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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef NSIFRAMETRAVERSAL_H
#define NSIFRAMETRAVERSAL_H
#include "nsISupports.h"
class nsIFrame;
class nsPresContext;
#define NS_IFRAMEENUMERATOR_IID \
{ \
0x7c633f5d, 0x91eb, 0x494e, { \
0xa1, 0x40, 0x17, 0x46, 0x17, 0x4c, 0x23, 0xd3 \
} \
}
class nsIFrameEnumerator : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMEENUMERATOR_IID)
virtual void First() = 0;
virtual void Next() = 0;
virtual nsIFrame* CurrentItem() = 0;
virtual bool IsDone() = 0;
virtual void Last() = 0;
virtual void Prev() = 0;
inline nsIFrame* Traverse(bool aForward) {
if (aForward) {
Next();
} else {
Prev();
}
return CurrentItem();
};
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameEnumerator, NS_IFRAMEENUMERATOR_IID)
enum nsIteratorType { eLeaf, ePreOrder, ePostOrder };
// {d33fe76c-207c-4359-a315-8eb1eecf80e5}
#define NS_IFRAMETRAVERSAL_IID \
{ \
0xd33fe76c, 0x207c, 0x4359, { \
0xa3, 0x15, 0x8e, 0xb1, 0xee, 0xcf, 0x80, 0xe5 \
} \
}
class nsIFrameTraversal : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMETRAVERSAL_IID)
/**
* Create a frame iterator with the specified properties.
* @param aEnumerator [out] the created iterator
* @param aPresContext [in]
* @param aStart [in] the frame to start iterating from
* @param aType [in] the type of the iterator: leaf, pre-order, or post-order
* @param aVisual [in] whether the iterator should traverse frames in visual
* bidi order
* @param aLockInScrollView [in] whether to stop iterating when exiting a
* scroll view
* @param aFollowOOFs [in] whether the iterator should follow out-of-flows.
* If true, when reaching a placeholder frame while going down will get
* the real frame. Going back up will go on past the placeholder,
* so the placeholders are logically part of the frame tree.
* @param aSkipPopupChecks [in] if false, then don't iterate into or out of a
* popup frame. If true, skip any popup related checks.
*/
NS_IMETHOD NewFrameTraversal(nsIFrameEnumerator** aEnumerator,
nsPresContext* aPresContext, nsIFrame* aStart,
int32_t aType, bool aVisual,
bool aLockInScrollView, bool aFollowOOFs,
bool aSkipPopupChecks) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameTraversal, NS_IFRAMETRAVERSAL_IID)
#endif // NSIFRAMETRAVERSAL_H
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