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Diffstat (limited to '')
| -rw-r--r-- | layout/xul/nsSprocketLayout.h | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/layout/xul/nsSprocketLayout.h b/layout/xul/nsSprocketLayout.h new file mode 100644 index 0000000000..e1e7fe377e --- /dev/null +++ b/layout/xul/nsSprocketLayout.h @@ -0,0 +1,156 @@ +/* -*- 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 |