import type { EventData } from '../data/observable';
import { Observable } from '../data/observable';
import type { View } from '../ui/core/view';
import type { Page } from '../ui/page';
export declare const accessibilityBlurEvent = "accessibilityBlur";
export declare const accessibilityFocusEvent = "accessibilityFocus";
export declare const accessibilityFocusChangedEvent = "accessibilityFocusChanged";
export declare const accessibilityPerformEscapeEvent = "accessibilityPerformEscape";
/**
 * Send notification when accessibility focus state changes.
 * If either receivedFocus or lostFocus is true, 'accessibilityFocusChanged' is send with value true if element received focus
 * If receivedFocus, 'accessibilityFocus' is send
 * if lostFocus, 'accessibilityBlur' is send
 *
 * @param {View} view
 * @param {boolean} receivedFocus
 * @param {boolean} lostFocus
 */
export declare function notifyAccessibilityFocusState(view: View, receivedFocus: boolean, lostFocus: boolean): void;
export declare function getLastFocusedViewOnPage(page: Page): View | null;
export declare class SharedA11YObservable extends Observable {
    accessibilityServiceEnabled?: boolean;
}
export declare const AccessibilityServiceEnabledPropName = "accessibilityServiceEnabled";
export declare class CommonA11YServiceEnabledObservable extends SharedA11YObservable {
    constructor(sharedA11YObservable: SharedA11YObservable);
}
export declare function isA11yEnabled(): boolean;
export declare function setA11yEnabled(value: boolean): void;
export declare function enforceArray(val: string | string[]): string[];
export declare const VALID_FONT_SCALES: number[];
export declare function getClosestValidFontScale(fontScale: number): number;
export declare enum FontScaleCategory {
    ExtraSmall = "extra-small",
    Medium = "medium",
    ExtraLarge = "extra-large"
}
export declare const fontScaleExtraSmallCategoryClass = "a11y-fontscale-xs";
export declare const fontScaleMediumCategoryClass = "a11y-fontscale-m";
export declare const fontScaleExtraLargeCategoryClass = "a11y-fontscale-xl";
export declare const fontScaleCategoryClasses: string[];
export declare const a11yServiceEnabledClass = "a11y-service-enabled";
export declare const a11yServiceDisabledClass = "a11y-service-disabled";
export declare const a11yServiceClasses: string[];
export declare function setFontScale(scale: number): void;
export declare function getFontScale(): number;
export declare function getFontScaleCategory(): FontScaleCategory;
export declare function setInitAccessibilityCssHelper(callback: () => void): void;
export declare function readyInitAccessibilityCssHelper(): void;
export declare function setInitFontScale(callback: () => void): void;
export declare function readyInitFontScale(): void;
export declare function setFontScaleCssClasses(value: Map<number, string>): void;
export declare function getFontScaleCssClasses(): Map<number, string>;
export declare function setCurrentFontScaleClass(value: string): void;
export declare function getCurrentFontScaleClass(): string;
export declare function setCurrentFontScaleCategory(value: string): void;
export declare function getCurrentFontScaleCategory(): string;
export declare function setCurrentA11YServiceClass(value: string): void;
export declare function getCurrentA11YServiceClass(): string;
export declare enum AccessibilityTrait {
    /**
     * The element allows direct touch interaction for VoiceOver users.
     */
    AllowsDirectInteraction = "allowsDirectInteraction",
    /**
     * The element should cause an automatic page turn when VoiceOver finishes reading the text within it.
     * Note: Requires custom view with accessibilityScroll(...)
     */
    CausesPageTurn = "pageTurn",
    /**
     * The element is not enabled and does not respond to user interaction.
     */
    NotEnabled = "disabled",
    /**
     * The element is currently selected.
     */
    Selected = "selected",
    /**
     * The element frequently updates its label or value.
     */
    UpdatesFrequently = "frequentUpdates"
}
export declare enum AccessibilityRole {
    /**
     * The element allows continuous adjustment through a range of values.
     */
    Adjustable = "adjustable",
    /**
     * The element should be treated as a button.
     */
    Button = "button",
    /**
     * The element behaves like a Checkbox
     */
    Checkbox = "checkbox",
    /**
     * The element is a header that divides content into sections, such as the title of a navigation bar.
     */
    Header = "header",
    /**
     * The element should be treated as an image.
     */
    Image = "image",
    /**
     * The element should be treated as a image button.
     */
    ImageButton = "imageButton",
    /**
     * The element behaves as a keyboard key.
     */
    KeyboardKey = "keyboardKey",
    /**
     * The element should be treated as a link.
     */
    Link = "link",
    /**
     * The element has no traits.
     */
    None = "none",
    /**
     * The element plays its own sound when activated.
     */
    PlaysSound = "plays",
    /**
     * The element behaves like a ProgressBar
     */
    ProgressBar = "progressBar",
    /**
     * The element behaves like a RadioButton
     */
    RadioButton = "radioButton",
    /**
     * The element should be treated as a search field.
     */
    Search = "search",
    /**
     * The element behaves like a SpinButton
     */
    SpinButton = "spinButton",
    /**
     * The element starts a media session when it is activated.
     */
    StartsMediaSession = "startsMedia",
    /**
     * The element should be treated as static text that cannot change.
     */
    StaticText = "text",
    /**
     * The element provides summary information when the application starts.
     */
    Summary = "summary",
    /**
     * The element behaves like a switch
     */
    Switch = "switch"
}
export declare enum AccessibilityState {
    Selected = "selected",
    Checked = "checked",
    Unchecked = "unchecked",
    Disabled = "disabled"
}
export declare enum AccessibilityLiveRegion {
    None = "none",
    Polite = "polite",
    Assertive = "assertive"
}
export declare enum IOSPostAccessibilityNotificationType {
    Announcement = "announcement",
    Screen = "screen",
    Layout = "layout"
}
export declare enum AndroidAccessibilityEvent {
    /**
     * Invalid selection/focus position.
     */
    INVALID_POSITION = "invalid_position",
    /**
     * Maximum length of the text fields.
     */
    MAX_TEXT_LENGTH = "max_text_length",
    /**
     * Represents the event of clicking on a android.view.View like android.widget.Button, android.widget.CompoundButton, etc.
     */
    VIEW_CLICKED = "view_clicked",
    /**
     * Represents the event of long clicking on a android.view.View like android.widget.Button, android.widget.CompoundButton, etc.
     */
    VIEW_LONG_CLICKED = "view_long_clicked",
    /**
     * Represents the event of selecting an item usually in the context of an android.widget.AdapterView.
     */
    VIEW_SELECTED = "view_selected",
    /**
     * Represents the event of setting input focus of a android.view.View.
     */
    VIEW_FOCUSED = "view_focused",
    /**
     * Represents the event of changing the text of an android.widget.EditText.
     */
    VIEW_TEXT_CHANGED = "view_text_changed",
    /**
     * Represents the event of opening a android.widget.PopupWindow, android.view.Menu, android.app.Dialog, etc.
     */
    WINDOW_STATE_CHANGED = "window_state_changed",
    /**
     * Represents the event showing a android.app.Notification.
     */
    NOTIFICATION_STATE_CHANGED = "notification_state_changed",
    /**
     * Represents the event of a hover enter over a android.view.View.
     */
    VIEW_HOVER_ENTER = "view_hover_enter",
    /**
     * Represents the event of a hover exit over a android.view.View.
     */
    VIEW_HOVER_EXIT = "view_hover_exit",
    /**
     * Represents the event of starting a touch exploration gesture.
     */
    TOUCH_EXPLORATION_GESTURE_START = "touch_exploration_gesture_start",
    /**
     * Represents the event of ending a touch exploration gesture.
     */
    TOUCH_EXPLORATION_GESTURE_END = "touch_exploration_gesture_end",
    /**
     * Represents the event of changing the content of a window and more specifically the sub-tree rooted at the event's source.
     */
    WINDOW_CONTENT_CHANGED = "window_content_changed",
    /**
     * Represents the event of scrolling a view.
     */
    VIEW_SCROLLED = "view_scrolled",
    /**
     * Represents the event of changing the selection in an android.widget.EditText.
     */
    VIEW_TEXT_SELECTION_CHANGED = "view_text_selection_changed",
    /**
     * Represents the event of an application making an announcement.
     */
    ANNOUNCEMENT = "announcement",
    /**
     * Represents the event of gaining accessibility focus.
     */
    VIEW_ACCESSIBILITY_FOCUSED = "view_accessibility_focused",
    /**
     * Represents the event of clearing accessibility focus.
     */
    VIEW_ACCESSIBILITY_FOCUS_CLEARED = "view_accessibility_focus_cleared",
    /**
     * Represents the event of traversing the text of a view at a given movement granularity.
     */
    VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY = "view_text_traversed_at_movement_granularity",
    /**
     * Represents the event of beginning gesture detection.
     */
    GESTURE_DETECTION_START = "gesture_detection_start",
    /**
     * Represents the event of ending gesture detection.
     */
    GESTURE_DETECTION_END = "gesture_detection_end",
    /**
     * Represents the event of the user starting to touch the screen.
     */
    TOUCH_INTERACTION_START = "touch_interaction_start",
    /**
     * Represents the event of the user ending to touch the screen.
     */
    TOUCH_INTERACTION_END = "touch_interaction_end",
    /**
     * Mask for AccessibilityEvent all types.
     */
    ALL_MASK = "all"
}
export interface AccessibilityEventPerformEscape extends EventData {
    cancel?: boolean;
}
export interface AccessibilityEventOptions {
    androidAccessibilityEvent?: AndroidAccessibilityEvent;
    iosNotificationType?: IOSPostAccessibilityNotificationType;
    message?: string;
}