1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/nsBoxLayoutState.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,76 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/**
1.10 +
1.11 + Author:
1.12 + Eric D Vaughan
1.13 +
1.14 +**/
1.15 +
1.16 +#ifndef nsBoxLayoutState_h___
1.17 +#define nsBoxLayoutState_h___
1.18 +
1.19 +#include "nsCOMPtr.h"
1.20 +#include "nsPresContext.h"
1.21 +#include "nsIPresShell.h"
1.22 +
1.23 +class nsRenderingContext;
1.24 +class nsCalculatedBoxInfo;
1.25 +struct nsHTMLReflowMetrics;
1.26 +struct nsHTMLReflowState;
1.27 +class nsString;
1.28 +class nsHTMLReflowCommand;
1.29 +
1.30 +class MOZ_STACK_CLASS nsBoxLayoutState
1.31 +{
1.32 +public:
1.33 + nsBoxLayoutState(nsPresContext* aPresContext,
1.34 + nsRenderingContext* aRenderingContext = nullptr,
1.35 + // see OuterReflowState() below
1.36 + const nsHTMLReflowState* aOuterReflowState = nullptr,
1.37 + uint16_t aReflowDepth = 0) NS_HIDDEN;
1.38 + nsBoxLayoutState(const nsBoxLayoutState& aState) NS_HIDDEN;
1.39 +
1.40 + nsPresContext* PresContext() const { return mPresContext; }
1.41 + nsIPresShell* PresShell() const { return mPresContext->PresShell(); }
1.42 +
1.43 + uint32_t LayoutFlags() const { return mLayoutFlags; }
1.44 + void SetLayoutFlags(uint32_t aFlags) { mLayoutFlags = aFlags; }
1.45 +
1.46 + // if true no one under us will paint during reflow.
1.47 + void SetPaintingDisabled(bool aDisable) { mPaintingDisabled = aDisable; }
1.48 + bool PaintingDisabled() const { return mPaintingDisabled; }
1.49 +
1.50 + // The rendering context may be null for specialized uses of
1.51 + // nsBoxLayoutState and should be null-checked before it is used.
1.52 + // However, passing a null rendering context to the constructor when
1.53 + // doing box layout or intrinsic size calculation will cause bugs.
1.54 + nsRenderingContext* GetRenderingContext() const { return mRenderingContext; }
1.55 +
1.56 + struct AutoReflowDepth {
1.57 + AutoReflowDepth(nsBoxLayoutState& aState)
1.58 + : mState(aState) { ++mState.mReflowDepth; }
1.59 + ~AutoReflowDepth() { --mState.mReflowDepth; }
1.60 + nsBoxLayoutState& mState;
1.61 + };
1.62 +
1.63 + // The HTML reflow state that lives outside the box-block boundary.
1.64 + // May not be set reliably yet.
1.65 + const nsHTMLReflowState* OuterReflowState() { return mOuterReflowState; }
1.66 +
1.67 + uint16_t GetReflowDepth() { return mReflowDepth; }
1.68 +
1.69 +private:
1.70 + nsRefPtr<nsPresContext> mPresContext;
1.71 + nsRenderingContext *mRenderingContext;
1.72 + const nsHTMLReflowState *mOuterReflowState;
1.73 + uint32_t mLayoutFlags;
1.74 + uint16_t mReflowDepth;
1.75 + bool mPaintingDisabled;
1.76 +};
1.77 +
1.78 +#endif
1.79 +
