Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : /**
       7             : 
       8             :   Author:
       9             :   Eric D Vaughan
      10             : 
      11             : **/
      12             : 
      13             : #ifndef nsBoxLayoutState_h___
      14             : #define nsBoxLayoutState_h___
      15             : 
      16             : #include "nsCOMPtr.h"
      17             : #include "nsPresContext.h"
      18             : #include "nsIPresShell.h"
      19             : 
      20             : class gfxContext;
      21             : namespace mozilla {
      22             : struct ReflowInput;
      23             : } // namespace mozilla
      24             : 
      25             : 
      26        1787 : class MOZ_STACK_CLASS nsBoxLayoutState
      27             : {
      28             :   using ReflowInput = mozilla::ReflowInput;
      29             : 
      30             : public:
      31             :   explicit nsBoxLayoutState(nsPresContext* aPresContext,
      32             :                             gfxContext* aRenderingContext = nullptr,
      33             :                             // see OuterReflowInput() below
      34             :                             const ReflowInput* aOuterReflowInput = nullptr,
      35             :                             uint16_t aReflowDepth = 0);
      36             :   nsBoxLayoutState(const nsBoxLayoutState& aState);
      37             : 
      38        1543 :   nsPresContext* PresContext() const { return mPresContext; }
      39           0 :   nsIPresShell* PresShell() const { return mPresContext->PresShell(); }
      40             : 
      41        3732 :   uint32_t LayoutFlags() const { return mLayoutFlags; }
      42        1362 :   void SetLayoutFlags(uint32_t aFlags) { mLayoutFlags = aFlags; }
      43             : 
      44             :   // if true no one under us will paint during reflow.
      45           0 :   void SetPaintingDisabled(bool aDisable) { mPaintingDisabled = aDisable; }
      46         437 :   bool PaintingDisabled() const { return mPaintingDisabled; }
      47             : 
      48             :   // The rendering context may be null for specialized uses of
      49             :   // nsBoxLayoutState and should be null-checked before it is used.
      50             :   // However, passing a null rendering context to the constructor when
      51             :   // doing box layout or intrinsic size calculation will cause bugs.
      52        8490 :   gfxContext* GetRenderingContext() const { return mRenderingContext; }
      53             : 
      54             :   struct AutoReflowDepth {
      55         438 :     explicit AutoReflowDepth(nsBoxLayoutState& aState)
      56         438 :       : mState(aState) { ++mState.mReflowDepth; }
      57         438 :     ~AutoReflowDepth() { --mState.mReflowDepth; }
      58             :     nsBoxLayoutState& mState;
      59             :   };
      60             : 
      61             :   // The HTML reflow state that lives outside the box-block boundary.
      62             :   // May not be set reliably yet.
      63         378 :   const ReflowInput* OuterReflowInput() { return mOuterReflowInput; }
      64             : 
      65         126 :   uint16_t GetReflowDepth() { return mReflowDepth; }
      66             : 
      67             : private:
      68             :   RefPtr<nsPresContext> mPresContext;
      69             :   gfxContext *mRenderingContext;
      70             :   const ReflowInput *mOuterReflowInput;
      71             :   uint32_t mLayoutFlags;
      72             :   uint16_t mReflowDepth;
      73             :   bool mPaintingDisabled;
      74             : };
      75             : 
      76             : #endif
      77             :