Added ariaRole and ariaState to ui.core with tests.

Added ARIA role and state to ui.dialog
Fixes #3350
(Inspired by jARIA plugin from Chris Hoffman)

tests/core.html

@@ -65,6 +65,7 @@
 		<input id="input4-3" tabindex="-1" />
 		<input id="input4-4" tabindex="-50" />
 	</div>
+	<div id="aria"></div>
 </div>
 
 </body>

tests/core.js

@@ -53,4 +53,19 @@ test("tabbable - tabindex", function() {
 	ok(!$('#input4-4').is(':tabbable'), 'input, tabindex -50');
 });
 
+test("aria", function() {
+	expect(10);
+	
+	ok(!$('#aria').attr('role'), 'role is empty via attr');
+	ok(!$('#aria').ariaRole(), 'role is empty via ariaRole');
+	equals($('#aria').ariaRole('dialog').attr('role').replace(/^wairole:/, ""), 'dialog', 'role is dialog');
+	equals($('#aria').ariaRole(), 'dialog', 'role is dialog');
+	equals($('#aria').ariaRole('tablist').attr('role').replace(/^wairole:/, ""), 'tablist', 'role is tablist via attr');
+	equals($('#aria').ariaRole(), 'tablist', 'role is tablist via ariaRole');
+	ok(!$('#aria').attr('expanded'), 'state expanded absent via attr');
+	ok(!$('#aria').ariaState('expanded'), 'state expanded absent via ariaState');
+	equals($('#aria').ariaState('expanded', 'true').ariaState('expanded'), 'true', 'aria expanded is true');
+	equals($('#aria').ariaState('expanded', 'false').ariaState('expanded'), 'false', 'aria expanded is false');
+});
+
 })(jQuery);

ui/ui.core.js

@@ -437,4 +437,31 @@ $.ui.mouse.defaults = {
 	delay: 0
 };
 
+
+// WAI-ARIA Semantics
+var isFF2 = $.browser.mozilla && (parseFloat($.browser.version) < 1.9);
+$.fn.extend({
+	ariaRole : function(role) {
+		// setter?
+		if (role) {
+			return this.each(function(i, el) {
+				$(el).attr("role", isFF2 ? "wairole:" + role : role);
+			});
+		}
+		// getter just returns first jquery member's role string
+		return (this.eq(0).attr("role") || "").replace(/^wairole:/, "");
+	},
+	
+	ariaState : function(state, value) {
+		// setter?
+		if (value) 
+			return this.each(function(i, el) {
+				isFF2? el.setAttributeNS("http://www.w3.org/2005/07/aaa", "aaa:" + state, value) :
+					$(el).attr("aria-" + state, value);
+			});
+		// getter
+		return this.attr(isFF2? "aaa:"+state : "aria-" + state);
+	}
+});
+
 })(jQuery);

ui/ui.dialog.js

@@ -84,6 +84,8 @@ $.widget("ui.dialog", {
 					(options.closeOnEscape && ev.keyCode
 						&& ev.keyCode == $.keyCode.ESCAPE && self.close());
 				})
+				.ariaRole("dialog")
+				.ariaState("labelledby", titleId)
 				.mousedown(function() {
 					self._moveToTop();
 				}),