nsStyleChangeList.h (1558B)
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 /* 8 * a list of the recomputation that needs to be done in response to a 9 * style change 10 */ 11 12 #ifndef nsStyleChangeList_h___ 13 #define nsStyleChangeList_h___ 14 15 #include "nsCOMPtr.h" 16 #include "nsChangeHint.h" 17 #include "nsTArray.h" 18 19 class nsIFrame; 20 class nsIContent; 21 22 struct nsStyleChangeData { 23 nsIFrame* mFrame; // weak 24 nsCOMPtr<nsIContent> mContent; 25 nsChangeHint mHint; 26 }; 27 28 class nsStyleChangeList : private AutoTArray<nsStyleChangeData, 10> { 29 typedef AutoTArray<nsStyleChangeData, 10> base_type; 30 nsStyleChangeList(const nsStyleChangeList&) = delete; 31 32 public: 33 using base_type::begin; 34 using base_type::Clear; 35 using base_type::end; 36 using base_type::IsEmpty; 37 using base_type::Length; 38 using base_type::operator[]; 39 40 MOZ_COUNTED_DEFAULT_CTOR(nsStyleChangeList) 41 MOZ_COUNTED_DTOR(nsStyleChangeList) 42 void AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint); 43 44 // Starting from the end of the list, removes all changes until the list is 45 // empty or an element with |mContent != aContent| is found. 46 void PopChangesForContent(nsIContent* aContent) { 47 while (!IsEmpty() && LastElement().mContent == aContent) { 48 RemoveLastElement(); 49 } 50 } 51 }; 52 53 #endif /* nsStyleChangeList_h___ */