зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.9 KiB
C++
105 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef NSIFRAMETRAVERSAL_H
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#define NSIFRAMETRAVERSAL_H
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#include "nsISupports.h"
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#include "nsIFrame.h"
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#define NS_IFRAMEENUMERATOR_IID \
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{ 0x7c633f5d, 0x91eb, 0x494e, \
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{ 0xa1, 0x40, 0x17, 0x46, 0x17, 0x4c, 0x23, 0xd3 } }
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class nsIFrameEnumerator : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMEENUMERATOR_IID)
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virtual void First() = 0;
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virtual void Next() = 0;
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virtual nsIFrame* CurrentItem() = 0;
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virtual PRBool IsDone() = 0;
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virtual void Last() = 0;
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virtual void Prev() = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameEnumerator, NS_IFRAMEENUMERATOR_IID)
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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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// {9d469828-9bf2-4151-a385-05f30219221b}
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#define NS_IFRAMETRAVERSAL_IID \
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{ 0x9d469828, 0x9bf2, 0x4151, { 0xa3, 0x85, 0x05, 0xf3, 0x02, 0x19, 0x22, 0x1b } }
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class nsIFrameTraversal : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMETRAVERSAL_IID)
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/**
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* Create a frame iterator with the specified properties.
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* @param aEnumerator [out] the created iterator
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* @param aPresContext [in]
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* @param aStart [in] the frame to start iterating from
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* @param aType [in] the type of the iterator: leaf, pre-order, or post-order
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* @param aVisual [in] whether the iterator should traverse frames in visual
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* bidi order
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* @param aLockInScrollView [in] whether to stop iterating when exiting a
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* scroll view
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* @param aFollowOOFs [in] whether the iterator should follow out-of-flows.
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* If true, when reaching a placeholder frame while going down will get
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* the real frame. Going back up will go on past the placeholder,
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* so the placeholders are logically part of the frame tree.
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*/
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NS_IMETHOD NewFrameTraversal(nsIFrameEnumerator **aEnumerator,
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nsPresContext* aPresContext,
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nsIFrame *aStart,
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PRInt32 aType,
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PRBool aVisual,
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PRBool aLockInScrollView,
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PRBool aFollowOOFs) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameTraversal, NS_IFRAMETRAVERSAL_IID)
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#endif //NSIFRAMETRAVERSAL_H
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