The Tor Browser: layout/xul/nsBox.h@925c144e1f1f

     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 nsBox_h___

     7 #define nsBox_h___

     9 #include "mozilla/Attributes.h"

    10 #include "nsIFrame.h"

    12 class nsITheme;

    14 class nsBox : public nsIFrame {

    16 public:

    18   friend class nsIFrame;

    20   static void Shutdown();

    22   virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    23   virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    24   virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    25   virtual nscoord GetFlex(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    26   virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    28   virtual nsSize GetMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    30   virtual bool IsCollapsed() MOZ_OVERRIDE;

    32   virtual void SetBounds(nsBoxLayoutState& aBoxLayoutState, const nsRect& aRect,

    33                          bool aRemoveOverflowAreas = false) MOZ_OVERRIDE;

    35   virtual nsresult GetBorder(nsMargin& aBorderAndPadding) MOZ_OVERRIDE;

    36   virtual nsresult GetPadding(nsMargin& aBorderAndPadding) MOZ_OVERRIDE;

    37   virtual nsresult GetMargin(nsMargin& aMargin) MOZ_OVERRIDE;

    39   virtual Valignment GetVAlign() const MOZ_OVERRIDE { return vAlign_Top; }

    40   virtual Halignment GetHAlign() const MOZ_OVERRIDE { return hAlign_Left; }

    42   virtual nsresult RelayoutChildAtOrdinal(nsBoxLayoutState& aState, nsIFrame* aChild) MOZ_OVERRIDE;

    44 #ifdef DEBUG_LAYOUT

    45   NS_IMETHOD GetDebugBoxAt(const nsPoint& aPoint, nsIFrame** aBox);

    46   virtual nsresult GetDebug(bool& aDebug) MOZ_OVERRIDE;

    47   virtual nsresult SetDebug(nsBoxLayoutState& aState, bool aDebug) MOZ_OVERRIDE;

    49   virtual nsresult DumpBox(FILE* out) MOZ_OVERRIDE;

    50   NS_HIDDEN_(void) PropagateDebug(nsBoxLayoutState& aState);

    51 #endif

    53   nsBox();

    54   virtual ~nsBox();

    56   /**

    57    * Returns true if this box clips its children, e.g., if this box is an sc

    58 rollbox.

    59   */

    60   virtual bool DoesClipChildren();

    61   virtual bool ComputesOwnOverflowArea() = 0;

    63   NS_HIDDEN_(nsresult) SyncLayout(nsBoxLayoutState& aBoxLayoutState);

    65   bool DoesNeedRecalc(const nsSize& aSize);

    66   bool DoesNeedRecalc(nscoord aCoord);

    67   void SizeNeedsRecalc(nsSize& aSize);

    68   void CoordNeedsRecalc(nscoord& aCoord);

    70   void AddBorderAndPadding(nsSize& aSize);

    72   static void AddBorderAndPadding(nsIFrame* aBox, nsSize& aSize);

    73   static void AddMargin(nsIFrame* aChild, nsSize& aSize);

    74   static void AddMargin(nsSize& aSize, const nsMargin& aMargin);

    76   static nsSize BoundsCheckMinMax(const nsSize& aMinSize, const nsSize& aMaxSize);

    77   static nsSize BoundsCheck(const nsSize& aMinSize, const nsSize& aPrefSize, const nsSize& aMaxSize);

    78   static nscoord BoundsCheck(nscoord aMinSize, nscoord aPrefSize, nscoord aMaxSize);

    80 protected:

    82 #ifdef DEBUG_LAYOUT

    83   virtual void AppendAttribute(const nsAutoString& aAttribute, const nsAutoString& aValue, nsAutoString& aResult);

    85   virtual void ListBox(nsAutoString& aResult);

    86 #endif

    88   virtual void GetLayoutFlags(uint32_t& aFlags);

    90   NS_HIDDEN_(nsresult) BeginLayout(nsBoxLayoutState& aState);

    91   NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);

    92   NS_HIDDEN_(nsresult) EndLayout(nsBoxLayoutState& aState);

    94 #ifdef DEBUG_LAYOUT

    95   virtual void GetBoxName(nsAutoString& aName);

    96   NS_HIDDEN_(void) PropagateDebug(nsBoxLayoutState& aState);

    97 #endif

    99   static bool gGotTheme;

   100   static nsITheme* gTheme;

   102   enum eMouseThrough {

   103     unset,

   104     never,

   105     always

   106   };

   108 private:

   110   //nscoord mX;

   111   //nscoord mY;

   112 };

   114 #ifdef DEBUG_LAYOUT

   115 #define NS_BOX_ASSERTION(box,expr,str) \

   116   if (!(expr)) { \

   117        box->DumpBox(stdout); \

   118        NS_DebugBreak(NSDebugAssertion, str, #expr, __FILE__, __LINE__); \

   119   }

   120 #else

   121 #define NS_BOX_ASSERTION(box,expr,str) {}

   122 #endif

   124 #endif

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