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TableOfContents.vue
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TableOfContents.vue
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<script setup lang="ts">
import type { Heading } from '@islands/headings'
import type { SideBarItem } from '~/logic/config'
interface HeadingWithChildren extends Heading {
children?: Heading[]
}
let { meta, frontmatter } = usePage()
let level = $computed(() => frontmatter.tocLevel || (frontmatter.sidebar === 'auto' ? 3 : 2))
let headings = $computed(() => resolveHeaders(meta.headings || []))
function resolveHeaders (headings: Heading[]): SideBarItem[] {
return mapHeaders(groupHeaders(headings))
}
function groupHeaders (headings: Heading[]): HeadingWithChildren[] {
headings = headings.map(h => Object.assign({}, h))
let lastHeading: HeadingWithChildren
headings.forEach((h) => {
if (h.level === level)
lastHeading = h
else if (lastHeading)
(lastHeading.children || (lastHeading.children = [])).push(h)
})
return headings.filter(h => h.level === level)
}
function mapHeaders (headings: HeadingWithChildren[]): SideBarItem[] {
return headings.map(Heading => ({
text: Heading.title,
link: `#${Heading.slug}`,
children: Heading.children ? mapHeaders(Heading.children) : undefined,
}))
}
</script>
<template>
<div v-if="headings.length > 0" class="py-4 pl-6 lg:pt-10">
<SidebarLinkItem class="px-3 uppercase text-xs" header :item="{ text: 'On This Page', link: '' }"/>
<ul class="mb-2">
<li v-for="child in headings" :key="child.text">
<SidebarLinkItem :item="child" :table="true"/>
</li>
</ul>
</div>
</template>