| | |
| | | import { computePosition, inline, shift, autoPlacement } from "@floating-ui/dom" |
| | | import { computePosition, flip, inline, shift } from "@floating-ui/dom" |
| | | import { normalizeRelativeURLs } from "../../util/path" |
| | | |
| | | const p = new DOMParser() |
| | | async function mouseEnterHandler( |
| | | this: HTMLLinkElement, |
| | | { clientX, clientY }: { clientX: number; clientY: number }, |
| | | ) { |
| | | const link = this |
| | | if (link.dataset.noPopover === "true") { |
| | | return |
| | | } |
| | | |
| | | async function setPosition(popoverElement: HTMLElement) { |
| | | const { x, y } = await computePosition(link, popoverElement, { |
| | | middleware: [inline({ x: clientX, y: clientY }), shift(), flip()], |
| | | }) |
| | | Object.assign(popoverElement.style, { |
| | | left: `${x}px`, |
| | | top: `${y}px`, |
| | | }) |
| | | } |
| | | |
| | | const hasAlreadyBeenFetched = () => |
| | | [...link.children].some((child) => child.classList.contains("popover")) |
| | | |
| | | // dont refetch if there's already a popover |
| | | if (hasAlreadyBeenFetched()) { |
| | | return setPosition(link.lastChild as HTMLElement) |
| | | } |
| | | |
| | | const thisUrl = new URL(document.location.href) |
| | | thisUrl.hash = "" |
| | | thisUrl.search = "" |
| | | const targetUrl = new URL(link.href) |
| | | const hash = targetUrl.hash |
| | | targetUrl.hash = "" |
| | | targetUrl.search = "" |
| | | |
| | | const contents = await fetch(`${targetUrl}`) |
| | | .then((res) => res.text()) |
| | | .catch((err) => { |
| | | console.error(err) |
| | | }) |
| | | |
| | | // bailout if another popover exists |
| | | if (hasAlreadyBeenFetched()) { |
| | | return |
| | | } |
| | | |
| | | if (!contents) return |
| | | const html = p.parseFromString(contents, "text/html") |
| | | normalizeRelativeURLs(html, targetUrl) |
| | | const elts = [...html.getElementsByClassName("popover-hint")] |
| | | if (elts.length === 0) return |
| | | |
| | | const popoverElement = document.createElement("div") |
| | | popoverElement.classList.add("popover") |
| | | const popoverInner = document.createElement("div") |
| | | popoverInner.classList.add("popover-inner") |
| | | popoverElement.appendChild(popoverInner) |
| | | elts.forEach((elt) => popoverInner.appendChild(elt)) |
| | | |
| | | setPosition(popoverElement) |
| | | link.appendChild(popoverElement) |
| | | |
| | | if (hash !== "") { |
| | | const heading = popoverInner.querySelector(hash) as HTMLElement | null |
| | | if (heading) { |
| | | // leave ~12px of buffer when scrolling to a heading |
| | | popoverInner.scroll({ top: heading.offsetTop - 12, behavior: "instant" }) |
| | | } |
| | | } |
| | | } |
| | | |
| | | document.addEventListener("nav", () => { |
| | | const links = [...document.getElementsByClassName("internal")] as HTMLLinkElement[] |
| | | const p = new DOMParser() |
| | | for (const link of links) { |
| | | link.addEventListener("mouseenter", async ({ clientX, clientY }) => { |
| | | if (link.dataset.fetchedPopover === "true") return |
| | | const url = link.href |
| | | const contents = await fetch(`${url}`) |
| | | .then((res) => res.text()) |
| | | .catch((err) => { |
| | | console.error(err) |
| | | }) |
| | | if (!contents) return |
| | | const html = p.parseFromString(contents, "text/html") |
| | | const elts = [...html.getElementsByClassName("popover-hint")] |
| | | if (elts.length === 0) return |
| | | |
| | | |
| | | const popoverElement = document.createElement("div") |
| | | popoverElement.classList.add("popover") |
| | | elts.forEach(elt => popoverElement.appendChild(elt)) |
| | | |
| | | const { x, y } = await computePosition(link, popoverElement, { |
| | | middleware: [inline({ |
| | | x: clientX, |
| | | y: clientY |
| | | }), shift(), autoPlacement()] |
| | | }) |
| | | |
| | | Object.assign(popoverElement.style, { |
| | | left: `${x}px`, |
| | | top: `${y}px`, |
| | | }) |
| | | |
| | | link.appendChild(popoverElement) |
| | | link.dataset.fetchedPopover = "true" |
| | | }) |
| | | link.addEventListener("mouseenter", mouseEnterHandler) |
| | | window.addCleanup(() => link.removeEventListener("mouseenter", mouseEnterHandler)) |
| | | } |
| | | }) |