Attach FrameProperties to each frame instead of using a shared hashtable

Dispense the shared hashtable and instead attach the frame property list directly to nsIFrame.

1 files changed, 31 insertions, 39 deletions

diff --git a/layout/generic/nsContainerFrame.cpp b/layout/generic/nsContainerFrame.cpp
index 813d19dfe2..2933ac4cf5 100644
--- a/layout/generic/nsContainerFrame.cpp
+++ b/layout/generic/nsContainerFrame.cpp
@@ -78,7 +78,7 @@ nsContainerFrame::SetInitialChildList(ChildListID  aListID,
                "Only top layer frames should have backdrop");
     MOZ_ASSERT(GetStateBits() & NS_FRAME_OUT_OF_FLOW,
                "Top layer frames should be out-of-flow");
-    MOZ_ASSERT(!Properties().Get(BackdropProperty()),
+    MOZ_ASSERT(!GetProperty(BackdropProperty()),
                "We shouldn't have setup backdrop frame list before");
 #ifdef DEBUG
     {
@@ -93,7 +93,7 @@ nsContainerFrame::SetInitialChildList(ChildListID  aListID,
 #endif
     nsFrameList* list =
       new (PresContext()->PresShell()) nsFrameList(aChildList);
-    Properties().Set(BackdropProperty(), list);
+    SetProperty(BackdropProperty(), list);
   } else {
     MOZ_ASSERT_UNREACHABLE("Unexpected child list");
   }
@@ -189,18 +189,17 @@ nsContainerFrame::DestroyAbsoluteFrames(nsIFrame* aDestructRoot)
 void
 nsContainerFrame::SafelyDestroyFrameListProp(nsIFrame* aDestructRoot,
                                              nsIPresShell* aPresShell,
-                                             FramePropertyTable* aPropTable,
                                              FrameListPropertyDescriptor aProp)
 {
   // Note that the last frame can be removed through another route and thus
   // delete the property -- that's why we fetch the property again before
   // removing each frame rather than fetching it once and iterating the list.
-  while (nsFrameList* frameList = aPropTable->Get(this, aProp)) {
+  while (nsFrameList* frameList = GetProperty(aProp)) {
     nsIFrame* frame = frameList->RemoveFirstChild();
     if (MOZ_LIKELY(frame)) {
       frame->DestroyFrom(aDestructRoot);
     } else {
-      aPropTable->Remove(this, aProp);
+      RemoveProperty(aProp);
       frameList->Delete(aPresShell);
       return;
     }
@@ -223,22 +222,21 @@ nsContainerFrame::DestroyFrom(nsIFrame* aDestructRoot)
   // Destroy frames on the auxiliary frame lists and delete the lists.
   nsPresContext* pc = PresContext();
   nsIPresShell* shell = pc->PresShell();
-  FramePropertyTable* props = pc->PropertyTable();
-  SafelyDestroyFrameListProp(aDestructRoot, shell, props, OverflowProperty());
+  SafelyDestroyFrameListProp(aDestructRoot, shell, OverflowProperty());
 
   MOZ_ASSERT(IsFrameOfType(nsIFrame::eCanContainOverflowContainers) ||
-             !(props->Get(this, nsContainerFrame::OverflowContainersProperty()) ||
-               props->Get(this, nsContainerFrame::ExcessOverflowContainersProperty())),
+             !(GetProperty(nsContainerFrame::OverflowContainersProperty()) ||
+               GetProperty(nsContainerFrame::ExcessOverflowContainersProperty())),
              "this type of frame should't have overflow containers");
-  SafelyDestroyFrameListProp(aDestructRoot, shell, props,
+  SafelyDestroyFrameListProp(aDestructRoot, shell,
                              OverflowContainersProperty());
-  SafelyDestroyFrameListProp(aDestructRoot, shell, props,
+  SafelyDestroyFrameListProp(aDestructRoot, shell,
                              ExcessOverflowContainersProperty());
 
-  MOZ_ASSERT(!props->Get(this, BackdropProperty()) ||
+  MOZ_ASSERT(!GetProperty(BackdropProperty()) ||
              StyleDisplay()->mTopLayer != NS_STYLE_TOP_LAYER_NONE,
              "only top layer frame may have backdrop");
-  SafelyDestroyFrameListProp(aDestructRoot, shell, props, BackdropProperty());
+  SafelyDestroyFrameListProp(aDestructRoot, shell, BackdropProperty());
 
   nsSplittableFrame::DestroyFrom(aDestructRoot);
 }
@@ -278,12 +276,11 @@ nsContainerFrame::GetChildList(ChildListID aListID) const
 
 static void
 AppendIfNonempty(const nsIFrame* aFrame,
-                 FramePropertyTable* aPropTable,
                  nsContainerFrame::FrameListPropertyDescriptor aProperty,
                  nsTArray<nsIFrame::ChildList>* aLists,
                  nsIFrame::ChildListID aListID)
 {
-  if (nsFrameList* list = aPropTable->Get(aFrame, aProperty)) {
+  if (nsFrameList* list = aFrame->GetProperty(aProperty)) {
     list->AppendIfNonempty(aLists, aListID);
   }
 }
@@ -292,20 +289,19 @@ void
 nsContainerFrame::GetChildLists(nsTArray<ChildList>* aLists) const
 {
   mFrames.AppendIfNonempty(aLists, kPrincipalList);
-  FramePropertyTable* propTable = PresContext()->PropertyTable();
-  ::AppendIfNonempty(this, propTable, OverflowProperty(),
+  ::AppendIfNonempty(this, OverflowProperty(),
                      aLists, kOverflowList);
   if (IsFrameOfType(nsIFrame::eCanContainOverflowContainers)) {
-    ::AppendIfNonempty(this, propTable, OverflowContainersProperty(),
+    ::AppendIfNonempty(this, OverflowContainersProperty(),
                        aLists, kOverflowContainersList);
-    ::AppendIfNonempty(this, propTable, ExcessOverflowContainersProperty(),
+    ::AppendIfNonempty(this, ExcessOverflowContainersProperty(),
                        aLists, kExcessOverflowContainersList);
   }
   // Bypass BackdropProperty hashtable lookup for any in-flow frames
   // since frames in the top layer (only which can have backdrop) are
   // definitely out-of-flow.
   if (GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
-    ::AppendIfNonempty(this, propTable, BackdropProperty(),
+    ::AppendIfNonempty(this, BackdropProperty(),
                        aLists, kBackdropList);
   }
   nsSplittableFrame::GetChildLists(aLists);
@@ -1335,15 +1331,15 @@ nsContainerFrame::DisplayOverflowContainers(nsDisplayListBuilder*   aBuilder,
 }
 
 static bool
-TryRemoveFrame(nsIFrame* aFrame, FramePropertyTable* aPropTable,
+TryRemoveFrame(nsIFrame* aFrame,
                nsContainerFrame::FrameListPropertyDescriptor aProp,
                nsIFrame* aChildToRemove)
 {
-  nsFrameList* list = aPropTable->Get(aFrame, aProp);
+  nsFrameList* list = aFrame->GetProperty(aProp);
   if (list && list->StartRemoveFrame(aChildToRemove)) {
     // aChildToRemove *may* have been removed from this list.
     if (list->IsEmpty()) {
-      aPropTable->Remove(aFrame, aProp);
+      aFrame->RemoveProperty(aProp);
       list->Delete(aFrame->PresContext()->PresShell());
     }
     return true;
@@ -1356,13 +1352,12 @@ nsContainerFrame::MaybeStealOverflowContainerFrame(nsIFrame* aChild)
 {
   bool removed = false;
   if (MOZ_UNLIKELY(aChild->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
-    FramePropertyTable* propTable = PresContext()->PropertyTable();
     // Try removing from the overflow container list.
-    removed = ::TryRemoveFrame(this, propTable, OverflowContainersProperty(),
+    removed = ::TryRemoveFrame(this, OverflowContainersProperty(),
                                aChild);
     if (!removed) {
       // It might be in the excess overflow container list.
-      removed = ::TryRemoveFrame(this, propTable,
+      removed = ::TryRemoveFrame(this,
                                  ExcessOverflowContainersProperty(),
                                  aChild);
     }
@@ -1377,10 +1372,9 @@ nsContainerFrame::StealFrame(nsIFrame* aChild)
   if (!mFrames.ContainsFrame(aChild)) {
     nsFrameList* list = GetOverflowFrames();
     if (!list || !list->ContainsFrame(aChild)) {
-      FramePropertyTable* propTable = PresContext()->PropertyTable();
-      list = propTable->Get(this, OverflowContainersProperty());
+      list = GetProperty(OverflowContainersProperty());
       if (!list || !list->ContainsFrame(aChild)) {
-        list = propTable->Get(this, ExcessOverflowContainersProperty());
+        list = GetProperty(ExcessOverflowContainersProperty());
         MOZ_ASSERT(list && list->ContainsFrame(aChild), "aChild isn't our child"
                    " or on a frame list not supported by StealFrame");
       }
@@ -1536,20 +1530,20 @@ nsContainerFrame::SetOverflowFrames(const nsFrameList& aOverflowFrames)
   nsPresContext* pc = PresContext();
   nsFrameList* newList = new (pc->PresShell()) nsFrameList(aOverflowFrames);
 
-  pc->PropertyTable()->Set(this, OverflowProperty(), newList);
+  SetProperty(OverflowProperty(), newList);
 }
 
 nsFrameList*
 nsContainerFrame::GetPropTableFrames(
   FrameListPropertyDescriptor aProperty) const
 {
-  return PresContext()->PropertyTable()->Get(this, aProperty);
+  return GetProperty(aProperty);
 }
 
 nsFrameList*
 nsContainerFrame::RemovePropTableFrames(FrameListPropertyDescriptor aProperty)
 {
-  return PresContext()->PropertyTable()->Remove(this, aProperty);
+  return RemoveProperty(aProperty);
 }
 
 void
@@ -1563,7 +1557,7 @@ nsContainerFrame::SetPropTableFrames(nsFrameList* aFrameList,
     IsFrameOfType(nsIFrame::eCanContainOverflowContainers),
     "this type of frame can't have overflow containers");
   MOZ_ASSERT(!GetPropTableFrames(aProperty));
-  PresContext()->PropertyTable()->Set(this, aProperty, aFrameList);
+  SetProperty(aProperty, aFrameList);
 }
 
 /**
@@ -2253,13 +2247,11 @@ nsOverflowContinuationTracker::EndFinish(nsIFrame* aChild)
     return;
   }
   // Forget mOverflowContList if it was deleted.
-  nsPresContext* pc = aChild->PresContext();
-  FramePropertyTable* propTable = pc->PropertyTable();
-  nsFrameList* eoc = propTable->Get(
-    mParent, nsContainerFrame::ExcessOverflowContainersProperty());
+  nsFrameList* eoc = mParent->GetProperty
+    (nsContainerFrame::ExcessOverflowContainersProperty());
   if (eoc != mOverflowContList) {
-    nsFrameList* oc = static_cast<nsFrameList*>(propTable->Get(mParent,
-                        nsContainerFrame::OverflowContainersProperty()));
+    nsFrameList* oc = static_cast<nsFrameList*>(mParent->GetProperty
+                         (nsContainerFrame::OverflowContainersProperty()));
     if (oc != mOverflowContList) {
       // mOverflowContList was deleted
       mPrevOverflowCont = nullptr;