Fix for bug #176251 (Problems with nsContentIterator PRE traversal)

content/base/public/nsIContentIterator.h
  content/base/src/nsContentIterator.cpp
  content/base/src/nsGeneratedIterator.cpp
  content/build/nsContentCID.h
  content/build/nsContentModule.cpp
  embedding/components/find/src/nsFind.cpp
  layout/html/style/src/nsFrameContentIterator.cpp

  - Removed MakePre() and MakePost() from the nsIContentIterator interface.
  - Traversal must now be specified at time of creation.
  - Fixed nsContentIterator Init() methods so that they correctly calculate
    mFirst and mLast.
  - Modified PositionAt() to check if the node is in the traversal range.

r=jfrancis@netscape.com  sr=sfraser@netscape.com


git-svn-id: svn://10.0.0.236/trunk@134263 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/base/nsFrameContentIterator.cpp

@@ -46,9 +46,6 @@ public:
   NS_IMETHOD IsDone();
   NS_IMETHOD PositionAt(nsIContent* aCurNode);
 
-  NS_IMETHOD MakePre();
-  NS_IMETHOD MakePost();
-
 private:
   nsCOMPtr<nsIPresContext>  mPresContext;
   nsIFrame*                 mParentFrame;
@@ -275,18 +272,6 @@ nsFrameContentIterator::PositionAt(nsIContent* aCurNode)
   return NS_ERROR_FAILURE;
 }
 
-NS_IMETHODIMP
-nsFrameContentIterator::MakePre()
-{
-  return NS_ERROR_NOT_IMPLEMENTED;
-}
-
-NS_IMETHODIMP
-nsFrameContentIterator::MakePost()
-{
-  return NS_ERROR_NOT_IMPLEMENTED;
-}
-
 nsresult
 NS_NewFrameContentIterator(nsIPresContext*      aPresContext,
                            nsIFrame*            aFrame,