- var dataTypes = arg1.split( /\s+/ ),
- functor = arg2,
- dataType,
- list,
- placeBefore;
-
- // For each dataType in the dataTypeExpression
- for( i = 0 , length = dataTypes.length ; i < length ; i++ ) {
- dataType = dataTypes[ i ];
- // We control if we're asked to add before
- // any existing element
- placeBefore = /^\+/.test( dataType );
- if ( placeBefore ) {
- dataType = dataType.substr( 1 );
+ // Check to see if we have a response for the expected dataType
+ if ( dataTypes[ 0 ] in responses ) {
+ finalDataType = dataTypes[ 0 ];
+ } else {
+ // Try convertible dataTypes
+ for ( type in responses ) {
+ if ( ! dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
+ finalDataType = type;
+ break;
+ }
+ if ( ! firstDataType ) {
+ firstDataType = type;
+ }
+ }
+ // Or just use first one
+ finalDataType = finalDataType || firstDataType;
+ }
+
+ // If we found a dataType
+ // We add the dataType to the list if needed
+ // and return the corresponding response
+ if ( finalDataType ) {
+ if ( finalDataType !== dataTypes[ 0 ] ) {
+ dataTypes.unshift( finalDataType );
+ }
+ return responses[ finalDataType ];
+ }
+}
+
+// Chain conversions given the request and the original response
+function ajaxConvert( s, response ) {
+
+ // Apply the dataFilter if provided
+ if ( s.dataFilter ) {
+ response = s.dataFilter( response, s.dataType );
+ }
+
+ var dataTypes = s.dataTypes,
+ converters = s.converters,
+ i,
+ length = dataTypes.length,
+ tmp,
+ // Current and previous dataTypes
+ current = dataTypes[ 0 ],
+ prev,
+ // Conversion expression
+ conversion,
+ // Conversion function
+ conv,
+ // Conversion functions (when text is used in-between)
+ conv1,
+ conv2;
+
+ // For each dataType in the chain
+ for( i = 1; i < length; i++ ) {
+
+ // Get the dataTypes
+ prev = current;
+ current = dataTypes[ i ];
+
+ // If current is auto dataType, update it to prev
+ if( current === "*" ) {
+ current = prev;
+ // If no auto and dataTypes are actually different
+ } else if ( prev !== "*" && prev !== current ) {
+
+ // Get the converter
+ conversion = prev + " " + current;
+ conv = converters[ conversion ] || converters[ "* " + current ];
+
+ // If there is no direct converter, search transitively
+ if ( ! conv ) {
+ conv2 = undefined;
+ for( conv1 in converters ) {
+ tmp = conv1.split( " " );
+ if ( tmp[ 0 ] === prev || tmp[ 0 ] === "*" ) {
+ conv2 = converters[ tmp[1] + " " + current ];
+ if ( conv2 ) {
+ conv1 = converters[ conv1 ];
+ if ( conv1 === true ) {
+ conv = conv2;
+ } else if ( conv2 === true ) {
+ conv = conv1;
+ }
+ break;
+ }
+ }