Removed dataCheckers, added true as possible value for dataConverters…

… indicating dataType equivalence (ie. no conversion has to be performed).

src/ajax.js

@@ -212,31 +212,6 @@ jQuery.extend({
 		// 3) selection will start with transport dataType and THEN go to "*" if needed
 		transports: {},
 
-		// Checkers
-		// 1) key is dataType
-		// 2) they are called to control successful response
-		// 3) error throws is used as error data
-		dataCheckers: {
-
-			// Check if data is a string
-			"text": function(data) {
-				if ( typeof data != "string" ) {
-					jQuery.error("typeerror");
-				}
-			},
-
-			// Check if xml has been properly parsed
-			"xml": function(data) {
-				var documentElement = data ? data.documentElement : data;
-				if ( ! documentElement || ! documentElement.nodeName ) {
-					jQuery.error("typeerror");
-				}
-				if ( documentElement.nodeName == "parsererror" ) {
-					jQuery.error("parsererror");
-				}
-			}
-		},
-
 		// List of data converters
 		// 1) key format is "source_type destination_type" (a single space in-between)
 		// 2) the catchall symbol "*" can be used for source_type
@@ -245,8 +220,8 @@ jQuery.extend({
 			// Convert anything to text
 			"* text": window.String,
 
-			// Text to html (no transformation)
-			"text html": window.String,
+			// Text to html (true = no transformation)
+			"text html": true,
 
 			// Evaluate text as a json expression
 			"text json": jQuery.parseJSON,

src/xhr.js

@@ -231,7 +231,6 @@ jQuery.xhr = function( _native ) {
 						oneConv,
 						convertion,
 						dataTypes = s.dataTypes,
-						dataCheckers = s.dataCheckers,
 						dataConverters = s.dataConverters,
 						dataFilter = s.dataFilter,
 						responses = {
@@ -243,51 +242,40 @@ jQuery.xhr = function( _native ) {
 
 						current = dataTypes[ i ];
 
+						if ( responses[ current ] ) {
+							xhr[ "response" + responses[ current ] ] = response;
+							responses[ current ] = 0;
+						}
+
 						if ( i ) {
 
-							prev = dataTypes[ i - 1 ];
-
-							if ( prev === "*" ) {
-
-								prev = current;
-
-							} else if ( current !== "*" && prev !== current ) {
+							if ( prev !== "*" && current !== "*" && prev !== current ) {
 
 								oneConv = conv1 = 
 									dataConverters[ ( conversion = prev + " " + current ) ] ||
 									dataConverters[ "* " + current ];
 
-								if ( ! oneConv && prev !== "text" && current !== "text" ) {
-									conv1 = dataConverters[ prev + " text" ] || dataConverters[ "* text" ];
-									conv2 = dataConverters[ "text " + current ];
-								}
-								if ( oneConv || conv1 && conv2 ) {
-									response = oneConv ? conv1( response ) : conv2( conv1( response ) );
-								} else {
-									throw "no " + conversion;
+								if ( oneConv !== true ) {
+
+									if ( ! oneConv && prev !== "text" && current !== "text" ) {
+										conv1 = dataConverters[ prev + " text" ] || dataConverters[ "* text" ];
+										conv2 = dataConverters[ "text " + current ];
+									}
+
+									if ( oneConv || conv1 && conv2 ) {
+										response = oneConv ? conv1( response ) : conv2( conv1( response ) );
+									} else {
+										throw "no " + conversion;
+									}
 								}
 							}
-						}
-
-						checker = dataCheckers[ current ];
-
-						if ( response != null && checker ) {
-							checker( response );
-						}
-
-						if ( responses[ current ] ) {
-							xhr[ "response" + responses[ current ] ] = response;
-							responses[ current ] = 0;
-						}
-
-						if ( ! i && dataFilter ) {
-
-							response = dataFilter( response );
+						} else if ( dataFilter ) {
 
+							response = s.dataFilter( response );
 							dataTypes = s.dataTypes;
-							dataFilter = 0;
-							i--;
 						}
+
+						prev = current;
 					}
 
 					// We have a real success