BookStack/resources/assets/js/components/breadcrumb-listing.js

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JavaScript
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class BreadcrumbListing {
constructor(elem) {
this.elem = elem;
this.searchInput = elem.querySelector('input');
this.loadingElem = elem.querySelector('.loading-container');
this.entityListElem = elem.querySelector('.breadcrumb-listing-entity-list');
this.toggleElem = elem.querySelector('[dropdown-toggle]');
// this.loadingElem.style.display = 'none';
const entityDescriptor = elem.getAttribute('breadcrumb-listing').split(':');
this.entityType = entityDescriptor[0];
this.entityId = Number(entityDescriptor[1]);
this.toggleElem.addEventListener('click', this.onShow.bind(this));
this.searchInput.addEventListener('input', this.onSearch.bind(this));
this.elem.addEventListener('keydown', this.keyDown.bind(this));
}
keyDown(event) {
if (event.key === 'ArrowDown') {
this.listFocusChange(1);
event.preventDefault();
} else if (event.key === 'ArrowUp') {
this.listFocusChange(-1);
event.preventDefault();
}
}
listFocusChange(indexChange = 1) {
const links = Array.from(this.entityListElem.querySelectorAll('a:not(.hidden)'));
const currentFocused = this.entityListElem.querySelector('a:focus');
const currentFocusedIndex = links.indexOf(currentFocused);
const defaultFocus = (indexChange > 0) ? links[0] : this.searchInput;
const nextElem = links[currentFocusedIndex + indexChange] || defaultFocus;
nextElem.focus();
}
onShow() {
this.loadEntityView();
}
onSearch() {
const input = this.searchInput.value.toLowerCase().trim();
const listItems = this.entityListElem.querySelectorAll('.entity-list-item');
for (let listItem of listItems) {
const match = !input || listItem.textContent.toLowerCase().includes(input);
listItem.style.display = match ? 'flex' : 'none';
listItem.classList.toggle('hidden', !match);
}
}
loadEntityView() {
this.toggleLoading(true);
const params = {
'entity_id': this.entityId,
'entity_type': this.entityType,
};
window.$http.get('/search/entity/siblings', {params}).then(resp => {
this.entityListElem.innerHTML = resp.data;
}).catch(err => {
console.error(err);
}).then(() => {
this.toggleLoading(false);
this.onSearch();
});
}
toggleLoading(show = false) {
this.loadingElem.style.display = show ? 'block' : 'none';
}
}
export default BreadcrumbListing;