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prev-next.ts
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prev-next.ts
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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 candidates = getFlatSideBarLinks(sidebar)
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
}
} as {
prev?: { text?: string; link?: string }
next?: { text?: string; link?: string }
}
})
}