From 58d01ff80569b54e23a94a16673375827ac404c9 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@git.wordpress.org>
Date: Mon, 14 Nov 2016 19:11:35 +0000
Subject: [PATCH] Customize: Maximize height of Custom CSS `textarea` without
 causing doubled scrollbars.

Textarea will fill vertical height of Custom CSS section for browsers that support `calc()` and when plugins don't add other controls to the section. Also run CSS autoprefixer.

Props michaelarestad, westonruter.
See #35395.
Fixes #38755.


git-svn-id: https://develop.svn.wordpress.org/trunk@39229 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/css/customize-controls.css   | 60 ++++++++++++++---------
 src/wp-includes/css/customize-preview.css |  3 ++
 2 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/src/wp-admin/css/customize-controls.css b/src/wp-admin/css/customize-controls.css
index b1b59151ee..8b38aee399 100644
--- a/src/wp-admin/css/customize-controls.css
+++ b/src/wp-admin/css/customize-controls.css
@@ -1135,40 +1135,54 @@ p.customize-section-description {
 /**
  * Custom CSS Section
  *
- * Modifications to the Section Container to
- * make the textarea full-width.
+ * Modifications to the Section Container to make the textarea full-width and
+ * full-height, if the control is the only control in the section.
  */
-#customize-theme-controls #sub-accordion-section-custom_css {
-	padding-left: 0;
-	padding-right: 0;
-}
 
-#customize-theme-controls #sub-accordion-section-custom_css .customize-section-title {
-	margin-left: 0;
-}
-
-#customize-theme-controls #sub-accordion-section-custom_css .customize-control-title,
-#customize-theme-controls #sub-accordion-section-custom_css .notice {
-	margin-left: 10px;
-	margin-right: 10px;
-}
-#customize-theme-controls #sub-accordion-section-custom_css textarea {
-	-moz-tab-size: 4;
-	-o-tab-size: 4;
-	tab-size: 4;
+#customize-controls .customize-section-description-container.section-meta.customize-info {
+	border-bottom: none;
 }
 
 #sub-accordion-section-custom_css .customize-control-notifications-container {
 	margin-bottom: 15px;
 }
 
-#sub-accordion-section-custom_css textarea {
-	border-right: 0;
-	border-left: 0;
+#customize-control-custom_css textarea {
+	display: block;
 	font-family: Consolas, Monaco, monospace;
 	font-size: 12px;
 	padding: 6px 8px;
-	height: 553px;
+	height: 500px;
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+}
+
+.customize-section-description-container + #customize-control-custom_css:last-child textarea {
+	border-right: 0;
+	border-left: 0;
+	height: -webkit-calc( 100vh - 185px );
+	height: calc( 100vh - 185px );
+	resize: none;
+}
+.customize-section-description-container + #customize-control-custom_css:last-child {
+	margin-left: -12px;
+	width: 299px;
+	margin-bottom: -12px;
+}
+
+@media screen and ( max-width: 640px ) {
+	.customize-section-description-container + #customize-control-custom_css:last-child {
+		margin-left: 0;
+		margin-right: 0;
+		width: 100%;
+	}
+	.customize-section-description-container + #customize-control-custom_css:last-child textarea {
+		height: -webkit-calc( 100vh - 140px );
+		height: calc( 100vh - 140px );
+		width: 100%;
+		border: solid 1px #ddd;
+	}
 }
 
 /**
diff --git a/src/wp-includes/css/customize-preview.css b/src/wp-includes/css/customize-preview.css
index 3d623def5e..114326d507 100644
--- a/src/wp-includes/css/customize-preview.css
+++ b/src/wp-includes/css/customize-preview.css
@@ -55,6 +55,8 @@
 	box-shadow: 0 2px 1px rgba(46,68,83,0.15);
 	text-align: center;
 	cursor: pointer;
+	-webkit-box-sizing: border-box;
+	-moz-box-sizing: border-box;
 	box-sizing: border-box;
 	padding: 3px;
 	-webkit-animation-fill-mode: both;
@@ -86,6 +88,7 @@
 }
 
 .customize-partial-edit-shortcut button:focus {
+	-webkit-box-shadow: 0 0 0 2px #008ec2;
 	box-shadow: 0 0 0 2px #008ec2;
 }