Whitespace up to the new line or non-whitespace character
Context.AcceptWhiteSpace(false);
string typeName = null;
if (ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
using (Context.StartTemporaryBuffer())
{
Context.AcceptUntil(ParserHelpers.IsNewLine);
typeName = Context.ContentBuffer.ToString();
Context.AcceptTemporaryBuffer();
}
Context.AcceptNewLine();
}
else
{
OnError(location, "Expected model identifier.");
}
End(new ModelSpan(Context, typeName));
}
return(false);
}
private bool ParseModelStatement(CodeBlockInfo block)
{
using (StartBlock(BlockType.Directive)) {
block.ResumeSpans(Context);
SourceLocation endModelLocation = CurrentLocation;
bool readWhitespace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: readWhitespace ? AcceptedCharacters.None : AcceptedCharacters.Any));
if (_modelStatementFound)
{
OnError(endModelLocation, String.Format(CultureInfo.CurrentCulture, MvcResources.MvcRazorCodeParser_OnlyOneModelStatementIsAllowed, ModelTypeKeyword));
}
_modelStatementFound = true;
// Accept Whitespace up to the new line or non-whitespace character
Context.AcceptWhiteSpace(includeNewLines: false);
string typeName = null;
if (ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
using (Context.StartTemporaryBuffer()) {
Context.AcceptUntil(c => ParserHelpers.IsNewLine(c));
typeName = Context.ContentBuffer.ToString();
Context.AcceptTemporaryBuffer();
}
Context.AcceptNewLine();
}
else
{
OnError(endModelLocation, String.Format(CultureInfo.CurrentCulture, MvcResources.MvcRazorCodeParser_ModelKeywordMustBeFollowedByTypeName, ModelTypeKeyword));
}
CheckForInheritsAndModelStatements();
End(new ModelSpan(Context, typeName));
}
return(false);
}
/// <summary>
/// Parses the model statement.
/// </summary>
/// <param name="block">The code block.</param>
private bool ParseModelStatement(CodeBlockInfo block)
{
var location = CurrentLocation;
bool readWhiteSpace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, false, readWhiteSpace ? AcceptedCharacters.None : AcceptedCharacters.Any));
if (_modelOrInheritsStatementFound)
{
OnError(location, "The model or inherits keywords can only appear once.");
}
_modelOrInheritsStatementFound = true;
Context.AcceptWhiteSpace(false);
string typeName = null;
if (ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
using (Context.StartTemporaryBuffer())
{
Context.AcceptUntil(ParserHelpers.IsNewLine);
typeName = Context.ContentBuffer.ToString();
Context.AcceptTemporaryBuffer();
}
Context.AcceptNewLine();
}
else
{
OnError(location, "Expected model identifier.");
}
End(new ModelSpan(Context, typeName));
return(false);
}
private bool ParseResourceStatement(CodeBlockInfo block)
{
End(MetaCodeSpan.Create);
SourceLocation endModelLocation = CurrentLocation;
if (_modelStatementFound)
{
OnError(endModelLocation, String.Format(CultureInfo.CurrentCulture, "Only one '{0}' statement is allowed in a file.", ResourceKeyword));
}
_modelStatementFound = true;
// Accept Whitespace up to the new line or non-whitespace character
Context.AcceptWhiteSpace(false);
string typeName = null;
if (ParserHelpers.IsIdentifierStart(CurrentCharacter))
{
using (Context.StartTemporaryBuffer())
{
// Accept a dotted-identifier, but allow <>
AcceptTypeName();
typeName = Context.ContentBuffer.ToString();
Context.AcceptTemporaryBuffer();
}
}
else
{
OnError(endModelLocation, String.Format(CultureInfo.CurrentCulture, "The '{0}' keyword must be followed by a type name on the same line.", ResourceKeyword));
}
CheckForInheritsAndResourceStatements();
End(ResourceSpan.Create(Context, typeName));
return(false);
}
private bool ParseStartPsuedoTag(Stack <TagInfo> tags, TagInfo tag)
{
Debug.Assert(!tag.IsEndTag, "ParseStartPsuedoTag requires a start tag");
// Output what we've seen so far, since the "<text>" is not a markup token, it's a transition token
if (HaveContent)
{
End(MarkupSpan.Create);
}
// Accept the "<text>"
Context.Expect("<");
Context.AcceptWhiteSpace(includeNewLines: true);
Context.Expect("text");
bool isValid = false;
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter == '/' || CurrentCharacter == '>')
{
isValid = true;
Context.AcceptTemporaryBuffer();
}
}
bool transitionComplete = false;
bool isEmpty = false;
if (!isValid)
{
OnError(tag.Start, RazorResources.ParseError_TextTagCannotContainAttributes);
}
else
{
isEmpty = CurrentCharacter == '/';
Context.AcceptCurrent();
if (isEmpty)
{
if (CurrentCharacter != '>')
{
OnError(CurrentLocation, RazorResources.ParseError_SlashInEmptyTagMustBeFollowedByCloseAngle);
}
else
{
transitionComplete = true;
Context.AcceptCurrent();
}
}
else
{
transitionComplete = true;
}
}
// Output the transition
End(TransitionSpan.Create(Context, hidden: false, acceptedCharacters: transitionComplete ? AcceptedCharacters.None : AcceptedCharacters.Any));
// Push it on to the stack and continue
if (!isEmpty)
{
tags.Push(tag);
}
return(isEmpty);
}
protected virtual bool BalanceBrackets(bool allowTransition, SpanFactory spanFactory, bool appendOuter, char?bracket, bool useTemporaryBuffer)
{
spanFactory = spanFactory ?? CodeSpan.Create;
if (useTemporaryBuffer)
{
Context.StartTemporaryBuffer();
}
int nesting = 0; // Nesting level
bool callerReadBracket = true;
if (bracket == null)
{
callerReadBracket = false;
bracket = CurrentCharacter;
}
else
{
// The caller already read the bracket, so start at nesting level 1, and also, don't append the outer bracket
nesting = 1;
}
char terminator = _bracketPairs[bracket.Value];
do
{
// Gather whitespace
Context.StartTemporaryBuffer();
AcceptWhiteSpaceByLines();
if (CurrentCharacter == RazorParser.TransitionCharacter)
{
if (Context.Peek(RazorParser.StartCommentSequence, caseSensitive: true))
{
Context.AcceptTemporaryBuffer();
if (useTemporaryBuffer)
{
Context.AcceptTemporaryBuffer();
}
End(spanFactory);
ParseComment();
if (useTemporaryBuffer)
{
Context.StartTemporaryBuffer();
}
}
else if (allowTransition)
{
Context.RejectTemporaryBuffer();
if (!HandleTransition(spanFactory))
{
Context.AcceptWhiteSpace(includeNewLines: true);
if (!TryAcceptStringOrComment())
{
Context.AssertCurrent(RazorParser.TransitionCharacter);
Context.AcceptCurrent();
}
}
else if (useTemporaryBuffer)
{
// Start a new outer temporary buffer
Context.StartTemporaryBuffer();
}
}
else
{
Context.AcceptTemporaryBuffer();
if (!TryAcceptStringOrComment())
{
Context.AcceptCurrent();
}
}
}
else
{
Context.AcceptTemporaryBuffer();
}
AcceptUntilUnquoted(c => Char.IsWhiteSpace(c) || c == bracket || c == terminator || c == RazorParser.TransitionCharacter);
if (CurrentCharacter == terminator)
{
// If the nesting level is 1 and no bracket was specified, don't read the terminator, but we are done
if (nesting == 1 && callerReadBracket)
{
nesting--;
}
else
{
AcceptOrSkipCurrent(appendOuter, --nesting);
}
}
else if (CurrentCharacter == bracket)
{
AcceptOrSkipCurrent(appendOuter, nesting++);
}
} while (!EndOfFile && nesting > 0);
if (useTemporaryBuffer)
{
if (nesting > 0)
{
Context.RejectTemporaryBuffer();
}
else
{
Context.AcceptTemporaryBuffer();
}
}
Debug.Assert(!InTemporaryBuffer);
return(nesting == 0); // Return a boolean indicating if we exited because of EOF or because of the end bracket
}