From 8e23062fa94e789475d23c5c52b8086ba1c424e3 Mon Sep 17 00:00:00 2001
From: Sangelo <contact@sangelo.space>
Date: Tue, 12 Mar 2024 18:14:54 +0100
Subject: [PATCH] Scroll Behaviour Changes using GSAP - Currently broken on
 Chromium. Safari and Firefox work just fine.

---
 package.json            |  1 +
 src/lib/index.ts        | 49 +++++++++++++++++++++++++++++++++--------
 src/routes/+page.svelte | 32 ++++++++++++++++++++++++++-
 src/styles/index.scss   |  4 ++--
 yarn.lock               |  5 +++++
 5 files changed, 79 insertions(+), 12 deletions(-)

diff --git a/package.json b/package.json
index f68dd24..6ca91d5 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
 	},
 	"type": "module",
 	"dependencies": {
+		"gsap": "^3.12.5",
 		"md-block": "^0.0.1",
 		"svelte-material-icons": "^3.0.5",
 		"svelte-transition": "^0.0.10"
diff --git a/src/lib/index.ts b/src/lib/index.ts
index 4905f7d..16fc791 100644
--- a/src/lib/index.ts
+++ b/src/lib/index.ts
@@ -2,19 +2,50 @@
 
 import { goto } from '$app/navigation';
 
+import { gsap } from 'gsap';
+import { ScrollToPlugin } from 'gsap/dist/ScrollToPlugin';
+
+// export function smoothScrollTo(elementId: string) {
+//     const element = document.getElementById(elementId);
+//     if (element) {
+//         element.scrollIntoView({
+//             behavior: 'smooth'
+//         });
+//     }
+// }
+
 export function smoothScrollTo(elementId: string) {
+    gsap.registerPlugin(ScrollToPlugin);
     const element = document.getElementById(elementId);
-    if (element) {
-        element.scrollIntoView({
-            behavior: 'smooth'
-        });
-    }
+    if (!element) return;
+
+    // Function to disable scrolling
+    const disableScroll = (event: Event) => event.preventDefault();
+
+    // Disable scrolling through various events
+    window.addEventListener('wheel', disableScroll, { passive: false });
+    window.addEventListener('touchmove', disableScroll, { passive: false });
+    window.addEventListener('keydown', (event) => {
+        // Prevent scrolling through spacebar, arrow keys, page up/down
+        if (['Space', 'PageUp', 'PageDown', 'ArrowUp', 'ArrowDown'].includes(event.code)) {
+            event.preventDefault();
+        }
+    }, { passive: false });
+
+    gsap.to(window, {
+        scrollTo: { y: element, autoKill: false },
+        duration: 0.1,
+        ease: "power4.out",
+        onComplete: () => {
+            // Re-enable scrolling after animation
+            window.removeEventListener('wheel', disableScroll);
+            window.removeEventListener('touchmove', disableScroll);
+            window.removeEventListener('keydown', disableScroll);
+        }
+    });
 }
 
-// export function redirectToHome() {
-//     // goto('/');
-//     smoothScrollTo('home');
-// }
+
 
 export function handleKeydown(event: KeyboardEvent) {
     // Trigger redirection on Enter key or Space bar
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index 183aefd..897d966 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -1,9 +1,39 @@
 <script lang="ts">
+	import { onMount } from 'svelte';
+	import { smoothScrollTo } from '$lib/index';
+	import { gsap } from 'gsap';
+	import { ScrollTrigger } from 'gsap/dist/ScrollTrigger';
+	import { ScrollToPlugin } from 'gsap/dist/ScrollToPlugin';
 
 	import Home from '$lib/components/Home.svelte';
 	import About from '$lib/components/About.svelte';
 	import Projects from '$lib/components/Projects.svelte';
 	import Socials from '$lib/components/Socials.svelte';
+	import { goto } from '$app/navigation';
+
+	onMount(() => {
+		gsap.registerPlugin(ScrollTrigger, ScrollToPlugin);
+
+		// Assuming each section component has an id set to 'home', 'about', 'projects', 'socials'
+		const sectionIds = ['home', 'about', 'projects', 'socials'];
+
+		sectionIds.forEach((id, i) => {
+			ScrollTrigger.create({
+				trigger: `#${id}`,
+				onEnter: () => smoothScrollTo(id),
+				start: 'top bottom',
+				end: 'bottom top',
+				markers: true
+			});
+
+			ScrollTrigger.create({
+				trigger: `#${id}`,
+				start: 'bottom top',
+				onEnterBack: () => smoothScrollTo(id),
+				markers: true
+			});
+		});
+	});
 
 </script>
 
@@ -16,4 +46,4 @@
 
 <style lang="scss">
 	@import '$styles/index.scss';
-</style>
\ No newline at end of file
+</style>
diff --git a/src/styles/index.scss b/src/styles/index.scss
index 0501abb..017ad2b 100644
--- a/src/styles/index.scss
+++ b/src/styles/index.scss
@@ -2,8 +2,8 @@
 .container {
 	height: 100vh;
 	width: 100%;
-	scroll-snap-type: y mandatory;
-	overflow-y: scroll;
+	// scroll-snap-type: y mandatory;
+	// overflow-y: scroll;
 }
 
 .section {
diff --git a/yarn.lock b/yarn.lock
index 635ab42..b38a064 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -934,6 +934,11 @@ graphemer@^1.4.0:
   resolved "https://registry.yarnpkg.com/graphemer/-/graphemer-1.4.0.tgz#fb2f1d55e0e3a1849aeffc90c4fa0dd53a0e66c6"
   integrity sha512-EtKwoO6kxCL9WO5xipiHTZlSzBm7WLT627TqC/uVRd0HKmq8NXyebnNYxDoBi7wt8eTWrUrKXCOVaFq9x1kgag==
 
+gsap@^3.12.5:
+  version "3.12.5"
+  resolved "https://registry.yarnpkg.com/gsap/-/gsap-3.12.5.tgz#136c02dad4c673b441bdb1ca00104bfcb4eae7f4"
+  integrity sha512-srBfnk4n+Oe/ZnMIOXt3gT605BX9x5+rh/prT2F1SsNJsU1XuMiP0E2aptW481OnonOGACZWBqseH5Z7csHxhQ==
+
 has-flag@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-4.0.0.tgz#944771fd9c81c81265c4d6941860da06bb59479b"