Issue #1916 - Part 1: Convert flags passed to ReflowChild, FinishReflowChild, etc into an enum class.

Backported from Mozilla bug 1571250.

layout/xul/nsBox.cpp

@@ -235,16 +235,14 @@ nsBox::SetXULBounds(nsBoxLayoutState& aState, const nsRect& aRect, bool aRemoveO
 
     nsRect rect(mRect);
 
-    uint32_t flags = GetXULLayoutFlags();
+  ReflowChildFlags flags = GetXULLayoutFlags() | aState.LayoutFlags();
 
-    uint32_t stateFlags = aState.LayoutFlags();
-
-    flags |= stateFlags;
-
-    if ((flags & NS_FRAME_NO_MOVE_FRAME) == NS_FRAME_NO_MOVE_FRAME)
+  if ((flags & ReflowChildFlags::NoMoveFrame) ==
+      ReflowChildFlags::NoMoveFrame) {
       SetSize(aRect.Size());
-    else
+  } else {
       SetRect(aRect);
+  }
 
     // Nuke the overflow area. The caller is responsible for restoring
     // it if necessary.
@@ -253,8 +251,7 @@ nsBox::SetXULBounds(nsBoxLayoutState& aState, const nsRect& aRect, bool aRemoveO
       ClearOverflowRects();
     }
 
-    if (!(flags & NS_FRAME_NO_MOVE_VIEW))
-    {
+    if (!(flags & ReflowChildFlags::NoMoveView)) {
       nsContainerFrame::PositionFrameView(this);
       if ((rect.x != aRect.x) || (rect.y != aRect.y))
         nsContainerFrame::PositionChildViews(this);
@@ -533,11 +530,7 @@ nsBox::SyncLayout(nsBoxLayoutState& aState)
 
   nsPresContext* presContext = aState.PresContext();
 
-  uint32_t flags = GetXULLayoutFlags();
-
-  uint32_t stateFlags = aState.LayoutFlags();
-
-  flags |= stateFlags;
+  ReflowChildFlags flags = GetXULLayoutFlags() | aState.LayoutFlags();
 
   nsRect visualOverflow;
 

layout/xul/nsBoxFrame.cpp

@@ -905,8 +905,8 @@ nsBoxFrame::GetXULFlex()
 NS_IMETHODIMP
 nsBoxFrame::DoXULLayout(nsBoxLayoutState& aState)
 {
-  uint32_t oldFlags = aState.LayoutFlags();
-  aState.SetLayoutFlags(0);
+  ReflowChildFlags oldFlags = aState.LayoutFlags();
+  aState.SetLayoutFlags(ReflowChildFlags::Default);
 
   nsresult rv = NS_OK;
   if (mLayoutManager) {

layout/xul/nsBoxLayoutState.cpp

@@ -19,7 +19,7 @@ nsBoxLayoutState::nsBoxLayoutState(nsPresContext* aPresContext,
   : mPresContext(aPresContext)
   , mRenderingContext(aRenderingContext)
   , mOuterReflowInput(aOuterReflowInput)
-  , mLayoutFlags(0)
+  , mLayoutFlags(nsIFrame::ReflowChildFlags::Default)
   , mReflowDepth(aReflowDepth)
   , mPaintingDisabled(false)
 {

layout/xul/nsBoxLayoutState.h

@@ -15,6 +15,7 @@
 
 #include "nsCOMPtr.h"
 #include "nsPresContext.h"
+#include "nsIFrame.h"
 #include "nsIPresShell.h"
 
 class nsRenderingContext;
@@ -38,8 +39,10 @@ public:
   nsPresContext* PresContext() const { return mPresContext; }
   nsIPresShell* PresShell() const { return mPresContext->PresShell(); }
 
-  uint32_t LayoutFlags() const { return mLayoutFlags; }
-  void SetLayoutFlags(uint32_t aFlags) { mLayoutFlags = aFlags; }
+  nsIFrame::ReflowChildFlags LayoutFlags() const { return mLayoutFlags; }
+  void SetLayoutFlags(nsIFrame::ReflowChildFlags aFlags) {
+    mLayoutFlags = aFlags;
+  }
 
   // if true no one under us will paint during reflow.
   void SetPaintingDisabled(bool aDisable) { mPaintingDisabled = aDisable; }
@@ -68,7 +71,7 @@ private:
   RefPtr<nsPresContext> mPresContext;
   nsRenderingContext *mRenderingContext;
   const ReflowInput *mOuterReflowInput;
-  uint32_t mLayoutFlags;
+  nsIFrame::ReflowChildFlags mLayoutFlags;
   uint16_t mReflowDepth; 
   bool mPaintingDisabled;
 };

layout/xul/nsDeckFrame.cpp

@@ -202,8 +202,9 @@ nsDeckFrame::DoXULLayout(nsBoxLayoutState& aState)
 {
   // Make sure we tweak the state so it does not resize our children.
   // We will do that.
-  uint32_t oldFlags = aState.LayoutFlags();
-  aState.SetLayoutFlags(NS_FRAME_NO_SIZE_VIEW | NS_FRAME_NO_VISIBILITY);
+  ReflowChildFlags oldFlags = aState.LayoutFlags();
+  aState.SetLayoutFlags(ReflowChildFlags::NoSizeView |
+                        ReflowChildFlags::NoVisibility);
 
   // do a normal layout
   nsresult rv = nsBoxFrame::DoXULLayout(aState);

layout/xul/nsMenuPopupFrame.cpp

@@ -531,7 +531,7 @@ nsMenuPopupFrame::LayoutPopup(nsBoxLayoutState& aState, nsIFrame* aParentMenu,
     }
 
     viewManager->SetViewVisibility(view, nsViewVisibility_kShow);
-    nsContainerFrame::SyncFrameViewProperties(pc, this, nullptr, view, 0);
+    nsContainerFrame::SyncFrameViewProperties(pc, this, nullptr, view);
   }
 
   // finally, if the popup just opened, send a popupshown event
@@ -993,10 +993,9 @@ nsMenuPopupFrame::HidePopup(bool aDeselectMenu, nsPopupState aNewState)
   }
 }
 
-uint32_t
-nsMenuPopupFrame::GetXULLayoutFlags()
-{
-  return NS_FRAME_NO_SIZE_VIEW | NS_FRAME_NO_MOVE_VIEW | NS_FRAME_NO_VISIBILITY;
+nsIFrame::ReflowChildFlags nsMenuPopupFrame::GetXULLayoutFlags() {
+  return ReflowChildFlags::NoSizeView | ReflowChildFlags::NoMoveView |
+         ReflowChildFlags::NoVisibility;
 }
 
 ///////////////////////////////////////////////////////////////////////////////

layout/xul/nsMenuPopupFrame.h

@@ -447,7 +447,7 @@ protected:
   nsPopupLevel PopupLevel(bool aIsNoAutoHide) const;
 
   // redefine to tell the box system not to move the views.
-  virtual uint32_t GetXULLayoutFlags() override;
+  ReflowChildFlags GetXULLayoutFlags() override;
 
   void InitPositionFromAnchorAlign(const nsAString& aAnchor,
                                    const nsAString& aAlign);