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<title>[41648] trunk: Customize: Introduce a new experience for discovering, installing, and previewing themes within the customizer.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/41648">41648</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/41648","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>westonruter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-09-29 20:12:19 +0000 (Fri, 29 Sep 2017)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Customize: Introduce a new experience for discovering, installing, and previewing themes within the customizer.

Unify the theme-browsing and theme-customization experiences by introducing a comprehensive theme browser and installer directly accessible in the customizer. Replaces the customizer theme switcher with a full-screen panel for discovering/browsing and installing themes available on WordPress.org. Themes can now be installed and previewed directly in the customizer without entering the wp-admin context. Also includes an extensible framework for browsing and installing themes from other sources.

Also includes CSS auto-prefixing added via `grunt precommit:css`.

For details, see: https://make.wordpress.org/core/2016/10/03/feature-proposal-a-new-experience-for-discovering-installing-and-previewing-themes-in-the-customizer/

Previously <a href="https://core.trac.wordpress.org/changeset/38813">[38813]</a> but reverted in <a href="https://core.trac.wordpress.org/changeset/39140">[39140]</a>.
Fixes <a href="https://core.trac.wordpress.org/ticket/37661">#37661</a>, <a href="https://core.trac.wordpress.org/ticket/34843">#34843</a>, <a href="https://core.trac.wordpress.org/ticket/38666">#38666</a>.
Props celloexpressions, folletto, westonruter, karmatosed, melchoyce, afercia.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadmincsscommoncss">trunk/src/wp-admin/css/common.css</a></li>
<li><a href="#trunksrcwpadmincsscustomizecontrolscss">trunk/src/wp-admin/css/customize-controls.css</a></li>
<li><a href="#trunksrcwpadmincssinstallcss">trunk/src/wp-admin/css/install.css</a></li>
<li><a href="#trunksrcwpadmincsslisttablescss">trunk/src/wp-admin/css/list-tables.css</a></li>
<li><a href="#trunksrcwpadmincssnavmenuscss">trunk/src/wp-admin/css/nav-menus.css</a></li>
<li><a href="#trunksrcwpadmincssthemescss">trunk/src/wp-admin/css/themes.css</a></li>
<li><a href="#trunksrcwpadmincustomizephp">trunk/src/wp-admin/customize.php</a></li>
<li><a href="#trunksrcwpadminincludesthemephp">trunk/src/wp-admin/includes/theme.php</a></li>
<li><a href="#trunksrcwpadminjscustomizecontrolsjs">trunk/src/wp-admin/js/customize-controls.js</a></li>
<li><a href="#trunksrcwpadminjsupdatesjs">trunk/src/wp-admin/js/updates.js</a></li>
<li><a href="#trunksrcwpincludesclasswpcustomizemanagerphp">trunk/src/wp-includes/class-wp-customize-manager.php</a></li>
<li><a href="#trunksrcwpincludescssadminbarcss">trunk/src/wp-includes/css/admin-bar.css</a></li>
<li><a href="#trunksrcwpincludescsswpembedtemplatecss">trunk/src/wp-includes/css/wp-embed-template.css</a></li>
<li><a href="#trunksrcwpincludescustomizeclasswpcustomizethemecontrolphp">trunk/src/wp-includes/customize/class-wp-customize-theme-control.php</a></li>
<li><a href="#trunksrcwpincludescustomizeclasswpcustomizethemessectionphp">trunk/src/wp-includes/customize/class-wp-customize-themes-section.php</a></li>
<li><a href="#trunktestsphpunittestscustomizemanagerphp">trunk/tests/phpunit/tests/customize/manager.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunksrcwpincludescustomizeclasswpcustomizethemespanelphp">trunk/src/wp-includes/customize/class-wp-customize-themes-panel.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpadmincsscommoncss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/common.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/common.css 2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/common.css   2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -123,6 +123,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> .ui-helper-hidden-accessible {
</span><span class="cx" style="display: block; padding: 0 10px">        border: 0;
</span><span class="cx" style="display: block; padding: 0 10px">        clip: rect(1px, 1px, 1px, 1px);
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        -webkit-clip-path: inset(50%);
</ins><span class="cx" style="display: block; padding: 0 10px">         clip-path: inset(50%);
</span><span class="cx" style="display: block; padding: 0 10px">        height: 1px;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: -1px;
</span></span></pre></div>
<a id="trunksrcwpadmincsscustomizecontrolscss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/customize-controls.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/customize-controls.css     2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/customize-controls.css       2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -589,20 +589,16 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.open,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-theme-controls .customize-pane-child.current-panel,
-#customize-theme-controls .customize-themes-panel.customize-pane-child.current-panel {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+#customize-theme-controls .customize-pane-child.current-panel {
</ins><span class="cx" style="display: block; padding: 0 10px">         -webkit-transform: none;
</span><span class="cx" style="display: block; padding: 0 10px">        transform: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-theme-controls .customize-themes-panel.customize-pane-child,
</del><span class="cx" style="display: block; padding: 0 10px"> .section-open #customize-theme-controls .customize-pane-parent,
</span><span class="cx" style="display: block; padding: 0 10px"> .in-sub-panel #customize-theme-controls .customize-pane-parent,
</span><span class="cx" style="display: block; padding: 0 10px"> .section-open #customize-info,
</span><span class="cx" style="display: block; padding: 0 10px"> .in-sub-panel #customize-info,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.in-sub-panel.section-open #customize-theme-controls .customize-pane-child.current-panel,
-.in-themes-panel #customize-theme-controls .customize-pane-parent,
-.in-themes-panel #customize-info {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.in-sub-panel.section-open #customize-theme-controls .customize-pane-child.current-panel {
</ins><span class="cx" style="display: block; padding: 0 10px">         visibility: hidden;
</span><span class="cx" style="display: block; padding: 0 10px">        height: 0;
</span><span class="cx" style="display: block; padding: 0 10px">        overflow: hidden;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -612,10 +608,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> .section-open #customize-theme-controls .customize-pane-parent.busy,
</span><span class="cx" style="display: block; padding: 0 10px"> .in-sub-panel #customize-theme-controls .customize-pane-parent.busy,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.in-themes-panel #customize-theme-controls .customize-pane-parent.busy,
</del><span class="cx" style="display: block; padding: 0 10px"> .section-open #customize-info.busy,
</span><span class="cx" style="display: block; padding: 0 10px"> .in-sub-panel #customize-info.busy,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.in-themes-panel #customize-info.busy,
</del><span class="cx" style="display: block; padding: 0 10px"> .busy.section-open.in-sub-panel #customize-theme-controls .customize-pane-child.current-panel,
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.open,
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.current-panel,
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -625,12 +619,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">        overflow: auto;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.in-themes-panel #customize-theme-controls .customize-pane-parent,
-.in-themes-panel #customize-info {
-       -webkit-transform: translateX(100%);
-       transform: translateX(100%);
-}
-
</del><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.accordion-section-content,
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .customize-pane-child.accordion-sub-container {
</span><span class="cx" style="display: block; padding: 0 10px">        display: block;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1572,38 +1560,46 @@
</span><span class="cx" style="display: block; padding: 0 10px">        100% { opacity: 1; }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/* #customize-container is reused from customize-loader.js, hence the naming. */
-.wp-customizer .customize-loading #customize-container {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.wp-customizer .customize-loading #customize-themes-loading-container {
</ins><span class="cx" style="display: block; padding: 0 10px">         display: block;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        -webkit-animation: customize-reload .75s; /* Can't use `transition` because `display` changes here. */
-       animation: customize-reload .75s;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ -webkit-animation: customize-reload .5s; /* Can't use `transition` because `display` changes here. */
+       animation: customize-reload .5s;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-theme-controls .control-section-themes .accordion-section-title:hover, /* Not a focusable element. */
-#customize-theme-controls .control-section-themes .accordion-section-title {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.customize-loading #customize-themes-loading-container span {
+       clear: both;
+       color: #191e23;
+       font-size: 18px;
+       font-style: normal;
+       margin: 0;
+       padding: 2em 0;
+       text-align: center;
+       width: 100%;
+       display: block;
+       top: 50%;
+       position: relative;
+}
+
+.customize-loading #customize-themes-loading-container .customize-loading-text {
+       display: none;
+}
+
+#customize-theme-controls .control-panel-themes {
+       border-bottom: none;
+}
+
+#customize-theme-controls .control-panel-themes > .accordion-section-title:hover, /* Not a focusable element. */
+#customize-theme-controls .control-panel-themes > .accordion-section-title {
</ins><span class="cx" style="display: block; padding: 0 10px">         cursor: default;
</span><span class="cx" style="display: block; padding: 0 10px">        background: #fff;
</span><span class="cx" style="display: block; padding: 0 10px">        color: #555d66;
</span><span class="cx" style="display: block; padding: 0 10px">        border-top: 1px solid #ddd;
</span><span class="cx" style="display: block; padding: 0 10px">        border-bottom: 1px solid #ddd;
</span><span class="cx" style="display: block; padding: 0 10px">        border-left: none;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        margin-top: 0;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ border-right: none;
+       margin: 0 0 15px 0;
+       padding-right: 100px; /* Space for the button */
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-theme-controls .control-section-themes .customize-section-back {
-       position: absolute;
-       right: 0;
-       top: 0;
-       height: 80px;
-       border-left: 1px solid #ddd;
-       border-right: 4px solid #fff;
-}
-#customize-theme-controls .control-section-themes .customize-section-back:before {
-       content: "\f345";
-}
-#customize-theme-controls .control-section-themes .customize-section-back:hover,
-#customize-theme-controls .control-section-themes .customize-section-back:focus {
-       border-right-color: #0073aa;
-}
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .control-section-themes .customize-themes-panel .accordion-section-title:first-child:hover, /* Not a focusable element. */
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .control-section-themes .customize-themes-panel .accordion-section-title:first-child {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1625,6 +1621,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">        padding-right: 100px; /* Space for the button */
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .accordion-section-title span.customize-action,
+#customize-controls .customize-section-title span.customize-action,
</ins><span class="cx" style="display: block; padding: 0 10px"> #customize-controls .control-section-themes .accordion-section-title span.customize-action,
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-controls .customize-section-title span.customize-action,
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-outer-theme-controls .customize-section-title span.customize-action {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1633,8 +1631,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        font-weight: 400;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .control-section-themes .accordion-section-title .change-theme,
-#customize-controls .customize-themes-panel .accordion-section-title .customize-theme {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+#customize-theme-controls .control-panel-themes .accordion-section-title .change-theme {
</ins><span class="cx" style="display: block; padding: 0 10px">         position: absolute;
</span><span class="cx" style="display: block; padding: 0 10px">        right: 10px;
</span><span class="cx" style="display: block; padding: 0 10px">        top: 50%;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1642,38 +1639,255 @@
</span><span class="cx" style="display: block; padding: 0 10px">        font-weight: 400;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .control-section-themes .accordion-section-title:before {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+#customize-theme-controls .control-panel-themes > .accordion-section-title:after {
</ins><span class="cx" style="display: block; padding: 0 10px">         display: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .customize-themes-panel {
-       padding: 0 8px;
-       background: #f1f1f1;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .customize-themes-full-container {
+       position: fixed;
+       top: 0;
+       left: 0;
+       transition: .18s left ease-in-out;
+       margin: 46px 0 0 300px;
+       padding: 25px 0;
+       overflow-y: scroll;
+       width: calc(100% - 300px);
+       height: calc(100% - 96px);
+       background: #eee;
+       z-index: 20;
+}
+
+/* Animations for opening the themes panel */
+#customize-header-actions .save,
+#customize-header-actions .spinner,
+#customize-header-actions .customize-controls-preview-toggle {
+       position: relative;
+       top: 0;
+       transition: .18s top ease-in-out;
+}
+
+#customize-footer-actions,
+#customize-footer-actions .collapse-sidebar {
+       bottom: 0;
+       transition: .18s bottom ease-in-out;
+}
+
+.in-themes-panel:not(.animating) #customize-header-actions .save,
+.in-themes-panel:not(.animating) #customize-header-actions #publish-settings,
+.in-themes-panel:not(.animating) #customize-header-actions .spinner,
+.in-themes-panel:not(.animating) #customize-header-actions .customize-controls-preview-toggle,
+.in-themes-panel:not(.animating) #customize-preview,
+.in-themes-panel:not(.animating) #customize-footer-actions {
+       visibility: hidden;
+}
+
+.wp-full-overlay.in-themes-panel {
+       background: #eee; /* Prevents a black flash when fading in the panel */
+}
+
+.in-themes-panel #customize-header-actions .save,
+.in-themes-panel #customize-header-actions .spinner,
+.in-themes-panel #customize-header-actions .customize-controls-preview-toggle {
+       top: -45px;
+}
+
+.in-themes-panel #customize-footer-actions,
+.in-themes-panel #customize-footer-actions .collapse-sidebar {
+       bottom: -45px;
+}
+
+/* Don't show the theme count while the panel opens, as it's in the wrong place during the animation */
+.in-themes-panel.animating .control-panel-themes .filter-themes-count {
+       display: none;
+}
+
+.in-themes-panel.wp-full-overlay .wp-full-overlay-sidebar-content {
+       bottom: 0;
+}
+
+.themes-filter-bar .feature-filter-toggle {
+       float: right;
+       margin: 3px 0 3px 25px;
+}
+
+.themes-filter-bar .feature-filter-toggle:before {
+    content: "\f111";
+    margin: 0 5px 0 0;
+    font: normal 16px/1 dashicons;
+    vertical-align: text-bottom;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+}
+
+.themes-filter-bar .feature-filter-toggle.open {
+       background: #eee;
+       border-color: #999;
+       box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
+       -webkit-transform: translateY(1px);
+       transform: translateY(1px);
+}
+
+.themes-filter-bar .feature-filter-toggle .filter-count-filters {
+       display: none;
+}
+
+.themes-filter-bar .filter-drawer {
</ins><span class="cx" style="display: block; padding: 0 10px">         box-sizing: border-box;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        width: 100%;
+       position: absolute;
+       top: 46px;
+       left: 0;
+       padding: 25px 0 25px 25px;
+       border-top: 0;
+       margin: 0;
+       background: #eee;
+       border-bottom: 1px solid #ddd;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .customize-themes-panel .accordion-section-title:first-child {
-       margin-top: 0;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.themes-filter-bar .filter-group {
+       margin: 0 25px 0 0;
+       width: calc( (100% - 75px) / 3);
+       min-width: 200px;
+       max-width: 320px;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .customize-themes-panel .accordion-section-title:nth-child(2) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/* Adds a delay before fading in to avoid it "jumping" */
+@-webkit-keyframes themes-fade-in {
+       0% {
+               opacity: 0;
+       }
+       50% {
+               opacity: 0;
+       }
+       100% {
+               opacity: 1;
+       }
+}
+@keyframes themes-fade-in {
+       0% {
+               opacity: 0;
+       }
+       50% {
+               opacity: 0;
+       }
+       100% {
+               opacity: 1;
+       }
+}
+
+.control-panel-themes .customize-themes-full-container.animate {
+       -webkit-animation: .6s themes-fade-in 1;
+       animation: .6s themes-fade-in 1;
+}
+
+.in-themes-panel:not(.animating) .control-panel-themes .filter-themes-count {
+       -webkit-animation: .6s themes-fade-in 1;
+       animation: .6s themes-fade-in 1;
+}
+
+.control-panel-themes .filter-themes-count {
+       position: relative;
+       float: right;
+       line-height: 34px;
+}
+
+.control-panel-themes .filter-themes-count .themes-displayed {
+       font-weight: 600;
+       color: #555d66;
+}
+
+.customize-themes-notifications {
+       margin: 0;
+}
+
+.control-panel-themes .customize-themes-notifications .notice {
+       margin: 0 0 25px 0;
+}
+
+.customize-themes-full-container .customize-themes-section {
+       display: none !important; /* There is unknown JS that perpetually tries to show all theme sections when more items are added. */
+       overflow: hidden;
+}
+
+.customize-themes-full-container .customize-themes-section.current-section {
+       display: list-item !important; /* There is unknown JS that perpetually tries to show all theme sections when more items are added. */
+}
+
+.control-section .customize-section-text-before {
+       padding: 0 0 8px 15px;
+       margin: 15px 0 0 0;
+       line-height: 16px;
+       border-bottom: 1px solid #ddd;
+       color: #555d66;
+}
+
+.control-panel-themes .customize-themes-section-title {
+       width: 100%;
+       background: #fff;
+       box-shadow: none;
+       outline: none;
+       border-top: none;
+       border-bottom: 1px solid #ddd;
+       border-left: 4px solid #fff;
+       border-right: none;
+       cursor: pointer;
+       padding: 10px 15px;
+       position: relative;
+       text-align: left;
</ins><span class="cx" style="display: block; padding: 0 10px">         font-size: 14px;
</span><span class="cx" style="display: block; padding: 0 10px">        font-weight: 600;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        color: #555d66;
+       text-shadow: none;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-controls .customize-themes-panel > h2 {
-       padding: 15px 8px 0 8px;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes #accordion-section-installed_themes {
+       border-top: 1px solid #ddd;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-theme-controls .customize-themes-panel .accordion-section-content {
-       background: transparent;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .theme-section {
+       margin: 0;
+       position: relative;
+}
+
+.control-panel-themes .customize-themes-section-title:focus,
+.control-panel-themes .customize-themes-section-title:hover {
+       border-left-color: #0073aa;
+       color: #0073aa;
+       background: #f5f5f5;
+}
+
+.customize-themes-section-title:not(.selected):after {
+       content: "";
</ins><span class="cx" style="display: block; padding: 0 10px">         display: block;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        position: absolute;
+       top: 9px;
+       right: 15px;
+       width: 18px;
+       height: 18px;
+       border-radius: 100%;
+       border: 1px solid #ccc;
+       background: #fff;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.customize-control.customize-control-theme {
-       margin-bottom: 8px;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .theme-section .customize-themes-section-title.selected:after {
+       content: "\f147";
+       font: 16px/1 dashicons;
+       box-sizing: border-box;
+       width: 20px;
+       height: 20px;
+       padding: 3px 3px 1px 1px; /* Re-align the icon to the smaller grid */
+       border-radius: 100%;
+       position: absolute;
+       top: 9px;
+       right: 15px;
+       background: #0073aa;
+       color: #fff;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .customize-themes-section-title.selected {
+       color: #0073aa;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> #customize-theme-controls .themes.accordion-section-content {
</span><span class="cx" style="display: block; padding: 0 10px">        position: relative;
</span><span class="cx" style="display: block; padding: 0 10px">        left: 0;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1681,17 +1895,94 @@
</span><span class="cx" style="display: block; padding: 0 10px">        width: 100%;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.wp-customizer .theme-browser .themes {
-       padding-bottom: 8px;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.loading .customize-themes-section .spinner {
+       display: block;
+       visibility: visible;
+       position: relative;
+       clear: both;
+       width: 20px;
+       height: 20px;
+       left: calc(50% - 10px);
+       float: none;
+       margin-top: 50px;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.wp-customizer .theme-browser .theme {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.customize-themes-section .no-themes,
+.customize-themes-section .no-themes-local {
+       display: none;
+}
+
+.themes-section-installed_themes .theme .notice-success {
+       display: none; /* Hide "installed" notice on installed themes tab. */
+}
+
+.control-panel-themes .theme-browser .theme .theme-actions .button-primary {
+       margin: 0 0 0 8px;
+}
+
+.customize-control-theme .theme {
+       width: 100%;
</ins><span class="cx" style="display: block; padding: 0 10px">         margin: 0;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        width: 100%;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ border: 1px solid #ddd;
+       background: #fff;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.customize-control-theme .theme .theme-name, .customize-control-theme .theme .theme-actions {
+       background: #fff;
+       border: none;
+}
+
+.customize-control.customize-control-theme { /* override most properties on .customize-control */
+       box-sizing: border-box;
+       width: 25%;
+       max-width: 600px; /* Max. screenshot size / 2 */
+       margin: 0 25px 25px 0;
+       padding: 0;
+       clear: none;
+}
+
+/* 5 columns above 2100px */
+@media screen and (min-width: 2101px) {
+       .customize-control.customize-control-theme {
+               width: calc( ( 100% - 125px ) / 5 - 1px ); /* 1px offset accounts for browser rounding, typical all grids */
+       }
+}
+
+/* 4 columns up to 2100px */
+@media screen and (min-width: 1601px) and (max-width: 2100px) {
+       .customize-control.customize-control-theme {
+               width: calc( ( 100% - 100px ) / 4 - 1px );
+       }
+}
+
+/* 3 columns up to 1600px */
+@media screen and (min-width: 1201px) and (max-width: 1600px) {
+       .customize-control.customize-control-theme {
+               width: calc( ( 100% - 75px ) / 3 - 1px );
+       }
+}
+
+/* 2 columns up to 1200px */
+@media screen and (min-width: 851px) and (max-width: 1200px) {
+       .customize-control.customize-control-theme {
+               width: calc( ( 100% - 50px ) / 2 - 1px );
+
+       }
+}
+
+/* 1 column up to 850 px */
+@media screen and (max-width: 850px) {
+       .customize-control.customize-control-theme {
+               width: 100%;
+       }
+}
+
+.wp-customizer .theme-browser .themes {
+       padding: 0 0 25px 25px;
+       transition: .18s margin-top linear;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .wp-customizer .theme-browser .theme .theme-actions {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
</del><span class="cx" style="display: block; padding: 0 10px">         opacity: 1;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1703,20 +1994,161 @@
</span><span class="cx" style="display: block; padding: 0 10px">        font-size: 32px;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.wp-customizer #themes-filter {
-       font-size: 16px;
-       font-weight: 300;
-       line-height: 1.5;
-       width: 100%;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.customize-preview-header.themes-filter-bar {
+       position: fixed;
+       top: 0;
+       left: 300px;
+       width: calc(100% - 300px);
+       height: 46px;
+       background: #eee;
+       z-index: 10;
+       padding: 6px 25px;
+       box-sizing: border-box;
+       border-bottom: 1px solid #ddd;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.control-section-themes .accordion-section-title:after,
-.customize-themes-panel .accordion-section-title:after {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.themes-filter-bar .themes-filter-container {
+       margin: 0;
+       padding: 0;
+}
+
+.themes-filter-bar .wp-filter-search {
+       line-height: 25px;
+       padding: 3px 5px;
+       max-width: 100%;
+       width: 40%;
+       min-width: 300px;
+       position: absolute;
+       top: 6px;
+       left: 25px;
+}
+
+/* Unstick the filter bar on short windows/screens. This breakpoint is based on the
+   current length of .org feature filters assuming translations do not wrap lines. */
+@media screen and (max-height:540px), screen and (max-width:1018px) {
+       .customize-preview-header.themes-filter-bar {
+               position: relative;
+               left: 0;
+               width: 100%;
+               margin: 0 0 25px 0;
+       }
+       .wp-customizer .theme-browser .themes {
+               padding: 0 0 25px 25px;
+               overflow: hidden;
+       }
+
+       .control-panel-themes .customize-themes-full-container {
+               margin-top: 0;
+               padding: 0;
+               height: 100%;
+               width: calc(100% - 300px);
+       }
+}
+
+@media screen and (max-width:1018px) {
+       .themes-filter-bar .filter-group {
+               width: calc( (100% - 50px) / 2);
+       }
+}
+
+@media screen and (max-width:900px) {
+       .customize-preview-header.themes-filter-bar {
+               height: 86px;
+               padding-top: 46px;
+       }
+
+       .themes-filter-bar .wp-filter-search {
+               width: calc(100% - 50px);
+               margin: 0;
+               min-width: 200px;
+       }
+
+       .themes-filter-bar .filter-drawer {
+               top: 86px;
+       }
+
+       .control-panel-themes .filter-themes-count {
+               float: left;
+       }
+}
+
+@media screen and (max-width:792px) {
+       .themes-filter-bar .filter-group {
+               width: calc( 100% - 25px);
+       }
+}
+
+.control-panel-themes .customize-themes-mobile-back {
</ins><span class="cx" style="display: block; padding: 0 10px">         display: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.customize-themes-panel.control-panel-content {
-       border-top: 1px solid #ddd;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/* Mobile - toggle between themes and filters */
+@media screen and (max-width:600px) {
+
+       .wp-full-overlay.showing-themes .control-panel-themes .filter-themes-count .filter-themes {
+               display: block;
+               float: right;
+       }
+
+       .control-panel-themes .customize-themes-full-container {
+               width: 100%;
+               margin: 0;
+               top: 46px;
+               height: calc(100% - 46px);
+               z-index: 1;
+               display: none;
+       }
+
+       .showing-themes .control-panel-themes .customize-themes-full-container {
+               display: block;
+       }
+
+       .wp-customizer .showing-themes .control-panel-themes .customize-themes-mobile-back {
+               display: block;
+               position: fixed;
+               top: 0;
+               left: 0;
+               background: #eee;
+               color: #444;
+               border-radius: 0;
+               box-shadow: none;
+               border: none;
+               height: 46px;
+               width: 100%;
+               z-index: 10;
+               text-align: left;
+               text-shadow: none;
+               border-bottom: 1px solid #ddd;
+               border-left: 4px solid transparent;
+               margin: 0;
+               padding: 0;
+               font-size: 0;
+               overflow: hidden;
+       }
+
+       .wp-customizer .showing-themes .control-panel-themes .customize-themes-mobile-back:before {
+               left: 0;
+               top: 0;
+               height: 42px;
+               width: 26px;
+               display: block;
+               line-height: 46px;
+               padding: 0 8px 0 8px;
+               border-right: 1px solid #ddd;
+       }
+
+       .wp-customizer .showing-themes .control-panel-themes .customize-themes-mobile-back:hover,
+       .wp-customizer .showing-themes .control-panel-themes .customize-themes-mobile-back:focus {
+               color: #0073aa;
+               background: #f3f3f5;
+               border-left-color: #0073aa;
+               outline: none;
+               box-shadow: none;
+       }
+
+       .showing-themes #customize-header-actions {
+               display: none;
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /* Details View */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1733,31 +2165,92 @@
</span><span class="cx" style="display: block; padding: 0 10px">        z-index: 109;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/* Avoid a z-index war by resetting elements that should be under the overlay.
+   This is likely required because of the way that sections and panels are positioned. */
+.wp-customizer.modal-open #customize-header-actions,
+.wp-customizer.modal-open .control-panel-themes .filter-themes-count,
+.wp-customizer.modal-open .control-panel-themes .customize-themes-section-title.selected:after {
+       z-index: -1;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .wp-customizer .theme-overlay .theme-backdrop {
</span><span class="cx" style="display: block; padding: 0 10px">        background: rgba( 238, 238, 238, 0.75 );
</span><span class="cx" style="display: block; padding: 0 10px">        position: fixed;
</span><span class="cx" style="display: block; padding: 0 10px">        z-index: 110;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.wp-customizer .theme-overlay .star-rating {
+       float: left;
+       margin-right: 8px;
+}
+
+.wp-customizer .theme-rating .num-ratings {
+       line-height: 20px;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> .wp-customizer .theme-overlay .theme-wrap {
</span><span class="cx" style="display: block; padding: 0 10px">        left: 90px;
</span><span class="cx" style="display: block; padding: 0 10px">        right: 90px;
</span><span class="cx" style="display: block; padding: 0 10px">        top: 45px;
</span><span class="cx" style="display: block; padding: 0 10px">        bottom: 45px;
</span><span class="cx" style="display: block; padding: 0 10px">        z-index: 120;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        max-width: 1740px; /* To ensure that theme screenshots are not displayed larger than 880px wide. */
</del><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> .wp-customizer .theme-overlay .theme-actions {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        text-align: right; /* Because there's only one action, match the pattern of media modals and right-align the action. */
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ text-align: right; /* Because there're only one or two actions, match the UI pattern of media modals and right-align the action. */
+       padding: 10px 25px;
+       background: #eee;
+       border-top: 1px solid #ddd;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-.ie8 .wp-customizer .theme-overlay .theme-header,
-.ie8 .wp-customizer .theme-overlay .theme-about,
-.ie8 .wp-customizer .theme-overlay .theme-actions {
-       position: static;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.wp-customizer .theme-overlay .theme-actions .theme-install.preview {
+       margin-left: 8px;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.control-panel-themes .theme-actions .delete-theme {
+       left: 15px; /* these override themes.css on mobile */
+       right: auto;
+       bottom: auto;
+       position: absolute;
+}
+
+.modal-open .in-themes-panel #customize-controls .wp-full-overlay-sidebar-content {
+       overflow: visible; /* Prevent the top-level Customizer controls from becoming visible when elements on the right of the details modal are focused. */
+}
+
+.wp-customizer .theme-header {
+       background: #eee;
+}
+
+.wp-customizer .theme-overlay .theme-header button,
+.wp-customizer .theme-overlay .theme-header .close:before {
+       color: #444;
+}
+
+.wp-customizer .theme-overlay .theme-header .close:focus,
+.wp-customizer .theme-overlay .theme-header .close:hover,
+.wp-customizer .theme-overlay .theme-header .right:focus,
+.wp-customizer .theme-overlay .theme-header .right:hover,
+.wp-customizer .theme-overlay .theme-header .left:focus,
+.wp-customizer .theme-overlay .theme-header .left:hover {
+       background: #fff;
+       border-bottom: 4px solid #0073aa;
+       color: #0073aa;
+}
+
+.wp-customizer .theme-overlay .theme-header .close:focus:before,
+.wp-customizer .theme-overlay .theme-header .close:hover:before {
+       color: #0073aa;
+}
+
+.wp-customizer .theme-overlay .theme-header button.disabled,
+.wp-customizer .theme-overlay .theme-header button.disabled:hover,
+.wp-customizer .theme-overlay .theme-header button.disabled:focus {
+       border-bottom: none;
+       background: transparent;
+       color: #ccc;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /* Small Screens */
</span><span class="cx" style="display: block; padding: 0 10px"> @media (max-width:850px), (max-height:472px) {
</span><span class="cx" style="display: block; padding: 0 10px">        .wp-customizer .theme-overlay .theme-wrap {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1783,7 +2276,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> body.cheatin h1 {
</span><span class="cx" style="display: block; padding: 0 10px">        border-bottom: 1px solid #ddd;
</span><span class="cx" style="display: block; padding: 0 10px">        clear: both;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        color: #666;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ color: #555d66;
</ins><span class="cx" style="display: block; padding: 0 10px">         font-size: 24px;
</span><span class="cx" style="display: block; padding: 0 10px">        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: 30px 0 0 0;
</span></span></pre></div>
<a id="trunksrcwpadmincssinstallcss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/install.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/install.css        2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/install.css  2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -404,6 +404,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> .screen-reader-text {
</span><span class="cx" style="display: block; padding: 0 10px">        border: 0;
</span><span class="cx" style="display: block; padding: 0 10px">        clip: rect(1px, 1px, 1px, 1px);
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        -webkit-clip-path: inset(50%);
</ins><span class="cx" style="display: block; padding: 0 10px">         clip-path: inset(50%);
</span><span class="cx" style="display: block; padding: 0 10px">        height: 1px;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: -1px;
</span></span></pre></div>
<a id="trunksrcwpadmincsslisttablescss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/list-tables.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/list-tables.css    2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/list-tables.css      2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1821,6 +1821,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        /* Show comment bubble as text instead */
</span><span class="cx" style="display: block; padding: 0 10px">        .post-com-count .screen-reader-text {
</span><span class="cx" style="display: block; padding: 0 10px">                position: static;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                -webkit-clip-path: none;
</ins><span class="cx" style="display: block; padding: 0 10px">                 clip-path: none;
</span><span class="cx" style="display: block; padding: 0 10px">                width: auto;
</span><span class="cx" style="display: block; padding: 0 10px">                height: auto;
</span></span></pre></div>
<a id="trunksrcwpadmincssnavmenuscss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/nav-menus.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/nav-menus.css      2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/nav-menus.css        2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -599,6 +599,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> .no-js.nav-menus-php .item-edit .screen-reader-text {
</span><span class="cx" style="display: block; padding: 0 10px">        position: static;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        -webkit-clip-path: none;
</ins><span class="cx" style="display: block; padding: 0 10px">         clip-path: none;
</span><span class="cx" style="display: block; padding: 0 10px">        width: auto;
</span><span class="cx" style="display: block; padding: 0 10px">        height: auto;
</span></span></pre></div>
<a id="trunksrcwpadmincssthemescss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/css/themes.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/css/themes.css 2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/css/themes.css   2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -549,7 +549,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        float: left;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: 0 30px 0 0;
</span><span class="cx" style="display: block; padding: 0 10px">        width: 55%;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        max-width: 880px;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ max-width: 1200px; /* Recommended theme screenshot width, set here to avoid stretching */
</ins><span class="cx" style="display: block; padding: 0 10px">         text-align: center;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1049,7 +1049,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">        text-align: center;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-p.no-themes {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+p.no-themes,
+p.no-themes-local {
</ins><span class="cx" style="display: block; padding: 0 10px">         clear: both;
</span><span class="cx" style="display: block; padding: 0 10px">        color: #666;
</span><span class="cx" style="display: block; padding: 0 10px">        font-size: 18px;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1705,9 +1706,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">        display: none;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-#customize-container {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+#customize-container,
+#customize-themes-loading-container {
</ins><span class="cx" style="display: block; padding: 0 10px">         display: none;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        background: #fff;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ background: #eee;
</ins><span class="cx" style="display: block; padding: 0 10px">         z-index: 500000;
</span><span class="cx" style="display: block; padding: 0 10px">        position: fixed;
</span><span class="cx" style="display: block; padding: 0 10px">        overflow: visible;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1720,6 +1722,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /* Make the Customizer and Theme installer overlays the only available content. */
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-container,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+#customize-themes-loading-container,
</ins><span class="cx" style="display: block; padding: 0 10px"> .theme-install-overlay {
</span><span class="cx" style="display: block; padding: 0 10px">        visibility: visible;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1824,6 +1827,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> #customize-preview.wp-full-overlay-main:before,
</span><span class="cx" style="display: block; padding: 0 10px"> .customize-loading #customize-container:before,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+.customize-loading #customize-themes-loading-container:before,
</ins><span class="cx" style="display: block; padding: 0 10px"> .theme-install-overlay .wp-full-overlay-main:before {
</span><span class="cx" style="display: block; padding: 0 10px">        content: "";
</span><span class="cx" style="display: block; padding: 0 10px">        display: block;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1861,6 +1865,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        #customize-preview.wp-full-overlay-main:before,
</span><span class="cx" style="display: block; padding: 0 10px">        .customize-loading #customize-container:before,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        .customize-loading #customize-themes-loading-container:before,
</ins><span class="cx" style="display: block; padding: 0 10px">         .theme-install-overlay .wp-full-overlay-main:before {
</span><span class="cx" style="display: block; padding: 0 10px">                background-image: url(../images/spinner-2x.gif);
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span></span></pre></div>
<a id="trunksrcwpadmincustomizephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/customize.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/customize.php  2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/customize.php    2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -125,7 +125,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ?><title><?php echo $admin_title; ?></title>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> <script type="text/javascript">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-var ajaxurl = <?php echo wp_json_encode( admin_url( 'admin-ajax.php', 'relative' ) ); ?>;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+var ajaxurl = <?php echo wp_json_encode( admin_url( 'admin-ajax.php', 'relative' ) ); ?>,
+       pagenow = 'customize';
</ins><span class="cx" style="display: block; padding: 0 10px"> </script>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span></span></pre></div>
<a id="trunksrcwpadminincludesthemephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/theme.php     2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/includes/theme.php       2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -234,51 +234,44 @@
</span><span class="cx" style="display: block; padding: 0 10px">        // Hard-coded list is used if api not accessible.
</span><span class="cx" style="display: block; padding: 0 10px">        $features = array(
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                __( 'Layout' ) => array(
-                       'grid-layout'   => __( 'Grid Layout' ),
-                       'one-column'    => __( 'One Column' ),
-                       'two-columns'   => __( 'Two Columns' ),
-                       'three-columns' => __( 'Three Columns' ),
-                       'four-columns'  => __( 'Four Columns' ),
-                       'left-sidebar'  => __( 'Left Sidebar' ),
-                       'right-sidebar' => __( 'Right Sidebar' ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         __( 'Subject' )  => array(
+                       'blog'           => __( 'Blog' ),
+                       'e-commerce'     => __( 'E-Commerce' ),
+                       'education'      => __( 'Education' ),
+                       'entertainment'  => __( 'Entertainment' ),
+                       'food-and-drink' => __( 'Food & Drink' ),
+                       'holiday'        => __( 'Holiday' ),
+                       'news'           => __( 'News' ),
+                       'photography'    => __( 'Photography' ),
+                       'portfolio'      => __( 'Portfolio' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                __( 'Features' ) => array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'accessibility-ready'   => __( 'Accessibility Ready' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'buddypress'            => __( 'BuddyPress' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'custom-background'     => __( 'Custom Background' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'custom-colors'         => __( 'Custom Colors' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'custom-header'         => __( 'Custom Header' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'custom-logo'           => __( 'Custom Logo' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'custom-menu'           => __( 'Custom Menu' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'editor-style'          => __( 'Editor Style' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'featured-image-header' => __( 'Featured Image Header' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'featured-images'       => __( 'Featured Images' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'flexible-header'       => __( 'Flexible Header' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'footer-widgets'        => __( 'Footer Widgets' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'front-page-post-form'  => __( 'Front Page Posting' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'full-width-template'   => __( 'Full Width Template' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'microformats'          => __( 'Microformats' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'post-formats'          => __( 'Post Formats' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'rtl-language-support'  => __( 'RTL Language Support' ),
</del><span class="cx" style="display: block; padding: 0 10px">                         'sticky-post'           => __( 'Sticky Post' ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'theme-options'         => __( 'Theme Options' ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'threaded-comments'     => __( 'Threaded Comments' ),
-                       'translation-ready'     => __( 'Translation Ready' ),
</del><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                __( 'Subject' )  => array(
-                       'blog'           => __( 'Blog' ),
-                       'e-commerce'     => __( 'E-Commerce' ),
-                       'education'      => __( 'Education' ),
-                       'entertainment'  => __( 'Entertainment' ),
-                       'food-and-drink' => __( 'Food & Drink' ),
-                       'holiday'        => __( 'Holiday' ),
-                       'news'           => __( 'News' ),
-                       'photography'    => __( 'Photography' ),
-                       'portfolio'      => __( 'Portfolio' ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         __( 'Layout' ) => array(
+                       'grid-layout'   => __( 'Grid Layout' ),
+                       'one-column'    => __( 'One Column' ),
+                       'two-columns'   => __( 'Two Columns' ),
+                       'three-columns' => __( 'Three Columns' ),
+                       'four-columns'  => __( 'Four Columns' ),
+                       'left-sidebar'  => __( 'Left Sidebar' ),
+                       'right-sidebar' => __( 'Right Sidebar' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 )
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">         );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        if ( ! $api || ! current_user_can( 'install_themes' ) )
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -574,8 +567,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $parent = false;
</span><span class="cx" style="display: block; padding: 0 10px">                if ( $theme->parent() ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $parent = $theme->parent()->display( 'Name' );
-                       $parents[ $slug ] = $theme->parent()->get_stylesheet();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $parent = $theme->parent();
+                       $parents[ $slug ] = $parent->get_stylesheet();
+                       $parent = $parent->display( 'Name' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $customize_action = null;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -635,8 +629,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function customize_themes_print_templates() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $preview_url = esc_url( add_query_arg( 'theme', '__THEME__' ) ); // Token because esc_url() strips curly braces.
-       $preview_url = str_replace( '__THEME__', '{{ data.id }}', $preview_url );
</del><span class="cx" style="display: block; padding: 0 10px">         ?>
</span><span class="cx" style="display: block; padding: 0 10px">        <script type="text/html" id="tmpl-customize-themes-details-view">
</span><span class="cx" style="display: block; padding: 0 10px">                <div class="theme-backdrop"></div>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -648,7 +640,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        </div>
</span><span class="cx" style="display: block; padding: 0 10px">                        <div class="theme-about wp-clearfix">
</span><span class="cx" style="display: block; padding: 0 10px">                                <div class="theme-screenshots">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                <# if ( data.screenshot[0] ) { #>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         <# if ( data.screenshot && data.screenshot[0] ) { #>
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <div class="screenshot"><img src="{{ data.screenshot[0] }}" alt="" /></div>
</span><span class="cx" style="display: block; padding: 0 10px">                                <# } else { #>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <div class="screenshot blank"></div>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -661,29 +653,53 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        <# } #>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <h2 class="theme-name">{{{ data.name }}}<span class="theme-version"><?php printf( __( 'Version: %s' ), '{{ data.version }}' ); ?></span></h2>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <h3 class="theme-author"><?php printf( __( 'By %s' ), '{{{ data.authorAndUri }}}' ); ?></h3>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <p class="theme-description">{{{ data.description }}}</p>
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                        <# if ( data.stars && 0 != data.num_ratings ) { #>
+                                               <div class="theme-rating">
+                                                       {{{ data.stars }}}
+                                                       <span class="num-ratings">
+                                                               <?php
+                                                               /* translators: %s is the number of ratings */
+                                                               echo sprintf( __( '(%s ratings)' ), '{{ data.num_ratings }}' );
+                                                               ?>
+                                                       </span>
+                                               </div>
+                                       <# } #>
+
+                                       <# if ( data.hasUpdate ) { #>
+                                               <div class="notice notice-warning notice-alt notice-large" data-slug="{{ data.id }}">
+                                                       <h3 class="notice-title"><?php _e( 'Update Available' ); ?></h3>
+                                                       {{{ data.update }}}
+                                               </div>
+                                       <# } #>
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <# if ( data.parent ) { #>
</span><span class="cx" style="display: block; padding: 0 10px">                                                <p class="parent-theme"><?php printf( __( 'This is a child theme of %s.' ), '<strong>{{{ data.parent }}}</strong>' ); ?></p>
</span><span class="cx" style="display: block; padding: 0 10px">                                        <# } #>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                        <p class="theme-description">{{{ data.description }}}</p>
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <# if ( data.tags ) { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                <p class="theme-tags"><span><?php _e( 'Tags:' ); ?></span> {{ data.tags }}</p>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         <p class="theme-tags"><span><?php _e( 'Tags:' ); ?></span> {{{ data.tags }}}</p>
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <# } #>
</span><span class="cx" style="display: block; padding: 0 10px">                                </div>
</span><span class="cx" style="display: block; padding: 0 10px">                        </div>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <# if ( ! data.active ) { #>
-                               <div class="theme-actions">
-                                       <div class="inactive-theme">
-                                               <?php
-                                               /* translators: %s: Theme name */
-                                               $aria_label = sprintf( __( 'Preview %s' ), '{{ data.name }}' );
-                                               ?>
-                                               <a href="<?php echo $preview_url; ?>" target="_top" class="button button-primary" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Live Preview' ); ?></a>
-                                       </div>
-                               </div>
-                       <# } #>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <div class="theme-actions">
+                               <# if ( data.active ) { #>
+                                       <button type="button" class="button button-primary customize-theme"><?php _e( 'Customize' ); ?></a>
+                               <# } else if ( 'installed' === data.type ) { #>
+                                       <?php if ( current_user_can( 'delete_themes' ) ) { ?>
+                                               <# if ( data.actions && data.actions['delete'] ) { #>
+                                                       <a href="{{{ data.actions['delete'] }}}" data-slug="{{ data.id }}" class="button button-secondary delete-theme"><?php _e( 'Delete' ); ?></a>
+                                               <# } #>
+                                       <?php } ?>
+                                       <button type="button" class="button button-primary preview-theme" data-slug="{{ data.id }}"><?php _e( 'Live Preview' ); ?></span>
+                               <# } else { #>
+                                       <button type="button" class="button theme-install" data-slug="{{ data.id }}"><?php _e( 'Install' ); ?></button>
+                                       <button type="button" class="button button-primary theme-install preview" data-slug="{{ data.id }}"><?php _e( 'Install &amp; Preview' ); ?></button>
+                               <# } #>
+                       </div>
</ins><span class="cx" style="display: block; padding: 0 10px">                 </div>
</span><span class="cx" style="display: block; padding: 0 10px">        </script>
</span><span class="cx" style="display: block; padding: 0 10px">        <?php
</span></span></pre></div>
<a id="trunksrcwpadminjscustomizecontrolsjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/js/customize-controls.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/js/customize-controls.js       2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/js/customize-controls.js 2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1187,13 +1187,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        section.containerParent = api.ensure( section.containerParent );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Watch for changes to the panel state
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Watch for changes to the panel state.
</ins><span class="cx" style="display: block; padding: 0 10px">                         inject = function ( panelId ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                var parentContainer;
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( panelId ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        // The panel has been supplied, so wait until the panel object is registered
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 // The panel has been supplied, so wait until the panel object is registered.
</ins><span class="cx" style="display: block; padding: 0 10px">                                         api.panel( panelId, function ( panel ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                // The panel has been registered, wait for it to become ready/initialized
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         // The panel has been registered, wait for it to become ready/initialized.
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 panel.deferred.embedded.done( function () {
</span><span class="cx" style="display: block; padding: 0 10px">                                                        parentContainer = panel.contentContainer;
</span><span class="cx" style="display: block; padding: 0 10px">                                                        if ( ! section.headContainer.parent().is( parentContainer ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1218,7 +1218,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        };
</span><span class="cx" style="display: block; padding: 0 10px">                        section.panel.bind( inject );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        inject( section.panel.get() ); // Since a section may never get a panel, assume that it won't ever get one
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 inject( section.panel.get() ); // Since a section may never get a panel, assume that it won't ever get one.
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1393,8 +1393,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="cx" style="display: block; padding: 0 10px">         * wp.customize.ThemesSection
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * Custom section for themes that functions similarly to a backwards panel,
-        * and also handles the theme-details view rendering and navigation.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Custom section for themes that loads themes by category, and also
+        * handles the theme-details view rendering and navigation.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @constructor
</span><span class="cx" style="display: block; padding: 0 10px">         * @augments wp.customize.Section
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1405,20 +1405,76 @@
</span><span class="cx" style="display: block; padding: 0 10px">                overlay: '',
</span><span class="cx" style="display: block; padding: 0 10px">                template: '',
</span><span class="cx" style="display: block; padding: 0 10px">                screenshotQueue: null,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $window: $( window ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $window: null,
+               $body: null,
+               loaded: 0,
+               loading: false,
+               fullyLoaded: false,
+               term: '',
+               tags: '',
+               nextTerm: '',
+               nextTags: '',
+               filtersHeight: 0,
+               headerContainer: null,
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * @since 4.2.0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * Initialize.
+                *
+                * @since 4.9.0
+                *
+                * @param {string} id - ID.
+                * @param {object} options - Options.
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                initialize: function () {
-                       this.$customizeSidebar = $( '.wp-full-overlay-sidebar-content:first' );
-                       return api.Section.prototype.initialize.apply( this, arguments );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         initialize: function( id, options ) {
+                       var section = this;
+                       section.headerContainer = $();
+                       section.$window = $( window );
+                       section.$body = $( document.body );
+                       api.Section.prototype.initialize.call( section, id, options );
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * Embed the section in the DOM when the themes panel is ready.
+                *
+                * Insert the section before the themes container. Assume that a themes section is within a panel, but not necessarily the themes panel.
+                *
+                * @since 4.9.0
+                */
+               embed: function() {
+                       var inject,
+                               section = this;
+
+                       // Watch for changes to the panel state
+                       inject = function( panelId ) {
+                               var parentContainer;
+                               api.panel( panelId, function( panel ) {
+
+                                       // The panel has been registered, wait for it to become ready/initialized
+                                       panel.deferred.embedded.done( function() {
+                                               parentContainer = panel.contentContainer;
+                                               if ( ! section.headContainer.parent().is( parentContainer ) ) {
+                                                       parentContainer.find( '.customize-themes-full-container-container' ).before( section.headContainer );
+                                               }
+                                               if ( ! section.contentContainer.parent().is( section.headContainer ) ) {
+                                                       section.containerParent.append( section.contentContainer );
+                                               }
+                                               section.deferred.embedded.resolve();
+                                       });
+                               } );
+                       };
+                       section.panel.bind( inject );
+                       inject( section.panel.get() ); // Since a section may never get a panel, assume that it won't ever get one
+               },
+
+               /**
+                * Set up.
+                *
</ins><span class="cx" style="display: block; padding: 0 10px">                  * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                ready: function () {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         ready: function() {
</ins><span class="cx" style="display: block; padding: 0 10px">                         var section = this;
</span><span class="cx" style="display: block; padding: 0 10px">                        section.overlay = section.container.find( '.theme-overlay' );
</span><span class="cx" style="display: block; padding: 0 10px">                        section.template = wp.template( 'customize-themes-details-view' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1441,20 +1497,28 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                // Pressing the escape key fires a theme:collapse event
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( 27 === event.keyCode ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        section.closeDetails();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 if ( section.$body.hasClass( 'modal-open' ) ) {
+
+                                               // Escape from the details modal.
+                                               section.closeDetails();
+                                       } else {
+
+                                               // Escape from the inifinite scroll list.
+                                               section.headerContainer.find( '.customize-themes-section-title' ).focus();
+                                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                                         event.stopPropagation(); // Prevent section from being collapsed.
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        _.bindAll( this, 'renderScreenshots' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 _.bindAll( this, 'renderScreenshots', 'loadMore', 'checkTerm', 'filtersChecked' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="cx" style="display: block; padding: 0 10px">                 * Override Section.isContextuallyActive method.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * Ignore the active states' of the contained theme controls, and just
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * use the section's own active state instead. This ensures empty search
-                * results for themes to cause the section to become inactive.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * use the section's own active state instead. This prevents empty search
+                * results for theme sections from causing the section to become inactive.
</ins><span class="cx" style="display: block; padding: 0 10px">                  *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1465,10 +1529,14 @@
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * Attach events.
+                *
</ins><span class="cx" style="display: block; padding: 0 10px">                  * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                attachEvents: function () {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        var section = this;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 var section = this, debounced;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        // Expand/Collapse accordion sections on click.
</span><span class="cx" style="display: block; padding: 0 10px">                        section.container.find( '.customize-section-back' ).on( 'click keydown', function( event ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1479,78 +1547,108 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                section.collapse();
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Expand/Collapse section/panel.
-                       section.container.find( '.change-theme, .customize-theme' ).on( 'click keydown', function( event ) {
-                               if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
-                                       return;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 section.headerContainer = $( '#accordion-section-' + section.id );
+
+                       // Expand section/panel. Only collapse when opening another section.
+                       section.headerContainer.on( 'click', '.customize-themes-section-title', function() {
+
+                               // Toggle accordion filters under section headers.
+                               if ( section.headerContainer.find( '.filter-details' ).length ) {
+                                       section.headerContainer.find( '.customize-themes-section-title' )
+                                               .toggleClass( 'details-open' )
+                                               .attr( 'aria-expanded', function( i, attr ) {
+                                                       return 'true' === attr ? 'false' : 'true';
+                                               });
+                                       section.headerContainer.find( '.filter-details' ).slideToggle( 180 );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                event.preventDefault(); // Keep this AFTER the key filter above
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                if ( section.expanded() ) {
-                                       section.collapse();
-                               } else {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Open the section.
+                               if ( ! section.expanded() ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                         section.expand();
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Theme navigation in details view.
-                       section.container.on( 'click keydown', '.left', function( event ) {
-                               if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Preview installed themes.
+                       section.container.on( 'click', '.theme-actions .preview-theme', function() {
+                               var themeId = $( this ).data( 'slug' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                event.preventDefault(); // Keep this AFTER the key filter above
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         $( '.wp-full-overlay' ).addClass( 'customize-loading' );
+                               api.panel( 'themes' ).loadThemePreview( themeId ).fail( function() {
+                                       $( '.wp-full-overlay' ).removeClass( 'customize-loading' );
+                               } );
+                       });
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        // Theme navigation in details view.
+                       section.container.on( 'click', '.left', function() {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 section.previousTheme();
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        section.container.on( 'click keydown', '.right', function( event ) {
-                               if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
-                                       return;
-                               }
-
-                               event.preventDefault(); // Keep this AFTER the key filter above
-
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 section.container.on( 'click', '.right', function() {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 section.nextTheme();
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        section.container.on( 'click keydown', '.theme-backdrop, .close', function( event ) {
-                               if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
-                                       return;
-                               }
-
-                               event.preventDefault(); // Keep this AFTER the key filter above
-
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 section.container.on( 'click', '.theme-backdrop, .close', function() {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 section.closeDetails();
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        var renderScreenshots = _.throttle( _.bind( section.renderScreenshots, this ), 100 );
-                       section.container.on( 'input', '#themes-filter', function( event ) {
-                               var count,
-                                       term = event.currentTarget.value.toLowerCase().trim().replace( '-', ' ' ),
-                                       controls = section.controls();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Filter-search all theme objects loaded in the section.
+                       section.container.on( 'input', '.wp-filter-search-themes', function( event ) {
+                                       section.filterSearch( event.currentTarget );
+                       });
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                _.each( controls, function( control ) {
-                                       control.filter( term );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Event listeners for remote wporg queries with user-entered terms.
+                       if ( 'wporg' === section.params.action ) {
+
+                               // Search terms.
+                               debounced = _.debounce( section.checkTerm, 500 ); // Wait until there is no input for 500 milliseconds to initiate a search.
+                               section.contentContainer.on( 'input', '#wp-filter-search-input', function() {
+                                       debounced( section );
+                                       if ( ! section.expanded() ) {
+                                               section.expand();
+                                       }
+                                       section.checkTerm( section );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                renderScreenshots();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Feature filters.
+                               section.contentContainer.on( 'click', '.filter-group input', function() {
+                                       section.filtersChecked();
+                                       section.checkTerm( section );
+                               });
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // Update theme count.
-                               count = section.container.find( 'li.customize-control:visible' ).length;
-                               section.container.find( '.theme-count' ).text( count );
-                       });
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Toggle feature filter sections.
+                               section.contentContainer.on( 'click', '.feature-filter-toggle', function( e ) {
+                                       $( e.currentTarget )
+                                               .toggleClass( 'open' )
+                                               .attr( 'aria-expanded', function( i, attr ) {
+                                                       return 'true' === attr ? 'false' : 'true';
+                                               })
+                                               .next( '.filter-drawer' ).slideToggle( 180, 'linear', function() {
+                                                       if ( 0 === section.filtersHeight ) {
+                                                               section.filtersHeight = $( this ).height();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Pre-load the first 3 theme screenshots.
-                       api.bind( 'ready', function () {
-                               _.each( section.controls().slice( 0, 3 ), function ( control ) {
-                                       var img, src = control.params.theme.screenshot[0];
-                                       if ( src ) {
-                                               img = new Image();
-                                               img.src = src;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                         // First time, so it's opened.
+                                                               section.contentContainer.find( '.themes' ).css( 'margin-top', section.filtersHeight + 76 );
+                                                       }
+                                               });
+                                       if ( $( e.currentTarget ).hasClass( 'open' ) ) {
+                                               section.contentContainer.find( '.themes' ).css( 'margin-top', section.filtersHeight + 76 );
+                                       } else {
+                                               section.contentContainer.find( '.themes' ).css( 'margin-top', 0 );
</ins><span class="cx" style="display: block; padding: 0 10px">                                         }
</span><span class="cx" style="display: block; padding: 0 10px">                                });
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        }
+
+                       // Setup section cross-linking.
+                       section.contentContainer.on( 'click', '.no-themes-local .search-dotorg-themes', function() {
+                               api.section( 'wporg_themes' ).focus();
</ins><span class="cx" style="display: block; padding: 0 10px">                         });
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                       // Move section controls to the themes area.
+                       api.bind( 'ready', function () {
+                               section.contentContainer = section.container.find( '.customize-themes-section' );
+                               section.contentContainer.appendTo( $( '.customize-themes-full-container' ) );
+                               section.container.add( section.headerContainer );
+                       });
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1561,10 +1659,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Boolean}  expanded
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Object}   args
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Boolean}  args.unchanged
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * @param {Callback} args.completeCallback
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * @param {Function} args.completeCallback
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                onChangeExpanded: function ( expanded, args ) {
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        // Note: there is a second argument 'args' passed
+                       var section = this,
+                               container = section.contentContainer.closest( '.customize-themes-full-container' );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         // Immediately call the complete callback if there were no changes
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( args.unchanged ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( args.completeCallback ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1573,76 +1676,377 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                return;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Note: there is a second argument 'args' passed
-                       var panel = this,
-                               section = panel.contentContainer,
-                               overlay = section.closest( '.wp-full-overlay' ),
-                               container = section.closest( '.wp-full-overlay-sidebar-content' ),
-                               customizeBtn = section.find( '.customize-theme' ),
-                               changeBtn = panel.headContainer.find( '.change-theme' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( expanded ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( expanded && ! section.hasClass( 'current-panel' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Try to load controls if none are loaded yet.
+                               if ( 0 === section.loaded ) {
+                                       section.loadControls();
+                               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                                 // Collapse any sibling sections/panels
</span><span class="cx" style="display: block; padding: 0 10px">                                api.section.each( function ( otherSection ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        if ( otherSection !== panel ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 var searchTerm;
+
+                                       if ( otherSection !== section ) {
+
+                                               // Try to sync the current search term to the new section.
+                                               if ( 'themes' === otherSection.params.type ) {
+                                                       searchTerm = otherSection.contentContainer.find( '.wp-filter-search' ).val();
+                                                       section.contentContainer.find( '.wp-filter-search' ).val( searchTerm );
+
+                                                       // Directly initialize an empty remote search to avoid a race condition.
+                                                       if ( '' === searchTerm && '' !== section.term && 'installed' !== section.params.action ) {
+                                                               section.term = '';
+                                                               section.initializeNewQuery( section.term, section.tags );
+                                                       } else {
+                                                               section.checkTerm( section );
+                                                       }
+                                                       section.filterSearch( section.contentContainer.find( '.wp-filter-search' ).get( 0 ) );
+                                               }
</ins><span class="cx" style="display: block; padding: 0 10px">                                                 otherSection.collapse( { duration: args.duration } );
</span><span class="cx" style="display: block; padding: 0 10px">                                        }
</span><span class="cx" style="display: block; padding: 0 10px">                                });
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                api.panel.each( function ( otherPanel ) {
-                                       otherPanel.collapse( { duration: 0 } );
-                               });
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                panel._animateChangeExpanded( function() {
-                                       changeBtn.attr( 'tabindex', '-1' );
-                                       customizeBtn.attr( 'tabindex', '0' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         section.contentContainer.addClass( 'current-section' );
+                               container.scrollTop();
+                               section.headerContainer.find( '.customize-themes-section-title' ).addClass( 'selected' ).attr( 'aria-expanded', 'true' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        customizeBtn.focus();
-                                       section.css( 'top', '' );
-                                       container.scrollTop( 0 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         container.on( 'scroll', _.throttle( section.renderScreenshots, 300 ) );
+                               container.on( 'scroll', _.throttle( section.loadMore, 300 ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        if ( args.completeCallback ) {
-                                               args.completeCallback();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( args.completeCallback ) {
+                                       args.completeCallback();
+                               }
+                               section.updateCount(); // Show this section's count.
+                       } else {
+                               section.contentContainer.removeClass( 'current-section' );
+
+                               // Always hide, even if they don't exist or are already hidden.
+                               section.headerContainer.find( '.customize-themes-section-title' ).removeClass( 'selected details-open' ).attr( 'aria-expanded', 'false' );
+                               section.headerContainer.find( '.filter-details' ).slideUp( 180 );
+
+                               container.off( 'scroll' );
+
+                               if ( args.completeCallback ) {
+                                       args.completeCallback();
+                               }
+                       }
+               },
+
+               /**
+                * Return the section's content element without detaching from the parent.
+                *
+                * @since 4.9.0
+                *
+                * @returns {jQuery}
+                */
+               getContent: function() {
+                       return this.container.find( '.control-section-content' );
+               },
+
+               /**
+                * Load theme data via Ajax and add themes to the section as controls.
+                *
+                * @since 4.9.0
+                *
+                * @returns {void}
+                */
+               loadControls: function() {
+                       var section = this, params, page, request;
+
+                       if ( section.loading ) {
+                               return; // We're already loading a batch of themes.
+                       }
+
+                       // Parameters for every API query. Additional params are set in PHP.
+                       page = Math.ceil( section.loaded / 100 ) + 1;
+                       params = {
+                               'switch-themes-nonce': api.settings.nonce['switch-themes'],
+                               'wp_customize': 'on',
+                               'theme_action': section.params.action,
+                               'customized_theme': api.settings.theme.stylesheet,
+                               'page': page
+                       };
+
+                       // Add fields for wporg actions.
+                       if ( 'wporg' === section.params.action ) {
+                               params.search = section.term;
+                               params.tags = section.tags;
+                       }
+
+                       // Load themes.
+                       section.headContainer.closest( '.wp-full-overlay' ).addClass( 'loading' );
+                       section.loading = true;
+                       section.container.find( '.no-themes' ).hide();
+                       request = wp.ajax.post( 'customize-load-themes', params );
+                       request.done(function( data ) {
+                               var themes = data.themes, themeControl, newThemeControls;
+
+                               // Stop and try again if the term changed while loading.
+                               if ( '' !== section.nextTerm || '' !== section.nextTags ) {
+                                       if ( section.nextTerm ) {
+                                               section.term = section.nextTerm;
</ins><span class="cx" style="display: block; padding: 0 10px">                                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                } );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 if ( section.nextTags ) {
+                                               section.tags = section.nextTags;
+                                       }
+                                       section.nextTerm = '';
+                                       section.nextTags = '';
+                                       section.loading = false;
+                                       section.loadControls();
+                                       return;
+                               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                overlay.addClass( 'in-themes-panel' );
-                               section.addClass( 'current-panel' );
-                               _.delay( panel.renderScreenshots, 10 ); // Wait for the controls
-                               panel.$customizeSidebar.on( 'scroll.customize-themes-section', _.throttle( panel.renderScreenshots, 300 ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( 0 !== themes.length ) {
+                                       newThemeControls = [];
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        } else if ( ! expanded && section.hasClass( 'current-panel' ) ) {
-                               panel._animateChangeExpanded( function() {
-                                       changeBtn.attr( 'tabindex', '0' );
-                                       customizeBtn.attr( 'tabindex', '-1' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 // Add controls for each theme.
+                                       _.each( themes, function( theme ) {
+                                               var customizeId = section.params.action + '_theme_' + theme.id;
+                                               themeControl = new api.controlConstructor.theme( customizeId, {
+                                                       params: {
+                                                               type: 'theme',
+                                                               content: '<li id="customize-control-theme-' + section.params.action + '_' + theme.id + '" class="customize-control customize-control-theme"></li>',
+                                                               section: section.params.id,
+                                                               active: true,
+                                                               theme: theme,
+                                                               priority: section.loaded + 1
+                                                       },
+                                                       previewer: api.previewer
+                                               } );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        changeBtn.focus();
-                                       section.css( 'top', '' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         api.control.add( customizeId, themeControl );
+                                               newThemeControls.push( themeControl );
+                                               section.loaded = section.loaded + 1;
+                                       });
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        if ( args.completeCallback ) {
-                                               args.completeCallback();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 if ( 1 === page ) {
+
+                                               // Pre-load the first 3 theme screenshots.
+                                               _.each( section.controls().slice( 0, 3 ), function( control ) {
+                                                       var img, src = control.params.theme.screenshot[0];
+                                                       if ( src ) {
+                                                               img = new Image();
+                                                               img.src = src;
+                                                       }
+                                               });
+                                               if ( 'installed' !== section.params.action ) {
+                                                       wp.a11y.speak( api.settings.l10n.themeSearchResults.replace( '%d', data.info.results ) );
+                                               }
+                                       } else {
+                                               Array.prototype.push.apply( section.screenshotQueue, newThemeControls ); // Add new themes to the screenshot queue.
</ins><span class="cx" style="display: block; padding: 0 10px">                                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                } );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 _.delay( section.renderScreenshots, 100 ); // Wait for the controls to become visible.
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                overlay.removeClass( 'in-themes-panel' );
-                               section.removeClass( 'current-panel' );
-                               panel.$customizeSidebar.off( 'scroll.customize-themes-section' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 if ( 'installed' === section.params.action || 100 > themes.length ) { // If we have less than the requested 100 themes, it's the end of the list.
+                                               section.fullyLoaded = true;
+                                       }
+                               } else {
+                                       if ( 0 === section.loaded ) {
+                                               section.container.find( '.no-themes' ).show();
+                                               wp.a11y.speak( section.container.find( '.no-themes' ).text() );
+                                       } else {
+                                               section.fullyLoaded = true;
+                                       }
+                               }
+                               if ( 'installed' === section.params.action ) {
+                                       section.updateCount(); // Count of visible theme controls.
+                               } else {
+                                       section.updateCount( data.info.results ); // Total number of results including pages not yet loaded.
+                               }
+                               section.container.find( '.unexpected-error' ).hide(); // Hide error notice in case it was previously shown.
+
+                               // This cannot run on request.always, as section.loading may turn false before the new controls load in the success case.
+                               section.headContainer.closest( '.wp-full-overlay' ).removeClass( 'loading' );
+                               section.loading = false;
+                       });
+                       request.fail(function( data ) {
+                               if ( 'undefined' === typeof data ) {
+                                       section.container.find( '.unexpected-error' ).show();
+                                       wp.a11y.speak( section.container.find( '.unexpected-error' ).text() );
+                               } else if ( 'undefined' !== typeof console && console.error ) {
+                                       console.error( data );
+                               }
+
+                               // This cannot run on request.always, as section.loading may turn false before the new controls load in the success case.
+                               section.headContainer.closest( '.wp-full-overlay' ).removeClass( 'loading' );
+                               section.loading = false;
+                       });
+               },
+
+               /**
+                * Determines whether more themes should be loaded, and loads them.
+                *
+                * @since 4.9.0
+                * @returns {void}
+                */
+               loadMore: function() {
+                       var section = this, container, bottom, threshold;
+                       if ( ! section.fullyLoaded && ! section.loading ) {
+                               container = section.container.closest( '.customize-themes-full-container' );
+
+                               bottom = container.scrollTop() + container.height();
+                               threshold = container.prop( 'scrollHeight' ) - 3000; // Use a fixed distance to the bottom of loaded results to avoid unnecessarily loading results sooner when using a percentage of scroll distance.
+
+                               if ( bottom > threshold ) {
+                                       section.loadControls();
+                               }
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * Event handler for search input that filters visible controls.
+                *
+                * @since 4.9.0
+                *
+                * @param {Element} el - The search input element as a raw JS object.
+                * @returns {void}
+                */
+               filterSearch: function( el ) {
+                       var count = 0,
+                               visible = false,
+                               section = this,
+                               noFilter = ( undefined !== api.section( 'wporg_themes' ) && 'wporg' !== section.params.action ) ? '.no-themes-local' : '.no-themes',
+                               term = el.value.toLowerCase().trim().replace( '-', ' ' ),
+                               controls = section.controls(),
+                               renderScreenshots;
+
+                       if ( section.loading ) {
+                               return;
+                       }
+
+                       _.each( controls, function( control ) {
+                               visible = control.filter( term );
+                               if ( visible ) {
+                                       count = count + 1;
+                               }
+                       });
+
+                       if ( 0 === count ) {
+                               section.container.find( noFilter ).show();
+                               wp.a11y.speak( section.container.find( noFilter ).text() );
+                       } else {
+                               section.container.find( noFilter ).hide();
+                       }
+
+                       renderScreenshots = _.throttle( _.bind( section.renderScreenshots, this ), 100 );
+
+                       renderScreenshots();
+
+                       // Update theme count.
+                       section.updateCount( count );
+               },
+
+               /**
+                * Event handler for search input that determines if the terms have changed and loads new controls as needed.
+                *
+                * @since 4.9.0
+                *
+                * @param {wp.customize.ThemesSection} section - The current theme section, passed through the debouncer.
+                * @returns {void}
+                */
+               checkTerm: function( section ) {
+                       var newTerm;
+                       if ( 'wporg' === section.params.action ) {
+                               newTerm = $( '#wp-filter-search-input' ).val();
+                               if ( section.term !== newTerm ) {
+                                       section.initializeNewQuery( newTerm, section.tags );
+                               }
+                       }
+               },
+
+               /**
+                * Check for filters checked in the feature filter list and initialize a new query.
+                *
+                * @since 4.9.0
+                *
+                * @returns {void}
+                */
+               filtersChecked: function() {
+                       var section = this,
+                           items = section.container.find( '.filter-group' ).find( ':checkbox' ),
+                           tags = [];
+
+                       _.each( items.filter( ':checked' ), function( item ) {
+                               tags.push( $( item ).prop( 'value' ) );
+                       });
+
+                       // When no filters are checked, restore initial state. Update filter count.
+                       if ( 0 === tags.length ) {
+                               tags = '';
+                               section.contentContainer.find( '.feature-filter-toggle .filter-count-0' ).show();
+                               section.contentContainer.find( '.feature-filter-toggle .filter-count-filters' ).hide();
+                       } else {
+                               section.contentContainer.find( '.feature-filter-toggle .theme-filter-count' ).text( tags.length );
+                               section.contentContainer.find( '.feature-filter-toggle .filter-count-0' ).hide();
+                               section.contentContainer.find( '.feature-filter-toggle .filter-count-filters' ).show();
+                       }
+
+                       // Check whether tags have changed, and either load or queue them.
+                       if ( ! _.isEqual( section.tags, tags ) ) {
+                               if ( section.loading ) {
+                                       section.nextTags = tags;
+                               } else {
+                                       section.initializeNewQuery( section.term, tags );
+                               }
+                       }
+               },
+
+               /**
+                * Reset the current query and load new results.
+                *
+                * @since 4.9.0
+                *
+                * @param {string} newTerm - New term.
+                * @param {Array} newTags - New tags.
+                * @returns {void}
+                */
+               initializeNewQuery: function( newTerm, newTags ) {
+                       var section = this;
+
+                       // Clear the controls in the section.
+                       _.each( section.controls(), function( control ) {
+                               control.container.remove();
+                               api.control.remove( control.id );
+                       });
+                       section.loaded = 0;
+                       section.fullyLoaded = false;
+                       section.screenshotQueue = null;
+
+                       // Run a new query, with loadControls handling paging, etc.
+                       if ( ! section.loading ) {
+                               section.term = newTerm;
+                               section.tags = newTags;
+                               section.loadControls();
+                       } else {
+                               section.nextTerm = newTerm; // This will reload from loadControls() with the newest term once the current batch is loaded.
+                               section.nextTags = newTags; // This will reload from loadControls() with the newest tags once the current batch is loaded.
+                       }
+                       if ( ! section.expanded() ) {
+                               section.expand(); // Expand the section if it isn't expanded.
+                       }
+               },
+
+               /**
</ins><span class="cx" style="display: block; padding: 0 10px">                  * Render control's screenshot if the control comes into view.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                renderScreenshots: function( ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         renderScreenshots: function() {
</ins><span class="cx" style="display: block; padding: 0 10px">                         var section = this;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Fill queue initially.
-                       if ( section.screenshotQueue === null ) {
-                               section.screenshotQueue = section.controls();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Fill queue initially, or check for more if empty.
+                       if ( null === section.screenshotQueue || 0 === section.screenshotQueue.length ) {
+
+                               // Add controls that haven't had their screenshots rendered.
+                               section.screenshotQueue = _.filter( section.controls(), function( control ) {
+                                       return ! control.screenshotRendered;
+                               });
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Are all screenshots rendered?
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Are all screenshots rendered (for now)?
</ins><span class="cx" style="display: block; padding: 0 10px">                         if ( ! section.screenshotQueue.length ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                return;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1678,9 +2082,52 @@
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * Get visible count.
+                *
+                * @since 4.9.0
+                *
+                * @returns {int} Visible count.
+                */
+               getVisibleCount: function() {
+                       return this.contentContainer.find( 'li.customize-control:visible' ).length;
+               },
+
+               /**
+                * Update the number of themes in the section.
+                *
+                * @since 4.9.0
+                *
+                * @returns {void}
+                */
+               updateCount: function( count ) {
+                       var section = this, countEl, displayed;
+
+                       if ( ! count && 0 !== count ) {
+                               count = section.getVisibleCount();
+                       }
+
+                       displayed = section.contentContainer.find( '.themes-displayed' );
+                       countEl = section.contentContainer.find( '.theme-count' );
+
+                       if ( 0 === count ) {
+                               countEl.text( '0' );
+                       } else {
+
+                               // Animate the count change for emphasis.
+                               displayed.fadeOut( 180, function() {
+                                       countEl.text( count );
+                                       displayed.fadeIn( 180 );
+                               } );
+                               wp.a11y.speak( api.settings.l10n.announceThemeCount.replace( '%d', count ) );
+                       }
+               },
+
+               /**
</ins><span class="cx" style="display: block; padding: 0 10px">                  * Advance the modal to the next theme.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                nextTheme: function () {
</span><span class="cx" style="display: block; padding: 0 10px">                        var section = this;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1695,15 +2142,17 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * Get the next theme model.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {object|boolean} Next theme.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                getNextTheme: function () {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        var control, next;
-                       control = api.control( 'theme_' + this.currentTheme );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 var section = this, control, next;
+                       control = api.control( section.params.action + '_theme_' + this.currentTheme );
</ins><span class="cx" style="display: block; padding: 0 10px">                         next = control.container.next( 'li.customize-control-theme' );
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! next.length ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                return false;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        next = next[0].id.replace( 'customize-control-', '' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 next = next[0].id.replace( 'customize-control-theme-' + section.params.action, section.params.action + '_theme' );
</ins><span class="cx" style="display: block; padding: 0 10px">                         control = api.control( next );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        return control.params.theme;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1713,6 +2162,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * Advance the modal to the previous theme.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                previousTheme: function () {
</span><span class="cx" style="display: block; padding: 0 10px">                        var section = this;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1727,15 +2177,16 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * Get the previous theme model.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * @returns {object|boolean} Previous theme.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                getPreviousTheme: function () {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        var control, previous;
-                       control = api.control( 'theme_' + this.currentTheme );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 var section = this, control, previous;
+                       control = api.control( section.params.action + '_theme_' + this.currentTheme );
</ins><span class="cx" style="display: block; padding: 0 10px">                         previous = control.container.prev( 'li.customize-control-theme' );
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! previous.length ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                return false;
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        previous = previous[0].id.replace( 'customize-control-', '' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 previous = previous[0].id.replace( 'customize-control-theme-' + section.params.action, section.params.action + '_theme' );
</ins><span class="cx" style="display: block; padding: 0 10px">                         control = api.control( previous );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        return control.params.theme;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1745,6 +2196,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * Disable buttons when we're viewing the first or last theme.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                updateLimits: function () {
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! this.getNextTheme() ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1820,52 +2273,46 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * @param {Object}   theme
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * @param {object} theme - Theme.
+                * @param {Function} [callback] - Callback once the details have been shown.
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                showDetails: function ( theme, callback ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        var section = this, link;
-                       callback = callback || function(){};
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 var section = this;
</ins><span class="cx" style="display: block; padding: 0 10px">                         section.currentTheme = theme.id;
</span><span class="cx" style="display: block; padding: 0 10px">                        section.overlay.html( section.template( theme ) )
</span><span class="cx" style="display: block; padding: 0 10px">                                .fadeIn( 'fast' )
</span><span class="cx" style="display: block; padding: 0 10px">                                .focus();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $( 'body' ).addClass( 'modal-open' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 section.$body.addClass( 'modal-open' );
</ins><span class="cx" style="display: block; padding: 0 10px">                         section.containFocus( section.overlay );
</span><span class="cx" style="display: block; padding: 0 10px">                        section.updateLimits();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                       link = section.overlay.find( '.inactive-theme > a' );
-
-                       link.on( 'click', function( event ) {
-                               event.preventDefault();
-
-                               // Short-circuit if request is currently being made.
-                               if ( link.hasClass( 'disabled' ) ) {
-                                       return;
-                               }
-                               link.addClass( 'disabled' );
-
-                               section.loadThemePreview( theme.id ).fail( function() {
-                                       link.removeClass( 'disabled' );
-                               } );
-                       } );
-                       callback();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 wp.a11y.speak( api.settings.l10n.announceThemeDetails.replace( '%s', theme.name ) );
+                       if ( callback ) {
+                               callback();
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="cx" style="display: block; padding: 0 10px">                 * Close the theme details modal.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                closeDetails: function () {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $( 'body' ).removeClass( 'modal-open' );
-                       this.overlay.fadeOut( 'fast' );
-                       api.control( 'theme_' + this.currentTheme ).focus();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 var section = this;
+                       section.$body.removeClass( 'modal-open' );
+                       section.overlay.fadeOut( 'fast' );
+                       api.control( section.params.action + '_theme_' + section.currentTheme ).container.find( '.theme' ).focus();
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="cx" style="display: block; padding: 0 10px">                 * Keep tab focus within the theme details modal.
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 *
+                * @param {jQuery} el - Element to contain focus.
+                * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                containFocus: function( el ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var tabbables;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1918,7 +2365,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        var section = this;
</span><span class="cx" style="display: block; padding: 0 10px">                        section.containerParent = '#customize-outer-theme-controls';
</span><span class="cx" style="display: block; padding: 0 10px">                        section.containerPaneParent = '.customize-outer-pane-parent';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        return api.Section.prototype.initialize.apply( section, arguments );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 api.Section.prototype.initialize.apply( section, arguments );
</ins><span class="cx" style="display: block; padding: 0 10px">                 },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1939,7 +2386,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                content = section.contentContainer,
</span><span class="cx" style="display: block; padding: 0 10px">                                backBtn = content.find( '.customize-section-back' ),
</span><span class="cx" style="display: block; padding: 0 10px">                                sectionTitle = section.headContainer.find( '.accordion-section-title' ).first(),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                body = $( 'body' ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         body = $( document.body ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                 expand, panel;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        body.toggleClass( 'outer-section-open', expanded );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2058,8 +2505,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! panel.contentContainer.parent().is( panel.headContainer ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                container.append( panel.contentContainer );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                panel.renderContent();
</del><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        panel.renderContent();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        panel.deferred.embedded.resolve();
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2131,7 +2578,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.1.0
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * @returns {boolean}
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * @returns {boolean} Whether contextually active.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                isContextuallyActive: function () {
</span><span class="cx" style="display: block; padding: 0 10px">                        var panel = this,
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2146,7 +2593,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * Update UI to reflect expanded state
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * Update UI to reflect expanded state.
</ins><span class="cx" style="display: block; padding: 0 10px">                  *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.1.0
</span><span class="cx" style="display: block; padding: 0 10px">                 *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2154,6 +2601,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Object}   args
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Boolean}  args.unchanged
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Function} args.completeCallback
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * @returns {void}
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                onChangeExpanded: function ( expanded, args ) {
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2265,6 +2713,334 @@
</span><span class="cx" style="display: block; padding: 0 10px">        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Class wp.customize.ThemesPanel.
+        *
+        * Custom section for themes that displays without the customize preview.
+        *
+        * @constructor
+        * @augments wp.customize.Panel
+        * @augments wp.customize.Container
+        */
+       api.ThemesPanel = api.Panel.extend({
+
+               /**
+                * Initialize.
+                *
+                * @since 4.9.0
+                *
+                * @param {string} id - The ID for the panel.
+                * @param {object} options - Options.
+                * @returns {void}
+                */
+               initialize: function( id, options ) {
+                       var panel = this;
+                       panel.installingThemes = [];
+                       api.Panel.prototype.initialize.call( panel, id, options );
+               },
+
+               /**
+                * Attach events.
+                *
+                * @since 4.9.0
+                * @returns {void}
+                */
+               attachEvents: function() {
+                       var panel = this;
+
+                       // Attach regular panel events.
+                       api.Panel.prototype.attachEvents.apply( panel );
+
+                       // Collapse panel to customize the current theme.
+                       panel.contentContainer.on( 'click', '.customize-theme', function() {
+                               panel.collapse();
+                       });
+
+                       // Toggle between filtering and browsing themes on mobile.
+                       panel.contentContainer.on( 'click', '.customize-themes-section-title, .customize-themes-mobile-back', function() {
+                               $( '.wp-full-overlay' ).toggleClass( 'showing-themes' );
+                       });
+
+                       // Install (and maybe preview) a theme.
+                       panel.contentContainer.on( 'click', '.theme-install', function( event ) {
+                               panel.installTheme( event );
+                       });
+
+                       // Update a theme. Theme cards have the class, the details modal has the id.
+                       panel.contentContainer.on( 'click', '.update-theme, #update-theme', function( event ) {
+
+                               // #update-theme is a link.
+                               event.preventDefault();
+                               event.stopPropagation();
+
+                               panel.updateTheme( event );
+                       });
+
+                       // Delete a theme.
+                       panel.contentContainer.on( 'click', '.delete-theme', function( event ) {
+                               panel.deleteTheme( event );
+                       });
+
+                       _.bindAll( panel, 'installTheme', 'updateTheme' );
+               },
+
+               /**
+                * Update UI to reflect expanded state
+                *
+                * @since 4.9.0
+                *
+                * @param {Boolean}  expanded - Expanded state.
+                * @param {Object}   args - Args.
+                * @param {Boolean}  args.unchanged - Whether or not the state changed.
+                * @param {Function} args.completeCallback - Callback to execute when the animation completes.
+                * @returns {void}
+                */
+               onChangeExpanded: function( expanded, args ) {
+                       var panel = this, overlay;
+
+                       // Expand/collapse the panel normally.
+                       api.Panel.prototype.onChangeExpanded.apply( this, [ expanded, args ] );
+
+                       // Immediately call the complete callback if there were no changes
+                       if ( args.unchanged ) {
+                               if ( args.completeCallback ) {
+                                       args.completeCallback();
+                               }
+                               return;
+                       }
+
+                       overlay = panel.headContainer.closest( '.wp-full-overlay' );
+
+                       if ( expanded ) {
+                               overlay
+                                       .addClass( 'in-themes-panel' )
+                                       .delay( 200 ).find( '.customize-themes-full-container' ).addClass( 'animate' );
+
+                               // Automatically open the installed themes section (except on small screens).
+                               if ( 600 < window.innerWidth ) {
+                                       api.section( 'installed_themes' ).expand();
+                               }
+                       } else {
+                               overlay
+                                       .removeClass( 'in-themes-panel' )
+                                       .find( '.customize-themes-full-container' ).removeClass( 'animate' );
+                       }
+               },
+
+               /**
+                * Install a theme via wp.updates.
+                *
+                * @since 4.9.0
+                *
+                * @returns {void}
+                */
+               installTheme: function( event ) {
+                       var panel = this, preview = false, slug = $( event.target ).data( 'slug' );
+
+                       if ( _.contains( panel.installingThemes, slug ) ) {
+                               return; // Theme is already being installed.
+                       }
+
+                       wp.updates.maybeRequestFilesystemCredentials( event );
+
+                       $( document ).one( 'wp-theme-install-success', function( event, response ) {
+                               var theme = false, customizeId, themeControl;
+                               if ( preview ) {
+
+                                       panel.loadThemePreview( slug ).fail( function() {
+                                               $( '.wp-full-overlay' ).removeClass( 'customize-loading' );
+                                       } );
+
+                               } else {
+                                       api.control.each( function( control ) {
+                                               if ( 'theme' === control.params.type && control.params.theme.id === response.slug ) {
+                                                       theme = control.params.theme; // Used below to add theme control.
+                                                       control.rerenderAsInstalled( true );
+                                               }
+                                       });
+
+                                       // Don't add the same theme more than once.
+                                       if ( ! theme || api.control.has( 'installed_theme_' + theme.id ) ) {
+                                               return;
+                                       }
+
+                                       // Add theme control to installed section.
+                                       theme.type = 'installed';
+                                       customizeId = 'installed_theme_' + theme.id;
+                                       themeControl = new api.controlConstructor.theme( customizeId, {
+                                               params: {
+                                                       type: 'theme',
+                                                       content: $( '<li class="customize-control customize-control-theme"></li>' ).attr( 'id', 'customize-control-theme-installed_' + theme.id ).prop( 'outerHTML' ),
+                                                       section: 'installed_themes',
+                                                       active: true,
+                                                       theme: theme,
+                                                       priority: 0 // Add all newly-installed themes to the top.
+                                               },
+                                               previewer: api.previewer
+                                       } );
+
+                                       api.control.add( customizeId, themeControl );
+                                       api.control( customizeId ).container.trigger( 'render-screenshot' );
+
+                                       // Close the details modal if it's open to the installed theme.
+                                       api.section.each( function( section ) {
+                                               if ( 'themes' === section.params.type ) {
+                                                       if ( theme.id === section.currentTheme ) { // Don't close the modal if the user has navigated elsewhere.
+                                                               section.closeDetails();
+                                                       }
+                                               }
+                                       });
+                               }
+                       } );
+
+                       panel.installingThemes.push( $( event.target ).data( 'slug' ) ); // Note: we don't remove elements from installingThemes, since they shouldn't be installed again.
+                       wp.updates.installTheme( {
+                               slug: slug
+                       } );
+
+                       // Also preview the theme as the event is triggered on Install & Preview.
+                       if ( $( event.target ).hasClass( 'preview' ) ) {
+                               preview = true;
+                               $( '.wp-full-overlay' ).addClass( 'customize-loading' );
+                               wp.a11y.speak( $( '#customize-themes-loading-container .customize-loading-text-installing-theme' ).text() );
+                       }
+               },
+
+               /**
+                * Load theme preview.
+                *
+                * @since 4.9.0
+                *
+                * @param {string} themeId Theme ID.
+                * @returns {jQuery.promise} Promise.
+                */
+               loadThemePreview: function( themeId ) {
+                       var deferred = $.Deferred(), onceProcessingComplete, overlay, urlParser;
+
+                       urlParser = document.createElement( 'a' );
+                       urlParser.href = location.href;
+                       urlParser.search = $.param( _.extend(
+                               api.utils.parseQueryString( urlParser.search.substr( 1 ) ),
+                               {
+                                       theme: themeId,
+                                       changeset_uuid: api.settings.changeset.uuid
+                               }
+                       ) );
+
+                       // Update loading message. Everything else is handled by reloading the page.
+                       $( '#customize-themes-loading-container span' ).hide();
+                       $( '#customize-themes-loading-container .customize-loading-text' ).css( 'display', 'block' );
+                       wp.a11y.speak( $( '#customize-themes-loading-container .customize-loading-text' ).text() );
+                       overlay = $( '.wp-full-overlay' );
+                       overlay.addClass( 'customize-loading' );
+
+                       onceProcessingComplete = function() {
+                               var request;
+                               if ( api.state( 'processing' ).get() > 0 ) {
+                                       return;
+                               }
+
+                               api.state( 'processing' ).unbind( onceProcessingComplete );
+
+                               request = api.requestChangesetUpdate();
+                               request.done( function() {
+                                       deferred.resolve();
+                                       $( window ).off( 'beforeunload.customize-confirm' );
+                                       window.location.href = urlParser.href;
+                               } );
+                               request.fail( function() {
+                                       overlay.removeClass( 'customize-loading' );
+                                       deferred.reject();
+                               } );
+                       };
+
+                       if ( 0 === api.state( 'processing' ).get() ) {
+                               onceProcessingComplete();
+                       } else {
+                               api.state( 'processing' ).bind( onceProcessingComplete );
+                       }
+
+                       return deferred.promise();
+               },
+
+               /**
+                * Update a theme via wp.updates.
+                *
+                * @since 4.9.0
+                *
+                * @param {jQuery.Event} event - Event.
+                * @returns {void}
+                */
+               updateTheme: function( event ) {
+                       wp.updates.maybeRequestFilesystemCredentials( event );
+
+                       $( document ).one( 'wp-theme-update-success', function( e, response ) {
+
+                               // Rerender the control to reflect the update.
+                               api.control.each( function( control ) {
+                                       if ( 'theme' === control.params.type && control.params.theme.id === response.slug ) {
+                                               control.params.theme.hasUpdate = false;
+                                               control.rerenderAsInstalled( true );
+                                       }
+                               });
+                       } );
+
+                       wp.updates.updateTheme( {
+                               slug: $( event.target ).closest( '.notice' ).data( 'slug' )
+                       } );
+               },
+
+               /**
+                * Delete a theme via wp.updates.
+                *
+                * @since 4.9.0
+                *
+                * @param {jQuery.Event} event - Event.
+                * @returns {void}
+                */
+               deleteTheme: function( event ) {
+                       var theme, section;
+                       theme = $( event.target ).data( 'slug' );
+                       section = api.section( 'installed_themes' );
+
+                       event.preventDefault();
+
+                       // Confirmation dialog for deleting a theme.
+                       if ( ! window.confirm( api.settings.l10n.confirmDeleteTheme ) ) {
+                               return;
+                       }
+
+                       wp.updates.maybeRequestFilesystemCredentials( event );
+
+                       $( document ).one( 'wp-theme-delete-success', function() {
+                               var control = api.control( 'installed_theme_' + theme );
+
+                               // Remove theme control.
+                               control.container.remove();
+                               api.control.remove( control.id );
+
+                               // Update installed count.
+                               section.loaded = section.loaded - 1;
+                               section.updateCount();
+
+                               // Rerender any other theme controls as uninstalled.
+                               api.control.each( function( control ) {
+                                       if ( 'theme' === control.params.type && control.params.theme.id === theme ) {
+                                               control.rerenderAsInstalled( false );
+                                       }
+                               });
+                       } );
+
+                       wp.updates.deleteTheme( {
+                               slug: theme
+                       } );
+
+                       // Close modal and focus the section.
+                       section.closeDetails();
+                       section.focus();
+               }
+       });
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * A Customizer Control.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * A control provides a UI element that allows a user to modify a Customizer Setting.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2613,7 +3389,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Boolean}  active
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Object}   args
</span><span class="cx" style="display: block; padding: 0 10px">                 * @param {Number}   args.duration
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * @param {Callback} args.completeCallback
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * @param {Function} args.completeCallback
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                onChangeActive: function ( active, args ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( args.unchanged ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3785,35 +4561,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">        api.ThemeControl = api.Control.extend({
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                touchDrag: false,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                isRendered: false,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         screenshotRendered: false,
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * Defer rendering the theme control until the section is displayed.
-                *
</del><span class="cx" style="display: block; padding: 0 10px">                  * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">                 */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                renderContent: function () {
-                       var control = this,
-                               renderContentArgs = arguments;
-
-                       api.section( control.section(), function( section ) {
-                               if ( section.expanded() ) {
-                                       api.Control.prototype.renderContent.apply( control, renderContentArgs );
-                                       control.isRendered = true;
-                               } else {
-                                       section.expanded.bind( function( expanded ) {
-                                               if ( expanded && ! control.isRendered ) {
-                                                       api.Control.prototype.renderContent.apply( control, renderContentArgs );
-                                                       control.isRendered = true;
-                                               }
-                                       } );
-                               }
-                       } );
-               },
-
-               /**
-                * @since 4.2.0
-                */
</del><span class="cx" style="display: block; padding: 0 10px">                 ready: function() {
</span><span class="cx" style="display: block; padding: 0 10px">                        var control = this;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3833,20 +4585,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                // Prevent the modal from showing when the user clicks the action button.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                if ( $( event.target ).is( '.theme-actions .button' ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         if ( $( event.target ).is( '.theme-actions .button, .update-theme' ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                         return;
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                api.section( control.section() ).loadThemePreview( control.params.theme.id );
-                       });
-
-                       control.container.on( 'click keydown', '.theme-actions .theme-details', function( event ) {
-                               if ( api.utils.isKeydownButNotEnterEvent( event ) ) {
-                                       return;
-                               }
-
</del><span class="cx" style="display: block; padding: 0 10px">                                 event.preventDefault(); // Keep this AFTER the key filter above
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del><span class="cx" style="display: block; padding: 0 10px">                                 api.section( control.section() ).showDetails( control.params.theme );
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3857,13 +4600,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                if ( source ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                        $screenshot.attr( 'src', source );
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                control.screenshotRendered = true;
</ins><span class="cx" style="display: block; padding: 0 10px">                         });
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                 * Show or hide the theme based on the presence of the term in the title, description, and author.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+          * Show or hide the theme based on the presence of the term in the title, description, tags, and author.
</ins><span class="cx" style="display: block; padding: 0 10px">                  *
</span><span class="cx" style="display: block; padding: 0 10px">                 * @since 4.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 * @returns {boolean} Whether a theme control was activated or not.
</ins><span class="cx" style="display: block; padding: 0 10px">                  */
</span><span class="cx" style="display: block; padding: 0 10px">                filter: function( term ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var control = this,
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3874,9 +4619,30 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        haystack = haystack.toLowerCase().replace( '-', ' ' );
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( -1 !== haystack.search( term ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                control.activate();
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                return true;
</ins><span class="cx" style="display: block; padding: 0 10px">                         } else {
</span><span class="cx" style="display: block; padding: 0 10px">                                control.deactivate();
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                return false;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                },
+
+               /**
+                * Rerender the theme from its JS template with the installed type.
+                *
+                * @since 4.9.0
+                *
+                * @returns {void}
+                */
+               rerenderAsInstalled: function( installed ) {
+                       var control = this, section;
+                       if ( installed ) {
+                               control.params.theme.type = 'installed';
+                       } else {
+                               section = api.section( control.params.section );
+                               control.params.theme.type = section.params.action;
+                       }
+                       control.renderContent(); // Replaces existing content.
+                       control.container.trigger( 'render-screenshot' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5280,7 +6046,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                date_time:           api.DateTimeControl,
</span><span class="cx" style="display: block; padding: 0 10px">                code_editor:         api.CodeEditorControl
</span><span class="cx" style="display: block; padding: 0 10px">        };
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        api.panelConstructor = {};
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ api.panelConstructor = {
+               themes: api.ThemesPanel
+       };
</ins><span class="cx" style="display: block; padding: 0 10px">         api.sectionConstructor = {
</span><span class="cx" style="display: block; padding: 0 10px">                themes: api.ThemesSection,
</span><span class="cx" style="display: block; padding: 0 10px">                outer: api.OuterSection
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -5399,6 +6167,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Sort the sections within each panel
</span><span class="cx" style="display: block; padding: 0 10px">                api.panel.each( function ( panel ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        if ( 'themes' === panel.id ) {
+                               return; // Don't reflow theme sections, as doing so moves them after the themes container.
+                       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                         var sections = panel.sections(),
</span><span class="cx" style="display: block; padding: 0 10px">                                sectionHeadContainers = _.pluck( sections, 'headContainer' );
</span><span class="cx" style="display: block; padding: 0 10px">                        rootNodes.push( panel );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6223,20 +6995,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                history.replaceState( {}, document.title, urlParser.href );
</span><span class="cx" style="display: block; padding: 0 10px">                        };
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        /**
-                        * Deactivate themes section if changeset status is not auto-draft
-                        */
-                       api.section( 'themes', function( section ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Deactivate themes panel if changeset status is not auto-draft.
+                       api.panel( 'themes', function( panel ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 var canActivate;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                                canActivate = function() {
</span><span class="cx" style="display: block; padding: 0 10px">                                        return ! changesetStatus() || 'auto-draft' === changesetStatus();
</span><span class="cx" style="display: block; padding: 0 10px">                                };
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                section.active.validate = canActivate;
-                               section.active.set( canActivate() );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         panel.active.validate = canActivate;
+                               panel.active.set( canActivate() );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 changesetStatus.bind( function() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        section.active.set( canActivate() );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 panel.active.set( canActivate() );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 } );
</span><span class="cx" style="display: block; padding: 0 10px">                        } );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6400,7 +7170,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Keyboard shortcuts - esc to exit section/panel.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $( 'body' ).on( 'keydown', function( event ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         body.on( 'keydown', function( event ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         var collapsedObject, expandedControls = [], expandedSections = [], expandedPanels = [];
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( 27 !== event.which ) { // Esc.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -6440,6 +7210,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        // Collapse the most granular expanded object.
</span><span class="cx" style="display: block; padding: 0 10px">                        collapsedObject = expandedControls[0] || expandedSections[0] || expandedPanels[0];
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( collapsedObject ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                if ( 'themes' === collapsedObject.params.type ) {
+
+                                       // Themes panel or section.
+                                       if ( body.hasClass( 'modal-open' ) ) {
+                                               collapsedObject.closeDetails();
+                                       } else {
+
+                                               // If we're collapsing a section, collapse the panel also.
+                                               wp.customize.panel( 'themes' ).collapse();
+                                       }
+                                       return;
+                               }
</ins><span class="cx" style="display: block; padding: 0 10px">                                 collapsedObject.collapse();
</span><span class="cx" style="display: block; padding: 0 10px">                                event.preventDefault();
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span></span></pre></div>
<a id="trunksrcwpadminjsupdatesjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/js/updates.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/js/updates.js  2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-admin/js/updates.js    2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -183,7 +183,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                if ( $notice.length ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice.replaceWith( $adminNotice );
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $( '.wrap' ).find( '> h1' ).after( $adminNotice );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( 'customize' === pagenow ) {
+                               $( '.customize-themes-notifications' ).append( $adminNotice );
+                       } else {
+                               $( '.wrap' ).find( '> h1' ).after( $adminNotice );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $document.trigger( 'wp-updates-notice-added' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -930,6 +934,17 @@
</span><span class="cx" style="display: block; padding: 0 10px">                if ( 'themes-network' === pagenow ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice = $( '[data-slug="' + args.slug + '"]' ).find( '.update-message' ).removeClass( 'notice-error' ).addClass( 'updating-message notice-warning' ).find( 'p' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                } else if ( 'customize' === pagenow ) {
+
+                       // Update the theme details UI.
+                       $notice = $( '#update-theme' ).closest( '.notice' ).removeClass( 'notice-large' );
+
+                       $notice.find( 'h3' ).remove();
+
+                       // Add the top-level UI, and update both.
+                       $notice = $notice.add( $( '#customize-control-theme-installed_' + args.slug ).find( '.update-message' ) );
+                       $notice = $notice.addClass( 'updating-message' ).find( 'p' );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 } else {
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice = $( '#update-theme' ).closest( '.notice' ).removeClass( 'notice-large' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -972,6 +987,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        },
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice, newText;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                if ( 'customize' === pagenow ) {
+                       $theme = wp.customize.control( 'installed_theme_' + response.slug ).container;
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( 'themes-network' === pagenow ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice = $theme.find( '.update-message' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1026,6 +1045,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        return;
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                if ( 'customize' === pagenow ) {
+                       $theme = wp.customize.control( 'installed_theme_' + response.slug ).container;
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( 'themes-network' === pagenow ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $notice = $theme.find( '.update-message ' );
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1162,12 +1185,23 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        return;
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( $document.find( 'body' ).hasClass( 'full-overlay-active' ) ) {
-                       $button = $( '.theme-install[data-slug="' + response.slug + '"]' );
-                       $card   = $( '.install-theme-info' ).prepend( $message );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( 'customize' === pagenow ) {
+                       if ( $document.find( 'body' ).hasClass( 'modal-open' ) ) {
+                               $button = $( '.theme-install[data-slug="' + response.slug + '"]' );
+                               $card   = $( '.theme-overlay .theme-info' ).prepend( $message );
+                       } else {
+                               $button = $( '.theme-install[data-slug="' + response.slug + '"]' );
+                               $card   = $button.closest( '.theme' ).addClass( 'theme-install-failed' ).append( $message );
+                       }
+                       $( '.wp-full-overlay' ).removeClass( 'customize-loading' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $card   = $( '[data-slug="' + response.slug + '"]' ).removeClass( 'focus' ).addClass( 'theme-install-failed' ).append( $message );
-                       $button = $card.find( '.theme-install' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( $document.find( 'body' ).hasClass( 'full-overlay-active' ) ) {
+                               $button = $( '.theme-install[data-slug="' + response.slug + '"]' );
+                               $card   = $( '.install-theme-info' ).prepend( $message );
+                       } else {
+                               $card   = $( '[data-slug="' + response.slug + '"]' ).removeClass( 'focus' ).addClass( 'theme-install-failed' ).append( $message );
+                               $button = $card.find( '.theme-install' );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $button
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpcustomizemanagerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-customize-manager.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-customize-manager.php      2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-includes/class-wp-customize-manager.php        2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -320,6 +320,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menus-panel.php' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                require_once( ABSPATH . WPINC . '/customize/class-wp-customize-themes-panel.php' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 require_once( ABSPATH . WPINC . '/customize/class-wp-customize-themes-section.php' );
</span><span class="cx" style="display: block; padding: 0 10px">                require_once( ABSPATH . WPINC . '/customize/class-wp-customize-sidebar-section.php' );
</span><span class="cx" style="display: block; padding: 0 10px">                require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-section.php' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -375,6 +376,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'wp_ajax_customize_save',           array( $this, 'save' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'wp_ajax_customize_refresh_nonces', array( $this, 'refresh_nonces' ) );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                add_action( 'wp_ajax_customize-load-themes',    array( $this, 'load_themes_ajax' ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                 add_action( 'wp_ajax_dismiss_customize_changeset_autosave', array( $this, 'handle_dismiss_changeset_autosave_request' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'customize_register',                 array( $this, 'register_controls' ) );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -392,6 +394,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Export the settings to JS via the _wpCustomizeSettings variable.
</span><span class="cx" style="display: block; padding: 0 10px">                add_action( 'customize_controls_print_footer_scripts', array( $this, 'customize_pane_settings' ), 1000 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               // Add theme update notices.
+               if ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) ) {
+                       require_once ABSPATH . '/wp-admin/includes/update.php';
+                       add_action( 'customize_controls_print_footer_scripts', 'wp_print_admin_notice_templates' );
+               }
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3685,6 +3693,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                foreach ( $this->controls as $control ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $control->enqueue();
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               if ( ! is_multisite() && ( current_user_can( 'install_themes' ) || current_user_can( 'update_themes' ) || current_user_can( 'delete_themes' ) ) ) {
+                       wp_enqueue_script( 'updates' );
+               }
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3889,6 +3901,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $nonces = array(
</span><span class="cx" style="display: block; padding: 0 10px">                        'save' => wp_create_nonce( 'save-customize_' . $this->get_stylesheet() ),
</span><span class="cx" style="display: block; padding: 0 10px">                        'preview' => wp_create_nonce( 'preview-customize_' . $this->get_stylesheet() ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'switch-themes' => wp_create_nonce( 'switch-themes' ),
</ins><span class="cx" style="display: block; padding: 0 10px">                         'dismiss_autosave' => wp_create_nonce( 'dismiss_customize_changeset_autosave' ),
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3995,6 +4008,15 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'autofocus' => $this->get_autofocus(),
</span><span class="cx" style="display: block; padding: 0 10px">                        'documentTitleTmpl' => $this->get_document_title_template(),
</span><span class="cx" style="display: block; padding: 0 10px">                        'previewableDevices' => $this->get_previewable_devices(),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'l10n' => array(
+                               'confirmDeleteTheme' => __( 'Are you sure you want to delete this theme?' ),
+                               /* translators: %d is the number of theme search results, which cannot currently consider singular vs. plural forms */
+                               'themeSearchResults' => __( '%d themes found' ),
+                               /* translators: %d is the number of themes being displayed, which cannot currently consider singular vs. plural forms */
+                               'announceThemeCount' => __( 'Displaying %d themes' ),
+                               /* translators: %s is the theme name */
+                               'announceThemeDetails' => __( 'Showing details for theme: %s' ),
+                       ),
</ins><span class="cx" style="display: block; padding: 0 10px">                 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Prepare Customize Section objects to pass to JavaScript.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4098,8 +4120,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /* Panel, Section, and Control Types */
</span><span class="cx" style="display: block; padding: 0 10px">                $this->register_panel_type( 'WP_Customize_Panel' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $this->register_panel_type( 'WP_Customize_Themes_Panel' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->register_section_type( 'WP_Customize_Section' );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->register_section_type( 'WP_Customize_Sidebar_Section' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $this->register_section_type( 'WP_Customize_Themes_Section' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->register_control_type( 'WP_Customize_Color_Control' );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->register_control_type( 'WP_Customize_Media_Control' );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->register_control_type( 'WP_Customize_Upload_Control' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4159,50 +4183,38 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'default_value' => $initial_date,
</span><span class="cx" style="display: block; padding: 0 10px">                ) ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                /* Themes */
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /* Themes (controls are loaded via ajax) */
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->add_section( new WP_Customize_Themes_Section( $this, 'themes', array(
-                       'title'      => $this->theme()->display( 'Name' ),
-                       'capability' => 'switch_themes',
-                       'priority'   => 0,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->add_panel( new WP_Customize_Themes_Panel( $this, 'themes', array(
+                       'title'       => $this->theme()->display( 'Name' ),
+                       'description' => __( 'Once themes are installed, you can live-preview them on your site, customize them, and publish your new design. Browse available themes via the filters in this menu.' ),
+                       'capability'  => 'switch_themes',
+                       'priority'    => 0,
</ins><span class="cx" style="display: block; padding: 0 10px">                 ) ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // Themes Setting (unused - the theme is considerably more fundamental to the Customizer experience).
-               $this->add_setting( new WP_Customize_Filter_Setting( $this, 'active_theme', array(
-                       'capability' => 'switch_themes',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->add_section( new WP_Customize_Themes_Section( $this, 'installed_themes', array(
+                       'title'       => __( 'Installed themes' ),
+                       'action'      => 'installed',
+                       'capability'  => 'switch_themes',
+                       'panel'       => 'themes',
+                       'priority'    => 0,
</ins><span class="cx" style="display: block; padding: 0 10px">                 ) ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                require_once( ABSPATH . 'wp-admin/includes/theme.php' );
-
-               // Theme Controls.
-
-               // Add a control for the active/original theme.
-               if ( ! $this->is_theme_active() ) {
-                       $themes = wp_prepare_themes_for_js( array( wp_get_theme( $this->original_stylesheet ) ) );
-                       $active_theme = current( $themes );
-                       $active_theme['isActiveTheme'] = true;
-                       $this->add_control( new WP_Customize_Theme_Control( $this, $active_theme['id'], array(
-                               'theme'    => $active_theme,
-                               'section'  => 'themes',
-                               'settings' => 'active_theme',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( ! is_multisite() ) {
+                       $this->add_section( new WP_Customize_Themes_Section( $this, 'wporg_themes', array(
+                               'title'       => __( 'WordPress.org themes' ),
+                               'action'      => 'wporg',
+                               'capability'  => 'install_themes',
+                               'panel'       => 'themes',
+                               'priority'    => 5,
</ins><span class="cx" style="display: block; padding: 0 10px">                         ) ) );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $themes = wp_prepare_themes_for_js();
-               foreach ( $themes as $theme ) {
-                       if ( $theme['active'] || $theme['id'] === $this->original_stylesheet ) {
-                               continue;
-                       }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         // Themes Setting (unused - the theme is considerably more fundamental to the Customizer experience).
+               $this->add_setting( new WP_Customize_Filter_Setting( $this, 'active_theme', array(
+                       'capability' => 'switch_themes',
+               ) ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $theme_id = 'theme_' . $theme['id'];
-                       $theme['isActiveTheme'] = false;
-                       $this->add_control( new WP_Customize_Theme_Control( $this, $theme_id, array(
-                               'theme'    => $theme,
-                               'section'  => 'themes',
-                               'settings' => 'active_theme',
-                       ) ) );
-               }
-
</del><span class="cx" style="display: block; padding: 0 10px">                 /* Site Identity */
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->add_section( 'title_tagline', array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4707,6 +4719,141 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * Load themes into the theme browsing/installation UI.
+        *
+        * @since 4.9.0
+        */
+       public function load_themes_ajax() {
+               check_ajax_referer( 'switch-themes', 'switch-themes-nonce' );
+
+               if ( ! current_user_can( 'switch_themes' ) ) {
+                       wp_die( -1 );
+               }
+
+               if ( empty( $_POST['theme_action'] ) ) {
+                       wp_send_json_error( 'missing_theme_action' );
+               }
+               $theme_action = sanitize_key( $_POST['theme_action'] );
+               $themes = array();
+
+               require_once ABSPATH . 'wp-admin/includes/theme.php';
+               if ( 'installed' === $theme_action ) {
+                       $themes = array( 'themes' => wp_prepare_themes_for_js() );
+                       foreach ( $themes['themes'] as &$theme ) {
+                               $theme['type'] = 'installed';
+                               $theme['active'] = ( isset( $_POST['customized_theme'] ) && $_POST['customized_theme'] === $theme['id'] );
+                       }
+               } elseif ( 'wporg' === $theme_action ) {
+                       if ( ! current_user_can( 'install_themes' ) ) {
+                               wp_die( -1 );
+                       }
+
+                       // Arguments for all queries.
+                       $args = array(
+                               'per_page' => 100,
+                               'page' => isset( $_POST['page'] ) ? absint( $_POST['page'] ) : 1,
+                               'fields' => array(
+                                       'screenshot_url' => true,
+                                       'description' => true,
+                                       'rating' => true,
+                                       'downloaded' => true,
+                                       'downloadlink' => true,
+                                       'last_updated' => true,
+                                       'homepage' => true,
+                                       'num_ratings' => true,
+                                       'tags' => true,
+                                       'parent' => true,
+                                       // 'extended_author' => true, @todo: WordPress.org throws a 500 server error when this is here.
+                               ),
+                       );
+
+                       // Define query filters based on user input.
+                       if ( ! array_key_exists( 'search', $_POST ) ) {
+                               $args['search'] = '';
+                       } else {
+                               $args['search'] = sanitize_text_field( wp_unslash( $_POST['search'] ) );
+                       }
+
+                       if ( ! array_key_exists( 'tags', $_POST ) ) {
+                               $args['tag'] = '';
+                       } else {
+                               $args['tag'] = array_map( 'sanitize_text_field', wp_unslash( (array) $_POST['tags'] ) );
+                       }
+
+                       if ( '' === $args['search'] && '' === $args['tag'] ) {
+                               $args['browse'] = 'new'; // Sort by latest themes by default.
+                       }
+
+                       // Load themes from the .org API.
+                       $themes = themes_api( 'query_themes', $args );
+                       if ( is_wp_error( $themes ) ) {
+                               wp_send_json_error();
+                       }
+
+                       // This list matches the allowed tags in wp-admin/includes/theme-install.php.
+                       $themes_allowedtags = array_fill_keys(
+                               array( 'a', 'abbr', 'acronym', 'code', 'pre', 'em', 'strong', 'div', 'p', 'ul', 'ol', 'li', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'img' ),
+                               array()
+                       );
+                       $themes_allowedtags['a'] = array_fill_keys( array( 'href', 'title', 'target' ), true );
+                       $themes_allowedtags['acronym']['title'] = true;
+                       $themes_allowedtags['abbr']['title'] = true;
+                       $themes_allowedtags['img'] = array_fill_keys( array( 'src', 'class', 'alt' ), true );
+
+                       // Prepare a list of installed themes to check against before the loop.
+                       $installed_themes = array();
+                       $wp_themes = wp_get_themes();
+                       foreach ( $wp_themes as $theme ) {
+                               $installed_themes[] = $theme->get_stylesheet();
+                       }
+                       $update_php = network_admin_url( 'update.php?action=install-theme' );
+
+                       // Set up properties for themes available on WordPress.org.
+                       foreach ( $themes->themes as &$theme ) {
+                               $theme->install_url = add_query_arg( array(
+                                       'theme'    => $theme->slug,
+                                       '_wpnonce' => wp_create_nonce( 'install-theme_' . $theme->slug ),
+                               ), $update_php );
+
+                               $theme->name        = wp_kses( $theme->name, $themes_allowedtags );
+                               $theme->author      = wp_kses( $theme->author, $themes_allowedtags );
+                               $theme->version     = wp_kses( $theme->version, $themes_allowedtags );
+                               $theme->description = wp_kses( $theme->description, $themes_allowedtags );
+                               $theme->tags        = implode( ', ', $theme->tags );
+                               $theme->stars       = wp_star_rating( array(
+                                       'rating' => $theme->rating,
+                                       'type' => 'percent',
+                                       'number' => $theme->num_ratings,
+                                       'echo' => false,
+                               ) );
+                               $theme->num_ratings = number_format_i18n( $theme->num_ratings );
+                               $theme->preview_url = set_url_scheme( $theme->preview_url );
+
+                               // Handle themes that are already installed as installed themes.
+                               if ( in_array( $theme->slug, $installed_themes, true ) ) {
+                                       $theme->type = 'installed';
+                               } else {
+                                       $theme->type = $theme_action;
+                               }
+
+                               // Set active based on customized theme.
+                               $theme->active = ( isset( $_POST['customized_theme'] ) && $_POST['customized_theme'] === $theme->slug );
+
+                               // Map available theme properties to installed theme properties.
+                               $theme->id           = $theme->slug;
+                               $theme->screenshot   = array( $theme->screenshot_url );
+                               $theme->authorAndUri = $theme->author;
+                               $theme->parent       = ( $theme->slug === $theme->template ) ? false : $theme->template; // The .org API does not seem to return the parent in a documented way; however, this check should yield a similar result in most cases.
+                               unset( $theme->slug );
+                               unset( $theme->screenshot_url );
+                               unset( $theme->author );
+                       } // End foreach().
+               } // End if().
+               wp_send_json_success( $themes );
+       }
+
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Callback for validating the header_textcolor value.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * Accepts 'blank', and otherwise uses sanitize_hex_color_no_hash().
</span></span></pre></div>
<a id="trunksrcwpincludescssadminbarcss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/css/admin-bar.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/css/admin-bar.css   2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-includes/css/admin-bar.css     2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -693,6 +693,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> #wpadminbar .screen-reader-text span {
</span><span class="cx" style="display: block; padding: 0 10px">        border: 0;
</span><span class="cx" style="display: block; padding: 0 10px">        clip: rect(1px, 1px, 1px, 1px);
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        -webkit-clip-path: inset(50%);
</ins><span class="cx" style="display: block; padding: 0 10px">         clip-path: inset(50%);
</span><span class="cx" style="display: block; padding: 0 10px">        height: 1px;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: -1px;
</span></span></pre></div>
<a id="trunksrcwpincludescsswpembedtemplatecss"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/css/wp-embed-template.css</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/css/wp-embed-template.css   2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-includes/css/wp-embed-template.css     2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -11,6 +11,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> .screen-reader-text {
</span><span class="cx" style="display: block; padding: 0 10px">        border: 0;
</span><span class="cx" style="display: block; padding: 0 10px">        clip: rect(1px, 1px, 1px, 1px);
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        -webkit-clip-path: inset(50%);
</ins><span class="cx" style="display: block; padding: 0 10px">         clip-path: inset(50%);
</span><span class="cx" style="display: block; padding: 0 10px">        height: 1px;
</span><span class="cx" style="display: block; padding: 0 10px">        margin: -1px;
</span></span></pre></div>
<a id="trunksrcwpincludescustomizeclasswpcustomizethemecontrolphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/customize/class-wp-customize-theme-control.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/customize/class-wp-customize-theme-control.php      2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-includes/customize/class-wp-customize-theme-control.php        2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -57,18 +57,22 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function content_template() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
-               $active_url  = esc_url( remove_query_arg( 'customize_theme', $current_url ) );
-               $preview_url = esc_url( add_query_arg( 'customize_theme', '__THEME__', $current_url ) ); // Token because esc_url() strips curly braces.
-               $preview_url = str_replace( '__THEME__', '{{ data.theme.id }}', $preview_url );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /* translators: %s: theme name */
+               $details_label = sprintf( __( 'Details for theme: %s' ), '{{ data.theme.name }}' );
+               /* translators: %s: theme name */
+               $customize_label = sprintf( __( 'Customize theme: %s' ), '{{ data.theme.name }}' );
+               /* translators: %s: theme name */
+               $preview_label = sprintf( __( 'Live preview theme: %s' ), '{{ data.theme.name }}' );
+               /* translators: %s: theme name */
+               $install_label = sprintf( __( 'Install and preview theme: %s' ), '{{ data.theme.name }}' );
</ins><span class="cx" style="display: block; padding: 0 10px">                 ?>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                <# if ( data.theme.isActiveTheme ) { #>
-                       <div class="theme active" tabindex="0" data-preview-url="<?php echo esc_attr( $active_url ); ?>" aria-describedby="{{ data.theme.id }}-action {{ data.theme.id }}-name">
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         <# if ( data.theme.active ) { #>
+                       <div class="theme active" tabindex="0" aria-describedby="{{ data.section }}-{{ data.theme.id }}-action {{ data.theme.id }}-name">
</ins><span class="cx" style="display: block; padding: 0 10px">                 <# } else { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <div class="theme" tabindex="0" data-preview-url="<?php echo esc_attr( $preview_url ); ?>" aria-describedby="{{ data.theme.id }}-action {{ data.theme.id }}-name">
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <div class="theme" tabindex="0" aria-describedby="{{ data.section }}-{{ data.theme.id }}-action {{ data.theme.id }}-name">
</ins><span class="cx" style="display: block; padding: 0 10px">                 <# } #>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <# if ( data.theme.screenshot[0] ) { #>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <# if ( data.theme.screenshot && data.theme.screenshot[0] ) { #>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <div class="theme-screenshot">
</span><span class="cx" style="display: block; padding: 0 10px">                                        <img data-src="{{ data.theme.screenshot[0] }}" alt="" />
</span><span class="cx" style="display: block; padding: 0 10px">                                </div>
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -76,28 +80,45 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                <div class="theme-screenshot blank"></div>
</span><span class="cx" style="display: block; padding: 0 10px">                        <# } #>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <# if ( data.theme.isActiveTheme ) { #>
-                               <span class="more-details" id="{{ data.theme.id }}-action"><?php _e( 'Customize' ); ?></span>
-                       <# } else { #>
-                               <span class="more-details" id="{{ data.theme.id }}-action"><?php _e( 'Live Preview' ); ?></span>
-                       <# } #>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <span class="more-details theme-details" id="{{ data.section }}-{{ data.theme.id }}-action" aria-label="<?php echo esc_attr( $details_label ); ?>"><?php _e( 'Theme Details' ); ?></span>
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        <div class="theme-author"><?php
</span><span class="cx" style="display: block; padding: 0 10px">                                /* translators: Theme author name */
</span><span class="cx" style="display: block; padding: 0 10px">                                printf( _x( 'By %s', 'theme author' ), '{{ data.theme.author }}' );
</span><span class="cx" style="display: block; padding: 0 10px">                        ?></div>
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        <# if ( data.theme.isActiveTheme ) { #>
-                               <h3 class="theme-name" id="{{ data.theme.id }}-name">
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 <# if ( 'installed' === data.theme.type && data.theme.hasUpdate ) { #>
+                               <div class="update-message notice inline notice-warning notice-alt" data-slug="{{ data.theme.id }}">
+                                       <p>
+                                               <?php
+                                               /* translators: %s is the linked update now button */
+                                               printf( __( 'New version available. %s' ), '<button class="button-link update-theme" type="button">' . __( 'Update now' ) . '</button>' );
+                                               ?>
+                                       </p>
+                               </div>
+                       <# } #>
+
+                       <# if ( data.theme.active ) { #>
+                               <h3 class="theme-name" id="{{ data.section }}-{{ data.theme.id }}-name">
</ins><span class="cx" style="display: block; padding: 0 10px">                                         <?php
</span><span class="cx" style="display: block; padding: 0 10px">                                        /* translators: %s: theme name */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        printf( __( '<span>Active:</span> %s' ), '{{{ data.theme.name }}}' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 printf( __( '<span>Previewing:</span> %s' ), '{{ data.theme.name }}' );
</ins><span class="cx" style="display: block; padding: 0 10px">                                         ?>
</span><span class="cx" style="display: block; padding: 0 10px">                                </h3>
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                <div class="theme-actions">
+                                       <button type="button" class="button button-primary customize-theme" aria-label="<?php echo esc_attr( $customize_label ); ?>"><?php _e( 'Customize' ); ?></button>
+                               </div>
+                               <div class="notice notice-success notice-alt"><p><?php _e( 'Installed' ); ?></p></div>
+                       <# } else if ( 'installed' === data.theme.type ) { #>
+                               <h3 class="theme-name" id="{{ data.section }}-{{ data.theme.id }}-name">{{ data.theme.name }}</h3>
+                               <div class="theme-actions">
+                                       <button type="button" class="button button-primary preview-theme" aria-label="<?php echo esc_attr( $preview_label ); ?>" data-slug="{{ data.theme.id }}"><?php _e( 'Live Preview' ); ?></span>
+                               </div>
+                               <div class="notice notice-success notice-alt"><p><?php _e( 'Installed' ); ?></p></div>
</ins><span class="cx" style="display: block; padding: 0 10px">                         <# } else { #>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                <h3 class="theme-name" id="{{ data.theme.id }}-name">{{{ data.theme.name }}}</h3>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         <h3 class="theme-name" id="{{ data.section }}-{{ data.theme.id }}-name">{{ data.theme.name }}</h3>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <div class="theme-actions">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <button type="button" class="button theme-details"><?php _e( 'Theme Details' ); ?></button>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 <button type="button" class="button button-primary theme-install preview" aria-label="<?php echo esc_attr( $install_label ); ?>" data-slug="{{ data.theme.id }}" data-name="{{ data.theme.name }}"><?php _e( 'Install &amp; Preview' ); ?></button>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 </div>
</span><span class="cx" style="display: block; padding: 0 10px">                        <# } #>
</span><span class="cx" style="display: block; padding: 0 10px">                </div>
</span></span></pre></div>
<a id="trunksrcwpincludescustomizeclasswpcustomizethemespanelphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/customize/class-wp-customize-themes-panel.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/customize/class-wp-customize-themes-panel.php                               (rev 0)
+++ trunk/src/wp-includes/customize/class-wp-customize-themes-panel.php 2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,103 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Customize API: WP_Customize_Themes_Panel class
+ *
+ * @package WordPress
+ * @subpackage Customize
+ * @since 4.9.0
+ */
+
+/**
+ * Customize Themes Panel Class
+ *
+ * @since 4.9.0
+ *
+ * @see WP_Customize_Panel
+ */
+class WP_Customize_Themes_Panel extends WP_Customize_Panel {
+
+       /**
+        * Panel type.
+        *
+        * @since 4.9.0
+        * @var string
+        */
+       public $type = 'themes';
+
+       /**
+        * An Underscore (JS) template for rendering this panel's container.
+        *
+        * The themes panel renders a custom panel heading with the current theme and a switch themes button.
+        *
+        * @see WP_Customize_Panel::print_template()
+        *
+        * @since 4.9.0
+        */
+       protected function render_template() {
+               ?>
+               <li id="accordion-section-{{ data.id }}" class="accordion-section control-panel-themes">
+                       <h3 class="accordion-section-title">
+                               <?php
+                               if ( $this->manager->is_theme_active() ) {
+                                       echo '<span class="customize-action">' . __( 'Active theme' ) . '</span> {{ data.title }}';
+                               } else {
+                                       echo '<span class="customize-action">' . __( 'Previewing theme' ) . '</span> {{ data.title }}';
+                               }
+                               ?>
+
+                               <?php if ( current_user_can( 'switch_themes' ) ) : ?>
+                                       <button type="button" class="button change-theme" aria-label="<?php _e( 'Change theme' ); ?>"><?php _ex( 'Change', 'theme' ); ?></button>
+                               <?php endif; ?>
+                       </h3>
+                       <ul class="accordion-sub-container control-panel-content"></ul>
+               </li>
+               <?php
+       }
+
+       /**
+        * An Underscore (JS) template for this panel's content (but not its container).
+        *
+        * Class variables for this panel class are available in the `data` JS object;
+        * export custom variables by overriding WP_Customize_Panel::json().
+        *
+        * @since 4.9.0
+        *
+        * @see WP_Customize_Panel::print_template()
+        */
+       protected function content_template() {
+               ?>
+               <li class="panel-meta customize-info accordion-section <# if ( ! data.description ) { #> cannot-expand<# } #>">
+                       <button class="customize-panel-back" tabindex="-1" type="button"><span class="screen-reader-text"><?php _e( 'Back' ); ?></span></button>
+                       <div class="accordion-section-title">
+                               <span class="preview-notice">
+                                       <?php
+                                       /* translators: %s: themes panel title in the Customizer */
+                                       echo sprintf( __( 'You are browsing %s' ), '<strong class="panel-title">' . __( 'Themes' ) . '</strong>' ); // Separate strings for consistency with other panels.
+                                       ?>
+                               </span>
+                               <?php if ( current_user_can( 'install_themes' ) && ! is_multisite() ) : ?>
+                                       <# if ( data.description ) { #>
+                                               <button class="customize-help-toggle dashicons dashicons-editor-help" type="button" aria-expanded="false"><span class="screen-reader-text"><?php _e( 'Help' ); ?></span></button>
+                                       <# } #>
+                               <?php endif; ?>
+                       </div>
+                       <?php if ( current_user_can( 'install_themes' ) && ! is_multisite() ) : ?>
+                               <# if ( data.description ) { #>
+                                       <div class="description customize-panel-description">
+                                               {{{ data.description }}}
+                                       </div>
+                               <# } #>
+                       <?php endif; ?>
+               </li>
+               <li id="customize-themes-loading-container">
+                       <span class="customize-loading-text-installing-theme"><?php _e( 'Downloading your new theme&hellip;' ); ?></span>
+                       <span class="customize-loading-text"><?php _e( 'Setting up your live preview. This may take a bit.' ); ?></span>
+               </li><?php // Used as a full-screen overlay transition after clicking to preview a theme. ?>
+               <li class="customize-themes-full-container-container">
+                       <ul class="customize-themes-full-container">
+                               <li class="customize-themes-notifications"></li>
+                       </ul>
+               </li>
+               <?php
+       }
+}
</ins></span></pre></div>
<a id="trunksrcwpincludescustomizeclasswpcustomizethemessectionphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/customize/class-wp-customize-themes-section.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/customize/class-wp-customize-themes-section.php     2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/src/wp-includes/customize/class-wp-customize-themes-section.php       2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -10,7 +10,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Customize Themes Section class.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * A UI container for theme controls, which behaves like a backwards Panel.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * A UI container for theme controls, which are displayed within sections.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -19,7 +19,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> class WP_Customize_Themes_Section extends WP_Customize_Section {
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * Customize section type.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Section type.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.2.0
</span><span class="cx" style="display: block; padding: 0 10px">         * @var string
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -27,59 +27,124 @@
</span><span class="cx" style="display: block; padding: 0 10px">        public $type = 'themes';
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * Render the themes section, which behaves like a panel.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Theme section action.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * @since 4.2.0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Defines the type of themes to load (installed, wporg, etc.).
+        *
+        * @since 4.9.0
+        * @var string
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        protected function render() {
-               $classes = 'accordion-section control-section control-section-' . $this->type;
-               ?>
-               <li id="accordion-section-<?php echo esc_attr( $this->id ); ?>" class="<?php echo esc_attr( $classes ); ?>">
-                       <h3 class="accordion-section-title">
-                               <?php
-                               if ( $this->manager->is_theme_active() ) {
-                                       echo '<span class="customize-action">' . __( 'Active theme' ) . '</span> ' . $this->title;
-                               } else {
-                                       echo '<span class="customize-action">' . __( 'Previewing theme' ) . '</span> ' . $this->title;
-                               }
-                               ?>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public $action = '';
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                <?php if ( count( $this->controls ) > 0 ) : ?>
-                                       <button type="button" class="button change-theme" tabindex="0"><?php _ex( 'Change', 'theme' ); ?></button>
-                               <?php endif; ?>
-                       </h3>
-                       <div class="customize-themes-panel control-panel-content themes-php">
-                               <h3 class="accordion-section-title customize-section-title">
-                                       <button class="customize-section-back" tabindex="0" type="button"><span class="screen-reader-text"><?php _e( 'Back' ); ?></span></button>
-                                       <span class="customize-action"><?php _e( 'Customizing' ); ?></span>
-                                       <?php _e( 'Themes' ); ?>
-                                       <span class="title-count theme-count"><?php echo count( $this->controls ) + 1 /* Active theme */; ?></span>
-                               </h3>
-                               <h3 class="accordion-section-title customize-section-title">
-                                       <?php
-                                       if ( $this->manager->is_theme_active() ) {
-                                               echo '<span class="customize-action">' . __( 'Active theme' ) . '</span> ' . $this->title;
-                                       } else {
-                                               echo '<span class="customize-action">' . __( 'Previewing theme' ) . '</span> ' . $this->title;
-                                       }
-                                       ?>
-                                       <button type="button" class="button customize-theme"><?php _e( 'Customize' ); ?></button>
-                               </h3>
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /**
+        * Get section parameters for JS.
+        *
+        * @since 4.9.0
+        * @return array Exported parameters.
+        */
+       public function json() {
+               $exported = parent::json();
+               $exported['action'] = $this->action;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                return $exported;
+       }
+
+       /**
+        * Render a themes section as a JS template.
+        *
+        * The template is only rendered by PHP once, so all actions are prepared at once on the server side.
+        *
+        * @since 4.9.0
+        */
+       protected function render_template() {
+               ?>
+               <li id="accordion-section-{{ data.id }}" class="theme-section">
+                       <button type="button" class="customize-themes-section-title themes-section-{{ data.id }}">{{ data.title }}</button>
+                       <?php if ( current_user_can( 'install_themes' ) || is_multisite() ) : // @todo: upload support ?>
+                       <?php endif; ?>
+                       <div class="customize-themes-section themes-section-{{ data.id }} control-section-content themes-php">
</ins><span class="cx" style="display: block; padding: 0 10px">                                 <div class="theme-overlay" tabindex="0" role="dialog" aria-label="<?php esc_attr_e( 'Theme Details' ); ?>"></div>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                               <div id="customize-container"></div>
-                               <?php if ( count( $this->controls ) > 4 ) : ?>
-                                       <p><label for="themes-filter">
-                                               <span class="screen-reader-text"><?php _e( 'Search installed themes&hellip;' ); ?></span>
-                                               <input type="text" id="themes-filter" placeholder="<?php esc_attr_e( 'Search installed themes&hellip;' ); ?>" />
-                                       </label></p>
-                               <?php endif; ?>
</del><span class="cx" style="display: block; padding: 0 10px">                                 <div class="theme-browser rendered">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        <ul class="themes accordion-section-content">
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 <div class="customize-preview-header themes-filter-bar">
+                                               <?php $this->filter_bar_content_template(); ?>
+                                       </div>
+                                       <div class="error unexpected-error" style="display: none; "><p><?php _e( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>.' ); ?></p></div>
+                                       <ul class="themes">
</ins><span class="cx" style="display: block; padding: 0 10px">                                         </ul>
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                        <p class="no-themes"><?php _e( 'No themes found. Try a different search.' ); ?></p>
+                                       <p class="no-themes-local">
+                                               <?php
+                                               /* translators: %s is the string, "search WordPress.org themes" */
+                                               printf( __( 'No themes found. Try a different search, or %s.' ),
+                                                       sprintf( '<button type="button" class="button-link search-dotorg-themes">%s</button>', __( 'Search WordPress.org themes' ) )
+                                               );
+                                               ?>
+                                       </p>
+                                       <p class="spinner"></p>
</ins><span class="cx" style="display: block; padding: 0 10px">                                 </div>
</span><span class="cx" style="display: block; padding: 0 10px">                        </div>
</span><span class="cx" style="display: block; padding: 0 10px">                </li>
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-<?php }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         <?php
+       }
+
+       /**
+        * Render the filter bar portion of a themes section as a JS template.
+        *
+        * The template is only rendered by PHP once, so all actions are prepared at once on the server side.
+        * The filter bar container is rendered by @see `render_template()`.
+        *
+        * @since 4.9.0
+        */
+       protected function filter_bar_content_template() {
+               ?>
+               <button type="button" class="button button-primary customize-section-back customize-themes-mobile-back"><?php _e( 'Back to theme sources' ); ?></button>
+               <# if ( 'wporg' === data.action ) { #>
+                       <div class="search-form">
+                               <label class="screen-reader-text" for="wp-filter-search-input"><?php _e( 'Search themes&hellip;' ); ?></label>
+                               <input placeholder="<?php _e( 'Search themes&hellip;' ); ?>" type="search" aria-describedby="live-search-desc" id="wp-filter-search-input" class="wp-filter-search">
+                               <span id="live-search-desc" class="screen-reader-text"><?php _e( 'The search results will be updated as you type.' ); ?></span>
+                       </div>
+                       <button type="button" class="button feature-filter-toggle">
+                               <span class="filter-count-0"><?php _e( 'Filter themes' ); ?></span><span class="filter-count-filters">
+                               <?php
+                               /* translators: %s: number of filters selected. */
+                               printf( __( 'Filter themes (%s)' ), '<span class="theme-filter-count">0</span>' );
+                               ?>
+                               </span>
+                       </button>
+                       <div class="filter-drawer filter-details">
+                               <?php
+                               $feature_list = get_theme_feature_list( false ); // @todo: Use the .org API instead of the local core feature list. The .org API is currently outdated and will be reconciled when the .org themes directory is next redesigned.
+                               foreach ( $feature_list as $feature_name => $features ) {
+                                       echo '<fieldset class="filter-group">';
+                                       echo '<legend>' . esc_html( $feature_name ) . '</legend>';
+                                       echo '<div class="filter-group-feature">';
+                                       foreach ( $features as $feature => $feature_name ) {
+                                               echo '<input type="checkbox" id="filter-id-' . esc_attr( $feature ) . '" value="' . esc_attr( $feature ) . '" /> ';
+                                               echo '<label for="filter-id-' . esc_attr( $feature ) . '">' . esc_html( $feature_name ) . '</label><br>';
+                                       }
+                                       echo '</div>';
+                                       echo '</fieldset>';
+                               }
+                               ?>
+                       </div>
+               <# } else { #>
+                       <p class="themes-filter-container">
+                               <label for="themes-filter">
+                                       <span class="screen-reader-text"><?php _e( 'Search themes&hellip;' ); ?></span>
+                                       <input type="search" id="themes-filter" placeholder="<?php esc_attr_e( 'Search themes&hellip;' ); ?>" aria-describedby="live-search-desc" class="wp-filter-search wp-filter-search-themes" />
+                                       <span id="live-search-desc" class="screen-reader-text"><?php _e( 'The search results will be updated as you type.' ); ?></span>
+                               </label>
+                       </p>
+               <# } #>
+               <div class="filter-themes-count">
+                       <span class="themes-displayed">
+                               <?php
+                               /* translators: %s: number of themes displayed. */
+                               echo sprintf( __( '%s themes' ), '<span class="theme-count">0</span>' );
+                               ?>
+                       </span>
+               </div>
+               <?php
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunittestscustomizemanagerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/customize/manager.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/customize/manager.php   2017-09-29 19:56:33 UTC (rev 41647)
+++ trunk/tests/phpunit/tests/customize/manager.php     2017-09-29 20:12:19 UTC (rev 41648)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2553,7 +2553,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $data = json_decode( $json, true );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertNotEmpty( $data );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $this->assertEqualSets( array( 'theme', 'url', 'browser', 'panels', 'sections', 'nonce', 'autofocus', 'documentTitleTmpl', 'previewableDevices', 'changeset', 'timeouts', 'initialClientTimestamp', 'initialServerDate', 'initialServerTimestamp' ), array_keys( $data ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->assertEqualSets( array( 'theme', 'url', 'browser', 'panels', 'sections', 'nonce', 'autofocus', 'documentTitleTmpl', 'previewableDevices', 'changeset', 'timeouts', 'initialClientTimestamp', 'initialServerDate', 'initialServerTimestamp', 'l10n' ), array_keys( $data ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertEquals( $autofocus, $data['autofocus'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertArrayHasKey( 'save', $data['nonce'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertArrayHasKey( 'preview', $data['nonce'] );
</span></span></pre>
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