import { computePosition, flip, inline, shift } from "@floating-ui/dom"
|
|
// from micromorph/src/utils.ts
|
// https://github.com/natemoo-re/micromorph/blob/main/src/utils.ts#L5
|
export function normalizeRelativeURLs(el: Element | Document, base: string | URL) {
|
const update = (el: Element, attr: string, base: string | URL) => {
|
el.setAttribute(attr, new URL(el.getAttribute(attr)!, base).pathname)
|
}
|
|
el.querySelectorAll('[href^="./"], [href^="../"]').forEach((item) => update(item, "href", base))
|
|
el.querySelectorAll('[src^="./"], [src^="../"]').forEach((item) => update(item, "src", base))
|
}
|
|
const p = new DOMParser()
|
async function mouseEnterHandler(
|
this: HTMLLinkElement,
|
{ clientX, clientY }: { clientX: number; clientY: number },
|
) {
|
const link = this
|
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`,
|
})
|
}
|
|
// dont refetch if there's already a popover
|
if ([...link.children].some((child) => child.classList.contains("popover"))) {
|
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 = ""
|
// prevent hover of the same page
|
if (thisUrl.toString() === targetUrl.toString()) return
|
|
const contents = await fetch(`${targetUrl}`)
|
.then((res) => res.text())
|
.catch((err) => {
|
console.error(err)
|
})
|
|
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[]
|
for (const link of links) {
|
link.removeEventListener("mouseenter", mouseEnterHandler)
|
link.addEventListener("mouseenter", mouseEnterHandler)
|
}
|
})
|
