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, 69 insertions, 0 deletions

diff --git a/viewer/src/views/item_handlers/PlainTextViewer.vue b/viewer/src/views/item_handlers/PlainTextViewer.vue
new file mode 100644
index 0000000..d386437
--- /dev/null
+++ b/viewer/src/views/item_handlers/PlainTextViewer.vue
@@ -0,0 +1,69 @@
+<!--
+-- 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>
+  <!-- Outer div necessary for the resize handle to appear on Firefox. -->
+  <div
+    :class="$style.content"
+    class="fill"
+  >
+    <pre
+      v-if="isFinished"
+      v-text="data"
+    />
+    <LdLoading v-else />
+  </div>
+</template>
+
+<script setup lang="ts">
+import { PlainTextItem } from '@/@types/gallery';
+import LdLoading from '@/components/LdLoading.vue';
+import { useItemResource } from '@/services/ui/ldItemResourceUrl';
+import { useFetch } from '@vueuse/core';
+import { PropType } from 'vue';
+
+const props = defineProps({
+  item: { type: Object as PropType<PlainTextItem>, required: true },
+});
+
+const { itemResourceUrl } = useItemResource(props.item);
+const { isFinished, data } = useFetch(itemResourceUrl).text();
+</script>
+
+<style lang="scss" module>
+@import "~@/assets/scss/theme";
+
+.content {
+  display: flex;
+  justify-content: center;
+  background: $viewer-text-background;
+  color: $viewer-text;
+
+  > pre {
+    width: 100%;
+    max-width: 100%; // Forbid overflow when resizing.
+    margin: 1em; // Necessary for the resize handle to be selectable on qutebrowser.
+    border: none;
+    white-space: pre-wrap;
+    resize: horizontal; // Allow the user to adjust the width of the text view for easier column reading.
+    overflow: hidden; // Necessary for the resize handle to be shown in Chromium.
+  }
+}
+</style>