From 99d9943e267041f2effa2833d29f63929c163b45 Mon Sep 17 00:00:00 2001
From: buttercat1791 <mjjurkoic@gmail.com>
Date: Fri, 12 Jul 2024 09:21:41 -0500
Subject: [PATCH] Handle in-article hash path navigation

---
 src/lib/Article.svelte | 79 ++++++++++++++++++++++--------------------
 1 file changed, 42 insertions(+), 37 deletions(-)

diff --git a/src/lib/Article.svelte b/src/lib/Article.svelte
index 55839f8..f0548d5 100644
--- a/src/lib/Article.svelte
+++ b/src/lib/Article.svelte
@@ -16,25 +16,41 @@
     return events.filter((event) => event != null);
   }
 
-  const converter = new showdown.Converter();
+  function normalizeHashPath(str: string): string {
+    return str
+      .toLowerCase()
+      .replace(/\s+/g, '-')
+      .replace(/[^\w-]/g, '');
+  }
 
-  const transitionParams = {
-    x: -320,
-    duration: 200,
-    easing: sineIn
-  };
+  function scrollToElementWithOffset() {
+    const hash = window.location.hash;
+    if (hash) {
+      const targetElement = document.querySelector(hash);
+      if (targetElement) {
+        const headerOffset = 80;
+        const elementPosition = targetElement.getBoundingClientRect().top;
+        const offsetPosition = elementPosition + window.scrollY - headerOffset;
+
+        window.scrollTo({
+          top: offsetPosition,
+          behavior: 'auto',
+        });
+      }
+    }
+  }
 
-  let width: number;
-  let breakpoint: number = 768; // Tailwind md breakpoint
-  let drawerHidden: boolean = false;
-  $: width >= breakpoint
-    ? drawerHidden = false
-    : drawerHidden = true;
   onMount(() => {
-    width >= breakpoint
-      ? drawerHidden = false
-      : drawerHidden = true;
+    window.addEventListener('hashchange', scrollToElementWithOffset);
+    // Also handle the case where the user lands on the page with a hash in the URL
+    scrollToElementWithOffset();
+
+    return () => {
+      window.removeEventListener('hashchange', scrollToElementWithOffset);
+    };
   });
+
+  const converter = new showdown.Converter();
 </script>
 
 {#await getEvents()}
@@ -49,12 +65,12 @@
   <!-- TODO: Handle hash paths for navigation within the article. -->
   <Sidebar class='sidebar-leather fixed top-20 left-0 px-4 w-60' {activeHash}>
     <SidebarWrapper>
-      <SidebarGroup>
+      <SidebarGroup class='sidebar-group-leather overflow-y-scroll'>
         {#each events as event}
           <SidebarItem
             class='sidebar-item-leather'
             label={event.getMatchingTags('title')[0][1]}
-            href={`${$page.url.pathname}#${event.getMatchingTags('title')[0][1]}`}
+            href={`${$page.url.pathname}#${normalizeHashPath(event.getMatchingTags('title')[0][1])}`}
           />
         {/each}
       </SidebarGroup>
@@ -63,7 +79,13 @@
   <div class='flex flex-col space-y-4 max-w-2xl'>
     {#each events as event}
       <div class='note-leather flex flex-col space-y-2'>
-        <Heading tag='h3' class='h-leather'>{event.getMatchingTags('title')[0][1]}</Heading>
+        <Heading
+          tag='h3'
+          class='h-leather'
+          id={normalizeHashPath(event.getMatchingTags('title')[0][1])}
+        >
+          {event.getMatchingTags('title')[0][1]}
+        </Heading>
         {@html converter.makeHtml(event.content)}
       </div>
     {/each}
@@ -71,24 +93,7 @@
 {/await}
 
 <style>
-  .article {
-    display: flex;
-    padding: 1rem;
-  }
-  .toc {
-    padding: 3%;
-    min-width: 5%;
-    padding-top: 1%;
-    border: 1px white solid;
-    border-radius: 10px;
-    border-top-width: 5px;
-  }
-  .article-content {
-    min-width: 80%;
-    max-width: 85%;
-    padding: 1%;
-    border: 1px white solid;
-    border-radius: 10px;
-    border-top-width: 5px;
+  :global(.sidebar-group-leather) {
+    max-height: calc(100vh - 8rem);
   }
 </style>