зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
2.3 KiB
C++
85 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef FrameChildList_h_
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#define FrameChildList_h_
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#include "mozilla/EnumSet.h"
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#include "nsFrameList.h"
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#include "nsTArray.h"
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class nsIFrame;
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namespace mozilla {
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namespace layout {
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// enum FrameChildListID lives in nsFrameList.h to solve circular dependencies.
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#ifdef DEBUG_FRAME_DUMP
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extern const char* ChildListName(FrameChildListID aListID);
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#endif
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using FrameChildListIDs = EnumSet<FrameChildListID>;
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class FrameChildList {
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public:
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FrameChildList(const nsFrameList& aList, FrameChildListID aID)
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: mList(aList), mID(aID) {}
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nsFrameList mList;
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FrameChildListID mID;
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};
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/**
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* A class to iterate frame child lists.
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*/
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class MOZ_STACK_CLASS FrameChildListArrayIterator {
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public:
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explicit FrameChildListArrayIterator(const nsTArray<FrameChildList>& aLists)
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: mLists(aLists), mCurrentIndex(0) {}
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bool IsDone() const { return mCurrentIndex >= mLists.Length(); }
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FrameChildListID CurrentID() const {
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NS_ASSERTION(!IsDone(), "CurrentID(): iterator at end");
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return mLists[mCurrentIndex].mID;
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}
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const nsFrameList& CurrentList() const {
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NS_ASSERTION(!IsDone(), "CurrentList(): iterator at end");
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return mLists[mCurrentIndex].mList;
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}
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void Next() {
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NS_ASSERTION(!IsDone(), "Next(): iterator at end");
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++mCurrentIndex;
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}
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protected:
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const nsTArray<FrameChildList>& mLists;
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uint32_t mCurrentIndex;
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};
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/**
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* A class for retrieving a frame's child lists and iterate them.
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*/
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class MOZ_STACK_CLASS FrameChildListIterator
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: public FrameChildListArrayIterator {
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public:
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explicit FrameChildListIterator(const nsIFrame* aFrame);
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protected:
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AutoTArray<FrameChildList, 4> mLists;
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};
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} // namespace layout
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} // namespace mozilla
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inline void nsFrameList::AppendIfNonempty(
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nsTArray<mozilla::layout::FrameChildList>* aLists,
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mozilla::layout::FrameChildListID aListID) const {
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if (NotEmpty()) {
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aLists->AppendElement(mozilla::layout::FrameChildList(*this, aListID));
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}
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}
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#endif /* !defined(FrameChildList_h_) */
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