使用原生api清空剪切板

// 清空剪贴板的函数
export const clearClipboard = async () => {
  // 创建空白图片
      const canvas = document.createElement('canvas')
      canvas.width = 1
      canvas.height = 1
      const ctx = canvas.getContext('2d')
      ctx.fillStyle = 'white'
      ctx.fillRect(0, 0, 1, 1)

      // 转换为 blob 并写入剪贴板
      canvas.toBlob(async (blob) => {
        try {
          const item = new ClipboardItem({ 'image/png': blob })
          await navigator.clipboard.write([item])
          console.log('Image clipboard cleared')
        } catch (err) {
          console.error('Failed to clear image clipboard:', err)
        }
      }, 'image/png')
  try {
    await navigator.clipboard.writeText('')
    console.log('Clipboard cleared')
    return true
  } catch (err) {
    console.error('Failed to clear clipboard:', err)
    return false
  }
  try {
        // 尝试方法3：使用 document.execCommand (已废弃但兼容性好)
        const textArea = document.createElement('textarea')
        textArea.value = ''
        document.body.appendChild(textArea)
        textArea.select()
        document.execCommand('copy')
        document.body.removeChild(textArea)
        console.log('Cleared using execCommand')
      } catch (err3) {
        console.error('execCommand failed:', err3)
        throw new Error('All clipboard clearing methods failed')
      }
}

// 检查剪贴板权限
export const checkClipboardPermission = async () => {
  try {
    const result = await navigator.permissions.query({ name: 'clipboard-write' })
    console.log('Clipboard permission status:', result.state)
    return result.state
  } catch (err) {
    console.error('Clipboard permission check failed:', err)
    return 'denied'
  }
}

// 处理 PrintScreen 按键事件
export const handlePrintScreen = async (e) => {
  console.log('Key up detected:', {
    key: e.key,
    keyCode: e.keyCode,
    code: e.code
  })

  if (e.key === 'PrintScreen' || e.keyCode === 44 || e.code === 'PrintScreen') {
    console.log('PrintScreen key detected')
    e.preventDefault()
    return await clearClipboard()
  }
  return false
}