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layout/generic/FrameChildList.h@b8a032363ba2 (annotated)

layout/generic/FrameChildList.h

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

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