/// <summary>
/// (BNF) at-rule : ATKEYWORD S* any* [ block | ';' S* ];
/// </summary>
/// <returns></returns>
/// <remarks>
/// NOTE: each at-rule might parse differently according to CSS3
/// The @media block for example contains a block of statements
/// while other at-rules with a block contain a block of declarations
/// </remarks>
private CssAtRule ParseAtRule()
{
CssAtRule atRule = new CssAtRule();
int start = this.Position+1;// start with first char of ident
char ch;
while (this.Read(out ch) && !Char.IsWhiteSpace(ch))
{
// continue consuming
}
atRule.Ident = this.Copy(start);
while (this.Read(out ch) && Char.IsWhiteSpace(ch))
{
// consuming whitespace
}
start = this.Position;// start with current char
do
{
switch (ch)
{
case '{': //Block Begin
{
atRule.Value = this.Copy(start);
bool containsRuleSets = String.Equals(atRule.Ident, CssAtRule.MediaIdent, StringComparison.Ordinal);
while (true)
{
while (this.Read(out ch) && Char.IsWhiteSpace(ch))
{
// consume whitespace
}
if (ch == '}')
{
break;
}
try
{
if (containsRuleSets)
{
// includes @media
CssStatement statement = this.ParseStatement();
atRule.Block.Values.Add(statement);
}
else
{
// includes @font-face, @page
this.PutBack();
CssDeclaration declaration = this.ParseDeclaration();
atRule.Block.Values.Add(declaration);
}
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch) && ch != '}')
{
// restabilize on block end
}
break;
}
}
return atRule;
}
case ';': //At-Rule End
{
atRule.Value = this.Copy(start);
return atRule;
}
}
} while (this.Read(out ch));
throw new UnexpectedEndOfFile("Unclosed At-Rule", this.reader.FilePath, this.reader.Line, this.reader.Column);
}
/// <summary>
/// (BNF) at-rule : ATKEYWORD S* any* [ block | ';' S* ];
/// </summary>
/// <returns></returns>
/// <remarks>
/// NOTE: each at-rule might parse differently according to CSS3
/// The @media block for example contains a block of statements
/// while other at-rules with a block contain a block of declarations
/// </remarks>
private CssAtRule ParseAtRule()
{
CssAtRule atRule = new CssAtRule();
int start = this.Position + 1; // start with first char of ident
char ch;
while (this.Read(out ch) && !Char.IsWhiteSpace(ch))
{
// continue consuming
}
atRule.Ident = this.Copy(start);
while (this.Read(out ch) && Char.IsWhiteSpace(ch))
{
// consuming whitespace
}
start = this.Position; // start with current char
do
{
switch (ch)
{
case '{': //Block Begin
{
atRule.Value = this.Copy(start);
bool containsRuleSets = String.Equals(atRule.Ident, CssAtRule.MediaIdent, StringComparison.Ordinal);
while (true)
{
while (this.Read(out ch) && Char.IsWhiteSpace(ch))
{
// consume whitespace
}
if (ch == '}')
{
break;
}
try
{
if (containsRuleSets)
{
// includes @media
CssStatement statement = this.ParseStatement();
atRule.Block.Values.Add(statement);
}
else
{
// includes @font-face, @page
this.PutBack();
CssDeclaration declaration = this.ParseDeclaration();
atRule.Block.Values.Add(declaration);
}
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch) && ch != '}')
{
// restabilize on block end
}
break;
}
}
return(atRule);
}
case ';': //At-Rule End
{
atRule.Value = this.Copy(start);
return(atRule);
}
}
} while (this.Read(out ch));
throw new UnexpectedEndOfFile("Unclosed At-Rule", this.reader.FilePath, this.reader.Line, this.reader.Column);
}