Add upstream

wp-content/plugins/jetpack/modules/theme-tools/site-logo.php

@@ -0,0 +1,46 @@
+<?php
+/*
+ * Site Logo.
+ * @see http://jetpack.com/support/site-logo/
+ *
+ * This feature will only be activated for themes that declare their support.
+ * This can be done by adding code similar to the following during the
+ * 'after_setup_theme' action:
+ *
+ * $args = array(
+ * 	'header-text' => array(
+ * 		'site-title',
+ * 		'site-description',
+ * 	),
+ * 	'size' => 'medium',
+ * );
+ * add_theme_support( 'site-logo', $args );
+ *
+ */
+
+/**
+ * Activate the Site Logo plugin.
+ *
+ * @uses current_theme_supports()
+ * @since 3.2
+ */
+function site_logo_init() {
+	// For transferring existing site logo from Jetpack -> Core
+	if ( current_theme_supports( 'custom-logo' ) && ! get_theme_mod( 'custom_logo' ) && $jp_logo = get_option( 'site_logo' ) ) {
+		set_theme_mod( 'custom_logo', $jp_logo['id'] );
+		delete_option( 'site_logo' );
+	}
+
+	// Only load our code if our theme declares support, and the standalone plugin is not activated.
+	if ( current_theme_supports( 'site-logo' ) && ! class_exists( 'Site_Logo', false ) ) {
+		// Load our class for namespacing.
+		require dirname( __FILE__ ) . '/site-logo/inc/class-site-logo.php';
+
+		// Load template tags.
+		require dirname( __FILE__ ) . '/site-logo/inc/functions.php';
+
+		// Load backwards-compatible template tags.
+		require dirname( __FILE__ ) . '/site-logo/inc/compat.php';
+	}
+}
+add_action( 'init', 'site_logo_init' );