private bool ParseModelStatement(CodeBlockInfo block)
{
using (this.StartBlock(BlockType.Directive))
{
block.ResumeSpans(this.Context);
var currentLocation = 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 @ModelType 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, "@ModelType must be followed by a type name."));
}
this.CheckForInheritsAndModelStatements();
this.End(new ModelSpan(this.Context, modelTypeName));
}
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 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 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 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 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 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;
}
}
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;
}
private bool ParseOptionStatement(CodeBlockInfo block) {
using (StartBlock(BlockType.Directive)) {
block.ResumeSpans(Context);
Context.AcceptWhiteSpace(includeNewLines: true);
// Read the next two identifiers with interleaved whitespace
// TODO: Error checking
SourceLocation errorLocation = CurrentLocation;
string option = Context.AcceptIdentifier();
string codeDomOptionName = null;
bool flag = true; // Default to whatever the "on" value is
if (String.Equals(option, "strict", StringComparison.OrdinalIgnoreCase)) {
codeDomOptionName = OptionStrictCodeDomName;
flag = false; // Strict On == AllowLateBinding Off
}
else if (String.Equals(option, "explicit", StringComparison.OrdinalIgnoreCase)) {
// Explicit On = RequireVariableDeclaration On
codeDomOptionName = OptionExplicitCodeDomName;
}
else {
OnError(errorLocation, RazorResources.ParseError_UnknownOption, option);
}
if (codeDomOptionName != null) {
Context.AcceptWhiteSpace(includeNewLines: true);
string value = Context.AcceptIdentifier();
if (String.Equals(value, "off", StringComparison.OrdinalIgnoreCase)) {
// Flip the flag to it's "off" value
flag = !flag;
}
else if (!String.Equals(value, "on", StringComparison.OrdinalIgnoreCase)) {
// Not ON or OFF ==> Error
OnError(errorLocation, RazorResources.ParseError_InvalidOptionValue, option, value);
}
}
End(VBOptionSpan.Create(Context, codeDomOptionName, flag));
}
return true;
}
protected virtual bool ParseInheritsStatement(CodeBlockInfo block) {
using (StartBlock(BlockType.Directive)) {
block.ResumeSpans(Context);
SourceLocation endInheritsLocation = 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 true;
}
private bool ParseSectionStatement(CodeBlockInfo block) {
using (StartBlock(BlockType.Section)) {
block.ResumeSpans(Context);
RequireSingleWhiteSpace();
AcceptWhitespaceWithVBNewlines();
string sectionName = Context.ExpectIdentifier(RazorResources.ParseError_Unexpected_Character_At_Section_Name_Start,
allowPrecedingWhiteSpace: false);
SectionHeaderSpan headerSpan = SectionHeaderSpan.Create(Context, sectionName ?? String.Empty, acceptedCharacters: AcceptedCharacters.Any);
End(headerSpan);
// Parse a section
Context.SwitchActiveParser();
Context.MarkupParser.ParseSection(Tuple.Create((string)null, "end section"), caseSensitive: false);
Context.SwitchActiveParser();
// Expect "End Section" (Expect will throw errors if they aren't there)
if (EndOfFile) {
OnError(block.Start, RazorResources.ParseError_BlockNotTerminated, "Section", EndSectionKeyword);
headerSpan.AutoCompleteString = EndSectionKeyword;
return true;
}
bool success = false;
if (Context.Expect("end", outputError: true, errorMessage: null, caseSensitive: false)) {
Context.AcceptWhiteSpace(includeNewLines: true);
success = Context.Expect("section", outputError: true, errorMessage: null, caseSensitive: false);
}
if (!success) {
headerSpan.AutoCompleteString = EndSectionKeyword;
}
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
}
return true;
}
private bool ParseHelperBlock(CodeBlockInfo block) {
using (StartBlock(BlockType.Helper)) {
block.ResumeSpans(Context);
SourceLocation errorLocation = CurrentLocation;
// If we see a new line then bail out early
bool ateNewLine = ParserHelpers.IsNewLine(CurrentCharacter);
bool readWhitespace = RequireSingleWhiteSpace();
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: readWhitespace ? AcceptedCharacters.None : AcceptedCharacters.Any));
if (ateNewLine) {
return true;
}
// Accept whitespace
AcceptWhitespaceWithVBNewlines();
// 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;
AcceptWhitespaceWithVBNewlines();
bool outputtedHeader = false;
if (Context.Expect('(', outputError: !seenError, errorMessage: RazorResources.ParseError_MissingCharAfterHelperName, caseSensitive: false, errorLocation: errorLocation)) {
errorLocation = CurrentLocation;
if (!BalanceBrackets(allowTransition: false, spanFactory: null, appendOuter: true, bracket: '(', useTemporaryBuffer: false)) {
OnError(errorLocation, RazorResources.ParseError_UnterminatedHelperParameterList);
}
else {
Context.Expect(')');
outputtedHeader = true;
Span headerSpan = HelperHeaderSpan.Create(Context, complete: !seenError, acceptedCharacters: AcceptedCharacters.Any);
End(headerSpan);
Context.FlushNextOutputSpan();
if (!HelperBodyParser(new CodeBlockInfo("Helper", block.Start, isTopLevel: true))) {
headerSpan.AutoCompleteString = VBCodeParser.EndHelperKeyword;
}
}
}
// Capture what we saw as an incomplete helper header span and return
if (!outputtedHeader && readWhitespace) {
End(HelperHeaderSpan.Create(Context, complete: false));
}
}
return true;
}