Bug 1387057 - improved accessibliity of onboarding notification bar. r=mossop

MozReview-Commit-ID: Hx60C142g3u

browser/extensions/onboarding/content/onboarding.css

@@ -329,7 +329,8 @@
 
 /* Keyboard focus specific outline */
 .onboarding-tour-action-button:-moz-focusring,
-#onboarding-tour-list .onboarding-tour-item:focus {
+#onboarding-tour-list .onboarding-tour-item:focus,
+#onboarding-notification-action-btn:-moz-focusring {
   outline: 2px solid rgba(0,149,221,0.5);
   outline-offset: 1px;
   -moz-outline-radius: 2px;
@@ -499,7 +500,7 @@
   --height: 22px;
   --vpadding: 3px;
   position: absolute;
-  content: attr(data-tooltip);
+  content: attr(aria-label);
   top: 0;
   offset-inline-start: 73px;
   line-height: calc(var(--height) - var(--vpadding) * 2);
@@ -541,6 +542,7 @@
 
 #onboarding-notification-tour-title {
   margin: 0;
+  font-weight: bold;
 }
 
 #onboarding-notification-tour-icon {

browser/extensions/onboarding/content/onboarding.js

@@ -929,17 +929,19 @@ class Onboarding {
   }
 
   _renderNotificationBar() {
-    let div = this._window.document.createElement("div");
-    div.id = "onboarding-notification-bar";
+    let footer = this._window.document.createElement("footer");
+    footer.id = "onboarding-notification-bar";
+    footer.setAttribute("aria-live", "polite");
+    footer.setAttribute("aria-labelledby", "onboarding-notification-icon")
     // We use `innerHTML` for more friendly reading.
     // The security should be fine because this is not from an external input.
-    div.innerHTML = `
-      <div id="onboarding-notification-icon"></div>
-      <section id="onboarding-notification-message-section">
-        <div id="onboarding-notification-tour-icon"></div>
-        <div id="onboarding-notification-body">
-          <h6 id="onboarding-notification-tour-title"></h6>
-          <span id="onboarding-notification-tour-message"></span>
+    footer.innerHTML = `
+      <div id="onboarding-notification-icon" role="presentation"></div>
+      <section id="onboarding-notification-message-section" role="presentation">
+        <div id="onboarding-notification-tour-icon" role="presentation"></div>
+        <div id="onboarding-notification-body" role="presentation">
+          <h1 id="onboarding-notification-tour-title"></h1>
+          <p id="onboarding-notification-tour-message"></p>
         </div>
         <button id="onboarding-notification-action-btn"></button>
       </section>
@@ -949,12 +951,15 @@ class Onboarding {
       this._tourType === "new" ? "onboarding.notification-icon-tool-tip" :
                                  "onboarding.notification-icon-tooltip-updated",
       [BRAND_SHORT_NAME], 1);
-    div.querySelector("#onboarding-notification-icon").setAttribute("data-tooltip", toolTip);
 
-    let closeBtn = div.querySelector("#onboarding-notification-close-btn");
+    let icon = footer.querySelector("#onboarding-notification-icon");
+    icon.setAttribute("aria-label", toolTip);
+    icon.setAttribute("role", "presentation");
+
+    let closeBtn = footer.querySelector("#onboarding-notification-close-btn");
     closeBtn.setAttribute("title",
       this._bundle.GetStringFromName("onboarding.notification-close-button-tooltip"));
-    return div;
+    return footer;
   }
 
   hide() {

browser/extensions/onboarding/test/browser/browser_onboarding_accessibility.js

@@ -93,3 +93,37 @@ add_task(async function test_onboarding_overlay_dialog() {
 
   await BrowserTestUtils.removeTab(tab);
 });
+
+add_task(async function test_onboarding_notification_bar() {
+  resetOnboardingDefaultState();
+  skipMuteNotificationOnFirstSession();
+
+  let tab = await openTab(ABOUT_NEWTAB_URL);
+  await promiseOnboardingOverlayLoaded(tab.linkedBrowser);
+  await promiseTourNotificationOpened(tab.linkedBrowser);
+
+  info("Test accessibility and semantics of the notification bar");
+  await ContentTask.spawn(tab.linkedBrowser, {}, function() {
+    let doc = content.document;
+    let footer = doc.getElementById("onboarding-notification-bar");
+    let icon = doc.getElementById("onboarding-notification-icon")
+
+    is(footer.getAttribute("aria-live"), "polite",
+      "Notification bar should be a live region");
+    is(footer.getAttribute("aria-labelledby"), icon.id,
+      "Notification bar should be labelled by the notification icon text");
+    ok(icon.getAttribute("aria-label"),
+      "Notification icon should have a text alternative");
+    // Presentational elements
+    [
+      "onboarding-notification-icon",
+      "onboarding-notification-message-section",
+      "onboarding-notification-tour-icon",
+      "onboarding-notification-body"
+    ].forEach(id =>
+      is(doc.getElementById(id).getAttribute("role"), "presentation",
+        "Element is only used for presentation"));
+  });
+
+  await BrowserTestUtils.removeTab(tab);
+});