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comparison: layout/generic/FrameChildList.h
layout/generic/FrameChildList.h
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- 6474c204b198
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| -1:000000000000 | 0:9533bd28b70c |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef FrameChildList_h_ | |
| 8 #define FrameChildList_h_ | |
| 9 | |
| 10 #include "nsFrameList.h" | |
| 11 #include "nsTArray.h" | |
| 12 | |
| 13 class nsIFrame; | |
| 14 | |
| 15 namespace mozilla { | |
| 16 namespace layout { | |
| 17 | |
| 18 // enum FrameChildListID lives in nsFrameList.h to solve circular dependencies. | |
| 19 | |
| 20 #ifdef DEBUG_FRAME_DUMP | |
| 21 extern const char* ChildListName(FrameChildListID aListID); | |
| 22 #endif | |
| 23 | |
| 24 class FrameChildListIDs { | |
| 25 friend class FrameChildListIterator; | |
| 26 public: | |
| 27 FrameChildListIDs() : mIDs(0) {} | |
| 28 FrameChildListIDs(const FrameChildListIDs& aOther) : mIDs(aOther.mIDs) {} | |
| 29 FrameChildListIDs(FrameChildListID aListID) : mIDs(aListID) {} | |
| 30 | |
| 31 FrameChildListIDs operator|(FrameChildListIDs aOther) const { | |
| 32 return FrameChildListIDs(mIDs | aOther.mIDs); | |
| 33 } | |
| 34 FrameChildListIDs& operator|=(FrameChildListIDs aOther) { | |
| 35 mIDs |= aOther.mIDs; | |
| 36 return *this; | |
| 37 } | |
| 38 bool operator==(FrameChildListIDs aOther) const { | |
| 39 return mIDs == aOther.mIDs; | |
| 40 } | |
| 41 bool operator!=(FrameChildListIDs aOther) const { | |
| 42 return !(*this == aOther); | |
| 43 } | |
| 44 bool Contains(FrameChildListIDs aOther) const { | |
| 45 return (mIDs & aOther.mIDs) == aOther.mIDs; | |
| 46 } | |
| 47 | |
| 48 protected: | |
| 49 FrameChildListIDs(uint32_t aIDs) : mIDs(aIDs) {} | |
| 50 uint32_t mIDs; | |
| 51 }; | |
| 52 | |
| 53 class FrameChildList { | |
| 54 public: | |
| 55 FrameChildList(const nsFrameList& aList, FrameChildListID aID) | |
| 56 : mList(aList), mID(aID) {} | |
| 57 nsFrameList mList; | |
| 58 FrameChildListID mID; | |
| 59 }; | |
| 60 | |
| 61 /** | |
| 62 * A class to iterate frame child lists. | |
| 63 */ | |
| 64 class MOZ_STACK_CLASS FrameChildListArrayIterator { | |
| 65 public: | |
| 66 FrameChildListArrayIterator(const nsTArray<FrameChildList>& aLists) | |
| 67 : mLists(aLists), mCurrentIndex(0) {} | |
| 68 bool IsDone() const { return mCurrentIndex >= mLists.Length(); } | |
| 69 FrameChildListID CurrentID() const { | |
| 70 NS_ASSERTION(!IsDone(), "CurrentID(): iterator at end"); | |
| 71 return mLists[mCurrentIndex].mID; | |
| 72 } | |
| 73 const nsFrameList& CurrentList() const { | |
| 74 NS_ASSERTION(!IsDone(), "CurrentList(): iterator at end"); | |
| 75 return mLists[mCurrentIndex].mList; | |
| 76 } | |
| 77 void Next() { | |
| 78 NS_ASSERTION(!IsDone(), "Next(): iterator at end"); | |
| 79 ++mCurrentIndex; | |
| 80 } | |
| 81 | |
| 82 protected: | |
| 83 const nsTArray<FrameChildList>& mLists; | |
| 84 uint32_t mCurrentIndex; | |
| 85 }; | |
| 86 | |
| 87 /** | |
| 88 * A class for retrieving a frame's child lists and iterate them. | |
| 89 */ | |
| 90 class MOZ_STACK_CLASS FrameChildListIterator | |
| 91 : public FrameChildListArrayIterator { | |
| 92 public: | |
| 93 FrameChildListIterator(const nsIFrame* aFrame); | |
| 94 | |
| 95 protected: | |
| 96 nsAutoTArray<FrameChildList,4> mLists; | |
| 97 }; | |
| 98 | |
| 99 inline mozilla::layout::FrameChildListIDs | |
| 100 operator|(mozilla::layout::FrameChildListID aLeftOp, | |
| 101 mozilla::layout::FrameChildListID aRightOp) | |
| 102 { | |
| 103 return mozilla::layout::FrameChildListIDs(aLeftOp) | | |
| 104 mozilla::layout::FrameChildListIDs(aRightOp); | |
| 105 } | |
| 106 | |
| 107 inline mozilla::layout::FrameChildListIDs | |
| 108 operator|(mozilla::layout::FrameChildListID aLeftOp, | |
| 109 mozilla::layout::FrameChildListIDs aRightOp) | |
| 110 { | |
| 111 return mozilla::layout::FrameChildListIDs(aLeftOp) | aRightOp; | |
| 112 } | |
| 113 | |
| 114 } // namespace layout | |
| 115 } // namespace mozilla | |
| 116 | |
| 117 inline void nsFrameList::AppendIfNonempty( | |
| 118 nsTArray<mozilla::layout::FrameChildList>* aLists, | |
| 119 mozilla::layout::FrameChildListID aListID) const | |
| 120 { | |
| 121 if (NotEmpty()) { | |
| 122 aLists->AppendElement(mozilla::layout::FrameChildList(*this, aListID)); | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 #endif /* !defined(FrameChildList_h_) */ |
