Add SetVisibility method to Scroll Views

Bug 92333 r=kmcclusk sr=attinasi a=asa

view/public/nsIScrollableView.h

@@ -176,6 +176,11 @@ public:
   NS_IMETHOD GetScrollbarVisibility(PRBool *aVerticalVisible,
                                     PRBool *aHorizontalVisible) const = 0;
 
+  /**
+   * Set the visible (disables the scrollbars when the are hidden)
+   */
+  NS_IMETHOD SetScrollbarVisibility(PRBool aVerticalVisible,
+                                    PRBool aHorizontalVisible) = 0;
   /**
    * Set the properties describing how scrolling can be performed
    * in this scrollable.

view/src/nsScrollPortView.cpp

@@ -345,6 +345,14 @@ NS_IMETHODIMP nsScrollPortView::GetScrollbarVisibility(PRBool *aVerticalVisible,
   return NS_OK;
 }
 
+NS_IMETHODIMP nsScrollPortView::SetScrollbarVisibility(PRBool aVerticalVisible,
+                                                       PRBool aHorizontalVisible)
+{
+  NS_WARNING("Attempt to set scrollbars visibility this is not xp!");
+  return NS_OK;
+}
+
+
 
 void nsScrollPortView::AdjustChildWidgets(nsScrollPortView *aScrolling, nsView *aView, nscoord aDx, nscoord aDy, float scale)
 {

view/src/nsScrollPortView.h

@@ -75,6 +75,8 @@ public:
   NS_IMETHOD  GetControlInsets(nsMargin &aInsets) const;
   NS_IMETHOD  GetScrollbarVisibility(PRBool *aVerticalVisible,
                                      PRBool *aHorizontalVisible) const;
+  NS_IMETHOD SetScrollbarVisibility(PRBool aVerticalVisible,
+                                    PRBool aHorizontalVisible);
   NS_IMETHOD  SetScrollProperties(PRUint32 aProperties);
   NS_IMETHOD  GetScrollProperties(PRUint32 *aProperties);
   NS_IMETHOD  SetLineHeight(nscoord aHeight);

view/src/nsScrollingView.cpp

@@ -1389,6 +1389,17 @@ NS_IMETHODIMP nsScrollingView::GetScrollbarVisibility(PRBool *aVerticalVisible,
   return NS_OK;
 }
 
+// must also disable them or they get turned back on
+NS_IMETHODIMP nsScrollingView::SetScrollbarVisibility(PRBool aVerticalVisible,
+                                                      PRBool aHorizontalVisible)
+{
+  ((ScrollBarView *)mHScrollBarView)->SetEnabled(aHorizontalVisible); 
+  ((ScrollBarView *)mVScrollBarView)->SetEnabled(aVerticalVisible); 
+  mHScrollBarView->SetVisibility(aHorizontalVisible?nsViewVisibility_kShow:nsViewVisibility_kHide);
+  mVScrollBarView->SetVisibility(aVerticalVisible?nsViewVisibility_kShow:nsViewVisibility_kHide);
+  return NS_OK;
+}
+
 void nsScrollingView::AdjustChildWidgets(nsScrollingView *aScrolling, nsView *aView,
                                          nscoord aDx, nscoord aDy, float scale)
 {

view/src/nsScrollingView.h

@@ -89,6 +89,8 @@ public:
   NS_IMETHOD  GetControlInsets(nsMargin &aInsets) const;
   NS_IMETHOD  GetScrollbarVisibility(PRBool *aVerticalVisible,
                                      PRBool *aHorizontalVisible) const;
+  NS_IMETHOD SetScrollbarVisibility(PRBool aVerticalVisible,
+                                    PRBool aHorizontalVisible);
   NS_IMETHOD  SetScrollProperties(PRUint32 aProperties);
   NS_IMETHOD  GetScrollProperties(PRUint32 *aProperties);
   NS_IMETHOD  SetLineHeight(nscoord aHeight);