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034191c78a
* use matchMedia * use last-of-type * better type check * simplify distanceFromTopWindow * use visibility * update JSDoc
179 lines
4.2 KiB
JavaScript
179 lines
4.2 KiB
JavaScript
import { wrap } from '../lib/utils';
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export default class Container {
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constructor({ element, type, classNames, position }) {
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Object.assign(this, { element, classNames, type, position });
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this.isOpen = false;
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this.isFlipped = false;
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this.isFocussed = false;
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this.isDisabled = false;
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this.isLoading = false;
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this._onFocus = this._onFocus.bind(this);
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this._onBlur = this._onBlur.bind(this);
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}
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/**
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* Add event listeners
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*/
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addEventListeners() {
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this.element.addEventListener('focus', this._onFocus);
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this.element.addEventListener('blur', this._onBlur);
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}
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/**
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* Remove event listeners
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*/
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/** */
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removeEventListeners() {
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this.element.removeEventListener('focus', this._onFocus);
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this.element.removeEventListener('blur', this._onBlur);
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}
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/**
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* Determine whether container should be flipped
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* based on passed dropdown position
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* @param {Number} dropdownPos
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* @returns
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*/
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shouldFlip(dropdownPos) {
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if (typeof dropdownPos !== 'number') {
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return false;
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}
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// If flip is enabled and the dropdown bottom position is
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// greater than the window height flip the dropdown.
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let shouldFlip = false;
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if (this.position === 'auto') {
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shouldFlip = !window.matchMedia(`(min-height: ${dropdownPos + 1}px)`)
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.matches;
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} else if (this.position === 'top') {
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shouldFlip = true;
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}
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return shouldFlip;
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}
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/**
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* Set active descendant attribute
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* @param {Number} activeDescendant ID of active descendant
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*/
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setActiveDescendant(activeDescendantID) {
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this.element.setAttribute('aria-activedescendant', activeDescendantID);
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}
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/**
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* Remove active descendant attribute
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*/
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removeActiveDescendant() {
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this.element.removeAttribute('aria-activedescendant');
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}
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open(dropdownPos) {
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this.element.classList.add(this.classNames.openState);
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this.element.setAttribute('aria-expanded', 'true');
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this.isOpen = true;
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if (this.shouldFlip(dropdownPos)) {
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this.element.classList.add(this.classNames.flippedState);
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this.isFlipped = true;
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}
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}
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close() {
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this.element.classList.remove(this.classNames.openState);
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this.element.setAttribute('aria-expanded', 'false');
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this.removeActiveDescendant();
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this.isOpen = false;
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// A dropdown flips if it does not have space within the page
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if (this.isFlipped) {
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this.element.classList.remove(this.classNames.flippedState);
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this.isFlipped = false;
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}
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}
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focus() {
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if (!this.isFocussed) {
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this.element.focus();
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}
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}
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addFocusState() {
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this.element.classList.add(this.classNames.focusState);
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}
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removeFocusState() {
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this.element.classList.remove(this.classNames.focusState);
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}
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/**
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* Remove disabled state
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*/
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enable() {
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this.element.classList.remove(this.classNames.disabledState);
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this.element.removeAttribute('aria-disabled');
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if (this.type === 'select-one') {
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this.element.setAttribute('tabindex', '0');
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}
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this.isDisabled = false;
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}
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/**
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* Set disabled state
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*/
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disable() {
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this.element.classList.add(this.classNames.disabledState);
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this.element.setAttribute('aria-disabled', 'true');
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if (this.type === 'select-one') {
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this.element.setAttribute('tabindex', '-1');
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}
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this.isDisabled = true;
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}
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wrap(element) {
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wrap(element, this.element);
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}
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unwrap(element) {
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// Move passed element outside this element
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this.element.parentNode.insertBefore(element, this.element);
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// Remove this element
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this.element.parentNode.removeChild(this.element);
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}
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/**
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* Add loading state to element
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*/
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addLoadingState() {
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this.element.classList.add(this.classNames.loadingState);
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this.element.setAttribute('aria-busy', 'true');
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this.isLoading = true;
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}
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/**
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* Remove loading state from element
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*/
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removeLoadingState() {
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this.element.classList.remove(this.classNames.loadingState);
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this.element.removeAttribute('aria-busy');
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this.isLoading = false;
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}
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/**
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* Set focussed state
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*/
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_onFocus() {
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this.isFocussed = true;
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}
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/**
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* Remove blurred state
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*/
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_onBlur() {
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this.isFocussed = false;
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}
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}
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