From 6d76ab9b6c19d0829c343e1bc3cd7865221d64ba Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Fri, 17 Apr 2020 07:43:03 -0400
Subject: Bug 1360154 - nsIPlaintextEditor might have to have hasText property
 for UpdateOverlayTextVisibility

* DocumentIsBody should return bool, not nsresult
* Add fast path to check whether valus is emtpy

Tag #1375
---
 editor/libeditor/HTMLEditor.cpp    | 10 +++-------
 editor/libeditor/TextEditRules.cpp |  9 +++------
 editor/libeditor/TextEditRules.h   |  2 +-
 editor/libeditor/TextEditor.cpp    |  6 +++---
 editor/libeditor/nsIEditRules.h    |  2 +-
 5 files changed, 11 insertions(+), 18 deletions(-)

(limited to 'editor')

diff --git a/editor/libeditor/HTMLEditor.cpp b/editor/libeditor/HTMLEditor.cpp
index 04a710cde..c2f0bdc6d 100644
--- a/editor/libeditor/HTMLEditor.cpp
+++ b/editor/libeditor/HTMLEditor.cpp
@@ -3530,15 +3530,11 @@ 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);
   }
diff --git a/editor/libeditor/TextEditRules.cpp b/editor/libeditor/TextEditRules.cpp
index 8f8f34e8b..35d4a2f3d 100644
--- a/editor/libeditor/TextEditRules.cpp
+++ b/editor/libeditor/TextEditRules.cpp
@@ -329,13 +329,10 @@ 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
diff --git a/editor/libeditor/TextEditRules.h b/editor/libeditor/TextEditRules.h
index 6d4915f15..208e14d23 100644
--- a/editor/libeditor/TextEditRules.h
+++ b/editor/libeditor/TextEditRules.h
@@ -66,7 +66,7 @@ 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:
diff --git a/editor/libeditor/TextEditor.cpp b/editor/libeditor/TextEditor.cpp
index 9d07c198b..c3cfa4a72 100644
--- a/editor/libeditor/TextEditor.cpp
+++ b/editor/libeditor/TextEditor.cpp
@@ -913,7 +913,8 @@ 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
@@ -1580,8 +1581,7 @@ 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);
diff --git a/editor/libeditor/nsIEditRules.h b/editor/libeditor/nsIEditRules.h
index b186895ae..a493145cc 100644
--- a/editor/libeditor/nsIEditRules.h
+++ b/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;
 };
 
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