92 lines
2.8 KiB
PHP
92 lines
2.8 KiB
PHP
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<?php
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/**
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* GitHub's Gist site supports oEmbed but their oembed provider only
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* returns raw HTML (no styling) and the first little bit of the code.
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*
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* Their JavaScript-based embed method is a lot better, so that's what we're using.
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*/
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wp_embed_register_handler( 'github-gist', '#https?://gist\.github\.com/([a-zA-Z0-9/]+)(\#file\-[a-zA-Z0-9\_\-]+)?#', 'github_gist_embed_handler' );
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add_shortcode( 'gist', 'github_gist_shortcode' );
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/**
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* Handle gist embeds.
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*
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* @since 2.8.0
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*
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* @global WP_Embed $wp_embed
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*
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* @param array $matches Results after parsing the URL using the regex in wp_embed_register_handler().
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* @param array $attr Embed attributes.
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* @param string $url The original URL that was matched by the regex.
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* @param array $rawattr The original unmodified attributes.
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* @return string The embed HTML.
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*/
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function github_gist_embed_handler( $matches, $attr, $url, $rawattr ) {
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// Let the shortcode callback do all the work
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return github_gist_shortcode( $matches, $url );
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}
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/**
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* Callback for gist shortcode.
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*
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* @since 2.8.0
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*
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* @param array $atts Attributes found in the shortcode.
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* @param string $content Content enclosed by the shortcode.
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*
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* @return string The gist HTML.
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*/
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function github_gist_shortcode( $atts, $content = '' ) {
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if ( empty( $atts[0] ) && empty( $content ) ) {
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return '<!-- Missing Gist ID -->';
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}
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$id = ( ! empty( $content ) ) ? $content : $atts[0];
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// Parse a URL
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if ( ! is_numeric( $id ) ) {
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$id = preg_replace( '#https?://gist.github.com/([a-zA-Z0-9]+)#', '$1', $id );
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}
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if ( ! $id ) {
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return '<!-- Invalid Gist ID -->';
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}
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wp_enqueue_script( 'jetpack-gist-embed', plugins_url( 'js/gist.js', __FILE__ ), array( 'jquery' ), false, true );
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if ( false !== strpos( $id, '#file-' ) ) {
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// URL points to a specific file in the gist
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$id = str_replace( '#file-', '.json?file=', $id );
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$id = preg_replace( '/\-(?!.*\-)/', '.', $id );
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} else {
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$file = ( ! empty( $atts['file'] ) ) ? '?file=' . urlencode( $atts['file'] ) : '';
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// URL points to the entire gist
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$id .= ".json$file";
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}
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// inline style to prevent the bottom margin to the embed that themes like TwentyTen, et al., add to tables
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$return = '<style>.gist table { margin-bottom: 0; }</style><div class="gist-oembed" data-gist="' . esc_attr( $id ) . '"></div>';
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if ( isset( $_POST[ 'type' ] ) && 'embed' === $_POST[ 'type' ] &&
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isset( $_POST[ 'action' ] ) && 'parse-embed' === $_POST['action'] ) {
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return github_gist_simple_embed( $id );
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}
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return $return;
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}
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/**
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* Use script tag to load shortcode in editor.
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*
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* @since 3.9.0
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*
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* @param string $id The ID of the gist.
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*
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* @return string
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*/
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function github_gist_simple_embed( $id ) {
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$id = str_replace( 'json', 'js', $id );
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return '<script type="text/javascript" src="https://gist.github.com/' . $id . '"></script>';
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}
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