protected override bool ParseInheritsStatement(CodeBlockInfo block)
{
_endInheritsLocation = CurrentLocation;
bool result = base.ParseInheritsStatement(block);
CheckForInheritsAndModelStatements();
return result;
}
protected CodeBlockInfo ParseBlockStart(bool isTopLevel, bool captureTransition)
{
// Capture the transition token, if any, into a span
Span transitionSpan = null;
if (HaveContent && captureTransition)
{
transitionSpan = TransitionSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None);
Context.ResetBuffers();
}
SourceLocation start = CurrentLocation;
string identifier = Context.AcceptIdentifier();
Span initialSpan = null;
if (isTopLevel)
{
initialSpan = CodeSpan.Create(Context);
Context.ResetBuffers();
}
CodeBlockInfo block = new CodeBlockInfo(identifier, start, isTopLevel, transitionSpan, initialSpan);
return(block);
}
/// <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 ParseModelStatement(CodeBlockInfo block) {
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, ModelKeyword));
}
_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, ModelKeyword));
}
CheckForInheritsAndModelStatements();
End(new ModelSpan(Context, typeName));
return false;
}
private bool ParseModelStatement(CodeBlockInfo block)
{
var currentLocation = this.CurrentLocation;
var acceptedCharacters = this.RequireSingleWhiteSpace() ? AcceptedCharacters.None : AcceptedCharacters.Any;
this.End(MetaCodeSpan.Create(this.Context, false, acceptedCharacters));
if (this.modelStatementFound)
this.OnError(currentLocation, string.Format(CultureInfo.CurrentCulture, "Only one @model statement is allowed."));
this.modelStatementFound = true;
this.Context.AcceptWhiteSpace(false);
string modelTypeName = null;
if (ParserHelpers.IsIdentifierStart(this.CurrentCharacter))
{
using (this.Context.StartTemporaryBuffer())
{
this.Context.AcceptUntil(c => ParserHelpers.IsNewLine(c));
modelTypeName = this.Context.ContentBuffer.ToString();
this.Context.AcceptTemporaryBuffer();
}
this.Context.AcceptNewLine();
}
else
{
this.OnError(currentLocation, string.Format(CultureInfo.CurrentCulture, "@model must be followed by a type name."));
}
this.CheckForInheritsAndModelStatements();
this.End(new ModelSpan(this.Context, modelTypeName));
return false;
}
protected override bool ParseInheritsStatement(CodeBlockInfo block)
{
this.endInheritsLocation = this.CurrentLocation;
var result = this.ParseInheritsStatement(block);
this.CheckForInheritsAndModelStatements();
return result;
}
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;
}
/// <summary>
/// Parses the inherits statement.
/// </summary>
/// <param name="block">The code block.</param>
protected override bool ParseInheritsStatement(CodeBlockInfo block)
{
var location = CurrentLocation;
if (_modelOrInheritsStatementFound)
OnError(location, "The model or inherits keywords can only appear once.");
_modelOrInheritsStatementFound = true;
return base.ParseInheritsStatement(block);
}
/// <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 ParseUsingStatement(CodeBlockInfo block) {
if (block.IsTopLevel) {
Context.ResumeSpan(block.InitialSpan);
}
using (Context.StartTemporaryBuffer()) {
// Skip whitespace by lines
Context.AcceptWhiteSpace(includeNewLines: false);
if (CurrentCharacter == '(') {
Context.AcceptTemporaryBuffer();
// Parse like a regular control flow statement
if (block.IsTopLevel) {
block.InitialSpan = CodeSpan.Create(Context);
Context.ResetBuffers();
StartBlock(BlockType.Statement);
block.ResumeSpans(Context);
}
return ParseConditionalBlockStatement(block);
}
else if (!block.IsTopLevel) {
Context.RejectTemporaryBuffer();
// Not the right kind of using for this block. We're not in a top-level block and we saw a namespace import or type alias
OnError(block.Start, RazorResources.ParseError_NamespaceImportAndTypeAlias_Cannot_Exist_Within_CodeBlock);
}
else if (ParserHelpers.IsIdentifierStart(CurrentCharacter)) {
Context.RejectTemporaryBuffer();
// Parse a namespace import
block.InitialSpan = CodeSpan.Create(Context);
Context.ResetBuffers();
StartBlock(BlockType.Directive);
block.ResumeSpans(Context);
ParseNamespaceImport();
return true;
}
else {
if (block.IsTopLevel) {
Context.AcceptTemporaryBuffer();
block.InitialSpan = CodeSpan.Create(Context);
Context.ResetBuffers();
StartBlock(BlockType.Statement);
block.ResumeSpans(Context);
}
}
}
return false;
}
protected internal virtual bool ParseIfStatement(CodeBlockInfo block) {
SourceLocation errorLocation = CurrentLocation;
// Parse the body
ParseConditionalBlockStatement(block);
// Parse the attached branches
do {
// Start a temporary buffer just in case we don't see the branch we expected
Context.StartTemporaryBuffer();
AcceptWhiteSpaceAndComments();
errorLocation = CurrentLocation;
// If the first character after the whitespace isn't an identifier, or comment we're done
// If the first character is an identifier but isn't "else", we're also done
if (!ParserHelpers.IsIdentifierStart(CurrentCharacter) ||
!String.Equals("else", Context.AcceptIdentifier(), StringComparison.Ordinal)) {
Context.RejectTemporaryBuffer();
break;
}
else {
Context.AcceptTemporaryBuffer();
}
bool isElseIf = false;
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
// Now, we need to check for "else if"
if (ParserHelpers.IsIdentifierStart(CurrentCharacter) && String.Equals("if", Context.AcceptIdentifier(), StringComparison.Ordinal)) {
isElseIf = true;
// It's an else if branch, parse a condition AND a body
Context.AcceptTemporaryBuffer();
Context.AcceptWhiteSpace(includeNewLines: true);
ParseConditionalBlockStatement(new CodeBlockInfo("else if", errorLocation, false));
}
else if (CurrentCharacter == '{') {
// It's a valid else
Context.AcceptTemporaryBuffer();
}
else {
// Brace-less else
OnError(CurrentLocation, RazorResources.ParseError_SingleLine_ControlFlowStatements_Not_Allowed, "{", CurrentCharacter);
}
}
// Have to do this because the using() {} block can't overlap with the if and we want the temporary buffer cleared up before this point
if (!isElseIf) {
// It's an else branch, just parse a body
CodeBlockInfo elseBlock = new CodeBlockInfo("else", errorLocation, false);
if (CurrentCharacter == '{') {
return ParseCodeBlock(elseBlock, bracesAreMetacode: false);
}
else {
ParseStatement(elseBlock);
return false;
}
}
} while (!EndOfFile);
return false;
}
protected internal virtual bool ParseCaseBlock(CodeBlockInfo block) {
// TODO: Only allow case and default statements directly within switch statement
// Parse until the ':'
Context.AcceptUntilInclusive(':');
while (!EndOfFile) {
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
string identifier = Context.AcceptIdentifier();
if (String.Equals(identifier, "case", StringComparison.OrdinalIgnoreCase) ||
String.Equals(identifier, "default", StringComparison.OrdinalIgnoreCase)) {
// Reached the next case block
break;
}
else if (CurrentCharacter == '}') {
// Reached the end of the switch, but we don't handle the '}'
break;
}
}
ParseStatement(block);
}
return false;
}
protected internal virtual bool ParseTryStatement(CodeBlockInfo block) {
// Parse the body
ParseControlFlowBody(block);
// Check for additional clauses
bool allowAdditionalClauses = false;
do {
allowAdditionalClauses = false;
Context.StartTemporaryBuffer();
AcceptWhiteSpaceAndComments();
if (!ParserHelpers.IsIdentifierStart(CurrentCharacter)) {
Context.RejectTemporaryBuffer();
}
else {
SourceLocation blockStart = CurrentLocation;
string identifier = Context.AcceptIdentifier();
if (String.Equals(identifier, "catch")) {
Context.AcceptTemporaryBuffer();
ParseConditionalBlockStatement(new CodeBlockInfo("catch", blockStart, false));
allowAdditionalClauses = true;
}
else if (String.Equals(identifier, "finally")) {
Context.AcceptTemporaryBuffer();
// After the "finally" we know we're done, but only if it's complete
return ParseControlFlowBody(new CodeBlockInfo("finally", blockStart, false));
}
else {
Context.RejectTemporaryBuffer();
}
}
} while (allowAdditionalClauses);
return false;
}
protected internal virtual bool ParseDoStatement(CodeBlockInfo block) {
// Parse the body
bool bodyComplete = ParseControlFlowBody(block);
// Check for a while clause and return if it's not there (C# requires it, but there's no real reason we need to, C# can report the error if it's missing)
Context.StartTemporaryBuffer();
AcceptWhiteSpaceAndComments();
if (!Context.Peek("while", caseSensitive: true)) {
Context.RejectTemporaryBuffer();
return false;
}
Context.AcceptTemporaryBuffer();
// Parse the while clause
string whileKeyword = Context.AcceptIdentifier();
Debug.Assert(whileKeyword == "while");
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter == '(') {
SourceLocation errorLocation = CurrentLocation;
if (!BalanceBrackets()) {
Context.AcceptLine(includeNewLineSequence: false);
OnError(errorLocation, RazorResources.ParseError_Expected_CloseBracket_Before_EOF, "(", ")");
}
}
if (CurrentCharacter == ';') {
Context.AcceptCurrent();
return bodyComplete; // The while clause is complete
}
return false;
}
private bool ParseFunctionsBlock(CodeBlockInfo block) {
Debug.Assert(block.IsTopLevel, "Class blocks are only allowed at the top level");
Context.ResumeSpan(block.InitialSpan);
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter == '{') {
Context.AcceptWhiteSpace(includeNewLines: true);
}
else {
Context.RejectTemporaryBuffer();
block.InitialSpan = CodeSpan.Create(Context);
Context.ResetBuffers();
StartBlock(BlockType.Expression);
block.ResumeSpans(Context);
ParseImplicitExpression(block);
return false;
}
}
block.InitialSpan = MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None);
Context.ResetBuffers();
StartBlock(BlockType.Functions);
block.ResumeSpans(Context);
return ParseDelimitedBlock(block, useErrorRecovery: false, autoCompleteString: "}");
}
private bool ParseImplicitExpression(CodeBlockInfo block) {
return ParseImplicitExpression(block, acceptTrailingDot: false);
}
private bool ParseImportsStatement(CodeBlockInfo block) {
using (StartBlock(BlockType.Directive)) {
string ns = String.Empty;
block.ResumeSpans(Context);
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: false);
if (ParserHelpers.IsIdentifierStart(CurrentCharacter)) {
Context.AcceptIdentifier();
if (CurrentCharacter == '.') {
// Definitely a namespace import
Context.AcceptCurrent();
AcceptTypeName(allowGenerics: false);
}
else {
// Could be an alias, need to check what's after whitespace
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: false);
if (CurrentCharacter == '=') {
Context.AcceptTemporaryBuffer();
Context.AcceptCurrent();
Context.AcceptWhiteSpace(includeNewLines: false);
if (ParserHelpers.IsIdentifierStart(CurrentCharacter)) {
AcceptTypeName();
}
else {
OnError(CurrentLocation, RazorResources.ParseError_NamespaceOrTypeAliasExpected);
}
}
}
}
// Capture the content of the temporary buffer as the namespace
ns = Context.ContentBuffer.ToString();
}
else {
OnError(CurrentLocation, RazorResources.ParseError_NamespaceOrTypeAliasExpected);
}
Context.AcceptTemporaryBuffer();
// Capture trailing whitespace to the end of the line
Context.AcceptWhiteSpace(includeNewLines: false);
if (ParserHelpers.IsNewLine(Context.CurrentCharacter)) {
Context.AcceptNewLine();
}
}
End(NamespaceImportSpan.Create(Context, acceptedCharacters: AcceptedCharacters.Any, kind: SpanKind.MetaCode, ns: ns, namespaceKeywordLength: ImportsKeywordLength));
}
return true;
}
// Example statements:
// foreach(var f in Foo) [statement]
// { [statement-list] }
// <tag>[markup]</tag>
protected internal virtual void ParseStatement(CodeBlockInfo block) {
// Check for markup, because that will change the whitespace handling
// Dev10 Bug 884969 - Emit space between markup and code
// Whitespace ownership rules:
// * If there's no markup on a line, all the whitespace (including the trailing newline) belongs to code
// * Markup owns all markup from its start character back to, but excluding, the preceding newline (or the start of code)
// * Markup owns all markup from its end character up to, and including, the trailing newline (or the start of code)
Context.StartTemporaryBuffer();
// Eat whitespace until a non-whitespace character,
AcceptWhiteSpaceByLines();
// Error Detection: Check for @<p>Foo</p> and display an error
if (CurrentCharacter == RazorParser.TransitionCharacter && Context.MarkupParser.NextIsTransition(allowImplicit: true, allowExplicit: false)) {
Context.AcceptTemporaryBufferInDesignTimeMode();
ParseInvalidMarkupSwitch();
return;
}
// It's markup, so the whitespace belongs to the markup at runtime
else if (Context.MarkupParser.IsAtImplicitTransition() ||
(CurrentCharacter == RazorParser.TransitionCharacter && Context.MarkupParser.NextIsTransition(allowImplicit: false, allowExplicit: true))) {
Context.AcceptTemporaryBufferInDesignTimeMode();
ParseBlockWithOtherParser(previousSpanFactory: CodeSpan.Create);
return;
}
// No markup on this line, so it's whitespace belongs to code.
Context.AcceptTemporaryBuffer();
// Ok, not markup at this point, so check for C# statements and other statements
if (ParserHelpers.IsIdentifierStart(CurrentCharacter)) {
CodeBlockInfo subBlock = ParseBlockStart(isTopLevel: false, captureTransition: false);
BlockParser parser = GetBlockParser(subBlock, null);
if (parser != null) {
// Block type is always the same as the current one since Plan9 Keywords aren't allowed here, so merge it into the current block
parser(subBlock);
}
else {
AcceptStatementToSemicolon();
}
}
// Use the first character to determine if it's something we need to handle specially
else if (CurrentCharacter == RazorParser.TransitionCharacter) {
if (!TryParseComment(previousSpanFactory: CodeSpan.Create)) {
// "@[expr]" ==> Shorthand for Write([expr]);
ParseEmbeddedExpression();
}
}
else if (CurrentCharacter == '{') {
// "{ [statement-list] }" ==> Start of a code block
ParseCodeBlock(block, bracesAreMetacode: false);
}
else if (IsCommentStart()) {
AcceptComment();
}
else if (CurrentCharacter != '}') {
// Nothing interesting, so just read to the ';'
AcceptStatementToSemicolon();
}
}
protected internal virtual bool ParseInheritsStatement(CodeBlockInfo block) {
SourceLocation endInheritsLocation = Context.CurrentLocation;
bool readWhitespace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: readWhitespace ? AcceptedCharacters.None : AcceptedCharacters.Any));
// 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()) {
// Accept a dotted-identifier, but allow <>
Context.AcceptLine(includeNewLineSequence: false);
typeName = Context.ContentBuffer.ToString();
Context.AcceptTemporaryBuffer();
}
Context.AcceptNewLine();
}
else {
OnError(endInheritsLocation, RazorResources.ParseError_InheritsKeyword_Must_Be_Followed_By_TypeName);
}
if (HaveContent || readWhitespace) {
End(InheritsSpan.Create(Context, typeName));
}
return false;
}
private bool ParseCodeBlock(CodeBlockInfo block, bool bracesAreMetacode, bool acceptBraces = true) {
bool success = false;
if (acceptBraces) {
Context.AcceptCurrent(); // "{"
}
Span openBraceSpan = null;
if (bracesAreMetacode) {
openBraceSpan = MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None);
End(openBraceSpan);
}
while (!EndOfFile && CurrentCharacter != '}') {
ParseStatement(block);
}
if (bracesAreMetacode) {
if (!Context.PreviousSpanCanGrow || HaveContent) {
End(CodeSpan.Create(Context));
}
}
Context.FlushNextOutputSpan();
if (CurrentCharacter == '}') {
success = true;
if (acceptBraces) {
Context.AcceptCurrent();
if (bracesAreMetacode) {
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
}
}
}
else {
if (openBraceSpan != null && openBraceSpan.Next != null && openBraceSpan.Next is CodeSpan) {
openBraceSpan.Next.AutoCompleteString = "}";
}
OnError(block.Start, RazorResources.ParseError_Expected_EndOfBlock_Before_EOF, block.Name, '}', '{');
}
return success;
}
protected bool HandleReservedWord(CodeBlockInfo block) {
StartBlock(BlockType.Directive);
block.ResumeSpans(Context);
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
OnError(block.Start, String.Format(CultureInfo.CurrentCulture, RazorResources.ParseError_ReservedWord, block.Name));
return true;
}
private BlockParser GetBlockParser(CodeBlockInfo block, BlockParser fallbackParser, out bool isStatementBlock) {
BlockParser parser = null;
isStatementBlock = true;
if (block.Name == null || !_identifierHandlers.TryGetValue(block.Name, out parser)) {
isStatementBlock = false;
if (block.Name == null || !block.IsTopLevel || !RazorKeywords.TryGetValue(block.Name, out parser)) {
parser = fallbackParser;
}
}
return parser;
}
private BlockParser GetBlockParser(CodeBlockInfo block, BlockParser fallbackParser) {
bool _ = false; // Don't care in this case
return GetBlockParser(block, fallbackParser, out _);
}
private bool ParseHelperBlock(CodeBlockInfo block) {
SourceLocation errorLocation = CurrentLocation;
bool readWhitespace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: readWhitespace ? AcceptedCharacters.None : AcceptedCharacters.Any));
// Accept whitespace
Context.AcceptWhiteSpace(includeNewLines: false);
// Check for an identifier
bool seenError = String.IsNullOrEmpty(
Context.ExpectIdentifier(RazorResources.ParseError_Unexpected_Character_At_Helper_Name_Start, allowPrecedingWhiteSpace: true, errorLocation: errorLocation));
// Check for parameter list
errorLocation = CurrentLocation;
Context.AcceptWhiteSpace(includeNewLines: false);
bool seenOpenBracket = Context.Expect('(', outputError: !seenError, errorMessage: RazorResources.ParseError_MissingCharAfterHelperName, caseSensitive: true, errorLocation: errorLocation);
seenError |= !seenOpenBracket;
errorLocation = CurrentLocation;
if (seenOpenBracket) {
if (BalanceBrackets(allowTransition: false, spanFactory: null, appendOuter: true, bracket: '(', useTemporaryBuffer: false)) {
Context.Expect(')', outputError: !seenError);
}
else if (!seenError) {
seenError = true;
OnError(errorLocation, RazorResources.ParseError_UnterminatedHelperParameterList);
}
}
bool outputtedHeader = false;
Span headerSpan = null;
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
errorLocation = CurrentLocation;
if (Context.Expect('{', outputError: !seenError, errorMessage: RazorResources.ParseError_MissingCharAfterHelperParameters)) {
Context.AcceptTemporaryBuffer();
if (HaveContent) {
outputtedHeader = true;
// Can't grow at the end since we saw "{"
headerSpan = HelperHeaderSpan.Create(Context, !seenError, AcceptedCharacters.Any);
End(headerSpan);
Context.FlushNextOutputSpan();
}
using (Context.StartBlock(BlockType.Statement, outputCurrentBufferAsTransition: false)) {
ParseCodeBlock(block, bracesAreMetacode: false, acceptBraces: false);
End(CodeSpan.Create);
Context.FlushNextOutputSpan();
}
if (CurrentCharacter != '}') {
if (headerSpan != null) {
headerSpan.AutoCompleteString = "}";
}
}
else {
headerSpan.AcceptedCharacters = AcceptedCharacters.None;
Context.AcceptCurrent();
End(HelperFooterSpan.Create);
return true; // Helper block can't grow any more
}
}
else {
seenError = true;
Context.RejectTemporaryBuffer();
Context.AcceptWhiteSpace(includeNewLines: false);
}
}
if (!outputtedHeader && readWhitespace) {
// In an error case, we need to classify whatever we did capture as HelperHeader
End(HelperHeaderSpan.Create(Context, !seenError));
}
return false;
}
protected internal virtual bool ParseConditionalBlockStatement(CodeBlockInfo block) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter == '(') {
SourceLocation errorLocation = CurrentLocation;
// Balance parens
if (!BalanceBrackets()) {
Context.AcceptLine(includeNewLineSequence: false);
OnError(errorLocation, RazorResources.ParseError_Expected_CloseBracket_Before_EOF, "(", ")");
return false;
}
}
return ParseControlFlowBody(block);
}
private bool ParseSectionBlock(CodeBlockInfo block) {
RequireSingleWhiteSpace();
Context.AcceptWhiteSpace(includeNewLines: false);
bool complete = false;
string sectionName = Context.ExpectIdentifier(RazorResources.ParseError_Unexpected_Character_At_Section_Name_Start);
if (sectionName == null) {
End(SectionHeaderSpan.Create(Context, sectionName: String.Empty, acceptedCharacters: AcceptedCharacters.Any));
}
else {
Context.AcceptWhiteSpace(includeNewLines: false);
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter != '{') {
Context.RejectTemporaryBuffer();
OnError(CurrentLocation, RazorResources.ParseError_MissingOpenBraceAfterSection);
End(SectionHeaderSpan.Create(Context, sectionName, acceptedCharacters: AcceptedCharacters.Any));
return false;
}
else {
Context.AcceptTemporaryBuffer();
}
}
Context.AcceptCurrent(); // {
SectionHeaderSpan headerSpan = SectionHeaderSpan.Create(Context, sectionName, acceptedCharacters: AcceptedCharacters.Any);
End(headerSpan);
Context.SwitchActiveParser();
Context.MarkupParser.ParseSection(Tuple.Create("{", "}"), caseSensitive: true);
Context.SwitchActiveParser();
if (Context.CurrentCharacter == '}') {
complete = true;
Context.AcceptCurrent(); // }
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
}
else {
headerSpan.AutoCompleteString = "}";
}
}
return complete;
}
protected internal virtual bool ParseControlFlowBody(CodeBlockInfo block) {
bool success = true;
using (Context.StartTemporaryBuffer()) {
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter != '{') {
success = false;
OnError(CurrentLocation, RazorResources.ParseError_SingleLine_ControlFlowStatements_Not_Allowed, "{", CurrentCharacter);
}
else {
Context.AcceptTemporaryBuffer();
}
}
if (success) {
// We know for sure it's a code block
return ParseCodeBlock(block, bracesAreMetacode: false);
}
else {
// Error recovery, let's just accept a statement
ParseStatement(block);
return false; // Not complete yet though
}
}
private bool ParseDelimitedBlock(CodeBlockInfo block, bool allowTransition = true, bool useErrorRecovery = true, string autoCompleteString = null) {
Context.AcceptWhiteSpace(includeNewLines: true);
// Append the open bracket as a metacode token
char bracket = CurrentCharacter;
if (!_bracketPairs.ContainsKey(bracket)) {
throw new InvalidOperationException(RazorResources.ParseDelimitedBlock_Requires_Bracket);
}
char terminator = _bracketPairs[bracket];
Context.AcceptCurrent();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
// Append the terminator as a metacode token
bool complete = BalanceBrackets(allowTransition: allowTransition, spanFactory: null, appendOuter: false, bracket: bracket, useTemporaryBuffer: useErrorRecovery);
if (!complete) {
if (useErrorRecovery) {
// Try to recover
TryRecover(RecoveryModes.Markup | RecoveryModes.Transition);
}
End(CodeSpan.Create(Context, autoCompleteString));
OnError(block.Start, RazorResources.ParseError_Expected_EndOfBlock_Before_EOF, block.Name, terminator, bracket);
}
else {
End(CodeSpan.Create);
Context.AcceptCurrent();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
}
return complete;
}
private bool ParseImplicitExpression(CodeBlockInfo block, bool acceptTrailingDot) {
bool expectIdentifierFirst = block.Name == null;
block.Name = RazorResources.BlockName_ImplicitExpression;
using (StartBlock(BlockType.Expression)) {
block.ResumeSpans(Context);
AcceptedCharacters accepted = AcceptDottedExpression(acceptTrailingDot, expectIdentifierFirst, '(');
End(ImplicitExpressionSpan.Create(Context, TopLevelKeywords, acceptTrailingDot, accepted));
return true;
}
}
// @[not a block statement keyword]
protected internal virtual bool ParseImplicitExpression(CodeBlockInfo block) {
return ParseImplicitExpression(block, isWithinCode: false, expectIdentifierFirst: false);
}
protected internal virtual bool ParseImplicitExpression(CodeBlockInfo block, bool isWithinCode, bool expectIdentifierFirst) {
// TODO: Refactor this into better block creation logic
block.Name = RazorResources.BlockName_ImplicitExpression;
AcceptedCharacters accepted = AcceptDottedExpression(isWithinCode, expectIdentifierFirst, '(', '[');
End(ImplicitExpressionSpan.Create(Context, TopLevelKeywords, isWithinCode, accepted));
return true; // Return value doesn't matter since we're creating the span here.
}