public LexicalModeContext(LexicalMode start)
{
modes = new Stack <LexicalMode>(3);
this.Current = start;
modes.Push(start);
}
public void Leave(LexicalMode mode, CssTokenizer tokenizer = null)
{
if (current != mode) throw new UnexpectedModeChange(current, mode, (tokenizer == null) ? 0 : tokenizer.Current.Position);
modes.Pop();
current = modes.Peek();
}
public CssToken Consume(TokenKind expect, LexicalMode mode)
{
if (Current.Kind != expect)
{
throw new UnexpectedTokenException(mode, expect, Current);
}
return(Consume());
}
public CssToken Read(TokenKind expect, LexicalMode mode)
{
if (current.Kind != expect)
{
throw new UnexpectedTokenException(mode, expect, current);
}
return Read();
}
public CssTokenizer(SourceReader reader, LexicalMode mode = LexicalMode.Selector)
{
this.reader = reader;
this.reader.Next(); // Start the reader
this.mode = new LexicalModeContext(mode);
this.Next(); // Load the first token
}
public void Leave(LexicalMode mode, int position = 0)
{
if (Current != mode)
{
throw new UnexpectedModeChange(Current, mode, position);
}
modes.Pop();
Current = modes.Peek();
}
public CssTokenizer(SourceReader reader, LexicalMode mode = LexicalMode.Selector)
{
this.reader = reader;
this.reader.Next(); // Start the reader
this.mode = new LexicalModeContext(mode);
this.stack = new Stack <CssToken>(3);
current = default;
isEnd = false;
this.Next(); // Load the first token
}
public void Enter(LexicalMode mode)
{
modes.Push(mode);
Current = mode;
}
public UnexpectedTokenException(LexicalMode mode, CssToken token)
: base($"Unexpected token reading {mode}. Was '{token.Kind}'.")
{
Token = token;
}
public UnexpectedTokenException(LexicalMode mode, TokenKind expectedKind, CssToken token)
: base($"Unexpected token at {token.Position} reading {mode}. Expected '{expectedKind}'. Was '{token.Kind}'.", token.Position)
{
Token = token;
}
// "Current mode is:" + current + ". Leaving " + mode + "."
public UnexpectedModeChange(LexicalMode currentMode, LexicalMode leavingMode, int position)
: base($"Unexpected mode change. Expected '{leavingMode}'. Was {currentMode}.", position)
{
}
public UnexpectedTokenException(LexicalMode mode, CssToken token)
: base($"Unexpected token reading {mode}. Was '{token.Kind}'.")
{
this.token = token;
}
// "Current mode is:" + current + ". Leaving " + mode + "."
public UnbalancedBlock(LexicalMode currentMode, CssToken startToken)
: base("The block is unclosed, '}' expected", startToken.Position)
{
}
public UnexpectedTokenException(LexicalMode mode, TokenKind expectedKind, CssToken token)
: base($"Unexpected token at {token.Position} reading {mode}. Expected '{expectedKind}'. Was '{token.Kind}'.", token.Position)
{
this.token = token;
}
public void Enter(LexicalMode mode)
{
modes.Push(mode);
current = mode;
}
public LexicalModeContext(LexicalMode start)
{
this.current = start;
modes.Push(start);
}
// "Current mode is:" + current + ". Leaving " + mode + "."
public UnbalancedBlock(LexicalMode currentMode, CssToken startToken)
: base("The block is unclosed, '}' expected", startToken.Position)
{
}
public UnexpectedModeChange(LexicalMode currentMode, LexicalMode leavingMode, int position)
: base($"Unexpected mode change. Expected {currentMode}. Was {leavingMode}.")
{
this.position = position;
}
