From 09c8116444101c5101744c3e31c882557fea028c Mon Sep 17 00:00:00 2001
From: Techit Thawiang <techit@thawiang>
Date: Thu, 16 Oct 2025 22:46:55 +0700
Subject: [PATCH] add support for toc

---
 app/assets/css/main.css          | 142 +++++++++++++++++++++----------
 app/components/post-toc.vue      | 140 ++++++++++++++++++++++++++++++
 app/pages/posts/[...slug].vue    |  32 +++----
 app/pages/projects/[...slug].vue |  20 ++---
 4 files changed, 257 insertions(+), 77 deletions(-)
 create mode 100644 app/components/post-toc.vue

diff --git a/app/assets/css/main.css b/app/assets/css/main.css
index 3a6be95..ac9cf92 100644
--- a/app/assets/css/main.css
+++ b/app/assets/css/main.css
@@ -13,11 +13,13 @@
     --color-primary: #2e2e2e;
     --color-primary-strong: #3e3e3e;
     --color-on-primary: white;
+    --color-on-primary-weak: #ebebeb;
     --color-secondary: #efefef;
     --color-secondary-strong: #dfdfdf;
     --color-on-secondary: #2e2e2e;
     --color-container: #f8f8f8;
     --color-on-container: #0e0e0e;
+    --color-outline-very-intense: #a0a0a0;
     --color-outline-intense: #c0c0c0;
     --color-outline: #d9d9d9;
     --color-accent: #0066ff;
@@ -25,24 +27,15 @@
     --color-inverse: #ff6600;
     --color-inverse-strong: #d55500;
 
-    --font-sans: Roboto, Sarabun, sans-serif;
+    --font-sans: "Fira Sans", "Noto Sans Thai Looped", sans-serif;
     --font-sans--font-feature-settings: "liga", "calt";
-    --font-mono: RobotoMono, "Roboto Mono", "SF Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
-    --font-serif: RobotoSerif, NotoSerifThai, Georgia, Garamond, "Times New Roman", Times, serif;
-    --font-math: CMUSerif, "Cambria Math", "LatinModern Math", "STIXGeneral", math;
+    --font-mono: "Fira Mono", "SF Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+    --font-serif: 'Linux Libertine','Georgia', 'Source Serif 4', Georgia, Garamond, "Times New Roman", Times, 'Noto Serif Thai', serif;
 
     --ease-fluid: 0.2, 0, 0, 1;
     --ease-fluid-in: .6, .2, .7, .4;
     --ease-out-back: 0.34, 1.56, 0.64, 1;
 }
-@supports (font-variation-settings: normal) {
-    :root {
-        --font-sans: RobotoVariable, Sarabun, sans-serif;
-        --font-mono: RobotoMonoVariable, "SF Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
-        --font-serif: RobotoSerifVariable, NotoSerifThai, Georgia, Garamond, "Times New Roman", Times, serif;
-        font-optical-sizing: auto;
-    }
-}
 @keyframes ring {
     0% {
         outline: 0px solid var(--ui-ring-color);
@@ -78,15 +71,25 @@ body,main {
 }
 img {
     border-radius: calc(var(--ui-spacing)*1);
-    max-width: 100%;
-    height: auto;
     display: block;
+    max-width: 100%;
 }
 a {
     color: unset;
     text-decoration: none;
 
 }
+code,tt,kbd,pre {
+    font-family: var(--font-mono);
+    font-size: inherit;
+}
+h1,h2,h3,h4,h5,h6 { font-family: var(--font-serif); font-weight: 400; }
+h1 { font-size: 1.80em; }
+h2 { font-size: 1.50em; }
+h3 { font-size: 1.25em; }
+h4 { font-size: 1.10em; }
+h5 { font-size: 1.00em; }
+h6 { font-size: 0.90em; }
 .material-symbols-outlined {
     font-variation-settings:
         'FILL' 0,
@@ -99,6 +102,7 @@ a {
     top: 0;
     width: 100%;
     overflow: visible;
+    z-index: 100;
 }
 .web-header, .hamburger-menu-header {
     box-sizing: border-box;
@@ -137,6 +141,14 @@ a {
 .web-nav, .web-footer-content, .article {
     width: 100%;
 }
+.article.article-special h1,
+.article.article-special h2,
+.article.article-special h3,
+.article.article-special h4,
+.article.article-special h5,
+.article.article-special h6 {
+    border-bottom: 1px solid var(--color-outline-very-intense);
+}
 .web-footer-title {
     font-size: 32px;
     margin-block: .4em;
@@ -183,19 +195,17 @@ p {
     margin-block: 1em;
 }
 .font-hero {
-    font-size: 48px;
-    font-weight: 700;
+    font-size: 40px;
     margin-block: 0.2em;
     line-height: 1.3;
+    font-weight: 700;
 }
 .font-hero-desc {
     font-size: 20px;
     font-weight: 500;
 }
 .web-title {
-    font-size: 30px;
-    font-weight: 700;
-    margin-block: 0.4em;
+    margin-block: 0.5em;
     transition-property: color;
     transition-duration: 100ms;
     transition-timing-function: cubic-bezier(var(--ease-fluid));
@@ -227,7 +237,6 @@ p {
 .web-nav-title {
     --web-nav-title-shadow: 0px 0px 16px var(--ui-bg);
     font-size: 18px;
-    font-weight: 700;
 }
 .web-hero-post {
     display: flex;
@@ -255,6 +264,19 @@ p {
     font-size: 20px;
     line-height: 1.5;
 }
+.article.article-footer a:hover {
+    color: var(--color-primary);
+    background: var(--color-on-primary);
+}
+.article.article-footer {
+    color: var(--color-on-primary-weak);
+    background: var(--color-primary);
+    padding-block: calc(var(--ui-spacing)*12);
+}
+.article.article-footer > .web-section {
+    display: flex;
+    margin-block: 0;
+}
 @media screen and (min-width: 768px) {
     .web-section.web-section-split {
         flex-direction: row;
@@ -271,6 +293,7 @@ p {
     max-width: var(--ui-container-narrow);
 }
 .project-card-container, .font-card-container, .post-card-container {
+    margin-block: 1em;
     background: var(--color-container);
     color: var(--color-on-container);
     display: flex;
@@ -309,7 +332,6 @@ p {
     margin-left: 0;
     h3 {
         font-size: 24px;
-        font-weight: 700;
         overflow: hidden;
         display: -webkit-box;
         -webkit-box-orient: vertical;
@@ -320,6 +342,7 @@ p {
         aspect-ratio: 16/9;
         object-fit: cover;
         width: 100%;
+        border-radius: 0;
     }
     p {
         margin: 0;
@@ -361,7 +384,7 @@ p {
         flex-direction: row;
         img {
             margin-bottom: 0;
-            max-width: calc(var(--ui-spacing)*56);
+            max-width: calc(var(--ui-spacing)*64);
         }
         .project-card-content, .font-card-content, .post-card-content {
             padding-inline: calc(var(--ui-spacing)*4);
@@ -556,33 +579,39 @@ a.btn {
     font-size: 12px;
     text-transform: uppercase;
 }
+.post-container {
+    display: flex;
+    flex-direction: column-reverse;
+}
+@media screen and (min-width: 1024px) {
+    .post-container {
+        display: flex;
+        flex-direction: row;
+    }
+}
 .prose {
-    font-family: var(--font-serif);
     font-weight: 400;
-    font-size: 18px;
-    p, li { line-height: 1.5; }
-    hr { margin-block: 1em; border: 1px solid var(--color-outline-intense); }
-    li { margin-block: 1em; }
-    img { display: block; }
-    h1,h2,h3,h4,h5,h6 {
-        font-family: var(--font-serif);
-        font-weight: 700;
-        scroll-margin-top: 80px;
-    }
-    h2 {
-        font-size: 24px;
-        margin-block: calc(var(--ui-spacing)*6);
-    }
-    h3 {
-        font-size: 20px;
-        margin-block: calc(var(--ui-spacing)*6);
-    }
-    h4 {
-        font-size: 18px;
-        margin-block: calc(var(--ui-spacing)*6);
-    }
-    img {
-        margin-block: calc(var(--ui-spacing)*3);
+    width: 100%;
+    flex: 3;
+}
+.prose p, li { line-height: 1.5; }
+.prose hr { margin-block: 1em; border: 1px solid var(--color-outline-intense); }
+.prose li { margin-block: 1em; }
+.prose h1,h2,h3,h4,h5,h6 {
+    font-family: var(--font-serif);
+    scroll-margin-top: 80px;
+}
+.prose img {
+    margin-block: calc(var(--ui-spacing)*3);
+}
+.prose-toc {
+    flex: 1;
+    width: 100%;
+    max-width: 320px;
+}
+@media screen and (min-width: 1024px) {
+    .prose-toc {
+        margin-left: calc(var(--ui-spacing)*5)
     }
 }
 .post-cover {
@@ -609,4 +638,23 @@ a.btn {
     margin-top: calc(var(--ui-spacing)*4);
     font-size: 12px;
     font-family: var(--font-mono);
+}
+.toc {
+    position: sticky;
+    top: calc(var(--ui-header-height) + calc(var(--ui-spacing)*4));
+}
+.toc > .toc-text {
+    margin-block: 0.5em;
+    font-weight: 700;
+}
+.toc > ul {
+    padding: 0;
+    margin: 0;
+    list-style: none;
+}
+.toc .toc-link-indent-3 {
+    margin-left: calc(var(--ui-spacing)*3);
+}
+.toc .toc-link-indent-4 {
+    margin-left: calc(var(--ui-spacing)*6);
 }
\ No newline at end of file
diff --git a/app/components/post-toc.vue b/app/components/post-toc.vue
new file mode 100644
index 0000000..0cdba64
--- /dev/null
+++ b/app/components/post-toc.vue
@@ -0,0 +1,140 @@
+<template>
+  <nav class="toc">
+    <p class="toc-text">Table of Contents</p>
+    <ul v-if="toc.length">
+      <template v-for="item in toc" :key="item.id">
+        <li>
+            <a 
+              :href="'#' + item.id" 
+              @click.prevent="scrollToHeading(item.id)"
+              :class="`toc-link ${indentClass(item.depth)} ${activeId === item.id ? 'text-accent' : ''}`"
+            >
+              <span>
+                {{ item.text }}
+              </span>
+            </a>
+        </li>
+
+        <!-- Render children if any -->
+        <template v-if="item.children?.length">
+          <li v-for="child in item.children" :key="child.id">
+            <UTooltip :text="child.text">
+              <a 
+                :href="'#' + child.id" 
+                @click.prevent="scrollToHeading(child.id)"
+                :class="`toc-link ${indentClass(child.depth)} ${activeId === child.id ? 'text-accent' : ''}`"
+              >
+                <span>
+                  {{ child.text }}
+                </span>
+              </a>
+            </UTooltip>
+          </li>
+        </template>
+      </template>
+    </ul>
+    <p v-else>
+      Not available
+    </p>
+  </nav>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onUnmounted, computed } from 'vue'
+
+type TocItem = {
+  id: string
+  depth: number
+  text: string
+  children?: TocItem[]
+}
+
+// Props
+const props = defineProps<{
+  toc: TocItem[]
+}>()
+
+// Active heading ID
+const activeId = ref<string>('');
+
+// Get all headings from toc (flattened)
+const allHeadings = computed(() => {
+  const headings: TocItem[] = [];
+  
+  props.toc.forEach(item => {
+    headings.push(item);
+    if (item.children?.length) {
+      headings.push(...item.children);
+    }
+  });
+  
+  return headings;
+});
+
+// Function to add indentation based on heading depth
+const indentClass = (depth: number) => {
+  // Customize based on your depth logic
+  switch (depth) {
+    case 1:
+      return 'toc-link-indent'
+    case 2:
+      return 'toc-link-indent-2'
+    case 3:
+      return 'toc-link-indent-3'
+    case 4:
+      return 'toc-link-indent-4'
+    default:
+      return ''
+  }
+}
+
+const scrollToHeading = (id: string) => {
+  const element = document.getElementById(id);
+  if (element) {
+    history.pushState({}, '', `#${id}`);
+    
+    activeId.value = id;
+    
+    // Perform smooth scroll
+    element.scrollIntoView({ 
+      behavior: 'smooth',
+      block: 'start'
+    });
+  }
+};
+
+onMounted(() => {
+  setTimeout(() => {
+    const observer = new IntersectionObserver(
+      (entries) => {
+        const visibleHeadings = entries
+          .filter(entry => entry.isIntersecting)
+          .map(entry => entry.target.id);
+        if (visibleHeadings.length > 0) {
+          activeId.value = visibleHeadings[0];
+        }
+      },
+      {
+        rootMargin: '-10% 0px -85% 0px',
+        threshold: 0.1
+      }
+    );
+    allHeadings.value.forEach(heading => {
+      const element = document.getElementById(heading.id);
+      if (element) {
+        observer.observe(element);
+      }
+    });
+    onUnmounted(() => {
+      observer.disconnect();
+    });
+  }, 100);
+});
+</script>
+
+<style scoped>
+.toc a {
+  display: block;
+  padding: 2px 0;
+}
+</style>
\ No newline at end of file
diff --git a/app/pages/posts/[...slug].vue b/app/pages/posts/[...slug].vue
index 5ac3f9a..02dfabd 100644
--- a/app/pages/posts/[...slug].vue
+++ b/app/pages/posts/[...slug].vue
@@ -1,6 +1,6 @@
 <template>
     <main>
-        <article v-if="post" class="article">
+        <article v-if="post" :key="route.path" class="article article-special">
             <section class="web-section" aria-labelledby="hero" aria-describedby="hero-desc">
                 <section class="max-w-6xl mx-auto z-[1]">
                   <small class="prose-blog-pretext" aria-hidden="true">You are reading blog post:</small>
@@ -13,10 +13,13 @@
                   </div>
                 </section>
             </section>
-            <section class="web-section web-section" aria-labelledby="post-content" aria-describedby="post-content-desc">
-                <div class="prose">
-                    <ContentRenderer v-if="post" :value="post"/>
-                </div>
+            <section class="web-section web-section">
+              <div class="post-container">
+                <ContentRenderer class="prose" v-if="post" :value="post"/>
+                <section class="prose-toc">
+                  <PostToc :toc="post?.body?.toc?.links"/>
+                </section>
+              </div>
             </section>
         </article>
         <article v-else class="article">
@@ -25,7 +28,7 @@
                   <small class="prose-blog-pretext" aria-hidden="true">An error occurred:</small>
                   <h1 id="hero" class="font-hero">Post not found!</h1>
                   <div class="post-cover">
-                    <section class="w-full">
+                    <section>
                       <p id="hero-desc" class="font-hero-desc">Check the URL; there might be a misspelling, or the post may not actually exist.</p>
                       <NuxtLink class="btn" to="/posts">All posts</NuxtLink>
                     </section>
@@ -33,26 +36,19 @@
                   </div>
                 </section>
             </section>
-            <section class="web-section web-section" aria-labelledby="post-content" aria-describedby="post-content-desc">
-                <div class="prose">
-                    <ContentRenderer v-if="post" :value="post"/>
-                </div>
-            </section>
         </article>
     </main>
 </template>
   
 <script lang="ts" setup>
 const config = useRuntimeConfig();
-const baseUrl = config.public.baseUrl
 const route = useRoute()
 
-// const { data: post } = await useAsyncData(route.path, () => {
-//   return queryCollection('posts').path(route.path).first()
-// })
-
-const { data: post } = await useAsyncData(() => queryCollection('posts').path(route.path).first())
-
+const { data: post } = await useAsyncData(route.path, () => {
+  return queryCollection('posts').path(route.path).first()
+})
+// This is the problem? Why the heck it decides to print every post as the same latest post?
+// const { data: post } = await useAsyncData(() => queryCollection('posts').path(route.path).first())
 const ogUrl = config.public.baseUrl + route.path
 useSeoMeta({
   title: post.value?.title,
diff --git a/app/pages/projects/[...slug].vue b/app/pages/projects/[...slug].vue
index 01967a5..8f4b322 100644
--- a/app/pages/projects/[...slug].vue
+++ b/app/pages/projects/[...slug].vue
@@ -1,6 +1,6 @@
 <template>
     <main>
-        <article v-if="project" class="article">
+        <article v-if="project" :key="route.path" class="article">
             <section class="web-section" aria-labelledby="hero" aria-describedby="hero-desc">
                 <section class="max-w-6xl mx-auto z-[1]">
                   <small class="prose-blog-pretext" aria-hidden="true">You are viewing project:</small>
@@ -13,10 +13,13 @@
                   </div>
                 </section>
             </section>
-            <section class="web-section web-section" aria-labelledby="project-content" aria-describedby="project-content-desc">
-                <div class="prose">
-                    <ContentRenderer v-if="project" :value="project"/>
-                </div>
+            <section class="web-section web-section">
+              <div class="post-container">
+                <ContentRenderer class="prose" v-if="project" :value="project"/>
+                <section class="prose-toc">
+                  <PostToc :toc="project?.body?.toc?.links"/>
+                </section>
+              </div>
             </section>
         </article>
         <article v-else class="article">
@@ -33,18 +36,12 @@
                   </div>
                 </section>
             </section>
-            <section class="web-section web-section" aria-labelledby="post-content" aria-describedby="post-content-desc">
-                <div class="prose">
-                    <ContentRenderer v-if="post" :value="post"/>
-                </div>
-            </section>
         </article>
     </main>
 </template>
   
 <script lang="ts" setup>
 const config = useRuntimeConfig();
-const baseUrl = config.public.baseUrl
 const route = useRoute()
 
 // const { data: post } = await useAsyncData(route.path, () => {
@@ -52,7 +49,6 @@ const route = useRoute()
 // })
 
 const { data: project } = await useAsyncData(() => queryCollection('projects').path(route.path).first())
-
 const ogUrl = config.public.baseUrl + route.path
 useSeoMeta({
   title: project.value?.title,