Ticket #31281: 0002-31281-patch-WP-Dependency-access-for-JS-templates.patch

wp-includes/functions.wp-scripts.php

@@ -293 +293 @@
         global $wp_scripts;
         return $wp_scripts->add_data( $handle, $key, $value );
 }
+
+
+add_filter( 'script_loader_tag', 'wp_script_template_filter', 10, 3 );
+/**
+ * Allow registering JavaScript/Underscore templates as script/WP_Dependency.
+ *
+ * The default file extension for JS templates is `.tmpl`.
+ * If you use a custom extension, add it using the `allowed_js_template_extensions` filter.
+ *
+ * Note: Creating a new node is 25% faster
+ * $tag->appendChild( $dom->createTextNode( file_get_contents( $src ) ) );
+ * than setting the node value
+ * $tag->nodeValue = esc_html( file_get_contents( $src ) );
+ * @link @link http://chat.stackexchange.com/transcript/message/19567599#19567599
+ *
+ * @since 4.2.0
+ *
+ * @param string $html
+ * @param string $handle
+ * @param string $src
+ * @return string
+ */
+function wp_script_template_filter( $html, $handle, $src ) {
+        if ( empty( $src ) )
+                return $html;
+
+        $file = wp_check_filetype( $src );
+
+        if ( ! isset( $file['ext'] ) )
+                return $html;
+
+        if ( ! in_array(
+                $file['ext'],
+                apply_filters( 'allowed_js_template_extensions', array( 'tmpl', ) )
+        ) )
+                return $html;
+
+        $dom = new DOMDocument;
+        $dom->loadHTML( $html );
+
+        /** @var DOMElement $tag */
+        foreach ( $dom->getElementsByTagName( 'script' ) as $tag ) {
+                if ( $tag->hasAttribute( 'type' ) ) {
+                        $tag->setAttribute( 'type', 'text/template' );
+                        $tag->setAttribute( 'id', $handle );
+                        $tag->appendChild( $dom->createTextNode( file_get_contents( $src ) ) );
+                        $tag->removeAttribute( 'src' );
+                        $html = $dom->saveHTML( $tag );
+                }
+        }
+
+        return $html;
+}