зеркало из https://github.com/mozilla/gecko-dev.git
130 строки
3.8 KiB
C++
130 строки
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsBox_h___
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#define nsBox_h___
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#include "mozilla/Attributes.h"
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#include "nsIFrame.h"
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class nsITheme;
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class nsBox : public nsIFrame {
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public:
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friend class nsIFrame;
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static void Shutdown();
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virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nscoord GetXULFlex() override;
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virtual nscoord GetXULBoxAscent(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) override;
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virtual bool IsCollapsed() override;
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virtual void SetBounds(nsBoxLayoutState& aBoxLayoutState, const nsRect& aRect,
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bool aRemoveOverflowAreas = false) override;
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virtual nsresult GetBorder(nsMargin& aBorderAndPadding) override;
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virtual nsresult GetPadding(nsMargin& aBorderAndPadding) override;
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virtual nsresult GetMargin(nsMargin& aMargin) override;
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virtual Valignment GetVAlign() const override { return vAlign_Top; }
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virtual Halignment GetHAlign() const override { return hAlign_Left; }
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virtual nsresult RelayoutChildAtOrdinal(nsIFrame* aChild) override;
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#ifdef DEBUG_LAYOUT
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NS_IMETHOD GetDebugBoxAt(const nsPoint& aPoint, nsIFrame** aBox);
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virtual nsresult GetDebug(bool& aDebug) override;
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virtual nsresult SetDebug(nsBoxLayoutState& aState, bool aDebug) override;
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virtual nsresult DumpBox(FILE* out) override;
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void PropagateDebug(nsBoxLayoutState& aState);
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#endif
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nsBox();
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virtual ~nsBox();
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/**
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* Returns true if this box clips its children, e.g., if this box is an sc
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rollbox.
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*/
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virtual bool DoesClipChildren();
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virtual bool ComputesOwnOverflowArea() = 0;
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nsresult SyncLayout(nsBoxLayoutState& aBoxLayoutState);
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bool DoesNeedRecalc(const nsSize& aSize);
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bool DoesNeedRecalc(nscoord aCoord);
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void SizeNeedsRecalc(nsSize& aSize);
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void CoordNeedsRecalc(nscoord& aCoord);
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void AddBorderAndPadding(nsSize& aSize);
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static void AddBorderAndPadding(nsIFrame* aBox, nsSize& aSize);
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static void AddMargin(nsIFrame* aChild, nsSize& aSize);
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static void AddMargin(nsSize& aSize, const nsMargin& aMargin);
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static nsSize BoundsCheckMinMax(const nsSize& aMinSize, const nsSize& aMaxSize);
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static nsSize BoundsCheck(const nsSize& aMinSize, const nsSize& aPrefSize, const nsSize& aMaxSize);
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static nscoord BoundsCheck(nscoord aMinSize, nscoord aPrefSize, nscoord aMaxSize);
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static nsIFrame* GetChildBox(const nsIFrame* aFrame);
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static nsIFrame* GetNextBox(const nsIFrame* aFrame);
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static nsIFrame* GetParentBox(const nsIFrame* aFrame);
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protected:
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#ifdef DEBUG_LAYOUT
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virtual void AppendAttribute(const nsAutoString& aAttribute, const nsAutoString& aValue, nsAutoString& aResult);
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virtual void ListBox(nsAutoString& aResult);
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#endif
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virtual void GetLayoutFlags(uint32_t& aFlags);
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nsresult BeginLayout(nsBoxLayoutState& aState);
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NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
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nsresult EndLayout(nsBoxLayoutState& aState);
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#ifdef DEBUG_LAYOUT
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virtual void GetBoxName(nsAutoString& aName);
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void PropagateDebug(nsBoxLayoutState& aState);
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#endif
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static bool gGotTheme;
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static nsITheme* gTheme;
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enum eMouseThrough {
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unset,
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never,
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always
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};
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private:
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//nscoord mX;
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//nscoord mY;
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};
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#ifdef DEBUG_LAYOUT
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#define NS_BOX_ASSERTION(box,expr,str) \
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if (!(expr)) { \
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box->DumpBox(stdout); \
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NS_DebugBreak(NSDebugAssertion, str, #expr, __FILE__, __LINE__); \
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}
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#else
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#define NS_BOX_ASSERTION(box,expr,str) {}
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#endif
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#endif
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