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, 0 insertions, 44 deletions

diff --git a/viewer/src/components/item_handlers/LdPdfViewer.vue b/viewer/src/components/item_handlers/LdPdfViewer.vue
deleted file mode 100644
index 04cba0c..0000000
--- a/viewer/src/components/item_handlers/LdPdfViewer.vue
+++ /dev/null
@@ -1,44 +0,0 @@
-<!--
--- ldgallery - A static generator which turns a collection of tagged
---             pictures into a searchable web gallery.
---
--- Copyright (C) 2020  Pacien TRAN-GIRARD
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU Affero General Public License as
--- published by the Free Software Foundation, either version 3 of the
--- License, or (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU Affero General Public License for more details.
---
--- You should have received a copy of the GNU Affero General Public License
--- along with this program.  If not, see <https://www.gnu.org/licenses/>.
--->
-
-<template>
-  <!-- intermediate container necessary to eliminate the double scrollbar -->
-  <div class="fill no-scroll">
-    <!-- prefer native browser PDF viewer if available -->
-    <object class="fill" :data="itemResourceUrl" type="application/pdf">
-      <!-- TODO: fallback to PDF.js (https://github.com/pacien/ldgallery/issues/212) -->
-      <ld-download-viewer :item="item" />
-    </object>
-  </div>
-</template>
-
-<script lang="ts">
-import { PDFItem } from "@/@types/gallery";
-import { Component, Prop, Vue } from "vue-property-decorator";
-
-@Component
-export default class LdPdfViewer extends Vue {
-  @Prop({ required: true }) readonly item!: PDFItem;
-
-  get itemResourceUrl(): string {
-    return this.$galleryStore.resourceRoot + this.item.properties.resource;
-  }
-}
-</script>