1 files changed, 56 insertions, 0 deletions
diff --git a/browser/installer/windows/nsis/content/installing.js b/browser/installer/windows/nsis/content/installing.js
new file mode 100644
index 0000000000..97105cf6df
--- /dev/null
+++ b/browser/installer/windows/nsis/content/installing.js
@@ -0,0 +1,56 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// Length of time (milliseconds) that one blurb stays up before we switch to
+// displaying the next one.
+var BLURB_CYCLE_MS = 20000;
+
+// How frequently we should update the progress bar state, in milliseconds.
+var PROGRESS_BAR_INTERVAL_MS = 250;
+
+window.attachEvent("onload", function () {
+  // Set direction on the two components of the layout.
+  var direction = external.getTextDirection();
+  document.getElementById("text_column").style.direction = direction;
+  document.getElementById("installing").style.direction = direction;
+
+  // Get this page's static strings.
+  var label = document.getElementById("label");
+  label.innerText = external.getUIString("installing_label");
+  document.getElementById("header").innerText =
+    external.getUIString("installing_header");
+  document.getElementById("content").innerText =
+    external.getUIString("installing_content");
+
+  // Poll and update the progress bar percentage.
+  setInterval(function () {
+    var percent = external.getProgressBarPercent();
+    var progressBar = document.getElementById("progress_bar");
+    progressBar.setAttribute("aria-valuenow", percent);
+    progressBar.style.width = percent + "%";
+  }, PROGRESS_BAR_INTERVAL_MS);
+
+  // Get the blurb strings and initialize the blurb rotation.
+  var currentBlurb = 0;
+  // IE8 adds undefined to the array if there is a trailing comma in an
+  // array literal, so don't allow prettier to add one here.
+  // prettier-ignore
+  var blurbStrings = [
+    external.getUIString("installing_blurb_0"),
+    external.getUIString("installing_blurb_1"),
+    external.getUIString("installing_blurb_2")
+  ];
+  function rotateBlurb() {
+    document.getElementById("blurb").innerText = blurbStrings[currentBlurb];
+    currentBlurb = (currentBlurb + 1) % blurbStrings.length;
+  }
+  rotateBlurb();
+  setInterval(rotateBlurb, BLURB_CYCLE_MS);
+
+  // Focus the label, in order to get the focus in the web page, to
+  // assist screen readers. On Win 7's IE8 this causes the focus rectangle
+  // to be immediately visible, so also hide that here.
+  label.className += " no-focus-outline";
+  label.focus();
+});