source: trip-planner-front/node_modules/@angular/cdk/a11y/input-modality/input-modality-detector.d.ts.map@ 6a3a178

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Null is used if the input modality is unknown.\n */\nexport declare type InputModality = 'keyboard' | 'mouse' | 'touch' | null;\n/** Options to configure the behavior of the InputModalityDetector. */\nexport interface InputModalityDetectorOptions {\n    /** Keys to ignore when detecting keyboard input modality. */\n    ignoreKeys?: number[];\n}\n/**\n * Injectable options for the InputModalityDetector. These are shallowly merged with the default\n * options.\n */\nexport declare const INPUT_MODALITY_DETECTOR_OPTIONS: InjectionToken<InputModalityDetectorOptions>;\n/**\n * Default options for the InputModalityDetector.\n *\n * Modifier keys are ignored by default (i.e. when pressed won't cause the service to detect\n * keyboard input modality) for two reasons:\n *\n * 1. Modifier keys are commonly used with mouse to perform actions such as 'right click' or 'open\n *    in new tab', and are thus less representative of actual keyboard interaction.\n * 2. VoiceOver triggers some keyboard events when linearly navigating with Control + Option (but\n *    confusingly not with Caps Lock). Thus, to have parity with other screen readers, we ignore\n *    these keys so as to not update the input modality.\n *\n * Note that we do not by default ignore the right Meta key on Safari because it has the same key\n * code as the ContextMenu key on other browsers. When we switch to using event.key, we can\n * distinguish between the two.\n */\nexport declare const INPUT_MODALITY_DETECTOR_DEFAULT_OPTIONS: InputModalityDetectorOptions;\n/**\n * The amount of time needed to pass after a touchstart event in order for a subsequent mousedown\n * event to be attributed as mouse and not touch.\n *\n * This is the value used by AngularJS Material. Through trial and error (on iPhone 6S) they found\n * that a value of around 650ms seems appropriate.\n */\nexport declare const TOUCH_BUFFER_MS = 650;\n/**\n * Service that detects the user's input modality.\n *\n * This service does not update the input modality when a user navigates with a screen reader\n * (e.g. linear navigation with VoiceOver, object navigation / browse mode with NVDA, virtual PC\n * cursor mode with JAWS). This is in part due to technical limitations (i.e. keyboard events do not\n * fire as expected in these modes) but is also arguably the correct behavior. Navigating with a\n * screen reader is akin to visually scanning a page, and should not be interpreted as actual user\n * input interaction.\n *\n * When a user is not navigating but *interacting* with a screen reader, this service attempts to\n * update the input modality to keyboard, but in general this service's behavior is largely\n * undefined.\n */\nexport declare class InputModalityDetector implements OnDestroy {\n    private readonly _platform;\n    /** Emits whenever an input modality is detected. */\n    readonly modalityDetected: Observable<InputModality>;\n    /** Emits when the input modality changes. */\n    readonly modalityChanged: Observable<InputModality>;\n    /** The most recently detected input modality. */\n    get mostRecentModality(): InputModality;\n    /**\n     * The most recently detected input modality event target. Is null if no input modality has been\n     * detected or if the associated event target is null for some unknown reason.\n     */\n    _mostRecentTarget: HTMLElement | null;\n    /** The underlying BehaviorSubject that emits whenever an input modality is detected. */\n    private readonly _modality;\n    /** Options for this InputModalityDetector. */\n    private readonly _options;\n    /**\n     * The timestamp of the last touch input modality. Used to determine whether mousedown events\n     * should be attributed to mouse or touch.\n     */\n    private _lastTouchMs;\n    /**\n     * Handles keydown events. Must be an arrow function in order to preserve the context when it gets\n     * bound.\n     */\n    private _onKeydown;\n    /**\n     * Handles mousedown events. Must be an arrow function in order to preserve the context when it\n     * gets bound.\n     */\n    private _onMousedown;\n    /**\n     * Handles touchstart events. Must be an arrow function in order to preserve the context when it\n     * gets bound.\n     */\n    private _onTouchstart;\n    constructor(_platform: Platform, ngZone: NgZone, document: Document, options?: InputModalityDetectorOptions);\n    ngOnDestroy(): void;\n}\n"]}