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