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https://github.com/mozilla/gecko-dev.git
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85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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class nsIFrame;
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#define NS_IFRAMEENUMERATOR_IID \
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{ \
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0x7c633f5d, 0x91eb, 0x494e, { \
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0xa1, 0x40, 0x17, 0x46, 0x17, 0x4c, 0x23, 0xd3 \
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} \
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}
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class nsIFrameEnumerator : public nsISupports {
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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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inline nsIFrame* Traverse(bool aForward) {
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if (aForward) {
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Next();
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} else {
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Prev();
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}
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return CurrentItem();
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};
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameEnumerator, NS_IFRAMEENUMERATOR_IID)
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enum nsIteratorType { eLeaf, ePreOrder, ePostOrder };
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// {d33fe76c-207c-4359-a315-8eb1eecf80e5}
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#define NS_IFRAMETRAVERSAL_IID \
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{ \
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0xd33fe76c, 0x207c, 0x4359, { \
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0xa3, 0x15, 0x8e, 0xb1, 0xee, 0xcf, 0x80, 0xe5 \
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} \
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}
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class nsIFrameTraversal : public nsISupports {
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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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* @param aSkipPopupChecks [in] if false, then don't iterate into or out of a
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* popup frame. If true, skip any popup related checks.
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*/
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NS_IMETHOD NewFrameTraversal(nsIFrameEnumerator** aEnumerator,
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nsPresContext* aPresContext, nsIFrame* aStart,
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int32_t aType, bool aVisual,
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bool aLockInScrollView, bool aFollowOOFs,
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bool aSkipPopupChecks) = 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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