Initial commit.

themes/blowfish/layouts/partials/toc.html

@@ -0,0 +1,107 @@
+<details
+  open
+  id="TOCView"
+  class="toc-right mt-0 overflow-y-auto overscroll-contain scrollbar-thin scrollbar-track-neutral-200 scrollbar-thumb-neutral-400 dark:scrollbar-track-neutral-800 dark:scrollbar-thumb-neutral-600 rounded-lg ltr:-ml-5 ltr:pl-5 rtl:-mr-5 rtl:pr-5 hidden lg:block">
+  <summary
+    class="block py-1 text-lg font-semibold cursor-pointer bg-neutral-100 text-neutral-800 ltr:-ml-5 ltr:pl-5 rtl:-mr-5 rtl:pr-5 dark:bg-neutral-700 dark:text-neutral-100 lg:hidden">
+    {{ i18n "article.table_of_contents" }}
+  </summary>
+  <div
+    class="min-w-[220px] py-2 border-dotted ltr:-ml-5 ltr:border-l ltr:pl-5 rtl:-mr-5 rtl:border-r rtl:pr-5 dark:border-neutral-600">
+    {{ .TableOfContents | emojify }}
+  </div>
+</details>
+<details class="toc-inside mt-0 overflow-hidden rounded-lg ltr:-ml-5 ltr:pl-5 rtl:-mr-5 rtl:pr-5 lg:hidden">
+  <summary
+    class="py-1 text-lg font-semibold cursor-pointer bg-neutral-100 text-neutral-800 ltr:-ml-5 ltr:pl-5 rtl:-mr-5 rtl:pr-5 dark:bg-neutral-700 dark:text-neutral-100 lg:hidden">
+    {{ i18n "article.table_of_contents" }}
+  </summary>
+  <div
+    class="py-2 border-dotted border-neutral-300 ltr:-ml-5 ltr:border-l ltr:pl-5 rtl:-mr-5 rtl:border-r rtl:pr-5 dark:border-neutral-600">
+    {{ .TableOfContents | emojify }}
+  </div>
+</details>
+
+{{ if .Site.Params.smartTOC }}
+<script>
+  (function () {
+    'use strict'
+
+    const SCROLL_OFFSET_RATIO = 0.33
+    const TOC_SELECTOR = '#TableOfContents'
+    const ANCHOR_SELECTOR = '.anchor'
+    const TOC_LINK_SELECTOR = 'a[href^="#"]'
+    const NESTED_LIST_SELECTOR = 'li ul'
+    const ACTIVE_CLASS = 'active'
+
+    function getActiveAnchorId(anchors, offsetRatio) {
+      const threshold = window.scrollY + window.innerHeight * offsetRatio
+      const tocLinks = [...document.querySelectorAll('#TableOfContents a[href^="#"]')]
+      const tocIds = new Set(tocLinks.map(link => link.getAttribute('href').substring(1)))
+
+      for (let i = anchors.length - 1; i >= 0; i--) {
+        const top = anchors[i].getBoundingClientRect().top + window.scrollY
+        if (top <= threshold && tocIds.has(anchors[i].id)) {
+          return anchors[i].id
+        }
+      }
+      return anchors.find(anchor => tocIds.has(anchor.id))?.id || ''
+    }
+
+    function updateTOC({ toc, anchors, links, scrollOffset, collapseInactive }) {
+      const activeId = getActiveAnchorId(anchors, scrollOffset)
+      if (!activeId) return
+
+      links.forEach(link => {
+        const isActive = link.getAttribute('href') === `#${activeId}`
+        link.classList.toggle(ACTIVE_CLASS, isActive)
+
+        if (collapseInactive) {
+          const ul = link.closest('li')?.querySelector('ul')
+          if (ul) ul.style.display = isActive ? '' : 'none'
+        }
+      })
+
+      if (collapseInactive) {
+        const activeLink = toc.querySelector(`a[href="#${CSS.escape(activeId)}"]`)
+        let el = activeLink
+        while (el && el !== toc) {
+          if (el.tagName === 'UL') el.style.display = ''
+          if (el.tagName === 'LI') el.querySelector('ul')?.style.setProperty('display', '')
+          el = el.parentElement
+        }
+      }
+    }
+
+    function initTOC() {
+      const toc = document.querySelector(TOC_SELECTOR)
+      if (!toc) return
+
+      const collapseInactive = {{ if site.Params.smartTOCHideUnfocusedChildren }}true{{ else }}false{{ end }}
+      const anchors = [...document.querySelectorAll(ANCHOR_SELECTOR)]
+      const links = [...toc.querySelectorAll(TOC_LINK_SELECTOR)]
+
+      if (collapseInactive) {
+        toc.querySelectorAll(NESTED_LIST_SELECTOR).forEach(ul => ul.style.display = 'none')
+      }
+
+      const config = {
+        toc,
+        anchors,
+        links,
+        scrollOffset: SCROLL_OFFSET_RATIO,
+        collapseInactive
+      }
+
+      window.addEventListener('scroll', () => updateTOC(config), { passive: true })
+      window.addEventListener('hashchange', () => updateTOC(config), { passive: true })
+
+      updateTOC(config)
+    }
+
+    document.readyState === 'loading'
+      ? document.addEventListener('DOMContentLoaded', initTOC)
+      : initTOC()
+  })()
+</script>
+{{ end }}