MulleScion bidirectional

MulleScion+VariableIO.m

//
// Allow bidirectional communication with the template. After the template has run, you can pick out
// the global variables from `variables`. Might do this as a "standard" in the next version
//
@implementation MulleScionTemplate( VariableIO)

- (NSString *) descriptionWithTemplateFile:(NSObject <MulleScionStringOrURL> *) filename
                                dataSource:(id) dataSource
                        readWriteVariables:(NSMutableDictionary *) variables
{
   MulleScionTemplate   *template;
   NSAutoreleasePool    *pool;
   NSMutableDictionary  *tmp;
   NSMutableString      *output;
   
   template = [[[MulleScionTemplate alloc] initWithContentsOfFile:filename] autorelease];
   if( ! template)
      return( nil);

   pool = [NSAutoreleasePool new];
   {
      output = [[NSMutableString alloc] initWithCapacity:0x8000];
      
      tmp = [template localVariablesWithDefaultValues:variables];
      [variables setDictionary:tmp];
      
      [template renderInto:output
            localVariables:variables
                dataSource:dataSource];
   }
   [pool release];
   return( [output autorelease]);
}
@end