From 4b5fe07eceba7fb61f9b620dbaab0c0d12cfa1e9 Mon Sep 17 00:00:00 2001
From: Max Mehl <mail@mehl.mx>
Date: Tue, 30 Jan 2024 22:47:35 +0100
Subject: [PATCH] rework CSS and JS

---
 assets/scss/snap-gallery.scss        | 243 ++++++++++++++++-----------
 layouts/shortcodes/snap-gallery.html |  48 +++---
 static/js/snap-gallery.js            |  13 +-
 3 files changed, 169 insertions(+), 135 deletions(-)

diff --git a/assets/scss/snap-gallery.scss b/assets/scss/snap-gallery.scss
index d7443b6..75e2909 100644
--- a/assets/scss/snap-gallery.scss
+++ b/assets/scss/snap-gallery.scss
@@ -18,123 +18,170 @@
   }
 }
 
-/* The Modal (background) */
-.modal {
+.snap-lightbox {
+  /** Default lightbox to hidden */
   display: none;
+
+  /** Position and style */
   position: fixed;
-  z-index: 1;
-  padding-top: 50px;
-  //padding-bottom: 10%;
-  left: 0;
-  top: 0;
+  z-index: 999;
   width: 100%;
-  height: 100%;;
-  overflow: auto;
-  background-color: black;
+  height: 100%;
+  text-align: center;
+  white-space: nowrap;
+  top: 0;
+  left: 0;
+  background: rgba(0, 0, 0, 0.8);
+
+  /* keep lightbox in middle. TODO: hacky, and not realibly in middle */
+  &:before {
+    content: "";
+    display: inline-block;
+    vertical-align: middle;
+    width: 0;
+    /* adjust for white space between pseudo element and next sibling */
+    margin-right: -.25em;
+    /* stretch line height */
+    height: 100%;
+  }
+
 }
 
-/* Modal Content */
-.modal-content {
-  position: relative;
-  background-color: #fefefe;
-  margin: auto;
-  padding: 0;
-  width: 90%;
-  max-width: 1200px;
-  height: calc(100% - 100px);
-}
+// /* Click on the complete background closes the lightbox */
+// /* Exception: arrow in gallery, they have higher z-index */
+// a.snap-lightbox-close {
+//   position: fixed;
+//   z-index: 800;
+//   width: 100%;
+//   height: 100%;
+//   text-align: center;
+//   white-space: nowrap;
+//   top: 0;
+//   left: 0;
+// }
 
-/* The Close Button */
-.close {
-  color: white;
-  position: absolute;
-  top: 10px;
-  right: 25px;
-  font-size: 35px;
-  font-weight: bold;
-}
+/* Container for image */
+.snap-lightbox-inner {
+  display: inline-block;
+  vertical-align: middle;
+  white-space: normal;
+  max-width: 90%;
+  max-height: 80%;
+  height: 100%;
 
-.close:hover,
-.close:focus {
-  color: #999;
-  text-decoration: none;
-  cursor: pointer;
-}
-
-/* Hide the slides by default */
-.snap-slide {
-  display: none;
-
-  max-height: 100%;
+  /* Number text (1/3 etc) */
+  .numbertext {
+    color: #f2f2f2;
+    background-color: #000;
+    font-size: 12px;
+    padding: 8px 12px;
+    position: absolute;
+    top: 10%;
+  }
 
   img {
     max-height: 100%;
   }
 
+  // TODO: Untested
+  p {
+    color: #fff;
+    z-index: 810;
+    position: relative;
+  }
 }
 
-/* Next & previous buttons */
-.prev,
-.next {
-  cursor: pointer;
-  position: absolute;
-  top: 50%;
-  width: auto;
-  padding: 16px;
-  margin-top: -50px;
-  color: white;
-  font-weight: bold;
-  font-size: 20px;
-  transition: 0.6s ease;
-  border-radius: 0 3px 3px 0;
-  user-select: none;
-  -webkit-user-select: none;
-  text-decoration: none !important;
-}
+// /* Caption text */
+// .caption-container {
+//   text-align: center;
+//   background-color: black;
+//   padding: 2px 16px;
+//   color: white;
+// }
 
-/* Position the "next button" to the right */
-.next {
-  right: 0;
-  border-radius: 3px 0 0 3px;
-}
-
-/* On hover, add a black background color with a little bit see-through */
-.prev:hover,
-.next:hover {
-  background-color: rgba(0, 0, 0, 0.8);
-}
-
-/* Number text (1/3 etc) */
-.numbertext {
-  color: #f2f2f2;
-  background-color: #000;
-  font-size: 12px;
-  padding: 8px 12px;
-  position: absolute;
-  top: 0;
-}
-
-/* Caption text */
-.caption-container {
+/* prev/next arrows & close button */
+.snap-lightbox-prev,
+.snap-lightbox-next {
+  position: fixed;
+  z-index: 800;
+  width: 5%;
+  height: 100%;
   text-align: center;
-  background-color: black;
-  padding: 2px 16px;
+  top: 0;
+
+  .snap-lightbox-arrow {
+    display: inline-block;
+    position: fixed;
+    top: 50%;
+    z-index: 900;
+    border: solid #fff;
+    border-width: 0 7px 7px 0;
+    display: inline-block;
+    padding: 1%;
+  }
+
+  &:hover>.snap-lightbox-arrow {
+    border-color: #999;
+    transition: all 0.25s ease;
+  }
+}
+
+.snap-lightbox-prev {
+  left: 0;
+
+  .snap-lightbox-arrow {
+    left: 2%;
+    transform: rotate(135deg);
+    -webkit-transform: rotate(135deg);
+  }
+}
+
+.snap-lightbox-next {
+  right: 0;
+
+  .snap-lightbox-arrow {
+    right: 2%;
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg);
+  }
+}
+
+/* The Close Button */
+.snap-close {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  position: absolute;
+  top: 15px;
+  right: 15px;
+  height: 50px;
+  width: 50px;
   color: white;
+  font-size: 50px;
+  font-weight: bold;
+  z-index: 900;
+
+  &:hover,
+  &:focus {
+    color: #999;
+    text-decoration: none;
+    cursor: pointer;
+  }
 }
 
-img.img-thumb {
-  opacity: 0.6;
-}
+@media screen and (max-width: 767px) {
+  .snap-lightbox-inner {
+    max-width: 80%;
+  }
 
-.img-active,
-.img-thumb:hover {
-  opacity: 1 !important;
-}
+  .snap-lightbox-prev,
+  .snap-lightbox-next {
+    width: 10%;
+  }
 
-img.hover-shadow {
-  transition: 0.3s;
-}
-
-.hover-shadow:hover {
-  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+  .snap-lightbox-close-button {
+    width: 10%;
+    height: calc(10vw);
+    /* ~10% width */
+  }
 }
diff --git a/layouts/shortcodes/snap-gallery.html b/layouts/shortcodes/snap-gallery.html
index 32ae58c..5218e06 100644
--- a/layouts/shortcodes/snap-gallery.html
+++ b/layouts/shortcodes/snap-gallery.html
@@ -2,7 +2,6 @@
 {{- with resources.Get "scss/snap-gallery.scss" | toCSS }}
 <link rel="stylesheet" href="{{ .RelPermalink }}" crossorigin="anonymous">
 {{- end }}
-<script src="/js/snap-gallery.js"></script>
 
 {{/*  Initialise variables  */}}
 {{ $imgs := slice }}
@@ -31,31 +30,26 @@
 </div>
 
 {{/*  The Modal/Lightbox  */}}
-<div id="snap-modal" class="modal">
-  <span class="close cursor" onclick="closeModal()">&times;</span>
-  <div class="modal-content">
-
-    {{ range $i, $img := $imgs }}
-    <div class="snap-slide">
-      <div class="numbertext">{{ add $i 1 }} / {{ len $imgs }}</div>
-      <img src="{{ $img }}" style="width:100%">
-    </div>
-    {{ end }}
-
-    <!-- Next/previous controls -->
-    <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
-    <a class="next" onclick="plusSlides(1)">&#10095;</a>
-
-    <!-- Caption text -->
-    <div class="caption-container">
-      <p id="caption"></p>
-    </div>
-
-    <!-- Thumbnail image controls -->
-    {{/*  {{ range $i, $img := $imgs }}
-    <div class="snap-image">
-      <img class="img-thumb" src="{{ $img }}" onclick="currentSlide({{ add $i 1 }})" alt="Nature">
-    </div>
-    {{ end }}  */}}
+<div class="snap-lightbox">
+  {{ range $i, $img := $imgs }}
+  <div class="snap-lightbox-inner">
+    <div class="numbertext">{{ add $i 1 }} / {{ len $imgs }}</div>
+    <img src="{{ $img }}" style="width:100%">
   </div>
+  {{ end }}
+
+  <!-- Close and Next/previous controls -->
+  <span class="snap-close" onclick="closeModal()">&times;</span>
+
+  <a class="snap-lightbox-prev" onclick="plusSlides(-1)"><i class="snap-lightbox-arrow"></i></a>
+  <a class="snap-lightbox-next" onclick="plusSlides(1)"><i class="snap-lightbox-arrow"></i></a>
+  {{/*  <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
+  <a class="next" onclick="plusSlides(1)">&#10095;</a>  */}}
+
+  {{/*  <!-- Caption text -->
+  <div class="caption-container">
+    <p id="caption"></p>
+  </div>  */}}
 </div>
+
+<script src="/js/snap-gallery.js"></script>
diff --git a/static/js/snap-gallery.js b/static/js/snap-gallery.js
index 678ce66..8c3820e 100644
--- a/static/js/snap-gallery.js
+++ b/static/js/snap-gallery.js
@@ -1,11 +1,11 @@
 // Open the Modal
 function openModal() {
-  document.getElementById("snap-modal").style.display = "block";
+  document.getElementsByClassName("snap-lightbox")[0].style.display = "block";
 }
 
 // Close the Modal
 function closeModal() {
-  document.getElementById("snap-modal").style.display = "none";
+  document.getElementsByClassName("snap-lightbox")[0].style.display = "none";
 }
 
 var slideIndex = 1;
@@ -23,18 +23,11 @@ function currentSlide(n) {
 
 function showSlides(n) {
   var i;
-  var slides = document.getElementsByClassName("snap-slide");
-  var dots = document.getElementsByClassName("img-thumb");
-  var captionText = document.getElementById("caption");
+  var slides = document.getElementsByClassName("snap-lightbox-inner");
   if (n > slides.length) { slideIndex = 1 }
   if (n < 1) { slideIndex = slides.length }
   for (i = 0; i < slides.length; i++) {
     slides[i].style.display = "none";
   }
-  for (i = 0; i < dots.length; i++) {
-    dots[i].className = dots[i].className.replace(" img-active", "");
-  }
   slides[slideIndex - 1].style.display = "inline-block";
-  dots[slideIndex - 1].className += " img-active";
-  captionText.innerHTML = dots[slideIndex - 1].alt;
 }