{"version":3,"file":"aria.min.js","sources":["https:\/\/formacion.cordoba-acoge.com\/theme\/boost\/amd\/src\/aria.js"],"sourcesContent":["\/\/ This file is part of Moodle - http:\/\/moodle.org\/\n\/\/\n\/\/ Moodle is free software: you can redistribute it and\/or modify\n\/\/ it under the terms of the GNU General Public License as published by\n\/\/ the Free Software Foundation, either version 3 of the License, or\n\/\/ (at your option) any later version.\n\/\/\n\/\/ Moodle is distributed in the hope that it will be useful,\n\/\/ but WITHOUT ANY WARRANTY; without even the implied warranty of\n\/\/ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n\/\/ GNU General Public License for more details.\n\/\/\n\/\/ You should have received a copy of the GNU General Public License\n\/\/ along with Moodle.  If not, see <http:\/\/www.gnu.org\/licenses\/>.\n\n\/**\n * Enhancements to Bootstrap components for accessibility.\n *\n * @module     theme_boost\/aria\n * @copyright  2018 Damyon Wiese <damyon@moodle.com>\n * @license    http:\/\/www.gnu.org\/copyleft\/gpl.html GNU GPL v3 or later\n *\/\n\nimport $ from 'jquery';\nimport Pending from 'core\/pending';\n\n\/**\n * Drop downs from bootstrap don't support keyboard accessibility by default.\n *\/\nconst dropdownFix = () => {\n    let focusEnd = false;\n    const setFocusEnd = (end = true) => {\n        focusEnd = end;\n    };\n    const getFocusEnd = () => {\n        const result = focusEnd;\n        focusEnd = false;\n        return result;\n    };\n\n    \/\/ Special handling for navigation keys when menu is open.\n    const shiftFocus = element => {\n        const delayedFocus = pendingPromise => {\n            element.focus();\n            pendingPromise.resolve();\n        };\n        setTimeout(delayedFocus, 50, new Pending('core\/aria:delayed-focus'));\n    };\n\n    \/\/ Event handling for the dropdown menu button.\n    const handleMenuButton = e => {\n        const trigger = e.key;\n        let fixFocus = false;\n\n        \/\/ Space key or Enter key opens the menu.\n        if (trigger === ' ' || trigger === 'Enter') {\n            fixFocus = true;\n            \/\/ Cancel random scroll.\n            e.preventDefault();\n            \/\/ Open the menu instead.\n            e.target.click();\n        }\n\n        \/\/ Up and Down keys also open the menu.\n        if (trigger === 'ArrowUp' || trigger === 'ArrowDown') {\n            fixFocus = true;\n        }\n\n        if (!fixFocus) {\n            \/\/ No need to fix the focus. Return early.\n            return;\n        }\n\n        \/\/ Fix the focus on the menu items when the menu is opened.\n        const menu = e.target.parentElement.querySelector('[role=\"menu\"]');\n        let menuItems = false;\n        let foundMenuItem = false;\n\n        if (menu) {\n            menuItems = menu.querySelectorAll('[role=\"menuitem\"]');\n        }\n        if (menuItems && menuItems.length > 0) {\n            \/\/ Up key opens the menu at the end.\n            if (trigger === 'ArrowUp') {\n                setFocusEnd();\n            } else {\n                setFocusEnd(false);\n            }\n\n            if (getFocusEnd()) {\n                foundMenuItem = menuItems[menuItems.length - 1];\n            } else {\n                \/\/ The first menu entry, pretty reasonable.\n                foundMenuItem = menuItems[0];\n            }\n        }\n\n        if (foundMenuItem) {\n            shiftFocus(foundMenuItem);\n        }\n    };\n\n    \/\/ Search for menu items by finding the first item that has\n    \/\/ text starting with the typed character (case insensitive).\n    document.addEventListener('keypress', e => {\n        if (e.target.matches('.dropdown [role=\"menu\"] [role=\"menuitem\"]')) {\n            const menu = e.target.closest('[role=\"menu\"]');\n            if (!menu) {\n                return;\n            }\n            const menuItems = menu.querySelectorAll('[role=\"menuitem\"]');\n            if (!menuItems) {\n                return;\n            }\n\n            const trigger = e.key.toLowerCase();\n\n            for (let i = 0; i < menuItems.length; i++) {\n                const item = menuItems[i];\n                const itemText = item.text.trim().toLowerCase();\n                if (itemText.indexOf(trigger) == 0) {\n                    shiftFocus(item);\n                    break;\n                }\n            }\n        }\n    });\n\n    \/\/ Keyboard navigation for arrow keys, home and end keys.\n    document.addEventListener('keydown', e => {\n\n        \/\/ We only want to set focus when users access the dropdown via keyboard as per\n        \/\/ guidelines defined in w3 aria practices 1.1 menu-button.\n        if (e.target.matches('[data-toggle=\"dropdown\"]')) {\n            handleMenuButton(e);\n        }\n\n        if (e.target.matches('.dropdown [role=\"menu\"] [role=\"menuitem\"]')) {\n            const trigger = e.key;\n            let next = false;\n            const menu = e.target.closest('[role=\"menu\"]');\n\n            if (!menu) {\n                return;\n            }\n            const menuItems = menu.querySelectorAll('[role=\"menuitem\"]');\n            if (!menuItems) {\n                return;\n            }\n            \/\/ Down key.\n            if (trigger == 'ArrowDown') {\n                for (let i = 0; i < menuItems.length - 1; i++) {\n                    if (menuItems[i] == e.target) {\n                        next = menuItems[i + 1];\n                        break;\n                    }\n                }\n                if (!next) {\n                    \/\/ Wrap to first item.\n                    next = menuItems[0];\n                }\n            } else if (trigger == 'ArrowUp') {\n                \/\/ Up key.\n                for (let i = 1; i < menuItems.length; i++) {\n                    if (menuItems[i] == e.target) {\n                        next = menuItems[i - 1];\n                        break;\n                    }\n                }\n                if (!next) {\n                    \/\/ Wrap to last item.\n                    next = menuItems[menuItems.length - 1];\n                }\n            } else if (trigger == 'Home') {\n                \/\/ Home key.\n                next = menuItems[0];\n\n            } else if (trigger == 'End') {\n                \/\/ End key.\n                next = menuItems[menuItems.length - 1];\n            }\n\n            \/\/ Variable next is set if we do want to act on the keypress.\n            if (next) {\n                e.preventDefault();\n                shiftFocus(next);\n            }\n            return;\n        }\n    });\n\n    $('.dropdown').on('hidden.bs.dropdown', e => {\n        \/\/ We need to focus on the menu trigger.\n        const trigger = e.target.querySelector('[data-toggle=\"dropdown\"]');\n        const focused = document.activeElement != document.body ? document.activeElement : null;\n        if (trigger && focused && e.target.contains(focused)) {\n            shiftFocus(trigger);\n        }\n    });\n};\n\n\/**\n * After page load, focus on any element with special autofocus attribute.\n *\/\nconst autoFocus = () => {\n    window.addEventListener(\"load\", () => {\n        const alerts = document.querySelectorAll('[data-aria-autofocus=\"true\"][role=\"alert\"]');\n        Array.prototype.forEach.call(alerts, autofocusElement => {\n            \/\/ According to the specification an role=\"alert\" region is only read out on change to the content\n            \/\/ of that region.\n            autofocusElement.innerHTML += ' ';\n            autofocusElement.removeAttribute('data-aria-autofocus');\n        });\n    });\n};\n\n\/**\n * Changes the focus to the correct tab based on the key that is pressed.\n * @param {KeyboardEvent} e\n *\/\nconst updateTabFocus = e => {\n    const tabList = e.target.closest('[role=\"tablist\"]');\n    const vertical = tabList.getAttribute('aria-orientation') == 'vertical';\n    const rtl = window.right_to_left();\n    const arrowNext = vertical ? 'ArrowDown' : (rtl ? 'ArrowLeft' : 'ArrowRight');\n    const arrowPrevious = vertical ? 'ArrowUp' : (rtl ? 'ArrowRight' : 'ArrowLeft');\n    const tabs = Array.prototype.filter.call(\n        tabList.querySelectorAll('[role=\"tab\"]'),\n        tab => !!tab.offsetHeight); \/\/ We only work with the visible tabs.\n\n    for (let i = 0; i < tabs.length; i++) {\n        tabs[i].index = i;\n    }\n\n    switch (e.key) {\n        case arrowNext:\n            e.preventDefault();\n            if (e.target.index !== undefined && tabs[e.target.index + 1]) {\n                tabs[e.target.index + 1].focus();\n            } else {\n                tabs[0].focus();\n            }\n            break;\n        case arrowPrevious:\n            e.preventDefault();\n            if (e.target.index !== undefined && tabs[e.target.index - 1]) {\n                tabs[e.target.index - 1].focus();\n            } else {\n                tabs[tabs.length - 1].focus();\n            }\n            break;\n        case 'Home':\n            e.preventDefault();\n            tabs[0].focus();\n            break;\n        case 'End':\n            e.preventDefault();\n            tabs[tabs.length - 1].focus();\n    }\n};\n\n\/**\n * Fix accessibility issues regarding tab elements focus and their tab order in Bootstrap navs.\n *\/\nconst tabElementFix = () => {\n    document.addEventListener('keydown', e => {\n        if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'Home', 'End'].includes(e.key)) {\n            if (e.target.matches('[role=\"tablist\"] [role=\"tab\"]')) {\n                updateTabFocus(e);\n            }\n        }\n    });\n\n    document.addEventListener('click', e => {\n        if (e.target.matches('[role=\"tablist\"] [data-toggle=\"tab\"], [role=\"tablist\"] [data-toggle=\"pill\"]')) {\n            const tabs = e.target.closest('[role=\"tablist\"]').querySelectorAll('[data-toggle=\"tab\"], [data-toggle=\"pill\"]');\n            e.preventDefault();\n            $(e.target).tab('show');\n            tabs.forEach(tab => {\n                tab.tabIndex = -1;\n            });\n            e.target.tabIndex = 0;\n        }\n    });\n};\n\n\/**\n * Fix keyboard interaction with Bootstrap Collapse elements.\n *\n * @see {@link https:\/\/www.w3.org\/TR\/wai-aria-practices-1.1\/#disclosure|WAI-ARIA Authoring Practices 1.1 - Disclosure (Show\/Hide)}\n *\/\nconst collapseFix = () => {\n    document.addEventListener('keydown', e => {\n        if (e.target.matches('[data-toggle=\"collapse\"]')) {\n            \/\/ Pressing space should toggle expand\/collapse.\n            if (e.key === ' ') {\n                e.preventDefault();\n                e.target.click();\n            }\n        }\n    });\n};\n\nexport const init = () => {\n    dropdownFix();\n    autoFocus();\n    tabElementFix();\n    collapseFix();\n};\n"],"names":["dropdownFix","focusEnd","setFocusEnd","end","shiftFocus","element","setTimeout","pendingPromise","focus","resolve","Pending","handleMenuButton","e","trigger","key","fixFocus","preventDefault","target","click","menu","parentElement","querySelector","menuItems","foundMenuItem","querySelectorAll","length","result","getFocusEnd","document","addEventListener","matches","closest","toLowerCase","i","item","text","trim","indexOf","next","on","focused","activeElement","body","contains","tabElementFix","includes","tabList","vertical","getAttribute","rtl","window","right_to_left","arrowNext","arrowPrevious","tabs","Array","prototype","filter","call","tab","offsetHeight","index","undefined","updateTabFocus","forEach","tabIndex","alerts","autofocusElement","innerHTML","removeAttribute"],"mappings":";;;;;;;0KA6BMA,YAAc,SACZC,UAAW,QACTC,YAAc,eAACC,+DACjBF,SAAWE,KASTC,WAAaC,UAKfC,YAJqBC,iBACjBF,QAAQG,QACRD,eAAeE,YAEM,GAAI,IAAIC,iBAAQ,6BAIvCC,iBAAmBC,UACfC,QAAUD,EAAEE,QACdC,UAAW,KAGC,MAAZF,SAA+B,UAAZA,UACnBE,UAAW,EAEXH,EAAEI,iBAEFJ,EAAEK,OAAOC,SAIG,YAAZL,SAAqC,cAAZA,UACzBE,UAAW,IAGVA,sBAMCI,KAAOP,EAAEK,OAAOG,cAAcC,cAAc,qBAC9CC,WAAY,EACZC,eAAgB,EAEhBJ,OACAG,UAAYH,KAAKK,iBAAiB,sBAElCF,WAAaA,UAAUG,OAAS,IAEhB,YAAZZ,QACAX,cAEAA,aAAY,GAIZqB,cAxDQ,YACVG,OAASzB,gBACfA,UAAW,EACJyB,QAoDCC,GACgBL,UAAUA,UAAUG,OAAS,GAG7BH,UAAU,IAI9BC,eACAnB,WAAWmB,gBAMnBK,SAASC,iBAAiB,YAAYjB,OAC9BA,EAAEK,OAAOa,QAAQ,6CAA8C,OACzDX,KAAOP,EAAEK,OAAOc,QAAQ,qBACzBZ,kBAGCG,UAAYH,KAAKK,iBAAiB,yBACnCF,uBAICT,QAAUD,EAAEE,IAAIkB,kBAEjB,IAAIC,EAAI,EAAGA,EAAIX,UAAUG,OAAQQ,IAAK,OACjCC,KAAOZ,UAAUW,MAEU,GADhBC,KAAKC,KAAKC,OAAOJ,cACrBK,QAAQxB,SAAe,CAChCT,WAAW8B,kBAQ3BN,SAASC,iBAAiB,WAAWjB,OAI7BA,EAAEK,OAAOa,QAAQ,6BACjBnB,iBAAiBC,GAGjBA,EAAEK,OAAOa,QAAQ,oDACXjB,QAAUD,EAAEE,QACdwB,MAAO,QACLnB,KAAOP,EAAEK,OAAOc,QAAQ,qBAEzBZ,kBAGCG,UAAYH,KAAKK,iBAAiB,yBACnCF,oBAIU,aAAXT,QAAwB,KACnB,IAAIoB,EAAI,EAAGA,EAAIX,UAAUG,OAAS,EAAGQ,OAClCX,UAAUW,IAAMrB,EAAEK,OAAQ,CAC1BqB,KAAOhB,UAAUW,EAAI,SAIxBK,OAEDA,KAAOhB,UAAU,SAElB,GAAe,WAAXT,QAAsB,KAExB,IAAIoB,EAAI,EAAGA,EAAIX,UAAUG,OAAQQ,OAC9BX,UAAUW,IAAMrB,EAAEK,OAAQ,CAC1BqB,KAAOhB,UAAUW,EAAI,SAIxBK,OAEDA,KAAOhB,UAAUA,UAAUG,OAAS,QAEtB,QAAXZ,QAEPyB,KAAOhB,UAAU,GAEC,OAAXT,UAEPyB,KAAOhB,UAAUA,UAAUG,OAAS,IAIpCa,OACA1B,EAAEI,iBACFZ,WAAWkC,oCAMrB,aAAaC,GAAG,sBAAsB3B,UAE9BC,QAAUD,EAAEK,OAAOI,cAAc,4BACjCmB,QAAUZ,SAASa,eAAiBb,SAASc,KAAOd,SAASa,cAAgB,KAC\/E5B,SAAW2B,SAAW5B,EAAEK,OAAO0B,SAASH,UACxCpC,WAAWS,aAoEjB+B,cAAgB,KAClBhB,SAASC,iBAAiB,WAAWjB,IAC7B,CAAC,UAAW,YAAa,YAAa,aAAc,OAAQ,OAAOiC,SAASjC,EAAEE,MAC1EF,EAAEK,OAAOa,QAAQ,kCA\/CVlB,CAAAA,UACbkC,QAAUlC,EAAEK,OAAOc,QAAQ,oBAC3BgB,SAAuD,YAA5CD,QAAQE,aAAa,oBAChCC,IAAMC,OAAOC,gBACbC,UAAYL,SAAW,YAAeE,IAAM,YAAc,aAC1DI,cAAgBN,SAAW,UAAaE,IAAM,aAAe,YAC7DK,KAAOC,MAAMC,UAAUC,OAAOC,KAChCZ,QAAQtB,iBAAiB,iBACzBmC,OAASA,IAAIC,mBAEZ,IAAI3B,EAAI,EAAGA,EAAIqB,KAAK7B,OAAQQ,IAC7BqB,KAAKrB,GAAG4B,MAAQ5B,SAGZrB,EAAEE,UACDsC,UACDxC,EAAEI,sBACqB8C,IAAnBlD,EAAEK,OAAO4C,OAAuBP,KAAK1C,EAAEK,OAAO4C,MAAQ,GACtDP,KAAK1C,EAAEK,OAAO4C,MAAQ,GAAGrD,QAEzB8C,KAAK,GAAG9C,mBAGX6C,cACDzC,EAAEI,sBACqB8C,IAAnBlD,EAAEK,OAAO4C,OAAuBP,KAAK1C,EAAEK,OAAO4C,MAAQ,GACtDP,KAAK1C,EAAEK,OAAO4C,MAAQ,GAAGrD,QAEzB8C,KAAKA,KAAK7B,OAAS,GAAGjB,kBAGzB,OACDI,EAAEI,iBACFsC,KAAK,GAAG9C,kBAEP,MACDI,EAAEI,iBACFsC,KAAKA,KAAK7B,OAAS,GAAGjB,UAWlBuD,CAAenD,MAK3BgB,SAASC,iBAAiB,SAASjB,OAC3BA,EAAEK,OAAOa,QAAQ,+EAAgF,OAC3FwB,KAAO1C,EAAEK,OAAOc,QAAQ,oBAAoBP,iBAAiB,6CACnEZ,EAAEI,qCACAJ,EAAEK,QAAQ0C,IAAI,QAChBL,KAAKU,SAAQL,MACTA,IAAIM,UAAY,KAEpBrD,EAAEK,OAAOgD,SAAW,qBAsBZ,KAChBjE,cAnGAkD,OAAOrB,iBAAiB,QAAQ,WACtBqC,OAAStC,SAASJ,iBAAiB,8CACzC+B,MAAMC,UAAUQ,QAAQN,KAAKQ,QAAQC,mBAGjCA,iBAAiBC,WAAa,IAC9BD,iBAAiBE,gBAAgB,6BA+FzCzB,gBAdAhB,SAASC,iBAAiB,WAAWjB,IAC7BA,EAAEK,OAAOa,QAAQ,6BAEH,MAAVlB,EAAEE,MACFF,EAAEI,iBACFJ,EAAEK,OAAOC"}