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15 : * The Original Code is Mozilla Communicator client code.
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19 : * Portions created by the Initial Developer are Copyright (C) 1998
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37 :
38 : /**
39 :
40 : Author:
41 : Eric D Vaughan
42 :
43 : **/
44 :
45 : #ifndef nsBoxLayoutState_h___
46 : #define nsBoxLayoutState_h___
47 :
48 : #include "nsIFrame.h"
49 : #include "nsCOMPtr.h"
50 : #include "nsPresContext.h"
51 : #include "nsIPresShell.h"
52 :
53 : class nsRenderingContext;
54 : class nsCalculatedBoxInfo;
55 : struct nsHTMLReflowMetrics;
56 : class nsString;
57 : class nsHTMLReflowCommand;
58 :
59 : class NS_STACK_CLASS nsBoxLayoutState
60 0 : {
61 : public:
62 : nsBoxLayoutState(nsPresContext* aPresContext,
63 : nsRenderingContext* aRenderingContext = nsnull,
64 : // see OuterReflowState() below
65 : const nsHTMLReflowState* aOuterReflowState = nsnull,
66 : PRUint16 aReflowDepth = 0) NS_HIDDEN;
67 : nsBoxLayoutState(const nsBoxLayoutState& aState) NS_HIDDEN;
68 :
69 0 : nsPresContext* PresContext() const { return mPresContext; }
70 0 : nsIPresShell* PresShell() const { return mPresContext->PresShell(); }
71 :
72 0 : PRUint32 LayoutFlags() const { return mLayoutFlags; }
73 0 : void SetLayoutFlags(PRUint32 aFlags) { mLayoutFlags = aFlags; }
74 :
75 : // if true no one under us will paint during reflow.
76 0 : void SetPaintingDisabled(bool aDisable) { mPaintingDisabled = aDisable; }
77 0 : bool PaintingDisabled() const { return mPaintingDisabled; }
78 :
79 : // The rendering context may be null for specialized uses of
80 : // nsBoxLayoutState and should be null-checked before it is used.
81 : // However, passing a null rendering context to the constructor when
82 : // doing box layout or intrinsic size calculation will cause bugs.
83 0 : nsRenderingContext* GetRenderingContext() const { return mRenderingContext; }
84 :
85 0 : void PushStackMemory() { PresShell()->PushStackMemory(); ++mReflowDepth; }
86 0 : void PopStackMemory() { PresShell()->PopStackMemory(); --mReflowDepth; }
87 0 : void* AllocateStackMemory(size_t aSize)
88 0 : { return PresShell()->AllocateStackMemory(aSize); }
89 :
90 : // The HTML reflow state that lives outside the box-block boundary.
91 : // May not be set reliably yet.
92 0 : const nsHTMLReflowState* OuterReflowState() { return mOuterReflowState; }
93 :
94 0 : PRUint16 GetReflowDepth() { return mReflowDepth; }
95 :
96 : private:
97 : nsRefPtr<nsPresContext> mPresContext;
98 : nsRenderingContext *mRenderingContext;
99 : const nsHTMLReflowState *mOuterReflowState;
100 : PRUint32 mLayoutFlags;
101 : PRUint16 mReflowDepth;
102 : bool mPaintingDisabled;
103 : };
104 :
105 : #endif
106 :
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