primevue-mirror/layouts/doc/DocSectionNav.vue

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2023-02-28 08:29:30 +00:00
<template>
<ul ref="nav" class="doc-section-nav">
<li v-for="doc of docs" :key="doc.label" :class="['navbar-item', { 'active-navbar-item': activeId === doc.id }]">
<div class="navbar-item-content">
<NuxtLink :to="`/${$router.currentRoute.value.name}/#${doc.id}`">
<button class="p-link" @click="onButtonClick(doc)">{{ doc.label }}</button>
</NuxtLink>
</div>
<template v-if="doc.children">
<ul>
<li v-for="child of doc.children" :key="child.label" :class="['navbar-item', { 'active-navbar-item': activeId === child.id }]">
<div class="navbar-item-content">
<NuxtLink :to="`/${$router.currentRoute.value.name}/#${child.id}`">
<button class="p-link" @click="onButtonClick(child)">
{{ child.label }}
</button>
</NuxtLink>
</div>
</li>
</ul>
</template>
</li>
</ul>
</template>
<script>
import { DomHandler, ObjectUtils } from 'primevue/utils';
export default {
props: ['docs'],
data() {
return {
activeId: null,
isScrollBlocked: false,
scrollEndTimer: null,
topbarHeight: 0
};
},
mounted() {
const hash = window.location.hash.substring(1);
const hasHash = ObjectUtils.isNotEmpty(hash);
const id = hasHash ? hash : (this.docs[0] || {}).id;
this.activeId = id;
hasHash &&
setTimeout(() => {
this.scrollToLabelById(id);
}, 1);
window.addEventListener('scroll', this.onScroll, { passive: true });
},
beforeUnmount() {
window.removeEventListener('scroll', this.onScroll, { passive: true });
},
methods: {
onScroll() {
if (!this.isScrollBlocked) {
const labels = document.querySelectorAll(':is(h1,h2,h3).doc-section-label');
const windowScrollTop = DomHandler.getWindowScrollTop();
labels.forEach((label) => {
const { top } = DomHandler.getOffset(label);
const threshold = this.getThreshold(label);
if (top - threshold <= windowScrollTop) {
const link = DomHandler.findSingle(label, 'a');
this.activeId = link.id;
}
});
}
clearTimeout(this.scrollEndTimer);
this.scrollEndTimer = setTimeout(() => {
this.isScrollBlocked = false;
const activeItem = DomHandler.findSingle(this.$refs.nav, '.active-navbar-item');
activeItem && activeItem.scrollIntoView({ block: 'nearest', inline: 'start' });
}, 50);
},
scrollToLabelById(id, behavior = 'smooth') {
const label = document.getElementById(id);
label && label.parentElement.scrollIntoView({ block: 'start', behavior });
},
onButtonClick(doc) {
this.activeId = doc.id;
setTimeout(() => {
this.scrollToLabelById(doc.id, 'smooth');
this.isScrollBlocked = true;
}, 1);
},
getThreshold(label) {
if (!this.topbarHeight) {
const topbar = DomHandler.findSingle(document.body, '.layout-topbar');
this.topbarHeight = topbar ? DomHandler.getHeight(topbar) : 0;
}
return this.topbarHeight + DomHandler.getHeight(label) * 1.5;
},
getIdOfTheSection(section) {
return section.querySelector('a').getAttribute('id');
}
}
};
</script>