pixi.js/lib/accessibility/AccessibilitySystem.mjs.map

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{"version":3,"file":"AccessibilitySystem.mjs","sources":["../../src/accessibility/AccessibilitySystem.ts"],"sourcesContent":["/* eslint-disable no-restricted-globals */\nimport { CanvasObserver } from '../dom/CanvasObserver';\nimport { FederatedEvent } from '../events/FederatedEvent';\nimport { ExtensionType } from '../extensions/Extensions';\nimport { isMobile } from '../utils/browser/isMobile';\nimport { removeItems } from '../utils/data/removeItems';\nimport { type AccessibleHTMLElement } from './accessibilityTarget';\n\nimport type { Rectangle } from '../maths/shapes/Rectangle';\nimport type { System } from '../rendering/renderers/shared/system/System';\nimport type { Renderer } from '../rendering/renderers/types';\nimport type { Container } from '../scene/container/Container';\nimport type { isMobileResult } from '../utils/browser/isMobile';\n\n/** @ignore */\nconst KEY_CODE_TAB = 9;\n\nconst DIV_TOUCH_SIZE = 100;\nconst DIV_TOUCH_POS_X = 0;\nconst DIV_TOUCH_POS_Y = 0;\nconst DIV_TOUCH_ZINDEX = 2;\n\nconst DIV_HOOK_SIZE = 1;\nconst DIV_HOOK_POS_X = -1000;\nconst DIV_HOOK_POS_Y = -1000;\nconst DIV_HOOK_ZINDEX = 2;\n\n/**\n * Initialisation options for the accessibility system when used with an Application.\n * @category accessibility\n * @advanced\n */\nexport interface AccessibilitySystemOptions\n{\n    /** Options for the accessibility system */\n    accessibilityOptions?: AccessibilityOptions;\n}\n\n/**\n * The options for the accessibility system.\n * @category accessibility\n * @advanced\n */\nexport interface AccessibilityOptions\n{\n    /** Whether to enable accessibility features on initialization instead of waiting for tab key */\n    enabledByDefault?: boolean;\n    /** Whether to visually show the accessibility divs for debugging */\n    debug?: boolean;\n    /** Whether to allow tab key press to activate accessibility features */\n    activateOnTab?: boolean;\n    /** Whether to deactivate accessibility when mouse moves */\n    deactivateOnMouseMove?: boolean;\n}\n\n/**\n * The Accessibility system provides screen reader and keyboard navigation support for PixiJS content.\n * It creates an accessible DOM layer over the canvas that can be controlled programmatically or through user interaction.\n *\n * By default, the system activates when users press the tab key. This behavior can be customized through options:\n * ```js\n * const app = new Application({\n *     accessibilityOptions: {\n *     // Enable immediately instead of waiting for tab\n *     enabledByDefault: true,\n *     // Disable tab key activation\n *     activateOnTab: false,\n *     // Show/hide accessibility divs\n *     debug: false,\n *     // Prevent accessibility from being deactivated when mouse moves\n *     deactivateOnMouseMove: false,\n * }\n * });\n * ```\n *\n * The system can also be controlled programmatically by accessing the `renderer.accessibility` property:\n * ```js\n * app.renderer.accessibility.setAccessibilityEnabled(true);\n * ```\n *\n * To make individual containers accessible:\n * ```js\n * container.accessible = true;\n * ```\n * There are several properties that can be set on a Container to control its accessibility which can\n * be found here: {@link AccessibleOptions}.\n * @category accessibility\n * @standard\n */\nexport class AccessibilitySystem implements System<AccessibilitySystemOptions>\n{\n    /** @ignore */\n    public static extension = {\n        type: [\n            ExtensionType.WebGLSystem,\n            ExtensionType.WebGPUSystem,\n        ],\n        name: 'accessibility',\n    } as const;\n\n    /**\n     * The default options used by the system.\n     * You can set these before initializing the {@link Application} to change the default behavior.\n     * @example\n     * ```js\n     * import { AccessibilitySystem } from 'pixi.js';\n     *\n     * AccessibilitySystem.defaultOptions.enabledByDefault = true;\n     *\n     * const app = new Application()\n     * app.init()\n     * ```\n     */\n    public static defaultOptions: AccessibilityOptions = {\n        /**\n         * Whether to enable accessibility features on initialization\n         * @default false\n         */\n        enabledByDefault: false,\n        /**\n         * Whether to visually show the accessibility divs for debugging\n         * @default false\n         */\n        debug: false,\n        /**\n         * Whether to activate accessibility when tab key is pressed\n         * @default true\n         */\n        activateOnTab: true,\n        /**\n         * Whether to deactivate accessibility when mouse moves\n         * @default true\n         */\n        deactivateOnMouseMove: true,\n    };\n\n    /** Whether accessibility divs are visible for debugging */\n    public debug = false;\n\n    /** Whether to activate on tab key press */\n    private _activateOnTab = true;\n\n    /** Whether to deactivate accessibility when mouse moves */\n    private _deactivateOnMouseMove = true;\n\n    /**\n     * The renderer this accessibility manager works for.\n     * @type {WebGLRenderer|WebGPURenderer}\n     */\n    private _renderer: Renderer;\n\n    /** Internal variable, see isActive getter. */\n    private _isActive = false;\n\n    /** Internal variable, see isMobileAccessibility getter. */\n    private _isMobileAccessibility = false;\n\n    /** Button element for handling touch hooks. */\n    private _hookDiv: HTMLElement | null;\n\n    /** This is the dom element that will sit over the PixiJS element. This is where the div overlays will go. */\n    private _div: HTMLElement | null = null;\n\n    /** A simple pool for storing divs. */\n    private _pools: Record<string, AccessibleHTMLElement[]> = {};\n\n    /** This is a tick used to check if an object is no longer being rendered. */\n    private _renderId = 0;\n\n    /** The array of currently active accessible items. */\n    private _children: Container[] = [];\n\n    /** Count to throttle div updates on android devices. */\n    private _androidUpdateCount = 0;\n\n    /**  The frequency to update the div elements. */\n    private readonly _androidUpdateFrequency = 500; // 2fps\n    private _canvasObserver: CanvasObserver;\n\n    // eslint-disable-next-line @typescript-eslint/prefer-readonly\n    private _isRunningTests: boolean = false;\n\n    /** Bound function references for proper event listener removal */\n    private _boundOnKeyDown: (e: KeyboardEvent) => void = this._onKeyDown.bind(this);\n    private _boundOnMouseMove: (e: MouseEvent) => void = this._onMouseMove.bind(this);\n\n    // eslint-disable-next-line jsdoc/require-param\n    /**\n     * @param {WebGLRenderer|WebGPURenderer} renderer - A reference to the current renderer\n     */\n    constructor(renderer: Renderer, private readonly _mobileInfo: isMobileResult = isMobile)\n    {\n        this._hookDiv = null;\n\n        if (_mobileInfo.tablet || _mobileInfo.phone)\n        {\n            this._createTouchHook();\n        }\n\n        this._renderer = renderer;\n    }\n\n    /**\n     * Value of `true` if accessibility is currently active and accessibility layers are showing.\n     * @type {boolean}\n     * @readonly\n     */\n    get isActive(): boolean\n    {\n        return this._isActive;\n    }\n\n    /**\n     * Value of `true` if accessibility is enabled for touch devices.\n     * @type {boolean}\n     * @readonly\n     */\n    get isMobileAccessibility(): boolean\n    {\n        return this._isMobileAccessibility;\n    }\n\n    /**\n     * Button element for handling touch hooks.\n     * @readonly\n     */\n    get hookDiv()\n    {\n        return this._hookDiv;\n    }\n\n    /**\n     * The DOM element that will sit over the PixiJS element. This is where the div overlays will go.\n     * @readonly\n     */\n    get div()\n    {\n        return this._div;\n    }\n\n    /**\n     * Creates the touch hooks.\n     * @private\n     */\n    private _createTouchHook(): void\n    {\n        const hookDiv = document.createElement('button');\n\n        hookDiv.style.width = `${DIV_HOOK_SIZE}px`;\n        hookDiv.style.height = `${DIV_HOOK_SIZE}px`;\n        hookDiv.style.position = 'absolute';\n        hookDiv.style.top = `${DIV_HOOK_POS_X}px`;\n        hookDiv.style.left = `${DIV_HOOK_POS_Y}px`;\n        hookDiv.style.zIndex = DIV_HOOK_ZINDEX.toString();\n        hookDiv.style.backgroundColor = '#FF0000';\n        hookDiv.title = 'select to enable accessibility for this content';\n\n        hookDiv.addEventListener('focus', () =>\n        {\n            this._isMobileAccessibility = true;\n            this._activate();\n            this._destroyTouchHook();\n        });\n\n        document.body.appendChild(hookDiv);\n        this._hookDiv = hookDiv;\n    }\n\n    /**\n     * Destroys the touch hooks.\n     * @private\n     */\n    private _destroyTouchHook(): void\n    {\n        if (!this._hookDiv)\n        {\n            return;\n        }\n        document.body.removeChild(this._hookDiv);\n        this._hookDiv = null;\n    }\n\n    /**\n     * Activating will cause the Accessibility layer to be shown.\n     * This is called when a user presses the tab key.\n     * @private\n     */\n    private _activate(): void\n    {\n        if (this._isActive)\n        {\n            return;\n        }\n\n        this._isActive = true;\n\n        // Create and add div if needed\n        if (!this._div)\n        {\n            this._div = document.createElement('div');\n            this._div.style.position = 'absolute';\n            this._div.style.top = `${DIV_TOUCH_POS_X}px`;\n            this._div.style.left = `${DIV_TOUCH_POS_Y}px`;\n            this._div.style.pointerEvents = 'none';\n            this._div.style.zIndex = DIV_TOUCH_ZINDEX.toString();\n\n            // Initialize the CanvasTransformSync to keep the DOM element in sync with the canvas\n            this._canvasObserver = new CanvasObserver({\n                domElement: this._div,\n                renderer: this._renderer,\n            });\n        }\n\n        // Add listeners using the stored bound references\n        if (this._activateOnTab)\n        {\n            globalThis.addEventListener('keydown', this._boundOnKeyDown, false);\n        }\n\n        if (this._deactivateOnMouseMove)\n        {\n            globalThis.document.addEventListener('mousemove', this._boundOnMouseMove, true);\n        }\n\n        // Check if canvas is in DOM\n        const canvas = this._renderer.view.canvas;\n\n        if (!canvas.parentNode)\n        {\n            const observer = new MutationObserver(() =>\n            {\n                if (canvas.parentNode)\n                {\n                    observer.disconnect();\n\n                    // Add to DOM\n                    this._canvasObserver.ensureAttached();\n                    // Only start the postrender runner after div is ready\n                    this._initAccessibilitySetup();\n                }\n            });\n\n            observer.observe(document.body, { childList: true, subtree: true });\n        }\n        else\n        {\n            // Add to DOM\n            this._canvasObserver.ensureAttached();\n            // Div is ready, initialize accessibility\n            this._initAccessibilitySetup();\n        }\n    }\n\n    // New method to handle initialization after div is ready\n    private _initAccessibilitySetup(): void\n    {\n        // Add the postrender runner to start processing accessible objects\n        this._renderer.runners.postrender.add(this);\n\n        // Force an initial update of accessible objects\n        if (this._renderer.lastObjectRendered)\n        {\n            this._updateAccessibleObjects(this._renderer.lastObjectRendered as Container);\n        }\n    }\n\n    /**\n     * Deactivates the accessibility system. Removes listeners and accessibility elements.\n     * @private\n     */\n    private _deactivate(): void\n    {\n        if (!this._isActive || this._isMobileAccessibility)\n        {\n            return;\n        }\n\n        this._isActive = false;\n\n        // Switch listeners\n        globalThis.document.removeEventListener('mousemove', this._boundOnMouseMove, true);\n        if (this._activateOnTab)\n        {\n            globalThis.addEventListener('keydown', this._boundOnKeyDown, false);\n        }\n\n        this._renderer.runners.postrender.remove(this);\n\n        // Remove all active accessibility elements\n        for (const child of this._children)\n        {\n            if (child._accessibleDiv?.parentNode)\n            {\n                child._accessibleDiv.parentNode.removeChild(child._accessibleDiv);\n                child._accessibleDiv = null;\n            }\n            child._accessibleActive = false;\n        }\n\n        // Clear the pool of divs\n        for (const accessibleType in this._pools)\n        {\n            const pool = this._pools[accessibleType];\n\n            pool.forEach((div) =>\n            {\n                if (div.parentNode)\n                {\n                    div.parentNode.removeChild(div);\n                }\n            });\n            delete this._pools[accessibleType];\n        }\n\n        // Remove parent div from DOM\n        if (this._div?.parentNode)\n        {\n            this._div.parentNode.removeChild(this._div);\n        }\n\n        this._pools = {};\n        this._children = [];\n    }\n\n    /**\n     * This recursive function will run through the scene graph and add any new accessible objects to the DOM layer.\n     * @private\n     * @param {Container} container - The Container to check.\n     */\n    private _updateAccessibleObjects(container: Container): void\n    {\n        if (!container.visible || !container.accessibleChildren)\n        {\n            return;\n        }\n\n        // Separate check for accessibility without requiring interactivity\n        if (container.accessible)\n        {\n            if (!container._accessibleActive)\n            {\n                this._addChild(container);\n            }\n\n            container._renderId = this._renderId;\n        }\n\n        const children = container.children;\n\n        if (children)\n        {\n            for (let i = 0; i < children.length; i++)\n            {\n                this._updateAccessibleObjects(children[i] as Container);\n            }\n        }\n    }\n\n    /**\n     * Runner init called, view is available at this point.\n     * @ignore\n     */\n    public init(options?: AccessibilitySystemOptions): void\n    {\n        // Ensure we have the accessibilityOptions object\n        const defaultOpts = AccessibilitySystem.defaultOptions;\n        const mergedOptions = {\n            accessibilityOptions: {\n                ...defaultOpts,\n                ...(options?.accessibilityOptions || {})\n            }\n        };\n\n        this.debug = mergedOptions.accessibilityOptions.debug;\n        this._activateOnTab = mergedOptions.accessibilityOptions.activateOnTab;\n        this._deactivateOnMouseMove = mergedOptions.accessibilityOptions.deactivateOnMouseMove;\n\n        if (mergedOptions.accessibilityOptions.enabledByDefault)\n        {\n            this._activate();\n        }\n\n        this._renderer.runners.postrender.remove(this);\n    }\n\n    /**\n     * Updates the accessibility layer during rendering.\n     * - Removes divs for containers no longer in the scene\n     * - Updates the position and dimensions of the root div\n     * - Updates positions of active accessibility divs\n     * Only fires while the accessibility system is active.\n     * @ignore\n     */\n    public postrender(): void\n    {\n        /* On Android default web browser, tab order seems to be calculated by position rather than tabIndex,\n        *  moving buttons can cause focus to flicker between two buttons making it hard/impossible to navigate,\n        *  so I am just running update every half a second, seems to fix it.\n        */\n        const now = performance.now();\n\n        if (this._mobileInfo.android.device && now < this._androidUpdateCount)\n        {\n            return;\n        }\n\n        this._androidUpdateCount = now + this._androidUpdateFrequency;\n\n        if ((!this._renderer.renderingToScreen || !this._renderer.view.canvas)\n            && !this._isRunningTests)\n        {\n            return;\n        }\n\n        // Track which containers are still active this frame\n        const activeIds = new Set<number>();\n\n        if (this._renderer.lastObjectRendered)\n        {\n            this._updateAccessibleObjects(this._renderer.lastObjectRendered as Container);\n\n            // Mark all updated containers as active\n            for (const child of this._children)\n            {\n                if (child._renderId === this._renderId)\n                {\n                    activeIds.add(this._children.indexOf(child));\n                }\n            }\n        }\n\n        // Remove any containers that weren't updated this frame\n        for (let i = this._children.length - 1; i >= 0; i--)\n        {\n            const child = this._children[i];\n\n            if (!activeIds.has(i))\n            {\n                // Container was removed, clean up its accessibility div\n                if (child._accessibleDiv && child._accessibleDiv.parentNode)\n                {\n                    child._accessibleDiv.parentNode.removeChild(child._accessibleDiv);\n\n                    const pool = this._getPool(child.accessibleType);\n\n                    pool.push(child._accessibleDiv);\n                    child._accessibleDiv = null;\n                }\n                child._accessibleActive = false;\n                removeItems(this._children, i, 1);\n            }\n        }\n\n        // Update root div dimensions if needed\n        if (this._renderer.renderingToScreen)\n        {\n            // Ensure the main DOM element is attached to the same parent as the canvas\n            this._canvasObserver.ensureAttached();\n        }\n\n        // Update positions of existing divs\n        for (let i = 0; i < this._children.length; i++)\n        {\n            const child = this._children[i];\n\n            if (!child._accessibleActive || !child._accessibleDiv)\n            {\n                continue;\n            }\n\n            // Only update position-related properties\n            const div = child._accessibleDiv;\n            const hitArea = (child.hitArea || child.getBounds().rectangle) as Rectangle;\n\n            if (child.hitArea)\n            {\n                const wt = child.worldTransform;\n\n                div.style.left = `${(wt.tx + (hitArea.x * wt.a))}px`;\n                div.style.top = `${(wt.ty + (hitArea.y * wt.d))}px`;\n                div.style.width = `${hitArea.width * wt.a}px`;\n                div.style.height = `${hitArea.height * wt.d}px`;\n            }\n            else\n            {\n                this._capHitArea(hitArea);\n                div.style.left = `${hitArea.x}px`;\n                div.style.top = `${hitArea.y}px`;\n                div.style.width = `${hitArea.width}px`;\n                div.style.height = `${hitArea.height}px`;\n            }\n        }\n\n        // increment the render id..\n        this._renderId++;\n    }\n\n    /**\n     * private function that will visually add the information to the\n     * accessibility div\n     * @param {HTMLElement} div -\n     */\n    private _updateDebugHTML(div: AccessibleHTMLElement): void\n    {\n        div.innerHTML = `type: ${div.type}</br> title : ${div.title}</br> tabIndex: ${div.tabIndex}`;\n    }\n\n    /**\n     * Adjust the hit area based on the bounds of a display object\n     * @param {Rectangle} hitArea - Bounds of the child\n     */\n    private _capHitArea(hitArea: Rectangle): void\n    {\n        if (hitArea.x < 0)\n        {\n            hitArea.width += hitArea.x;\n            hitArea.x = 0;\n        }\n\n        if (hitArea.y < 0)\n        {\n            hitArea.height += hitArea.y;\n            hitArea.y = 0;\n        }\n\n        const { width: viewWidth, height: viewHeight } = this._renderer;\n\n        if (hitArea.x + hitArea.width > viewWidth)\n        {\n            hitArea.width = viewWidth - hitArea.x;\n        }\n\n        if (hitArea.y + hitArea.height > viewHeight)\n        {\n            hitArea.height = viewHeight - hitArea.y;\n        }\n    }\n\n    /**\n     * Creates or reuses a div element for a Container and adds it to the accessibility layer.\n     * Sets up ARIA attributes, event listeners, and positioning based on the container's properties.\n     * @private\n     * @param {Container} container - The child to make accessible.\n     */\n    private _addChild<T extends Container>(container: T): void\n    {\n        const pool = this._getPool(container.accessibleType);\n\n        let div = pool.pop();\n\n        if (div)\n        {\n            /*\n             * Reset these properties so we don't have outdated metadata.\n             * It was possible to end up with:\n             * - the old tabIndex if container.interactive is false\n             * - the old aria-label if container.accessibleHint is not set\n             */\n            div.innerHTML = '';\n            div.removeAttribute('title');\n            div.removeAttribute('aria-label');\n            div.tabIndex = 0;\n        }\n        else\n        {\n            if (container.accessibleType === 'button')\n            {\n                div = document.createElement('button');\n            }\n            else\n            {\n                div = document.createElement(container.accessibleType);\n                div.style.cssText = `\n                        color: transparent;\n                        pointer-events: none;\n                        padding: 0;\n                        margin: 0;\n                        border: 0;\n                        outline: 0;\n                        background: transparent;\n                        box-sizing: border-box;\n                        user-select: none;\n                        -webkit-user-select: none;\n                        -moz-user-select: none;\n                        -ms-user-select: none;\n                    `;\n                if (container.accessibleText)\n                {\n                    div.innerText = container.accessibleText;\n                }\n            }\n            div.style.width = `${DIV_TOUCH_SIZE}px`;\n            div.style.height = `${DIV_TOUCH_SIZE}px`;\n            div.style.backgroundColor = this.debug ? 'rgba(255,255,255,0.5)' : 'transparent';\n            div.style.position = 'absolute';\n            div.style.zIndex = DIV_TOUCH_ZINDEX.toString();\n            div.style.borderStyle = 'none';\n\n            // ARIA attributes ensure that button title and hint updates are announced properly\n            if (navigator.userAgent.toLowerCase().includes('chrome'))\n            {\n                // Chrome doesn't need aria-live to work as intended; in fact it just gets more confused.\n                div.setAttribute('aria-live', 'off');\n            }\n            else\n            {\n                div.setAttribute('aria-live', 'polite');\n            }\n\n            if (navigator.userAgent.match(/rv:.*Gecko\\//))\n            {\n                // FireFox needs this to announce only the new button name\n                div.setAttribute('aria-relevant', 'additions');\n            }\n            else\n            {\n                // required by IE, other browsers don't much care\n                div.setAttribute('aria-relevant', 'text');\n            }\n\n            div.addEventListener('click', this._onClick.bind(this));\n            div.addEventListener('focus', this._onFocus.bind(this));\n            div.addEventListener('focusout', this._onFocusOut.bind(this));\n        }\n\n        // set pointer events\n        div.style.pointerEvents = container.accessiblePointerEvents;\n        // set the type, this defaults to button!\n        div.type = container.accessibleType;\n\n        if (container.accessibleTitle && container.accessibleTitle !== null)\n        {\n            div.title = container.accessibleTitle;\n        }\n        else if (!container.accessibleHint\n            || container.accessibleHint === null)\n        {\n            div.title = `container ${container.tabIndex}`;\n        }\n\n        if (container.accessibleHint\n            && container.accessibleHint !== null)\n        {\n            div.setAttribute('aria-label', container.accessibleHint);\n        }\n\n        if (container.interactive)\n        {\n            div.tabIndex = container.tabIndex;\n        }\n        else\n        {\n            // reset tabIndex back to 0 in case this div instance was pulled from the pool and already had a value\n            div.tabIndex = 0;\n        }\n\n        if (this.debug)\n        {\n            this._updateDebugHTML(div);\n        }\n\n        container._accessibleActive = true;\n        container._accessibleDiv = div;\n        div.container = container;\n\n        this._children.push(container);\n        this._div.appendChild(container._accessibleDiv);\n    }\n\n    /**\n     * Dispatch events with the EventSystem.\n     * @param e\n     * @param type\n     * @private\n     */\n    private _dispatchEvent(e: UIEvent, type: string[]): void\n    {\n        const { container: target } = e.target as AccessibleHTMLElement;\n        const boundary = this._renderer.events.rootBoundary;\n        const event: FederatedEvent = Object.assign(new FederatedEvent(boundary), { target });\n\n        boundary.rootTarget = this._renderer.lastObjectRendered as Container;\n        type.forEach((type) => boundary.dispatchEvent(event, type));\n    }\n\n    /**\n     * Maps the div button press to pixi's EventSystem (click)\n     * @private\n     * @param {MouseEvent} e - The click event.\n     */\n    private _onClick(e: MouseEvent): void\n    {\n        this._dispatchEvent(e, ['click', 'pointertap', 'tap']);\n    }\n\n    /**\n     * Maps the div focus events to pixi's EventSystem (mouseover)\n     * @private\n     * @param {FocusEvent} e - The focus event.\n     */\n    private _onFocus(e: FocusEvent): void\n    {\n        if (!(e.target as Element).getAttribute('aria-live'))\n        {\n            (e.target as Element).setAttribute('aria-live', 'assertive');\n        }\n\n        this._dispatchEvent(e, ['mouseover']);\n    }\n\n    /**\n     * Maps the div focus events to pixi's EventSystem (mouseout)\n     * @private\n     * @param {FocusEvent} e - The focusout event.\n     */\n    private _onFocusOut(e: FocusEvent): void\n    {\n        if (!(e.target as Element).getAttribute('aria-live'))\n        {\n            (e.target as Element).setAttribute('aria-live', 'polite');\n        }\n\n        this._dispatchEvent(e, ['mouseout']);\n    }\n\n    /**\n     * Is called when a key is pressed\n     * @private\n     * @param {KeyboardEvent} e - The keydown event.\n     */\n    private _onKeyDown(e: KeyboardEvent): void\n    {\n        if (e.keyCode !== KEY_CODE_TAB || !this._activateOnTab)\n        {\n            return;\n        }\n\n        this._activate();\n    }\n\n    /**\n     * Is called when the mouse moves across the renderer element\n     * @private\n     * @param {MouseEvent} e - The mouse event.\n     */\n    private _onMouseMove(e: MouseEvent): void\n    {\n        if (e.movementX === 0 && e.movementY === 0)\n        {\n            return;\n        }\n\n        this._deactivate();\n    }\n\n    /**\n     * Destroys the accessibility system. Removes all elements and listeners.\n     * > [!IMPORTANT] This is typically called automatically when the {@link Application} is destroyed.\n     * > A typically user should not need to call this method directly.\n     */\n    public destroy(): void\n    {\n        this._deactivate();\n        this._destroyTouchHook();\n\n        this._canvasObserver?.destroy();\n        this._canvasObserver = null;\n\n        this._div = null;\n        this._pools = null;\n        this._children = null;\n        this._renderer = null;\n        this._hookDiv = null;\n\n        // Remove listeners using the stored bound references\n        globalThis.removeEventListener('keydown', this._boundOnKeyDown);\n        this._boundOnKeyDown = null;\n        globalThis.document.removeEventListener('mousemove', this._boundOnMouseMove, true);\n        this._boundOnMouseMove = null;\n    }\n\n    /**\n     * Enables or disables the accessibility system.\n     * @param enabled - Whether to enable or disable accessibility.\n     * @example\n     * ```js\n     * app.renderer.accessibility.setAccessibilityEnabled(true); // Enable accessibility\n     * app.renderer.accessibility.setAccessibilityEnabled(false); // Disable accessibility\n     * ```\n     */\n    public setAccessibilityEnabled(enabled: boolean): void\n    {\n        if (enabled)\n        {\n            this._activate();\n        }\n        else\n        {\n            this._deactivate();\n        }\n    }\n\n    private _getPool(accessibleType: string): AccessibleHTMLElement[]\n    {\n        if (!this._pools[accessibleType])\n        {\n            this._pools[accessibleType] = [];\n        }\n\n        return this._pools[accessibleType];\n    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