annotation spaces

js/fix-annotation-spaces.js

@@ -1,19 +1,30 @@
-(function (Drupal, once) {
-  Drupal.behaviors.fixMiradorAnnotationSpaces = {
-    attach: function (context, settings) {
-      // Find all Mirador annotation HTML content wrappers
-      const annotationElements = once(
-        "fix-annotation-spaces",
-        ".mirador-third-party-html",
-        context
-      );
+(function () {
+  // Guard against running multiple observers if the script is loaded more than once
+  if (window.__miradorSpaceFixInitialized) return;
+  window.__miradorSpaceFixInitialized = true;
 
-      annotationElements.forEach((el) => {
-        // Replace both the literal ' ' string and the non-breaking space character (\u00A0)
+  const observer = new MutationObserver((mutations) => {
+    // Target any third-party HTML content blocks in Mirador that haven't been cleaned yet
+    const elements = document.querySelectorAll(
+      ".mirador-third-party-html:not([data-fixed])"
+    );
+
+    if (elements.length > 0) {
+      elements.forEach((el) => {
+        // Swap non-breaking spaces for normal breakable spaces
         el.innerHTML = el.innerHTML
           .replace(/ /g, " ")
           .replace(/\u00A0/g, " ");
+
+        // Mark element so we don't re-process it on subsequent mutations
+        el.setAttribute("data-fixed", "true");
       });
-    },
-  };
-})(Drupal, once);
+    }
+  });
+
+  // Start observing the document body for dynamically added Mirador elements
+  observer.observe(document.body, {
+    childList: true,
+    subtree: true,
+  });
+})();