From 13b45aa6c66c8075acc95ea94d8c5cbc24a3a203 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume.gomez@huawei.com>
Date: Wed, 4 May 2022 15:39:18 +0200
Subject: [PATCH] Add rotation animation on settings button when loading

---
 src/librustdoc/html/static/css/rustdoc.css | 12 ++++++++++++
 src/librustdoc/html/static/js/main.js      |  2 +-
 src/librustdoc/html/static/js/settings.js  |  1 +
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index 81c12be8e83c0..12059e0b9c4b5 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1401,6 +1401,18 @@ pre.rust {
 	cursor: pointer;
 }
 
+@keyframes rotating {
+	from {
+		transform: rotate(0deg);
+	}
+	to {
+		transform: rotate(360deg);
+	}
+}
+#settings-menu.rotate img {
+	animation: rotating 2s linear infinite;
+}
+
 #help-button {
 	font-family: "Fira Sans", Arial, sans-serif;
 	text-align: center;
diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js
index 1dfd9c762c46e..1f41d62bde346 100644
--- a/src/librustdoc/html/static/js/main.js
+++ b/src/librustdoc/html/static/js/main.js
@@ -300,8 +300,8 @@ function loadCss(cssFileName) {
         document.head.append(script);
     }
 
-
     getSettingsButton().onclick = event => {
+        addClass(getSettingsButton(), "rotate");
         event.preventDefault();
         loadScript(window.settingsJS);
     };
diff --git a/src/librustdoc/html/static/js/settings.js b/src/librustdoc/html/static/js/settings.js
index 43b24245ab2e8..04c64cbb54846 100644
--- a/src/librustdoc/html/static/js/settings.js
+++ b/src/librustdoc/html/static/js/settings.js
@@ -272,5 +272,6 @@
         if (!isSettingsPage) {
             switchDisplayedElement(settingsMenu);
         }
+        removeClass(getSettingsButton(), "rotate");
     }, 0);
 })();