1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsStyleChangeList.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,72 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * a list of the recomputation that needs to be done in response to a
1.11 + * style change
1.12 + */
1.13 +
1.14 +#ifndef nsStyleChangeList_h___
1.15 +#define nsStyleChangeList_h___
1.16 +
1.17 +#include "mozilla/Attributes.h"
1.18 +
1.19 +#include "nsError.h"
1.20 +#include "nsChangeHint.h"
1.21 +
1.22 +class nsIFrame;
1.23 +class nsIContent;
1.24 +
1.25 +// XXX would all platforms support putting this inside the list?
1.26 +struct nsStyleChangeData {
1.27 + nsIFrame* mFrame;
1.28 + nsIContent* mContent;
1.29 + nsChangeHint mHint;
1.30 +};
1.31 +
1.32 +static const uint32_t kStyleChangeBufferSize = 10;
1.33 +
1.34 +// Note: nsStyleChangeList owns a reference to
1.35 +// nsIContent pointers in its list.
1.36 +class nsStyleChangeList {
1.37 +public:
1.38 + nsStyleChangeList();
1.39 + ~nsStyleChangeList();
1.40 +
1.41 + int32_t Count(void) const {
1.42 + return mCount;
1.43 + }
1.44 +
1.45 + /**
1.46 + * Fills in pointers without reference counting.
1.47 + */
1.48 + nsresult ChangeAt(int32_t aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
1.49 + nsChangeHint& aHint) const;
1.50 +
1.51 + /**
1.52 + * Fills in a pointer to the list entry storage (no reference counting
1.53 + * involved).
1.54 + */
1.55 + nsresult ChangeAt(int32_t aIndex, const nsStyleChangeData** aChangeData) const;
1.56 +
1.57 + nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
1.58 +
1.59 + void Clear(void);
1.60 +
1.61 +protected:
1.62 + nsStyleChangeList& operator=(const nsStyleChangeList& aCopy);
1.63 + bool operator==(const nsStyleChangeList& aOther) const;
1.64 +
1.65 + nsStyleChangeData* mArray;
1.66 + int32_t mArraySize;
1.67 + int32_t mCount;
1.68 + nsStyleChangeData mBuffer[kStyleChangeBufferSize];
1.69 +
1.70 +private:
1.71 + nsStyleChangeList(const nsStyleChangeList&) MOZ_DELETE;
1.72 +};
1.73 +
1.74 +
1.75 +#endif /* nsStyleChangeList_h___ */
