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<?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/]+)(\#file\-[a-zA-Z0-9\_\-]+)?#', 'github_gist_embed_handler' );
add_shortcode( 'gist', 'github_gist_shortcode' );
/**
* Handle gist embeds.
*
* @since 2.8.0
*
* @global WP_Embed $wp_embed
*
* @param array $matches Results after parsing the URL using the regex in wp_embed_register_handler().
* @param array $attr Embed attributes.
* @param string $url The original URL that was matched by the regex.
* @param array $rawattr The original unmodified attributes.
* @return string The embed HTML.
*/
function github_gist_embed_handler( $matches, $attr, $url, $rawattr ) {
// Let the shortcode callback do all the work
return github_gist_shortcode( $matches, $url );
}
/**
* Callback for gist shortcode.
*
* @since 2.8.0
*
* @param array $atts Attributes found in the shortcode.
* @param string $content Content enclosed by the shortcode.
*
* @return string The gist HTML.
*/
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 -->';
}
wp_enqueue_script( 'jetpack-gist-embed', plugins_url( 'js/gist.js', __FILE__ ), array( 'jquery' ), false, true );
if ( false !== strpos( $id, '#file-' ) ) {
// URL points to a specific file in the gist
$id = str_replace( '#file-', '.json?file=', $id );
$id = preg_replace( '/\-(?!.*\-)/', '.', $id );
} else {
$file = ( ! empty( $atts['file'] ) ) ? '?file=' . urlencode( $atts['file'] ) : '';
// URL points to the entire gist
$id .= ".json$file";
}
// 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><div class="gist-oembed" data-gist="' . esc_attr( $id ) . '"></div>';
if ( isset( $_POST[ 'type' ] ) && 'embed' === $_POST[ 'type' ] &&
isset( $_POST[ 'action' ] ) && 'parse-embed' === $_POST['action'] ) {
return github_gist_simple_embed( $id );
}
return $return;
}
/**
* Use script tag to load shortcode in editor.
*
* @since 3.9.0
*
* @param string $id The ID of the gist.
*
* @return string
*/
function github_gist_simple_embed( $id ) {
$id = str_replace( 'json', 'js', $id );
return '<script type="text/javascript" src="https://gist.github.com/' . $id . '"></script>';
}
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GitWeb