Bug 288117. Fix regressions in nsDocShell::SetCanvasHasFocus and in nsListBoxBodyFrame/nsListBoxObject where code made obsolete assumptions about scrollframe structure. r+sr=dbaron

docshell/base/nsDocShell.cpp

@@ -7129,9 +7129,10 @@ nsDocShell::SetCanvasHasFocus(PRBool aCanvasHasFocus)
       if (NS_SUCCEEDED(frame->QueryInterface(NS_GET_IID(nsICanvasFrame), (void**)&canvasFrame))) {
         canvasFrame->SetHasFocus(aCanvasHasFocus);
 
-        nsIView* canvasView = frame->GetViewExternal();
+        nsIViewManager* vm = presShell->GetViewManager();
-
+        if (vm) {
-        canvasView->GetViewManager()->UpdateView(canvasView, NS_VMREFRESH_NO_SYNC);
+          vm->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
+        }
 
         return NS_OK;
       }

layout/base/nsCSSFrameConstructor.cpp

@@ -4635,18 +4635,9 @@ nsCSSFrameConstructor::ConstructRootFrame(nsIContent*     aDocElement,
   rootFrame->Init(presContext, aDocElement, parentFrame,
                   rootPseudoStyle, nsnull);
   
-  if (!isPaginated || isPrintPreview) {
+  if (isScrollable) {
-    if (isScrollable) {
+    FinishBuildingScrollFrame(parentFrame, rootFrame);
-      FinishBuildingScrollFrame(parentFrame, rootFrame);
+  }
-
-      // Don't set the root as the primary frame for aDocElement.  Its 
-      // primary frame will be set in ConstructDocElementFrame.
-    } else { // if not scrollable
-      if (!isXUL) { // if not XUL
-        parentFrame->SetInitialChildList(presContext, nsnull, rootFrame);
-      }
-    }
-  } 
   
   if (isPaginated) { // paginated
     // Create the first page
@@ -4665,9 +4656,7 @@ nsCSSFrameConstructor::ConstructRootFrame(nsIContent*     aDocElement,
   
   *aNewFrame = viewportFrame;
 
-
+  return NS_OK;
-
-  return NS_OK;  
 }
 
 nsresult

layout/xul/base/src/nsListBoxBodyFrame.cpp

@@ -236,11 +236,7 @@ nsListBoxBodyFrame::Init(nsPresContext* aPresContext, nsIContent* aContent,
 
   mOnePixel = aPresContext->IntScaledPixelsToTwips(1);
   
-  nsIFrame* box = aParent->GetParent();
+  nsIScrollableFrame* scrollFrame = nsLayoutUtils::GetScrollableFrameFor(this);
-  if (!box)
-    return rv;
-
-  nsCOMPtr<nsIScrollableFrame> scrollFrame(do_QueryInterface(box));
   if (!scrollFrame)
     return rv;
 
@@ -264,7 +260,6 @@ nsListBoxBodyFrame::Init(nsPresContext* aPresContext, nsIContent* aContent,
   fm->GetHeight(mRowHeight);
 
   return rv;
-
 }
 
 NS_IMETHODIMP
@@ -344,6 +339,7 @@ nsListBoxBodyFrame::NeedsRecalc()
 {
   mStringWidth = -1;
   return nsBoxFrame::NeedsRecalc();
+  printf("*** nsListBoxBodyFrame::NeedsRecalc %p\n", this);
 }
 
 /////////// nsBox ///////////////
@@ -393,6 +389,10 @@ nsListBoxBodyFrame::GetPrefSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize
   nsresult rv = nsBoxFrame::GetPrefSize(aBoxLayoutState, aSize);
 
   PRInt32 size = GetFixedRowSize();
+  nsIBox* box = nsnull;
+  GetChildBox(&box);
+  printf("nsListBoxBodyFrame::GetPrefSize %p childbox=%p rowsize=%d height=%d newHeight=%d\n", this,
+         box, size, aSize.height, size*GetRowHeightTwips());
   if (size > -1)
     aSize.height = size*GetRowHeightTwips();
    
@@ -713,6 +713,8 @@ nsListBoxBodyFrame::GetFixedRowSize()
 void
 nsListBoxBodyFrame::SetRowHeight(nscoord aRowHeight)
 { 
+  printf("*** Setting rowheight on %p to %d (current %d)\n", this,
+         aRowHeight, mRowHeight);
   if (aRowHeight > mRowHeight) { 
     mRowHeight = aRowHeight;
     
@@ -737,20 +739,16 @@ nsListBoxBodyFrame::SetRowHeight(nscoord aRowHeight)
     // so we can create or destory rows as needed
     mRowHeightWasSet = PR_TRUE;
     PostReflowCallback();
-  } 
+  }
 }
 
 nscoord
 nsListBoxBodyFrame::GetAvailableHeight()
 {
-  nsIBox* box;
+  nsIScrollableFrame* scrollFrame
-  GetParentBox(&box);
+    = nsLayoutUtils::GetScrollableFrameFor(this);
-  if (!box)
+  nsIScrollableView* scrollView = scrollFrame->GetScrollableView();
-    return 0;
+  return scrollView->View()->GetBounds().height;
-
-  nsRect contentRect;
-  box->GetContentRect(contentRect);
-  return contentRect.height;
 }
 
 nscoord
@@ -987,18 +985,8 @@ nsListBoxBodyFrame::GetSmoother()
 void
 nsListBoxBodyFrame::VerticalScroll(PRInt32 aPosition)
 {
-  nsIBox* box;
+  nsIScrollableFrame* scrollFrame
-  GetParentBox(&box);
+    = nsLayoutUtils::GetScrollableFrameFor(this);
-  if (!box)
-    return;
-
-  box->GetParentBox(&box);
-  if (!box)
-    return;
-
-  nsCOMPtr<nsIScrollableFrame> scrollFrame(do_QueryInterface(box));
-  if (!scrollFrame)
-    return;
 
   nsPoint scrollPosition = scrollFrame->GetScrollPosition();
  

layout/xul/base/src/nsListBoxObject.cpp

@@ -46,6 +46,7 @@
 #include "nsIDOMElement.h"
 #include "nsIDOMNodeList.h"
 #include "nsXULAtoms.h"
+#include "nsIScrollableFrame.h"
 
 class nsListBoxObject : public nsIListBoxObject, public nsBoxObject
 {
@@ -227,14 +228,13 @@ nsListBoxObject::GetListBoxBody()
   mPresShell->GetPrimaryFrameFor(content, &frame);
   if (!frame)
      return nsnull;
-
+  nsIScrollableFrame* scrollFrame;
-  // this frame will be a nsScrollBoxFrame
+  CallQueryInterface(frame, &scrollFrame);
-  nsIFrame* scrollPort = frame->GetFirstChild(nsnull);
+  if (!scrollFrame)
-  if (!scrollPort)
+    return nsnull;
-     return nsnull;
 
   // this frame will be the one we want
-  nsIFrame* yeahBaby = scrollPort->GetFirstChild(nsnull);
+  nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
   if (!yeahBaby)
      return nsnull;