/// <summary>
/// (BNF) ruleset : selector? '{' S* declaration? [ ';' S* declaration? ]* '}' S*;
/// </summary>
/// <returns></returns>
private CssRuleSet ParseRuleSet()
{
char ch;
CssRuleSet ruleSet = new CssRuleSet();
ParseSelectors:
while (true)
{
try
{
CssSelector selector = this.ParseSelector();
if (selector == null)
{
break;
}
ruleSet.Selectors.Add(selector);
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch))
{
// restabalize on next rulset
switch (ch)
{
case ',':
{
// continue parsing rest of Selectors
goto ParseSelectors;
}
case '{':
{
goto ParseDeclarations;
}
//case ':':// keep going
case ';':
case '}':
{
throw new SyntaxError("Invalid selector list", this.reader.FilePath, this.reader.Line, this.reader.Column);
}
}
}
}
}
ParseDeclarations:
while (true)
{
try
{
CssDeclaration declaration = this.ParseDeclaration();
if (declaration == null)
{
break;
}
ruleSet.Declarations.Add(declaration);
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch))
{
// restabalize on next declaration
switch (ch)
{
case '{':
{
throw new SyntaxError("Invalid ruleset", this.reader.FilePath, this.reader.Line, this.reader.Column);
}
//case ':':// keep going
case ';':
{
// continue parsing rest of delcarations
goto ParseDeclarations;
}
case '}':
{
// no more declarations
return ruleSet;
}
}
}
}
}
return ruleSet;
}
/*
* /// <summary>
* /// (BNF) block : '{' S* [ any | block | ATKEYWORD S* | ';' S* ]* '}' S*;
* /// </summary>
* /// <returns></returns>
* private CssBlock ParseBlock()
* {
* CssBlock block = new CssBlock();
* int start = this.Position;// start with current char
*
* char ch;
* while (this.Read(out ch))
* {
* switch (ch)
* {
* case '@':
* {
* // copy anything before
* string value = this.Copy(start);
* if (value != null && !String.IsNullOrEmpty(value = value.Trim()))
* {
* CssString any = new CssString();
* any.Value = value;
* block.Values.Add(any);
* }
*
* // parse inner block
* CssAtRule atRule = this.ParseAtRule();
* block.Values.Add(atRule);
*
* // reset start with current char
* start = this.Position;
* break;
* }
* case '{':
* {
* // copy anything before
* string value = this.Copy(start);
* if (value != null && !String.IsNullOrEmpty(value = value.Trim()))
* {
* CssString any = new CssString();
* any.Value = value;
* block.Values.Add(any);
* }
*
* // parse inner block
* CssBlock innerBlock = this.ParseBlock();
* block.Values.Add(innerBlock);
*
* // reset start with current char
* start = this.Position;
* break;
* }
* case '}':
* {
* // copy anything before
* string value = this.Copy(start);
* if (value != null && !String.IsNullOrEmpty(value = value.Trim()))
* {
* CssString any = new CssString();
* any.Value = value;
* block.Values.Add(any);
* }
*
* return block;
* }
* }
* }
*
* throw new UnexpectedEndOfFile("Unclosed block", this.reader.FilePath, this.reader.Line, this.reader.Column);
* }
*/
#endregion Block
#region RuleSet
/// <summary>
/// (BNF) ruleset : selector? '{' S* declaration? [ ';' S* declaration? ]* '}' S*;
/// </summary>
/// <returns></returns>
private CssRuleSet ParseRuleSet()
{
char ch;
CssRuleSet ruleSet = new CssRuleSet();
ParseSelectors:
while (true)
{
try
{
CssSelector selector = this.ParseSelector();
if (selector == null)
{
break;
}
ruleSet.Selectors.Add(selector);
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch))
{
// restabalize on next rulset
switch (ch)
{
case ',':
{
// continue parsing rest of Selectors
goto ParseSelectors;
}
case '{':
{
goto ParseDeclarations;
}
//case ':':// keep going
case ';':
case '}':
{
throw new SyntaxError("Invalid selector list", this.reader.FilePath, this.reader.Line, this.reader.Column);
}
}
}
}
}
ParseDeclarations:
while (true)
{
try
{
CssDeclaration declaration = this.ParseDeclaration();
if (declaration == null)
{
break;
}
ruleSet.Declarations.Add(declaration);
}
catch (ParseException ex)
{
this.errors.Add(ex);
while (this.Read(out ch))
{
// restabalize on next declaration
switch (ch)
{
case '{':
{
throw new SyntaxError("Invalid ruleset", this.reader.FilePath, this.reader.Line, this.reader.Column);
}
//case ':':// keep going
case ';':
{
// continue parsing rest of delcarations
goto ParseDeclarations;
}
case '}':
{
// no more declarations
return(ruleSet);
}
}
}
}
}
return(ruleSet);
}
