gecko-dev/layout/generic/FrameChildList.h
Ting-Yu Lin 3f639fd2fd Bug 1635319 Part 6 - Use EmplaceBack instead of AppendElement to append a FrameChildList into an array. r=mats
Using EmplaceBack instead of AppendElement can save us one
FrameChildList's copy construction.

Differential Revision: https://phabricator.services.mozilla.com/D75657
2020-05-18 01:15:42 +00:00

47 lines
1.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef FrameChildList_h_
#define FrameChildList_h_
#include "mozilla/EnumSet.h"
#include "nsFrameList.h"
#include "nsTArray.h"
class nsIFrame;
namespace mozilla {
namespace layout {
// enum FrameChildListID lives in nsFrameList.h to solve circular dependencies.
#ifdef DEBUG_FRAME_DUMP
extern const char* ChildListName(FrameChildListID aListID);
#endif
using FrameChildListIDs = EnumSet<FrameChildListID>;
class FrameChildList {
public:
FrameChildList(const nsFrameList& aList, FrameChildListID aID)
: mList(aList), mID(aID) {}
nsFrameList mList;
FrameChildListID mID;
};
} // namespace layout
} // namespace mozilla
inline void nsFrameList::AppendIfNonempty(
nsTArray<mozilla::layout::FrameChildList>* aLists,
mozilla::layout::FrameChildListID aListID) const {
if (NotEmpty()) {
aLists->EmplaceBack(*this, aListID);
}
}
#endif /* !defined(FrameChildList_h_) */