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events.ts
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events.ts
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import { delegateEvents } from "solid-js/web";
import { onCleanup } from "solid-js";
import type { RouterContext } from "../types.js";
import { actions } from "./action.js";
import { mockBase } from "../utils.js";
export function setupNativeEvents(preload = true, explicitLinks = false, actionBase = "/_server") {
return (router: RouterContext) => {
const basePath = router.base.path();
const navigateFromRoute = router.navigatorFactory(router.base);
let preloadTimeout: Record<string, number> = {};
function isSvg<T extends SVGElement>(el: T | HTMLElement): el is T {
return el.namespaceURI === "http://www.w3.org/2000/svg";
}
function handleAnchor(evt: MouseEvent) {
if (
evt.defaultPrevented ||
evt.button !== 0 ||
evt.metaKey ||
evt.altKey ||
evt.ctrlKey ||
evt.shiftKey
)
return;
const a = evt
.composedPath()
.find(el => el instanceof Node && el.nodeName.toUpperCase() === "A") as
| HTMLAnchorElement
| SVGAElement
| undefined;
if (!a || (explicitLinks && !a.hasAttribute("link"))) return;
const svg = isSvg(a);
const href = svg ? a.href.baseVal : a.href;
const target = svg ? a.target.baseVal : a.target;
if (target || (!href && !a.hasAttribute("state"))) return;
const rel = (a.getAttribute("rel") || "").split(/\s+/);
if (a.hasAttribute("download") || (rel && rel.includes("external"))) return;
const url = svg ? new URL(href, document.baseURI) : new URL(href);
if (
url.origin !== window.location.origin ||
(basePath && url.pathname && !url.pathname.toLowerCase().startsWith(basePath.toLowerCase()))
)
return;
return [a, url] as const;
}
function handleAnchorClick(evt: Event) {
const res = handleAnchor(evt as MouseEvent);
if (!res) return;
const [a, url] = res;
const to = router.parsePath(url.pathname + url.search + url.hash);
const state = a.getAttribute("state");
evt.preventDefault();
navigateFromRoute(to, {
resolve: false,
replace: a.hasAttribute("replace"),
scroll: !a.hasAttribute("noscroll"),
state: state && JSON.parse(state)
});
}
function handleAnchorPreload(evt: Event) {
const res = handleAnchor(evt as MouseEvent);
if (!res) return;
const [a, url] = res;
if (!preloadTimeout[url.pathname])
router.preloadRoute(url, a.getAttribute("preload") !== "false");
}
function handleAnchorIn(evt: Event) {
const res = handleAnchor(evt as MouseEvent);
if (!res) return;
const [a, url] = res;
if (preloadTimeout[url.pathname]) return;
preloadTimeout[url.pathname] = setTimeout(() => {
router.preloadRoute(url, a.getAttribute("preload") !== "false");
delete preloadTimeout[url.pathname];
}, 200) as any;
}
function handleAnchorOut(evt: Event) {
const res = handleAnchor(evt as MouseEvent);
if (!res) return;
const [, url] = res;
if (preloadTimeout[url.pathname]) {
clearTimeout(preloadTimeout[url.pathname]);
delete preloadTimeout[url.pathname];
}
}
function handleFormSubmit(evt: SubmitEvent) {
let actionRef =
evt.submitter && evt.submitter.hasAttribute("formaction")
? evt.submitter.getAttribute("formaction")
: (evt.target as HTMLElement).getAttribute("action");
if (!actionRef) return;
if (!actionRef.startsWith("https://action/")) {
// normalize server actions
const url = new URL(actionRef, mockBase);
actionRef = router.parsePath(url.pathname + url.search);
if (!actionRef.startsWith(actionBase)) return;
}
if ((evt.target as HTMLFormElement).method.toUpperCase() !== "POST")
throw new Error("Only POST forms are supported for Actions");
const handler = actions.get(actionRef);
if (handler) {
evt.preventDefault();
const data = new FormData(evt.target as HTMLFormElement);
if (evt.submitter && (evt.submitter as HTMLButtonElement | HTMLInputElement).name)
data.append(
(evt.submitter as HTMLButtonElement | HTMLInputElement).name,
(evt.submitter as HTMLButtonElement | HTMLInputElement).value
);
handler.call(router, data);
}
}
// ensure delegated event run first
delegateEvents(["click", "submit"]);
document.addEventListener("click", handleAnchorClick);
if (preload) {
document.addEventListener("mouseover", handleAnchorIn);
document.addEventListener("mouseout", handleAnchorOut);
document.addEventListener("focusin", handleAnchorPreload);
document.addEventListener("touchstart", handleAnchorPreload);
}
document.addEventListener("submit", handleFormSubmit);
onCleanup(() => {
document.removeEventListener("click", handleAnchorClick);
if (preload) {
document.removeEventListener("mouseover", handleAnchorIn);
document.removeEventListener("mouseout", handleAnchorOut);
document.removeEventListener("focusin", handleAnchorPreload);
document.removeEventListener("touchstart", handleAnchorPreload);
}
document.removeEventListener("submit", handleFormSubmit);
});
};
}