Initial import of MonorailA11yFixes.

This makes headings for the issue title, comments and add comment section, as well as making the starred status accessible.

Author: jcsteh

MonorailA11yFixes.user.js

@@ -0,0 +1,54 @@
+// ==UserScript==
+// @name           Monorail Accessibility Fixes
+// @namespace      http://axSGrease.nvaccess.org/
+// @description    Improves the accessibility of Google Code.
+// @author James Teh <jamie@nvaccess.org>
+// @copyright 2016 NV Access Limited
+// @license GNU General Public License version 2.0
+// @version 2016.1
+// @include https://bugs.chromium.org/p/*/issues/*
+// ==/UserScript==
+
+function fixStar(node) {
+	node.setAttribute("role", "checkbox");
+	node.setAttribute("aria-checked",
+		(node.src.indexOf("star_on.gif") == -1) ? "false" : "true");
+}
+
+function makeHeading(elem, level) {
+	elem.setAttribute("role", "heading");
+	elem.setAttribute("aria-level", level);
+}
+
+function makeHeadings() {
+	// Title.
+	var elem = document.querySelector(".issueheader");
+	makeHeading(elem, 1);
+
+	// Comments.
+	for (elem of document.getElementsByClassName("issuecommentheader"))
+		makeHeading(elem, 2);
+
+	// Add a comment heading.
+	var elem = document.querySelector("#makechanges div.h4");
+	makeHeading(elem, 2);
+}
+
+var observer = new MutationObserver(function(mutations) {
+	mutations.forEach(function(mutation) {
+		try {
+			if (mutation.type === "attributes") {
+				if (mutation.attributeName == "src" && mutation.target.id == "star")
+					fixStar(mutation.target);
+			}
+		} catch (e) {
+			// Catch exceptions for individual mutations so other mutations are still handled.
+			GM_log("Exception while handling mutation: " + e);
+		}
+	});
+});
+observer.observe(document, {attributes: true,
+	subtree: true, attributeFilter: ["src"]});
+
+fixStar(document.getElementById("star"));
+makeHeadings();