private static void MatchNormal(string data, ref int pos, int end)
{
for (; pos < end; pos++)
{
switch (data[pos])
{
case '\'':
return;
case '\"':
return;
case '/':
if (end > pos + 1)
{
switch (data[pos + 1])
{
case '/':
case '*':
return;
}
}
break;
case '<':
if (ParseMethods.SubstringMatch(data, pos, end, "<!--"))
{
return;
}
break;
case '-':
if (ParseMethods.SubstringMatch(data, pos, end, "-->"))
{
return;
}
break;
case 'u':
case 'U':
if (ParseMethods.SubstringMatchIgnoreCase(data, pos, end, "url("))
{
return;
}
break;
case '@':
if (ParseMethods.SubstringMatchIgnoreCase(data, pos, end, "@import"))
{
return;
}
break;
}
}
}
private static void MatchImport(string data, ref int pos, int end, out int literalPos, out int literalEnd, out char quotChar)
{
literalPos = pos;
literalEnd = pos;
quotChar = (char)0;
// skip (illegal) leading whitespace, e.g. url( http://www.microsoft.com)
MatchWhitespace(data, ref pos, end);
if (pos >= end)
{
return;
}
if (ParseMethods.SubstringMatchIgnoreCase(data, pos, end, "url("))
{
pos += 4;
MatchUrl(data, ref pos, end, out literalPos, out literalEnd, out quotChar);
ParseMethods.MatchUntilChar(';', true, data, ref pos, end);
return;
}
switch (data[pos++])
{
case '\'':
quotChar = '\'';
literalPos = pos;
ParseMethods.MatchSingleQuotedLiteral(data, ref pos, end, out literalEnd);
MatchWhitespace(data, ref pos, end);
ParseMethods.MatchUntilChar(';', true, data, ref pos, end);
break;
case '"':
quotChar = '"';
literalPos = pos;
ParseMethods.MatchDoubleQuotedLiteral(data, ref pos, end, out literalEnd);
MatchWhitespace(data, ref pos, end);
ParseMethods.MatchUntilChar(';', true, data, ref pos, end);
break;
default:
quotChar = (char)0;
literalPos = --pos;
ParseMethods.MatchUntilChar(';', true, data, ref pos, end);
literalEnd = Math.Max(literalPos, pos - 1);
TrimWhitespace(data, ref literalPos, ref literalEnd);
break;
}
}
public StyleElement Next()
{
if (pos >= end)
{
return(null);
}
int start = pos;
switch (data[pos++])
{
case '"':
{
int literalPos = pos;
int literalEnd;
ParseMethods.MatchDoubleQuotedLiteral(data, ref pos, end, out literalEnd);
return(new StyleLiteral(data, start, pos - start, literalPos, literalEnd - literalPos, '"'));
}
case '\'':
{
int literalPos = pos;
int literalEnd;
ParseMethods.MatchSingleQuotedLiteral(data, ref pos, end, out literalEnd);
return(new StyleLiteral(data, start, pos - start, literalPos, literalEnd - literalPos, '\''));
}
case '/':
if (ParseMethods.SubstringMatch(data, pos - 1, end, "//"))
{
pos++;
ParseMethods.MatchSingleLineComment(data, ref pos, end);
return(new StyleComment(data, start, pos - start));
}
else if (ParseMethods.SubstringMatch(data, pos - 1, end, "/*"))
{
pos++;
ParseMethods.MatchMultiLineComment(data, ref pos, end);
return(new StyleComment(data, start, pos - start));
}
goto default;
case '<':
if (ParseMethods.SubstringMatch(data, pos - 1, end, "<!--"))
{
pos += 3;
ParseMethods.MatchSingleLineComment(data, ref pos, end);
return(new StyleComment(data, start, pos - start));
}
goto default;
case '-':
if (ParseMethods.SubstringMatch(data, pos - 1, end, "-->"))
{
pos += 2;
ParseMethods.MatchSingleLineComment(data, ref pos, end);
return(new StyleComment(data, start, pos - start));
}
goto default;
case 'u':
case 'U':
{
if (ParseMethods.SubstringMatchIgnoreCase(data, pos - 1, end, "url("))
{
int literalPos;
int literalEnd;
char quotChar;
pos += 3;
MatchUrl(data, ref pos, end, out literalPos, out literalEnd, out quotChar);
return(new StyleUrl(data, start, pos - start, literalPos, literalEnd - literalPos, quotChar));
}
goto default;
}
case '@':
{
const string IMPORT = "@import";
if (ParseMethods.SubstringMatchIgnoreCase(data, pos - 1, end, IMPORT))
{
// We play a little fast and loose with CSS here. Technically
// it's possible for "@import" to be immediately followed by
// something besides a whitespace char and still be valid, but
// we will not recognize those cases as @import statements,
// except when the following char is a quote.
int nextCharIndex = pos - 1 + IMPORT.Length;
if (data.Length > nextCharIndex)
{
char nextChar = data[nextCharIndex];
if (IsWhitespace(nextChar))
{
pos += IMPORT.Length;
}
else if (nextChar == '\'' || nextChar == '"')
{
pos += IMPORT.Length - 1;
}
else
{
goto default; // per note above, treat as normal text
}
int literalPos;
int literalEnd;
char quotChar;
MatchImport(data, ref pos, end, out literalPos, out literalEnd, out quotChar);
return(new StyleImport(data, start, pos - start, literalPos, literalEnd - literalPos, quotChar));
}
}
goto default;
}
default:
MatchNormal(data, ref pos, end);
return(new StyleText(data, start, pos - start));
}
}
