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comparison: layout/base/nsIFrameTraversal.h
layout/base/nsIFrameTraversal.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 #ifndef NSIFRAMETRAVERSAL_H | |
| 6 #define NSIFRAMETRAVERSAL_H | |
| 7 | |
| 8 #include "nsISupports.h" | |
| 9 #include "nsIFrame.h" | |
| 10 | |
| 11 #define NS_IFRAMEENUMERATOR_IID \ | |
| 12 { 0x7c633f5d, 0x91eb, 0x494e, \ | |
| 13 { 0xa1, 0x40, 0x17, 0x46, 0x17, 0x4c, 0x23, 0xd3 } } | |
| 14 | |
| 15 class nsIFrameEnumerator : public nsISupports | |
| 16 { | |
| 17 public: | |
| 18 NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMEENUMERATOR_IID) | |
| 19 | |
| 20 virtual void First() = 0; | |
| 21 virtual void Next() = 0; | |
| 22 virtual nsIFrame* CurrentItem() = 0; | |
| 23 virtual bool IsDone() = 0; | |
| 24 | |
| 25 virtual void Last() = 0; | |
| 26 virtual void Prev() = 0; | |
| 27 }; | |
| 28 | |
| 29 NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameEnumerator, NS_IFRAMEENUMERATOR_IID) | |
| 30 | |
| 31 enum nsIteratorType { | |
| 32 eLeaf, | |
| 33 ePreOrder, | |
| 34 ePostOrder | |
| 35 }; | |
| 36 | |
| 37 // {9d469828-9bf2-4151-a385-05f30219221b} | |
| 38 #define NS_IFRAMETRAVERSAL_IID \ | |
| 39 { 0x9d469828, 0x9bf2, 0x4151, { 0xa3, 0x85, 0x05, 0xf3, 0x02, 0x19, 0x22, 0x1b } } | |
| 40 | |
| 41 class nsIFrameTraversal : public nsISupports | |
| 42 { | |
| 43 public: | |
| 44 NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMETRAVERSAL_IID) | |
| 45 | |
| 46 /** | |
| 47 * Create a frame iterator with the specified properties. | |
| 48 * @param aEnumerator [out] the created iterator | |
| 49 * @param aPresContext [in] | |
| 50 * @param aStart [in] the frame to start iterating from | |
| 51 * @param aType [in] the type of the iterator: leaf, pre-order, or post-order | |
| 52 * @param aVisual [in] whether the iterator should traverse frames in visual | |
| 53 * bidi order | |
| 54 * @param aLockInScrollView [in] whether to stop iterating when exiting a | |
| 55 * scroll view | |
| 56 * @param aFollowOOFs [in] whether the iterator should follow out-of-flows. | |
| 57 * If true, when reaching a placeholder frame while going down will get | |
| 58 * the real frame. Going back up will go on past the placeholder, | |
| 59 * so the placeholders are logically part of the frame tree. | |
| 60 */ | |
| 61 NS_IMETHOD NewFrameTraversal(nsIFrameEnumerator **aEnumerator, | |
| 62 nsPresContext* aPresContext, | |
| 63 nsIFrame *aStart, | |
| 64 int32_t aType, | |
| 65 bool aVisual, | |
| 66 bool aLockInScrollView, | |
| 67 bool aFollowOOFs) = 0; | |
| 68 }; | |
| 69 | |
| 70 NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameTraversal, NS_IFRAMETRAVERSAL_IID) | |
| 71 | |
| 72 #endif //NSIFRAMETRAVERSAL_H |
