Genarrative/src/services/clipboard.ts

import { writeHostClipboardText } from './host-bridge/hostBridge';

export async function copyTextToClipboard(value: string) {
  const text = value.trim();
  if (!text) {
    return false;
  }

  if (await writeHostClipboardText({ text })) {
    return true;
  }

  if (typeof navigator !== 'undefined' && navigator.clipboard?.writeText) {
    try {
      await navigator.clipboard.writeText(text);
      return true;
    } catch {
      // 部分内嵌浏览器会暴露 Clipboard API，但会因权限上下文拒绝写入，继续走兼容路径。
    }
  }

  if (typeof document === 'undefined') {
    return false;
  }

  const textarea = document.createElement('textarea');
  textarea.value = text;
  textarea.setAttribute('readonly', 'true');
  textarea.style.position = 'fixed';
  textarea.style.left = '-9999px';
  textarea.style.top = '0';
  document.body.appendChild(textarea);

  const selection = document.getSelection();
  const selectedRange =
    selection && selection.rangeCount > 0 ? selection.getRangeAt(0) : null;

  textarea.focus();
  textarea.select();

  let copied = false;
  try {
    copied =
      typeof document.execCommand === 'function' &&
      document.execCommand('copy');
  } catch {
    copied = false;
  } finally {
    document.body.removeChild(textarea);
    if (selection) {
      selection.removeAllRanges();
      if (selectedRange) {
        selection.addRange(selectedRange);
      }
    }
  }

  return copied;
}