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