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