fix, wip: don't show preview for non-image fragments

webui/src/components/display/blobs/FragmentViewer.svelte

@@ -12,8 +12,13 @@
 
   $: objectAddress = String($entity?.get("ANNOTATES") || "");
 
+  $: imageFragment = ["x=", "y=", "w=", "h="].every((q) =>
+    String($entity?.get("W3C_FRAGMENT_SELECTOR")).includes(q)
+  );
+
   let imageLoaded = false;
   $: imageLoaded && dispatch("loaded");
+  $: if ($entity && !imageFragment) imageLoaded = true;
 </script>
 
 <div class="fragment-viewer">
@@ -21,17 +26,19 @@
     <Spinner />
   {/if}
   {#if $entity}
-    <img
-      class="preview-image"
-      class:imageLoaded
-      src="{API_URL}/{detail ? 'raw' : 'thumb'}/{objectAddress}#{$entity?.get(
-        'W3C_FRAGMENT_SELECTOR'
-      )}"
-      use:xywh
-      alt={address}
-      on:load={() => (imageLoaded = true)}
-      draggable="false"
-    />
+    {#if imageFragment}
+      <img
+        class="preview-image"
+        class:imageLoaded
+        src="{API_URL}/{detail ? 'raw' : 'thumb'}/{objectAddress}#{$entity?.get(
+          'W3C_FRAGMENT_SELECTOR'
+        )}"
+        use:xywh
+        alt={address}
+        on:load={() => (imageLoaded = true)}
+        draggable="false"
+      />
+    {/if}
   {/if}
 </div>