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Diffstat (limited to 'js/src/tab.js')
-rw-r--r-- | js/src/tab.js | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/js/src/tab.js b/js/src/tab.js new file mode 100644 index 0000000..8dc4644 --- /dev/null +++ b/js/src/tab.js @@ -0,0 +1,305 @@ +/** + * -------------------------------------------------------------------------- + * Bootstrap (v5.2.3): tab.js + * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE) + * -------------------------------------------------------------------------- + */ + +import { defineJQueryPlugin, getElementFromSelector, getNextActiveElement, isDisabled } from './util/index' +import EventHandler from './dom/event-handler' +import SelectorEngine from './dom/selector-engine' +import BaseComponent from './base-component' + +/** + * Constants + */ + +const NAME = 'tab' +const DATA_KEY = 'bs.tab' +const EVENT_KEY = `.${DATA_KEY}` + +const EVENT_HIDE = `hide${EVENT_KEY}` +const EVENT_HIDDEN = `hidden${EVENT_KEY}` +const EVENT_SHOW = `show${EVENT_KEY}` +const EVENT_SHOWN = `shown${EVENT_KEY}` +const EVENT_CLICK_DATA_API = `click${EVENT_KEY}` +const EVENT_KEYDOWN = `keydown${EVENT_KEY}` +const EVENT_LOAD_DATA_API = `load${EVENT_KEY}` + +const ARROW_LEFT_KEY = 'ArrowLeft' +const ARROW_RIGHT_KEY = 'ArrowRight' +const ARROW_UP_KEY = 'ArrowUp' +const ARROW_DOWN_KEY = 'ArrowDown' + +const CLASS_NAME_ACTIVE = 'active' +const CLASS_NAME_FADE = 'fade' +const CLASS_NAME_SHOW = 'show' +const CLASS_DROPDOWN = 'dropdown' + +const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle' +const SELECTOR_DROPDOWN_MENU = '.dropdown-menu' +const NOT_SELECTOR_DROPDOWN_TOGGLE = ':not(.dropdown-toggle)' + +const SELECTOR_TAB_PANEL = '.list-group, .nav, [role="tablist"]' +const SELECTOR_OUTER = '.nav-item, .list-group-item' +const SELECTOR_INNER = `.nav-link${NOT_SELECTOR_DROPDOWN_TOGGLE}, .list-group-item${NOT_SELECTOR_DROPDOWN_TOGGLE}, [role="tab"]${NOT_SELECTOR_DROPDOWN_TOGGLE}` +const SELECTOR_DATA_TOGGLE = '[data-bs-toggle="tab"], [data-bs-toggle="pill"], [data-bs-toggle="list"]' // todo:v6: could be only `tab` +const SELECTOR_INNER_ELEM = `${SELECTOR_INNER}, ${SELECTOR_DATA_TOGGLE}` + +const SELECTOR_DATA_TOGGLE_ACTIVE = `.${CLASS_NAME_ACTIVE}[data-bs-toggle="tab"], .${CLASS_NAME_ACTIVE}[data-bs-toggle="pill"], .${CLASS_NAME_ACTIVE}[data-bs-toggle="list"]` + +/** + * Class definition + */ + +class Tab extends BaseComponent { + constructor(element) { + super(element) + this._parent = this._element.closest(SELECTOR_TAB_PANEL) + + if (!this._parent) { + return + // todo: should Throw exception on v6 + // throw new TypeError(`${element.outerHTML} has not a valid parent ${SELECTOR_INNER_ELEM}`) + } + + // Set up initial aria attributes + this._setInitialAttributes(this._parent, this._getChildren()) + + EventHandler.on(this._element, EVENT_KEYDOWN, event => this._keydown(event)) + } + + // Getters + static get NAME() { + return NAME + } + + // Public + show() { // Shows this elem and deactivate the active sibling if exists + const innerElem = this._element + if (this._elemIsActive(innerElem)) { + return + } + + // Search for active tab on same parent to deactivate it + const active = this._getActiveElem() + + const hideEvent = active ? + EventHandler.trigger(active, EVENT_HIDE, { relatedTarget: innerElem }) : + null + + const showEvent = EventHandler.trigger(innerElem, EVENT_SHOW, { relatedTarget: active }) + + if (showEvent.defaultPrevented || (hideEvent && hideEvent.defaultPrevented)) { + return + } + + this._deactivate(active, innerElem) + this._activate(innerElem, active) + } + + // Private + _activate(element, relatedElem) { + if (!element) { + return + } + + element.classList.add(CLASS_NAME_ACTIVE) + + this._activate(getElementFromSelector(element)) // Search and activate/show the proper section + + const complete = () => { + if (element.getAttribute('role') !== 'tab') { + element.classList.add(CLASS_NAME_SHOW) + return + } + + element.removeAttribute('tabindex') + element.setAttribute('aria-selected', true) + this._toggleDropDown(element, true) + EventHandler.trigger(element, EVENT_SHOWN, { + relatedTarget: relatedElem + }) + } + + this._queueCallback(complete, element, element.classList.contains(CLASS_NAME_FADE)) + } + + _deactivate(element, relatedElem) { + if (!element) { + return + } + + element.classList.remove(CLASS_NAME_ACTIVE) + element.blur() + + this._deactivate(getElementFromSelector(element)) // Search and deactivate the shown section too + + const complete = () => { + if (element.getAttribute('role') !== 'tab') { + element.classList.remove(CLASS_NAME_SHOW) + return + } + + element.setAttribute('aria-selected', false) + element.setAttribute('tabindex', '-1') + this._toggleDropDown(element, false) + EventHandler.trigger(element, EVENT_HIDDEN, { relatedTarget: relatedElem }) + } + + this._queueCallback(complete, element, element.classList.contains(CLASS_NAME_FADE)) + } + + _keydown(event) { + if (!([ARROW_LEFT_KEY, ARROW_RIGHT_KEY, ARROW_UP_KEY, ARROW_DOWN_KEY].includes(event.key))) { + return + } + + event.stopPropagation()// stopPropagation/preventDefault both added to support up/down keys without scrolling the page + event.preventDefault() + const isNext = [ARROW_RIGHT_KEY, ARROW_DOWN_KEY].includes(event.key) + const nextActiveElement = getNextActiveElement(this._getChildren().filter(element => !isDisabled(element)), event.target, isNext, true) + + if (nextActiveElement) { + nextActiveElement.focus({ preventScroll: true }) + Tab.getOrCreateInstance(nextActiveElement).show() + } + } + + _getChildren() { // collection of inner elements + return SelectorEngine.find(SELECTOR_INNER_ELEM, this._parent) + } + + _getActiveElem() { + return this._getChildren().find(child => this._elemIsActive(child)) || null + } + + _setInitialAttributes(parent, children) { + this._setAttributeIfNotExists(parent, 'role', 'tablist') + + for (const child of children) { + this._setInitialAttributesOnChild(child) + } + } + + _setInitialAttributesOnChild(child) { + child = this._getInnerElement(child) + const isActive = this._elemIsActive(child) + const outerElem = this._getOuterElement(child) + child.setAttribute('aria-selected', isActive) + + if (outerElem !== child) { + this._setAttributeIfNotExists(outerElem, 'role', 'presentation') + } + + if (!isActive) { + child.setAttribute('tabindex', '-1') + } + + this._setAttributeIfNotExists(child, 'role', 'tab') + + // set attributes to the related panel too + this._setInitialAttributesOnTargetPanel(child) + } + + _setInitialAttributesOnTargetPanel(child) { + const target = getElementFromSelector(child) + + if (!target) { + return + } + + this._setAttributeIfNotExists(target, 'role', 'tabpanel') + + if (child.id) { + this._setAttributeIfNotExists(target, 'aria-labelledby', `#${child.id}`) + } + } + + _toggleDropDown(element, open) { + const outerElem = this._getOuterElement(element) + if (!outerElem.classList.contains(CLASS_DROPDOWN)) { + return + } + + const toggle = (selector, className) => { + const element = SelectorEngine.findOne(selector, outerElem) + if (element) { + element.classList.toggle(className, open) + } + } + + toggle(SELECTOR_DROPDOWN_TOGGLE, CLASS_NAME_ACTIVE) + toggle(SELECTOR_DROPDOWN_MENU, CLASS_NAME_SHOW) + outerElem.setAttribute('aria-expanded', open) + } + + _setAttributeIfNotExists(element, attribute, value) { + if (!element.hasAttribute(attribute)) { + element.setAttribute(attribute, value) + } + } + + _elemIsActive(elem) { + return elem.classList.contains(CLASS_NAME_ACTIVE) + } + + // Try to get the inner element (usually the .nav-link) + _getInnerElement(elem) { + return elem.matches(SELECTOR_INNER_ELEM) ? elem : SelectorEngine.findOne(SELECTOR_INNER_ELEM, elem) + } + + // Try to get the outer element (usually the .nav-item) + _getOuterElement(elem) { + return elem.closest(SELECTOR_OUTER) || elem + } + + // Static + static jQueryInterface(config) { + return this.each(function () { + const data = Tab.getOrCreateInstance(this) + + if (typeof config !== 'string') { + return + } + + if (data[config] === undefined || config.startsWith('_') || config === 'constructor') { + throw new TypeError(`No method named "${config}"`) + } + + data[config]() + }) + } +} + +/** + * Data API implementation + */ + +EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) { + if (['A', 'AREA'].includes(this.tagName)) { + event.preventDefault() + } + + if (isDisabled(this)) { + return + } + + Tab.getOrCreateInstance(this).show() +}) + +/** + * Initialize on focus + */ +EventHandler.on(window, EVENT_LOAD_DATA_API, () => { + for (const element of SelectorEngine.find(SELECTOR_DATA_TOGGLE_ACTIVE)) { + Tab.getOrCreateInstance(element) + } +}) +/** + * jQuery + */ + +defineJQueryPlugin(Tab) + +export default Tab |