The Tor Browser / file comparison
comparison: layout/base/nsFrameManager.h
layout/base/nsFrameManager.h
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:c893854fc75b |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim:cindent:ts=2:et:sw=2: | |
| 3 * | |
| 4 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 7 * | |
| 8 * This Original Code has been modified by IBM Corporation. Modifications made | |
| 9 * by IBM described herein are Copyright (c) International Business Machines | |
| 10 * Corporation, 2000. Modifications to Mozilla code or documentation identified | |
| 11 * per MPL Section 3.3 | |
| 12 * | |
| 13 * Date Modified by Description of modification | |
| 14 * 04/20/2000 IBM Corp. OS/2 VisualAge build. | |
| 15 */ | |
| 16 | |
| 17 /* storage of the frame tree and information about it */ | |
| 18 | |
| 19 #ifndef _nsFrameManager_h_ | |
| 20 #define _nsFrameManager_h_ | |
| 21 | |
| 22 #include "nsIFrame.h" | |
| 23 #include "nsFrameManagerBase.h" | |
| 24 #include "nsIContent.h" | |
| 25 | |
| 26 namespace mozilla { | |
| 27 /** | |
| 28 * Node in a linked list, containing the style for an element that | |
| 29 * does not have a frame but whose parent does have a frame. | |
| 30 */ | |
| 31 struct UndisplayedNode { | |
| 32 UndisplayedNode(nsIContent* aContent, nsStyleContext* aStyle) | |
| 33 : mContent(aContent), | |
| 34 mStyle(aStyle), | |
| 35 mNext(nullptr) | |
| 36 { | |
| 37 MOZ_COUNT_CTOR(mozilla::UndisplayedNode); | |
| 38 } | |
| 39 | |
| 40 NS_HIDDEN ~UndisplayedNode() | |
| 41 { | |
| 42 MOZ_COUNT_DTOR(mozilla::UndisplayedNode); | |
| 43 | |
| 44 // Delete mNext iteratively to avoid blowing up the stack (bug 460461). | |
| 45 UndisplayedNode* cur = mNext; | |
| 46 while (cur) { | |
| 47 UndisplayedNode* next = cur->mNext; | |
| 48 cur->mNext = nullptr; | |
| 49 delete cur; | |
| 50 cur = next; | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 nsCOMPtr<nsIContent> mContent; | |
| 55 nsRefPtr<nsStyleContext> mStyle; | |
| 56 UndisplayedNode* mNext; | |
| 57 }; | |
| 58 | |
| 59 } // namespace mozilla | |
| 60 | |
| 61 /** | |
| 62 * Frame manager interface. The frame manager serves two purposes: | |
| 63 * <li>provides a service for mapping from content to frame and from | |
| 64 * out-of-flow frame to placeholder frame. | |
| 65 * <li>handles structural modifications to the frame model. If the frame model | |
| 66 * lock can be acquired, then the changes are processed immediately; otherwise, | |
| 67 * they're queued and processed later. | |
| 68 * | |
| 69 * Do not add virtual methods to this class, or bryner will punish you. | |
| 70 */ | |
| 71 | |
| 72 class nsFrameManager : public nsFrameManagerBase | |
| 73 { | |
| 74 typedef nsIFrame::ChildListID ChildListID; | |
| 75 | |
| 76 public: | |
| 77 nsFrameManager(nsIPresShell *aPresShell, nsStyleSet* aStyleSet) NS_HIDDEN { | |
| 78 mPresShell = aPresShell; | |
| 79 mStyleSet = aStyleSet; | |
| 80 MOZ_ASSERT(mPresShell, "need a pres shell"); | |
| 81 MOZ_ASSERT(mStyleSet, "need a style set"); | |
| 82 } | |
| 83 ~nsFrameManager() NS_HIDDEN; | |
| 84 | |
| 85 /* | |
| 86 * After Destroy is called, it is an error to call any FrameManager methods. | |
| 87 * Destroy should be called when the frame tree managed by the frame | |
| 88 * manager is no longer being displayed. | |
| 89 */ | |
| 90 NS_HIDDEN_(void) Destroy(); | |
| 91 | |
| 92 // Placeholder frame functions | |
| 93 NS_HIDDEN_(nsPlaceholderFrame*) GetPlaceholderFrameFor(const nsIFrame* aFrame); | |
| 94 NS_HIDDEN_(nsresult) | |
| 95 RegisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame); | |
| 96 | |
| 97 NS_HIDDEN_(void) | |
| 98 UnregisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame); | |
| 99 | |
| 100 NS_HIDDEN_(void) ClearPlaceholderFrameMap(); | |
| 101 | |
| 102 // Mapping undisplayed content | |
| 103 NS_HIDDEN_(nsStyleContext*) GetUndisplayedContent(nsIContent* aContent); | |
| 104 NS_HIDDEN_(mozilla::UndisplayedNode*) | |
| 105 GetAllUndisplayedContentIn(nsIContent* aParentContent); | |
| 106 NS_HIDDEN_(void) SetUndisplayedContent(nsIContent* aContent, | |
| 107 nsStyleContext* aStyleContext); | |
| 108 NS_HIDDEN_(void) ChangeUndisplayedContent(nsIContent* aContent, | |
| 109 nsStyleContext* aStyleContext); | |
| 110 NS_HIDDEN_(void) ClearUndisplayedContentIn(nsIContent* aContent, | |
| 111 nsIContent* aParentContent); | |
| 112 NS_HIDDEN_(void) ClearAllUndisplayedContentIn(nsIContent* aParentContent); | |
| 113 | |
| 114 // Functions for manipulating the frame model | |
| 115 NS_HIDDEN_(nsresult) AppendFrames(nsIFrame* aParentFrame, | |
| 116 ChildListID aListID, | |
| 117 nsFrameList& aFrameList); | |
| 118 | |
| 119 NS_HIDDEN_(nsresult) InsertFrames(nsIFrame* aParentFrame, | |
| 120 ChildListID aListID, | |
| 121 nsIFrame* aPrevFrame, | |
| 122 nsFrameList& aFrameList); | |
| 123 | |
| 124 NS_HIDDEN_(nsresult) RemoveFrame(ChildListID aListID, | |
| 125 nsIFrame* aOldFrame); | |
| 126 | |
| 127 /* | |
| 128 * Notification that a frame is about to be destroyed. This allows any | |
| 129 * outstanding references to the frame to be cleaned up. | |
| 130 */ | |
| 131 NS_HIDDEN_(void) NotifyDestroyingFrame(nsIFrame* aFrame); | |
| 132 | |
| 133 /* | |
| 134 * Capture/restore frame state for the frame subtree rooted at aFrame. | |
| 135 * aState is the document state storage object onto which each frame | |
| 136 * stores its state. Callers of CaptureFrameState are responsible for | |
| 137 * traversing next continuations of special siblings of aFrame as | |
| 138 * needed; this method will only work with actual frametree descendants | |
| 139 * of aFrame. | |
| 140 */ | |
| 141 | |
| 142 NS_HIDDEN_(void) CaptureFrameState(nsIFrame* aFrame, | |
| 143 nsILayoutHistoryState* aState); | |
| 144 | |
| 145 NS_HIDDEN_(void) RestoreFrameState(nsIFrame* aFrame, | |
| 146 nsILayoutHistoryState* aState); | |
| 147 | |
| 148 /* | |
| 149 * Add/restore state for one frame | |
| 150 */ | |
| 151 NS_HIDDEN_(void) CaptureFrameStateFor(nsIFrame* aFrame, | |
| 152 nsILayoutHistoryState* aState); | |
| 153 | |
| 154 NS_HIDDEN_(void) RestoreFrameStateFor(nsIFrame* aFrame, | |
| 155 nsILayoutHistoryState* aState); | |
| 156 | |
| 157 NS_HIDDEN_(nsIPresShell*) GetPresShell() const { return mPresShell; } | |
| 158 NS_HIDDEN_(nsPresContext*) GetPresContext() const { | |
| 159 return mPresShell->GetPresContext(); | |
| 160 } | |
| 161 }; | |
| 162 | |
| 163 #endif |
