public override bool CanInterrupt(BlockProcessor processor, Block block)
{
return(!(block is ParagraphBlock));
}
public override BlockState TryContinue(BlockProcessor processor, Block block)
{
var htmlBlock = (HtmlBlock)block;
return(MatchEnd(processor, htmlBlock));
}
private BlockState TryParseTagType16(BlockProcessor state, StringSlice line, int startColumn, int startPosition)
{
char c;
c = line.CurrentChar;
if (c == '!')
{
c = line.NextChar();
if (c == '-' && line.PeekChar() == '-')
{
return(CreateHtmlBlock(state, HtmlBlockType.Comment, startColumn, startPosition)); // group 2
}
if (c.IsAlphaUpper())
{
return(CreateHtmlBlock(state, HtmlBlockType.DocumentType, startColumn, startPosition)); // group 4
}
if (c == '[' && line.Match("CDATA[", 1))
{
return(CreateHtmlBlock(state, HtmlBlockType.CData, startColumn, startPosition)); // group 5
}
return(BlockState.None);
}
if (c == '?')
{
return(CreateHtmlBlock(state, HtmlBlockType.ProcessingInstruction, startColumn, startPosition)); // group 3
}
var hasLeadingClose = c == '/';
if (hasLeadingClose)
{
c = line.NextChar();
}
var tag = new char[10];
var count = 0;
for (; count < tag.Length; count++)
{
if (!c.IsAlphaNumeric())
{
break;
}
tag[count] = Char.ToLowerInvariant(c);
c = line.NextChar();
}
if (
!(c == '>' || (!hasLeadingClose && c == '/' && line.PeekChar() == '>') || c.IsWhitespace() ||
c == '\0'))
{
return(BlockState.None);
}
if (count == 0)
{
return(BlockState.None);
}
var tagName = new string(tag, 0, count);
var tagIndex = Array.BinarySearch(HtmlTags, tagName, StringComparer.Ordinal);
if (tagIndex < 0)
{
return(BlockState.None);
}
// Cannot start with </script </pre or </style
if ((tagIndex == 49 || tagIndex == 50 || tagIndex == 53))
{
if (c == '/' || hasLeadingClose)
{
return(BlockState.None);
}
return(CreateHtmlBlock(state, HtmlBlockType.ScriptPreOrStyle, startColumn, startPosition));
}
return(CreateHtmlBlock(state, HtmlBlockType.InterruptingBlock, startColumn, startPosition));
}
private BlockState MatchEnd(BlockProcessor state, HtmlBlock htmlBlock)
{
state.GoToColumn(state.ColumnBeforeIndent);
// Early exit if it is not starting by an HTML tag
var line = state.Line;
var result = BlockState.Continue;
int index;
switch (htmlBlock.Type)
{
case HtmlBlockType.Comment:
index = line.IndexOf(EndOfComment);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + EndOfComment.Length);
result = BlockState.Break;
}
break;
case HtmlBlockType.CData:
index = line.IndexOf(EndOfCDATA);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + EndOfCDATA.Length);
result = BlockState.Break;
}
break;
case HtmlBlockType.ProcessingInstruction:
index = line.IndexOf(EndOfProcessingInstruction);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + EndOfProcessingInstruction.Length);
result = BlockState.Break;
}
break;
case HtmlBlockType.DocumentType:
index = line.IndexOf('>');
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + 1);
result = BlockState.Break;
}
break;
case HtmlBlockType.ScriptPreOrStyle:
index = line.IndexOf("</script>", 0, true);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + "</script>".Length);
result = BlockState.Break;
}
else
{
index = line.IndexOf("</pre>", 0, true);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + "</pre>".Length);
result = BlockState.Break;
}
else
{
index = line.IndexOf("</style>", 0, true);
if (index >= 0)
{
htmlBlock.UpdateSpanEnd(index + "</style>".Length);
result = BlockState.Break;
}
}
}
break;
case HtmlBlockType.InterruptingBlock:
if (state.IsBlankLine)
{
result = BlockState.BreakDiscard;
}
break;
case HtmlBlockType.NonInterruptingBlock:
if (state.IsBlankLine)
{
result = BlockState.BreakDiscard;
}
break;
}
// Update only if we don't have a break discard
if (result != BlockState.BreakDiscard)
{
htmlBlock.Span.End = line.End;
}
return(result);
}