Mobile Organized Content (#79)

Co-authored-by: William Tran <william.tran1@uwaterloo.ca>
Co-authored-by: Aditya Thakral <a3thakra@csclub.uwaterloo.ca>
Reviewed-on: www/www-new#79
Reviewed-by: Aditya Thakral <a3thakra@csclub.uwaterloo.ca>
Co-authored-by: w25tran <w25tran@localhost>
Co-committed-by: w25tran <w25tran@localhost>

components/OrganizedContent.module.css

@@ -49,7 +49,7 @@
 }
 
 .selected {
-  background-color: var(--primary-accent-dim);
+  background-color: var(--primary-accent-lightest);
   color: var(--primary-accent);
   font-weight: 700;
 }
@@ -124,7 +124,48 @@
   text-decoration: none;
 }
 
+.burger {
+  display: none;
+}
+
+.mobileNavTitle {
+  display: none;
+}
+
 @media only screen and (max-width: calc(768rem / 16)) {
+
+  .burger {
+    display: flex;
+    position: fixed;
+    border: none;
+    bottom: calc(32rem / 16);
+    left: calc(16rem / 16);
+    width: calc(62rem / 16);
+    height: calc(57rem / 16);
+    cursor: pointer;
+    z-index: 9;
+    background: var(--primary-accent-light);
+    border-radius: calc(5rem / 16);
+    transition: transform 0.3s ease-in-out;
+    transform: translateY(calc(94rem / 16));
+    padding: calc(11rem / 16) calc(9rem / 16);
+  }
+
+  .burgerVisible {
+    transform: translateY(0);
+  }
+
+  .burger > svg {
+    width: 100%;
+    height: 100%;
+    stroke: var(--primary-accent);
+  }
+
+  .navItem {
+    width: auto;
+    padding: 0 calc(16rem / 16);
+  }
+
   .content h1 {
     font-size: calc(18rem / 16);
   }
@@ -138,6 +179,52 @@
   }
 
   .nav {
-    display: none;
+    position: fixed;
+
+    top: 0;
+    left: 0;
+    overflow-y: auto;
+    z-index: 30;
+
+    margin: 0;
+    background: var(--primary-accent-lighter);
+    width: calc(288rem / 16);
+
+    transform: translateX(-100vw);
+    transition: 0.5s;
+  }
+
+  .navMobileBackground {
+    position: fixed;
+    visibility: hidden;
+
+    width: 100%;
+    height: 100%;
+    top: 0;
+    left: 0;
+    z-index: 20;
+
+    background-color: var(--navbar-page-overlay);
+    opacity: 0;
+
+    transition: 0.5s;
+  }
+  
+  .mobileNavOpen {
+    transform: translateX(0);
+  }
+  
+  .mobileNavTitle {
+    display: flex;
+    font-size: calc(24rem / 16);
+    font-weight: 700;
+    margin: calc(14rem / 16);
+    margin-top: calc(39rem / 16);
+  }
+
+  .show.navMobileBackground {
+    visibility: visible;
+    opacity: 100%;
   }
 }
+

components/OrganizedContent.tsx

@@ -1,5 +1,12 @@
 import NextLink from "next/link";
-import React, { ReactNode, ComponentType } from "react";
+import React, {
+  ReactNode,
+  ComponentType,
+  useState,
+  useRef,
+  useEffect,
+  useCallback,
+} from "react";
 
 import styles from "./OrganizedContent.module.css";
 
@@ -17,6 +24,7 @@ interface Props {
   sections: Section[];
   id: string;
   children: ReactNode;
+  pageTitle: string;
   link: Link;
 }
 
@@ -24,8 +32,10 @@ export function OrganizedContent({
   sections,
   id,
   children,
+  pageTitle,
   link: Link,
 }: Props) {
+  const [mobileNavOpen, setMobileNavOpen] = useState(false);
   const currentIndex = sections.findIndex(
     ({ id: sectionId }) => sectionId === id
   );
@@ -36,10 +46,34 @@ export function OrganizedContent({
 
   const section = sections[currentIndex];
   const isReadAll = section.id === READ_ALL_ID;
+  const ref = useRef<HTMLDivElement>(null);
+  const isVisible = useOnScreen(ref.current);
+  const burgerVisible = useBurger(isVisible);
+
+  useEffect(() => {
+    mobileNavOpen
+      ? (document.body.style.overflow = "hidden")
+      : (document.body.style.overflow = "visible");
+  }, [mobileNavOpen]);
 
   return (
-    <div className={styles.wrapper}>
-      <Nav sections={sections} currentIndex={currentIndex} link={Link} />
+    <div className={styles.wrapper} ref={ref}>
+      <div
+        className={
+          mobileNavOpen
+            ? `${styles.navMobileBackground} ${styles.show}`
+            : styles.navMobileBackground
+        }
+        onClick={() => setMobileNavOpen(false)}
+      />
+      <Nav
+        sections={sections}
+        currentIndex={currentIndex}
+        link={Link}
+        pageTitle={pageTitle}
+        mobileNavOpen={mobileNavOpen}
+        setMobileNavOpen={setMobileNavOpen}
+      />
       <div className={styles.content}>
         {isReadAll ? (
           children
@@ -57,6 +91,14 @@ export function OrganizedContent({
           </>
         )}
       </div>
+      <button
+        className={`${styles.burger} ${
+          burgerVisible ? styles.burgerVisible : ""
+        }`}
+        onClick={() => setMobileNavOpen(!mobileNavOpen)}
+      >
+        <Burger />
+      </button>
     </div>
   );
 }
@@ -65,11 +107,29 @@ interface NavProps {
   sections: Section[];
   currentIndex: number;
   link: Link;
+  pageTitle: string;
+  mobileNavOpen: boolean;
+  setMobileNavOpen: (mobileNavOpen: boolean) => void;
 }
 
-function Nav({ sections, currentIndex, link: Link }: NavProps) {
+function Nav({
+  sections,
+  currentIndex,
+  link: Link,
+  pageTitle,
+  mobileNavOpen,
+  setMobileNavOpen,
+}: NavProps) {
+  const navStyles = mobileNavOpen
+    ? [styles.nav, styles.mobileNavOpen]
+    : [styles.nav];
+
   return (
-    <nav className={styles.nav}>
+    <nav
+      className={navStyles.join(" ")}
+      onClick={(event) => event.stopPropagation()}
+    >
+      <h1 className={styles.mobileNavTitle}>{pageTitle}</h1>
       {sections.map((section, index) => {
         const classNames = [styles.navItem];
 
@@ -82,14 +142,17 @@ function Nav({ sections, currentIndex, link: Link }: NavProps) {
         }
 
         return (
-          <Link
-            className={classNames.join(" ")}
-            id={section.id}
+          <div
+            onClick={() => {
+              setMobileNavOpen(false);
+            }}
             key={section.id}
           >
-            <span className={styles.marker} />
-            <div>{section.title}</div>
-          </Link>
+            <Link className={classNames.join(" ")} id={section.id}>
+              <span className={styles.marker} />
+              <div>{section.title}</div>
+            </Link>
+          </div>
         );
       })}
     </nav>
@@ -137,6 +200,20 @@ function Footer({ sections, currentIndex, link: Link }: FooterProps) {
   );
 }
 
+function useDebounce(func: () => void, delay = 300) {
+  const timerRef = useRef<number | undefined>(undefined);
+  return useCallback(() => {
+    if (timerRef.current != null) {
+      return;
+    }
+
+    timerRef.current = window.setTimeout(() => {
+      func();
+      timerRef.current = undefined;
+    }, delay);
+  }, [func, delay]);
+}
+
 export interface SectionWithContent {
   section: Section;
   Content: ComponentType;
@@ -216,3 +293,91 @@ function Arrow({ direction }: { direction: "left" | "right" }) {
     </svg>
   );
 }
+
+function useOnScreen(element: HTMLDivElement | null) {
+  const [isIntersecting, setIntersecting] = useState(false);
+
+  useEffect(() => {
+    const observer = new IntersectionObserver(([entry]) =>
+      setIntersecting(entry.isIntersecting)
+    );
+
+    if (element) {
+      observer.observe(element);
+    }
+    // Remove the observer as soon as the component is unmounted
+    return () => {
+      observer.disconnect();
+    };
+  }, [element]);
+
+  return isIntersecting;
+}
+
+function useBurger(componentIsVisible: boolean): boolean {
+  const [prevScrollPos, setPrevScrollPos] = useState(0);
+  const [burgerVisible, setBurgerVisible] = useState(true);
+
+  const handleScroll = useDebounce(() => {
+    // find current scroll position
+    const currentScrollPos = window.pageYOffset;
+    setBurgerVisible(
+      componentIsVisible &&
+        ((prevScrollPos > currentScrollPos &&
+          prevScrollPos - currentScrollPos > 70) ||
+          currentScrollPos < 10)
+    );
+
+    // set state to new scroll position
+    setPrevScrollPos(currentScrollPos);
+  });
+
+  useEffect(() => {
+    window.addEventListener("scroll", handleScroll);
+
+    return () => window.removeEventListener("scroll", handleScroll);
+  }, [handleScroll]);
+
+  return burgerVisible;
+}
+
+// Inlining this svg because we want to fill in colors using css variables
+function Burger() {
+  return (
+    <svg
+      width="30"
+      height="23"
+      viewBox="0 0 30 23"
+      fill="none"
+      xmlns="http://www.w3.org/2000/svg"
+    >
+      <line
+        x1="28"
+        y1="2"
+        x2="2"
+        y2="2"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <line
+        x1="28"
+        y1="11.375"
+        x2="2"
+        y2="11.375"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+      <line
+        x1="28"
+        y1="20.75"
+        x2="2"
+        y2="20.75"
+        strokeWidth="4"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+    </svg>
+  );
+}

components/OrganizedContent/ReadAll.tsx

@@ -69,6 +69,7 @@ export function createReadAllPage({
             readAllSection.section,
             ...sections.map(({ section }) => section),
           ]}
+          pageTitle={title}
           link={Link}
         >
           <readAllSection.Content />

components/OrganizedContent/Section.tsx

@@ -39,6 +39,7 @@ export function createSectionPage({
         <OrganizedContent
           sections={sections}
           id={sections[current].id}
+          pageTitle={title}
           link={Link}
         >
           <MDXRemote {...content} />

components/Theme.tsx

@@ -22,7 +22,8 @@ export const PALETTE_NAMES = [
   "--primary-accent",
   "--primary-accent-soft",
   "--primary-accent-light",
-  "--primary-accent-dim",
+  "--primary-accent-lighter",
+  "--primary-accent-lightest",
 
   "--secondary-accent",
   "--secondary-accent-light",

components/playground.tsx

@@ -238,7 +238,12 @@ export function OrganizedContentDemo() {
   )!.Content;
 
   return (
-    <OrganizedContent sections={sections} id={id} link={FakeLink}>
+    <OrganizedContent
+      sections={sections}
+      id={id}
+      link={FakeLink}
+      pageTitle="Playground"
+    >
       <Content />
     </OrganizedContent>
   );

pages/_app.css

@@ -10,7 +10,8 @@ body {
   --primary-accent: #1482e3;
   --primary-accent-soft: #5caff9;
   --primary-accent-light: #c4e0f8;
-  --primary-accent-dim: #f7fbff;
+  --primary-accent-lighter: #e1eefa;
+  --primary-accent-lightest: #f7fbff;
 
   --secondary-accent: #4ed4b2;
   --secondary-accent-light: #dcf6f0;