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ef84c1607d
prevent loosing the tick when user clicks on the toggle button or when they Press Esc to close the dropdown.
12 lines
4.0 KiB
JavaScript
12 lines
4.0 KiB
JavaScript
define("core/menu_navigation",["exports"],(function(_exports){Object.defineProperty(_exports,"__esModule",{value:!0}),_exports.default=void 0;
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/**
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* Keyboard initialization for a given html node.
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*
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* @module core/menu_navigation
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* @copyright 2021 Moodle
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* @author Mathew May <mathew.solutions>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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const SELECTORS_menuitem='[role="menuitem"]',SELECTORS_tab='[role="tab"]',SELECTORS_dropdowntoggle='[data-toggle="dropdown"]';let openDropdownNode=null;const clickErrorHandler=(item,fallback)=>null!==item?item:fallback,menuItemHelper=src=>{let parent;if(!src.dataset.disableactive){if(src.classList.contains("dropdown-item")){parent=src.closest(".dropdown-menu");const dropDownToggle=document.getElementById(parent.getAttribute("aria-labelledby"));dropDownToggle.classList.add("active"),dropDownToggle.setAttribute("tabindex",0)}else{if(!src.matches("".concat(SELECTORS_tab,",").concat(SELECTORS_menuitem))||src.matches(SELECTORS_dropdowntoggle))return;parent=src.parentElement.parentElement.querySelector(".dropdown-menu")}Array.prototype.forEach.call(parent.children,(node=>{const menuItem=node.querySelector(SELECTORS_menuitem);null!==menuItem&&(menuItem.classList.remove("active"),menuItem.removeAttribute("aria-current"))})),"menuitem"===src.getAttribute("role")&&src.setAttribute("aria-current","true")}},keyboardListenerEvents=e=>{const src=e.srcElement,firstNode=e.currentTarget.firstElementChild,lastNode=findUsableLastNode(e.currentTarget);if(src.classList.contains("dropdown-item"))"ArrowRight"!=e.key&&"ArrowLeft"!=e.key||(e.preventDefault(),null!==openDropdownNode&&openDropdownNode.parentElement.click())," "!=e.key&&"Enter"!=e.key||(e.preventDefault(),menuItemHelper(src),src.parentElement.classList.contains("dropdown")||src.click());else{const rtl=window.right_to_left(),arrowNext=rtl?"ArrowLeft":"ArrowRight",arrowPrevious=rtl?"ArrowRight":"ArrowLeft";"menuitem"===src.getAttribute("role")&&(e.key==arrowNext&&(e.preventDefault(),setFocusNext(src,firstNode)),e.key==arrowPrevious&&(e.preventDefault(),setFocusPrev(src,lastNode)),"ArrowUp"!=e.key&&"ArrowDown"!=e.key||(openDropdownNode=src,e.preventDefault()),"Home"==e.key&&(e.preventDefault(),setFocusHomeEnd(firstNode)),"End"==e.key&&(e.preventDefault(),setFocusHomeEnd(lastNode)))," "!=e.key&&"Enter"!=e.key||(e.preventDefault(),src.parentElement.classList.contains("dropdown")||src.click())}},clickListenerEvents=e=>{const src=e.srcElement;menuItemHelper(src)};_exports.default=elementRoot=>{elementRoot.removeEventListener("keydown",keyboardListenerEvents),elementRoot.removeEventListener("click",clickListenerEvents),elementRoot.addEventListener("keydown",keyboardListenerEvents),elementRoot.addEventListener("click",clickListenerEvents)};const setFocusNext=(currentNode,firstNode)=>{const listElement=currentNode.parentElement,nextListItem=(el=>{do{el=el.nextElementSibling}while(el&&!el.offsetHeight);return el})(listElement),nodeToSelect=clickErrorHandler(nextListItem,firstNode),itemSelector="tablist"===listElement.parentElement.getAttribute("role")?SELECTORS_tab:SELECTORS_menuitem;nodeToSelect.querySelector(itemSelector).focus()},setFocusPrev=(currentNode,lastNode)=>{const listElement=currentNode.parentElement,nextListItem=(el=>{do{el=el.previousElementSibling}while(el&&!el.offsetHeight);return el})(listElement),nodeToSelect=clickErrorHandler(nextListItem,lastNode),itemSelector="tablist"===listElement.parentElement.getAttribute("role")?SELECTORS_tab:SELECTORS_menuitem;nodeToSelect.querySelector(itemSelector).focus()},setFocusHomeEnd=node=>{node.querySelector(SELECTORS_menuitem).focus()},findUsableLastNode=elementRoot=>{if(elementRoot.lastElementChild.classList.contains("d-none")){const nodesToUse=Array.prototype.map.call(elementRoot.children,(node=>node)).reverse().filter((node=>{if(!node.classList.contains("d-none"))return node}));return 0!==nodesToUse.length?nodesToUse[0]:elementRoot.firstElementChild}return elementRoot.lastElementChild};return _exports.default}));
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//# sourceMappingURL=menu_navigation.min.js.map
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