refactor: render sidebar from data

assets/css/components/sidebar.css

@@ -1,5 +1,5 @@
 @media (max-width: 767px) {
-  .sidebar-container {
+  .hextra-sidebar-container {
     @apply hx-fixed hx-pt-[calc(var(--navbar-height))] hx-top-0 hx-w-full hx-bottom-0 hx-z-[15] hx-overscroll-contain hx-bg-white dark:hx-bg-dark;
     transition: transform 0.8s cubic-bezier(0.52, 0.16, 0.04, 1);
     will-change: transform, opacity;
@@ -8,7 +8,7 @@
   }
 }
 
-.sidebar-container {
+.hextra-sidebar-container {
   li > div {
     @apply hx-h-0;
   }
@@ -18,4 +18,19 @@
   li.open > a > span > svg > path {
     @apply hx-rotate-90;
   }
+
+  .hextra-sidebar-item-list {
+    @apply hx-relative hx-flex hx-flex-col hx-gap-1 before:hx-absolute before:hx-inset-y-1 before:hx-w-px before:hx-bg-gray-200 ltr:hx-ml-3 ltr:hx-pl-3 ltr:before:hx-left-0 rtl:hx-mr-3 rtl:hx-pr-3 rtl:before:hx-right-0 dark:before:hx-bg-neutral-800;
+  }
+
+  .hextra-sidebar-item-link {
+    @apply hx-flex hx-items-center hx-justify-between hx-gap-2 hx-cursor-pointer hx-rounded hx-px-2 hx-py-1.5 hx-text-sm hx-transition-colors;
+
+    &.active {
+      @apply hx-bg-primary-100 hx-font-semibold hx-text-primary-800 contrast-more:hx-border contrast-more:hx-border-primary-500 dark:hx-bg-primary-400/10 dark:hx-text-primary-600 contrast-more:dark:hx-border-primary-500;
+    }
+    &.inactive {
+      @apply hx-text-gray-500 hover:hx-bg-gray-100 hover:hx-text-gray-900 contrast-more:hx-border contrast-more:hx-border-transparent contrast-more:hx-text-gray-900 contrast-more:hover:hx-border-gray-900 dark:hx-text-neutral-400 dark:hover:hx-bg-primary-100/5 dark:hover:hx-text-gray-50 contrast-more:dark:hx-text-gray-50 contrast-more:dark:hover:hx-border-gray-50;
+    }
+  }
 }

assets/js/menu.js

@@ -3,7 +3,7 @@
 document.addEventListener('DOMContentLoaded', function () {
   const menu = document.querySelector('.hamburger-menu');
   const overlay = document.querySelector('.mobile-menu-overlay');
-  const sidebarContainer = document.querySelector('.sidebar-container');
+  const sidebarContainer = document.querySelector('.hextra-sidebar-container');
 
   // Initialize the overlay
   const overlayClasses = ['hx-fixed', 'hx-inset-0', 'hx-z-10', 'hx-bg-black/80', 'dark:hx-bg-black/60'];

assets/js/sidebar.js

@@ -1,3 +1,12 @@
+/**
+ * Check if the element is visible.
+ * @param {Element} element Dom element
+ * @returns boolean
+ */
+function isVisible(element) {
+  return element.offsetWidth > 0 || element.offsetHeight > 0;
+}
+
 document.addEventListener("DOMContentLoaded", function () {
   scrollToActiveItem();
   enableCollapsibles();
@@ -10,10 +19,43 @@ function enableCollapsibles() {
       e.preventDefault();
       const list = button.parentElement.parentElement;
       if (list) {
-        list.classList.toggle("open")
+        list.classList.toggle("open");
       }
     });
   });
+
+  const isCached = "{{- site.Params.page.sidebar.cache | default false -}}" === "true";
+  const currentPagePath = window.location.href;
+
+  if (isCached) {
+    // find the current page in the sidebar and open the parent lists
+    const sidebar = document.querySelector(".hextra-sidebar-container");
+    if (sidebar) {
+      // find a tags and compare href with current page path
+      const links = sidebar.querySelectorAll("a");
+      links.forEach(function (link) {
+        const linkPath = link.href;
+
+        if (currentPagePath === linkPath) {
+          // add active class to the link
+          link.classList.add("active");
+          link.classList.remove("inactive");
+
+          if (!isVisible(link)) {
+            return;
+          }
+          // recursively open parent lists
+          let parent = link.parentElement;
+          while (parent && !parent.classList.contains("hextra-sidebar-container")) {
+            if (parent.tagName === "LI" && parent.classList.contains("hextra-sidebar-item")) {
+              parent.classList.add("open");
+            }
+            parent = parent.parentElement;
+          }
+        }
+      });
+    }
+  }
 }
 
 function scrollToActiveItem() {
@@ -31,6 +73,6 @@ function scrollToActiveItem() {
   const yDistance = visibleActiveItem.getBoundingClientRect().top - sidebarScrollbar.getBoundingClientRect().top;
   sidebarScrollbar.scrollTo({
     behavior: "instant",
-    top: yDistance - yOffset
+    top: yDistance - yOffset,
   });
 }

layouts/partials/components/sidebar/bottom.html

@@ -0,0 +1,12 @@
+{{- range site.Menus.sidebar }}
+  {{- $name := or (T .Identifier) .Name }}
+  {{- if eq .Params.type "separator" }}
+    <li class="[word-break:break-word] hx-mt-5 hx-mb-2 hx-px-2 hx-py-1.5 hx-text-sm hx-font-semibold hx-text-gray-900 first:hx-mt-0 dark:hx-text-gray-100">
+      <span class="hx-cursor-default">{{ $name }}</span>
+    </li>
+  {{- else }}
+    <li>
+      {{- partial "components/sidebar/item-link" (dict "active" false "title" $name "link" (.URL | relLangURL)) -}}
+    </li>
+  {{- end }}
+{{- end -}}

layouts/partials/components/sidebar/collapsible-button.html

@@ -0,0 +1,5 @@
+<span class="hextra-sidebar-collapsible-button">
+  <svg fill="none" viewBox="0 0 24 24" stroke="currentColor" class="hx-h-[18px] hx-min-w-[18px] hx-rounded-sm hx-p-0.5 hover:hx-bg-gray-800/5 dark:hover:hx-bg-gray-100/5">
+    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7" class="hx-origin-center hx-transition-transform rtl:-hx-rotate-180"></path>
+  </svg>
+</span>

layouts/partials/components/sidebar/generate-section-data.html

@@ -0,0 +1,51 @@
+{{- $context := . -}}
+
+{{- $pages := union .RegularPages .Sections -}}
+{{- $pages = where $pages "Params.sidebar.exclude" "!=" true -}}
+
+{{- $data := slice -}}
+
+{{- range $pages.ByWeight -}}
+  {{ $structure := (partial "sidebar/section-walk" .) | unmarshal -}}
+  {{ $data = $data | append $structure -}}
+{{ end -}}
+
+{{- define "partials/sidebar/section-walk" -}}
+  {{- with . -}}
+  {
+    "title": "{{ partial "utils/title" . }}",
+    "link": "{{ .RelPermalink }}",
+    "toc": {{ partial "sidebar/section-page-toc" . }},
+    "open": {{ .Params.sidebar.open | default false }}
+    {{- if .IsSection }},
+    "items": [
+      {{ $pages := union .RegularPages .Sections -}}
+      {{ $pages = where $pages "Params.sidebar.exclude" "!=" true -}}
+      {{ range $index, $page := $pages.ByWeight -}}
+        {{ partial "sidebar/section-walk" . }}{{ if not (ge $index (sub (len $pages) 1)) }},{{ end -}}
+      {{ end -}}
+    ]
+    {{ end -}}
+  }
+  {{- end }}
+{{- end -}}
+
+{{- define "partials/sidebar/section-page-toc" -}}
+  {{/* Get level 2 headings list used mainly for mobile navigation */}}
+  [
+    {{- with .Fragments.Headings -}}
+      {{/* Loop over level 1 headings */}}
+      {{- range . }}
+        {{- with .Headings }}
+          {{ $headings := . }}
+          {{- range $index, $heading := $headings }}
+            {{ $heading.Title | jsonify (dict "noHTMLEscape" true) }}
+            {{- if not (ge $index (sub (len $headings) 1)) }},{{ end -}}
+          {{ end -}}
+        {{- end -}}
+      {{ end -}}
+    {{- end -}}
+  ]
+{{- end -}}
+
+{{ return ($data | jsonify (dict "noHTMLEscape" true)) }}

layouts/partials/components/sidebar/get-section-data.html

@@ -0,0 +1,20 @@
+{{/* Get section sidebar config from Hugo `data` directory
+
+  If the site is multilingual, the sidebar data is stored in a language-specific
+  directory. For example, the English sidebar data is stored in `data/en/sidebar.yaml`.
+*/}}
+{{ $data := "" }}
+{{ $section := .Section | default "index" }}
+{{ $filename := "sidebar" }}
+
+{{ if hugo.IsMultilingual }}
+  {{ with (index site.Data site.Language.Lang $filename $section) }}
+    {{ $data = . }}
+  {{ end }}
+{{ else }}
+  {{ with (index site.Data $filename $section) }}
+    {{ $data = . }}
+  {{ end }}
+{{ end }}
+
+{{ return $data }}

layouts/partials/components/sidebar/item-link.html

@@ -0,0 +1,18 @@
+{{- $external := strings.HasPrefix .link "http" -}}
+
+{{- $activeClass := cond (.active) "active" "inactive" -}}
+
+
+<a
+  class="hextra-sidebar-item-link {{ $activeClass }} [-webkit-tap-highlight-color:transparent] [-webkit-touch-callout:none] [word-break:break-word]"
+  href="{{ .link }}"
+  {{ if $external }}target="_blank" rel="noreferer"{{ end }}
+>
+  {{- .title -}}
+  {{- with .context }}
+    {{- if or .RegularPages .Sections }}
+      {{- partialCached "components/sidebar/collapsible-button" . }}
+    {{- end }}
+  {{ end -}}
+  {{- with .items }}{{- partialCached "components/sidebar/collapsible-button" site.Home }}{{ end -}}
+</a>

layouts/partials/components/sidebar/render-data.html

@@ -0,0 +1,16 @@
+{{- $page := .page -}}
+{{- $pageLink :=  $page.RelPermalink -}}
+{{- $cached := .cached | default false }}
+
+{{- range .data -}}
+  {{- $active := and (not $cached) (or (eq $pageLink .link) (eq (strings.TrimSuffix "/" $pageLink) .link)) -}}
+  {{- $containsPage := hasPrefix $pageLink .link -}}
+  {{- $shouldOpen := or (.open) $containsPage $active | default false -}}
+
+  <li class="hextra-sidebar-item {{ if $shouldOpen }}open{{ end }}">
+    {{- partial "components/sidebar/item-link" (dict "active" $active "title" .title "link" .link "items" .items) -}}
+    {{- if .items -}}
+      {{- partial "components/sidebar/render-items" (dict "items" .items "link" $pageLink "cached" $cached) -}}
+    {{- end -}}
+  </li>
+{{ end }}

layouts/partials/components/sidebar/render-items.html

@@ -0,0 +1,21 @@
+{{- $items := .items -}}
+{{- $pageLink := .link -}}
+{{- $cached := .cached | default false }}
+
+
+<div class="ltr:hx-pr-0 hx-overflow-hidden">
+  <ul class="hextra-sidebar-item-list">
+    {{- range $items }}
+      {{- $active := and (not $cached) (or (eq $pageLink .link) (eq (strings.TrimSuffix "/" $pageLink) .link)) -}}
+      {{- $containsPage := hasPrefix $pageLink .link -}}
+      {{- $shouldOpen := or (.open) $containsPage $active | default false -}}
+
+      <li class="hextra-sidebar-item hx-flex hx-flex-col {{ if $shouldOpen }}open{{ end }}">
+        {{- partial "components/sidebar/item-link" (dict "active" $active "title" .title "link" .link "items" .items) -}}
+        {{- if .items -}}
+          {{- partial "components/sidebar/render-items" (dict "items" .items "link" $pageLink "cached" $cached) -}}
+        {{- end -}}
+      </li>
+    {{- end -}}
+  </ul>
+</div>

layouts/partials/scripts.html

@@ -4,7 +4,7 @@
 {{- $jsLang := resources.Get "js/lang.js" -}}
 {{- $jsCodeCopy := resources.Get "js/code-copy.js" -}}
 {{- $jsFileTree := resources.Get "js/filetree.js" -}}
-{{- $jsSidebar := resources.Get "js/sidebar.js" -}}
+{{- $jsSidebar := resources.Get "js/sidebar.js" | resources.ExecuteAsTemplate "sidebar.js" . -}}
 {{- $jsBackToTop := resources.Get "js/back-to-top.js" -}}
 
 {{- $scripts := slice $jsTheme $jsMenu $jsCodeCopy $jsTabs $jsLang $jsFileTree $jsSidebar $jsBackToTop | resources.Concat "js/main.js" -}}

layouts/partials/sidebar-ng.html

@@ -0,0 +1,95 @@
+{{- $context := .context -}}
+
+{{- $disableSidebar := .disableSidebar | default false -}}
+{{- $displayPlaceholder := .displayPlaceholder | default false -}}
+
+{{- $sidebarClass := cond $disableSidebar (cond $displayPlaceholder "md:hx-hidden xl:hx-block" "md:hx-hidden") "md:hx-sticky" -}}
+
+{{- $navRoot := cond (eq site.Home.Type "docs") site.Home $context.FirstSection -}}
+{{- $pageURL := $context.RelPermalink -}}
+
+{{- $data := slice -}}
+{{- $dataMobile := slice -}}
+
+{{- if (eq site.Params.page.sidebar.source "data") -}}
+  {{ $data = partialCached "components/sidebar/get-section-data" $context $context.Section }}
+  {{- $dataMobile = $data -}}
+{{- else -}}
+  {{- $data = (partialCached "components/sidebar/generate-section-data" $navRoot $navRoot) | unmarshal -}}
+  {{- $dataMobile = (partialCached "components/sidebar/generate-section-data" site.Home site.Home) | unmarshal -}}
+{{- end -}}
+
+{{- $shouldCache := site.Params.page.sidebar.cache | default false -}}
+
+{{/* EXPERIMENTAL */}}
+{{- if .context.Params.sidebar.hide -}}
+  {{- $disableSidebar = true -}}
+  {{- $displayPlaceholder = true -}}
+{{- end -}}
+
+<div class="mobile-menu-overlay [transition:background-color_1.5s_ease] hx-fixed hx-inset-0 hx-z-10 hx-bg-black/80 dark:hx-bg-black/60 hx-hidden"></div>
+
+<aside class="hextra-sidebar-container hx-flex hx-flex-col print:hx-hidden md:hx-top-16 md:hx-shrink-0 md:hx-w-64 md:hx-self-start max-md:[transform:translate3d(0,-100%,0)] {{ $sidebarClass }}">
+  {{/* Search bar on small screen */}}
+  {{- partialCached "components/sidebar/mobile-search" . -}}
+
+
+  <div class="hextra-scrollbar hx-overflow-y-auto hx-overflow-x-hidden hx-p-4 hx-grow md:hx-h-[calc(100vh-var(--navbar-height)-var(--menu-height))]">
+    {{/* Mobile Navigation */}}
+    <ul class="hx-flex hx-flex-col hx-gap-1 md:hx-hidden">
+      {{- with $dataMobile -}}
+        {{- partial "components/sidebar/render-data" (dict "data" . "page" $context) -}}
+      {{- end -}}
+    </ul>
+
+    {{/* Sidebar on large screen */}}
+    {{- if $disableSidebar -}}
+      {{- if $displayPlaceholder }}<div class="max-xl:hx-hidden hx-h-0 hx-w-64 hx-shrink-0"></div>{{ end -}}
+      {{ .context.Scratch.Set "enableFooterSwitches" true }}
+    {{- else -}}
+      <ul class="hx-flex hx-flex-col hx-gap-1 max-md:hx-hidden">
+        {{- with $data -}}
+          {{- if $shouldCache -}}
+            {{- partialCached "components/sidebar/render-data" (dict "data" . "page" $context "cached" $shouldCache) $navRoot -}}
+          {{- else -}}
+            {{- partial "components/sidebar/render-data" (dict "data" . "page" $context "cached" $shouldCache) -}}
+          {{- end -}}
+        {{- end -}}
+        {{- partialCached "components/sidebar/bottom" $context site.Home -}}
+      </ul>
+    {{ end -}}
+  </div>
+  {{- partial "components/sidebar/switches" (dict "context" $context "disableSidebar" $disableSidebar) -}}
+</aside>
+
+{{- define "partials/components/sidebar/mobile-search" -}}
+  <div class="hx-px-4 hx-pt-4 md:hx-hidden">
+    {{- partialCached "search.html" . -}}
+  </div>
+{{- end -}}
+
+{{- define "partials/components/sidebar/switches" -}}
+  {{- $context := .context -}}
+  {{- $disableSidebar := .disableSidebar -}}
+  {{/* Hide theme switch when sidebar is disabled */}}
+  {{ $switchesClass := cond $disableSidebar "md:hx-hidden" "" -}}
+  {{ $displayThemeToggle := (site.Params.theme.displayToggle | default true) -}}
+
+  {{ if or site.IsMultiLingual $displayThemeToggle }}
+    <div
+      class="{{ $switchesClass }} {{ with site.IsMultiLingual }}
+        hx-justify-end
+      {{ end }} hx-sticky hx-bottom-0 hx-bg-white dark:hx-bg-dark hx-mx-4 hx-py-4 hx-shadow-[0_-12px_16px_#fff] hx-flex hx-items-center hx-gap-2 dark:hx-border-neutral-800 dark:hx-shadow-[0_-12px_16px_#111] contrast-more:hx-border-neutral-400 contrast-more:hx-shadow-none contrast-more:dark:hx-shadow-none hx-border-t"
+      data-toggle-animation="show"
+    >
+      {{- with site.IsMultiLingual -}}
+        {{- partial "language-switch" (dict "context" $context "grow" true) -}}
+        {{- with $displayThemeToggle }}{{ partial "theme-toggle" (dict "hideLabel" true) }}{{ end -}}
+      {{- else -}}
+        {{- with $displayThemeToggle -}}
+          <div class="hx-flex hx-grow hx-flex-col">{{ partial "theme-toggle" }}</div>
+        {{- end -}}
+      {{- end -}}
+    </div>
+  {{- end -}}
+{{- end -}}