// Parse an At Rule
func (parser *Parser) parseAtRule() (*css.Rule, error) {
// parse rule name (eg: "@import")
token := parser.shiftToken()
result := css.NewRule(css.AtRule)
result.Name = token.Value
for parser.tokenParsable() {
if parser.tokenChar(";") {
parser.shiftToken()
// finished
break
} else if parser.tokenChar("{") {
if result.EmbedsRules() {
// parse rules block
rules, err := parser.ParseRules()
if err != nil {
return result, err
}
result.Rules = rules
} else {
// parse declarations block
declarations, err := parser.ParseDeclarations()
if err != nil {
return result, err
}
result.Declarations = declarations
}
// finished
break
} else {
// parse prelude
prelude, err := parser.parsePrelude()
if err != nil {
return result, err
}
result.Prelude = prelude
}
}
// log.Printf("[parsed] Rule: %s", result.String())
return result, parser.err()
}
// Parse a Qualified Rule
func (parser *Parser) parseQualifiedRule() (*css.Rule, error) {
result := css.NewRule(css.QualifiedRule)
for parser.tokenParsable() {
if parser.tokenChar("{") {
if result.Prelude == "" {
errMsg := fmt.Sprintf("Unexpected { character: %s", parser.nextToken().String())
return result, errors.New(errMsg)
}
// parse declarations block
declarations, err := parser.ParseDeclarations()
if err != nil {
return result, err
}
result.Declarations = declarations
// finished
break
} else {
// parse prelude
prelude, err := parser.parsePrelude()
if err != nil {
return result, err
}
result.Prelude = prelude
}
}
result.Selectors = strings.Split(result.Prelude, ",")
for i, sel := range result.Selectors {
result.Selectors[i] = strings.TrimSpace(sel)
}
// log.Printf("[parsed] Rule: %s", result.String())
return result, parser.err()
}