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node_modules/vitepress/dist/client/app/router.js

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+import { inject, markRaw, nextTick, reactive, readonly } from 'vue';
+import { notFoundPageData, treatAsHtml } from '../shared';
+import { siteDataRef } from './data';
+import { getScrollOffset, inBrowser, withBase } from './utils';
+export const RouterSymbol = Symbol();
+// we are just using URL to parse the pathname and hash - the base doesn't
+// matter and is only passed to support same-host hrefs.
+const fakeHost = 'http://a.com';
+const getDefaultRoute = () => ({
+    path: '/',
+    component: null,
+    data: notFoundPageData
+});
+export function createRouter(loadPageModule, fallbackComponent) {
+    const route = reactive(getDefaultRoute());
+    const router = {
+        route,
+        go
+    };
+    async function go(href = inBrowser ? location.href : '/') {
+        href = normalizeHref(href);
+        if ((await router.onBeforeRouteChange?.(href)) === false)
+            return;
+        if (inBrowser && href !== normalizeHref(location.href)) {
+            // save scroll position before changing url
+            history.replaceState({ scrollPosition: window.scrollY }, '');
+            history.pushState({}, '', href);
+        }
+        await loadPage(href);
+        await (router.onAfterRouteChange ?? router.onAfterRouteChanged)?.(href);
+    }
+    let latestPendingPath = null;
+    async function loadPage(href, scrollPosition = 0, isRetry = false) {
+        if ((await router.onBeforePageLoad?.(href)) === false)
+            return;
+        const targetLoc = new URL(href, fakeHost);
+        const pendingPath = (latestPendingPath = targetLoc.pathname);
+        try {
+            let page = await loadPageModule(pendingPath);
+            if (!page) {
+                throw new Error(`Page not found: ${pendingPath}`);
+            }
+            if (latestPendingPath === pendingPath) {
+                latestPendingPath = null;
+                const { default: comp, __pageData } = page;
+                if (!comp) {
+                    throw new Error(`Invalid route component: ${comp}`);
+                }
+                await router.onAfterPageLoad?.(href);
+                route.path = inBrowser ? pendingPath : withBase(pendingPath);
+                route.component = markRaw(comp);
+                route.data = import.meta.env.PROD
+                    ? markRaw(__pageData)
+                    : readonly(__pageData);
+                if (inBrowser) {
+                    nextTick(() => {
+                        let actualPathname = siteDataRef.value.base +
+                            __pageData.relativePath.replace(/(?:(^|\/)index)?\.md$/, '$1');
+                        if (!siteDataRef.value.cleanUrls && !actualPathname.endsWith('/')) {
+                            actualPathname += '.html';
+                        }
+                        if (actualPathname !== targetLoc.pathname) {
+                            targetLoc.pathname = actualPathname;
+                            href = actualPathname + targetLoc.search + targetLoc.hash;
+                            history.replaceState({}, '', href);
+                        }
+                        if (targetLoc.hash && !scrollPosition) {
+                            let target = null;
+                            try {
+                                target = document.getElementById(decodeURIComponent(targetLoc.hash).slice(1));
+                            }
+                            catch (e) {
+                                console.warn(e);
+                            }
+                            if (target) {
+                                scrollTo(target, targetLoc.hash);
+                                return;
+                            }
+                        }
+                        window.scrollTo(0, scrollPosition);
+                    });
+                }
+            }
+        }
+        catch (err) {
+            if (!/fetch|Page not found/.test(err.message) &&
+                !/^\/404(\.html|\/)?$/.test(href)) {
+                console.error(err);
+            }
+            // retry on fetch fail: the page to hash map may have been invalidated
+            // because a new deploy happened while the page is open. Try to fetch
+            // the updated pageToHash map and fetch again.
+            if (!isRetry) {
+                try {
+                    const res = await fetch(siteDataRef.value.base + 'hashmap.json');
+                    window.__VP_HASH_MAP__ = await res.json();
+                    await loadPage(href, scrollPosition, true);
+                    return;
+                }
+                catch (e) { }
+            }
+            if (latestPendingPath === pendingPath) {
+                latestPendingPath = null;
+                route.path = inBrowser ? pendingPath : withBase(pendingPath);
+                route.component = fallbackComponent ? markRaw(fallbackComponent) : null;
+                const relativePath = inBrowser
+                    ? pendingPath
+                        .replace(/(^|\/)$/, '$1index')
+                        .replace(/(\.html)?$/, '.md')
+                        .replace(/^\//, '')
+                    : '404.md';
+                route.data = { ...notFoundPageData, relativePath };
+            }
+        }
+    }
+    if (inBrowser) {
+        if (history.state === null) {
+            history.replaceState({}, '');
+        }
+        window.addEventListener('click', (e) => {
+            if (e.defaultPrevented ||
+                !(e.target instanceof Element) ||
+                e.target.closest('button') || // temporary fix for docsearch action buttons
+                e.button !== 0 ||
+                e.ctrlKey ||
+                e.shiftKey ||
+                e.altKey ||
+                e.metaKey)
+                return;
+            const link = e.target.closest('a');
+            if (!link ||
+                link.closest('.vp-raw') ||
+                link.hasAttribute('download') ||
+                link.hasAttribute('target'))
+                return;
+            const linkHref = link.getAttribute('href') ??
+                (link instanceof SVGAElement ? link.getAttribute('xlink:href') : null);
+            if (linkHref == null)
+                return;
+            const { href, origin, pathname, hash, search } = new URL(linkHref, link.baseURI);
+            const currentUrl = new URL(location.href); // copy to keep old data
+            // only intercept inbound html links
+            if (origin === currentUrl.origin && treatAsHtml(pathname)) {
+                e.preventDefault();
+                if (pathname === currentUrl.pathname &&
+                    search === currentUrl.search) {
+                    // scroll between hash anchors in the same page
+                    // avoid duplicate history entries when the hash is same
+                    if (hash !== currentUrl.hash) {
+                        history.pushState({}, '', href);
+                        // still emit the event so we can listen to it in themes
+                        window.dispatchEvent(new HashChangeEvent('hashchange', {
+                            oldURL: currentUrl.href,
+                            newURL: href
+                        }));
+                    }
+                    if (hash) {
+                        // use smooth scroll when clicking on header anchor links
+                        scrollTo(link, hash, link.classList.contains('header-anchor'));
+                    }
+                    else {
+                        window.scrollTo(0, 0);
+                    }
+                }
+                else {
+                    go(href);
+                }
+            }
+        }, { capture: true });
+        window.addEventListener('popstate', async (e) => {
+            if (e.state === null)
+                return;
+            const href = normalizeHref(location.href);
+            await loadPage(href, (e.state && e.state.scrollPosition) || 0);
+            await (router.onAfterRouteChange ?? router.onAfterRouteChanged)?.(href);
+        });
+        window.addEventListener('hashchange', (e) => {
+            e.preventDefault();
+        });
+    }
+    handleHMR(route);
+    return router;
+}
+export function useRouter() {
+    const router = inject(RouterSymbol);
+    if (!router) {
+        throw new Error('useRouter() is called without provider.');
+    }
+    return router;
+}
+export function useRoute() {
+    return useRouter().route;
+}
+export function scrollTo(el, hash, smooth = false) {
+    let target = null;
+    try {
+        target = el.classList.contains('header-anchor')
+            ? el
+            : document.getElementById(decodeURIComponent(hash).slice(1));
+    }
+    catch (e) {
+        console.warn(e);
+    }
+    if (target) {
+        const targetPadding = parseInt(window.getComputedStyle(target).paddingTop, 10);
+        const targetTop = window.scrollY +
+            target.getBoundingClientRect().top -
+            getScrollOffset() +
+            targetPadding;
+        function scrollToTarget() {
+            // only smooth scroll if distance is smaller than screen height.
+            if (!smooth || Math.abs(targetTop - window.scrollY) > window.innerHeight)
+                window.scrollTo(0, targetTop);
+            else
+                window.scrollTo({ left: 0, top: targetTop, behavior: 'smooth' });
+        }
+        requestAnimationFrame(scrollToTarget);
+    }
+}
+function handleHMR(route) {
+    // update route.data on HMR updates of active page
+    if (import.meta.hot) {
+        // hot reload pageData
+        import.meta.hot.on('vitepress:pageData', (payload) => {
+            if (shouldHotReload(payload)) {
+                route.data = payload.pageData;
+            }
+        });
+    }
+}
+function shouldHotReload(payload) {
+    const payloadPath = payload.path.replace(/(?:(^|\/)index)?\.md$/, '$1');
+    const locationPath = location.pathname
+        .replace(/(?:(^|\/)index)?\.html$/, '')
+        .slice(siteDataRef.value.base.length - 1);
+    return payloadPath === locationPath;
+}
+function normalizeHref(href) {
+    const url = new URL(href, fakeHost);
+    url.pathname = url.pathname.replace(/(^|\/)index(\.html)?$/, '$1');
+    // ensure correct deep link so page refresh lands on correct files.
+    if (siteDataRef.value.cleanUrls)
+        url.pathname = url.pathname.replace(/\.html$/, '');
+    else if (!url.pathname.endsWith('/') && !url.pathname.endsWith('.html'))
+        url.pathname += '.html';
+    return url.pathname + url.search + url.hash;
+}