The Tor Browser: layout/base/nsStyleChangeList.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

     7  * a list of the recomputation that needs to be done in response to a

     8  * style change

     9  */

    11 #ifndef nsStyleChangeList_h___

    12 #define nsStyleChangeList_h___

    14 #include "mozilla/Attributes.h"

    16 #include "nsError.h"

    17 #include "nsChangeHint.h"

    19 class nsIFrame;

    20 class nsIContent;

    22 // XXX would all platforms support putting this inside the list?

    23 struct nsStyleChangeData {

    24   nsIFrame*   mFrame;

    25   nsIContent* mContent;

    26   nsChangeHint mHint;

    27 };

    29 static const uint32_t kStyleChangeBufferSize = 10;

    31 // Note:  nsStyleChangeList owns a reference to

    32 //  nsIContent pointers in its list.

    33 class nsStyleChangeList {

    34 public:

    35   nsStyleChangeList();

    36   ~nsStyleChangeList();

    38   int32_t Count(void) const {

    39     return mCount;

    40   }

    42   /**

    43    * Fills in pointers without reference counting.

    44    */

    45   nsresult ChangeAt(int32_t aIndex, nsIFrame*& aFrame, nsIContent*& aContent,

    46                     nsChangeHint& aHint) const;

    48   /**

    49    * Fills in a pointer to the list entry storage (no reference counting

    50    * involved).

    51    */

    52   nsresult ChangeAt(int32_t aIndex, const nsStyleChangeData** aChangeData) const;

    54   nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);

    56   void Clear(void);

    58 protected:

    59   nsStyleChangeList&  operator=(const nsStyleChangeList& aCopy);

    60   bool                operator==(const nsStyleChangeList& aOther) const;

    62   nsStyleChangeData*  mArray;

    63   int32_t             mArraySize;

    64   int32_t             mCount;

    65   nsStyleChangeData   mBuffer[kStyleChangeBufferSize];

    67 private:

    68   nsStyleChangeList(const nsStyleChangeList&) MOZ_DELETE;

    69 };

    72 #endif /* nsStyleChangeList_h___ */

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