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{"version":3,"file":"focustrap.js","sources":["../../src/util/focustrap.js"],"sourcesContent":["/**\n * --------------------------------------------------------------------------\n * Bootstrap util/focustrap.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nimport EventHandler from '../dom/event-handler.js'\nimport SelectorEngine from '../dom/selector-engine.js'\nimport Config from './config.js'\n\n/**\n * Constants\n */\n\nconst NAME = 'focustrap'\nconst DATA_KEY = 'bs.focustrap'\nconst EVENT_KEY = `.${DATA_KEY}`\nconst EVENT_FOCUSIN = `focusin${EVENT_KEY}`\nconst EVENT_KEYDOWN_TAB = `keydown.tab${EVENT_KEY}`\n\nconst TAB_KEY = 'Tab'\nconst TAB_NAV_FORWARD = 'forward'\nconst TAB_NAV_BACKWARD = 'backward'\n\nconst Default = {\n  autofocus: true,\n  trapElement: null // The element to trap focus inside of\n}\n\nconst DefaultType = {\n  autofocus: 'boolean',\n  trapElement: 'element'\n}\n\n/**\n * Class definition\n */\n\nclass FocusTrap extends Config {\n  constructor(config) {\n    super()\n    this._config = this._getConfig(config)\n    this._isActive = false\n    this._lastTabNavDirection = null\n  }\n\n  // Getters\n  static get Default() {\n    return Default\n  }\n\n  static get DefaultType() {\n    return DefaultType\n  }\n\n  static get NAME() {\n    return NAME\n  }\n\n  // Public\n  activate() {\n    if (this._isActive) {\n      return\n    }\n\n    if (this._config.autofocus) {\n      this._config.trapElement.focus()\n    }\n\n    EventHandler.off(document, EVENT_KEY) // guard against infinite focus loop\n    EventHandler.on(document, EVENT_FOCUSIN, event => this._handleFocusin(event))\n    EventHandler.on(document, EVENT_KEYDOWN_TAB, event => this._handleKeydown(event))\n\n    this._isActive = true\n  }\n\n  deactivate() {\n    if (!this._isActive) {\n      return\n    }\n\n    this._isActive = false\n    EventHandler.off(document, EVENT_KEY)\n  }\n\n  // Private\n  _handleFocusin(event) {\n    const { trapElement } = this._config\n\n    if (event.target === document || event.target === trapElement || trapElement.contains(event.target)) {\n      return\n    }\n\n    const elements = SelectorEngine.focusableChildren(trapElement)\n\n    if (elements.length === 0) {\n      trapElement.focus()\n    } else if (this._lastTabNavDirection === TAB_NAV_BACKWARD) {\n      elements[elements.length - 1].focus()\n    } else {\n      elements[0].focus()\n    }\n  }\n\n  _handleKeydown(event) {\n    if (event.key !== TAB_KEY) {\n      return\n    }\n\n    this._lastTabNavDirection = event.shiftKey ? TAB_NAV_BACKWARD : TAB_NAV_FORWARD\n  }\n}\n\nexport default FocusTrap\n"],"names":["NAME","DATA_KEY","EVENT_KEY","EVENT_FOCUSIN","EVENT_KEYDOWN_TAB","TAB_KEY","TAB_NAV_FORWARD","TAB_NAV_BACKWARD","Default","autofocus","trapElement","DefaultType","FocusTrap","Config","constructor","config","_config","_getConfig","_isActive","_lastTabNavDirection","activate","focus","EventHandler","off","document","on","event","_handleFocusin","_handleKeydown","deactivate","target","contains","elements","SelectorEngine","focusableChildren","length","key","shiftKey"],"mappings":";;;;;;;;;;;EAAA;EACA;EACA;EACA;EACA;EACA;;;EAMA;EACA;EACA;;EAEA,MAAMA,IAAI,GAAG,WAAW,CAAA;EACxB,MAAMC,QAAQ,GAAG,cAAc,CAAA;EAC/B,MAAMC,SAAS,GAAI,CAAGD,CAAAA,EAAAA,QAAS,CAAC,CAAA,CAAA;EAChC,MAAME,aAAa,GAAI,CAASD,OAAAA,EAAAA,SAAU,CAAC,CAAA,CAAA;EAC3C,MAAME,iBAAiB,GAAI,CAAaF,WAAAA,EAAAA,SAAU,CAAC,CAAA,CAAA;EAEnD,MAAMG,OAAO,GAAG,KAAK,CAAA;EACrB,MAAMC,eAAe,GAAG,SAAS,CAAA;EACjC,MAAMC,gBAAgB,GAAG,UAAU,CAAA;EAEnC,MAAMC,OAAO,GAAG;EACdC,EAAAA,SAAS,EAAE,IAAI;IACfC,WAAW,EAAE,IAAI;EACnB,CAAC,CAAA;EAED,MAAMC,WAAW,GAAG;EAClBF,EAAAA,SAAS,EAAE,SAAS;EACpBC,EAAAA,WAAW,EAAE,SAAA;EACf,CAAC,CAAA;;EAED;EACA;EACA;;EAEA,MAAME,SAAS,SAASC,MAAM,CAAC;IAC7BC,WAAWA,CAACC,MAAM,EAAE;EAClB,IAAA,KAAK,EAAE,CAAA;MACP,IAAI,CAACC,OAAO,GAAG,IAAI,CAACC,UAAU,CAACF,MAAM,CAAC,CAAA;MACtC,IAAI,CAACG,SAAS,GAAG,KAAK,CAAA;MACtB,IAAI,CAACC,oBAAoB,GAAG,IAAI,CAAA;EAClC,GAAA;;EAEA;IACA,WAAWX,OAAOA,GAAG;EACnB,IAAA,OAAOA,OAAO,CAAA;EAChB,GAAA;IAEA,WAAWG,WAAWA,GAAG;EACvB,IAAA,OAAOA,WAAW,CAAA;EACpB,GAAA;IAEA,WAAWX,IAAIA,GAAG;EAChB,IAAA,OAAOA,IAAI,CAAA;EACb,GAAA;;EAEA;EACAoB,EAAAA,QAAQA,GAAG;MACT,IAAI,IAAI,CAACF,SAAS,EAAE;EAClB,MAAA,OAAA;EACF,KAAA;EAEA,IAAA,IAAI,IAAI,CAACF,OAAO,CAACP,SAAS,EAAE;EAC1B,MAAA,IAAI,CAACO,OAAO,CAACN,WAAW,CAACW,KAAK,EAAE,CAAA;EAClC,KAAA;EAEAC,IAAAA,YAAY,CAACC,GAAG,CAACC,QAAQ,EAAEtB,SAAS,CAAC,CAAC;EACtCoB,IAAAA,YAAY,CAACG,EAAE,CAACD,QAAQ,EAAErB,aAAa,EAAEuB,KAAK,IAAI,IAAI,CAACC,cAAc,CAACD,KAAK,CAAC,CAAC,CAAA;EAC7EJ,IAAAA,YAAY,CAACG,EAAE,CAACD,QAAQ,EAAEpB,iBAAiB,EAAEsB,KAAK,IAAI,IAAI,CAACE,cAAc,CAACF,KAAK,CAAC,CAAC,CAAA;MAEjF,IAAI,CAACR,SAAS,GAAG,IAAI,CAAA;EACvB,GAAA;EAEAW,EAAAA,UAAUA,GAAG;EACX,IAAA,IAAI,CAAC,IAAI,CAACX,SAAS,EAAE;EACnB,MAAA,OAAA;EACF,KAAA;MAEA,IAAI,CAACA,SAAS,GAAG,KAAK,CAAA;EACtBI,IAAAA,YAAY,CAACC,GAAG,CAACC,QAAQ,EAAEtB,SAAS,CAAC,CAAA;EACvC,GAAA;;EAEA;IACAyB,cAAcA,CAACD,KAAK,EAAE;MACpB,MAAM;EAAEhB,MAAAA,WAAAA;OAAa,GAAG,IAAI,CAACM,OAAO,CAAA;MAEpC,IAAIU,KAAK,CAACI,MAAM,KAAKN,QAAQ,IAAIE,KAAK,CAACI,MAAM,KAAKpB,WAAW,IAAIA,WAAW,CAACqB,QAAQ,CAACL,KAAK,CAACI,MAAM,CAAC,EAAE;EACnG,MAAA,OAAA;EACF,KAAA;EAEA,IAAA,MAAME,QAAQ,GAAGC,cAAc,CAACC,iBAAiB,CAACxB,WAAW,CAAC,CAAA;EAE9D,IAAA,IAAIsB,QAAQ,CAACG,MAAM,KAAK,CAAC,EAAE;QACzBzB,WAAW,CAACW,KAAK,EAAE,CAAA;EACrB,KAAC,MAAM,IAAI,IAAI,CAACF,oBAAoB,KAAKZ,gBAAgB,EAAE;QACzDyB,QAAQ,CAACA,QAAQ,CAACG,MAAM,GAAG,CAAC,CAAC,CAACd,KAAK,EAAE,CAAA;EACvC,KAAC,MAAM;EACLW,MAAAA,QAAQ,CAAC,CAAC,CAAC,CAACX,KAAK,EAAE,CAAA;EACrB,KAAA;EACF,GAAA;IAEAO,cAAcA,CAACF,KAAK,EAAE;EACpB,IAAA,IAAIA,KAAK,CAACU,GAAG,KAAK/B,OAAO,EAAE;EACzB,MAAA,OAAA;EACF,KAAA;MAEA,IAAI,CAACc,oBAAoB,GAAGO,KAAK,CAACW,QAAQ,GAAG9B,gBAAgB,GAAGD,eAAe,CAAA;EACjF,GAAA;EACF;;;;;;;;"}