0
# Input & Hardware
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Barcode scanning, NFC communication, keyboard management, and hardware interaction capabilities for advanced input processing and device integration.
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## Capabilities
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### Barcode Scanner
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Scan various barcode formats including QR codes, UPC codes, and other standard formats with customizable options.
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```typescript { .api }
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/**
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 * Barcode scanner configuration options
13
 */
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interface BarcodeScannerOptions {
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  /** Prefer front camera for scanning */
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  preferFrontCamera?: boolean;
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  /** Show flip camera button */
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  showFlipCameraButton?: boolean;
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  /** Show torch button */
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  showTorchButton?: boolean;
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  /** Start with torch on */
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  torchOn?: boolean;
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  /** Prompt text displayed to user */
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  prompt?: string;
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  /** Duration to display result in milliseconds */
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  resultDisplayDuration?: number;
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  /** Supported barcode formats (comma-separated) */
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  formats?: string;
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  /** Screen orientation (portrait, landscape) */
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  orientation?: string;
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  /** Disable animations */
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  disableAnimations?: boolean;
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  /** Disable success beep */
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  disableSuccessBeep?: boolean;
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}
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37
/**
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 * Barcode scan result
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 */
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interface BarcodeScanResult {
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  /** Scanned text content */
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  text: string;
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  /** Barcode format (QR_CODE, UPC_A, CODE_128, etc.) */
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  format: string;
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  /** Whether scan was cancelled by user */
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  cancelled: boolean;
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}
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49
/**
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 * BarcodeScanner class for scanning barcodes and QR codes
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 */
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class BarcodeScanner {
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  /**
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   * Scan barcode using device camera
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   * @param options Scanner configuration options
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   * @returns Promise resolving to BarcodeScanResult
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   */
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  static scan(options?: BarcodeScannerOptions): Promise<BarcodeScanResult>;
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  /**
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   * Encode text into barcode
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   * @param type Barcode type (TEXT_TYPE, EMAIL_TYPE, PHONE_TYPE, etc.)
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   * @param data Data to encode
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   * @returns Promise resolving to encoded barcode
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   */
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  static encode(type: string, data: any): Promise<any>;
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}
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```
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**Usage Examples:**
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```typescript
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import { BarcodeScanner, BarcodeScannerOptions, BarcodeScanResult } from 'ionic-native';
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// Basic barcode scanning
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async function scanBarcode(): Promise<BarcodeScanResult | null> {
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  const options: BarcodeScannerOptions = {
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    preferFrontCamera: false,
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    showFlipCameraButton: true,
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    showTorchButton: true,
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    torchOn: false,
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    prompt: "Place a barcode inside the scan area",
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    resultDisplayDuration: 500,
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    formats: "QR_CODE,PDF_417,CODE_128,CODE_39,UPC_A,UPC_E,EAN_13,EAN_8",
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    orientation: "portrait",
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    disableAnimations: true,
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    disableSuccessBeep: false
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  };
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  try {
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    const result = await BarcodeScanner.scan(options);
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    if (result.cancelled) {
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      console.log('Scan cancelled by user');
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      return null;
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    }
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    console.log('Scanned result:', {
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      text: result.text,
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      format: result.format
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    });
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    return result;
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  } catch (error) {
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    console.error('Scan failed:', error);
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    throw error;
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  }
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}
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// QR Code specific scanning
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class QRCodeScanner {
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  async scanQRCode(): Promise<BarcodeScanResult | null> {
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    const options: BarcodeScannerOptions = {
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      preferFrontCamera: false,
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      showFlipCameraButton: false,
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      showTorchButton: true,
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      prompt: "Scan QR Code",
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      formats: "QR_CODE",
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      orientation: "portrait"
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    };
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    try {
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      const result = await BarcodeScanner.scan(options);
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      if (!result.cancelled) {
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        return this.parseQRCodeContent(result);
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      }
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      return null;
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    } catch (error) {
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      console.error('QR Code scan failed:', error);
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      throw error;
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    }
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  }
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  private parseQRCodeContent(result: BarcodeScanResult): BarcodeScanResult {
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    const text = result.text;
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    // Parse different QR code types
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    if (text.startsWith('http://') || text.startsWith('https://')) {
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      console.log('URL detected:', text);
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    } else if (text.startsWith('wifi:')) {
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      console.log('WiFi credentials detected');
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      this.parseWiFiQR(text);
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    } else if (text.startsWith('mailto:')) {
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      console.log('Email detected:', text);
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    } else if (text.startsWith('tel:')) {
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      console.log('Phone number detected:', text);
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    } else if (text.startsWith('geo:')) {
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      console.log('Location detected:', text);
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    } else {
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      console.log('Plain text:', text);
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    }
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    return result;
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  }
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  private parseWiFiQR(qrText: string): { ssid: string; password: string; security: string } | null {
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    // Parse WiFi QR format: WIFI:T:WPA;S:MyNetwork;P:MyPassword;;
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    const wifiMatch = qrText.match(/WIFI:T:([^;]*);S:([^;]*);P:([^;]*);/);
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    if (wifiMatch) {
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      return {
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        security: wifiMatch[1],
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        ssid: wifiMatch[2],
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        password: wifiMatch[3]
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      };
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    }
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    return null;
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  }
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  async generateQRCode(data: string, type: string = 'TEXT_TYPE'): Promise<any> {
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    try {
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      const result = await BarcodeScanner.encode(type, data);
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      console.log('QR Code generated:', result);
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      return result;
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    } catch (error) {
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      console.error('QR Code generation failed:', error);
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      throw error;
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    }
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  }
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}
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// Inventory scanning system
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class InventoryScanner {
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  private scannedItems: Map<string, any> = new Map();
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  async scanInventoryItem(): Promise<void> {
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    const options: BarcodeScannerOptions = {
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      prompt: "Scan product barcode",
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      formats: "UPC_A,UPC_E,EAN_13,EAN_8,CODE_128,CODE_39",
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      showTorchButton: true,
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      disableSuccessBeep: false
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    };
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    try {
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      const result = await BarcodeScanner.scan(options);
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      if (!result.cancelled) {
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        await this.processInventoryItem(result);
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      }
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    } catch (error) {
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      console.error('Inventory scan failed:', error);
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    }
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  }
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  private async processInventoryItem(scanResult: BarcodeScanResult): Promise<void> {
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    const barcode = scanResult.text;
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    // Check if item already scanned
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    if (this.scannedItems.has(barcode)) {
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      const item = this.scannedItems.get(barcode);
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      item.quantity += 1;
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      console.log(`Updated quantity for ${item.name}: ${item.quantity}`);
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    } else {
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      // Look up product information
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      const productInfo = await this.lookupProduct(barcode);
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      if (productInfo) {
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        this.scannedItems.set(barcode, {
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          ...productInfo,
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          barcode,
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          quantity: 1,
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          scannedAt: new Date()
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        });
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        console.log('New item added:', productInfo.name);
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      } else {
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        console.warn('Product not found for barcode:', barcode);
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        // Add unknown item
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        this.scannedItems.set(barcode, {
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          barcode,
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          name: 'Unknown Product',
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          quantity: 1,
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          scannedAt: new Date()
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        });
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      }
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    }
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  }
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  private async lookupProduct(barcode: string): Promise<any> {
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    try {
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      // Mock API call to product database
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      const response = await fetch(`https://api.example.com/products/${barcode}`);
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      if (response.ok) {
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        return await response.json();
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      }
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      return null;
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    } catch (error) {
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      console.error('Product lookup failed:', error);
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      return null;
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    }
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  }
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  getScannedItems(): any[] {
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    return Array.from(this.scannedItems.values());
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  }
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  clearScannedItems(): void {
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    this.scannedItems.clear();
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  }
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  exportScanResults(): string {
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    const items = this.getScannedItems();
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    return JSON.stringify(items, null, 2);
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  }
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}
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```
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### NFC (Near Field Communication)
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Interact with NFC tags and devices for data exchange, payments, and device pairing.
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```typescript { .api }
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/**
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 * NDEF event data
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 */
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interface NdefEvent {
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  /** NFC tag information */
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  tag: {
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    /** Tag ID */
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    id: number[];
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    /** Technologies supported by tag */
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    techTypes: string[];
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    /** Tag type */
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    type: string;
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    /** Maximum NDEF message size */
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    maxSize: number;
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    /** Whether tag is writable */
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    isWritable: boolean;
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    /** Whether tag can be made read-only */
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    canMakeReadOnly: boolean;
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  };
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  /** NDEF message */
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  message: NdefRecord[];
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}
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/**
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 * NDEF record structure
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 */
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interface NdefRecord {
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  /** Record ID */
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  id: number[];
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  /** TNF (Type Name Format) */
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  tnf: number;
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  /** Record type */
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  type: number[];
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  /** Record payload */
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  payload: number[];
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}
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/**
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 * Tag discovery event
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 */
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interface TagEvent {
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  /** Tag information */
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  tag: {
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    id: number[];
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    techTypes: string[];
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  };
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}
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/**
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 * NFC class for Near Field Communication
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 */
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class NFC {
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  /**
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   * Add NDEF listener for NDEF-formatted tags
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   * @returns Observable emitting NDEF events
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   */
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  static addNdefListener(): Observable<NdefEvent>;
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  /**
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   * Add listener for any NFC tag discovery
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   * @returns Observable emitting tag discovery events
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   */
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  static addTagDiscoveredListener(): Observable<TagEvent>;
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  /**
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   * Add listener for specific MIME type NDEF records
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   * @param mimeType MIME type to listen for
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   * @returns Observable emitting matching NDEF events
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   */
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  static addMimeTypeListener(mimeType: string): Observable<NdefEvent>;
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350
  /**
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   * Add listener for NDEF formatable tags
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   * @returns Observable emitting formatable tag events
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   */
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  static addNdefFormatableListener(): Observable<TagEvent>;
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  /**
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   * Write NDEF message to tag
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   * @param message Array of NDEF records
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   * @returns Promise indicating write completion
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   */
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  static write(message: any[]): Promise<any>;
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  /**
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   * Make tag read-only
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   * @returns Promise indicating completion
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   */
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  static makeReadOnly(): Promise<any>;
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  /**
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   * Share NDEF message via Android Beam
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   * @param message Array of NDEF records
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   * @returns Promise indicating share setup completion
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   */
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  static share(message: any[]): Promise<any>;
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376
  /**
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   * Stop sharing via Android Beam
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   * @returns Promise indicating stop completion
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   */
380
  static unshare(): Promise<any>;
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382
  /**
383
   * Erase NDEF tag
384
   * @returns Promise indicating erase completion
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   */
386
  static erase(): Promise<any>;
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388
  /**
389
   * Handover to other device via NFC
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   * @param uris Array of URIs to handover
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   * @returns Promise indicating handover completion
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   */
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  static handover(uris: string[]): Promise<any>;
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395
  /**
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   * Stop handover
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   * @returns Promise indicating stop completion
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   */
399
  static stopHandover(): Promise<any>;
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  /**
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   * Show NFC settings
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   * @returns Promise indicating settings display
404
   */
405
  static showSettings(): Promise<any>;
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407
  /**
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   * Check if NFC is enabled
409
   * @returns Promise resolving to NFC status
410
   */
411
  static enabled(): Promise<any>;
412
}
413
```
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**Usage Examples:**
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417
```typescript
418
import { NFC, NdefEvent, TagEvent } from 'ionic-native';
419

420
// NFC service for tag operations
421
class NFCService {
422
  private ndefListener: any;
423
  private tagListener: any;
424
  
425
  async initialize(): Promise<boolean> {
426
    try {
427
      const isEnabled = await NFC.enabled();
428
      
429
      if (!isEnabled) {
430
        console.log('NFC not enabled');
431
        await NFC.showSettings();
432
        return false;
433
      }
434
      
435
      this.setupListeners();
436
      console.log('NFC service initialized');
437
      return true;
438
    } catch (error) {
439
      console.error('NFC initialization failed:', error);
440
      return false;
441
    }
442
  }
443
  
444
  private setupListeners(): void {
445
    // Listen for NDEF tags
446
    this.ndefListener = NFC.addNdefListener().subscribe(
447
      (event: NdefEvent) => {
448
        console.log('NDEF tag detected:', event);
449
        this.handleNdefTag(event);
450
      },
451
      (error) => {
452
        console.error('NDEF listener error:', error);
453
      }
454
    );
455
    
456
    // Listen for any NFC tags
457
    this.tagListener = NFC.addTagDiscoveredListener().subscribe(
458
      (event: TagEvent) => {
459
        console.log('NFC tag discovered:', event);
460
        this.handleTagDiscovery(event);
461
      },
462
      (error) => {
463
        console.error('Tag listener error:', error);
464
      }
465
    );
466
  }
467
  
468
  private handleNdefTag(event: NdefEvent): void {
469
    const message = event.message;
470
    
471
    message.forEach((record, index) => {
472
      const payload = this.parseNdefRecord(record);
473
      console.log(`NDEF Record ${index}:`, payload);
474
    });
475
  }
476
  
477
  private parseNdefRecord(record: NdefRecord): any {
478
    // Convert payload to string (simplified parsing)
479
    const payload = String.fromCharCode.apply(null, record.payload);
480
    
481
    // Handle different TNF types
482
    switch (record.tnf) {
483
      case 1: // Well Known Type
484
        return this.parseWellKnownType(record.type, payload);
485
      case 2: // MIME Media Type
486
        return { type: 'mime', payload };
487
      case 3: // Absolute URI
488
        return { type: 'uri', payload };
489
      case 4: // External Type
490
        return { type: 'external', payload };
491
      default:
492
        return { type: 'unknown', payload };
493
    }
494
  }
495
  
496
  private parseWellKnownType(type: number[], payload: string): any {
497
    const typeString = String.fromCharCode.apply(null, type);
498
    
499
    switch (typeString) {
500
      case 'T': // Text
501
        return { type: 'text', text: payload.substring(3) }; // Skip language code
502
      case 'U': // URI
503
        return { type: 'uri', uri: this.decodeUri(payload) };
504
      default:
505
        return { type: typeString, payload };
506
    }
507
  }
508
  
509
  private decodeUri(payload: string): string {
510
    // URI prefixes for NDEF URI records
511
    const uriPrefixes = [
512
      '', 'http://www.', 'https://www.', 'http://', 'https://',
513
      'tel:', 'mailto:', 'ftp://anonymous:anonymous@', 'ftp://ftp.',
514
      'ftps://', 'sftp://', 'smb://', 'nfs://', 'ftp://', 'dav://',
515
      'news:', 'telnet://', 'imap:', 'rtsp://', 'urn:', 'pop:',
516
      'sip:', 'sips:', 'tftp:', 'btspp://', 'btl2cap://', 'btgoep://',
517
      'tcpobex://', 'irdaobex://', 'file://', 'urn:epc:id:', 'urn:epc:tag:',
518
      'urn:epc:pat:', 'urn:epc:raw:', 'urn:epc:', 'urn:nfc:'
519
    ];
520
    
521
    const prefixIndex = payload.charCodeAt(0);
522
    const prefix = uriPrefixes[prefixIndex] || '';
523
    
524
    return prefix + payload.substring(1);
525
  }
526
  
527
  private handleTagDiscovery(event: TagEvent): void {
528
    console.log('Tag technologies:', event.tag.techTypes);
529
    
530
    // Handle different tag types
531
    if (event.tag.techTypes.includes('android.nfc.tech.Ndef')) {
532
      console.log('NDEF-compatible tag detected');
533
    }
534
    
535
    if (event.tag.techTypes.includes('android.nfc.tech.NdefFormatable')) {
536
      console.log('Formatable tag detected');
537
    }
538
  }
539
  
540
  async writeTextToTag(text: string, language: string = 'en'): Promise<void> {
541
    try {
542
      const textRecord = {
543
        tnf: 1, // Well Known Type
544
        type: [0x54], // 'T' for text
545
        payload: this.encodeTextPayload(text, language),
546
        id: []
547
      };
548
      
549
      await NFC.write([textRecord]);
550
      console.log('Text written to NFC tag:', text);
551
    } catch (error) {
552
      console.error('NFC write failed:', error);
553
      throw error;
554
    }
555
  }
556
  
557
  async writeUriToTag(uri: string): Promise<void> {
558
    try {
559
      const uriRecord = {
560
        tnf: 1, // Well Known Type
561
        type: [0x55], // 'U' for URI
562
        payload: this.encodeUriPayload(uri),
563
        id: []
564
      };
565
      
566
      await NFC.write([uriRecord]);
567
      console.log('URI written to NFC tag:', uri);
568
    } catch (error) {
569
      console.error('NFC URI write failed:', error);
570
      throw error;
571
    }
572
  }
573
  
574
  private encodeTextPayload(text: string, language: string): number[] {
575
    const langBytes = Array.from(language).map(c => c.charCodeAt(0));
576
    const textBytes = Array.from(text).map(c => c.charCodeAt(0));
577
    
578
    // Format: [flags, lang_length, ...lang_bytes, ...text_bytes]
579
    return [0x02, langBytes.length, ...langBytes, ...textBytes];
580
  }
581
  
582
  private encodeUriPayload(uri: string): number[] {
583
    // Find best URI prefix
584
    const prefixes = ['http://www.', 'https://www.', 'http://', 'https://'];
585
    let prefixIndex = 0;
586
    let remainder = uri;
587
    
588
    for (let i = 0; i < prefixes.length; i++) {
589
      if (uri.startsWith(prefixes[i])) {
590
        prefixIndex = i + 1;
591
        remainder = uri.substring(prefixes[i].length);
592
        break;
593
      }
594
    }
595
    
596
    const remainderBytes = Array.from(remainder).map(c => c.charCodeAt(0));
597
    return [prefixIndex, ...remainderBytes];
598
  }
599
  
600
  async makeTagReadOnly(): Promise<void> {
601
    try {
602
      await NFC.makeReadOnly();
603
      console.log('NFC tag made read-only');
604
    } catch (error) {
605
      console.error('Failed to make tag read-only:', error);
606
      throw error;
607
    }
608
  }
609
  
610
  async eraseTag(): Promise<void> {
611
    try {
612
      await NFC.erase();
613
      console.log('NFC tag erased');
614
    } catch (error) {
615
      console.error('Failed to erase tag:', error);
616
      throw error;
617
    }
618
  }
619
  
620
  destroy(): void {
621
    if (this.ndefListener) {
622
      this.ndefListener.unsubscribe();
623
    }
624
    
625
    if (this.tagListener) {
626
      this.tagListener.unsubscribe();
627
    }
628
  }
629
}
630

631
// NFC-based app launcher
632
class NFCAppLauncher extends NFCService {
633
  
634
  async createAppLaunchTag(appId: string, additionalData?: any): Promise<void> {
635
    const launchData = {
636
      action: 'launch_app',
637
      appId,
638
      data: additionalData,
639
      timestamp: new Date().toISOString()
640
    };
641
    
642
    const jsonString = JSON.stringify(launchData);
643
    await this.writeTextToTag(jsonString);
644
  }
645
  
646
  async createWiFiTag(ssid: string, password: string, security: string = 'WPA'): Promise<void> {
647
    // Create WiFi configuration URI
648
    const wifiUri = `WIFI:T:${security};S:${ssid};P:${password};;`;
649
    await this.writeTextToTag(wifiUri);
650
  }
651
  
652
  async createContactTag(contact: {
653
    name: string;
654
    phone?: string;
655
    email?: string;
656
    url?: string;
657
  }): Promise<void> {
658
    // Create vCard format
659
    let vcard = 'BEGIN:VCARD\nVERSION:3.0\n';
660
    vcard += `FN:${contact.name}\n`;
661
    
662
    if (contact.phone) {
663
      vcard += `TEL:${contact.phone}\n`;
664
    }
665
    
666
    if (contact.email) {
667
      vcard += `EMAIL:${contact.email}\n`;
668
    }
669
    
670
    if (contact.url) {
671
      vcard += `URL:${contact.url}\n`;
672
    }
673
    
674
    vcard += 'END:VCARD';
675
    
676
    await this.writeTextToTag(vcard);
677
  }
678
}
679
```
680

681
### Keyboard Management
682

683
Control and monitor device keyboard behavior, especially for input optimization and UI adjustments.
684

685
```typescript { .api }
686
/**
687
 * Keyboard class for keyboard management and events
688
 */
689
class Keyboard {
690
  /**
691
   * Hide keyboard programmatically
692
   */
693
  static hideKeyboard(): void;
694

695
  /**
696
   * Close keyboard (alias for hideKeyboard)
697
   */
698
  static close(): void;
699

700
  /**
701
   * Show keyboard programmatically
702
   */
703
  static show(): void;
704

705
  /**
706
   * Disable scroll when keyboard is shown
707
   * @param disable Whether to disable scroll
708
   */
709
  static disableScroll(disable: boolean): void;
710

711
  /**
712
   * Observable for keyboard show events
713
   * @returns Observable emitting keyboard show events
714
   */
715
  static onKeyboardShow(): Observable<any>;
716

717
  /**
718
   * Observable for keyboard hide events
719
   * @returns Observable emitting keyboard hide events
720
   */
721
  static onKeyboardHide(): Observable<any>;
722
}
723
```
724

725
**Usage Examples:**
726

727
```typescript
728
import { Keyboard } from 'ionic-native';
729

730
// Keyboard management service
731
class KeyboardManager {
732
  private showSubscription: any;
733
  private hideSubscription: any;
734
  private keyboardHeight = 0;
735
  private isKeyboardVisible = false;
736
  
737
  initialize(): void {
738
    this.setupKeyboardListeners();
739
    console.log('Keyboard manager initialized');
740
  }
741
  
742
  private setupKeyboardListeners(): void {
743
    // Listen for keyboard show events
744
    this.showSubscription = Keyboard.onKeyboardShow().subscribe(
745
      (event) => {
746
        console.log('Keyboard shown:', event);
747
        this.isKeyboardVisible = true;
748
        this.keyboardHeight = event.keyboardHeight || 0;
749
        this.handleKeyboardShow(event);
750
      }
751
    );
752
    
753
    // Listen for keyboard hide events
754
    this.hideSubscription = Keyboard.onKeyboardHide().subscribe(
755
      (event) => {
756
        console.log('Keyboard hidden:', event);
757
        this.isKeyboardVisible = false;
758
        this.keyboardHeight = 0;
759
        this.handleKeyboardHide(event);
760
      }
761
    );
762
  }
763
  
764
  private handleKeyboardShow(event: any): void {
765
    // Adjust UI layout for keyboard
766
    this.adjustLayoutForKeyboard(event.keyboardHeight);
767
    
768
    // Disable page scrolling if needed
769
    Keyboard.disableScroll(true);
770
    
771
    // Ensure input field is visible
772
    this.ensureInputVisible();
773
  }
774
  
775
  private handleKeyboardHide(event: any): void {
776
    // Reset UI layout
777
    this.resetLayoutAfterKeyboard();
778
    
779
    // Re-enable page scrolling
780
    Keyboard.disableScroll(false);
781
  }
782
  
783
  private adjustLayoutForKeyboard(keyboardHeight: number): void {
784
    // Adjust content padding/margin to account for keyboard
785
    const content = document.querySelector('.main-content') as HTMLElement;
786
    if (content) {
787
      content.style.paddingBottom = `${keyboardHeight}px`;
788
    }
789
    
790
    // Adjust floating elements
791
    const floatingElements = document.querySelectorAll('.floating-element');
792
    floatingElements.forEach((element: HTMLElement) => {
793
      element.style.bottom = `${keyboardHeight}px`;
794
    });
795
  }
796
  
797
  private resetLayoutAfterKeyboard(): void {
798
    // Reset content padding
799
    const content = document.querySelector('.main-content') as HTMLElement;
800
    if (content) {
801
      content.style.paddingBottom = '';
802
    }
803
    
804
    // Reset floating elements
805
    const floatingElements = document.querySelectorAll('.floating-element');
806
    floatingElements.forEach((element: HTMLElement) => {
807
      element.style.bottom = '';
808
    });
809
  }
810
  
811
  private ensureInputVisible(): void {
812
    // Scroll active input into view
813
    const activeElement = document.activeElement as HTMLElement;
814
    if (activeElement && this.isInputElement(activeElement)) {
815
      setTimeout(() => {
816
        activeElement.scrollIntoView({ behavior: 'smooth', block: 'center' });
817
      }, 300);
818
    }
819
  }
820
  
821
  private isInputElement(element: HTMLElement): boolean {
822
    const inputTypes = ['input', 'textarea', 'select'];
823
    return inputTypes.includes(element.tagName.toLowerCase());
824
  }
825
  
826
  // Public methods
827
  showKeyboard(): void {
828
    Keyboard.show();
829
  }
830
  
831
  hideKeyboard(): void {
832
    Keyboard.hideKeyboard();
833
  }
834
  
835
  closeKeyboard(): void {
836
    Keyboard.close();
837
  }
838
  
839
  isVisible(): boolean {
840
    return this.isKeyboardVisible;
841
  }
842
  
843
  getHeight(): number {
844
    return this.keyboardHeight;
845
  }
846
  
847
  setScrollDisabled(disabled: boolean): void {
848
    Keyboard.disableScroll(disabled);
849
  }
850
  
851
  destroy(): void {
852
    if (this.showSubscription) {
853
      this.showSubscription.unsubscribe();
854
    }
855
    
856
    if (this.hideSubscription) {
857
      this.hideSubscription.unsubscribe();
858
    }
859
  }
860
}
861

862
// Enhanced keyboard service with form optimization
863
class SmartKeyboardService extends KeyboardManager {
864
  private activeForm: HTMLFormElement | null = null;
865
  private inputQueue: HTMLElement[] = [];
866
  private currentInputIndex = 0;
867
  
868
  initialize(): void {
869
    super.initialize();
870
    this.setupFormHandling();
871
  }
872
  
873
  private setupFormHandling(): void {
874
    // Monitor form focus events
875
    document.addEventListener('focusin', (event) => {
876
      const target = event.target as HTMLElement;
877
      
878
      if (this.isInputElement(target)) {
879
        this.handleInputFocus(target);
880
      }
881
    });
882
    
883
    // Monitor form submit events
884
    document.addEventListener('submit', (event) => {
885
      this.handleFormSubmit(event.target as HTMLFormElement);
886
    });
887
  }
888
  
889
  private handleInputFocus(input: HTMLElement): void {
890
    // Find parent form
891
    this.activeForm = input.closest('form');
892
    
893
    if (this.activeForm) {
894
      this.buildInputQueue();
895
      this.currentInputIndex = this.inputQueue.indexOf(input);
896
      this.setupFormNavigation();
897
    }
898
  }
899
  
900
  private buildInputQueue(): void {
901
    if (!this.activeForm) return;
902
    
903
    // Get all form inputs in tab order
904
    const inputs = Array.from(this.activeForm.querySelectorAll('input, textarea, select'))
905
      .filter((input: HTMLElement) => {
906
        return !input.hasAttribute('disabled') && 
907
               !input.hasAttribute('readonly') &&
908
               input.offsetParent !== null; // Visible elements only
909
      }) as HTMLElement[];
910
    
911
    this.inputQueue = inputs.sort((a, b) => {
912
      const aIndex = parseInt(a.getAttribute('tabindex') || '0');
913
      const bIndex = parseInt(b.getAttribute('tabindex') || '0');
914
      return aIndex - bIndex;
915
    });
916
  }
917
  
918
  private setupFormNavigation(): void {
919
    // Add next/previous buttons to keyboard toolbar if supported
920
    this.addKeyboardToolbar();
921
  }
922
  
923
  private addKeyboardToolbar(): void {
924
    // Create navigation buttons above keyboard
925
    const toolbar = document.createElement('div');
926
    toolbar.className = 'keyboard-toolbar';
927
    toolbar.innerHTML = `
928
      <button id="prev-input" ${this.currentInputIndex === 0 ? 'disabled' : ''}>Previous</button>
929
      <button id="next-input" ${this.currentInputIndex === this.inputQueue.length - 1 ? 'disabled' : ''}>Next</button>
930
      <button id="done-input">Done</button>
931
    `;
932
    
933
    // Position toolbar above keyboard
934
    toolbar.style.cssText = `
935
      position: fixed;
936
      bottom: ${this.getHeight()}px;
937
      left: 0;
938
      right: 0;
939
      background: #f0f0f0;
940
      border-top: 1px solid #ccc;
941
      padding: 8px;
942
      display: flex;
943
      justify-content: space-between;
944
      z-index: 9999;
945
    `;
946
    
947
    document.body.appendChild(toolbar);
948
    
949
    // Add event listeners
950
    document.getElementById('prev-input')?.addEventListener('click', () => this.goToPreviousInput());
951
    document.getElementById('next-input')?.addEventListener('click', () => this.goToNextInput());
952
    document.getElementById('done-input')?.addEventListener('click', () => this.hideKeyboard());
953
    
954
    // Remove toolbar when keyboard hides
955
    const hideSubscription = Keyboard.onKeyboardHide().subscribe(() => {
956
      toolbar.remove();
957
      hideSubscription.unsubscribe();
958
    });
959
  }
960
  
961
  private goToPreviousInput(): void {
962
    if (this.currentInputIndex > 0) {
963
      this.currentInputIndex--;
964
      this.inputQueue[this.currentInputIndex].focus();
965
    }
966
  }
967
  
968
  private goToNextInput(): void {
969
    if (this.currentInputIndex < this.inputQueue.length - 1) {
970
      this.currentInputIndex++;
971
      this.inputQueue[this.currentInputIndex].focus();
972
    }
973
  }
974
  
975
  private handleFormSubmit(form: HTMLFormElement): void {
976
    // Hide keyboard on form submit
977
    this.hideKeyboard();
978
  }
979
  
980
  // Auto-resize text areas
981
  setupAutoResizeTextarea(textarea: HTMLTextAreaElement): void {
982
    const adjust = () => {
983
      textarea.style.height = 'auto';
984
      textarea.style.height = textarea.scrollHeight + 'px';
985
    };
986
    
987
    textarea.addEventListener('input', adjust);
988
    textarea.addEventListener('focus', adjust);
989
    
990
    // Initial adjustment
991
    adjust();
992
  }
993
  
994
  // Smart input validation
995
  setupSmartValidation(input: HTMLInputElement): void {
996
    input.addEventListener('blur', () => {
997
      this.validateInput(input);
998
    });
999
    
1000
    input.addEventListener('input', () => {
1001
      // Real-time validation for certain types
1002
      if (input.type === 'email' || input.type === 'tel') {
1003
        this.validateInput(input);
1004
      }
1005
    });
1006
  }
1007
  
1008
  private validateInput(input: HTMLInputElement): void {
1009
    const value = input.value.trim();
1010
    
1011
    switch (input.type) {
1012
      case 'email':
1013
        const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
1014
        this.setValidationState(input, emailRegex.test(value) || value === '');
1015
        break;
1016
        
1017
      case 'tel':
1018
        const phoneRegex = /^[\d\s\-\+\(\)]+$/;
1019
        this.setValidationState(input, phoneRegex.test(value) || value === '');
1020
        break;
1021
        
1022
      case 'url':
1023
        try {
1024
          new URL(value);
1025
          this.setValidationState(input, true);
1026
        } catch {
1027
          this.setValidationState(input, value === '');
1028
        }
1029
        break;
1030
    }
1031
  }
1032
  
1033
  private setValidationState(input: HTMLInputElement, isValid: boolean): void {
1034
    if (isValid) {
1035
      input.classList.remove('invalid');
1036
      input.classList.add('valid');
1037
    } else {
1038
      input.classList.remove('valid');
1039
      input.classList.add('invalid');
1040
    }
1041
  }
1042
}
1043

1044
// Usage
1045
const keyboardManager = new SmartKeyboardService();
1046
keyboardManager.initialize();
1047

1048
// Auto-setup for forms
1049
document.addEventListener('DOMContentLoaded', () => {
1050
  // Setup auto-resize for all textareas
1051
  document.querySelectorAll('textarea').forEach(textarea => {
1052
    keyboardManager.setupAutoResizeTextarea(textarea as HTMLTextAreaElement);
1053
  });
1054
  
1055
  // Setup smart validation for inputs
1056
  document.querySelectorAll('input[type="email"], input[type="tel"], input[type="url"]').forEach(input => {
1057
    keyboardManager.setupSmartValidation(input as HTMLInputElement);
1058
  });
1059
});
1060
```