Bug 1159772. Don't let nsContainerFrame::SyncWindowProperties make widget calls that can result in synchronous painting during reflow or frame construction. r=mats

Specifically on Windows nsIWidget::SetTransparencyMode can result in sync painting.

So we give nsContainerFrame::SyncWindowProperties a sync or async option and use the view manager post pending update infrastructure to flush SyncWindowProperties calls async.

layout/base/nsCSSFrameConstructor.cpp

@@ -2688,7 +2688,7 @@ nsCSSFrameConstructor::ConstructRootFrame()
   nsContainerFrame::SyncFrameViewProperties(mPresShell->GetPresContext(), viewportFrame,
                                             viewportPseudoStyle, rootView);
   nsContainerFrame::SyncWindowProperties(mPresShell->GetPresContext(), viewportFrame,
-                                         rootView);
+                                         rootView, nullptr, nsContainerFrame::SET_ASYNC);
 
   // Make it an absolute container for fixed-pos elements
   viewportFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);

layout/base/nsIPresShell.h

@@ -140,8 +140,8 @@ typedef struct CapturingContentInfo {
 
 // d910f009-d209-74c1-6b04-30c83c051c78
 #define NS_IPRESSHELL_IID \
-  { 0xd910f009, 0xd209, 0x74c1, \
-    { 0x6b, 0x04, 0x30, 0xc8, 0x3c, 0x05, 0x1c, 0x78 } }
+  { 0x025264c6, 0x0b12, 0x4804, \
+    { 0xa3, 0x3e, 0xb7, 0x73, 0xf2, 0x19, 0x48, 0x90 } }
 
 // debug VerifyReflow flags
 #define VERIFY_REFLOW_ON                    0x01
@@ -1661,6 +1661,8 @@ public:
   bool HasPendingReflow() const
     { return mReflowScheduled || mReflowContinueTimer; }
 
+  void SyncWindowProperties(nsView* aView);
+
 protected:
   friend class nsRefreshDriver;
 

layout/base/nsPresShell.cpp

@@ -9245,7 +9245,8 @@ PresShell::DoReflow(nsIFrame* target, bool aInterruptible)
                                              target->GetView(),
                                              boundsRelativeToTarget);
   nsContainerFrame::SyncWindowProperties(mPresContext, target,
-                                         target->GetView(), &rcx);
+                                         target->GetView(), &rcx,
+                                         nsContainerFrame::SET_ASYNC);
 
   target->DidReflow(mPresContext, nullptr, nsDidReflowStatus::FINISHED);
   if (target == rootFrame && size.BSize(wm) == NS_UNCONSTRAINEDSIZE) {
@@ -11081,3 +11082,13 @@ PresShell::ResumePainting()
   mPaintingIsFrozen = false;
   GetPresContext()->RefreshDriver()->Thaw();
 }
+
+void
+nsIPresShell::SyncWindowProperties(nsView* aView)
+{
+  nsIFrame* frame = aView->GetFrame();
+  if (frame && mPresContext) {
+    nsRenderingContext rcx(CreateReferenceRenderingContext());
+    nsContainerFrame::SyncWindowProperties(mPresContext, frame, aView, &rcx, 0);
+  }
+}

layout/generic/nsContainerFrame.cpp

@@ -610,13 +610,14 @@ void
 nsContainerFrame::SyncWindowProperties(nsPresContext*       aPresContext,
                                        nsIFrame*            aFrame,
                                        nsView*              aView,
-                                       nsRenderingContext*  aRC)
+                                       nsRenderingContext*  aRC,
+                                       uint32_t             aFlags)
 {
 #ifdef MOZ_XUL
   if (!aView || !nsCSSRendering::IsCanvasFrame(aFrame) || !aView->HasWidget())
     return;
 
-  nsIWidget* windowWidget = GetPresContextContainerWidget(aPresContext);
+  nsCOMPtr<nsIWidget> windowWidget = GetPresContextContainerWidget(aPresContext);
   if (!windowWidget || !IsTopLevelWidget(windowWidget))
     return;
 
@@ -650,14 +651,27 @@ nsContainerFrame::SyncWindowProperties(nsPresContext*       aPresContext,
   if (!rootFrame)
     return;
 
+  if (aFlags & SET_ASYNC) {
+    aView->SetNeedsWindowPropertiesSync();
+    return;
+  }
+
+  nsRefPtr<nsPresContext> kungFuDeathGrip(aPresContext);
+  nsWeakFrame weak(rootFrame);
+
   nsTransparencyMode mode = nsLayoutUtils::GetFrameTransparency(aFrame, rootFrame);
-  nsIWidget* viewWidget = aView->GetWidget();
+  int32_t shadow = rootFrame->StyleUIReset()->mWindowShadow;
+  nsCOMPtr<nsIWidget> viewWidget = aView->GetWidget();
   viewWidget->SetTransparencyMode(mode);
-  windowWidget->SetWindowShadowStyle(rootFrame->StyleUIReset()->mWindowShadow);
+  windowWidget->SetWindowShadowStyle(shadow);
 
   if (!aRC)
     return;
 
+  if (!weak.IsAlive()) {
+    return;
+  }
+
   nsBoxLayoutState aState(aPresContext, aRC);
   nsSize minSize = rootFrame->GetMinSize(aState);
   nsSize maxSize = rootFrame->GetMaxSize(aState);

layout/generic/nsContainerFrame.h

@@ -180,10 +180,16 @@ public:
 
   // Syncs properties to the top level view and window, like transparency and
   // shadow.
+  // The SET_ASYNC indicates that the actual nsIWidget calls to sync the window
+  // properties should be done async.
+  enum {
+    SET_ASYNC = 0x01,
+  };
   static void SyncWindowProperties(nsPresContext*       aPresContext,
                                    nsIFrame*            aFrame,
                                    nsView*              aView,
-                                   nsRenderingContext*  aRC = nullptr);
+                                   nsRenderingContext*  aRC,
+                                   uint32_t             aFlags);
 
   // Sets the view's attributes from the frame style.
   // - visibility

view/nsView.cpp

@@ -673,6 +673,16 @@ nsView::InitializeWindow(bool aEnableDragDrop, bool aResetVisibility)
   }
 }
 
+void
+nsView::SetNeedsWindowPropertiesSync()
+{
+  mNeedsWindowPropertiesSync = true;
+  if (mViewManager) {
+    mViewManager->PostPendingUpdate();
+  }
+}
+
+
 // Attach to a top level widget and start receiving mirrored events.
 nsresult nsView::AttachToTopLevelWidget(nsIWidget* aWidget)
 {

view/nsView.h

@@ -290,6 +290,8 @@ public:
     mForcedRepaint = aForceRepaint; 
   }
 
+  void SetNeedsWindowPropertiesSync();
+
   /**
    * Make aWidget direct its events to this view.
    * The caller must call DetachWidgetEventHandler before this view
@@ -463,6 +465,7 @@ private:
   uint32_t          mVFlags;
   bool              mWidgetIsTopLevel;
   bool              mForcedRepaint;
+  bool              mNeedsWindowPropertiesSync;
 };
 
 #endif

view/nsViewManager.cpp

@@ -367,6 +367,17 @@ nsViewManager::ProcessPendingUpdatesForView(nsView* aView,
   aView->GetViewManager()->ProcessPendingUpdatesRecurse(aView, widgets);
   for (uint32_t i = 0; i < widgets.Length(); ++i) {
     nsView* view = nsView::GetViewFor(widgets[i]);
+    if (view) {
+      if (view->mNeedsWindowPropertiesSync) {
+        view->mNeedsWindowPropertiesSync = false;
+        if (nsViewManager* vm = view->GetViewManager()) {
+          if (nsIPresShell* ps = vm->GetPresShell()) {
+            ps->SyncWindowProperties(view);
+          }
+        }
+      }
+    }
+    view = nsView::GetViewFor(widgets[i]);
     if (view) {
       view->ResetWidgetBounds(false, true);
     }