friendica-github/view/theme/frio/js/hovercard.js

/*
 * The javascript for friendicas hovercard. Bootstraps popover is needed.
 *
 * Much parts of the code are from Hannes Mannerheims <h@nnesmannerhe.im>
 * qvitter code (https://github.com/hannesmannerheim/qvitter)
 *
 * It is licensed under the GNU Affero General Public License <http://www.gnu.org/licenses/>
 *
 */
$(document).ready(function () {
	let $body = $('body');
	// Prevents normal click action on click hovercard elements
	$body.on('click', '.userinfo.click-card', function (e) {
		e.preventDefault();
	});
	// This event listener needs to be declared before the one that removes
	// all cards so that we can stop the immediate propagation of the event
	// Since the manual popover appears instantly and the hovercard removal is
	// on a 100ms delay, leaving event propagation immediately hides any click hovercard
	$body.on('mousedown', '.userinfo.click-card', function (e) {
		e.stopImmediatePropagation();
		let timeNow = new Date().getTime();

		let contactUrl = false;
		let targetElement = $(this);

		// get href-attribute
		if (targetElement.is('[href]')) {
			contactUrl = targetElement.attr('href');
		} else {
			return true;
		}

		// no hovercard for anchor links
		if (contactUrl.substring(0, 1) === '#') {
			return true;
		}

		openHovercard(targetElement, contactUrl, timeNow);
	});

	// hover cards should be removed very easily, e.g. when any of these events happens
	$body.on('mouseleave touchstart scroll mousedown submit keydown', function (e) {
		// remove hover card only for desktiop user, since on mobile we open the hovercards
		// by click event insteadof hover
		removeAllHovercards(e, new Date().getTime());
	});

	$body.on('mouseover', '.userinfo.hover-card, .wall-item-responses a, .wall-item-bottom .mention a', function (e) {
		let timeNow = new Date().getTime();
		removeAllHovercards(e, timeNow);
		let contactUrl = false;
		let targetElement = $(this);

		// get href-attribute
		if (targetElement.is('[href]')) {
			contactUrl = targetElement.attr('href');
		} else {
			return true;
		}

		// no hover card if the element has the no-hover-card class
		if (targetElement.hasClass('no-hover-card')) {
			return true;
		}

		// no hovercard for anchor links
		if (contactUrl.substring(0, 1) === '#') {
			return true;
		}

		targetElement.attr('data-awaiting-hover-card', timeNow);

		// Delay until the hover-card does appear
		setTimeout(function () {
			if (
				targetElement.is(':hover')
				&& parseInt(targetElement.attr('data-awaiting-hover-card'), 10) === timeNow
				&& $('.hovercard').length === 0
			) {
				openHovercard(targetElement, contactUrl, timeNow);
			}
		}, 500);
	}).on('mouseleave', '.userinfo.hover-card, .wall-item-responses a, .wall-item-bottom .mention a', function (e) { // action when mouse leaves the hover-card
		removeAllHovercards(e, new Date().getTime());
	});

	// if we're hovering a hover card, give it a class, so we don't remove it
	$body.on('mouseover', '.hovercard', function (e) {
		$(this).addClass('dont-remove-card');
	});

	$body.on('mouseleave', '.hovercard', function (e) {
		$(this).removeClass('dont-remove-card');
		$(this).popover('hide');
	});
}); // End of $(document).ready

// removes all hover cards
function removeAllHovercards(event, priorTo) {
	// don't remove hovercards until after 100ms, so user have time to move the cursor to it (which gives it the dont-remove-card class)
	setTimeout(function () {
		$.each($('.hovercard'), function () {
			let title = $(this).attr('data-orig-title');
			// don't remove card if it was created after removeAllhoverCards() was called
			if ($(this).data('card-created') < priorTo) {
				// don't remove it if we're hovering it right now!
				if (!$(this).hasClass('dont-remove-card')) {
					let $handle = $('[data-hover-card-active="' + $(this).data('card-created') + '"]');
					$handle.removeAttr('data-hover-card-active');

					// Restoring the popover handle title
					let title = $handle.attr('data-orig-title');
					$handle.attr({'data-orig-title': '', title: title});

					$(this).popover('hide');
				}
			}
		});
	}, 100);
}

function openHovercard(targetElement, contactUrl, timeNow) {
	// store the title in a data attribute because Bootstrap
	// popover destroys the title attribute.
	let title = targetElement.attr('title');
	targetElement.attr({'data-orig-title': title, title: ''});

	// get an additional data atribute if the card is active
	targetElement.attr('data-hover-card-active', timeNow);
	// get the whole html content of the hover card and
	// push it to the bootstrap popover
	getHoverCardContent(contactUrl, function (data) {
		if (data) {
			targetElement.popover({
				html: true,
				placement: function () {
					// Calculate the placement of the the hovercard (if top or bottom)
					// The placement depence on the distance between window top and the element
					// which triggers the hover-card
					let get_position = $(targetElement).offset().top - $(window).scrollTop();
					if (get_position < 270) {
						return 'bottom';
					}
					return 'top';
				},
				trigger: 'manual',
				template: '<div class="popover hovercard" data-card-created="' + timeNow + '"><div class="arrow"></div><div class="popover-content hovercard-content"></div></div>',
				content: data,
				container: 'body',
				sanitizeFn: function (content) {
					return DOMPurify.sanitize(content)
				},
			}).popover('show');
		}
	});
}

getHoverCardContent.cache = {};

function getHoverCardContent(contact_url, callback) {
	let postdata = {
		url: contact_url,
	};

	// Normalize and clean the profile so we can use a standardized url
	// as key for the cache
	let nurl = cleanContactUrl(contact_url).normalizeLink();

	// If the contact is already in the cache use the cached result instead
	// of doing a new ajax request
	if (nurl in getHoverCardContent.cache) {
		callback(getHoverCardContent.cache[nurl]);
		return;
	}

	$.ajax({
		url: baseurl + '/contact/hovercard',
		data: postdata,
		success: function (data, textStatus, request) {
			getHoverCardContent.cache[nurl] = data;
			callback(data);
		},
	});
}