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