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/* -*- 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/. */
#ifndef FrameChildList_h_
#define FrameChildList_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
class FrameChildListIDs {
friend class FrameChildListIterator;
public:
FrameChildListIDs() : mIDs(0) {}
FrameChildListIDs(const FrameChildListIDs& aOther) : mIDs(aOther.mIDs) {}
MOZ_IMPLICIT FrameChildListIDs(FrameChildListID aListID) : mIDs(aListID) {}
FrameChildListIDs operator|(FrameChildListIDs aOther) const {
return FrameChildListIDs(mIDs | aOther.mIDs);
}
FrameChildListIDs& operator|=(FrameChildListIDs aOther) {
mIDs |= aOther.mIDs;
return *this;
}
bool operator==(FrameChildListIDs aOther) const {
return mIDs == aOther.mIDs;
}
bool operator!=(FrameChildListIDs aOther) const {
return !(*this == aOther);
}
bool Contains(FrameChildListIDs aOther) const {
return (mIDs & aOther.mIDs) == aOther.mIDs;
}
protected:
explicit FrameChildListIDs(uint32_t aIDs) : mIDs(aIDs) {}
uint32_t mIDs;
};
class FrameChildList {
public:
FrameChildList(const nsFrameList& aList, FrameChildListID aID)
: mList(aList), mID(aID) {}
nsFrameList mList;
FrameChildListID mID;
};
/**
* A class to iterate frame child lists.
*/
class MOZ_STACK_CLASS FrameChildListArrayIterator {
public:
explicit FrameChildListArrayIterator(const nsTArray<FrameChildList>& aLists)
: mLists(aLists), mCurrentIndex(0) {}
bool IsDone() const { return mCurrentIndex >= mLists.Length(); }
FrameChildListID CurrentID() const {
NS_ASSERTION(!IsDone(), "CurrentID(): iterator at end");
return mLists[mCurrentIndex].mID;
}
const nsFrameList& CurrentList() const {
NS_ASSERTION(!IsDone(), "CurrentList(): iterator at end");
return mLists[mCurrentIndex].mList;
}
void Next() {
NS_ASSERTION(!IsDone(), "Next(): iterator at end");
++mCurrentIndex;
}
protected:
const nsTArray<FrameChildList>& mLists;
uint32_t mCurrentIndex;
};
/**
* A class for retrieving a frame's child lists and iterate them.
*/
class MOZ_STACK_CLASS FrameChildListIterator
: public FrameChildListArrayIterator {
public:
explicit FrameChildListIterator(const nsIFrame* aFrame);
protected:
AutoTArray<FrameChildList,4> mLists;
};
inline mozilla::layout::FrameChildListIDs
operator|(mozilla::layout::FrameChildListID aLeftOp,
mozilla::layout::FrameChildListID aRightOp)
{
return mozilla::layout::FrameChildListIDs(aLeftOp) |
mozilla::layout::FrameChildListIDs(aRightOp);
}
inline mozilla::layout::FrameChildListIDs
operator|(mozilla::layout::FrameChildListID aLeftOp,
mozilla::layout::FrameChildListIDs aRightOp)
{
return mozilla::layout::FrameChildListIDs(aLeftOp) | aRightOp;
}
} // namespace layout
} // namespace mozilla
inline void nsFrameList::AppendIfNonempty(
nsTArray<mozilla::layout::FrameChildList>* aLists,
mozilla::layout::FrameChildListID aListID) const
{
if (NotEmpty()) {
aLists->AppendElement(mozilla::layout::FrameChildList(*this, aListID));
}
}
#endif /* !defined(FrameChildList_h_) */
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