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       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 {
      16             : namespace dom {
      17             : 
      18             : /**
      19             :  * Struct that stores info on an attribute. The name and value must either both
      20             :  * be null or both be non-null.
      21             :  *
      22             :  * Note that, just as the pointers returned by GetAttrNameAt, the pointers that
      23             :  * this struct hold are only valid until the element or its attributes are
      24             :  * mutated (directly or via script).
      25             :  */
      26             : struct BorrowedAttrInfo
      27             : {
      28         150 :   BorrowedAttrInfo()
      29         150 :     : mName(nullptr)
      30         150 :     , mValue(nullptr)
      31             :   {
      32         150 :   }
      33             : 
      34             :   BorrowedAttrInfo(const nsAttrName* aName, const nsAttrValue* aValue);
      35             : 
      36             :   BorrowedAttrInfo(const BorrowedAttrInfo& aOther);
      37             : 
      38             :   const nsAttrName* mName;
      39             :   const nsAttrValue* mValue;
      40             : 
      41         242 :   explicit operator bool() const { return mName != nullptr; }
      42             : };
      43             : 
      44             : } // namespace dom
      45             : } // namespace mozilla
      46             : #endif