setHTML for Quill pasting with HTML Delta

setHTML_test_quill.html

case 'setHTML':
  if (data.html) {
    // setTimeout to make this asynchronous and prevent blocking with large HTML
    setTimeout(function() {
      try {
        // Clear existing content
        editor.setContents([{ insert: '\n' }], Quill.sources.API);

        // For very large HTML, we need to handle it carefully
        const htmlString = String(data.html);

        // Use dangerouslyPasteHTML with proper error handling
        // This method can handle any HTML input, including large content
        editor.clipboard.dangerouslyPasteHTML(0, htmlString, Quill.sources.USER);

        // Removed the initial newline
        const length = editor.getLength();
        if (length > 1) {
          editor.deleteText(0, 1, Quill.sources.API);
        }

        sendJsonToFlutter({
          type: 'response',
          action: 'setHTML',
          success: true,
          message: 'HTML content set successfully',
          timestamp: Date.now()
        });
      } catch (e) {
        sendJsonToFlutter({
          type: 'response',
          action: 'setHTML',
          success: false,
          message: 'Error setting HTML: ' + (e.message || String(e)),
          timestamp: Date.now()
        });
      }
    }, 0);
  } else {
    sendJsonToFlutter({
      type: 'response',
      action: 'setHTML',
      success: false,
      message: 'No HTML content provided',
      timestamp: Date.now()
    });
  }
  break;