From f9bea49aa1042ffa1e2c871a28549efcc7632800 Mon Sep 17 00:00:00 2001
From: "bzbarsky%mit.edu" <bzbarsky%mit.edu>
Date: Sun, 11 Dec 2005 20:45:58 +0000
Subject: [PATCH] Remove the mGoodToGo goop.  Its main effect seems to be to
 cause crashes when HTML <select>s are used in XUL.  Bug 319796, r+sr=roc

---
 layout/forms/nsComboboxControlFrame.cpp | 182 +++++++-----------------
 layout/forms/nsComboboxControlFrame.h   |   3 -
 2 files changed, 55 insertions(+), 130 deletions(-)

diff --git a/layout/forms/nsComboboxControlFrame.cpp b/layout/forms/nsComboboxControlFrame.cpp
index 6d4df1f90388..d8f613d88fe7 100644
--- a/layout/forms/nsComboboxControlFrame.cpp
+++ b/layout/forms/nsComboboxControlFrame.cpp
@@ -336,7 +336,6 @@ nsComboboxControlFrame::nsComboboxControlFrame()
   mCachedUncComboSize.height   = kSizeNotSet;
   mItemDisplayWidth             = 0;
 
-  mGoodToGo = PR_FALSE;
   mInRedisplayText = PR_FALSE;
   mRedisplayTextEventPosted = PR_FALSE;
 
@@ -415,23 +414,6 @@ nsComboboxControlFrame::Init(nsPresContext*  aPresContext,
               nsIFrame*        aPrevInFlow)
 {
   mEventQueueService = do_GetService(kEventQueueServiceCID);
-
-  //-------------------------------
-  // Start - Temporary fix for Bug 36558
-  //-------------------------------
-  mGoodToGo = PR_FALSE;
-  nsIDocument* document = aContent->GetDocument();
-  if (document) {
-#ifdef MOZ_XUL
-    nsCOMPtr<nsIXULDocument> xulDoc(do_QueryInterface(document));
-    mGoodToGo = xulDoc?PR_FALSE:PR_TRUE;
-#else
-    mGoodToGo = PR_TRUE;
-#endif
-  }
-  //-------------------------------
-  // Done - Temporary fix for Bug 36558
-  //-------------------------------
   
   return nsAreaFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
 }
@@ -1189,12 +1171,6 @@ nsComboboxControlFrame::Reflow(nsPresContext*          aPresContext,
     return NS_OK;
   }
 
-  if (eReflowReason_Initial == aReflowState.reason) {
-    if (NS_FAILED(CreateDisplayFrame(aPresContext))) {
-      return NS_ERROR_FAILURE;
-    }
-  }
-
   // Go get all of the important frame
   nsresult rv = NS_OK;
   // Don't try to do any special sizing and positioning unless all of the frames
@@ -1986,52 +1962,6 @@ nsComboboxControlFrame::GetContentInsertionFrame() {
   return mInRedisplayText ? mDisplayFrame : mDropdownFrame->GetContentInsertionFrame();
 }
 
-NS_IMETHODIMP 
-nsComboboxControlFrame::CreateDisplayFrame(nsPresContext* aPresContext)
-{
-  if (mGoodToGo) {
-    return NS_OK;
-  }
-
-  nsIPresShell *shell = aPresContext->PresShell();
-  nsStyleSet *styleSet = shell->StyleSet();
-
-  mDisplayFrame = NS_NewBlockFrame(shell, NS_BLOCK_SPACE_MGR);
-  if (NS_UNLIKELY(!mDisplayFrame)) {
-    return NS_ERROR_OUT_OF_MEMORY;
-  }
-
-  // create the style context for the anonymous frame
-  nsRefPtr<nsStyleContext> styleContext;
-  styleContext = styleSet->ResolvePseudoStyleFor(mContent, 
-                                                 nsCSSAnonBoxes::mozDisplayComboboxControlFrame,
-                                                 mStyleContext);
-  if (!styleContext) { return NS_ERROR_NULL_POINTER; }
-  
-  // create a text frame and put it inside the block frame
-  mTextFrame = NS_NewTextFrame(shell);
-  if (NS_UNLIKELY(!mTextFrame)) {
-    return NS_ERROR_OUT_OF_MEMORY;
-  }
-
-  nsRefPtr<nsStyleContext> textStyleContext;
-  textStyleContext = styleSet->ResolveStyleForNonElement(styleContext);
-  if (!textStyleContext) { return NS_ERROR_NULL_POINTER; }
-  nsCOMPtr<nsIContent> content(do_QueryInterface(mDisplayContent));
-  mTextFrame->Init(aPresContext, content, mDisplayFrame, textStyleContext, nsnull);
-  mTextFrame->SetInitialChildList(aPresContext, nsnull, nsnull);
-
-  aPresContext->FrameManager()->SetPrimaryFrameFor(content, mTextFrame);
-
-  nsresult rv = mDisplayFrame->Init(aPresContext, mContent, this, styleContext, nsnull);
-  if (NS_FAILED(rv)) { return rv; }
-
-  mDisplayFrame->SetInitialChildList(aPresContext, nsnull, mTextFrame);
-
-  return NS_OK;
-}
-
-
 NS_IMETHODIMP
 nsComboboxControlFrame::CreateAnonymousContent(nsPresContext* aPresContext,
                                                nsISupportsArray& aChildList)
@@ -2112,61 +2042,67 @@ nsComboboxControlFrame::CreateFrameFor(nsPresContext*   aPresContext,
   NS_PRECONDITION(nsnull != aPresContext, "null ptr");
 
   *aFrame = nsnull;
-  NS_ASSERTION(mDisplayContent != nsnull, "mDisplayContent can't be null!");
+  NS_ASSERTION(mDisplayContent, "mDisplayContent can't be null!");
 
-  if (!mGoodToGo) {
+  if (!SameCOMIdentity(mDisplayContent, aContent)) {
+    // We only handle the frames for mDisplayContent here
     return NS_ERROR_FAILURE;
   }
+  
+  // Get PresShell
+  nsIPresShell *shell = aPresContext->PresShell();
+  nsStyleSet *styleSet = shell->StyleSet();
 
-  nsCOMPtr<nsIContent> content(do_QueryInterface(mDisplayContent));
-  if (aContent == content.get()) {
-    // Get PresShell
-    nsIPresShell *shell = aPresContext->PresShell();
-    nsStyleSet *styleSet = shell->StyleSet();
-
-    // Start by by creating a containing frame
-    mDisplayFrame = NS_NewBlockFrame(shell, NS_BLOCK_SPACE_MGR);
-    if (NS_UNLIKELY(!mDisplayFrame)) {
-      return NS_ERROR_OUT_OF_MEMORY;
-    }
-
-    // create the style context for the anonymous block frame
-    nsRefPtr<nsStyleContext> styleContext;
-    styleContext = styleSet->ResolvePseudoStyleFor(mContent, 
-                                                   nsCSSAnonBoxes::mozDisplayComboboxControlFrame,
-                                                   mStyleContext);
-    if (!styleContext) { return NS_ERROR_NULL_POINTER; }
-
-    // Create a text frame and put it inside the block frame
-    mTextFrame = NS_NewTextFrame(shell);
-    if (NS_UNLIKELY(!mTextFrame)) {
-      return NS_ERROR_OUT_OF_MEMORY;
-    }
-
-    nsRefPtr<nsStyleContext> textStyleContext;
-    textStyleContext = styleSet->ResolveStyleForNonElement(styleContext);
-    if (!textStyleContext) { return NS_ERROR_NULL_POINTER; }
-
-    // initialize the text frame
-    mTextFrame->Init(aPresContext, content, mDisplayFrame, textStyleContext, nsnull);
-    mTextFrame->SetInitialChildList(aPresContext, nsnull, nsnull);
-
-    /*nsCOMPtr<nsIFrameManager> frameManager;
-    rv = shell->GetFrameManager(getter_AddRefs(frameManager));
-    if (NS_FAILED(rv)) { return rv; }
-    if (!frameManager) { return NS_ERROR_NULL_POINTER; }
-    frameManager->SetPrimaryFrameFor(content, mTextFrame);
-    */
-
-    nsresult rv = mDisplayFrame->Init(aPresContext, mContent, this, styleContext, nsnull);
-    if (NS_FAILED(rv)) { return rv; }
-
-    mDisplayFrame->SetInitialChildList(aPresContext, nsnull, mTextFrame);
-    *aFrame = mDisplayFrame;
-    return NS_OK;
+  // create the style contexts for the anonymous block frame and text frame
+  nsRefPtr<nsStyleContext> styleContext;
+  styleContext = styleSet->
+    ResolvePseudoStyleFor(mContent, 
+                          nsCSSAnonBoxes::mozDisplayComboboxControlFrame,
+                          mStyleContext);
+  if (NS_UNLIKELY(!styleContext)) {
+    return NS_ERROR_NULL_POINTER;
   }
 
-  return NS_ERROR_FAILURE;
+  nsRefPtr<nsStyleContext> textStyleContext;
+  textStyleContext = styleSet->ResolveStyleForNonElement(styleContext);
+  if (NS_UNLIKELY(!textStyleContext)) {
+    return NS_ERROR_NULL_POINTER;
+  }
+
+  // Start by by creating our anonymous block frame
+  mDisplayFrame = NS_NewBlockFrame(shell, NS_BLOCK_SPACE_MGR);
+  if (NS_UNLIKELY(!mDisplayFrame)) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  nsresult rv = mDisplayFrame->Init(aPresContext, mContent, this, styleContext,
+                                    nsnull);
+  if (NS_FAILED(rv)) {
+    mDisplayFrame->Destroy(aPresContext);
+    mDisplayFrame = nsnull;
+    return rv;
+  }
+
+  // Create a text frame and put it inside the block frame
+  mTextFrame = NS_NewTextFrame(shell);
+  if (NS_UNLIKELY(!mTextFrame)) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  // initialize the text frame
+  rv = mTextFrame->Init(aPresContext, aContent, mDisplayFrame,
+                        textStyleContext, nsnull);
+  if (NS_FAILED(rv)) {
+    mDisplayFrame->Destroy(aPresContext);
+    mDisplayFrame = nsnull;
+    mTextFrame->Destroy(aPresContext);
+    mTextFrame = nsnull;
+    return rv;
+  }
+
+  mDisplayFrame->SetInitialChildList(aPresContext, nsnull, mTextFrame);
+  *aFrame = mDisplayFrame;
+  return NS_OK;
 }
 
 
@@ -2216,14 +2152,6 @@ nsComboboxControlFrame::Destroy(nsPresContext* aPresContext)
   }
   mPopupFrames.DestroyFrames(aPresContext);
 
-  if (!mGoodToGo) {
-    if (mDisplayFrame) {
-      fc->RemoveMappingsForFrameSubtree(mDisplayFrame, nsnull);
-      mDisplayFrame->Destroy(aPresContext);
-      mDisplayFrame = nsnull;
-    }
-  }
-
   return nsAreaFrame::Destroy(aPresContext);
 }
 
diff --git a/layout/forms/nsComboboxControlFrame.h b/layout/forms/nsComboboxControlFrame.h
index 9de8b45263ec..c12b1a273f9d 100644
--- a/layout/forms/nsComboboxControlFrame.h
+++ b/layout/forms/nsComboboxControlFrame.h
@@ -211,8 +211,6 @@ public:
 
 protected:
 
-  NS_IMETHOD CreateDisplayFrame(nsPresContext* aPresContext);
-
 #ifdef DO_NEW_REFLOW
   NS_IMETHOD ReflowItems(nsPresContext* aPresContext,
                          const nsHTMLReflowState& aReflowState,
@@ -281,7 +279,6 @@ protected:
   //nscoord               mItemDisplayHeight;
 
   PRPackedBool          mDroppedDown;             // Current state of the dropdown list, PR_TRUE is dropped down
-  PRPackedBool          mGoodToGo;
   PRPackedBool          mInRedisplayText;
   PRPackedBool          mRedisplayTextEventPosted;