From 22f49b78251ff6760844fc391c5554e6a86e294f Mon Sep 17 00:00:00 2001
From: David Stansby <dstansby@gmail.com>
Date: Thu, 12 Apr 2018 09:53:32 +0100
Subject: [PATCH] Backport PR #11028: Add note concerning python2 support on
 doc start page

---
 doc/_static/mpl.css                      | 17 +++++++++++++----
 doc/_templates/sidebar_announcement.html |  5 +++++
 doc/conf.py                              |  3 ++-
 3 files changed, 20 insertions(+), 5 deletions(-)
 create mode 100644 doc/_templates/sidebar_announcement.html

diff --git a/doc/_static/mpl.css b/doc/_static/mpl.css
index 20c2b26b9660..e460fd569823 100644
--- a/doc/_static/mpl.css
+++ b/doc/_static/mpl.css
@@ -309,11 +309,11 @@ h2 {
     margin: 0.5em 0 0.2em 0;
     padding-top: 0.5em;
     font-size: 1.7em;
-    padding: 0;
 }
 
 h3 {
     margin: 0.2em 0 0.1em 0;
+    padding-top: 0.5em;
     font-size: 1.2em;
 }
 
@@ -846,14 +846,12 @@ figcaption {
 }
 
 #sidebar-donations {
-    margin-top: 28px;
+    margin-top: 40px;
 }
 
 .donate_button {
     background:#11557C;
     font-weight:normal;
-    border:solid 1px #fff;
-    outline: solid 1px #11557C;
     clear: both;
     display: block;
     width:200px;
@@ -864,6 +862,7 @@ figcaption {
     color:#fff;
     text-decoration: none;
     margin: 30px auto 0;
+    border-radius: 6px;
     z-index:1;
     transition: background .25s ease;
 }
@@ -972,3 +971,13 @@ p.sphx-glr-signature a.reference.external {
     font-weight: 400;
 }
 
+.sidebar-announcement {
+    border: 1px solid #11557C;
+    background: #eff9ff;
+    padding: 2px;
+    margin-top: 40px;
+}
+
+.sidebar-announcement p {
+    margin: 0.4em 0.4em 0.6em 0.4em;
+}
diff --git a/doc/_templates/sidebar_announcement.html b/doc/_templates/sidebar_announcement.html
new file mode 100644
index 000000000000..66de835a7a9e
--- /dev/null
+++ b/doc/_templates/sidebar_announcement.html
@@ -0,0 +1,5 @@
+<div class="sidebar-announcement">
+  <p>The upcoming version Matplotlib 3.0 will be Python 3 only.</p>
+  <p>For Python 2 support, Matplotlib 2.2.x will be continued as a LTS release
+      and updated with bugfixes until January 1, 2020.</p>
+</div>
diff --git a/doc/conf.py b/doc/conf.py
index 5dad15a26aa2..4d01737af70b 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -242,7 +242,8 @@ def _check_deps():
 
 # Custom sidebar templates, maps page names to templates.
 html_sidebars = {
-    'index': ['searchbox.html', 'donate_sidebar.html'],
+    'index': ['searchbox.html', 'sidebar_announcement.html',
+              'donate_sidebar.html'],
     '**': ['searchbox.html', 'localtoc.html', 'relations.html',
            'pagesource.html']
 }