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);
}
private void ParseEndPsuedoTag(Stack <TagInfo> tags, TagInfo tag, bool inDocument)
{
Debug.Assert(tag.IsEndTag, "ParseEndPsuedoTag requires an end tag");
// Collect what we've seen so far, since the "</text>" is not a markup span, it's a transition span
Span prev = null;
if (HaveContent)
{
prev = MarkupSpan.Create(Context);
Context.ResetBuffers();
}
// Accept the "</text>"
Context.Expect("<");
Context.AcceptWhiteSpace(includeNewLines: true);
Context.Expect("/text");
bool complete = CurrentCharacter == '>';
if (!complete)
{
OnError(tag.Start, RazorResources.ParseError_TextTagCannotContainAttributes);
}
else
{
Context.AcceptCurrent();
}
// Remove the tag
UpdateTagStack(tags, tag, !inDocument);
if (tags.Count == 0)
{
// That was the top-level tag, output the markup then a transition span for the </text>
if (prev != null)
{
Output(prev);
}
End(TransitionSpan.Create(Context, hidden: false, acceptedCharacters: complete ? AcceptedCharacters.None : AcceptedCharacters.Any));
}
else
{
// Wasn't top-level, so resume the original span
Context.ResumeSpan(prev);
}
}
/// <summary>
/// Starts a block of the specified type
/// </summary>
/// <remarks>
/// The current contents of the buffer will be outputted as a transition token AFTER starting the block if outputCurrentBufferAsTransition is true
/// </remarks>
/// <param name="blockType">The type of the block to start</param>
public IDisposable StartBlock(BlockType blockType, bool outputCurrentBufferAsTransition)
{
AssertOnOwnerTask();
if (blockType == BlockType.Template)
{
HandleNestingCheck(RazorResources.ParseError_InlineMarkup_Blocks_Cannot_Be_Nested,
ref _nestedAnonymousSections);
}
else if (blockType == BlockType.Section)
{
HandleNestingCheck(FormatForLanguage(RazorResources.ParseError_Sections_Cannot_Be_Nested,
RazorResources.SectionExample_VB,
RazorResources.SectionExample_CS),
ref _nestedNamedSections);
if (_nestedHelpers > 0)
{
OnError(CurrentLocation, RazorResources.ParseError_Helpers_Cannot_Contain_Sections);
}
}
else if (blockType == BlockType.Helper)
{
HandleNestingCheck(RazorResources.ParseError_Helpers_Cannot_Be_Nested, ref _nestedHelpers);
}
// TODO: Remove this super-hacky whitespace rewriting
if (!DesignTimeMode &&
!WhiteSpaceIsImportantToAncestorBlock &&
blockType == BlockType.Statement &&
(_blockStack.Count == 0 || _blockStack.Peek() != BlockType.Statement) &&
_nextSpanToOutput != null)
{
HandleWhitespaceRewriting();
}
else
{
FlushNextOutputSpan();
}
_blockStack.Push(blockType);
Visitor.VisitStartBlock(blockType);
if (outputCurrentBufferAsTransition && HaveContent)
{
OutputSpan(TransitionSpan.Create(this, hidden: false, acceptedCharacters: AcceptedCharacters.None));
ResetBuffers();
}
return(new DisposableAction(EndBlock));
}
protected void ParseComment()
{
using (StartBlock(BlockType.Comment)) {
SourceLocation startLocation = CurrentLocation;
Context.Expect(RazorParser.StartCommentSequence[0]);
End(TransitionSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
Context.Expect(RazorParser.StartCommentSequence[1]);
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
bool inComment = true;
while (inComment && !EndOfFile)
{
Context.AcceptUntil(RazorParser.EndCommentSequence[0]);
if (Context.Peek(RazorParser.EndCommentSequence, caseSensitive: true))
{
inComment = false;
}
else
{
Context.AcceptCurrent();
}
}
End(CommentSpan.Create);
if (EndOfFile)
{
OnError(startLocation, RazorResources.ParseError_RazorComment_Not_Terminated);
}
else
{
Context.Expect(RazorParser.EndCommentSequence[0]);
End(MetaCodeSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
Context.Expect(RazorParser.EndCommentSequence[1]);
End(TransitionSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
}
}
}
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);
}
public override void ParseBlock()
{
if (Context == null)
{
throw new InvalidOperationException(RazorResources.Parser_Context_Not_Set);
}
using (StartBlock(BlockType.Markup)) {
// An HTML block starts with a start tag and ends with the matching end tag. For example, each of the following lines are HTML blocks:
// <li>foo</li>
// <li>foo<b>bar</b></li>
// <text>This block uses the <pre><text></pre> pseudo-tag which is not emitted, but is used for balancing tags</text>
// Or, if it starts with a ":", then it is part of the "@:" single-line markup construct. The ":" is discarded and the rest of the line is markup
// For example, each of the following lines are HTML blocks:
// :this is all markup, except for the initial ':'
// :you <b>can</b> put tags in here <em>and</em> they don't have to be <img src="foo.jpg"> balanced!
SpanFactory spanFactory = MarkupSpan.Create;
Context.AcceptWhiteSpace(includeNewLines: true);
if (CurrentCharacter == RazorParser.TransitionCharacter)
{
if (HaveContent)
{
End(MarkupSpan.Create);
}
Context.AcceptCurrent();
Debug.Assert(HaveContent);
End(TransitionSpan.Create(Context, hidden: false, acceptedCharacters: AcceptedCharacters.None));
if (CurrentCharacter == RazorParser.TransitionCharacter)
{
// Second "@" is for VB
// TODO: Refactor!!!
Context.AcceptCurrent();
End(MetaCodeSpan.Create);
}
}
bool complete = false;
if (CurrentCharacter == ':')
{
// Parse a single line of markup
spanFactory = SingleLineMarkupSpan.Create;
Context.WhiteSpaceIsImportantToAncestorBlock = true;
complete = !ParseSingleLineBlock();
Context.WhiteSpaceIsImportantToAncestorBlock = false;
}
else if (CurrentCharacter == '<')
{
complete = !ParseTagBlock(false);
}
else
{
// First non-whitespace character in a block must be a start tag or ':'
OnError(CurrentLocation, RazorResources.ParseError_MarkupBlock_Must_Start_With_Tag);
return;
}
// Output anything that's left over
// If we have content ==> Output
// If the previous span can't grow ==> Output UNLESS we're "complete"
if ((!complete && !Context.PreviousSpanCanGrow) || HaveContent)
{
Span span = spanFactory(Context);
span.AcceptedCharacters = complete ? AcceptedCharacters.None : AcceptedCharacters.Any;
End(span);
}
}
}