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190 lines
6.9 KiB
JavaScript
190 lines
6.9 KiB
JavaScript
import tippy, {followCursor} from 'tippy.js';
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const visibleInstances = new Set();
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export function createTippy(target, opts = {}) {
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// the callback functions should be destructured from opts,
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// because we should use our own wrapper functions to handle them, do not let the user override them
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const {onHide, onShow, onDestroy, ...other} = opts;
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const instance = tippy(target, {
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appendTo: document.body,
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animation: false,
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allowHTML: false,
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hideOnClick: false,
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interactiveBorder: 20,
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ignoreAttributes: true,
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maxWidth: 500, // increase over default 350px
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onHide: (instance) => {
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visibleInstances.delete(instance);
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return onHide?.(instance);
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},
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onDestroy: (instance) => {
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visibleInstances.delete(instance);
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return onDestroy?.(instance);
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},
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onShow: (instance) => {
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// hide other tooltip instances so only one tooltip shows at a time
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for (const visibleInstance of visibleInstances) {
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if (visibleInstance.props.role === 'tooltip') {
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visibleInstance.hide();
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}
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}
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visibleInstances.add(instance);
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return onShow?.(instance);
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},
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arrow: `<svg width="16" height="7"><path d="m0 7 8-7 8 7Z" class="tippy-svg-arrow-outer"/><path d="m0 8 8-7 8 7Z" class="tippy-svg-arrow-inner"/></svg>`,
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role: 'menu', // HTML role attribute, only tooltips should use "tooltip"
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theme: other.role || 'menu', // CSS theme, either "tooltip", "menu" or "box-with-header"
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plugins: [followCursor],
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...other,
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});
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// for popups where content refers to a DOM element, we use the 'tippy-target' class
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// to initially hide the content, now we can remove it as the content has been removed
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// from the DOM by tippy
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if (other.content instanceof Element) {
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other.content.classList.remove('tippy-target');
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}
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return instance;
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}
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/**
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* Attach a tooltip tippy to the given target element.
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* If the target element already has a tooltip tippy attached, the tooltip will be updated with the new content.
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* If the target element has no content, then no tooltip will be attached, and it returns null.
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*
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* Note: "tooltip" doesn't equal to "tippy". "tooltip" means a auto-popup content, it just uses tippy as the implementation.
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*
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* @param target {HTMLElement}
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* @param content {null|string}
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* @returns {null|tippy}
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*/
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function attachTooltip(target, content = null) {
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switchTitleToTooltip(target);
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content = content ?? target.getAttribute('data-tooltip-content');
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if (!content) return null;
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// when element has a clipboard target, we update the tooltip after copy
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// in which case it is undesirable to automatically hide it on click as
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// it would momentarily flash the tooltip out and in.
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const hasClipboardTarget = target.hasAttribute('data-clipboard-target');
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const hideOnClick = !hasClipboardTarget;
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const props = {
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content,
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delay: 100,
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role: 'tooltip',
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theme: 'tooltip',
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hideOnClick,
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placement: target.getAttribute('data-tooltip-placement') || 'top-start',
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followCursor: target.getAttribute('data-tooltip-follow-cursor') || false,
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...(target.getAttribute('data-tooltip-interactive') === 'true' ? {interactive: true, aria: {content: 'describedby', expanded: false}} : {}),
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};
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if (!target._tippy) {
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createTippy(target, props);
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} else {
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target._tippy.setProps(props);
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}
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return target._tippy;
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}
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function switchTitleToTooltip(target) {
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const title = target.getAttribute('title');
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if (title) {
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target.setAttribute('data-tooltip-content', title);
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target.setAttribute('aria-label', title);
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// keep the attribute, in case there are some other "[title]" selectors
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// and to prevent infinite loop with <relative-time> which will re-add
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// title if it is absent
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target.setAttribute('title', '');
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}
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}
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/**
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* Creating tooltip tippy instance is expensive, so we only create it when the user hovers over the element
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* According to https://www.w3.org/TR/DOM-Level-3-Events/#events-mouseevent-event-order , mouseover event is fired before mouseenter event
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* Some browsers like PaleMoon don't support "addEventListener('mouseenter', capture)"
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* The tippy by default uses "mouseenter" event to show, so we use "mouseover" event to switch to tippy
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* @param e {Event}
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*/
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function lazyTooltipOnMouseHover(e) {
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e.target.removeEventListener('mouseover', lazyTooltipOnMouseHover, true);
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attachTooltip(this);
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}
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// Activate the tooltip for current element.
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// If the element has no aria-label, use the tooltip content as aria-label.
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function attachLazyTooltip(el) {
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el.addEventListener('mouseover', lazyTooltipOnMouseHover, {capture: true});
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// meanwhile, if the element has no aria-label, use the tooltip content as aria-label
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if (!el.hasAttribute('aria-label')) {
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const content = el.getAttribute('data-tooltip-content');
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if (content) {
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el.setAttribute('aria-label', content);
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}
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}
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}
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// Activate the tooltip for all children elements.
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function attachChildrenLazyTooltip(target) {
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for (const el of target.querySelectorAll('[data-tooltip-content]')) {
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attachLazyTooltip(el);
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}
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}
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const elementNodeTypes = new Set([Node.ELEMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE]);
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export function initGlobalTooltips() {
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// use MutationObserver to detect new "data-tooltip-content" elements added to the DOM, or attributes changed
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const observerConnect = (observer) => observer.observe(document, {
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subtree: true,
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childList: true,
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attributeFilter: ['data-tooltip-content', 'title']
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});
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const observer = new MutationObserver((mutationList, observer) => {
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const pending = observer.takeRecords();
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observer.disconnect();
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for (const mutation of [...mutationList, ...pending]) {
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if (mutation.type === 'childList') {
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// mainly for Vue components and AJAX rendered elements
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for (const el of mutation.addedNodes) {
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if (elementNodeTypes.has(el.nodeType)) {
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attachChildrenLazyTooltip(el);
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if (el.hasAttribute('data-tooltip-content')) {
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attachLazyTooltip(el);
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}
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}
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}
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} else if (mutation.type === 'attributes') {
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attachTooltip(mutation.target);
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}
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}
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observerConnect(observer);
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});
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observerConnect(observer);
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attachChildrenLazyTooltip(document.documentElement);
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}
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export function showTemporaryTooltip(target, content) {
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// if the target is inside a dropdown, don't show the tooltip because when the dropdown
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// closes, the tippy would be pushed unsightly to the top-left of the screen like seen
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// on the issue comment menu.
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if (target.closest('.ui.dropdown > .menu')) return;
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const tippy = target._tippy ?? attachTooltip(target, content);
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tippy.setContent(content);
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if (!tippy.state.isShown) tippy.show();
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tippy.setProps({
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onHidden: (tippy) => {
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// reset the default tooltip content, if no default, then this temporary tooltip could be destroyed
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if (!attachTooltip(target)) {
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tippy.destroy();
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}
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},
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});
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}
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