зеркало из https://github.com/mozilla/gecko-dev.git
73 строки
2.4 KiB
C++
73 строки
2.4 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 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 bool 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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int32_t aType,
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bool aVisual,
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bool aLockInScrollView,
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bool 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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