dom/base/BorrowedAttrInfo.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef BorrowedAttrInfo_h__
   8 #define BorrowedAttrInfo_h__
   9
  10 #include "mozilla/Assertions.h"
  11
  12 class nsAttrName;
  13 class nsAttrValue;
  14
  15 namespace mozilla::dom {
  16
  17 /**
  18  * Struct that stores info on an attribute. The name and value must either both
  19  * be null or both be non-null.
  20  *
  21  * Note that, just as the pointers returned by GetAttrNameAt, the pointers that
  22  * this struct hold are only valid until the element or its attributes are
  23  * mutated (directly or via script).
  24  */
  25 struct BorrowedAttrInfo {
  26   BorrowedAttrInfo() : mName(nullptr), mValue(nullptr) {}
  27
  28   BorrowedAttrInfo(const nsAttrName* aName, const nsAttrValue* aValue);
  29
  30   BorrowedAttrInfo(const BorrowedAttrInfo& aOther);
  31
  32   const nsAttrName* mName;
  33   const nsAttrValue* mValue;
  34
  35   explicit operator bool() const { return mName != nullptr; }
  36 };
  37
  38 }  // namespace mozilla::dom
  39 #endif