Core: Fill in context and selector properties for .live() support

Fixes #79

Ref jquery/jquery#1908

Author: dmethvin

src/core.js

@@ -8,7 +8,7 @@ var matched, browser,
 
 // $(html) "looks like html" rule change
 jQuery.fn.init = function( selector, context, rootjQuery ) {
-	var match;
+	var match, ret;
 
 	if ( selector && typeof selector === "string" && !jQuery.isPlainObject( context ) &&
 			(match = rquickExpr.exec( jQuery.trim( selector ) )) && match[ 0 ] ) {
@@ -31,11 +31,28 @@ jQuery.fn.init = function( selector, context, rootjQuery ) {
 			context = context.context;
 		}
 		if ( jQuery.parseHTML ) {
-			return oldInit.call( this, jQuery.parseHTML( match[ 2 ], context, true ),
+			return oldInit.call( this,
+					jQuery.parseHTML( match[ 2 ], context && context.ownerDocument || context, true ),
 					context, rootjQuery );
 		}
 	}
-	return oldInit.apply( this, arguments );
+
+	ret = oldInit.apply( this, arguments );
+
+	// Fill in selector and context properties so .live() works
+	if ( selector && selector.selector !== undefined ) {
+		// A jQuery object, copy its properties
+		ret.selector = selector.selector;
+		ret.context = selector.context;
+
+	} else {
+		ret.selector = typeof selector === "string" ? selector : "";
+		if ( selector ) {
+			ret.context = selector.nodeType? selector : context || document;
+		}
+	}
+
+	return ret;
 };
 jQuery.fn.init.prototype = jQuery.fn;
 

src/traversing.js

@@ -1,6 +1,14 @@
-var oldSelf = jQuery.fn.andSelf || jQuery.fn.addBack;
+var oldSelf = jQuery.fn.andSelf || jQuery.fn.addBack,
+	oldFind = jQuery.fn.find;
 
 jQuery.fn.andSelf = function() {
 	migrateWarn("jQuery.fn.andSelf() replaced by jQuery.fn.addBack()");
 	return oldSelf.apply( this, arguments );
 };
+
+jQuery.fn.find = function( selector ) {
+	var ret = oldFind.apply( this, arguments );
+	ret.context = this.context;
+	ret.selector = this.selector ? this.selector + " " + selector : selector;
+	return ret;
+};

test/core.js

@@ -47,6 +47,49 @@ test( "jQuery(html) loose rules", function() {
 	}
 });
 
+test( "selector state", function() {
+	expect( 18 );
+
+	var test;
+
+	test = jQuery( undefined );
+	equal( test.selector, "", "Empty jQuery Selector" );
+	equal( test.context, undefined, "Empty jQuery Context" );
+
+	test = jQuery( document );
+	equal( test.selector, "", "Document Selector" );
+	equal( test.context, document, "Document Context" );
+
+	test = jQuery( document.body );
+	equal( test.selector, "", "Body Selector" );
+	equal( test.context, document.body, "Body Context" );
+
+	test = jQuery("#qunit-fixture");
+	equal( test.selector, "#qunit-fixture", "#qunit-fixture Selector" );
+	equal( test.context, document, "#qunit-fixture Context" );
+
+	test = jQuery("#notfoundnono");
+	equal( test.selector, "#notfoundnono", "#notfoundnono Selector" );
+	equal( test.context, document, "#notfoundnono Context" );
+
+	test = jQuery( "#qunit-fixture", document );
+	equal( test.selector, "#qunit-fixture", "#qunit-fixture Selector" );
+	equal( test.context, document, "#qunit-fixture Context" );
+
+	test = jQuery( "#qunit-fixture", document.body );
+	equal( test.selector, "#qunit-fixture", "#qunit-fixture Selector" );
+	equal( test.context, document.body, "#qunit-fixture Context" );
+
+	// Test cloning
+	test = jQuery( test );
+	equal( test.selector, "#qunit-fixture", "#qunit-fixture Selector" );
+	equal( test.context, document.body, "#qunit-fixture Context" );
+
+	test = jQuery( document.body ).find("#qunit-fixture");
+	equal( test.selector, "#qunit-fixture", "#qunit-fixture find Selector" );
+	equal( test.context, document.body, "#qunit-fixture find Context" );
+});
+
 test( "XSS injection", function() {
 	expect( 10 );