{"version":3,"sources":["https:\/\/immet-dist.spbstu.ru\/theme\/mooc\/amd\/src\/aria.js"],"names":["define","$","Pending","init","focusEnd","keydown","e","expanded","trigger","which","keyCode","target","attr","preventDefault","click","shiftFocus","element","delayedFocus","pendingPromise","this","focus","resolve","bind","setTimeout","on","result","menu","find","menuItems","foundMenuItem","length","keypress","item","String","fromCharCode","closest","i","toLowerCase","text","trim","indexOf","next","window","alerts"],"mappings":"AAsBA,aAEAA,OAAO,CAAC,SAAU,gBAAiB,SAAUC,EAAGC,GAC9C,MAAO,CACLC,KAAM,WAEJ,IAAIC,GAAW,EAWfH,EAAE,4BAA4BI,QAAQ,SAAUC,GAC9C,IACIC,EADAC,EAAUF,EAAEG,OAASH,EAAEI,QAGZ,IAAXF,IAbJJ,GAAW,GAmBI,IAAXI,IACFD,EAAWN,EAAEK,EAAEK,QAAQC,KAAK,iBAC5BN,EAAEO,iBAEc,SAAZN,GACFN,EAAEK,EAAEK,QAAQG,SAKD,IAAXN,GAA4B,IAAXA,IAEnBF,EAAEO,iBAEFZ,EAAEK,EAAEK,QAAQG,WAIhB,IAAIC,EAAa,SAAoBC,GACnC,IAAIC,EAAe,SAAUC,GAC3BjB,EAAEkB,MAAMC,QACRF,EAAeG,WACfC,KAAKN,GAEPO,WAAWN,EAAc,GAAI,IAAIf,EAAQ,6BAG3CD,EAAE,aAAauB,GAAG,oBAAqB,SAAUlB,GAE\/C,IA7CImB,EA6CAC,EAAOzB,EAAEK,EAAEK,QAAQgB,KAAK,iBACxBC,GAAY,EACZC,GAAgB,EAEhBH,IACFE,EAAY3B,EAAEyB,GAAMC,KAAK,sBAGvBC,GAAaA,EAAUE,OAAS,IArDhCL,EAASrB,EACbA,GAAW,EAsDPyB,EArDGJ,EAqDaG,EAAUA,EAAUE,OAAS,GAG7BF,EAAU,IAI1BC,GACFd,EAAWc,KAKf5B,EAAE,6CAA6C8B,SAAS,SAAUzB,GAChE,IAGIsB,EACAI,EAJAxB,EAAUyB,OAAOC,aAAa5B,EAAEG,OAASH,EAAEI,SAC3CgB,EAAOzB,EAAEK,EAAEK,QAAQwB,QAAQ,iBAC3BC,EAAI,EAKR,GAAKV,IAILE,EAAY3B,EAAEyB,GAAMC,KAAK,sBAQzB,IAFAnB,EAAUA,EAAQ6B,cAEbD,EAAI,EAAGA,EAAIR,EAAUE,OAAQM,IAIhC,GAAiC,IAHjCJ,EAAO\/B,EAAE2B,EAAUQ,KACHE,OAAOC,OAAOF,cAEjBG,QAAQhC,GAAe,CAClCO,EAAWiB,GACX,SAKN\/B,EAAE,6CAA6CI,QAAQ,SAAUC,GAC\/D,IAIIsB,EAJApB,EAAUF,EAAEG,OAASH,EAAEI,QACvB+B,GAAO,EACPf,EAAOzB,EAAEK,EAAEK,QAAQwB,QAAQ,iBAC3BC,EAAI,EAGR,GAAKV,IAILE,EAAY3B,EAAEyB,GAAMC,KAAK,sBAEzB,CAKA,GAAe,IAAXnB,EAAe,CACjB,IAAK4B,EAAI,EAAGA,EAAIR,EAAUE,OAAS,EAAGM,IACpC,GAAIR,EAAUQ,IAAM9B,EAAEK,OAAQ,CAC5B8B,EAAOb,EAAUQ,EAAI,GACrB,MAICK,IAEHA,EAAOb,EAAU,SAEd,GAAe,IAAXpB,EAAe,CAExB,IAAK4B,EAAI,EAAGA,EAAIR,EAAUE,OAAQM,IAChC,GAAIR,EAAUQ,IAAM9B,EAAEK,OAAQ,CAC5B8B,EAAOb,EAAUQ,EAAI,GACrB,MAICK,IAEHA,EAAOb,EAAUA,EAAUE,OAAS,SAElB,IAAXtB,EAETiC,EAAOb,EAAU,GACG,IAAXpB,IAETiC,EAAOb,EAAUA,EAAUE,OAAS,IAIlCW,IACFnC,EAAEO,iBACFE,EAAW0B,OAKfxC,EAAE,aAAauB,GAAG,qBAAsB,SAAUlB,GAEhD,IAAIE,EAAUP,EAAEK,EAAEK,QAAQgB,KAAK,4BAE3BnB,GACFO,EAAWP,KAIfP,EAAE,WACAyC,OAAOnB,WAAW,SAAUL,GAC1B,IAAIyB,EAAS1C,EAAE,8CAEX0C,EAAOb,OAAS,IAClB7B,EAAE0C,EAAO,IAAI\/B,KAAK,WAAY,KAC9BX,EAAE0C,EAAO,IAAIvB,SAGfF,EAAeG,WACd,IAAK,IAAInB,EAAQ","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_remui\/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\"use strict\";\ndefine(['jquery', 'core\/pending'], function($, Pending) {\n    return {\n        init: function() {\n            \/\/ Drop downs from bootstrap don't support keyboard accessibility by default.\n            var focusEnd = false,\n                setFocusEnd = function() {\n                    focusEnd = true;\n                },\n                getFocusEnd = function() {\n                    var result = focusEnd;\n                    focusEnd = false;\n                    return result;\n                };\n\n            \/\/ Special handling for \"up\" keyboard control.\n            $('[data-toggle=\"dropdown\"]').keydown(function(e) {\n                var trigger = e.which || e.keyCode,\n                    expanded;\n\n                \/\/ Up key opens the menu at the end.\n                if (trigger == 38) {\n                    \/\/ Focus the end of the menu, not the beginning.\n                    setFocusEnd();\n                }\n\n                \/\/ Escape key only closes the menu, it doesn't open it.\n                if (trigger == 27) {\n                    expanded = $(e.target).attr('aria-expanded');\n                    e.preventDefault();\n                    if (expanded == \"false\") {\n                        $(e.target).click();\n                    }\n                }\n\n                \/\/ Space key or Enter key opens the menu.\n                if (trigger == 32 || trigger == 13) {\n                    \/\/ Cancel random scroll.\n                    e.preventDefault();\n                    \/\/ Open the menu instead.\n                    $(e.target).click();\n                }\n            });\n\n            \/\/ Special handling for navigation keys when menu is open.\n            var shiftFocus = function(element) {\n                var delayedFocus = function(pendingPromise) {\n                    $(this).focus();\n                    pendingPromise.resolve();\n                }.bind(element);\n                setTimeout(delayedFocus, 50, new Pending('core\/aria:delayed-focus'));\n            };\n\n            $('.dropdown').on('shown.bs.dropdown', function(e) {\n                \/\/ We need to focus on the first menuitem.\n                var menu = $(e.target).find('[role=\"menu\"]'),\n                    menuItems = false,\n                    foundMenuItem = false;\n\n                if (menu) {\n                    menuItems = $(menu).find('[role=\"menuitem\"]');\n                }\n                if (menuItems && menuItems.length > 0) {\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                if (foundMenuItem) {\n                    shiftFocus(foundMenuItem);\n                }\n            });\n            \/\/ Search for menu items by finding the first item that has\n            \/\/ text starting with the typed character (case insensitive).\n            $('.dropdown [role=\"menu\"] [role=\"menuitem\"]').keypress(function(e) {\n                var trigger = String.fromCharCode(e.which || e.keyCode),\n                    menu = $(e.target).closest('[role=\"menu\"]'),\n                    i = 0,\n                    menuItems = false,\n                    item,\n                    itemText;\n\n                if (!menu) {\n                    return;\n                }\n                menuItems = $(menu).find('[role=\"menuitem\"]');\n                if (!menuItems) {\n                    return;\n                }\n\n                trigger = trigger.toLowerCase();\n                for (i = 0; i < menuItems.length; i++) {\n                    item = $(menuItems[i]);\n                    itemText = item.text().trim().toLowerCase();\n                    if (itemText.indexOf(trigger) == 0) {\n                        shiftFocus(item);\n                        break;\n                    }\n                }\n            });\n\n            \/\/ Keyboard navigation for arrow keys, home and end keys.\n            $('.dropdown [role=\"menu\"] [role=\"menuitem\"]').keydown(function(e) {\n                var trigger = e.which || e.keyCode,\n                    next = false,\n                    menu = $(e.target).closest('[role=\"menu\"]'),\n                    i = 0,\n                    menuItems = false;\n                if (!menu) {\n                    return;\n                }\n                menuItems = $(menu).find('[role=\"menuitem\"]');\n                if (!menuItems) {\n                    return;\n                }\n                \/\/ Down key.\n                if (trigger == 40) {\n                    for (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\n                } else if (trigger == 38) {\n                    \/\/ Up key.\n                    for (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\n                } else if (trigger == 36) {\n                    \/\/ Home key.\n                    next = menuItems[0];\n\n                } else if (trigger == 35) {\n                    \/\/ End key.\n                    next = menuItems[menuItems.length - 1];\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            $('.dropdown').on('hidden.bs.dropdown', function(e) {\n                \/\/ We need to focus on the menu trigger.\n                var trigger = $(e.target).find('[data-toggle=\"dropdown\"]');\n                if (trigger) {\n                    shiftFocus(trigger);\n                }\n            });\n\n            \/\/ After page load, focus on any element with special autofocus attribute.\n            $(function() {\n                window.setTimeout(function(pendingPromise) {\n                    var alerts = $('[role=\"alert\"][data-aria-autofocus=\"true\"]');\n                    if (alerts.length > 0) {\n                        $(alerts[0]).attr('tabindex', '0');\n                        $(alerts[0]).focus();\n                    }\n                    pendingPromise.resolve();\n                }, 300, new Pending('core\/aria:delayed-focus'));\n            });\n        }\n    };\n});\n"],"file":"aria.min.js"}