1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/FrameChildList.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,126 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef FrameChildList_h_
1.11 +#define FrameChildList_h_
1.12 +
1.13 +#include "nsFrameList.h"
1.14 +#include "nsTArray.h"
1.15 +
1.16 +class nsIFrame;
1.17 +
1.18 +namespace mozilla {
1.19 +namespace layout {
1.20 +
1.21 +// enum FrameChildListID lives in nsFrameList.h to solve circular dependencies.
1.22 +
1.23 +#ifdef DEBUG_FRAME_DUMP
1.24 +extern const char* ChildListName(FrameChildListID aListID);
1.25 +#endif
1.26 +
1.27 +class FrameChildListIDs {
1.28 +friend class FrameChildListIterator;
1.29 + public:
1.30 + FrameChildListIDs() : mIDs(0) {}
1.31 + FrameChildListIDs(const FrameChildListIDs& aOther) : mIDs(aOther.mIDs) {}
1.32 + FrameChildListIDs(FrameChildListID aListID) : mIDs(aListID) {}
1.33 +
1.34 + FrameChildListIDs operator|(FrameChildListIDs aOther) const {
1.35 + return FrameChildListIDs(mIDs | aOther.mIDs);
1.36 + }
1.37 + FrameChildListIDs& operator|=(FrameChildListIDs aOther) {
1.38 + mIDs |= aOther.mIDs;
1.39 + return *this;
1.40 + }
1.41 + bool operator==(FrameChildListIDs aOther) const {
1.42 + return mIDs == aOther.mIDs;
1.43 + }
1.44 + bool operator!=(FrameChildListIDs aOther) const {
1.45 + return !(*this == aOther);
1.46 + }
1.47 + bool Contains(FrameChildListIDs aOther) const {
1.48 + return (mIDs & aOther.mIDs) == aOther.mIDs;
1.49 + }
1.50 +
1.51 + protected:
1.52 + FrameChildListIDs(uint32_t aIDs) : mIDs(aIDs) {}
1.53 + uint32_t mIDs;
1.54 +};
1.55 +
1.56 +class FrameChildList {
1.57 + public:
1.58 + FrameChildList(const nsFrameList& aList, FrameChildListID aID)
1.59 + : mList(aList), mID(aID) {}
1.60 + nsFrameList mList;
1.61 + FrameChildListID mID;
1.62 +};
1.63 +
1.64 +/**
1.65 + * A class to iterate frame child lists.
1.66 + */
1.67 +class MOZ_STACK_CLASS FrameChildListArrayIterator {
1.68 + public:
1.69 + FrameChildListArrayIterator(const nsTArray<FrameChildList>& aLists)
1.70 + : mLists(aLists), mCurrentIndex(0) {}
1.71 + bool IsDone() const { return mCurrentIndex >= mLists.Length(); }
1.72 + FrameChildListID CurrentID() const {
1.73 + NS_ASSERTION(!IsDone(), "CurrentID(): iterator at end");
1.74 + return mLists[mCurrentIndex].mID;
1.75 + }
1.76 + const nsFrameList& CurrentList() const {
1.77 + NS_ASSERTION(!IsDone(), "CurrentList(): iterator at end");
1.78 + return mLists[mCurrentIndex].mList;
1.79 + }
1.80 + void Next() {
1.81 + NS_ASSERTION(!IsDone(), "Next(): iterator at end");
1.82 + ++mCurrentIndex;
1.83 + }
1.84 +
1.85 +protected:
1.86 + const nsTArray<FrameChildList>& mLists;
1.87 + uint32_t mCurrentIndex;
1.88 +};
1.89 +
1.90 +/**
1.91 + * A class for retrieving a frame's child lists and iterate them.
1.92 + */
1.93 +class MOZ_STACK_CLASS FrameChildListIterator
1.94 + : public FrameChildListArrayIterator {
1.95 + public:
1.96 + FrameChildListIterator(const nsIFrame* aFrame);
1.97 +
1.98 +protected:
1.99 + nsAutoTArray<FrameChildList,4> mLists;
1.100 +};
1.101 +
1.102 +inline mozilla::layout::FrameChildListIDs
1.103 +operator|(mozilla::layout::FrameChildListID aLeftOp,
1.104 + mozilla::layout::FrameChildListID aRightOp)
1.105 +{
1.106 + return mozilla::layout::FrameChildListIDs(aLeftOp) |
1.107 + mozilla::layout::FrameChildListIDs(aRightOp);
1.108 +}
1.109 +
1.110 +inline mozilla::layout::FrameChildListIDs
1.111 +operator|(mozilla::layout::FrameChildListID aLeftOp,
1.112 + mozilla::layout::FrameChildListIDs aRightOp)
1.113 +{
1.114 + return mozilla::layout::FrameChildListIDs(aLeftOp) | aRightOp;
1.115 +}
1.116 +
1.117 +} // namespace layout
1.118 +} // namespace mozilla
1.119 +
1.120 +inline void nsFrameList::AppendIfNonempty(
1.121 + nsTArray<mozilla::layout::FrameChildList>* aLists,
1.122 + mozilla::layout::FrameChildListID aListID) const
1.123 +{
1.124 + if (NotEmpty()) {
1.125 + aLists->AppendElement(mozilla::layout::FrameChildList(*this, aListID));
1.126 + }
1.127 +}
1.128 +
1.129 +#endif /* !defined(FrameChildList_h_) */
