if only one item in gallery, remove navigation (#705)

Co-authored-by: Viktor Gustafsson <vgustafsson@planview.com>

Author: drRedflint

src/layout/css/style.scss

@@ -156,6 +156,9 @@ div.media {
   overflow: hidden;
   height: 200px;
 }
+.media-container--fullscreen {
+  grid-template-columns: 0px auto 0px;
+}
 .media-container__nav--right,
 .media-container__nav--left {
   text-align: center;

src/pytest_html/resources/style.css

@@ -31,6 +31,7 @@ const setup = (resultBody, assets) => {
     }
 
     const mediaViewer = new MediaViewer(assets)
+    const container = resultBody.querySelector('.media-container')
     const leftArrow = resultBody.querySelector('.media-container__nav--left')
     const rightArrow = resultBody.querySelector('.media-container__nav--right')
     const mediaName = resultBody.querySelector('.media__name')
@@ -68,9 +69,12 @@ const setup = (resultBody, assets) => {
     const openImg = () => {
         window.open(mediaViewer.activeFile.path, '_blank')
     }
-
-    leftArrow.addEventListener('click', moveLeft)
-    rightArrow.addEventListener('click', doRight)
+    if (assets.length === 1) {
+        container.classList.add('media-container--fullscreen')
+    } else {
+        leftArrow.addEventListener('click', moveLeft)
+        rightArrow.addEventListener('click', doRight)
+    }
     imageEl.addEventListener('click', openImg)
 }