Added a new tidyOptionIsList() API service.

include/tidy.h

@@ -708,10 +708,16 @@ TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetName( TidyOption opt );
 
 /** Get datatype of given Option
  ** @param opt An instance of a TidyOption to query.
- ** @result the TidyOptionType of the given option.
+ ** @result The TidyOptionType of the given option.
  */
 TIDY_EXPORT TidyOptionType TIDY_CALL tidyOptGetType( TidyOption opt );
 
+/** Indicates that an option takes a list of items.
+ ** @param opt An instance of a TidyOption to query.
+ ** @result A bool indicating whether or not the option accepts a list.
+ */
+TIDY_EXPORT Bool TIDY_CALL tidyOptionIsList( TidyOption opt );
+
 /** Is Option read-only? Some options (mainly internal use only options) are
  ** read-only.
  ** @deprecated This is no longer a valid test for the public API; instead

src/config.c

@@ -342,6 +342,11 @@ const TidyOptionImpl* TY_(getOption)( TidyOptionId optId )
   return NULL;
 }
 
+const Bool TY_(getOptionIsList)( TidyOptionId optId )
+{
+    const TidyOptionImpl* option = TY_(getOption)( optId );
+    return option->parser == ParseList;
+}
 
 static void FreeOptionValue( TidyDocImpl* doc, const TidyOptionImpl* option, TidyOptionValue* value )
 {

src/config.h

@@ -149,6 +149,11 @@ const TidyOptionImpl* TY_(lookupOption)( ctmbstr optnam );
  */
 const TidyOptionImpl* TY_(getOption)( TidyOptionId optId );
 
+/** Given an option ID, indicates whether or not the option is a list.
+ ** @param optId The option ID to check.
+ ** @returns Returns yes if the option value is a list.
+ */
+const Bool TY_(getOptionIsList)( TidyOptionId optId );
 
 /** Initiates an iterator to cycle through all of the available options.
  ** @param doc The Tidy document to get options.

src/tidylib.c

@@ -357,6 +357,13 @@ TidyOptionType TIDY_CALL tidyOptGetType( TidyOption topt )
         return option->type;
     return (TidyOptionType) -1;
 }
+Bool TIDY_CALL           tidyOptionIsList( TidyOption opt )
+{
+    const TidyOptionImpl* option = tidyOptionToImpl( opt );
+    if ( option )
+        return TY_(getOptionIsList)( option->id );
+    return no;
+}
 TidyConfigCategory TIDY_CALL tidyOptGetCategory( TidyOption topt )
 {
     const TidyOptionImpl* option = tidyOptionToImpl( topt );