1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsFrameManagerBase.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,81 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * vim:cindent:ts=2:et:sw=2:
1.6 + *
1.7 + * This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.10 + *
1.11 + * This Original Code has been modified by IBM Corporation. Modifications made
1.12 + * by IBM described herein are Copyright (c) International Business Machines
1.13 + * Corporation, 2000. Modifications to Mozilla code or documentation identified
1.14 + * per MPL Section 3.3
1.15 + *
1.16 + * Date Modified by Description of modification
1.17 + * 04/20/2000 IBM Corp. OS/2 VisualAge build.
1.18 + */
1.19 +
1.20 +/* part of nsFrameManager, to work around header inclusionordering */
1.21 +
1.22 +#ifndef _nsFrameManagerBase_h_
1.23 +#define _nsFrameManagerBase_h_
1.24 +
1.25 +#include "pldhash.h"
1.26 +
1.27 +class nsIPresShell;
1.28 +class nsStyleSet;
1.29 +class nsIContent;
1.30 +class nsPlaceholderFrame;
1.31 +class nsIFrame;
1.32 +class nsStyleContext;
1.33 +class nsIAtom;
1.34 +class nsStyleChangeList;
1.35 +class nsILayoutHistoryState;
1.36 +
1.37 +class nsFrameManagerBase
1.38 +{
1.39 +public:
1.40 + nsFrameManagerBase()
1.41 + {
1.42 + memset(this, '\0', sizeof(nsFrameManagerBase));
1.43 + }
1.44 +
1.45 + bool IsDestroyingFrames() { return mIsDestroyingFrames; }
1.46 +
1.47 + /*
1.48 + * Gets and sets the root frame (typically the viewport). The lifetime of the
1.49 + * root frame is controlled by the frame manager. When the frame manager is
1.50 + * destroyed, it destroys the entire frame hierarchy.
1.51 + */
1.52 + NS_HIDDEN_(nsIFrame*) GetRootFrame() const { return mRootFrame; }
1.53 + NS_HIDDEN_(void) SetRootFrame(nsIFrame* aRootFrame)
1.54 + {
1.55 + NS_ASSERTION(!mRootFrame, "already have a root frame");
1.56 + mRootFrame = aRootFrame;
1.57 + }
1.58 +
1.59 + static uint32_t GetGlobalGenerationNumber() { return sGlobalGenerationNumber; }
1.60 +
1.61 +protected:
1.62 + class UndisplayedMap;
1.63 +
1.64 + // weak link, because the pres shell owns us
1.65 + nsIPresShell* mPresShell;
1.66 + // the pres shell owns the style set
1.67 + nsStyleSet* mStyleSet;
1.68 + nsIFrame* mRootFrame;
1.69 + PLDHashTable mPlaceholderMap;
1.70 + UndisplayedMap* mUndisplayedMap;
1.71 + bool mIsDestroyingFrames; // The frame manager is destroying some frame(s).
1.72 +
1.73 + // The frame tree generation number
1.74 + // We use this to avoid unnecessary screenshotting
1.75 + // on Android. Unfortunately, this is static to match
1.76 + // the single consumer which is also static. Keeping
1.77 + // this the same greatly simplifies lifetime issues and
1.78 + // makes sure we always using the correct number.
1.79 + // A per PresContext generation number is available
1.80 + // via nsPresContext::GetDOMGeneration
1.81 + static uint32_t sGlobalGenerationNumber;
1.82 +};
1.83 +
1.84 +#endif
