michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * a list of the recomputation that needs to be done in response to a
michael@0:  * style change
michael@0:  */
michael@0: 
michael@0: #ifndef nsStyleChangeList_h___
michael@0: #define nsStyleChangeList_h___
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: #include "nsError.h"
michael@0: #include "nsChangeHint.h"
michael@0: 
michael@0: class nsIFrame;
michael@0: class nsIContent;
michael@0: 
michael@0: // XXX would all platforms support putting this inside the list?
michael@0: struct nsStyleChangeData {
michael@0:   nsIFrame*   mFrame;
michael@0:   nsIContent* mContent;
michael@0:   nsChangeHint mHint;
michael@0: };
michael@0: 
michael@0: static const uint32_t kStyleChangeBufferSize = 10;
michael@0: 
michael@0: // Note:  nsStyleChangeList owns a reference to
michael@0: //  nsIContent pointers in its list.
michael@0: class nsStyleChangeList {
michael@0: public:
michael@0:   nsStyleChangeList();
michael@0:   ~nsStyleChangeList();
michael@0: 
michael@0:   int32_t Count(void) const {
michael@0:     return mCount;
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Fills in pointers without reference counting.  
michael@0:    */
michael@0:   nsresult ChangeAt(int32_t aIndex, nsIFrame*& aFrame, nsIContent*& aContent,
michael@0:                     nsChangeHint& aHint) const;
michael@0: 
michael@0:   /**
michael@0:    * Fills in a pointer to the list entry storage (no reference counting
michael@0:    * involved).
michael@0:    */
michael@0:   nsresult ChangeAt(int32_t aIndex, const nsStyleChangeData** aChangeData) const;
michael@0: 
michael@0:   nsresult AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
michael@0: 
michael@0:   void Clear(void);
michael@0: 
michael@0: protected:
michael@0:   nsStyleChangeList&  operator=(const nsStyleChangeList& aCopy);
michael@0:   bool                operator==(const nsStyleChangeList& aOther) const;
michael@0: 
michael@0:   nsStyleChangeData*  mArray;
michael@0:   int32_t             mArraySize;
michael@0:   int32_t             mCount;
michael@0:   nsStyleChangeData   mBuffer[kStyleChangeBufferSize];
michael@0: 
michael@0: private:
michael@0:   nsStyleChangeList(const nsStyleChangeList&) MOZ_DELETE;
michael@0: };
michael@0: 
michael@0: 
michael@0: #endif /* nsStyleChangeList_h___ */