mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 NSFRAMEITERATOR_H
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#define NSFRAMEITERATOR_H
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#include "prtypes.h"
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class nsPresContext;
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class nsIFrame;
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enum nsIteratorType {
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eLeaf,
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ePreOrder,
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ePostOrder
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};
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class nsFrameIterator
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{
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public:
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nsFrameIterator(nsPresContext* aPresContext, nsIFrame *aStart,
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nsIteratorType aType, PRUint32 aFlags);
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~nsFrameIterator() {}
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void First();
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void Next();
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nsIFrame* CurrentItem();
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bool IsDone();
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void Last();
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void Prev();
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enum FrameIteratorFlags {
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FLAG_NONE = 0,
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FLAG_LOCK_SCROLL = 1 << 1,
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FLAG_FOLLOW_OUT_OF_FLOW = 1 << 2,
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FLAG_VISUAL = 1 << 3
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};
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protected:
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void setCurrent(nsIFrame *aFrame){mCurrent = aFrame;}
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nsIFrame *getCurrent(){return mCurrent;}
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void setStart(nsIFrame *aFrame){mStart = aFrame;}
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nsIFrame *getStart(){return mStart;}
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nsIFrame *getLast(){return mLast;}
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void setLast(nsIFrame *aFrame){mLast = aFrame;}
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PRInt8 getOffEdge(){return mOffEdge;}
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void setOffEdge(PRInt8 aOffEdge){mOffEdge = aOffEdge;}
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void SetLockInScrollView(bool aLockScroll){mLockScroll = aLockScroll;}
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/*
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Our own versions of the standard frame tree navigation
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methods, which, if the iterator is following out-of-flows,
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apply the following rules for placeholder frames:
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- If a frame HAS a placeholder frame, getting its parent
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gets the placeholder's parent.
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- If a frame's first child or next/prev sibling IS a
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placeholder frame, then we instead return the real frame.
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- If a frame HAS a placeholder frame, getting its next/prev
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sibling gets the placeholder frame's next/prev sibling.
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These are all applied recursively to support multiple levels of
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placeholders.
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*/
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nsIFrame* GetParentFrame(nsIFrame* aFrame);
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// like GetParentFrame but returns null once a popup frame is reached
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nsIFrame* GetParentFrameNotPopup(nsIFrame* aFrame);
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nsIFrame* GetFirstChild(nsIFrame* aFrame);
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nsIFrame* GetLastChild(nsIFrame* aFrame);
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nsIFrame* GetNextSibling(nsIFrame* aFrame);
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nsIFrame* GetPrevSibling(nsIFrame* aFrame);
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/*
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These methods are different in visual mode to have the
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semantics of "get first child in visual order", "get last child in visual
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order", "get next sibling in visual order" and "get previous sibling in visual
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order".
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*/
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nsIFrame* GetFirstChildInner(nsIFrame* aFrame);
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nsIFrame* GetLastChildInner(nsIFrame* aFrame);
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nsIFrame* GetNextSiblingInner(nsIFrame* aFrame);
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nsIFrame* GetPrevSiblingInner(nsIFrame* aFrame);
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nsIFrame* GetPlaceholderFrame(nsIFrame* aFrame);
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bool IsPopupFrame(nsIFrame* aFrame);
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nsPresContext* mPresContext;
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nsIFrame *mStart;
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nsIFrame *mCurrent;
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nsIFrame *mLast; //the last one that was in current;
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PRInt8 mOffEdge; //0= no -1 to far prev, 1 to far next;
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nsIteratorType mType;
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bool mLockScroll;
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bool mFollowOOFs;
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bool mVisual;
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};
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#endif //NSFRAMEITERATOR_H
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