зеркало из https://github.com/mozilla/gecko-dev.git
73 строки
2.4 KiB
C++
73 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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Author:
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Eric D Vaughan
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**/
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#ifndef nsBoxLayoutState_h___
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#define nsBoxLayoutState_h___
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#include "nsCOMPtr.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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class nsRenderingContext;
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struct nsHTMLReflowState;
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class MOZ_STACK_CLASS nsBoxLayoutState
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{
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public:
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explicit nsBoxLayoutState(nsPresContext* aPresContext,
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nsRenderingContext* aRenderingContext = nullptr,
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// see OuterReflowState() below
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const nsHTMLReflowState* aOuterReflowState = nullptr,
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uint16_t aReflowDepth = 0);
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nsBoxLayoutState(const nsBoxLayoutState& aState);
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nsPresContext* PresContext() const { return mPresContext; }
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nsIPresShell* PresShell() const { return mPresContext->PresShell(); }
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uint32_t LayoutFlags() const { return mLayoutFlags; }
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void SetLayoutFlags(uint32_t aFlags) { mLayoutFlags = aFlags; }
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// if true no one under us will paint during reflow.
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void SetPaintingDisabled(bool aDisable) { mPaintingDisabled = aDisable; }
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bool PaintingDisabled() const { return mPaintingDisabled; }
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// The rendering context may be null for specialized uses of
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// nsBoxLayoutState and should be null-checked before it is used.
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// However, passing a null rendering context to the constructor when
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// doing box layout or intrinsic size calculation will cause bugs.
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nsRenderingContext* GetRenderingContext() const { return mRenderingContext; }
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struct AutoReflowDepth {
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explicit AutoReflowDepth(nsBoxLayoutState& aState)
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: mState(aState) { ++mState.mReflowDepth; }
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~AutoReflowDepth() { --mState.mReflowDepth; }
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nsBoxLayoutState& mState;
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};
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// The HTML reflow state that lives outside the box-block boundary.
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// May not be set reliably yet.
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const nsHTMLReflowState* OuterReflowState() { return mOuterReflowState; }
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uint16_t GetReflowDepth() { return mReflowDepth; }
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private:
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RefPtr<nsPresContext> mPresContext;
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nsRenderingContext *mRenderingContext;
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const nsHTMLReflowState *mOuterReflowState;
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uint32_t mLayoutFlags;
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uint16_t mReflowDepth;
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bool mPaintingDisabled;
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};
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#endif
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