зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
1.9 KiB
C++
69 строки
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* a list of the recomputation that needs to be done in response to a
|
|
* style change
|
|
*/
|
|
|
|
#ifndef nsStyleChangeList_h___
|
|
#define nsStyleChangeList_h___
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/StyleBackendType.h"
|
|
|
|
#include "nsChangeHint.h"
|
|
#include "nsCOMPtr.h"
|
|
|
|
class nsIFrame;
|
|
class nsIContent;
|
|
|
|
struct nsStyleChangeData
|
|
{
|
|
nsIFrame* mFrame; // weak
|
|
nsCOMPtr<nsIContent> mContent;
|
|
nsChangeHint mHint;
|
|
};
|
|
|
|
class nsStyleChangeList : private AutoTArray<nsStyleChangeData, 10>
|
|
{
|
|
typedef AutoTArray<nsStyleChangeData, 10> base_type;
|
|
nsStyleChangeList(const nsStyleChangeList&) = delete;
|
|
|
|
public:
|
|
using base_type::begin;
|
|
using base_type::end;
|
|
using base_type::IsEmpty;
|
|
using base_type::Clear;
|
|
using base_type::Length;
|
|
using base_type::operator[];
|
|
|
|
explicit nsStyleChangeList(mozilla::StyleBackendType aType) :
|
|
mType(aType) { MOZ_COUNT_CTOR(nsStyleChangeList); }
|
|
~nsStyleChangeList() { MOZ_COUNT_DTOR(nsStyleChangeList); }
|
|
void AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint);
|
|
|
|
// Starting from the end of the list, removes all changes until the list is
|
|
// empty or an element with |mContent != aContent| is found.
|
|
void PopChangesForContent(nsIContent* aContent)
|
|
{
|
|
while (Length() > 0) {
|
|
if (LastElement().mContent == aContent) {
|
|
RemoveElementAt(Length() - 1);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool IsGecko() const { return mType == mozilla::StyleBackendType::Gecko; }
|
|
bool IsServo() const { return mType == mozilla::StyleBackendType::Servo; }
|
|
|
|
private:
|
|
mozilla::StyleBackendType mType;
|
|
};
|
|
|
|
#endif /* nsStyleChangeList_h___ */
|