[XForms] Fix excessive refreshing for delegate controls. Bug 327985, r=aaronr+me, patch by surkov@dc.baikal.ru

extensions/xforms/nsXFormsDelegateStub.cpp

@@ -102,19 +102,19 @@ NS_IMETHODIMP
 nsXFormsDelegateStub::Refresh()
 {
   if (mRepeatState == eType_Template)
-    return NS_OK;
+    return NS_OK_XFORMS_NOREFRESH;
 
   const nsVoidArray* list = nsPostRefresh::PostRefreshList();
   if (list && list->IndexOf(this) >= 0) {
     // This control will be refreshed later.
-    return NS_OK;
+    return NS_OK_XFORMS_NOREFRESH;
   }
 
   SetMozTypeAttribute();
 
   nsCOMPtr<nsIXFormsUIWidget> widget = do_QueryInterface(mElement);
   if (!widget)
-    return NS_OK;
+    return NS_ERROR_FAILURE;
 
   return widget->Refresh();
 }
@@ -224,6 +224,10 @@ nsXFormsDelegateStub::UpdateRepeatState()
       mRepeatState = eType_Template;
       break;
     }
+    if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("itemset"))) {
+      mRepeatState = eType_Template;
+      break;
+    }
     nsCOMPtr<nsIDOMNode> tmp;
     parent->GetParentNode(getter_AddRefs(tmp));
     parent = tmp;

extensions/xforms/nsXFormsLabelElement.cpp

@@ -259,7 +259,10 @@ nsXFormsLabelElement::LoadExternalLabel(const nsAString& aSrc)
 NS_IMETHODIMP
 nsXFormsLabelElement::Refresh()
 {
-  nsXFormsDelegateStub::Refresh();
+  nsresult rv = nsXFormsDelegateStub::Refresh();
+  if (NS_FAILED(rv) || rv == NS_OK_XFORMS_NOREFRESH)
+    return rv;
+
   nsCOMPtr<nsIDOMNode> parent;
   mElement->GetParentNode(getter_AddRefs(parent));
 

extensions/xforms/nsXFormsOutputElement.cpp

@@ -85,6 +85,7 @@ public:
 private:
   PRBool   mHasBinding;
   nsString mValue;
+  PRBool   mValueIsDirty;
 };
 
 // nsIXFormsControl
@@ -142,43 +143,35 @@ nsXFormsOutputElement::Bind()
 NS_IMETHODIMP
 nsXFormsOutputElement::Refresh()
 {
-  if (mRepeatState == eType_Template)
-    return NS_OK;
-
-  nsresult rv = NS_OK;
-  SetDOMStringToNull(mValue);
-
-  if (mModel) {
-    if (mHasBinding) {
-      if (mBoundNode) {
-        nsXFormsUtils::GetNodeValue(mBoundNode, mValue);
-      }
-    } else {
-      nsCOMPtr<nsIDOMXPathResult> result;
-      rv = ProcessNodeBinding(NS_LITERAL_STRING("value"),
-                              nsIDOMXPathResult::STRING_TYPE,
-                              getter_AddRefs(result));
-      NS_ENSURE_SUCCESS(rv, rv);
-  
-      if (result) {
-        rv = result->GetStringValue(mValue);
-        NS_ENSURE_SUCCESS(rv, rv);
-      }
-    }
-  }
-
-  SetMozTypeAttribute();
-
-  nsCOMPtr<nsIXFormsUIWidget> widget = do_QueryInterface(mElement);
-  if (widget)
-    widget->Refresh();
-
-  return rv;
+  mValueIsDirty = PR_TRUE;
+  return nsXFormsDelegateStub::Refresh();
 }
 
 NS_IMETHODIMP
 nsXFormsOutputElement::GetValue(nsAString& aValue)
 {
+  NS_ENSURE_STATE(mModel);
+
+  if (mValueIsDirty) {
+    if (mHasBinding) {
+      NS_ENSURE_STATE(mBoundNode);
+      nsXFormsUtils::GetNodeValue(mBoundNode, mValue);
+    } else {
+      nsCOMPtr<nsIDOMXPathResult> result;
+      nsresult rv = ProcessNodeBinding(NS_LITERAL_STRING("value"),
+                                       nsIDOMXPathResult::STRING_TYPE,
+                                       getter_AddRefs(result));
+      NS_ENSURE_SUCCESS(rv, rv);
+
+      if (result) {
+        SetDOMStringToNull(mValue);
+        rv = result->GetStringValue(mValue);
+        NS_ENSURE_SUCCESS(rv, rv);
+      }
+    }
+    mValueIsDirty = PR_FALSE;
+  }
+
   aValue = mValue;
   return NS_OK;
 }

extensions/xforms/nsXFormsUploadElement.cpp

@@ -121,7 +121,8 @@ nsXFormsUploadElement::Refresh()
   // type 'anyURI', 'base64Binary', or 'hexBinary'.
 
   nsresult rv = nsXFormsDelegateStub::Refresh();
-  NS_ENSURE_SUCCESS(rv, rv);
+  if (NS_FAILED(rv) || rv == NS_OK_XFORMS_NOREFRESH)
+    return rv;
 
   if (!mBoundNode)
     return NS_OK;

extensions/xforms/nsXFormsUtils.h

@@ -66,6 +66,13 @@ class nsIDOMEvent;
 #define NS_NAMESPACE_SOAP_ENVELOPE       "http://schemas.xmlsoap.org/soap/envelope/"
 #define NS_NAMESPACE_MOZ_XFORMS_LAZY     "http://www.mozilla.org/projects/xforms/2005/lazy"
 
+/**
+ * Error codes
+ */
+
+#define NS_OK_XFORMS_NOREFRESH \
+NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_GENERAL, 1)
+
 /**
  * XForms event types
  *