@ordojs/accessibility/dist/focus/index.mjs.map

Comprehensive accessibility system for OrdoJS with ARIA generation, automated testing, and screen reader support

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* @fileoverview OrdoJS Accessibility - Focus Management Module\n *\n * Focus management, skip links, and keyboard navigation.\n */\n\nimport { EventEmitter } from 'events';\nimport type {\n  FocusConfig,\n  FocusInfo,\n  KeyboardNavigation\n} from '../types/index.js';\n\n/**\n * Focus manager for handling focus management and keyboard navigation\n */\nexport class FocusManager extends EventEmitter {\n  private config: FocusConfig;\n  private focusableElements: Map<string, FocusInfo>;\n  private focusTraps: Map<string, string[]>;\n  private skipLinks: Map<string, string>;\n  private isInitialized: boolean;\n\n  /**\n   * Create a new FocusManager instance\n   *\n   * @param config - Focus configuration\n   */\n  constructor(config: FocusConfig) {\n    super();\n\n    this.config = config;\n    this.focusableElements = new Map();\n    this.focusTraps = new Map();\n    this.skipLinks = new Map();\n    this.isInitialized = false;\n  }\n\n  /**\n   * Initialize the focus manager\n   */\n  async initialize(): Promise<void> {\n    if (this.isInitialized) {\n      console.warn('Focus manager is already initialized');\n      return;\n    }\n\n    try {\n      // Initialize focus management\n      await this.initializeFocusManagement();\n\n      this.isInitialized = true;\n      console.log('Focus manager initialized successfully');\n\n      this.emit('initialized');\n    } catch (error) {\n      console.error('Failed to initialize focus manager:', error);\n      this.emit('error', error);\n      throw error;\n    }\n  }\n\n  /**\n   * Register focusable element\n   *\n   * @param element - Element selector\n   * @param info - Focus information\n   */\n  registerFocusableElement(element: string, info: Partial<FocusInfo> = {}): void {\n    const focusInfo: FocusInfo = {\n      element,\n      tabIndex: info.tabIndex || 0,\n      focusOrder: info.focusOrder || 0,\n      focusable: info.focusable !== false,\n      focused: false,\n      focusTrap: info.focusTrap || false,\n      skipLink: info.skipLink || false,\n      ariaState: info.ariaState || {},\n      ariaProperty: info.ariaProperty || {}\n    };\n\n    // Only set optional properties if they have values\n    if (info.ariaLabel) {\n      focusInfo.ariaLabel = info.ariaLabel;\n    }\n    if (info.ariaDescription) {\n      focusInfo.ariaDescription = info.ariaDescription;\n    }\n    if (info.ariaRole) {\n      focusInfo.ariaRole = info.ariaRole;\n    }\n\n    this.focusableElements.set(element, focusInfo);\n    this.emit('elementRegistered', focusInfo);\n  }\n\n  /**\n   * Create focus trap\n   *\n   * @param trapId - Focus trap ID\n   * @param elements - Elements in the trap\n   * @param options - Trap options\n   */\n  createFocusTrap(\n    trapId: string,\n    elements: string[],\n    options: {\n      restoreFocus?: boolean;\n      initialFocus?: string;\n      returnFocus?: boolean;\n    } = {}\n  ): void {\n    this.focusTraps.set(trapId, elements);\n\n    // Set focus order for trapped elements\n    elements.forEach((element, index) => {\n      const focusInfo = this.focusableElements.get(element);\n      if (focusInfo) {\n        focusInfo.focusOrder = index;\n        focusInfo.focusTrap = true;\n        this.focusableElements.set(element, focusInfo);\n      }\n    });\n\n    // Set initial focus\n    if (options.initialFocus) {\n      this.setFocus(options.initialFocus);\n    }\n\n    this.emit('focusTrapCreated', { trapId, elements, options });\n  }\n\n  /**\n   * Remove focus trap\n   *\n   * @param trapId - Focus trap ID\n   * @param options - Removal options\n   */\n  removeFocusTrap(\n    trapId: string,\n    options: {\n      restoreFocus?: boolean;\n      returnFocus?: boolean;\n    } = {}\n  ): void {\n    const elements = this.focusTraps.get(trapId);\n    if (elements) {\n      // Remove focus trap from elements\n      elements.forEach(element => {\n        const focusInfo = this.focusableElements.get(element);\n        if (focusInfo) {\n          focusInfo.focusTrap = false;\n          this.focusableElements.set(element, focusInfo);\n        }\n      });\n\n      this.focusTraps.delete(trapId);\n      this.emit('focusTrapRemoved', { trapId, options });\n    }\n  }\n\n  /**\n   * Set focus to element\n   *\n   * @param element - Element selector\n   */\n  setFocus(element: string): void {\n    const focusInfo = this.focusableElements.get(element);\n    if (focusInfo && focusInfo.focusable) {\n      // Clear previous focus\n      for (const info of this.focusableElements.values()) {\n        info.focused = false;\n      }\n\n      // Set new focus\n      focusInfo.focused = true;\n      this.focusableElements.set(element, focusInfo);\n\n      this.emit('focusChanged', focusInfo);\n    }\n  }\n\n  /**\n   * Move focus to next element\n   *\n   * @param currentElement - Current element\n   * @returns Next focused element or undefined\n   */\n  moveToNextElement(currentElement: string): FocusInfo | undefined {\n    const current = this.focusableElements.get(currentElement);\n    if (!current) return undefined;\n\n    const focusableElements = Array.from(this.focusableElements.values())\n      .filter(info => info.focusable)\n      .sort((a, b) => a.focusOrder - b.focusOrder);\n\n    const currentIndex = focusableElements.findIndex(info => info.element === currentElement);\n    if (currentIndex === -1) return undefined;\n\n    const nextIndex = (currentIndex + 1) % focusableElements.length;\n    const nextElement = focusableElements[nextIndex];\n\n    if (nextElement) {\n      this.setFocus(nextElement.element);\n      return nextElement;\n    }\n    return undefined;\n  }\n\n  /**\n   * Move focus to previous element\n   *\n   * @param currentElement - Current element\n   * @returns Previous focused element or undefined\n   */\n  moveToPreviousElement(currentElement: string): FocusInfo | undefined {\n    const current = this.focusableElements.get(currentElement);\n    if (!current) return undefined;\n\n    const focusableElements = Array.from(this.focusableElements.values())\n      .filter(info => info.focusable)\n      .sort((a, b) => a.focusOrder - b.focusOrder);\n\n    const currentIndex = focusableElements.findIndex(info => info.element === currentElement);\n    if (currentIndex === -1) return undefined;\n\n    const prevIndex = currentIndex === 0 ? focusableElements.length - 1 : currentIndex - 1;\n    const prevElement = focusableElements[prevIndex];\n\n    if (prevElement) {\n      this.setFocus(prevElement.element);\n      return prevElement;\n    }\n    return undefined;\n  }\n\n  /**\n   * Add skip link\n   *\n   * @param target - Target element\n   * @param label - Skip link label\n   * @param position - Skip link position\n   */\n  addSkipLink(\n    target: string,\n    label: string,\n    position: 'top' | 'bottom' = 'top'\n  ): void {\n    this.skipLinks.set(target, label);\n    this.emit('skipLinkAdded', { target, label, position });\n  }\n\n  /**\n   * Remove skip link\n   *\n   * @param target - Target element\n   */\n  removeSkipLink(target: string): void {\n    this.skipLinks.delete(target);\n    this.emit('skipLinkRemoved', { target });\n  }\n\n  /**\n   * Handle keyboard navigation\n   *\n   * @param event - Keyboard event\n   * @param currentElement - Current element\n   * @returns Navigation result\n   */\n  handleKeyboardNavigation(\n    event: KeyboardEvent,\n    currentElement: string\n  ): {\n    handled: boolean;\n    action: string;\n    target?: string;\n  } {\n    const navigation: KeyboardNavigation = {\n      id: `nav_${Date.now()}`,\n      type: 'custom',\n      key: event.key,\n      keyCode: event.keyCode,\n      target: currentElement,\n      action: '',\n      description: '',\n      enabled: true,\n      visible: true\n    };\n\n    let handled = false;\n    let action = '';\n\n    switch (event.key) {\n      case 'Tab':\n        if (event.shiftKey) {\n          const prevElement = this.moveToPreviousElement(currentElement);\n          if (prevElement) {\n            action = 'moveToPrevious';\n            handled = true;\n          }\n        } else {\n          const nextElement = this.moveToNextElement(currentElement);\n          if (nextElement) {\n            action = 'moveToNext';\n            handled = true;\n          }\n        }\n        break;\n\n      case 'Escape':\n        // Exit focus trap or close modal\n        action = 'escape';\n        handled = true;\n        break;\n\n      case 'Enter':\n      case ' ':\n        // Activate element\n        action = 'activate';\n        handled = true;\n        break;\n\n      case 'ArrowUp':\n        // Navigate up\n        action = 'navigateUp';\n        handled = true;\n        break;\n\n      case 'ArrowDown':\n        // Navigate down\n        action = 'navigateDown';\n        handled = true;\n        break;\n\n      case 'ArrowLeft':\n        // Navigate left\n        action = 'navigateLeft';\n        handled = true;\n        break;\n\n      case 'ArrowRight':\n        // Navigate right\n        action = 'navigateRight';\n        handled = true;\n        break;\n\n      case 'Home':\n        // Move to first element\n        action = 'moveToFirst';\n        handled = true;\n        break;\n\n      case 'End':\n        // Move to last element\n        action = 'moveToLast';\n        handled = true;\n        break;\n    }\n\n    if (handled) {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n\n    navigation.action = action;\n    this.emit('keyboardNavigation', navigation);\n\n    return {\n      handled,\n      action,\n      target: currentElement\n    };\n  }\n\n  /**\n   * Get focusable elements\n   *\n   * @returns Array of focusable elements\n   */\n  getFocusableElements(): FocusInfo[] {\n    return Array.from(this.focusableElements.values())\n      .filter(info => info.focusable)\n      .sort((a, b) => a.focusOrder - b.focusOrder);\n  }\n\n  /**\n   * Get focus trap elements\n   *\n   * @param trapId - Focus trap ID\n   * @returns Array of trapped elements\n   */\n  getFocusTrapElements(trapId: string): FocusInfo[] {\n    const elements = this.focusTraps.get(trapId);\n    if (!elements) return [];\n\n    return elements\n      .map(element => this.focusableElements.get(element))\n      .filter((info): info is FocusInfo => info !== undefined)\n      .sort((a, b) => a.focusOrder - b.focusOrder);\n  }\n\n  /**\n   * Get skip links\n   *\n   * @returns Array of skip links\n   */\n  getSkipLinks(): Array<{ target: string; label: string }> {\n    return Array.from(this.skipLinks.entries()).map(([target, label]) => ({\n      target,\n      label\n    }));\n  }\n\n  /**\n   * Get currently focused element\n   *\n   * @returns Focused element or undefined\n   */\n  getFocusedElement(): FocusInfo | undefined {\n    return Array.from(this.focusableElements.values()).find(info => info.focused);\n  }\n\n  /**\n   * Get focus manager statistics\n   *\n   * @returns Statistics\n   */\n  getStats(): {\n    totalElements: number;\n    focusableElements: number;\n    focusedElements: number;\n    focusTraps: number;\n    skipLinks: number;\n  } {\n    const totalElements = this.focusableElements.size;\n    const focusableElements = Array.from(this.focusableElements.values())\n      .filter(info => info.focusable).length;\n    const focusedElements = Array.from(this.focusableElements.values())\n      .filter(info => info.focused).length;\n\n    return {\n      totalElements,\n      focusableElements,\n      focusedElements,\n      focusTraps: this.focusTraps.size,\n      skipLinks: this.skipLinks.size\n    };\n  }\n\n  /**\n   * Initialize focus management\n   */\n  private async initializeFocusManagement(): Promise<void> {\n    console.log('Initializing focus management...');\n\n    // Set up focus indicators if enabled\n    if (this.config.focusIndicators) {\n      this.setupFocusIndicators();\n    }\n\n    // Set up skip links if enabled\n    if (this.config.skipLinks) {\n      this.setupSkipLinks();\n    }\n\n    // Set up focus restoration if enabled\n    if (this.config.focusRestoration) {\n      this.setupFocusRestoration();\n    }\n  }\n\n  /**\n   * Setup focus indicators\n   */\n  private setupFocusIndicators(): void {\n    // This is a simplified implementation\n    // In a real implementation, you would add CSS for focus indicators\n    console.log('Setting up focus indicators...');\n  }\n\n  /**\n   * Setup skip links\n   */\n  private setupSkipLinks(): void {\n    // This is a simplified implementation\n    // In a real implementation, you would create skip link elements\n    console.log('Setting up skip links...');\n  }\n\n  /**\n   * Setup focus restoration\n   */\n  private setupFocusRestoration(): void {\n    // This is a simplified implementation\n    // In a real implementation, you would track focus history\n    console.log('Setting up focus restoration...');\n  }\n}\n"]}