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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsSprocketLayout_h___
#define nsSprocketLayout_h___
#include "mozilla/Attributes.h"
#include "nsBoxLayout.h"
#include "nsCOMPtr.h"
#include "nsFrameState.h"
class nsIFrame;
struct nsRect;
class nsBoxSize {
public:
nsBoxSize();
nscoord pref;
nscoord min;
nscoord max;
nscoord flex;
nscoord left;
nscoord right;
bool collapsed;
bool bogus;
nsBoxSize* next;
void* operator new(size_t sz, nsBoxLayoutState& aState) noexcept(true);
void operator delete(void* aPtr, size_t sz);
};
class nsComputedBoxSize {
public:
nsComputedBoxSize();
nscoord size;
bool valid;
bool resized;
nsComputedBoxSize* next;
void* operator new(size_t sz, nsBoxLayoutState& aState) noexcept(true);
void operator delete(void* aPtr, size_t sz);
};
#define GET_WIDTH(size, isHorizontal) (isHorizontal ? size.width : size.height)
#define GET_HEIGHT(size, isHorizontal) (isHorizontal ? size.height : size.width)
#define GET_X(size, isHorizontal) (isHorizontal ? size.x : size.y)
#define GET_Y(size, isHorizontal) (isHorizontal ? size.y : size.x)
#define GET_COORD(aX, aY, isHorizontal) (isHorizontal ? aX : aY)
#define SET_WIDTH(size, coord, isHorizontal) \
if (isHorizontal) { \
(size).width = (coord); \
} else { \
(size).height = (coord); \
}
#define SET_HEIGHT(size, coord, isHorizontal) \
if (isHorizontal) { \
(size).height = (coord); \
} else { \
(size).width = (coord); \
}
#define SET_X(size, coord, isHorizontal) \
if (isHorizontal) { \
(size).x = (coord); \
} else { \
(size).y = (coord); \
}
#define SET_Y(size, coord, isHorizontal) \
if (isHorizontal) { \
(size).y = (coord); \
} else { \
(size).x = (coord); \
}
#define SET_COORD(aX, aY, coord, isHorizontal) \
if (isHorizontal) { \
aX = (coord); \
} else { \
aY = (coord); \
}
nsresult NS_NewSprocketLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
class nsSprocketLayout : public nsBoxLayout {
public:
friend nsresult NS_NewSprocketLayout(nsCOMPtr<nsBoxLayout>& aNewLayout);
static void Shutdown();
NS_IMETHOD XULLayout(nsIFrame* aBox, nsBoxLayoutState& aState) override;
virtual nsSize GetXULPrefSize(nsIFrame* aBox,
nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMinSize(nsIFrame* aBox,
nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetXULMaxSize(nsIFrame* aBox,
nsBoxLayoutState& aBoxLayoutState) override;
virtual nscoord GetAscent(nsIFrame* aBox,
nsBoxLayoutState& aBoxLayoutState) override;
nsSprocketLayout();
static bool IsXULHorizontal(nsIFrame* aBox);
static void SetLargestSize(nsSize& aSize1, const nsSize& aSize2,
bool aIsHorizontal);
static void SetSmallestSize(nsSize& aSize1, const nsSize& aSize2,
bool aIsHorizontal);
static void AddLargestSize(nsSize& aSize, const nsSize& aSizeToAdd,
bool aIsHorizontal);
static void AddSmallestSize(nsSize& aSize, const nsSize& aSizeToAdd,
bool aIsHorizontal);
static void AddCoord(nscoord& aCoord, nscoord aCoordToAdd);
protected:
void ComputeChildsNextPosition(nsIFrame* aBox, const nscoord& aCurX,
const nscoord& aCurY, nscoord& aNextX,
nscoord& aNextY, const nsRect& aChildSize);
void ChildResized(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChild,
nsBoxSize* aChildBoxSize,
nsComputedBoxSize* aChildComputedBoxSize,
nsBoxSize* aBoxSizes, nsComputedBoxSize* aComputedBoxSizes,
const nsRect& aChildLayoutRect, nsRect& aChildActualRect,
nsRect& aContainingRect, int32_t aFlexes, bool& aFinished);
void AlignChildren(nsIFrame* aBox, nsBoxLayoutState& aState);
virtual void ComputeChildSizes(nsIFrame* aBox, nsBoxLayoutState& aState,
nscoord& aGivenSize, nsBoxSize* aBoxSizes,
nsComputedBoxSize*& aComputedBoxSizes);
virtual void PopulateBoxSizes(nsIFrame* aBox,
nsBoxLayoutState& aBoxLayoutState,
nsBoxSize*& aBoxSizes, nscoord& aMinSize,
nscoord& aMaxSize, int32_t& aFlexes);
virtual void InvalidateComputedSizes(nsComputedBoxSize* aComputedBoxSizes);
virtual bool GetDefaultFlex(int32_t& aFlex);
virtual void GetFrameState(nsIFrame* aBox, nsFrameState& aState);
private:
// because the sprocket layout manager has no instance variables. We
// can make a static one and reuse it everywhere.
static nsBoxLayout* gInstance;
};
#endif