layout/base/nsFrameManagerBase.h@b8a032363ba2 (annotated)
layout/base/nsFrameManagerBase.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim:cindent:ts=2:et:sw=2: |
| michael@0 | 3 | * |
| michael@0 | 4 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| michael@0 | 7 | * |
| michael@0 | 8 | * This Original Code has been modified by IBM Corporation. Modifications made |
| michael@0 | 9 | * by IBM described herein are Copyright (c) International Business Machines |
| michael@0 | 10 | * Corporation, 2000. Modifications to Mozilla code or documentation identified |
| michael@0 | 11 | * per MPL Section 3.3 |
| michael@0 | 12 | * |
| michael@0 | 13 | * Date Modified by Description of modification |
| michael@0 | 14 | * 04/20/2000 IBM Corp. OS/2 VisualAge build. |
| michael@0 | 15 | */ |
| michael@0 | 16 | |
| michael@0 | 17 | /* part of nsFrameManager, to work around header inclusionordering */ |
| michael@0 | 18 | |
| michael@0 | 19 | #ifndef _nsFrameManagerBase_h_ |
| michael@0 | 20 | #define _nsFrameManagerBase_h_ |
| michael@0 | 21 | |
| michael@0 | 22 | #include "pldhash.h" |
| michael@0 | 23 | |
| michael@0 | 24 | class nsIPresShell; |
| michael@0 | 25 | class nsStyleSet; |
| michael@0 | 26 | class nsIContent; |
| michael@0 | 27 | class nsPlaceholderFrame; |
| michael@0 | 28 | class nsIFrame; |
| michael@0 | 29 | class nsStyleContext; |
| michael@0 | 30 | class nsIAtom; |
| michael@0 | 31 | class nsStyleChangeList; |
| michael@0 | 32 | class nsILayoutHistoryState; |
| michael@0 | 33 | |
| michael@0 | 34 | class nsFrameManagerBase |
| michael@0 | 35 | { |
| michael@0 | 36 | public: |
| michael@0 | 37 | nsFrameManagerBase() |
| michael@0 | 38 | { |
| michael@0 | 39 | memset(this, '\0', sizeof(nsFrameManagerBase)); |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | bool IsDestroyingFrames() { return mIsDestroyingFrames; } |
| michael@0 | 43 | |
| michael@0 | 44 | /* |
| michael@0 | 45 | * Gets and sets the root frame (typically the viewport). The lifetime of the |
| michael@0 | 46 | * root frame is controlled by the frame manager. When the frame manager is |
| michael@0 | 47 | * destroyed, it destroys the entire frame hierarchy. |
| michael@0 | 48 | */ |
| michael@0 | 49 | NS_HIDDEN_(nsIFrame*) GetRootFrame() const { return mRootFrame; } |
| michael@0 | 50 | NS_HIDDEN_(void) SetRootFrame(nsIFrame* aRootFrame) |
| michael@0 | 51 | { |
| michael@0 | 52 | NS_ASSERTION(!mRootFrame, "already have a root frame"); |
| michael@0 | 53 | mRootFrame = aRootFrame; |
| michael@0 | 54 | } |
| michael@0 | 55 | |
| michael@0 | 56 | static uint32_t GetGlobalGenerationNumber() { return sGlobalGenerationNumber; } |
| michael@0 | 57 | |
| michael@0 | 58 | protected: |
| michael@0 | 59 | class UndisplayedMap; |
| michael@0 | 60 | |
| michael@0 | 61 | // weak link, because the pres shell owns us |
| michael@0 | 62 | nsIPresShell* mPresShell; |
| michael@0 | 63 | // the pres shell owns the style set |
| michael@0 | 64 | nsStyleSet* mStyleSet; |
| michael@0 | 65 | nsIFrame* mRootFrame; |
| michael@0 | 66 | PLDHashTable mPlaceholderMap; |
| michael@0 | 67 | UndisplayedMap* mUndisplayedMap; |
| michael@0 | 68 | bool mIsDestroyingFrames; // The frame manager is destroying some frame(s). |
| michael@0 | 69 | |
| michael@0 | 70 | // The frame tree generation number |
| michael@0 | 71 | // We use this to avoid unnecessary screenshotting |
| michael@0 | 72 | // on Android. Unfortunately, this is static to match |
| michael@0 | 73 | // the single consumer which is also static. Keeping |
| michael@0 | 74 | // this the same greatly simplifies lifetime issues and |
| michael@0 | 75 | // makes sure we always using the correct number. |
| michael@0 | 76 | // A per PresContext generation number is available |
| michael@0 | 77 | // via nsPresContext::GetDOMGeneration |
| michael@0 | 78 | static uint32_t sGlobalGenerationNumber; |
| michael@0 | 79 | }; |
| michael@0 | 80 | |
| michael@0 | 81 | #endif |
