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, 51 deletions

diff --git a/viewer/src/services/dragscrollclickfix.ts b/viewer/src/services/dragscrollclickfix.ts
deleted file mode 100644
index 7125510..0000000
--- a/viewer/src/services/dragscrollclickfix.ts
+++ /dev/null
@@ -1,51 +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/>.
-*/
-
-// https://github.com/donmbelembe/vue-dragscroll/issues/61
-export default class DragScrollClickFix {
-  readonly DRAG_DELAY = 250; // This is the minimal delay to consider a click to be a drag, mostly usefull for touch devices
-
-  timer: NodeJS.Timeout | null = null;
-  dragging: boolean = false;
-
-  onDragScrollStart() {
-    this.timer = setTimeout(() => this.onTimer(), this.DRAG_DELAY);
-  }
-
-  onTimer() {
-    this.timer = null;
-    this.dragging = true;
-  }
-
-  onDragScrollEnd() {
-    if (this.timer) {
-      clearTimeout(this.timer);
-      this.timer = null;
-    }
-    setTimeout(() => (this.dragging = false));
-  }
-
-  onClickCapture(e: MouseEvent) {
-    if (this.dragging) {
-      this.dragging = false;
-      e.preventDefault();
-      e.stopPropagation();
-    }
-  }
-}