feat(mobile): tabs and scrolling

src/layouts/StickySideColumns.module.scss

@@ -9,12 +9,18 @@
     grid-auto-flow: column;
     grid-auto-columns: 100%;
 
+    // Hide Scrollbar and let's use tabs to navigate
+    -ms-overflow-style: none; /* Internet Explorer 10+ */
+    scrollbar-width: none; /* Firefox */
+    &::-webkit-scrollbar {
+      display: none; /* Safari and Chrome */
+    }
     overflow-x: auto;
     overscroll-behavior-inline: contain;
-
     scroll-snap-type: inline mandatory;
 
     > * {
+      scroll-margin-top: $header-height + $body-vertical-padding;
       scroll-snap-align: start;
     }
   }
@@ -54,3 +60,25 @@
     overflow-y: auto;
   }
 }
+
+.navTabs {
+  display: none;
+  position: fixed;
+  left: 0;
+  bottom: 0;
+  right: 0;
+  z-index: 2;
+  background: $overlay-background-color;
+  box-shadow: 0 0 4px 0 rgb(0, 0, 0, 0.1);
+
+  padding: 5px;
+  gap: 5px;
+
+  @media only screen and (max-width: 767px) {
+    display: flex;
+  }
+
+  > li {
+    flex-grow: 1;
+  }
+}

src/layouts/StickySideColumns.tsx

@@ -1,6 +1,13 @@
-import { PropsWithChildren, ReactNode } from 'react'
+import { PropsWithChildren, ReactNode, useRef, useState } from 'react'
 
 import styles from './StickySideColumns.module.scss'
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
+import {
+  faFile,
+  faFileCirclePlus,
+  faToolbox
+} from '@fortawesome/free-solid-svg-icons'
+import { Button } from '@mui/material'
 
 interface StickySideColumnsProps {
   left?: ReactNode
@@ -12,19 +19,70 @@ export const StickySideColumns = ({
   right,
   children
 }: PropsWithChildren<StickySideColumnsProps>) => {
+  const ref = useRef<HTMLDivElement>(null)
+  const [tab, setTab] = useState('nav-content')
+  const handleNavClick = (id: string) => {
+    setTab(id)
+    const x = document.getElementById(id)?.offsetLeft
+    if (ref.current) {
+      ref.current.scrollTo({
+        left: x,
+        behavior: 'smooth'
+      })
+    }
+  }
+  const isActive = (id: string) => id === tab
+
   return (
-    <div className={styles.container}>
-      <div className={`${styles.sidesWrap} ${styles.files}`}>
-        <div className={styles.sides}>{left}</div>
-      </div>
-      <div>
-        <div id="content-preview" className={styles.content}>
-          {children}
+    <>
+      <div className={styles.container} ref={ref}>
+        <div id="nav-left" className={`${styles.sidesWrap} ${styles.files}`}>
+          <div className={styles.sides}>{left}</div>
+        </div>
+        <div id="nav-content">
+          <div id="content-preview" className={styles.content}>
+            {children}
+          </div>
+        </div>
+        <div id="nav-right" className={styles.sidesWrap}>
+          <div className={styles.sides}>{right}</div>
         </div>
       </div>
-      <div className={styles.sidesWrap}>
-        <div className={styles.sides}>{right}</div>
-      </div>
-    </div>
+      <ul className={styles.navTabs}>
+        <li>
+          <Button
+            fullWidth
+            variant="text"
+            onClick={() => handleNavClick('nav-left')}
+            className={`${isActive('nav-left') && styles.active}`}
+            aria-label="nav left"
+          >
+            <FontAwesomeIcon icon={faFileCirclePlus} />
+          </Button>
+        </li>
+        <li>
+          <Button
+            fullWidth
+            variant="text"
+            onClick={() => handleNavClick('nav-content')}
+            className={`${isActive('nav-content') && styles.active}`}
+            aria-label="nav middle"
+          >
+            <FontAwesomeIcon icon={faFile} />
+          </Button>
+        </li>
+        <li>
+          <Button
+            fullWidth
+            variant="text"
+            onClick={() => handleNavClick('nav-right')}
+            className={`${isActive('nav-right') && styles.active}`}
+            aria-label="nav right"
+          >
+            <FontAwesomeIcon icon={faToolbox} />
+          </Button>
+        </li>
+      </ul>
+    </>
   )
 }