The Tor Browser: layout/xul/nsSprocketLayout.h@7e26c7da4463

     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/. */

     6 #ifndef nsSprocketLayout_h___

     7 #define nsSprocketLayout_h___

     9 #include "mozilla/Attributes.h"

    10 #include "nsBoxLayout.h"

    11 #include "nsCOMPtr.h"

    12 #include "nsIFrame.h"

    14 class nsBoxSize

    15 {

    16 public:

    18   nsBoxSize();

    20   nscoord pref;

    21   nscoord min;

    22   nscoord max;

    23   nscoord flex;

    24   nscoord left;

    25   nscoord right;

    26   bool    collapsed;

    27   bool    bogus;

    29   nsBoxSize* next;

    31   void* operator new(size_t sz, nsBoxLayoutState& aState) CPP_THROW_NEW;

    32   void operator delete(void* aPtr, size_t sz);

    33 };

    35 class nsComputedBoxSize

    36 {

    37 public:

    38   nsComputedBoxSize();

    40   nscoord size;

    41   bool    valid;

    42   bool    resized;

    43   nsComputedBoxSize* next;

    45   void* operator new(size_t sz, nsBoxLayoutState& aState) CPP_THROW_NEW;

    46   void operator delete(void* aPtr, size_t sz);

    47 };

    49 #define GET_WIDTH(size, isHorizontal) (isHorizontal ? size.width : size.height)

    50 #define GET_HEIGHT(size, isHorizontal) (isHorizontal ? size.height : size.width)

    51 #define GET_X(size, isHorizontal) (isHorizontal ? size.x : size.y)

    52 #define GET_Y(size, isHorizontal) (isHorizontal ? size.y : size.x)

    53 #define GET_COORD(aX, aY, isHorizontal) (isHorizontal ? aX : aY)

    55 #define SET_WIDTH(size, coord, isHorizontal)  if (isHorizontal) { (size).width  = (coord); } else { (size).height = (coord); }

    56 #define SET_HEIGHT(size, coord, isHorizontal) if (isHorizontal) { (size).height = (coord); } else { (size).width  = (coord); }

    57 #define SET_X(size, coord, isHorizontal) if (isHorizontal) { (size).x = (coord); } else { (size).y  = (coord); }

    58 #define SET_Y(size, coord, isHorizontal) if (isHorizontal) { (size).y = (coord); } else { (size).x  = (coord); }

    60 #define SET_COORD(aX, aY, coord, isHorizontal) if (isHorizontal) { aX = (coord); } else { aY  = (coord); }

    62 nsresult NS_NewSprocketLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);

    64 class nsSprocketLayout : public nsBoxLayout {

    66 public:

    68   friend nsresult NS_NewSprocketLayout(nsIPresShell* aPresShell, nsCOMPtr<nsBoxLayout>& aNewLayout);

    69   static void Shutdown();

    71   NS_IMETHOD Layout(nsIFrame* aBox, nsBoxLayoutState& aState) MOZ_OVERRIDE;

    73   virtual nsSize GetPrefSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    74   virtual nsSize GetMinSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    75   virtual nsSize GetMaxSize(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    76   virtual nscoord GetAscent(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    78   nsSprocketLayout();

    80   static bool IsHorizontal(nsIFrame* aBox);

    82   static void SetLargestSize(nsSize& aSize1, const nsSize& aSize2, bool aIsHorizontal);

    83   static void SetSmallestSize(nsSize& aSize1, const nsSize& aSize2, bool aIsHorizontal);

    85   static void AddLargestSize(nsSize& aSize, const nsSize& aSizeToAdd, bool aIsHorizontal);

    86   static void AddSmallestSize(nsSize& aSize, const nsSize& aSizeToAdd, bool aIsHorizontal);

    87   static void AddCoord(nscoord& aCoord, nscoord aCoordToAdd);

    89 protected:

    92   void ComputeChildsNextPosition(nsIFrame* aBox,

    93                                  const nscoord& aCurX,

    94                                  const nscoord& aCurY,

    95                                  nscoord& aNextX,

    96                                  nscoord& aNextY,

    97                                  const nsRect& aChildSize);

    99   void ChildResized(nsIFrame* aBox,

   100                     nsBoxLayoutState& aState,

   101                     nsIFrame* aChild,

   102                     nsBoxSize* aChildBoxSize,

   103                     nsComputedBoxSize* aChildComputedBoxSize,

   104                     nsBoxSize* aBoxSizes,

   105                     nsComputedBoxSize* aComputedBoxSizes,

   106                     const nsRect& aChildLayoutRect,

   107                     nsRect& aChildActualRect,

   108                     nsRect& aContainingRect,

   109                     int32_t aFlexes,

   110                     bool& aFinished);

   112   void AlignChildren(nsIFrame* aBox,

   113                      nsBoxLayoutState& aState);

   115   virtual void ComputeChildSizes(nsIFrame* aBox,

   116                          nsBoxLayoutState& aState,

   117                          nscoord& aGivenSize,

   118                          nsBoxSize* aBoxSizes,

   119                          nsComputedBoxSize*& aComputedBoxSizes);

   122   virtual void PopulateBoxSizes(nsIFrame* aBox, nsBoxLayoutState& aBoxLayoutState,

   123                                 nsBoxSize*& aBoxSizes, nscoord& aMinSize,

   124                                 nscoord& aMaxSize, int32_t& aFlexes);

   126   virtual void InvalidateComputedSizes(nsComputedBoxSize* aComputedBoxSizes);

   128   virtual bool GetDefaultFlex(int32_t& aFlex);

   130   virtual void GetFrameState(nsIFrame* aBox, nsFrameState& aState);

   132 private:

   135   // because the sprocket layout manager has no instance variables. We

   136   // can make a static one and reuse it everywhere.

   137   static nsBoxLayout* gInstance;

   139 };

   141 #endif

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