added new caret api implementation from new nsicaret api. EraseCaret. erase the caret without messing with visibility. forces a refresh of state to mDrawn=0; r=hyatt, bug = 34896

layout/base/nsCaret.cpp

@@ -327,14 +327,23 @@ NS_IMETHODIMP nsCaret::ClearFrameRefs(nsIFrame* aFrame)
 	return NS_OK;	
 }
 
+NS_IMETHODIMP nsCaret::EraseCaret()
+{
+  if (mDrawn)
+    DrawCaret();
+  return NS_OK;
+}
+
 
 #ifdef XP_MAC
 #pragma mark -
 #endif
 
 //-----------------------------------------------------------------------------
-NS_IMETHODIMP nsCaret::NotifySelectionChanged(nsIDOMDocument *, nsIDOMSelection *aDomSel, short)
+NS_IMETHODIMP nsCaret::NotifySelectionChanged(nsIDOMDocument *, nsIDOMSelection *aDomSel, short aReason)
 {
+  if (aReason & nsIDOMSelectionListener::MOUSEUP_REASON)//this wont do
+    return NS_OK;
 	if (mVisible)
 		StopBlinking();
   nsCOMPtr<nsIDOMSelection> domSel(do_QueryReferent(mDomSelectionWeak));
@@ -665,6 +674,7 @@ void nsCaret::DrawCaretWithContext(nsIRenderingContext* inRendContext)
 	localRC->SetColor(NS_RGB(255,255,255));
 	localRC->InvertRect(mCaretRect);
 	ToggleDrawnStatus();
+
 }
 
 //-----------------------------------------------------------------------------

layout/base/nsCaret.h

@@ -59,6 +59,7 @@ class nsCaret : public nsICaret,
   	NS_IMETHOD    SetCaretReadOnly(PRBool inMakeReadonly);
 		NS_IMETHOD 		GetWindowRelativeCoordinates(nsRect& outCoordinates, PRBool& outIsCollapsed, nsIDOMSelection *inDOMSel);
 		NS_IMETHOD 		ClearFrameRefs(nsIFrame* aFrame);
+		NS_IMETHOD 		EraseCaret();
 	
 	  //nsIDOMSelectionListener interface
 	  NS_IMETHOD    NotifySelectionChanged(nsIDOMDocument *aDoc, nsIDOMSelection *aSel, short aReason);

layout/base/src/nsCaret.cpp

@@ -327,14 +327,23 @@ NS_IMETHODIMP nsCaret::ClearFrameRefs(nsIFrame* aFrame)
 	return NS_OK;	
 }
 
+NS_IMETHODIMP nsCaret::EraseCaret()
+{
+  if (mDrawn)
+    DrawCaret();
+  return NS_OK;
+}
+
 
 #ifdef XP_MAC
 #pragma mark -
 #endif
 
 //-----------------------------------------------------------------------------
-NS_IMETHODIMP nsCaret::NotifySelectionChanged(nsIDOMDocument *, nsIDOMSelection *aDomSel, short)
+NS_IMETHODIMP nsCaret::NotifySelectionChanged(nsIDOMDocument *, nsIDOMSelection *aDomSel, short aReason)
 {
+  if (aReason & nsIDOMSelectionListener::MOUSEUP_REASON)//this wont do
+    return NS_OK;
 	if (mVisible)
 		StopBlinking();
   nsCOMPtr<nsIDOMSelection> domSel(do_QueryReferent(mDomSelectionWeak));
@@ -665,6 +674,7 @@ void nsCaret::DrawCaretWithContext(nsIRenderingContext* inRendContext)
 	localRC->SetColor(NS_RGB(255,255,255));
 	localRC->InvertRect(mCaretRect);
 	ToggleDrawnStatus();
+
 }
 
 //-----------------------------------------------------------------------------

layout/base/src/nsCaret.h

@@ -59,6 +59,7 @@ class nsCaret : public nsICaret,
   	NS_IMETHOD    SetCaretReadOnly(PRBool inMakeReadonly);
 		NS_IMETHOD 		GetWindowRelativeCoordinates(nsRect& outCoordinates, PRBool& outIsCollapsed, nsIDOMSelection *inDOMSel);
 		NS_IMETHOD 		ClearFrameRefs(nsIFrame* aFrame);
+		NS_IMETHOD 		EraseCaret();
 	
 	  //nsIDOMSelectionListener interface
 	  NS_IMETHOD    NotifySelectionChanged(nsIDOMDocument *aDoc, nsIDOMSelection *aSel, short aReason);