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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* a list of the recomputation that needs to be done in response to a
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* style change
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*/
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#ifndef nsStyleChangeList_h___
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#define nsStyleChangeList_h___
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#include "mozilla/Attributes.h"
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#include "nsError.h"
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#include "nsChangeHint.h"
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class nsIFrame;
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class nsIContent;
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// XXX would all platforms support putting this inside the list?
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struct nsStyleChangeData {
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nsIFrame* mFrame;
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nsIContent* mContent;
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nsChangeHint mHint;
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};
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static const uint32_t kStyleChangeBufferSize = 10;
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// Note: nsStyleChangeList owns a reference to
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// nsIContent pointers in its list.
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class nsStyleChangeList {
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public:
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nsStyleChangeList();
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~nsStyleChangeList();
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int32_t Count(void) const {
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return mCount;
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}
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/**
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* Fills in pointers without reference counting.
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*/
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nsresult ChangeAt(int32_t aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
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nsChangeHint& aHint) const;
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/**
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* Fills in a pointer to the list entry storage (no reference counting
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* involved).
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*/
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nsresult ChangeAt(int32_t aIndex, const nsStyleChangeData** aChangeData) const;
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nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
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void Clear(void);
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protected:
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nsStyleChangeList& operator=(const nsStyleChangeList& aCopy);
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bool operator==(const nsStyleChangeList& aOther) const;
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nsStyleChangeData* mArray;
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int32_t mArraySize;
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int32_t mCount;
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nsStyleChangeData mBuffer[kStyleChangeBufferSize];
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private:
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nsStyleChangeList(const nsStyleChangeList&) = delete;
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};
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#endif /* nsStyleChangeList_h___ */
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