first commit

h5p-core-fonts-fix.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Plugin Name: H5P core fonts fix
+ * Description: Re-adds styles/h5p-fonts.css to H5PCore::$styles, which Pressbooks' vendored h5p-core 1.27 omits.
+ *
+ * Pressbooks pins h5p/h5p-core 1.27.0 and requires it eagerly through Composer's
+ * autoload_files.php, so it defines H5PCore before the H5P plugin's lazy autoloader
+ * (h5p/autoloader.php) ever gets a chance to. H5PCore::$styles is therefore always the
+ * 1.27 list, while H5P_Plugin::add_core_assets() resolves those filenames against the
+ * H5P plugin's own h5p-php-library (1.28+), where the icon @font-face was moved out of
+ * h5p.css into h5p-fonts.css.
+ *
+ * Net effect: h5p-fonts.css never makes it into H5PIntegration.core.styles, so the
+ * document.write()n content iframe has no 'h5p' icon font and the action bar renders
+ * Reuse/Embed/Rights of use with tofu boxes instead of icons (and the H5P logo link,
+ * being icon-only, disappears entirely).
+ *
+ * Remove this once Pressbooks' vendored h5p-core catches up with the H5P plugin's
+ * h5p-php-library.
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+add_action( 'plugins_loaded', function () {
+	if ( ! class_exists( 'H5PCore' ) ) {
+		return;
+	}
+
+	// add_core_assets() resolves these against plugins_url('h5p/h5p-php-library').
+	$library_dir = WP_PLUGIN_DIR . '/h5p/h5p-php-library/';
+
+	$missing = [];
+	foreach ( [ 'styles/h5p-fonts.css' ] as $style ) {
+		if ( ! in_array( $style, H5PCore::$styles, true ) && file_exists( $library_dir . $style ) ) {
+			$missing[] = $style;
+		}
+	}
+
+	if ( $missing ) {
+		// Prepend, mirroring upstream ordering.
+		H5PCore::$styles = array_merge( $missing, H5PCore::$styles );
+	}
+}, 100 );