mirror of
https://github.com/mozilla/gecko-dev.git
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69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/* -*- 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 "mozilla/StyleBackendType.h"
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#include "nsChangeHint.h"
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#include "nsCOMPtr.h"
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class nsIFrame;
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class nsIContent;
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struct nsStyleChangeData
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{
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nsIFrame* mFrame; // weak
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nsCOMPtr<nsIContent> mContent;
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nsChangeHint mHint;
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};
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class nsStyleChangeList : private AutoTArray<nsStyleChangeData, 10>
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{
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typedef AutoTArray<nsStyleChangeData, 10> base_type;
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nsStyleChangeList(const nsStyleChangeList&) = delete;
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public:
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using base_type::begin;
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using base_type::end;
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using base_type::IsEmpty;
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using base_type::Clear;
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using base_type::Length;
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using base_type::operator[];
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explicit nsStyleChangeList(mozilla::StyleBackendType aType) :
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mType(aType) { MOZ_COUNT_CTOR(nsStyleChangeList); }
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~nsStyleChangeList() { MOZ_COUNT_DTOR(nsStyleChangeList); }
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void AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
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// Starting from the end of the list, removes all changes until the list is
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// empty or an element with |mContent != aContent| is found.
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void PopChangesForContent(nsIContent* aContent)
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{
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while (Length() > 0) {
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if (LastElement().mContent == aContent) {
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RemoveElementAt(Length() - 1);
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} else {
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break;
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}
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}
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}
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bool IsGecko() const { return mType == mozilla::StyleBackendType::Gecko; }
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bool IsServo() const { return mType == mozilla::StyleBackendType::Servo; }
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private:
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mozilla::StyleBackendType mType;
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};
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#endif /* nsStyleChangeList_h___ */
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