Initial commit

quartz/components/scripts/popover.inline.ts

@@ -0,0 +1,133 @@
+import { computePosition, flip, inline, shift } from "@floating-ui/dom"
+import { normalizeRelativeURLs } from "../../util/path"
+import { fetchCanonical } from "./util"
+
+const p = new DOMParser()
+let activeAnchor: HTMLAnchorElement | null = null
+
+async function mouseEnterHandler(
+  this: HTMLAnchorElement,
+  { clientX, clientY }: { clientX: number; clientY: number },
+) {
+  const link = (activeAnchor = this)
+  if (link.dataset.noPopover === "true") {
+    return
+  }
+
+  async function setPosition(popoverElement: HTMLElement) {
+    const { x, y } = await computePosition(link, popoverElement, {
+      strategy: "fixed",
+      middleware: [inline({ x: clientX, y: clientY }), shift(), flip()],
+    })
+    Object.assign(popoverElement.style, {
+      transform: `translate(${x.toFixed()}px, ${y.toFixed()}px)`,
+    })
+  }
+
+  function showPopover(popoverElement: HTMLElement) {
+    clearActivePopover()
+    popoverElement.classList.add("active-popover")
+    setPosition(popoverElement as HTMLElement)
+
+    if (hash !== "") {
+      const targetAnchor = `#popover-internal-${hash.slice(1)}`
+      const heading = popoverInner.querySelector(targetAnchor) as HTMLElement | null
+      if (heading) {
+        // leave ~12px of buffer when scrolling to a heading
+        popoverInner.scroll({ top: heading.offsetTop - 12, behavior: "instant" })
+      }
+    }
+  }
+
+  const targetUrl = new URL(link.href)
+  const hash = decodeURIComponent(targetUrl.hash)
+  targetUrl.hash = ""
+  targetUrl.search = ""
+  const popoverId = `popover-${link.pathname}`
+  const prevPopoverElement = document.getElementById(popoverId)
+
+  // dont refetch if there's already a popover
+  if (!!document.getElementById(popoverId)) {
+    showPopover(prevPopoverElement as HTMLElement)
+    return
+  }
+
+  const response = await fetchCanonical(targetUrl).catch((err) => {
+    console.error(err)
+  })
+
+  if (!response) return
+  const [contentType] = response.headers.get("Content-Type")!.split(";")
+  const [contentTypeCategory, typeInfo] = contentType.split("/")
+
+  const popoverElement = document.createElement("div")
+  popoverElement.id = popoverId
+  popoverElement.classList.add("popover")
+  const popoverInner = document.createElement("div")
+  popoverInner.classList.add("popover-inner")
+  popoverInner.dataset.contentType = contentType ?? undefined
+  popoverElement.appendChild(popoverInner)
+
+  switch (contentTypeCategory) {
+    case "image":
+      const img = document.createElement("img")
+      img.src = targetUrl.toString()
+      img.alt = targetUrl.pathname
+
+      popoverInner.appendChild(img)
+      break
+    case "application":
+      switch (typeInfo) {
+        case "pdf":
+          const pdf = document.createElement("iframe")
+          pdf.src = targetUrl.toString()
+          popoverInner.appendChild(pdf)
+          break
+        default:
+          break
+      }
+      break
+    default:
+      const contents = await response.text()
+      const html = p.parseFromString(contents, "text/html")
+      normalizeRelativeURLs(html, targetUrl)
+      // prepend all IDs inside popovers to prevent duplicates
+      html.querySelectorAll("[id]").forEach((el) => {
+        const targetID = `popover-internal-${el.id}`
+        el.id = targetID
+      })
+      const elts = [...html.getElementsByClassName("popover-hint")]
+      if (elts.length === 0) return
+
+      elts.forEach((elt) => popoverInner.appendChild(elt))
+  }
+
+  if (!!document.getElementById(popoverId)) {
+    return
+  }
+
+  document.body.appendChild(popoverElement)
+  if (activeAnchor !== this) {
+    return
+  }
+
+  showPopover(popoverElement)
+}
+
+function clearActivePopover() {
+  activeAnchor = null
+  const allPopoverElements = document.querySelectorAll(".popover")
+  allPopoverElements.forEach((popoverElement) => popoverElement.classList.remove("active-popover"))
+}
+
+document.addEventListener("nav", () => {
+  const links = [...document.querySelectorAll("a.internal")] as HTMLAnchorElement[]
+  for (const link of links) {
+    link.addEventListener("mouseenter", mouseEnterHandler)
+    link.addEventListener("mouseleave", clearActivePopover)
+    window.addCleanup(() => {
+      link.removeEventListener("mouseenter", mouseEnterHandler)
+      link.removeEventListener("mouseleave", clearActivePopover)
+    })
+  }
+})