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

2 files changed, 22 insertions, 0 deletions

diff --git a/dom/html/nsTextEditorState.cpp b/dom/html/nsTextEditorState.cpp
index 25be6016c..812a8d0b6 100644
--- a/dom/html/nsTextEditorState.cpp
+++ b/dom/html/nsTextEditorState.cpp
@@ -2214,6 +2214,23 @@ nsTextEditorState::SetValue(const nsAString& aValue, uint32_t aFlags)
   return true;
 }
 
+bool
+nsTextEditorState::HasNonEmptyValue()
+{
+  if (mEditor && mBoundFrame && mEditorInitialized &&
+      !mIsCommittingComposition) {
+    bool empty;
+    nsresult rv = mEditor->GetDocumentIsEmpty(&empty);
+    if (NS_SUCCEEDED(rv)) {
+      return !empty;
+    }
+  }
+
+  nsAutoString value;
+  GetValue(value, true);
+  return !value.IsEmpty();
+}
+
 void
 nsTextEditorState::InitializeKeyboardEventListeners()
 {
diff --git a/dom/html/nsTextEditorState.h b/dom/html/nsTextEditorState.h
index caf5e8eed..77d12e81a 100644
--- a/dom/html/nsTextEditorState.h
+++ b/dom/html/nsTextEditorState.h
@@ -157,6 +157,11 @@ public:
   };
   MOZ_MUST_USE bool SetValue(const nsAString& aValue, uint32_t aFlags);
   void GetValue(nsAString& aValue, bool aIgnoreWrap) const;
+  bool HasNonEmptyValue();
+  // The following methods are for textarea element to use whether default
+  // value or not.
+  // XXX We might have to add assertion when it is into editable,
+  // or reconsider fixing bug 597525 to remove these.
   void EmptyValue() { if (mValue) mValue->Truncate(); }
   bool IsEmpty() const { return mValue ? mValue->IsEmpty() : true; }