vitepress
Version:
Vite & Vue powered static site generator
58 lines (57 loc) • 2.58 kB
JavaScript
import { computed } from 'vue';
import { useData } from './data';
import { isActive } from '../../shared';
import { getSidebar, getFlatSideBarLinks } from '../support/sidebar';
export function usePrevNext() {
const { page, theme, frontmatter } = useData();
return computed(() => {
const sidebar = getSidebar(theme.value.sidebar, page.value.relativePath);
const links = getFlatSideBarLinks(sidebar);
// ignore inner-page links with hashes
const candidates = uniqBy(links, (link) => link.link.replace(/[?#].*$/, ''));
const index = candidates.findIndex((link) => {
return isActive(page.value.relativePath, link.link);
});
const hidePrev = (theme.value.docFooter?.prev === false && !frontmatter.value.prev) ||
frontmatter.value.prev === false;
const hideNext = (theme.value.docFooter?.next === false && !frontmatter.value.next) ||
frontmatter.value.next === false;
return {
prev: hidePrev
? undefined
: {
text: (typeof frontmatter.value.prev === 'string'
? frontmatter.value.prev
: typeof frontmatter.value.prev === 'object'
? frontmatter.value.prev.text
: undefined) ??
candidates[index - 1]?.docFooterText ??
candidates[index - 1]?.text,
link: (typeof frontmatter.value.prev === 'object'
? frontmatter.value.prev.link
: undefined) ?? candidates[index - 1]?.link
},
next: hideNext
? undefined
: {
text: (typeof frontmatter.value.next === 'string'
? frontmatter.value.next
: typeof frontmatter.value.next === 'object'
? frontmatter.value.next.text
: undefined) ??
candidates[index + 1]?.docFooterText ??
candidates[index + 1]?.text,
link: (typeof frontmatter.value.next === 'object'
? frontmatter.value.next.link
: undefined) ?? candidates[index + 1]?.link
}
};
});
}
function uniqBy(array, keyFn) {
const seen = new Set();
return array.filter((item) => {
const k = keyFn(item);
return seen.has(k) ? false : seen.add(k);
});
}