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, 74 insertions, 0 deletions

diff --git a/viewer/src/views/layout/left/LayoutTagList.vue b/viewer/src/views/layout/left/LayoutTagList.vue
new file mode 100644
index 0000000..670e6c3
--- /dev/null
+++ b/viewer/src/views/layout/left/LayoutTagList.vue
@@ -0,0 +1,74 @@
+<!-- ldgallery - A static generator which turns a collection of tagged
+--             pictures into a searchable web gallery.
+--
+-- Copyright (C) 2019-2022  Guillaume FOUET
+--
+-- 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>
+  <div
+    v-show="model.length"
+    class="flex"
+    :class="$style.tag"
+  >
+    <TransitionGroup name="move">
+      <div
+        v-for="tag in model"
+        :key="tag.tagfiltered"
+        :title="t('panelLeft.taglist.activetag.title')"
+        @click="remove(tag)"
+        v-text="tag.display"
+      />
+    </TransitionGroup>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { TagSearch } from '@/@types/tag';
+import { useVModel } from '@vueuse/core';
+import { useI18n } from 'vue-i18n';
+
+const props = defineProps({
+  modelValue: { type: Array<TagSearch>, required: true },
+});
+const emit = defineEmits(['update:modelValue']);
+const model = useVModel(props, 'modelValue', emit);
+
+const { t } = useI18n();
+
+function remove(toRemove: TagSearch) {
+  model.value = model.value.filter(tag => tag !== toRemove);
+}
+</script>
+
+<style lang="scss" module>
+@import "~@/assets/scss/theme";
+
+.tag {
+  flex-wrap: wrap;
+  justify-content: flex-start;
+  gap: 2px;
+  padding: 4px;
+  background-color: $input-background-color;
+  > div {
+    color: $text-light;
+    background-color: $tag-background-color;
+    padding: 0 8px 3px;
+    text-overflow: ellipsis;
+    overflow: hidden;
+    cursor: pointer;
+  }
+}
+</style>