Apply Format Operation

interface ApplyFormatOperation extends Operation {
  type: 'applyFormat';
  path: Path;
  length: number; // 서식 적용할 범위
  format: string; // 서식 이름 (예: 'bold', 'italic')
  value: any; // 서식 값
}

// 굵게 서식 적용
function applyBold(editor: Editor, selection: Selection) {
  const operation: ApplyFormatOperation = {
    type: 'applyFormat',
    path: selection.start,
    length: selection.length,
    format: 'bold',
    value: true
  };
  
  editor.applyOperation(operation);
}

// Transaction에서 여러 서식 적용
function applyFormats(editor: Editor, selection: Selection, formats: string[]) {
  const tx = editor.beginTransaction();
  
  for (const format of formats) {
    tx.add({
      type: 'applyFormat',
      path: selection.start,
      length: selection.length,
      format: format,
      value: true
    });
  }
  
  tx.commit(); // 단일 undo entry
}

function getInverse(operation: ApplyFormatOperation): RemoveFormatOperation {
  return {
    type: 'removeFormat',
    path: operation.path,
    length: operation.length,
    format: operation.format
  };
}