mirror of
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127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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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 "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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class FrameChildListIDs {
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friend class FrameChildListIterator;
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public:
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FrameChildListIDs() : mIDs(0) {}
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FrameChildListIDs(const FrameChildListIDs& aOther) : mIDs(aOther.mIDs) {}
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MOZ_IMPLICIT FrameChildListIDs(FrameChildListID aListID) : mIDs(aListID) {}
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FrameChildListIDs operator|(FrameChildListIDs aOther) const {
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return FrameChildListIDs(mIDs | aOther.mIDs);
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}
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FrameChildListIDs& operator|=(FrameChildListIDs aOther) {
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mIDs |= aOther.mIDs;
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return *this;
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}
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bool operator==(FrameChildListIDs aOther) const {
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return mIDs == aOther.mIDs;
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}
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bool operator!=(FrameChildListIDs aOther) const {
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return !(*this == aOther);
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}
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bool Contains(FrameChildListIDs aOther) const {
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return (mIDs & aOther.mIDs) == aOther.mIDs;
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}
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protected:
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explicit FrameChildListIDs(uint32_t aIDs) : mIDs(aIDs) {}
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uint32_t mIDs;
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};
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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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nsAutoTArray<FrameChildList,4> mLists;
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};
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inline mozilla::layout::FrameChildListIDs
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operator|(mozilla::layout::FrameChildListID aLeftOp,
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mozilla::layout::FrameChildListID aRightOp)
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{
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return mozilla::layout::FrameChildListIDs(aLeftOp) |
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mozilla::layout::FrameChildListIDs(aRightOp);
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}
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inline mozilla::layout::FrameChildListIDs
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operator|(mozilla::layout::FrameChildListID aLeftOp,
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mozilla::layout::FrameChildListIDs aRightOp)
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{
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return mozilla::layout::FrameChildListIDs(aLeftOp) | aRightOp;
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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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{
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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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