Bug 682077 - Remove nsITreeImageListener interface to make inheritance hierarchy more clear. r=neil, sr=bz

--HG--
extra : rebase_source : 37becb5bb6a987fafb90a340284d284614dc64ae

layout/xul/base/src/tree/src/nsITreeImageListener.h

@@ -1,64 +0,0 @@
-/* ***** 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
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 2011
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *   Dave Hyatt <hyatt@mozilla.org> (Original Author)
- *   Jan Varga <varga@ku.sk>
- *   Scott Johnson <sjohnson@mozilla.com>, Mozilla Corporation
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either 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 nsITreeImageListener_h__
-#define nsITreeImageListener_h__
-
-// The interface for our image listener.
-// {90586540-2D50-403e-8DCE-981CAA778444}
-#define NS_ITREEIMAGELISTENER_IID \
-{ 0x90586540, 0x2d50, 0x403e, { 0x8d, 0xce, 0x98, 0x1c, 0xaa, 0x77, 0x84, 0x44 } }
-
-class nsITreeImageListener : public nsISupports
-{
-public:
-  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ITREEIMAGELISTENER_IID)
-
-  NS_IMETHOD AddCell(PRInt32 aIndex, nsITreeColumn* aCol) = 0;
-
-  /**
-   * Clear the internal frame pointer to prevent dereferencing an object
-   * that no longer exists.
-   */
-  NS_IMETHOD ClearFrame() = 0;
-};
-
-NS_DEFINE_STATIC_IID_ACCESSOR(nsITreeImageListener, NS_ITREEIMAGELISTENER_IID)
-
-#endif

layout/xul/base/src/tree/src/nsTreeBodyFrame.cpp

@@ -2157,9 +2157,11 @@ nsTreeBodyFrame::GetImage(PRInt32 aRowIndex, nsTreeColumn* aCol, bool aUseContex
       // We either aren't done loading, or we're animating. Add our row as a listener for invalidations.
       nsCOMPtr<imgIDecoderObserver> obs;
       imgReq->GetDecoderObserver(getter_AddRefs(obs));
-      nsCOMPtr<nsITreeImageListener> listener(do_QueryInterface(obs));
-      if (listener)
-        listener->AddCell(aRowIndex, aCol);
+
+      if (obs) {
+        static_cast<nsTreeImageListener*> (obs.get())->AddCell(aRowIndex, aCol);
+      }
+
       return NS_OK;
     }
   }

layout/xul/base/src/tree/src/nsTreeBodyFrame.h

@@ -61,7 +61,6 @@
 #include "nsScrollbarFrame.h"
 #include "nsThreadUtils.h"
 #include "mozilla/LookAndFeel.h"
-#include "nsITreeImageListener.h"
 
 class nsOverflowChecker;
 class nsTreeImageListener;

layout/xul/base/src/tree/src/nsTreeImageListener.cpp

@@ -42,7 +42,7 @@
 #include "imgIRequest.h"
 #include "imgIContainer.h"
 
-NS_IMPL_ISUPPORTS3(nsTreeImageListener, imgIDecoderObserver, imgIContainerObserver, nsITreeImageListener)
+NS_IMPL_ISUPPORTS2(nsTreeImageListener, imgIDecoderObserver, imgIContainerObserver)
 
 nsTreeImageListener::nsTreeImageListener(nsTreeBodyFrame* aTreeFrame)
   : mTreeFrame(aTreeFrame),
@@ -92,7 +92,7 @@ NS_IMETHODIMP nsTreeImageListener::FrameChanged(imgIContainer *aContainer,
 }
 
 
-NS_IMETHODIMP
+void
 nsTreeImageListener::AddCell(PRInt32 aIndex, nsITreeColumn* aCol)
 {
   if (!mInvalidationArea) {
@@ -114,8 +114,6 @@ nsTreeImageListener::AddCell(PRInt32 aIndex, nsITreeColumn* aCol)
       mInvalidationArea->AddRow(aIndex);
     }
   }
-
-  return NS_OK;
 }
 
 

layout/xul/base/src/tree/src/nsTreeImageListener.h

@@ -45,10 +45,9 @@
 #include "nsITreeColumns.h"
 #include "nsStubImageDecoderObserver.h"
 #include "nsTreeBodyFrame.h"
-#include "nsITreeImageListener.h"
 
 // This class handles image load observation.
-class nsTreeImageListener : public nsStubImageDecoderObserver, public nsITreeImageListener
+class nsTreeImageListener : public nsStubImageDecoderObserver
 {
 public:
   nsTreeImageListener(nsTreeBodyFrame *aTreeFrame);
@@ -64,7 +63,6 @@ public:
   NS_IMETHOD FrameChanged(imgIContainer *aContainer,
                           const nsIntRect *aDirtyRect);
 
-  NS_IMETHOD AddCell(PRInt32 aIndex, nsITreeColumn* aCol);
   NS_IMETHOD ClearFrame();
 
   friend class nsTreeBodyFrame;
@@ -72,6 +70,7 @@ public:
 protected:
   void UnsuppressInvalidation() { mInvalidationSuppressed = false; }
   void Invalidate();
+  void AddCell(PRInt32 aIndex, nsITreeColumn* aCol);
 
 private:
   nsTreeBodyFrame* mTreeFrame;