зеркало из https://github.com/mozilla/pjs.git
136 строки
3.9 KiB
C++
136 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsFrameList_h___
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#define nsFrameList_h___
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#include "nsIFrame.h"
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/**
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* A class for managing a singly linked list of frames. Frames are
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* linked together through their next-sibling pointer.
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*/
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class nsFrameList {
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public:
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nsFrameList() {
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mFirstChild = nsnull;
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}
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nsFrameList(nsIFrame* aHead) {
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mFirstChild = aHead;
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}
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~nsFrameList() {
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}
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void DestroyFrames(nsIPresContext* aPresContext);
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void SetFrames(nsIFrame* aFrameList) {
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mFirstChild = aFrameList;
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}
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void AppendFrames(nsIFrame* aParent, nsIFrame* aFrameList);
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void AppendFrames(nsIFrame* aParent, nsFrameList& aFrameList) {
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AppendFrames(aParent, aFrameList.mFirstChild);
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aFrameList.mFirstChild = nsnull;
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}
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void AppendFrame(nsIFrame* aParent, nsIFrame* aFrame);
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// Take aFrame out of the frame list. This also disconnects aFrame
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// from the sibling list. This will return PR_FALSE if aFrame is
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// nsnull or if aFrame is not in the list.
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PRBool RemoveFrame(nsIFrame* aFrame);
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// Remove the first child from the list. The caller is assumed to be
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// holding a reference to the first child. This call is equivalent
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// in behavior to calling RemoveFrame(FirstChild()).
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PRBool RemoveFirstChild();
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// Take aFrame out of the frame list and then destroy it. This also
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// disconnects aFrame from the sibling list. This will return
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// PR_FALSE if aFrame is nsnull or if aFrame is not in the list.
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PRBool DestroyFrame(nsIPresContext* aPresContext, nsIFrame* aFrame);
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void InsertFrame(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aNewFrame);
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void InsertFrames(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aFrameList);
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void InsertFrames(nsIFrame* aParent, nsIFrame* aPrevSibling,
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nsFrameList& aFrameList) {
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InsertFrames(aParent, aPrevSibling, aFrameList.FirstChild());
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aFrameList.mFirstChild = nsnull;
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}
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PRBool ReplaceFrame(nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame);
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PRBool ReplaceAndDestroyFrame(nsIPresContext* aPresContext,
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nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame);
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PRBool Split(nsIFrame* aAfterFrame, nsIFrame** aNextFrameResult);
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nsIFrame* PullFrame(nsIFrame* aParent,
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nsIFrame* aLastChild,
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nsFrameList& aFromList);
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nsIFrame* FirstChild() const {
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return mFirstChild;
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}
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nsIFrame* LastChild() const;
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nsIFrame* FrameAt(PRInt32 aIndex) const;
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PRBool IsEmpty() const {
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return nsnull == mFirstChild;
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}
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PRBool NotEmpty() const {
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return nsnull != mFirstChild;
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}
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PRBool ContainsFrame(const nsIFrame* aFrame) const;
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PRInt32 GetLength() const;
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nsIFrame* GetPrevSiblingFor(nsIFrame* aFrame) const;
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void VerifyParent(nsIFrame* aParent) const;
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#ifdef NS_DEBUG
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void List(nsIPresContext* aPresContext, FILE* out) const;
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#endif
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protected:
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nsIFrame* mFirstChild;
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};
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#endif /* nsFrameList_h___ */
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