fixes sample reader toc for inactive elements

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@d-i-t-a/reader",
-  "version": "2.3.13",
+  "version": "2.3.14",
   "description": "A viewer application for EPUB files.",
   "repository": "https://github.com/d-i-t-a/R2D2BC",
   "license": "Apache-2.0",

src/model/Link.ts

@@ -51,7 +51,9 @@ export function convertAndCamel(o) {
         value = o[origKey];
         if (
           value instanceof Array ||
-          (value !== null && value.constructor === Object)
+          (value !== null &&
+            value !== undefined &&
+            value.constructor === Object)
         ) {
           value = convertAndCamel(value);
         }

src/model/Publication.ts

@@ -80,9 +80,9 @@ export class Publication extends R2Publication {
         if (positions?.length > 0) {
           const locator = positions[0];
           let progress = Math.round(
-            locator.locations.totalProgression
+            (locator.locations.totalProgression
               ? locator.locations.totalProgression
-              : 0 * 100
+              : 0) * 100
           );
           if (this.sample?.limit) {
             let valid = progress <= this.sample?.limit;

viewer/index_api.html

@@ -563,6 +563,12 @@
             annotations: {
                 initialAnnotationColor: "var(--RS__highlightColor)",
             },
+            // sample: {
+            //     isSampleRead: true,
+            //     limit: 10, // in percent e.g. 5%
+            //     minimum: 5, // in pages
+            //     popup: "You can borrow the book to continue reading."
+            // },
             protection: {
                 enforceSupportedBrowsers: true,
                 enableEncryption: true, // does nothing right now

viewer/index_dita.html

@@ -755,6 +755,14 @@
             { type: 'style', url: '/viewer/injectables/style/popup.css' },
             { type: 'style', url: '/viewer/injectables/style/popover.css' },
             { type: 'style', url: '/viewer/injectables/style/style.css' },
+            {
+                type: 'script',
+                url: 'https://polyfill.io/v3/polyfill.min.js?features=es6',
+            }, {
+                async: true,
+                type: 'script',
+                url: 'https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js',
+            },
         ]
         let userSettings = {
             // appearance: "readium-sepia-on", //readium-default-on, readium-night-on, readium-sepia-on