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: #ifndef nsSprocketLayout_h___
michael@0: #define nsSprocketLayout_h___
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsBoxLayout.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsIFrame.h"
michael@0: 
michael@0: class nsBoxSize
michael@0: {
michael@0: public:
michael@0: 
michael@0:   nsBoxSize();
michael@0: 
michael@0:   nscoord pref;
michael@0:   nscoord min;
michael@0:   nscoord max;
michael@0:   nscoord flex;
michael@0:   nscoord left;
michael@0:   nscoord right;
michael@0:   bool    collapsed;
michael@0:   bool    bogus;
michael@0: 
michael@0:   nsBoxSize* next;
michael@0: 
michael@0:   void* operator new(size_t sz, nsBoxLayoutState& aState) CPP_THROW_NEW;
michael@0:   void operator delete(void* aPtr, size_t sz);
michael@0: };
michael@0: 
michael@0: class nsComputedBoxSize
michael@0: {
michael@0: public:
michael@0:   nsComputedBoxSize();
michael@0: 
michael@0:   nscoord size;
michael@0:   bool    valid;
michael@0:   bool    resized;
michael@0:   nsComputedBoxSize* next;
michael@0: 
michael@0:   void* operator new(size_t sz, nsBoxLayoutState& aState) CPP_THROW_NEW;
michael@0:   void operator delete(void* aPtr, size_t sz);
michael@0: };
michael@0: 
michael@0: #define GET_WIDTH(size, isHorizontal) (isHorizontal ? size.width : size.height)
michael@0: #define GET_HEIGHT(size, isHorizontal) (isHorizontal ? size.height : size.width)
michael@0: #define GET_X(size, isHorizontal) (isHorizontal ? size.x : size.y)
michael@0: #define GET_Y(size, isHorizontal) (isHorizontal ? size.y : size.x)
michael@0: #define GET_COORD(aX, aY, isHorizontal) (isHorizontal ? aX : aY)
michael@0: 
michael@0: #define SET_WIDTH(size, coord, isHorizontal)  if (isHorizontal) { (size).width  = (coord); } else { (size).height = (coord); }
michael@0: #define SET_HEIGHT(size, coord, isHorizontal) if (isHorizontal) { (size).height = (coord); } else { (size).width  = (coord); }
michael@0: #define SET_X(size, coord, isHorizontal) if (isHorizontal) { (size).x = (coord); } else { (size).y  = (coord); }
michael@0: #define SET_Y(size, coord, isHorizontal) if (isHorizontal) { (size).y = (coord); } else { (size).x  = (coord); }
michael@0: 
michael@0: #define SET_COORD(aX, aY, coord, isHorizontal) if (isHorizontal) { aX = (coord); } else { aY  = (coord); }
michael@0: 
michael@0: nsresult NS_NewSprocketLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);
michael@0: 
michael@0: class nsSprocketLayout : public nsBoxLayout {
michael@0: 
michael@0: public:
michael@0: 
michael@0:   friend nsresult NS_NewSprocketLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);
michael@0:   static void Shutdown();
michael@0: 
michael@0:   NS_IMETHOD Layout(nsIFrame* aBox, nsBoxLayoutState& aState) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsSize GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nsSize GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nsSize GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0:   virtual nscoord GetAscent(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsSprocketLayout();
michael@0: 
michael@0:   static bool IsHorizontal(nsIFrame* aBox);
michael@0: 
michael@0:   static void SetLargestSize(nsSize& aSize1, const nsSize& aSize2, bool aIsHorizontal);
michael@0:   static void SetSmallestSize(nsSize& aSize1, const nsSize& aSize2, bool aIsHorizontal);
michael@0: 
michael@0:   static void AddLargestSize(nsSize& aSize, const nsSize& aSizeToAdd, bool aIsHorizontal);
michael@0:   static void AddSmallestSize(nsSize& aSize, const nsSize& aSizeToAdd, bool aIsHorizontal);
michael@0:   static void AddCoord(nscoord& aCoord, nscoord aCoordToAdd);
michael@0: 
michael@0: protected:
michael@0: 
michael@0: 
michael@0:   void ComputeChildsNextPosition(nsIFrame* aBox,
michael@0:                                  const nscoord& aCurX, 
michael@0:                                  const nscoord& aCurY, 
michael@0:                                  nscoord& aNextX, 
michael@0:                                  nscoord& aNextY, 
michael@0:                                  const nsRect& aChildSize);
michael@0: 
michael@0:   void ChildResized(nsIFrame* aBox,
michael@0:                     nsBoxLayoutState& aState, 
michael@0:                     nsIFrame* aChild,
michael@0:                     nsBoxSize* aChildBoxSize, 
michael@0:                     nsComputedBoxSize* aChildComputedBoxSize, 
michael@0:                     nsBoxSize* aBoxSizes, 
michael@0:                     nsComputedBoxSize* aComputedBoxSizes, 
michael@0:                     const nsRect& aChildLayoutRect, 
michael@0:                     nsRect& aChildActualRect, 
michael@0:                     nsRect& aContainingRect, 
michael@0:                     int32_t aFlexes, 
michael@0:                     bool& aFinished);
michael@0: 
michael@0:   void AlignChildren(nsIFrame* aBox,
michael@0:                      nsBoxLayoutState& aState);
michael@0: 
michael@0:   virtual void ComputeChildSizes(nsIFrame* aBox, 
michael@0:                          nsBoxLayoutState& aState, 
michael@0:                          nscoord& aGivenSize, 
michael@0:                          nsBoxSize* aBoxSizes, 
michael@0:                          nsComputedBoxSize*& aComputedBoxSizes);
michael@0: 
michael@0: 
michael@0:   virtual void PopulateBoxSizes(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState,
michael@0:                                 nsBoxSize*& aBoxSizes, nscoord& aMinSize,
michael@0:                                 nscoord& aMaxSize, int32_t& aFlexes);
michael@0: 
michael@0:   virtual void InvalidateComputedSizes(nsComputedBoxSize* aComputedBoxSizes);
michael@0: 
michael@0:   virtual bool GetDefaultFlex(int32_t& aFlex);
michael@0: 
michael@0:   virtual void GetFrameState(nsIFrame* aBox, nsFrameState& aState);
michael@0: 
michael@0: private:
michael@0: 
michael@0: 
michael@0:   // because the sprocket layout manager has no instance variables. We 
michael@0:   // can make a static one and reuse it everywhere.
michael@0:   static nsBoxLayout* gInstance;
michael@0: 
michael@0: };
michael@0: 
michael@0: #endif
michael@0: