Tabs: Support URL-based credentials

When credentials are provided directly in the URL, e.g.:

    https://username:password@www.example.com/

`location.href` strips out the auth part, but anchor links contain them, making
our `isLocal` computation broken. This fixes it by only looking at `origin`,
`pathname` & `search`.

Fixes gh-2213

Author: mgol

tests/unit/tabs/core.js

@@ -747,4 +747,30 @@ QUnit.test( "extra listeners created when tabs are added/removed (trac-15136)",
 		"No extra listeners after removing all the extra tabs" );
 } );
 
+QUnit.test( "URL-based auth with local tabs (gh-2213)", function( assert ) {
+	assert.expect( 1 );
+
+	var origAjax = $.ajax,
+		element = $( "#tabs1" ),
+		anchor = element.find( "a[href='#fragment-3']" ),
+		url = new URL( anchor.prop( "href" ) );
+
+	try {
+		$.ajax = function() {
+			throw new Error( "Unexpected AJAX call; all tabs are local!" );
+		};
+
+		anchor.attr( "href", url.protocol + "//username:password@" + url.host +
+			url.pathname + url.search + url.hash );
+
+		element.tabs();
+		anchor.trigger( "click" );
+
+		assert.strictEqual( element.tabs( "option", "active" ), 2,
+			"should set the active option" );
+	} finally {
+		$.ajax = origAjax;
+	}
+} );
+
 } );

ui/widgets/tabs.js

@@ -61,26 +61,19 @@ $.widget( "ui.tabs", {
 		load: null
 	},
 
-	_isLocal: ( function() {
-		var rhash = /#.*$/;
-
-		return function( anchor ) {
-			var anchorUrl, locationUrl;
-
-			anchorUrl = anchor.href.replace( rhash, "" );
-			locationUrl = location.href.replace( rhash, "" );
-
-			// Decoding may throw an error if the URL isn't UTF-8 (#9518)
-			try {
-				anchorUrl = decodeURIComponent( anchorUrl );
-			} catch ( _error ) {}
-			try {
-				locationUrl = decodeURIComponent( locationUrl );
-			} catch ( _error ) {}
-
-			return anchor.hash.length > 1 && anchorUrl === locationUrl;
-		};
-	} )(),
+	_isLocal: function( anchor ) {
+		var anchorUrl = new URL( anchor.href ),
+			locationUrl = new URL( location.href );
+
+		return anchor.hash.length > 1 &&
+
+			// `href` may contain a hash but also username & password;
+			// we want to ignore them, so we check the three fields
+			// below instead.
+			anchorUrl.origin === locationUrl.origin &&
+			anchorUrl.pathname === locationUrl.pathname &&
+			anchorUrl.search === locationUrl.search;
+	},
 
 	_create: function() {
 		var that = this,