Change FlushPendingNotifications to have more granularity and update callers to

only flush the things they really need flushed.  Bug 144072, r+sr=jst

content/base/public/mozFlushType.h

@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Boris Zbarsky.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+#ifndef mozFlushType_h___
+#define mozFlushType_h___
+
+/**
+ * This is the enum used by nsIDocument::FlushPendingNotifications to
+ * decide what to flush.
+ */
+enum mozFlushType {
+  Flush_Content           = 0x1,   /* flush the content model construction */
+  Flush_SinkNotifications = 0x2,   /* flush the frame model construction */
+  Flush_StyleReresolves   = 0x4,   /* flush style reresolution */
+  Flush_OnlyReflow        = 0x8,   /* flush reflows */
+  Flush_OnlyPaint         = 0x10,  /* flush painting */
+  Flush_Frames            = (Flush_Content | Flush_SinkNotifications),
+  Flush_ContentAndNotify  = (Flush_Content | Flush_SinkNotifications),
+  Flush_Style             = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves),
+  Flush_Layout            = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves | Flush_OnlyReflow),
+  Flush_Display           = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves | Flush_OnlyReflow |
+                             Flush_OnlyPaint)
+};
+
+#endif /* mozFlushType_h___ */

content/base/public/nsIDocument.h

@@ -52,6 +52,7 @@
 #include "nsILoadGroup.h"
 #include "nsReadableUtils.h"
 #include "nsCRT.h"
+#include "mozFlushType.h"
 
 class nsIAtom;
 class nsIContent;
@@ -510,8 +511,11 @@ public:
                                   PRUint32 aFlags,
                                   nsEventStatus* aEventStatus) = 0;
 
-  virtual void FlushPendingNotifications(PRBool aFlushReflows=PR_TRUE,
+  /**
-                                         PRBool aUpdateViews=PR_FALSE) = 0;
+   * Flush notifications for this document and its parent documents
+   * (since those may affect the layout of this one).
+   */
+  virtual void FlushPendingNotifications(mozFlushType aType) = 0;
 
   PRInt32 GetAndIncrementContentID()
   {

content/base/src/mozSanitizingSerializer.h

@@ -105,7 +105,7 @@ public:
   NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode)
                                                     { return NS_OK; }
   NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode);
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset);
   NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) { return NS_OK; }
 

content/base/src/nsContentList.cpp

@@ -429,8 +429,8 @@ nsContentList::Item(PRUint32 aIndex, PRBool aDoFlush)
   CheckDocumentExistence();
 
   if (mDocument && aDoFlush) {
-    // Flush pending content changes Bug 4891
+    // Flush pending content changes Bug 4891.
-    mDocument->FlushPendingNotifications(PR_FALSE);
+    mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
   }
 
   if (mState != LIST_UP_TO_DATE)
@@ -963,7 +963,8 @@ void
 nsContentList::BringSelfUpToDate(PRBool aDoFlush)
 {
   if (mDocument && aDoFlush) {
-    mDocument->FlushPendingNotifications(PR_FALSE); // Flush pending content changes Bug 4891
+    // Flush pending content changes Bug 4891.
+    mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
   }
 
   if (mState != LIST_UP_TO_DATE)

content/base/src/nsContentSink.cpp

@@ -863,7 +863,7 @@ nsContentSink::ScrollToRef(PRBool aReallyScroll)
     if (shell) {
       // Scroll to the anchor
       if (aReallyScroll) {
-        shell->FlushPendingNotifications(PR_FALSE);
+        shell->FlushPendingNotifications(Flush_Layout);
       }
 
       // Check an empty string which might be caused by the UTF-8 conversion

content/base/src/nsDocument.cpp

@@ -3906,10 +3906,11 @@ nsDocument::CreateEventGroup(nsIDOMEventGroup **aInstancePtrResult)
 }
 
 void
-nsDocument::FlushPendingNotifications(PRBool aFlushReflows,
+nsDocument::FlushPendingNotifications(mozFlushType aType)
-                                      PRBool aUpdateViews)
 {
-  if (!aFlushReflows || !mScriptGlobalObject) {
+  if (aType == (aType & (Flush_Content | Flush_SinkNotifications)) ||
+      !mScriptGlobalObject) {
+    // Nothing to do here
     return;
   }
 
@@ -3935,8 +3936,7 @@ nsDocument::FlushPendingNotifications(PRBool aFlushReflows,
       if (doc) {
         // If we have a parent we must flush the parent too to ensure
         // that our container is reflown if its size was changed.
-
+        doc->FlushPendingNotifications(aType);
-        doc->FlushPendingNotifications(aFlushReflows, aUpdateViews);
       }
     }
   }
@@ -3948,7 +3948,7 @@ nsDocument::FlushPendingNotifications(PRBool aFlushReflows,
       NS_STATIC_CAST(nsIPresShell*, mPresShells[i]);
 
     if (shell) {
-      shell->FlushPendingNotifications(aUpdateViews);
+      shell->FlushPendingNotifications(aType);
     }
   }
 }

content/base/src/nsDocument.h

@@ -397,8 +397,7 @@ public:
   virtual void StyleRuleRemoved(nsIStyleSheet* aStyleSheet,
                                 nsIStyleRule* aStyleRule);
 
-  virtual void FlushPendingNotifications(PRBool aFlushReflows = PR_TRUE,
+  virtual void FlushPendingNotifications(mozFlushType aType);
-                                         PRBool aUpdateViews = PR_FALSE);
   virtual void AddReference(void *aKey, nsISupports *aReference);
   virtual already_AddRefed<nsISupports> RemoveReference(void *aKey);
   virtual nsIScriptEventManager* GetScriptEventManager();

content/base/src/nsDocumentViewer.cpp

@@ -656,7 +656,7 @@ DocumentViewerImpl::InitPresentationStuff(PRBool aDoInitialReflow)
     // Note that we are flushing before we add mPresShell as an observer
     // to avoid bogus notifications.
 
-    mDocument->FlushPendingNotifications(PR_FALSE);
+    mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
   }
 
   mPresShell->BeginObservingDocument();
@@ -935,9 +935,7 @@ DocumentViewerImpl::LoadComplete(nsresult aStatus)
   static PRBool forcePaint
     = PR_GetEnv("MOZ_FORCE_PAINT_AFTER_ONLOAD") != nsnull;
   if (forcePaint) {
-    if (mPresShell) {
+    mDocument->FlushPendingNotifications(Flush_Display);
-      mPresShell->FlushPendingNotifications(PR_TRUE);
-    }
     nsIURI *uri = mDocument->GetDocumentURI();
     nsCAutoString spec;
     if (uri) {

content/base/src/nsPlainTextSerializer.h

@@ -101,7 +101,7 @@ public:
   NS_IMETHOD AddComment(const nsIParserNode& aNode) { return NS_OK; }
   NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode) { return NS_OK; }
   NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode) { return NS_OK; }
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
   NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) { return NS_OK; }
 

content/events/src/nsEventStateManager.cpp

@@ -503,6 +503,7 @@ nsEventStateManager::PreHandleEvent(nsIPresContext* aPresContext,
     GenerateMouseEnterExit(aPresContext, (nsGUIEvent*)aEvent);
     // Flush reflows and invalidates to eliminate flicker when both a reflow
     // and visual change occur in an event callback. See bug  #36849
+    // XXXbz eeeew.  Why not fix viewmanager to flush reflows before painting??
     FlushPendingEvents(aPresContext); 
     break;
   case NS_MOUSE_EXIT:
@@ -4641,7 +4642,8 @@ nsEventStateManager::FlushPendingEvents(nsIPresContext* aPresContext)
   NS_PRECONDITION(nsnull != aPresContext, "nsnull ptr");
   nsIPresShell *shell = aPresContext->GetPresShell();
   if (shell) {
-    shell->FlushPendingNotifications(PR_FALSE);
+    // This is not flushing _Display because of the mess that is bug 36849
+    shell->FlushPendingNotifications(Flush_Layout);
     nsIViewManager* viewManager = shell->GetViewManager();
     if (viewManager) {
       viewManager->FlushPendingInvalidates();

content/html/content/src/nsGenericHTMLElement.cpp

@@ -582,7 +582,7 @@ nsGenericHTMLElement::GetOffsetRect(nsRect& aRect, nsIContent** aOffsetParent)
   }
 
   // Flush all pending notifications so that our frames are uptodate
-  mDocument->FlushPendingNotifications();
+  mDocument->FlushPendingNotifications(Flush_Layout);
 
   // Get the Frame for our content
   nsIFrame* frame = nsnull;
@@ -933,7 +933,7 @@ nsGenericHTMLElement::GetScrollInfo(nsIScrollableView **aScrollableView,
     return;
   }
 
-  mDocument->FlushPendingNotifications(PR_TRUE, PR_FALSE);
+  mDocument->FlushPendingNotifications(Flush_Layout);
 
   // Get the presentation shell
   nsIPresShell *presShell = mDocument->GetShellAt(0);
@@ -1239,7 +1239,7 @@ nsGenericHTMLElement::ScrollIntoView(PRBool aTop)
   }
 
   // Now flush to make sure things are up to date
-  presShell->FlushPendingNotifications(PR_FALSE);
+  mDocument->FlushPendingNotifications(Flush_Layout);
   
   // Get the primary frame for this element
   nsIFrame *frame = nsnull;
@@ -2176,7 +2176,7 @@ nsGenericHTMLElement::GetPrimaryFrameFor(nsIContent* aContent,
   if (aFlushContent) {
     // Cause a flush of content, so we get up-to-date frame
     // information
-    aDocument->FlushPendingNotifications(PR_FALSE);
+    aDocument->FlushPendingNotifications(Flush_Frames);
   }
 
   // Get presentation shell 0

content/html/content/src/nsHTMLAnchorElement.cpp

@@ -221,7 +221,7 @@ nsHTMLAnchorElement::SetFocus(nsIPresContext* aPresContext)
 
     // Make sure the presentation is up-to-date
     if (mDocument) {
-      mDocument->FlushPendingNotifications();
+      mDocument->FlushPendingNotifications(Flush_Layout);
     }
 
     nsIPresShell *presShell = aPresContext->GetPresShell();

content/html/content/src/nsHTMLAreaElement.cpp

@@ -202,7 +202,7 @@ nsHTMLAreaElement::SetFocus(nsIPresContext* aPresContext)
     
   // Make sure the presentation is up-to-date    
   if (mDocument) {
-    mDocument->FlushPendingNotifications();
+    mDocument->FlushPendingNotifications(Flush_Layout);
   }
 
   nsIPresShell *presShell = aPresContext->GetPresShell();

content/html/content/src/nsHTMLBodyElement.cpp

@@ -373,19 +373,11 @@ nsHTMLBodyElement::GetBgColor(nsAString& aBgColor)
   // If we don't have an attribute, find the actual color used for
   // (generally from the user agent style sheet) for compatibility
   if (rv == NS_CONTENT_ATTR_NOT_THERE) {
-    // XXX This should just use nsGenericHTMLElement::GetPrimaryFrame()
     if (mDocument) {
-      // Make sure the presentation is up-to-date
+      // Make sure the style is up-to-date, since we need it
-      mDocument->FlushPendingNotifications();
+      mDocument->FlushPendingNotifications(Flush_Style);
-    }
 
-    nsCOMPtr<nsIPresContext> context;
+      nsIFrame* frame = GetPrimaryFrameFor(this, mDocument, PR_FALSE);
-    GetPresContext(this, getter_AddRefs(context));
-
-    if (context) {
-      nsIFrame* frame;
-      rv = context->PresShell()->GetPrimaryFrameFor(this, &frame);
-      NS_ENSURE_SUCCESS(rv, rv);
     
       if (frame) {
         bgcolor = frame->GetStyleBackground()->mBackgroundColor;

content/html/content/src/nsHTMLFormElement.cpp

@@ -765,7 +765,7 @@ nsHTMLFormElement::DoSubmitOrReset(nsIPresContext* aPresContext,
 
   // Make sure the presentation is up-to-date
   if (mDocument) {
-    mDocument->FlushPendingNotifications();
+    mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
   }
 
   // JBK Don't get form frames anymore - bug 34297

content/html/content/src/nsHTMLImageElement.cpp

@@ -285,8 +285,8 @@ nsHTMLImageElement::GetXY()
     return point;
   }
 
-  // Flush all pending notifications so that our frames are uptodate
+  // Flush all pending notifications so that our frames are laid out correctly
-  mDocument->FlushPendingNotifications();
+  mDocument->FlushPendingNotifications(Flush_Layout);
 
   // Get the Frame for this image
   nsIFrame* frame = nsnull;
@@ -339,7 +339,7 @@ nsHTMLImageElement::GetWidthHeight()
     // Flush all pending notifications so that our frames are up to date.
     // If we're not in a document, we don't have a frame anyway, so we
     // don't care.
-    mDocument->FlushPendingNotifications();
+    mDocument->FlushPendingNotifications(Flush_Layout);
   }
 
   nsIImageFrame* imageFrame;

content/html/document/src/nsHTMLContentSink.cpp

@@ -230,7 +230,7 @@ public:
   NS_IMETHOD WillInterrupt(void);
   NS_IMETHOD WillResume(void);
   NS_IMETHOD SetParser(nsIParser* aParser);
-  NS_IMETHOD FlushPendingNotifications();
+  NS_IMETHOD_(void) FlushContent(PRBool aNotify);
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset);
 
   // nsIHTMLContentSink
@@ -727,7 +727,7 @@ public:
     return FlushText(aDidFlush, PR_TRUE);
   }
 
-  nsresult FlushTags(PRBool aNotify = PR_TRUE);
+  nsresult FlushTags(PRBool aNotify);
 
   PRBool   IsCurrentContainer(nsHTMLTag mType);
   PRBool   IsAncestorContainer(nsHTMLTag mType);
@@ -4419,22 +4419,14 @@ HTMLContentSink::ProcessSTYLETag(const nsIParserNode& aNode)
   return rv;
 }
 
-NS_IMETHODIMP
+void
-HTMLContentSink::FlushPendingNotifications()
+HTMLContentSink::FlushContent(PRBool aNotify)
 {
-  nsresult result = NS_OK;
   // Only flush tags if we're not doing the notification ourselves
-  // (since we aren't reentrant) and if we're in a script (since we
+  // (since we aren't reentrant)
-  // only care to flush if this is done via script).
-  //
-  // Bug 4891: Also flush outside of <script> tags - if script is
-  // executing after the page has finished loading, and a
-  // document.write occurs, we might need this flush.
   if (mCurrentContext && !mInNotification) {
-    result = mCurrentContext->FlushTags();
+    mCurrentContext->FlushTags(aNotify);
   }
-
-  return result;
 }
 
 NS_IMETHODIMP

content/html/document/src/nsHTMLDocument.cpp

@@ -1299,13 +1299,13 @@ nsHTMLDocument::AttributeChanged(nsIContent* aContent, PRInt32 aNameSpaceID,
 }
 
 void
-nsHTMLDocument::FlushPendingNotifications(PRBool aFlushReflows,
+nsHTMLDocument::FlushPendingNotifications(mozFlushType aType)
-                                          PRBool aUpdateViews)
 {
+  if (aType & Flush_Content) {
     // Determine if it is safe to flush the sink
     // by determining if it safe to flush all the presshells.
     PRBool isSafeToFlush = PR_TRUE;
-  if (aFlushReflows) {
+    if (aType & Flush_SinkNotifications) {
       PRInt32 i = 0, n = mPresShells.Count();
       while ((i < n) && (isSafeToFlush)) {
         nsCOMPtr<nsIPresShell> shell =
@@ -1319,18 +1319,15 @@ nsHTMLDocument::FlushPendingNotifications(PRBool aFlushReflows,
     }
 
     if (isSafeToFlush && mParser) {
-    nsCOMPtr<nsIContentSink> sink;
+      nsCOMPtr<nsIContentSink> sink = mParser->GetContentSink();
-
-    // XXX Ack! Parser doesn't addref sink before passing it back
-    sink = mParser->GetContentSink();
       if (sink) {
-      nsresult rv = sink->FlushPendingNotifications();
+        PRBool notify = ((aType & Flush_SinkNotifications) != 0);
-      if (NS_FAILED(rv))
+        sink->FlushContent(notify);
-        return;
+      }
     }
   }
   
-  nsDocument::FlushPendingNotifications(aFlushReflows, aUpdateViews);
+  nsDocument::FlushPendingNotifications(aType);
 }
 
 PRBool
@@ -2210,7 +2207,7 @@ nsHTMLDocument::Close()
     // handler of the frameset fires before the frames get reflowed
     // and loaded.  That is the long explanation for why we need this
     // one line of code here!
-    FlushPendingNotifications();
+    FlushPendingNotifications(Flush_Layout);
 
     // Remove the wyciwyg channel request from the document load group
     // that we added in OpenCommon().  If all other requests between
@@ -2543,7 +2540,7 @@ nsHTMLDocument::GetPixelDimensions(nsIPresShell* aShell,
 {
   *aWidth = *aHeight = 0;
 
-  FlushPendingNotifications();
+  FlushPendingNotifications(Flush_Layout);
 
   // Find the <body> element: this is what we'll want to use for the
   // document's width and height values.
@@ -3061,6 +3058,10 @@ nsHTMLDocument::UpdateNameTableEntry(const nsAString& aName,
     return NS_OK;
   }
 
+  // NOTE: this indexof is absolutely needed, since we don't flush
+  // content notifications when we do document.foo resolution.  So
+  // aContent may be in our list already and just now getting notified
+  // for!
   if (list->IndexOf(aContent, PR_FALSE) < 0) {
     list->AppendElement(aContent);
   }
@@ -3304,7 +3305,7 @@ nsHTMLDocument::ResolveName(const nsAString& aName,
   // table changes when we flush.
   PRUint32 generation = mIdAndNameHashTable.generation;
   
-  FlushPendingNotifications(PR_FALSE);
+  FlushPendingNotifications(Flush_Content);
 
   if (generation != mIdAndNameHashTable.generation) {
     // Table changed, so the entry pointer is no longer valid; look up the

content/html/document/src/nsHTMLDocument.h

@@ -136,8 +136,7 @@ public:
                                    PRInt32 aNameSpaceID,
                                    nsIAtom* aAttribute);
 
-  virtual void FlushPendingNotifications(PRBool aFlushReflows = PR_TRUE,
+  virtual void FlushPendingNotifications(mozFlushType aType);
-                                         PRBool aUpdateViews = PR_FALSE);
 
   virtual PRBool IsCaseSensitive();
 

content/html/document/src/nsHTMLFragmentContentSink.cpp

@@ -80,7 +80,7 @@ public:
   NS_IMETHOD WillInterrupt(void);
   NS_IMETHOD WillResume(void);
   NS_IMETHOD SetParser(nsIParser* aParser);
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
 
   // nsIHTMLContentSink

content/html/document/src/nsIHTMLDocument.h

@@ -106,6 +106,8 @@ public:
    * Called to get a better count of forms than document.forms can provide
    * without calling FlushPendingNotifications (bug 138892).
    */
+  // XXXbz is this still needed now that we can flush just content,
+  // not the rest?
   virtual PRInt32 GetNumFormsSynchronous() = 0;
   
   virtual PRBool IsWriting() = 0;

content/html/style/src/nsComputedDOMStyle.cpp

@@ -271,6 +271,11 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsAString& aPropertyName,
 
   NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
 
+  nsIDocument* document = mContent->GetDocument();
+  if (document) {
+    document->FlushPendingNotifications(Flush_Style);
+  }
+
   nsIFrame *frame = nsnull;
   presShell->GetPrimaryFrameFor(mContent, &frame);
 
@@ -2873,7 +2878,7 @@ nsComputedDOMStyle::FlushPendingReflows()
   // Flush all pending notifications so that our frames are up to date
   nsIDocument* document = mContent->GetDocument();
   if (document) {
-    document->FlushPendingNotifications();
+    document->FlushPendingNotifications(Flush_Layout);
   }
 }
 

content/shared/public/Makefile.in

@@ -59,6 +59,7 @@ nsCSSKeywords.h \
 nsCSSPropList.h \
 nsCSSProperty.h \
 nsCSSProps.h \
+mozFlushType.h \
 nsFrameManager.h \
 nsFrameManagerBase.h \
 nsHTMLAtomList.h \

content/shared/public/mozFlushType.h

@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Boris Zbarsky.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+#ifndef mozFlushType_h___
+#define mozFlushType_h___
+
+/**
+ * This is the enum used by nsIDocument::FlushPendingNotifications to
+ * decide what to flush.
+ */
+enum mozFlushType {
+  Flush_Content           = 0x1,   /* flush the content model construction */
+  Flush_SinkNotifications = 0x2,   /* flush the frame model construction */
+  Flush_StyleReresolves   = 0x4,   /* flush style reresolution */
+  Flush_OnlyReflow        = 0x8,   /* flush reflows */
+  Flush_OnlyPaint         = 0x10,  /* flush painting */
+  Flush_Frames            = (Flush_Content | Flush_SinkNotifications),
+  Flush_ContentAndNotify  = (Flush_Content | Flush_SinkNotifications),
+  Flush_Style             = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves),
+  Flush_Layout            = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves | Flush_OnlyReflow),
+  Flush_Display           = (Flush_Content | Flush_SinkNotifications |
+                             Flush_StyleReresolves | Flush_OnlyReflow |
+                             Flush_OnlyPaint)
+};
+
+#endif /* mozFlushType_h___ */

content/svg/content/src/nsSVGSVGElement.cpp

@@ -1118,7 +1118,7 @@ void nsSVGSVGElement::GetScreenPosition(PRInt32 &x, PRInt32 &y)
   }
    
   // Flush all pending notifications so that our frames are uptodate
-  presShell->FlushPendingNotifications(PR_FALSE);
+  mDocument->FlushPendingNotifications(Flush_Layout);
     
   nsIFrame* frame;
   presShell->GetPrimaryFrameFor(this, &frame);

content/xbl/src/nsXBLResourceLoader.cpp

@@ -251,8 +251,8 @@ nsXBLResourceLoader::NotifyBoundElements()
       nsCOMPtr<nsIDocument> doc = content->GetDocument();
     
       if (doc) {
-        // Flush first
+        // Flush first to make sure we can get the frame for content
-        doc->FlushPendingNotifications();
+        doc->FlushPendingNotifications(Flush_Frames);
 
         // Notify
         nsCOMPtr<nsIContent> parent = content->GetParent();
@@ -286,7 +286,8 @@ nsXBLResourceLoader::NotifyBoundElements()
         }
 
         // Flush again
-        doc->FlushPendingNotifications();
+        // XXXbz why is this needed?
+        doc->FlushPendingNotifications(Flush_ContentAndNotify);
       }
     }
   }

content/xbl/src/nsXBLService.cpp

@@ -384,7 +384,7 @@ nsXBLStreamListener::Load(nsIDOMEvent* aEvent)
       nsXBLBindingRequest* req = (nsXBLBindingRequest*)mBindingRequests.ElementAt(0);
       nsIDocument* document = req->mBoundElement->GetDocument();
       if (document)
-        document->FlushPendingNotifications();
+        document->FlushPendingNotifications(Flush_ContentAndNotify);
     }
 
     // Remove ourselves from the set of pending docs.
@@ -429,11 +429,12 @@ nsXBLStreamListener::Load(nsIDOMEvent* aEvent)
     // All reqs normally have the same binding doc.  Force a synchronous
     // reflow on this binding doc to deal with the fact that iframes
     // don't construct or load their subdocs until they get a reflow.
+    // XXXbz this is still needed for <xul:iframe>.  We need to fix that.
     if (count > 0) {
       nsXBLBindingRequest* req = (nsXBLBindingRequest*)mBindingRequests.ElementAt(0);
       nsIDocument* document = req->mBoundElement->GetDocument();
       if (document)
-        document->FlushPendingNotifications();
+        document->FlushPendingNotifications(Flush_Layout);
     }
   }
   

content/xml/document/src/nsLoadSaveContentSink.cpp

@@ -121,10 +121,10 @@ nsLoadSaveContentSink::SetParser(nsIParser* aParser)
   return mBaseSink->SetParser(aParser);
 }
 
-NS_IMETHODIMP
+void
-nsLoadSaveContentSink::FlushPendingNotifications(void)
+nsLoadSaveContentSink::FlushContent(PRBool aNotify)
 {
-  return mBaseSink->FlushPendingNotifications();
+  mBaseSink->FlushContent(aNotify);
 }
 
 NS_IMETHODIMP

content/xml/document/src/nsLoadSaveContentSink.h

@@ -74,7 +74,7 @@ public:
   NS_IMETHOD WillInterrupt(void);
   NS_IMETHOD WillResume(void);
   NS_IMETHOD SetParser(nsIParser* aParser);  
-  NS_IMETHOD FlushPendingNotifications(void);
+  virtual void FlushContent(PRBool aNotify);
   NS_IMETHOD SetDocumentCharset(nsAString& aCharset);
 
 private:

content/xml/document/src/nsXMLContentSink.h

@@ -85,7 +85,7 @@ public:
   NS_IMETHOD WillInterrupt(void);
   NS_IMETHOD WillResume(void);
   NS_IMETHOD SetParser(nsIParser* aParser);  
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset);
 
   // nsITransformObserver

content/xul/document/src/nsXULContentSink.cpp

@@ -133,7 +133,7 @@ public:
     NS_IMETHOD WillInterrupt(void);
     NS_IMETHOD WillResume(void);
     NS_IMETHOD SetParser(nsIParser* aParser);  
-    NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+    virtual void FlushContent(PRBool aNotify) { }
     NS_IMETHOD SetDocumentCharset(nsACString& aCharset);
 
     // nsIXULContentSink

content/xul/document/src/nsXULDocument.cpp

@@ -1585,7 +1585,7 @@ nsXULDocument::GetPixelDimensions(nsIPresShell* aShell, PRInt32* aWidth,
     nsSize size;
     nsIFrame* frame;
 
-    FlushPendingNotifications();
+    FlushPendingNotifications(Flush_Layout);
 
     result = aShell->GetPrimaryFrameFor(mRootContent, &frame);
     if (NS_SUCCEEDED(result) && frame) {
@@ -2167,7 +2167,8 @@ nsXULDocument::StartLayout(void)
         // This is done because iframes don't load their subdocs until
         // they get reflowed.  If we reflow asynchronously, our onload
         // will fire too early. -- hyatt
-        FlushPendingNotifications();
+        // XXXbz this is still needed for <xul:iframe>.  We need to fix that.
+        FlushPendingNotifications(Flush_Layout);
 
         // Start observing the document _after_ we do the initial
         // reflow. Otherwise, we'll get into an trouble trying to

dom/src/base/nsDOMClassInfo.cpp

@@ -5879,7 +5879,9 @@ nsHTMLExternalObjSH::GetPluginInstance(nsIXPConnectWrappedNative *wrapper,
     return NS_OK;
   }
 
-  doc->FlushPendingNotifications();
+  // Have to flush layout, since plugin instance instantiation
+  // currently happens in reflow!  That's just uncool.
+  doc->FlushPendingNotifications(Flush_Layout);
 
   // See if we have a frame.
   nsIPresShell *shell = doc->GetShellAt(0);

dom/src/base/nsDOMWindowList.cpp

@@ -96,7 +96,7 @@ nsDOMWindowList::GetLength(PRUint32* aLength)
     nsCOMPtr<nsIDocument> doc(do_QueryInterface(domdoc));
 
     if (doc) {
-      doc->FlushPendingNotifications();
+      doc->FlushPendingNotifications(Flush_ContentAndNotify);
     }
   }
 
@@ -129,7 +129,7 @@ nsDOMWindowList::Item(PRUint32 aIndex, nsIDOMWindow** aReturn)
     nsCOMPtr<nsIDocument> doc = do_QueryInterface(domdoc);
 
     if (doc) {
-      doc->FlushPendingNotifications();
+      doc->FlushPendingNotifications(Flush_ContentAndNotify);
     }
   }
 
@@ -166,7 +166,7 @@ nsDOMWindowList::NamedItem(const nsAString& aName, nsIDOMWindow** aReturn)
     nsCOMPtr<nsIDocument> doc(do_QueryInterface(domdoc));
 
     if (doc) {
-      doc->FlushPendingNotifications();
+      doc->FlushPendingNotifications(Flush_ContentAndNotify);
     }
   }
 

dom/src/base/nsGlobalWindow.cpp

@@ -1537,7 +1537,14 @@ GlobalWindowImpl::SetName(const nsAString& aName)
 NS_IMETHODIMP
 GlobalWindowImpl::GetInnerWidth(PRInt32* aInnerWidth)
 {
-  FlushPendingNotifications(PR_TRUE);
+  // If we're a subframe, make sure our size is up to date.  It's OK that this
+  // crosses the content/chrome boundary, since chrome can have pending reflows
+  // too.
+  GlobalWindowImpl* parent = NS_STATIC_CAST(GlobalWindowImpl*,
+                                            GetPrivateParent());
+  if (parent) {
+    parent->FlushPendingNotifications(Flush_Layout);
+  }
 
   nsCOMPtr<nsIBaseWindow> docShellWin(do_QueryInterface(mDocShell));
   *aInnerWidth = 0;
@@ -1589,7 +1596,14 @@ GlobalWindowImpl::SetInnerWidth(PRInt32 aInnerWidth)
 NS_IMETHODIMP
 GlobalWindowImpl::GetInnerHeight(PRInt32* aInnerHeight)
 {
-  FlushPendingNotifications(PR_TRUE);
+  // If we're a subframe, make sure our size is up to date.  It's OK that this
+  // crosses the content/chrome boundary, since chrome can have pending reflows
+  // too.
+  GlobalWindowImpl* parent = NS_STATIC_CAST(GlobalWindowImpl*,
+                                            GetPrivateParent());
+  if (parent) {
+    parent->FlushPendingNotifications(Flush_Layout);
+  }
 
   nsCOMPtr<nsIBaseWindow> docShellWin(do_QueryInterface(mDocShell));
   *aInnerHeight = 0;
@@ -1646,7 +1660,11 @@ GlobalWindowImpl::GetOuterWidth(PRInt32* aOuterWidth)
   GetTreeOwner(getter_AddRefs(treeOwnerAsWin));
   NS_ENSURE_TRUE(treeOwnerAsWin, NS_ERROR_FAILURE);
 
-  FlushPendingNotifications(PR_TRUE);
+  GlobalWindowImpl* rootWindow = NS_STATIC_CAST(GlobalWindowImpl*,
+                                                GetPrivateRoot());
+  if (rootWindow) {
+    rootWindow->FlushPendingNotifications(Flush_Layout);
+  }
   PRInt32 notused;
   NS_ENSURE_SUCCESS(treeOwnerAsWin->GetSize(aOuterWidth, &notused),
                     NS_ERROR_FAILURE);
@@ -1689,7 +1707,11 @@ GlobalWindowImpl::GetOuterHeight(PRInt32* aOuterHeight)
   GetTreeOwner(getter_AddRefs(treeOwnerAsWin));
   NS_ENSURE_TRUE(treeOwnerAsWin, NS_ERROR_FAILURE);
 
-  FlushPendingNotifications(PR_TRUE);
+  GlobalWindowImpl* rootWindow = NS_STATIC_CAST(GlobalWindowImpl*,
+                                                GetPrivateRoot());
+  if (rootWindow) {
+    rootWindow->FlushPendingNotifications(Flush_Layout);
+  }
 
   PRInt32 notused;
   NS_ENSURE_SUCCESS(treeOwnerAsWin->GetSize(&notused, aOuterHeight),
@@ -1862,7 +1884,11 @@ GlobalWindowImpl::CheckSecurityLeftAndTop(PRInt32* aLeft, PRInt32* aTop)
     PRInt32 screenLeft, screenTop, screenWidth, screenHeight;
     PRInt32 winLeft, winTop, winWidth, winHeight;
 
-    FlushPendingNotifications(PR_TRUE);
+    GlobalWindowImpl* rootWindow = NS_STATIC_CAST(GlobalWindowImpl*,
+                                                  GetPrivateRoot());
+    if (rootWindow) {
+      rootWindow->FlushPendingNotifications(Flush_Layout);
+    }
 
     // Get the window size
     nsCOMPtr<nsIBaseWindow> treeOwner;
@@ -2140,7 +2166,7 @@ GlobalWindowImpl::EnsureReflowFlushAndPaint()
   nsCOMPtr<nsIDocument> doc(do_QueryInterface(mDocument));
 
   if (doc) {
-    doc->FlushPendingNotifications(PR_TRUE, PR_FALSE);
+    doc->FlushPendingNotifications(Flush_Layout);
   }
 
   // Unsuppress painting.
@@ -3390,7 +3416,7 @@ GlobalWindowImpl::GetFrames(nsIDOMWindow** aFrames)
   *aFrames = this;
   NS_ADDREF(*aFrames);
 
-  FlushPendingNotifications(PR_FALSE);
+  FlushPendingNotifications(Flush_ContentAndNotify);
 
   return NS_OK;
 }
@@ -4184,15 +4210,15 @@ GlobalWindowImpl::GetPrivateParent()
   if (NS_STATIC_CAST(nsIDOMWindow *, this) == parent.get()) {
     nsCOMPtr<nsIContent> chromeElement(do_QueryInterface(mChromeEventHandler));
     if (!chromeElement)
-      return NS_OK;             // This is ok, just means a null parent.
+      return nsnull;             // This is ok, just means a null parent.
 
     nsIDocument* doc = chromeElement->GetDocument();
     if (!doc)
-      return NS_OK;             // This is ok, just means a null parent.
+      return nsnull;             // This is ok, just means a null parent.
 
     nsIScriptGlobalObject *globalObject = doc->GetScriptGlobalObject();
     if (!globalObject)
-      return NS_OK;             // This is ok, just means a null parent.
+      return nsnull;             // This is ok, just means a null parent.
 
     parent = do_QueryInterface(globalObject);
   }
@@ -5429,7 +5455,7 @@ GlobalWindowImpl::GetScrollInfo(nsIScrollableView **aScrollableView,
 
   // Flush pending notifications so that the presentation is up to
   // date.
-  FlushPendingNotifications(PR_TRUE);
+  FlushPendingNotifications(Flush_Layout);
 
   nsCOMPtr<nsIPresContext> presContext;
   mDocShell->GetPresContext(getter_AddRefs(presContext));
@@ -5497,11 +5523,11 @@ GlobalWindowImpl::SecurityCheckURL(const char *aURL)
 }
 
 void
-GlobalWindowImpl::FlushPendingNotifications(PRBool aFlushReflows)
+GlobalWindowImpl::FlushPendingNotifications(mozFlushType aType)
 {
   nsCOMPtr<nsIDocument> doc(do_QueryInterface(mDocument));
   if (doc) {
-    doc->FlushPendingNotifications(aFlushReflows);
+    doc->FlushPendingNotifications(aType);
   }
 }
 

dom/src/base/nsGlobalWindow.h

@@ -83,6 +83,7 @@
 #include "nsIXPCScriptable.h"
 #include "nsPoint.h"
 #include "nsSize.h"
+#include "mozFlushType.h"
 
 #define DEFAULT_HOME_PAGE "www.mozilla.org"
 #define PREF_BROWSER_STARTUP_HOMEPAGE "browser.startup.homepage"
@@ -249,7 +250,7 @@ protected:
                            const nsAString &aPopupURL,
                            const nsAString &aPopupWindowFeatures);
 
-  void FlushPendingNotifications(PRBool aFlushReflows);
+  void FlushPendingNotifications(mozFlushType aType);
   void EnsureReflowFlushAndPaint();
   nsresult CheckSecurityWidthAndHeight(PRInt32* width, PRInt32* height);
   nsresult CheckSecurityLeftAndTop(PRInt32* left, PRInt32* top);

extensions/inspector/base/src/inLayoutUtils.cpp

@@ -169,7 +169,7 @@ inLayoutUtils::GetScreenOrigin(nsIDOMElement* aElement)
 
     if (presShell) {
       // Flush all pending notifications so that our frames are uptodate
-      presShell->FlushPendingNotifications(PR_FALSE);
+      doc->FlushPendingNotifications(Flush_Layout);
 
       nsCOMPtr<nsIPresContext> presContext;
       presShell->GetPresContext(getter_AddRefs(presContext));

extensions/transformiix/source/xpath/nsXPathResult.cpp

@@ -163,7 +163,7 @@ nsXPathResult::IterateNext(nsIDOMNode **aResult)
         return NS_ERROR_DOM_TYPE_ERR;
 
     if (mDocument)
-        mDocument->FlushPendingNotifications(PR_FALSE);
+        mDocument->FlushPendingNotifications(Flush_Content);
 
     if (mInvalidIteratorState)
         return NS_ERROR_DOM_INVALID_STATE_ERR;

extensions/transformiix/source/xslt/txMozillaStylesheetCompiler.cpp

@@ -111,7 +111,7 @@ public:
     NS_IMETHOD WillInterrupt(void) { return NS_OK; }
     NS_IMETHOD WillResume(void) { return NS_OK; }
     NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
-    NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+    virtual void FlushContent(PRBool aNotify) { }
     NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
 
 private:

extensions/xmlterm/base/mozXMLTermSession.cpp

@@ -79,6 +79,7 @@
 #include "mozXMLTermSession.h"
 #include "nsISelectionController.h"
 #include "nsReadableUtils.h"
+#include "nsIDocument.h"
 
 /////////////////////////////////////////////////////////////////////////
 // mozXMLTermSession definition
@@ -3093,7 +3094,10 @@ NS_IMETHODIMP mozXMLTermSession::ScrollToBottomLeft(void)
   if (NS_FAILED(result) || !presShell)
     return NS_ERROR_FAILURE;
 
-  presShell->FlushPendingNotifications(PR_FALSE);
+  nsIDocument* doc = presShell->GetDocument();
+  if (doc) {
+    doc->FlushPendingNotifications(Flush_Layout);
+  }
 
   // Get DOM Window
   nsCOMPtr<nsIDocShell> docShell;

layout/base/nsDocumentViewer.cpp

@@ -656,7 +656,7 @@ DocumentViewerImpl::InitPresentationStuff(PRBool aDoInitialReflow)
     // Note that we are flushing before we add mPresShell as an observer
     // to avoid bogus notifications.
 
-    mDocument->FlushPendingNotifications(PR_FALSE);
+    mDocument->FlushPendingNotifications(Flush_ContentAndNotify);
   }
 
   mPresShell->BeginObservingDocument();
@@ -935,9 +935,7 @@ DocumentViewerImpl::LoadComplete(nsresult aStatus)
   static PRBool forcePaint
     = PR_GetEnv("MOZ_FORCE_PAINT_AFTER_ONLOAD") != nsnull;
   if (forcePaint) {
-    if (mPresShell) {
+    mDocument->FlushPendingNotifications(Flush_Display);
-      mPresShell->FlushPendingNotifications(PR_TRUE);
-    }
     nsIURI *uri = mDocument->GetDocumentURI();
     nsCAutoString spec;
     if (uri) {

layout/base/nsIPresShell.h

@@ -59,6 +59,7 @@
 #include "nsCompatibility.h"
 #include "nsCOMArray.h"
 #include "nsFrameManagerBase.h"
+#include "mozFlushType.h"
 #include <stdio.h> // for FILE definition
 
 class nsIAtom;
@@ -324,11 +325,15 @@ public:
   NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush) = 0;
 
   /**
-   * Flush all pending notifications such that the presentation is
+   * Flush pending notifications of the type specified.  This method
-   * in sync with the content.
+   * will not affect the content model; it'll just affect style and
-   * @param aUpdateViews PR_TRUE causes the affected views to be refreshed immediately.
+   * frames. Callers that actually want up-to-date presentation (other
+   * than the document itself) should probably be calling
+   * nsIDocument::FlushPendingNotifications.
+   *
+   * @param aType the type of notifications to flush
    */
-  NS_IMETHOD FlushPendingNotifications(PRBool aUpdateViews) = 0;
+  NS_IMETHOD FlushPendingNotifications(mozFlushType aType) = 0;
 
   /**
    * Post a request to handle a DOM event after Reflow has finished.

layout/base/nsPresShell.cpp

@@ -1131,7 +1131,7 @@ public:
                                          PRBool        aProcessDummyLayoutRequest = PR_TRUE);  
   NS_IMETHOD CancelAllReflowCommands();
   NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush);
-  NS_IMETHOD FlushPendingNotifications(PRBool aUpdateViews);
+  NS_IMETHOD FlushPendingNotifications(mozFlushType aType);
 
   /**
    * Recreates the frames for a node
@@ -3972,6 +3972,10 @@ PresShell::CantRenderReplacedElement(nsIFrame* aFrame)
 NS_IMETHODIMP
 PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
 {
+  if (!mDocument) {
+    return NS_ERROR_FAILURE;
+  }
+  
   // Hold a reference to the ESM in case event dispatch tears us down.
   nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
 
@@ -4097,7 +4101,7 @@ PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
   if (content) {
     // Flush notifications so we scroll to the right place
     if (aScroll) {
-      FlushPendingNotifications(PR_FALSE);
+      mDocument->FlushPendingNotifications(Flush_Layout);
     }
     
     // Get the primary frame
@@ -5087,7 +5091,7 @@ PresShell::HandlePostedReflowCallbacks()
    }
 
    if (shouldFlush)
-     FlushPendingNotifications(PR_FALSE);
+     FlushPendingNotifications(Flush_Layout);
 }
 
 void
@@ -5162,19 +5166,26 @@ PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush)
 
 
 NS_IMETHODIMP 
-PresShell::FlushPendingNotifications(PRBool aUpdateViews)
+PresShell::FlushPendingNotifications(mozFlushType aType)
 {
+  NS_ASSERTION(aType & (Flush_StyleReresolves | Flush_OnlyReflow |
+                        Flush_OnlyPaint),
+               "Why did we get called?");
+  
   PRBool isSafeToFlush;
   IsSafeToFlush(isSafeToFlush);
 
   if (isSafeToFlush) {
-    if (aUpdateViews && mViewManager) {
+    PRBool batchViews = (aType & Flush_OnlyPaint);
+    if (batchViews && mViewManager) {
       mViewManager->BeginUpdateViewBatch();
     }
 
+    if (aType & Flush_OnlyReflow) {
       ProcessReflowCommands(PR_FALSE);
+    }
 
-    if (aUpdateViews && mViewManager) {
+    if (batchViews && mViewManager) {
       mViewManager->EndUpdateViewBatch(NS_VMREFRESH_IMMEDIATE);
     }
   }
@@ -5202,7 +5213,7 @@ PresShell::EndReflowBatching(PRBool aFlushPendingReflows)
   nsresult rv = NS_OK;
   mBatchReflows = PR_FALSE;
   if (aFlushPendingReflows) {
-    rv = FlushPendingNotifications(PR_FALSE);
+    rv = FlushPendingNotifications(Flush_Layout);
   }
   else {
     PostReflowEvent();
@@ -6303,7 +6314,7 @@ PresShell::DidCauseReflow()
   // We may have had more reflow commands appended to the queue during
   // our reflow.  Make sure these get processed at some point.
   if (!gAsyncReflowDuringDocLoad && mDocumentLoading) {
-    FlushPendingNotifications(PR_FALSE);
+    FlushPendingNotifications(Flush_Layout);
   } else {
     PostReflowEvent();
   }

layout/base/public/nsIPresShell.h

@@ -59,6 +59,7 @@
 #include "nsCompatibility.h"
 #include "nsCOMArray.h"
 #include "nsFrameManagerBase.h"
+#include "mozFlushType.h"
 #include <stdio.h> // for FILE definition
 
 class nsIAtom;
@@ -324,11 +325,15 @@ public:
   NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush) = 0;
 
   /**
-   * Flush all pending notifications such that the presentation is
+   * Flush pending notifications of the type specified.  This method
-   * in sync with the content.
+   * will not affect the content model; it'll just affect style and
-   * @param aUpdateViews PR_TRUE causes the affected views to be refreshed immediately.
+   * frames. Callers that actually want up-to-date presentation (other
+   * than the document itself) should probably be calling
+   * nsIDocument::FlushPendingNotifications.
+   *
+   * @param aType the type of notifications to flush
    */
-  NS_IMETHOD FlushPendingNotifications(PRBool aUpdateViews) = 0;
+  NS_IMETHOD FlushPendingNotifications(mozFlushType aType) = 0;
 
   /**
    * Post a request to handle a DOM event after Reflow has finished.

layout/forms/nsComboboxControlFrame.cpp

@@ -616,7 +616,9 @@ nsComboboxControlFrame::ShowList(nsIPresContext* aPresContext, PRBool aShowList)
     mDroppedDown = PR_FALSE;
   }
 
-  aPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+  // Don't flush anything but reflows lest it destroy us
+  aPresContext->PresShell()->
+    GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
 
   if (widget)
     widget->CaptureRollupEvents((nsIRollupListener *)this, mDroppedDown, aShowList);
@@ -1809,8 +1811,6 @@ nsComboboxControlFrame::RedisplayText(PRInt32 aIndex)
       //mTextFrame->AddStateBits(NS_FRAME_IS_DIRTY);
       mDisplayFrame->AddStateBits(NS_FRAME_IS_DIRTY);
       ReflowDirtyChild(mPresContext->PresShell(), mDisplayFrame);
-
-//      mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
     }
   }
   return rv;

layout/forms/nsListControlFrame.cpp

@@ -3480,7 +3480,9 @@ nsListControlFrame::KeyPress(nsIDOMEvent* aKeyEvent)
     // Why aren't they getting flushed each time?
     // because this isn't needed for Gfx
     if (IsInDropDownMode() == PR_TRUE) {
-      mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+      // Don't flush anything but reflows lest it destroy us
+      mPresContext->PresShell()->
+        GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
     }
     REFLOW_DEBUG_MSG2("  After: %d\n", newIndex);
 

layout/html/base/src/nsPresShell.cpp

@@ -1131,7 +1131,7 @@ public:
                                          PRBool        aProcessDummyLayoutRequest = PR_TRUE);  
   NS_IMETHOD CancelAllReflowCommands();
   NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush);
-  NS_IMETHOD FlushPendingNotifications(PRBool aUpdateViews);
+  NS_IMETHOD FlushPendingNotifications(mozFlushType aType);
 
   /**
    * Recreates the frames for a node
@@ -3972,6 +3972,10 @@ PresShell::CantRenderReplacedElement(nsIFrame* aFrame)
 NS_IMETHODIMP
 PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
 {
+  if (!mDocument) {
+    return NS_ERROR_FAILURE;
+  }
+  
   // Hold a reference to the ESM in case event dispatch tears us down.
   nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
 
@@ -4097,7 +4101,7 @@ PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
   if (content) {
     // Flush notifications so we scroll to the right place
     if (aScroll) {
-      FlushPendingNotifications(PR_FALSE);
+      mDocument->FlushPendingNotifications(Flush_Layout);
     }
     
     // Get the primary frame
@@ -5087,7 +5091,7 @@ PresShell::HandlePostedReflowCallbacks()
    }
 
    if (shouldFlush)
-     FlushPendingNotifications(PR_FALSE);
+     FlushPendingNotifications(Flush_Layout);
 }
 
 void
@@ -5162,19 +5166,26 @@ PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush)
 
 
 NS_IMETHODIMP 
-PresShell::FlushPendingNotifications(PRBool aUpdateViews)
+PresShell::FlushPendingNotifications(mozFlushType aType)
 {
+  NS_ASSERTION(aType & (Flush_StyleReresolves | Flush_OnlyReflow |
+                        Flush_OnlyPaint),
+               "Why did we get called?");
+  
   PRBool isSafeToFlush;
   IsSafeToFlush(isSafeToFlush);
 
   if (isSafeToFlush) {
-    if (aUpdateViews && mViewManager) {
+    PRBool batchViews = (aType & Flush_OnlyPaint);
+    if (batchViews && mViewManager) {
       mViewManager->BeginUpdateViewBatch();
     }
 
+    if (aType & Flush_OnlyReflow) {
       ProcessReflowCommands(PR_FALSE);
+    }
 
-    if (aUpdateViews && mViewManager) {
+    if (batchViews && mViewManager) {
       mViewManager->EndUpdateViewBatch(NS_VMREFRESH_IMMEDIATE);
     }
   }
@@ -5202,7 +5213,7 @@ PresShell::EndReflowBatching(PRBool aFlushPendingReflows)
   nsresult rv = NS_OK;
   mBatchReflows = PR_FALSE;
   if (aFlushPendingReflows) {
-    rv = FlushPendingNotifications(PR_FALSE);
+    rv = FlushPendingNotifications(Flush_Layout);
   }
   else {
     PostReflowEvent();
@@ -6303,7 +6314,7 @@ PresShell::DidCauseReflow()
   // We may have had more reflow commands appended to the queue during
   // our reflow.  Make sure these get processed at some point.
   if (!gAsyncReflowDuringDocLoad && mDocumentLoading) {
-    FlushPendingNotifications(PR_FALSE);
+    FlushPendingNotifications(Flush_Layout);
   } else {
     PostReflowEvent();
   }

layout/html/forms/src/nsComboboxControlFrame.cpp

@@ -616,7 +616,9 @@ nsComboboxControlFrame::ShowList(nsIPresContext* aPresContext, PRBool aShowList)
     mDroppedDown = PR_FALSE;
   }
 
-  aPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+  // Don't flush anything but reflows lest it destroy us
+  aPresContext->PresShell()->
+    GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
 
   if (widget)
     widget->CaptureRollupEvents((nsIRollupListener *)this, mDroppedDown, aShowList);
@@ -1809,8 +1811,6 @@ nsComboboxControlFrame::RedisplayText(PRInt32 aIndex)
       //mTextFrame->AddStateBits(NS_FRAME_IS_DIRTY);
       mDisplayFrame->AddStateBits(NS_FRAME_IS_DIRTY);
       ReflowDirtyChild(mPresContext->PresShell(), mDisplayFrame);
-
-//      mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
     }
   }
   return rv;

layout/html/forms/src/nsListControlFrame.cpp

@@ -3480,7 +3480,9 @@ nsListControlFrame::KeyPress(nsIDOMEvent* aKeyEvent)
     // Why aren't they getting flushed each time?
     // because this isn't needed for Gfx
     if (IsInDropDownMode() == PR_TRUE) {
-      mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+      // Don't flush anything but reflows lest it destroy us
+      mPresContext->PresShell()->
+        GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
     }
     REFLOW_DEBUG_MSG2("  After: %d\n", newIndex);
 

layout/style/nsComputedDOMStyle.cpp

@@ -271,6 +271,11 @@ nsComputedDOMStyle::GetPropertyCSSValue(const nsAString& aPropertyName,
 
   NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
 
+  nsIDocument* document = mContent->GetDocument();
+  if (document) {
+    document->FlushPendingNotifications(Flush_Style);
+  }
+
   nsIFrame *frame = nsnull;
   presShell->GetPrimaryFrameFor(mContent, &frame);
 
@@ -2873,7 +2878,7 @@ nsComputedDOMStyle::FlushPendingReflows()
   // Flush all pending notifications so that our frames are up to date
   nsIDocument* document = mContent->GetDocument();
   if (document) {
-    document->FlushPendingNotifications();
+    document->FlushPendingNotifications(Flush_Layout);
   }
 }
 

layout/svg/base/src/nsSVGOuterSVGFrame.cpp

@@ -1060,7 +1060,10 @@ void nsSVGOuterSVGFrame::InitiateReflow()
   }
   
   mPresShell->AppendReflowCommand(reflowCmd);
-  mPresShell->FlushPendingNotifications(PR_FALSE);  
+  // XXXbz why is this synchronously flushing reflows, exactly?  If it
+  // needs to, why is it not using the presshell's reflow batching
+  // instead of hacking its own?
+  mPresShell->FlushPendingNotifications(Flush_OnlyReflow);  
 }
 
 

layout/xul/base/src/nsBoxObject.cpp

@@ -187,7 +187,7 @@ nsBoxObject::GetOffsetRect(nsRect& aRect)
 
     if(presShell) {
       // Flush all pending notifications so that our frames are uptodate
-      presShell->FlushPendingNotifications(PR_FALSE);
+      doc->FlushPendingNotifications(Flush_Layout);
 
       // Get the Frame for our content
       nsIFrame* frame = nsnull;
@@ -282,7 +282,7 @@ nsBoxObject::GetScreenRect(nsRect& aRect)
 
     if (presShell) {
       // Flush all pending notifications so that our frames are uptodate
-      presShell->FlushPendingNotifications(PR_FALSE);
+      doc->FlushPendingNotifications(Flush_Layout);
 
       nsCOMPtr<nsIPresContext> presContext;
       presShell->GetPresContext(getter_AddRefs(presContext));

layout/xul/base/src/nsListBoxBodyFrame.cpp

@@ -404,7 +404,8 @@ nsListBoxBodyFrame::PositionChanged(PRInt32 aOldIndex, PRInt32& aNewIndex)
 
      smoother->Stop();
 
-     mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+     // Don't flush anything but reflows lest it destroy us
+     mContent->GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
 
      smoother->mDelta = newTwipIndex > oldTwipIndex ? rowDelta : -rowDelta;
 
@@ -851,7 +852,8 @@ nsListBoxBodyFrame::DoScrollToIndex(PRInt32 aRowIndex, PRBool aForceDestruct)
 
   // This change has to happen immediately.
   // Flush any pending reflow commands.
-  mContent->GetDocument()->FlushPendingNotifications();
+  // Don't flush anything but reflows lest it destroy us
+  mContent->GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
 
   return NS_OK;
 }
@@ -881,8 +883,7 @@ nsListBoxBodyFrame::InternalPositionChanged(PRBool aUp, PRInt32 aDelta, PRBool a
   // begin timing how long it takes to scroll a row
   PRTime start = PR_Now();
 
-  nsIPresShell *shell = mPresContext->PresShell();
+  mContent->GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);
-  shell->FlushPendingNotifications(PR_FALSE);
 
   PRInt32 visibleRows = 0;
   if (mRowHeight)
@@ -927,7 +928,9 @@ nsListBoxBodyFrame::InternalPositionChanged(PRBool aUp, PRInt32 aDelta, PRBool a
   nsBoxLayoutState state(mPresContext);
   mScrolling = PR_TRUE;
   MarkDirtyChildren(state);
-  shell->FlushPendingNotifications(PR_FALSE); // Calls CreateRows
+  // Flush calls CreateRows
+  // XXXbz there has to be a better way to do this than flushing!
+  mPresContext->PresShell()->FlushPendingNotifications(Flush_OnlyReflow);
   mScrolling = PR_FALSE;
   
   VerticalScroll(mYPosition);
@@ -1318,7 +1321,7 @@ nsListBoxBodyFrame::OnContentInserted(nsIPresContext* aPresContext, nsIContent*
   
   nsBoxLayoutState state(aPresContext);
   MarkDirtyChildren(state);
-  shell->FlushPendingNotifications(PR_FALSE);
+  shell->FlushPendingNotifications(Flush_OnlyReflow);
 }
 
 // 
@@ -1390,7 +1393,7 @@ nsListBoxBodyFrame::OnContentRemoved(nsIPresContext* aPresContext, nsIFrame* aCh
   }
 
   MarkDirtyChildren(state);
-  aPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+  aPresContext->PresShell()->FlushPendingNotifications(Flush_OnlyReflow);
 }
 
 void

layout/xul/base/src/nsMenuFrame.cpp

@@ -802,7 +802,7 @@ nsMenuFrame::OpenMenuInternal(PRBool aActivateFlag)
       {
          menuPopup->MarkDirty(state);
 
-         mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+         mPresContext->PresShell()->FlushPendingNotifications(Flush_OnlyReflow);
       }
 
       nsRect curRect;
@@ -823,7 +823,7 @@ nsMenuFrame::OpenMenuInternal(PRBool aActivateFlag)
       if (curRect.height != rect.height || mLastPref.height != rect.height)
       {
          menuPopup->MarkDirty(state);
-         mPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
+         mPresContext->PresShell()->FlushPendingNotifications(Flush_OnlyReflow);
       }
 
       ActivateMenu(PR_TRUE);

layout/xul/base/src/nsPopupSetFrame.cpp

@@ -563,7 +563,7 @@ nsPopupSetFrame::ActivatePopup(nsPopupFrameList* aEntry, PRBool aActivateFlag)
       // reflow will cause the popup to show itself again. (bug 71219)
       nsIDocument* doc = aEntry->mPopupContent->GetDocument();
       if (doc)
-        doc->FlushPendingNotifications();
+        doc->FlushPendingNotifications(Flush_OnlyReflow);
          
       // make sure we hide the popup. We can't assume that we'll have a view
       // since we could be cleaning up after someone that didn't correctly 

layout/xul/base/src/nsSplitterFrame.cpp

@@ -1047,11 +1047,7 @@ nsSplitterFrameInner::AdjustChildren(nsIPresContext* aPresContext)
         frame->GetOffsetFromView(aPresContext, offset, &view);
         NS_ASSERTION(nsnull != view, "no view");
     }
-    nsIViewManager* viewManager = view->GetViewManager();
+    aPresContext->PresShell()->FlushPendingNotifications(Flush_Display);
-
-    viewManager->DisableRefresh();
-    aPresContext->PresShell()->FlushPendingNotifications(PR_FALSE);
-    viewManager->EnableRefresh(NS_VMREFRESH_IMMEDIATE);
   }
   else {
     nsBoxLayoutState state(aPresContext);

parser/htmlparser/public/nsIContentSink.h

@@ -109,10 +109,13 @@ public:
   NS_IMETHOD SetParser(nsIParser* aParser)=0;
 
   /**
-   * Flush all pending notifications so that the content model
+   * Flush content so that the content model is in sync with the state
-   * is in sync with the state of the sink.
+   * of the sink.
+   *
+   * @param aNotify true if notifications should be fired in the
+   * process (instead of deferred for now).
    */
-  NS_IMETHOD FlushPendingNotifications()=0;
+  virtual void FlushContent(PRBool aNotify)=0;
 
   /**
    * Set the document character set. This should be passed on to the

parser/htmlparser/robot/nsRobotSink.cpp

@@ -104,7 +104,7 @@ public:
   NS_IMETHOD WillInterrupt(void) { return NS_OK; }
   NS_IMETHOD WillResume(void) { return NS_OK; }
   NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
   NS_IMETHOD WillProcessTokens(void) { return NS_OK; }
   NS_IMETHOD DidProcessTokens(void) { return NS_OK; }

parser/htmlparser/src/nsLoggingSink.h

@@ -72,7 +72,7 @@ public:
   NS_IMETHOD AddComment(const nsIParserNode& aNode);
   NS_IMETHOD AddProcessingInstruction(const nsIParserNode& aNode);
   NS_IMETHOD AddDocTypeDecl(const nsIParserNode& aNode);
-  NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+  virtual void FlushContent(PRBool aNotify) { }
   NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
   NS_IMETHOD NotifyTagObservers(nsIParserNode* aNode) { return NS_OK; }
 

rdf/base/src/nsRDFContentSink.cpp

@@ -172,7 +172,7 @@ public:
     NS_IMETHOD WillInterrupt(void);
     NS_IMETHOD WillResume(void);
     NS_IMETHOD SetParser(nsIParser* aParser);  
-    NS_IMETHOD FlushPendingNotifications() { return NS_OK; }
+    virtual void FlushContent(PRBool aNotify) { }
     NS_IMETHOD SetDocumentCharset(nsACString& aCharset) { return NS_OK; }
 
     // nsIRDFContentSink

webshell/tests/viewer/nsWebCrawler.cpp

@@ -438,17 +438,8 @@ nsWebCrawler::OnStateChange(nsIWebProgress* aWebProgress,
     // Make sure the document bits make it to the screen at least once
     nsCOMPtr<nsIPresShell> shell = dont_AddRef(GetPresShell());
     if (shell) {
-      // Force the presentation shell to flush any pending reflows
+      // Force the presentation shell to update the display
-      shell->FlushPendingNotifications(PR_FALSE);
+      shell->FlushPendingNotifications(Flush_Display);
-
-      // Force the view manager to update itself
-      nsCOMPtr<nsIViewManager> vm;
-      shell->GetViewManager(getter_AddRefs(vm));
-      if (vm) {
-        nsIView* rootView;
-        vm->GetRootView(rootView);
-        vm->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE);
-      }
 
       if (mJiggleLayout) {
         nsRect r;

xpfe/appshell/src/nsContentTreeOwner.cpp

@@ -388,6 +388,7 @@ NS_IMETHODIMP nsContentTreeOwner::SetStatus(PRUint32 aStatusType, const PRUnicha
   // XXX: This is nasty because we have to drill down to the nsIDocument to
   //      force the flushing...
   //
+  // XXXbz no, this is nasty because we're flushing at all!
   nsCOMPtr<nsIDOMDocument> domDoc;
   nsCOMPtr<nsIDocument> doc;
 
@@ -395,7 +396,7 @@ NS_IMETHODIMP nsContentTreeOwner::SetStatus(PRUint32 aStatusType, const PRUnicha
   doc = do_QueryInterface(domDoc);
 
   if (doc) {
-    doc->FlushPendingNotifications(PR_TRUE, PR_TRUE);
+    doc->FlushPendingNotifications(Flush_Layout);
   }
 
   return NS_OK;