Fix #10544. Remove deprecated .data() event namespaced triggering.

Data events were horribly slow, never documented, and caused strange interpretation of data items with dots in them.

src/data.js

@@ -232,7 +232,7 @@ jQuery.extend({
 
 jQuery.fn.extend({
 	data: function( key, value ) {
-		var parts, part, attr, name, l,
+		var attrs, name,
 			elem = this[0],
 			i = 0,
 			data = null;
@@ -243,9 +243,9 @@ jQuery.fn.extend({
 				data = jQuery.data( elem );
 
 				if ( elem.nodeType === 1 && !jQuery._data( elem, "parsedAttrs" ) ) {
-					attr = elem.attributes;
-					for ( l = attr.length; i < l; i++ ) {
-						name = attr[i].name;
+					attrs = elem.attributes;
+					for ( ; i < attrs.length; i++ ) {
+						name = attrs[i].name;
 
 						if ( !name.indexOf( "data-" ) ) {
 							name = jQuery.camelCase( name.substring(5) );
@@ -267,33 +267,15 @@ jQuery.fn.extend({
 			});
 		}
 
-		parts = key.split( ".", 2 );
-		parts[1] = parts[1] ? "." + parts[1] : "";
-		part = parts[1] + "!";
-
 		return jQuery.access( this, function( value ) {
 
 			if ( value === undefined ) {
-				data = this.triggerHandler( "getData" + part, [ parts[0] ] );
-
 				// Try to fetch any internally stored data first
-				if ( data === undefined && elem ) {
-					data = jQuery.data( elem, key );
-					data = dataAttr( elem, key, data );
-				}
-
-				return data === undefined && parts[1] ?
-					this.data( parts[0] ) :
-					data;
+				return elem ? dataAttr( elem, key, jQuery.data( elem, key ) ) : null;
 			}
 
-			parts[1] = value;
 			this.each(function() {
-				var self = jQuery( this );
-
-				self.triggerHandler( "setData" + part, parts );
 				jQuery.data( this, key, value );
-				self.triggerHandler( "changeData" + part, parts );
 			});
 		}, null, value, arguments.length > 1, null, false );
 	},

src/event.js

@@ -195,14 +195,6 @@ jQuery.event = {
 		}
 	},
 
-	// Events that are safe to short-circuit if no handlers are attached.
-	// Native DOM events should not be added, they may have inline handlers.
-	customEvent: {
-		"getData": true,
-		"setData": true,
-		"changeData": true
-	},
-
 	trigger: function( event, data, elem, onlyHandlers ) {
 		// Don't do events on text and comment nodes
 		if ( elem && (elem.nodeType === 3 || elem.nodeType === 8) ) {
@@ -232,7 +224,7 @@ jQuery.event = {
 			namespaces.sort();
 		}
 
-		if ( (!elem || jQuery.event.customEvent[ type ]) && !jQuery.event.global[ type ] ) {
+		if ( !elem && !jQuery.event.global[ type ] ) {
 			// No jQuery handlers for this event type, and it can't have inline handlers
 			return;
 		}

test/unit/data.js

@@ -175,15 +175,10 @@ test(".data()", function() {
 });
 
 test(".data(String) and .data(String, Object)", function() {
-	expect(29);
+	expect( 12 );
 	var parent = jQuery("<div><div></div></div>"),
 		div = parent.children();
 
-	parent
-		.bind("getData", function(){ ok( false, "getData bubbled." ); })
-		.bind("setData", function(){ ok( false, "setData bubbled." ); })
-		.bind("changeData", function(){ ok( false, "changeData bubbled." ); });
-
 	ok( div.data("test") === undefined, "Check for no data exists" );
 
 	div.data("test", "success");
@@ -199,58 +194,6 @@ test(".data(String) and .data(String, Object)", function() {
 
 	ok( div.data("notexist") === undefined, "Check for no data exists" );
 
-	div.data("test", "overwritten");
-	var hits = {test:0}, gets = {test:0}, changes = {test:0, value:null};
-
-
-	function logChangeData(e,key,value) {
-		var dataKey = key;
-		if ( e.namespace ) {
-			dataKey = dataKey + "." + e.namespace;
-		}
-		changes[key] += value;
-		changes.value = jQuery.data(e.target, dataKey);
-	}
-
-	div
-		.bind("setData",function(e,key,value){ hits[key] += value; })
-		.bind("setData.foo",function(e,key,value){ hits[key] += value; })
-		.bind("changeData",logChangeData)
-		.bind("changeData.foo",logChangeData)
-		.bind("getData",function(e,key){ gets[key] += 1; })
-		.bind("getData.foo",function(e,key){ gets[key] += 3; });
-
-	div.data("test.foo", 2);
-	equal( div.data("test"), "overwritten", "Check for original data" );
-	equal( div.data("test.foo"), 2, "Check for namespaced data" );
-	equal( div.data("test.bar"), "overwritten", "Check for unmatched namespace" );
-	equal( hits.test, 2, "Check triggered setter functions" );
-	equal( gets.test, 5, "Check triggered getter functions" );
-	equal( changes.test, 2, "Check sets raise changeData");
-	equal( changes.value, 2, "Check changeData after data has been set" );
-
-	hits.test = 0;
-	gets.test = 0;
-	changes.test = 0;
-	changes.value = null;
-
-	div.data("test", 1);
-	equal( div.data("test"), 1, "Check for original data" );
-	equal( div.data("test.foo"), 2, "Check for namespaced data" );
-	equal( div.data("test.bar"), 1, "Check for unmatched namespace" );
-	equal( hits.test, 1, "Check triggered setter functions" );
-	equal( gets.test, 5, "Check triggered getter functions" );
-	equal( changes.test, 1, "Check sets raise changeData" );
-	equal( changes.value, 1, "Check changeData after data has been set" );
-
-	div
-		.bind("getData",function(e,key){ return key + "root"; })
-		.bind("getData.foo",function(e,key){ return key + "foo"; });
-
-	equal( div.data("test"), "testroot", "Check for original data" );
-	equal( div.data("test.foo"), "testfoo", "Check for namespaced data" );
-	equal( div.data("test.bar"), "testroot", "Check for unmatched namespace" );
-
 	// #3748
 	var $elem = jQuery({exists:true});
 	equal( $elem.data("nothing"), undefined, "Non-existent data returns undefined");