content/base/public/nsPresShellIterator.h

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   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  15  * The Original Code is mozilla.org code.
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  21  * Contributor(s):
  22  *   Olli Pettay <Olli.Pettay@helsinki.fi> (Original Author)
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  24  * Alternatively, the contents of this file may be used under the terms of
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  37
  38 #ifndef nsPresShellIterato_h___
  39 #define nsPresShellIterato_h___
  40
  41 #include "nsIPresShell.h"
  42 #include "nsIDocument.h"
  43
  44 class nsPresShellIterator :
  45   private nsTObserverArray<nsIPresShell*>::ForwardIterator
  46 {
  47 public:
  48   nsPresShellIterator(nsIDocument* aDoc)
  49   : nsTObserverArray<nsIPresShell*>::ForwardIterator(aDoc->mPresShells),
  50     mDoc(aDoc) {}
  51
  52   already_AddRefed<nsIPresShell> GetNextShell()
  53   {
  54     nsIPresShell* shell = nsnull;
  55     if (!mDoc->ShellsAreHidden() && HasMore()) {
  56       shell = GetNext();
  57       NS_IF_ADDREF(shell);
  58     }
  59     return shell;
  60   }
  61
  62   PRBool HasMoreThanOneShell() {
  63     return mDoc->mPresShells.Length() > 1;
  64   }
  65
  66 private:
  67   static void* operator new(size_t) CPP_THROW_NEW { return 0; }
  68   static void operator delete(void*, size_t) {}
  69
  70   nsCOMPtr<nsIDocument> mDoc;
  71 };
  72
  73 #endif