Bug 1360154 - Part 1. DocumentIsBody should return bool, not nsresult. r=masayuki

nsIEditRules::GetDocumentIsEmpty doesn't return error without null parameter, so we should use bool as return value instead.

MozReview-Commit-ID: HIoQmKu6ETF

--HG--
extra : rebase_source : 570452e7072d8e0e837bb2822c9c0ab9c0d1a8cf

editor/libeditor/HTMLEditor.cpp

@@ -3576,15 +3576,11 @@ HTMLEditor::SelectEntireDocument(Selection* aSelection)
   // Protect the edit rules object from dying
   nsCOMPtr<nsIEditRules> rules(mRules);
 
-  // get editor root node
-  nsCOMPtr<nsIDOMElement> rootElement = do_QueryInterface(GetRoot());
-
   // is doc empty?
-  bool bDocIsEmpty;
-  nsresult rv = rules->DocumentIsEmpty(&bDocIsEmpty);
-  NS_ENSURE_SUCCESS(rv, rv);
+  if (rules->DocumentIsEmpty()) {
+    // get editor root node
+    Element* rootElement = GetRoot();
 
-  if (bDocIsEmpty) {
     // if its empty dont select entire doc - that would select the bogus node
     return aSelection->Collapse(rootElement, 0);
   }

editor/libeditor/TextEditRules.cpp

@@ -326,13 +326,10 @@ TextEditRules::DidDoAction(Selection* aSelection,
   }
 }
 
-NS_IMETHODIMP
-TextEditRules::DocumentIsEmpty(bool* aDocumentIsEmpty)
+NS_IMETHODIMP_(bool)
+TextEditRules::DocumentIsEmpty()
 {
-  NS_ENSURE_TRUE(aDocumentIsEmpty, NS_ERROR_NULL_POINTER);
-
-  *aDocumentIsEmpty = (mBogusNode != nullptr);
-  return NS_OK;
+  return (mBogusNode != nullptr);
 }
 
 void

editor/libeditor/TextEditRules.h

@@ -65,7 +65,7 @@ public:
                           bool* aCancel, bool* aHandled) override;
   NS_IMETHOD DidDoAction(Selection* aSelection, RulesInfo* aInfo,
                          nsresult aResult) override;
-  NS_IMETHOD DocumentIsEmpty(bool* aDocumentIsEmpty) override;
+  NS_IMETHOD_(bool) DocumentIsEmpty() override;
   NS_IMETHOD DocumentModified() override;
 
 protected:

editor/libeditor/TextEditor.cpp

@@ -862,8 +862,8 @@ TextEditor::GetDocumentIsEmpty(bool* aDocumentIsEmpty)
 
   // Protect the edit rules object from dying
   nsCOMPtr<nsIEditRules> rules(mRules);
-
-  return rules->DocumentIsEmpty(aDocumentIsEmpty);
+  *aDocumentIsEmpty = rules->DocumentIsEmpty();
+  return NS_OK;
 }
 
 NS_IMETHODIMP
@@ -1549,8 +1549,7 @@ TextEditor::SelectEntireDocument(Selection* aSelection)
   nsCOMPtr<nsIEditRules> rules(mRules);
 
   // is doc empty?
-  bool bDocIsEmpty;
-  if (NS_SUCCEEDED(rules->DocumentIsEmpty(&bDocIsEmpty)) && bDocIsEmpty) {
+  if (rules->DocumentIsEmpty()) {
     // get root node
     nsCOMPtr<nsIDOMElement> rootElement = do_QueryInterface(GetRoot());
     NS_ENSURE_TRUE(rootElement, NS_ERROR_FAILURE);

editor/libeditor/nsIEditRules.h

@@ -59,7 +59,7 @@ public:
                           bool* aHandled) = 0;
   NS_IMETHOD DidDoAction(mozilla::dom::Selection* aSelection,
                          mozilla::RulesInfo* aInfo, nsresult aResult) = 0;
-  NS_IMETHOD DocumentIsEmpty(bool* aDocumentIsEmpty) = 0;
+  NS_IMETHOD_(bool) DocumentIsEmpty() = 0;
   NS_IMETHOD DocumentModified() = 0;
 };