1 files changed, 121 insertions, 0 deletions
diff --git a/plugins/jetpack/modules/shortcodes/slideshare.php b/plugins/jetpack/modules/shortcodes/slideshare.php
new file mode 100644
index 00000000..898ae57e
--- /dev/null
+++ b/plugins/jetpack/modules/shortcodes/slideshare.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * Slideshare shortcode format:
+ * Old style (still compatible): [slideshare id=5342235&doc=camprock-101002163655-phpapp01&w=300&h=200]
+ * New style: [slideshare id=5342235&w=300&h=200&fb=0&mw=0&mh=0&sc=no]
+ *
+ * Legend:
+ *	id    = Document ID provided by Slideshare
+ *	w     = Width of iFrame     (int)
+ *	h     = Height of iFrame    (int)
+ *	fb    = iFrame frameborder  (int)
+ *	mw    = iFrame marginwidth  (int)
+ *	mh    = iFrame marginheight (int)
+ *	sc    = iFrame Scrollbar    (yes/no)
+ *	pro   = Slideshare Pro      (yes/no)
+ *	style = Inline CSS          (string)
+ **/
+
+add_shortcode( 'slideshare', 'slideshare_shortcode' );
+
+function slideshare_shortcode( $atts ) {
+	global $content_width;
+
+	$params = shortcode_new_to_old_params( $atts );
+	parse_str( $params, $arguments );
+
+	if ( empty( $arguments ) ) {
+		return '<!-- SlideShare error: no arguments -->';
+	}
+
+	$attr = shortcode_atts(
+		array(
+			'id'    => '',
+			'w'     => '',
+			'h'     => '',
+			'fb'    => '',
+			'mw'    => '',
+			'mh'    => '',
+			'sc'    => '',
+			'pro'   => '',
+			'style' => '',
+		),
+		$arguments
+	);
+
+	// check that the Slideshare ID contains letters, numbers and query strings
+	$pattern = '/[^-_a-zA-Z0-9?=&]/';
+	if ( empty( $attr['id'] ) || preg_match( $pattern, $attr['id'] ) ) {
+		return '<!-- SlideShare error: id is missing or has illegal characters -->';
+	}
+
+	// check the width/height
+	$w = $attr['w'];
+	if ( empty( $w ) && ! empty( $content_width ) ) {
+		$w = intval( $content_width );
+	} elseif ( ! ( $w = intval( $w ) ) || $w < 300 || $w > 1600 ) {
+		$w = 425;
+	} else {
+		$w = intval( $w );
+	}
+
+	$h = ceil( $w * 348 / 425 ); // Note: user-supplied height is ignored.
+
+	if ( isset( $attr['pro'] ) && $attr['pro'] ) {
+		$source = 'https://www.slideshare.net/slidesharepro/' . $attr['id'];
+	} else {
+		$source = 'https://www.slideshare.net/slideshow/embed_code/' . $attr['id'];
+	}
+
+	if ( isset( $rel ) ) {
+		$source = add_query_arg( 'rel', intval( $rel ), $source );
+	}
+
+	if ( isset( $startSlide ) ) {
+		$source = add_query_arg( 'startSlide', intval( $startSlide ), $source );
+	}
+
+	$player = sprintf( "<iframe src='%s' width='%d' height='%d'", esc_url( $source ), $w, $h );
+
+	// check the frameborder
+	if ( ! empty( $attr['fb'] ) || '0' === $attr['fb'] ) {
+		$player .= " frameborder='" . intval( $attr['fb'] ) . "'";
+	}
+
+	// check the margin width; if not empty, cast as int
+	if ( ! empty( $attr['mw'] ) || '0' === $attr['mw'] ) {
+		$player .= " marginwidth='" . intval( $attr['mw'] ) . "'";
+	}
+
+	// check the margin height, if not empty, cast as int
+	if ( ! empty( $attr['mh'] ) || '0' === $attr['mh'] ) {
+		$player .= " marginheight='" . intval( $attr['mh'] ) . "'";
+	}
+
+	if ( ! empty( $attr['style'] ) ) {
+		$player .= " style='" . esc_attr( $attr['style'] ) . "'";
+	}
+
+	// check the scrollbar; cast as a lowercase string for comparison
+	if ( ! empty( $attr['sc'] ) ) {
+		$sc = strtolower( $attr['sc'] );
+
+		if ( in_array( $sc, array( 'yes', 'no' ) ) ) {
+			$player .= " scrolling='" . $sc . "'";
+		}
+	}
+
+	$player .= ' allowfullscreen webkitallowfullscreen mozallowfullscreen></iframe>';
+
+	/**
+	 * Filter the returned SlideShare shortcode.
+	 *
+	 * @module shortcodes
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param string $player The iframe to return.
+	 * @param array  $atts   The attributes specified in the shortcode.
+	 */
+	return apply_filters( 'jetpack_slideshare_shortcode', $player, $atts );
+}