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assets/dev/js/frontend/handlers/accessibility/nested-title-keyboard-handler.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| import Base from '../base'; | ||
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| const directionNext = 'next', | ||
| directionPrevious = 'previous'; | ||
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| export default class NestedTitleKeyboardHandler extends Base { | ||
| getDefaultSettings() { | ||
| return { | ||
| selectors: { | ||
| itemTitle: '.e-n-tab-title', | ||
| $itemContainer: '.e-n-tabs-content > .e-con', | ||
| }, | ||
| ariaAttributes: { | ||
| titleStateAttribute: 'aria-selected', | ||
| activeTitleSelector: '[aria-selected="true"]', | ||
| }, | ||
| datasets: { | ||
| titleIndex: 'data-tab-index', | ||
| }, | ||
| keyDirection: { | ||
| ArrowLeft: elementorFrontendConfig.is_rtl ? directionNext : directionPrevious, | ||
| ArrowUp: directionPrevious, | ||
| ArrowRight: elementorFrontendConfig.is_rtl ? directionPrevious : directionNext, | ||
| ArrowDown: directionNext, | ||
| }, | ||
| }; | ||
| } | ||
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| getDefaultElements() { | ||
| const selectors = this.getSettings( 'selectors' ); | ||
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| return { | ||
| $itemTitles: this.findElement( selectors.itemTitle ), | ||
| $itemContainers: this.findElement( selectors.$itemContainer ), | ||
| }; | ||
| } | ||
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| /** | ||
| * @param {HTMLElement} itemTitleElement | ||
| * | ||
| * @return {string} | ||
| */ | ||
| getTitleIndex( itemTitleElement ) { | ||
| const { titleIndex: indexAttribute } = this.getSettings( 'datasets' ); | ||
| return itemTitleElement.getAttribute( indexAttribute ); | ||
| } | ||
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| /** | ||
| * @param {string|number} titleIndex | ||
| * | ||
| * @return {string} | ||
| */ | ||
| getTitleFilterSelector( titleIndex ) { | ||
| const { titleIndex: indexAttribute } = this.getSettings( 'datasets' ); | ||
| return `[${ indexAttribute }="${ titleIndex }"]`; | ||
| } | ||
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| bindEvents() { | ||
| this.elements.$itemTitles.on( this.getTitleEvents() ); | ||
| this.elements.$itemContainers.children().on( 'keydown', this.handleContentElementEscapeEvent.bind( this ) ); | ||
| } | ||
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| unbindEvents() { | ||
| this.elements.$itemTitles.off(); | ||
| this.elements.$itemContainers.children().off(); | ||
| } | ||
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| handleTitleKeyboardNavigation( event ) { | ||
| const directionKeys = [ 'ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown', 'Home', 'End' ], | ||
| activationKeys = [ 'Enter', 'Space' ]; | ||
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| if ( directionKeys.includes( event.key ) ) { | ||
| event.preventDefault(); | ||
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| const currentTitleIndex = parseInt( this.getTitleIndex( event.currentTarget ) ) || 1, | ||
| numberOfTitles = this.elements.$itemTitles.length, | ||
| titleIndexUpdated = this.getTitleIndexFocusUpdated( event, currentTitleIndex, numberOfTitles ); | ||
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| this.changeTitleFocus( currentTitleIndex, titleIndexUpdated ); | ||
| } else if ( activationKeys.includes( event.key ) ) { | ||
| event.preventDefault(); | ||
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| const titleIndex = this.getTitleIndex( event.currentTarget ); | ||
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| elementorFrontend.elements.$window.trigger( 'elementor/nested-elements/activate-by-keyboard', titleIndex ); | ||
| } | ||
| } | ||
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| getTitleEvents() { | ||
| return { | ||
| keydown: this.handleTitleKeyboardNavigation.bind( this ), | ||
| }; | ||
| } | ||
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| getTitleIndexFocusUpdated( event, currentTitleIndex, numberOfTitles ) { | ||
| let titleIndexUpdated = 0; | ||
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| switch ( event.key ) { | ||
| case 'Home': | ||
| titleIndexUpdated = 1; | ||
| break; | ||
| case 'End': | ||
| titleIndexUpdated = numberOfTitles; | ||
| break; | ||
| default: | ||
| const direction = this.getSettings( 'keyDirection' )[ event.key ], | ||
| directionValue = directionNext === direction ? 1 : -1, | ||
| isEndReached = numberOfTitles < currentTitleIndex + directionValue, | ||
| isStartReached = 0 === currentTitleIndex + directionValue; | ||
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| if ( isEndReached ) { | ||
| titleIndexUpdated = 1; | ||
| } else if ( isStartReached ) { | ||
| titleIndexUpdated = numberOfTitles; | ||
| } else { | ||
| titleIndexUpdated = currentTitleIndex + directionValue; | ||
| } | ||
| } | ||
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| return titleIndexUpdated; | ||
| } | ||
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| changeTitleFocus( currentTitleIndex, titleIndexUpdated ) { | ||
| const $currentTitle = this.elements.$itemTitles.filter( this.getTitleFilterSelector( currentTitleIndex ) ), | ||
| $newTitle = this.elements.$itemTitles.filter( this.getTitleFilterSelector( titleIndexUpdated ) ); | ||
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| $currentTitle.attr( 'tabindex', '-1' ); | ||
| $newTitle.attr( 'tabindex', '0' ); | ||
| $newTitle.trigger( 'focus' ); | ||
| } | ||
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| handleContentElementEscapeEvent( event ) { | ||
| if ( 'Escape' !== event.key ) { | ||
| return; | ||
| } | ||
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| const activeTitleFilter = this.getSettings( 'ariaAttributes' ).activeTitleSelector, | ||
| $activeTitle = this.elements.$itemTitles.filter( activeTitleFilter ); | ||
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| $activeTitle.trigger( 'focus' ); | ||
| } | ||
| } |
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