viewer: migrate to vue 3, general refactoring and cleanup

Non-exhaustive list of fixes and improvements done at the same time:

- html default background to grey (avoids white flash during init)
- unified links behavior
- added more theme variables
- removed the flex-expand transition (it wasn't working) and replaced it
  with a slide
- fixed LdLoading not centered on the content
- title on removable tags
- fixed an issue with encoded URI from vue-router
- unified Item resource URLs
- removed the iframe for PlainTextViewer (it wasn't working properly)
  and replaced it with a pre
- fixed clear and search buttons tabindex
- fixed the information panel bumping up during the fade animation of
  tag's dropdown
- fixed some focus outlines not appearing correctly
- moved CSS variables to the :root context
- Code cleaning

GitHub: closes #217
GitHub: closes #300
GitHub: closes #297
GitHub: closes #105
GitHub: closes #267
GitHub: closes #275
GitHub: closes #228
GitHub: closes #215
GitHub: closes #112

1 files changed, 15 insertions, 0 deletions

diff --git a/viewer/src/services/ui/ldItemResourceUrl.ts b/viewer/src/services/ui/ldItemResourceUrl.ts
new file mode 100644
index 0000000..7db7ab9
--- /dev/null
+++ b/viewer/src/services/ui/ldItemResourceUrl.ts
@@ -0,0 +1,15 @@
+import { Item } from '@/@types/gallery';
+import { useGalleryStore } from '@/store/galleryStore';
+import { computed } from 'vue';
+import { isDownloadableItem } from '../itemGuards';
+
+export const useItemResource = (item: Item) => {
+  const galleryStore = useGalleryStore();
+  const itemResourceUrl = computed(() => isDownloadableItem(item) ? galleryStore.resourceRoot + item.properties.resource : '');
+  const thumbnailResourceUrl = computed(() => item.thumbnail ? galleryStore.resourceRoot + item.thumbnail.resource : '');
+
+  return {
+    itemResourceUrl,
+    thumbnailResourceUrl,
+  };
+};