1 files changed, 116 insertions, 0 deletions
diff --git a/plugins/jetpack/modules/theme-tools/site-logo/inc/functions.php b/plugins/jetpack/modules/theme-tools/site-logo/inc/functions.php
new file mode 100644
index 00000000..23a8f23e
--- /dev/null
+++ b/plugins/jetpack/modules/theme-tools/site-logo/inc/functions.php
@@ -0,0 +1,116 @@
+<?php
+/**
+ * Functions and template tags for using site logos.
+ *
+ * @package Jetpack
+ */
+
+/**
+ * Retrieve the site logo URL or ID (URL by default). Pass in the string 'id' for ID.
+ *
+ * @uses get_option()
+ * @uses esc_url_raw()
+ * @uses set_url_scheme()
+ * @return mixed The URL or ID of our site logo, false if not set
+ * @since 1.0
+ */
+function jetpack_get_site_logo( $show = 'url' ) {
+	$logo = site_logo()->logo;
+
+	// Return false if no logo is set
+	if ( ! isset( $logo['id'] ) || 0 == $logo['id'] ) {
+		return false;
+	}
+
+	// Return the ID if specified, otherwise return the URL by default
+	if ( 'id' == $show ) {
+		return $logo['id'];
+	} else {
+		return esc_url_raw( set_url_scheme( $logo['url'] ) );
+	}
+}
+
+/**
+ * Determine if a site logo is assigned or not.
+ *
+ * @uses get_option
+ * @return boolean True if there is an active logo, false otherwise
+ */
+function jetpack_has_site_logo() {
+	return site_logo()->has_site_logo();
+}
+
+/**
+ * Output an <img> tag of the site logo, at the size specified
+ * in the theme's add_theme_support() declaration.
+ *
+ * @uses Site_Logo::logo
+ * @uses Site_Logo::theme_size()
+ * @uses jetpack_has_site_logo()
+ * @uses jetpack_is_customize_preview()
+ * @uses esc_url()
+ * @uses home_url()
+ * @uses esc_attr()
+ * @uses wp_get_attachment_image()
+ * @uses apply_filters()
+ * @since 1.0
+ */
+function jetpack_the_site_logo() {
+	$logo = site_logo()->logo;
+	$size = site_logo()->theme_size();
+	$html = '';
+
+	// If no logo is set, but we're in the Customizer, leave a placeholder (needed for the live preview).
+	if ( ! jetpack_has_site_logo() ) {
+		if ( jetpack_is_customize_preview() ) {
+			$html = sprintf( '<a href="%1$s" class="site-logo-link" style="display:none;"><img class="site-logo" data-size="%2$s" /></a>',
+				esc_url( home_url( '/' ) ),
+				esc_attr( $size )
+			);
+		}
+	}
+
+	// We have a logo. Logo is go.
+	else {
+		$html = sprintf( '<a href="%1$s" class="site-logo-link" rel="home" itemprop="url">%2$s</a>',
+			esc_url( home_url( '/' ) ),
+			wp_get_attachment_image(
+				$logo['id'],
+				$size,
+				false,
+				array(
+					'class'     => "site-logo attachment-$size",
+					'data-size' => $size,
+					'itemprop'  => "logo"
+				)
+			)
+		);
+	}
+
+	echo apply_filters( 'jetpack_the_site_logo', $html, $logo, $size );
+}
+
+/**
+ * Whether the site is being previewed in the Customizer.
+ * Duplicate of core function until 4.0 is released.
+ *
+ * @global WP_Customize_Manager $wp_customize Customizer instance.
+ * @return bool True if the site is being previewed in the Customizer, false otherwise.
+ */
+function jetpack_is_customize_preview() {
+	global $wp_customize;
+
+	return is_a( $wp_customize, 'WP_Customize_Manager' ) && $wp_customize->is_preview();
+}
+
+/**
+ * Sanitize the string of classes used for header text.
+ * Limit to A-Z,a-z,0-9,(space),(comma),_,-
+ *
+ * @return string Sanitized string of CSS classes.
+ */
+function jetpack_sanitize_header_text_classes( $classes ) {
+	$classes = preg_replace( '/[^A-Za-z0-9\,\ ._-]/', '', $classes );
+
+	return $classes;
+}