Token NextToken()
{
while (ch == ' ' ||
ch == 10 || ch == 13
) NextCh();
if (ch == '/' && Comment0()) return NextToken();
int recKind = noSym;
int recEnd = pos;
t = new Token();
t.pos = pos; t.col = col; t.line = line; t.charPos = charPos;
int state;
if (start.ContainsKey(ch)) { state = (int) start[ch]; }
else { state = 0; }
tlen = 0; AddCh();
switch (state) {
case -1: { t.kind = eofSym; break; } // NextCh already done
case 0: {
if (recKind != noSym) {
tlen = recEnd - t.pos;
SetScannerBehindT();
}
t.kind = recKind; break;
} // NextCh already done
case 1:
recEnd = pos; recKind = 1;
if (ch == '-' || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 1;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 2:
{t.kind = 2; break;}
case 3:
{t.kind = 3; break;}
case 4:
{t.kind = 4; break;}
case 5:
if (ch == '!') {AddCh(); goto case 6;}
else {goto case 0;}
case 6:
if (ch == '-') {AddCh(); goto case 7;}
else {goto case 0;}
case 7:
if (ch == '-') {AddCh(); goto case 8;}
else {goto case 0;}
case 8:
{t.kind = 5; break;}
case 9:
if (ch == '>') {AddCh(); goto case 10;}
else {goto case 0;}
case 10:
{t.kind = 6; break;}
case 11:
{t.kind = 7; break;}
case 12:
{t.kind = 8; break;}
case 13:
{t.kind = 10; break;}
case 14:
{t.kind = 11; break;}
case 15:
{t.kind = 23; break;}
case 16:
{t.kind = 25; break;}
case 17:
{t.kind = 26; break;}
case 18:
{t.kind = 27; break;}
case 19:
{t.kind = 28; break;}
case 20:
{t.kind = 29; break;}
case 21:
{t.kind = 30; break;}
case 22:
{t.kind = 34; break;}
case 23:
{t.kind = 35; break;}
case 24:
{t.kind = 36; break;}
case 25:
{t.kind = 37; break;}
case 26:
{t.kind = 38; break;}
case 27:
{t.kind = 39; break;}
case 28:
if (ch == '=') {AddCh(); goto case 29;}
else {goto case 0;}
case 29:
{t.kind = 40; break;}
case 30:
if (ch == '=') {AddCh(); goto case 31;}
else {goto case 0;}
case 31:
{t.kind = 41; break;}
case 32:
{t.kind = 42; break;}
case 33:
{t.kind = 43; break;}
case 34:
{t.kind = 44; break;}
case 35:
{t.kind = 45; break;}
case 36:
{t.kind = 47; break;}
case 37:
{t.kind = 48; break;}
case 38:
{t.kind = 49; break;}
case 39:
recEnd = pos; recKind = 24;
if (ch == '-') {AddCh(); goto case 9;}
else {t.kind = 24; break;}
case 40:
recEnd = pos; recKind = 31;
if (ch == '=') {AddCh(); goto case 26;}
else {t.kind = 31; break;}
case 41:
recEnd = pos; recKind = 32;
if (ch == '=') {AddCh(); goto case 32;}
else {t.kind = 32; break;}
case 42:
recEnd = pos; recKind = 33;
if (ch == '=') {AddCh(); goto case 27;}
else {t.kind = 33; break;}
case 43:
recEnd = pos; recKind = 1;
if (ch == '-' || ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 1;}
else if (ch == 92) {AddCh(); goto case 37;}
else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
}
t.val = new String(tval, 0, tlen);
return t;
}
// get the next token (possibly a token already seen during peeking)
internal Token Scan()
{
if (tokens.next == null) {
return NextToken();
} else {
pt = tokens = tokens.next;
return tokens;
}
}
void Init()
{
pos = -1; line = 1; col = 0; charPos = -1;
oldEols = 0;
NextCh();
if (ch == 0xEF) { // check optional byte order mark for UTF-8
NextCh(); int ch1 = ch;
NextCh(); int ch2 = ch;
if (ch1 != 0xBB || ch2 != 0xBF) {
throw new FatalError(String.Format("illegal byte order mark: EF {0,2:X} {1,2:X}", ch1, ch2));
}
buffer = new UTF8Buffer(buffer); col = 0; charPos = -1;
NextCh();
}
pt = tokens = new Token(); // first token is a dummy
}
// peek for the next token, ignore pragmas
internal Token Peek()
{
do {
if (pt.next == null) {
pt.next = NextToken();
}
pt = pt.next;
} while (pt.kind > maxT); // skip pragmas
return pt;
}
// make sure that peeking starts at the current scan position
internal void ResetPeek()
{
pt = tokens;
}
private Rule SkipDeclarations(Token token)
{
RaiseErrorOccurred(ParseError.InvalidToken, token.Position);
MoveToRuleEnd(ref token);
return default(Rule);
}
private List<IConditionFunction> MultipleConditions(IConditionFunction condition, string connector,ref Token token)
{
var list = new List<IConditionFunction>();
ParseComments(ref token);
list.Add(condition);
while (token.Type != TokenType.EndOfFile)
{
condition = ExtractCondition(ref token);
if (condition == null)
{
break;
}
list.Add(condition);
if (!token.Data.Isi(connector))
{
break;
}
token = NextToken();
ParseComments(ref token);
}
return list;
}
public Property CreateDeclaration(ref Token token)
{
ParseComments(ref token);
return CreateDeclarationWith(PropertyFactory.Instance.Create, ref token);
}
public Medium CreateMedium(ref Token token)
{
var medium = new Medium();
ParseComments(ref token);
if (token.Type == TokenType.Ident)
{
var identifier = token.Data;
if (identifier.Isi(Keywords.Not))
{
medium.IsInverse = true;
token = NextToken();
ParseComments(ref token);
}
else if (identifier.Isi(Keywords.Only))
{
medium.IsExclusive = true;
token = NextToken();
ParseComments(ref token);
}
}
if (token.Type == TokenType.Ident)
{
medium.Type = token.Data;
token = NextToken();
ParseComments(ref token);
if ((token.Type != TokenType.Ident) || !token.Data.Isi(Keywords.And))
{
return medium;
}
token = NextToken();
ParseComments(ref token);
}
do
{
if (token.Type != TokenType.RoundBracketOpen)
{
return null;
}
token = NextToken();
ParseComments(ref token);
var feature = CreateFeature(ref token);
if (feature != null)
{
medium.AppendChild(feature);
}
if (token.Type != TokenType.RoundBracketClose)
{
return null;
}
token = NextToken();
ParseComments(ref token);
if (feature == null)
{
return null;
}
if ((token.Type != TokenType.Ident) || !token.Data.Isi(Keywords.And))
{
break;
}
token = NextToken();
ParseComments(ref token);
} while (token.Type != TokenType.EndOfFile);
return medium;
}
public Property CreateDeclarationWith(Func<string, Property> createProperty, ref Token token)
{
var property = default(Property);
var sb = Pool.NewStringBuilder();
var start = token.Position;
while (token.IsDeclarationName())
{
sb.Append(token.ToValue());
token = NextToken();
}
var propertyName = sb.ToPool();
if (propertyName.Length > 0)
{
property = _parser.Options.IncludeUnknownDeclarations ||
_parser.Options.AllowInvalidValues
? new UnknownProperty(propertyName)
: createProperty(propertyName);
if (property == null)
{
RaiseErrorOccurred(ParseError.UnknownDeclarationName, start);
}
else
{
_nodes.Push(property);
}
ParseComments(ref token);
if (token.Type == TokenType.Colon)
{
bool important;
var value = CreateValue(TokenType.CurlyBracketClose, ref token, out important);
if (value == null)
{
RaiseErrorOccurred(ParseError.ValueMissing, token.Position);
}
else if ((property != null) && property.TrySetValue(value))
{
property.IsImportant = important;
}
ParseComments(ref token);
}
else
{
RaiseErrorOccurred(ParseError.ColonMissing, token.Position);
}
JumpToDeclEnd(ref token);
if (property != null)
{
_nodes.Pop();
}
}
else if (token.Type != TokenType.EndOfFile)
{
RaiseErrorOccurred(ParseError.IdentExpected, start);
JumpToDeclEnd(ref token);
}
if (token.Type == TokenType.Semicolon)
{
token = NextToken();
}
return property;
}
public IConditionFunction CreateCondition(ref Token token)
{
ParseComments(ref token);
return AggregateCondition(ref token);
}
public TokenValue CreateValue(ref Token token)
{
bool important;
return CreateValue(TokenType.CurlyBracketClose, ref token, out important);
}
void Get()
{
for (;;) {
t = la;
la = scanner.Scan();
if (la.kind <= maxT) { ++errDist; break; }
la = t;
}
}
internal void Parse()
{
la = new Token();
la.val = "";
Get();
Css3();
Expect(0);
}
