Apply Format Operation

interface ApplyFormatOperation extends Operation {
  type: 'applyFormat';
  path: Path;
  length: number; // Range to format
  format: string; // Format name (e.g., 'bold', 'italic')
  value: any; // Format value
}

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

// Apply multiple formats in transaction
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(); // Single undo entry
}

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