Added IsPainting method to return whether the viewmanager is currently painting. bug 56335 a=buster@netscape.com r=vidur@netscape.com

view/public/nsIViewManager.h

@@ -508,6 +508,14 @@ public:
    */
   NS_IMETHOD AllowDoubleBuffering(PRBool aDoubleBuffer)=0;
 
+  /**
+   * Indicate whehter the viewmanager is currently painting
+   *
+   * @param aPainting PR_TRUE if the viewmanager is painting
+   *                  PR_FALSE otherwise
+   */
+  NS_IMETHOD IsPainting(PRBool& aIsPainting)=0;
+
 };
 
 //when the refresh happens, should it be double buffered?

view/src/nsViewManager.cpp

@@ -3636,6 +3636,13 @@ nsViewManager::AllowDoubleBuffering(PRBool aDoubleBuffer)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsViewManager::IsPainting(PRBool& aIsPainting)
+{
+  aIsPainting = mPainting;
+  return NS_OK;
+}
+
 nsresult
 nsViewManager::ProcessWidgetChanges(nsIView* aView)
 {

view/src/nsViewManager.h

@@ -160,6 +160,7 @@ public:
   NS_IMETHOD IsCachingWidgetChanges(PRBool* aCaching);
   NS_IMETHOD CacheWidgetChanges(PRBool aCache);
   NS_IMETHOD AllowDoubleBuffering(PRBool aDoubleBuffer);
+  NS_IMETHOD IsPainting(PRBool& aIsPainting);
 protected:
   virtual ~nsViewManager();
 

view/src/nsViewManager2.cpp

@@ -2898,6 +2898,14 @@ nsViewManager2::AllowDoubleBuffering(PRBool aDoubleBuffer)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsViewManager2::IsPainting(PRBool& aIsPainting)
+{
+  aIsPainting = mPainting;
+  return NS_OK;
+}
+
+
 nsresult
 nsViewManager2::ProcessWidgetChanges(nsIView* aView)
 {

view/src/nsViewManager2.h

@@ -158,6 +158,7 @@ public:
   NS_IMETHOD IsCachingWidgetChanges(PRBool* aCaching);
   NS_IMETHOD CacheWidgetChanges(PRBool aCache);
   NS_IMETHOD AllowDoubleBuffering(PRBool aDoubleBuffer);
+  NS_IMETHOD IsPainting(PRBool& aIsPainting);
 protected:
   virtual ~nsViewManager2();