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96 lines
3.3 KiB
C++
96 lines
3.3 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 "nsIEnumerator.h"
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#include "nsIFrame.h"
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/* Brief explanation of frame traversal types:
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*
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* LEAF:
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* Iterate over only the leaf frames in the tree, in depth-first order.
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*
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* EXTENSIVE:
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* Iterate over all frames in the tree, including non-leaf frames.
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* Child frames are traversed before their parents going both forward
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* and backward.
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*
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* FOCUS:
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* Traverse frames in "focus" order, which is like extensive but
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* does a strict preorder traversal in both directions. This type of
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* traversal also handles placeholder frames transparently, meaning that
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* it will never stop on one - going down will get the real frame, going
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* back up will go on past the placeholder, so the placeholders are logically
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* part of the frame tree.
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*
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* FASTEST:
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* XXX not implemented
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*
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* VISUAL:
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* Traverse frames in "visual" order (left-to-right, top-to-bottom).
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*/
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enum nsTraversalType{
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LEAF,
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EXTENSIVE,
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FOCUS,
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FASTEST
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#ifdef IBMBIDI // Simon
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, VISUAL
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#endif
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};
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// {1691E1F3-EE41-11d4-9885-00C04FA0CF4B}
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#define NS_IFRAMETRAVERSAL_IID \
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{ 0x1691e1f3, 0xee41, 0x11d4, { 0x98, 0x85, 0x0, 0xc0, 0x4f, 0xa0, 0xcf, 0x4b } }
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class nsIFrameTraversal : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IFRAMETRAVERSAL_IID)
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NS_IMETHOD NewFrameTraversal(nsIBidirectionalEnumerator **aEnumerator,
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PRUint32 aType,
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nsPresContext* aPresContext,
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nsIFrame *aStart) = 0;
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};
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#endif //NSIFRAMETRAVERSAL_H
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