Channels: Add support for multi-image community posts (#4412)

This PR adds a CSS-only image carousel for community posts with more than
one image attached.

Closes issue 3522

1 files changed, 119 insertions, 0 deletions

diff --git a/assets/css/carousel.css b/assets/css/carousel.css
new file mode 100644
index 00000000..4bae92e5
--- /dev/null
+++ b/assets/css/carousel.css
@@ -0,0 +1,119 @@
+/*
+Copyright (c) 2024 by Jennifer (https://codepen.io/jwjertzoch/pen/JjyGeRy)
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify,
+merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall
+be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+.carousel {
+    margin: 0 auto;
+    overflow: hidden;
+    text-align: center;
+}
+
+.slides {
+    width: 100%;
+    display: flex;
+    overflow-x: scroll;
+    scrollbar-width: none;
+    scroll-snap-type: x mandatory;
+    scroll-behavior: smooth;
+}
+
+.slides::-webkit-scrollbar {
+    display: none;
+}
+
+.slides-item {
+    align-items: center;
+    border-radius: 10px;
+    display: flex;
+    flex-shrink: 0;
+    font-size: 100px;
+    height: 600px;
+    justify-content: center;
+    margin: 0 1rem;
+    position: relative;
+    scroll-snap-align: start;
+    transform: scale(1);
+    transform-origin: center center;
+    transition: transform .5s;
+    width: 100%;
+}
+
+.carousel__nav {
+    padding: 1.25rem .5rem;
+}
+
+.slider-nav {
+    align-items: center;
+    background-color: #ddd;
+    border-radius: 50%;
+    color: #000;
+    display: inline-flex;
+    height: 1.5rem;
+    justify-content: center;
+    padding: .5rem;
+    position: relative;
+    text-decoration: none;
+    width: 1.5rem;
+}
+
+.skip-link {
+    height: 1px;
+    overflow: hidden;
+    position: absolute;
+    top: auto;
+    width: 1px;
+}
+
+.skip-link:focus {
+    align-items: center;
+    background-color: #000;
+    color: #fff;
+    display: flex;
+    font-size: 30px;
+    height: 30px;
+    justify-content: center;
+    opacity: .8;
+    text-decoration: none;
+    width: 50%;
+    z-index: 1;
+}
+
+.light-theme .slider-nav {
+    background-color: #ddd;
+}
+
+.dark-theme .slider-nav  {
+    background-color: #0005;
+}
+
+@media (prefers-color-scheme: light) {
+    .no-theme .slider-nav {
+        background-color: #ddd;
+    }
+}
+
+@media (prefers-color-scheme: dark) {
+    .no-theme .slider-nav {
+        background-color: #0005;
+    }
+}