1 files changed, 37 insertions, 0 deletions
diff --git a/plugins/jetpack/modules/shortcodes/gist.php b/plugins/jetpack/modules/shortcodes/gist.php
new file mode 100644
index 00000000..9a8f63db
--- /dev/null
+++ b/plugins/jetpack/modules/shortcodes/gist.php
@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * GitHub's Gist site supports oEmbed but their oembed provider only
+ * returns raw HTML (no styling) and the first little bit of the code.
+ *
+ * Their Javascript-based embed method is a lot better, so that's what we're using.
+ */
+wp_embed_register_handler( 'github-gist', '#https?://gist\.github\.com/([a-zA-Z0-9]+)#', 'github_gist_embed_handler' );
+add_shortcode( 'gist', 'github_gist_shortcode' );
+
+function github_gist_embed_handler( $matches, $attr, $url, $rawattr ) {
+	// Let the shortcode callback do all the work
+	return github_gist_shortcode( $attr, $url );
+}
+
+function github_gist_shortcode( $atts, $content = '' ) {
+
+	if ( empty( $atts[0] ) && empty( $content ) )
+		return '<!-- Missing Gist ID -->';
+
+	$id = ( ! empty( $content ) ) ? $content : $atts[0];
+
+	// Parse a URL
+	if ( ! is_numeric( $id ) )
+		$id = preg_replace( '#https?://gist.github.com/([a-zA-Z0-9]+)#', '$1', $id );
+
+	if ( ! $id )
+		return '<!-- Invalid Gist ID -->';
+
+	$embed_url = "https://gist.github.com/{$id}.js";
+
+	if ( ! empty( $atts['file'] ) )
+		$embed_url = add_query_arg( 'file', urlencode( $atts['file'] ), $embed_url );
+	// inline style to prevent the bottom margin to the embed that themes like TwentyTen, et al., add to tables
+	return '<style>.gist table { margin-bottom: 0; }</style>' . '<script src="' . esc_url( $embed_url ) . '"></script>';
+}
+\ No newline at end of file