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, 128 deletions

diff --git a/viewer/src/components/item_handlers/LdPictureViewer.vue b/viewer/src/components/item_handlers/LdPictureViewer.vue
deleted file mode 100644
index 003ffe9..0000000
--- a/viewer/src/components/item_handlers/LdPictureViewer.vue
+++ /dev/null
@@ -1,128 +0,0 @@
-<!-- ldgallery - A static generator which turns a collection of tagged
---             pictures into a searchable web gallery.
---
--- Copyright (C) 2019-2020  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>
-  <!-- FIXME: v-dragscroll interferes with pinch-to-zoom -->
-  <div
-    ref="containerElement"
-    v-dragscroll
-    class="scrollbar ld-picture-container"
-    @click.capture="e => dragScrollClickFix.onClickCapture(e)"
-    @dblclick="$uiStore.toggleFullscreen()"
-    @dragstart.prevent
-    @dragscrollstart="dragScrollClickFix.onDragScrollStart()"
-    @dragscrollend="dragScrollClickFix.onDragScrollEnd()"
-  >
-    <v-lazy-image
-      ref="imageElement"
-      :src="pictureSrc(item.properties.resource)"
-      class="ld-picture-element"
-      :class="{ 'slow-loading': Boolean(slowLoadingStyle) }"
-      :style="slowLoadingStyle"
-      @load="clearSlowLoading"
-    />
-    <b-loading :active="loader" :is-full-page="false" class="ld-picture-loader" />
-  </div>
-</template>
-
-<script lang="ts">
-import { PictureItem } from "@/@types/gallery";
-import DragScrollClickFix from "@/services/dragscrollclickfix";
-import LdZoom from "@/services/ldzoom";
-import { Component, Prop, Ref, Vue } from "vue-property-decorator";
-
-@Component
-export default class LdPictureViewer extends Vue {
-  @Prop({ required: true }) readonly item!: PictureItem;
-  @Ref() readonly containerElement!: HTMLDivElement;
-  @Ref() readonly imageElement!: Vue;
-
-  readonly SLOW_LOADING_TIMEOUT_MS: number = 1500;
-  readonly dragScrollClickFix = new DragScrollClickFix();
-
-  slowLoadingStyle: string | null = null;
-  loader: boolean = false;
-  timer: NodeJS.Timeout | null = null;
-
-  mounted() {
-    this.timer = setTimeout(this.generateSlowLoadingStyle, this.SLOW_LOADING_TIMEOUT_MS);
-    new LdZoom(
-      this.containerElement,
-      this.imageElement.$el as HTMLImageElement,
-      this.item.properties,
-      10,
-      1 / 5
-    ).install();
-  }
-
-  destroyed() {
-    this.clearSlowLoading();
-  }
-
-  clearSlowLoading() {
-    if (this.timer) clearTimeout(this.timer);
-    this.timer = null;
-    this.slowLoadingStyle = null;
-    this.loader = false;
-  }
-
-  pictureSrc(resource: string) {
-    return this.$galleryStore.resourceRoot + resource;
-  }
-
-  generateSlowLoadingStyle() {
-    this.clearSlowLoading();
-    this.loader = true;
-    if (this.item.thumbnail) {
-      const url = this.pictureSrc(this.item.thumbnail.resource);
-      this.slowLoadingStyle = `background-image: url('${url}');`;
-    }
-  }
-}
-</script>
-
-<style lang="scss">
-@import "~@/assets/scss/theme.scss";
-
-.ld-picture-container {
-  height: 100%;
-}
-
-.ld-picture-element {
-  max-width: unset;
-  max-height: unset;
-  cursor: grab;
-}
-
-.slow-loading {
-  background-repeat: no-repeat;
-  background-position: center;
-  background-size: contain;
-  background-color: $content-bgcolor;
-  background-blend-mode: soft-light;
-  opacity: 1 !important;
-}
-
-.ld-picture-loader {
-  position: relative;
-  & .loading-background {
-    background: none !important;
-  }
-}
-</style>