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, 60 insertions, 0 deletions

diff --git a/viewer/src/components/LdInput.vue b/viewer/src/components/LdInput.vue
new file mode 100644
index 0000000..1d737d1
--- /dev/null
+++ b/viewer/src/components/LdInput.vue
@@ -0,0 +1,60 @@
+<!-- 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>
+  <input
+    v-model="model"
+    :class="$style.ldInput"
+  >
+</template>
+
+<script setup lang="ts">
+import { useVModel } from '@vueuse/core';
+
+const props = defineProps({
+  modelValue: { type: String, required: true },
+});
+const emit = defineEmits(['update:modelValue']);
+const model = useVModel(props, 'modelValue', emit);
+</script>
+
+<style lang="scss" module>
+@import "~@/assets/scss/theme";
+
+.ldInput {
+  box-sizing: border-box;
+  width: 100%;
+  padding: 0 6px;
+  font-size: 1.25rem;
+  height: 1.7em;
+  border: none;
+  box-shadow: none;
+  color: $text;
+  background-color: $input-background-color;
+  border: solid 1px $input-background-color;
+  &:focus {
+    outline: none;
+    border-color: $input-focus-box-border-color;
+  }
+  &::placeholder {
+    color: $input-placeholder-color;
+    font-weight: 100;
+  }
+}
+</style>