Bug 809584 - Move the placeholder visibility logic to nsTextEditorState. r=ehsan

content/html/content/public/nsITextControlElement.h

@@ -18,8 +18,8 @@ class nsTextControlFrame;
 
 // IID for the nsITextControl interface
 #define NS_ITEXTCONTROLELEMENT_IID    \
-{ 0x669bd7ca, 0x42af, 0x4f1e, \
-  { 0xa6, 0xe2, 0x86, 0xc4, 0x0a, 0x14, 0x73, 0x4e } }
+{ 0x3dd53b59, 0x9d8f, 0x40a3, \
+  { 0x81, 0xd7, 0xb3, 0x43, 0xa0, 0x51, 0xfc, 0xb5 } }
 
 /**
  * This interface is used for the text control frame to get the editor and
@@ -151,9 +151,9 @@ public:
   NS_IMETHOD_(void) InitializeKeyboardEventListeners() = 0;
 
   /**
-   * Show/hide the placeholder for the control.
+   * Update the placeholder visibility based on the element's state.
    */
-  NS_IMETHOD_(void) SetPlaceholderVisibility(bool aVisible, bool aNotify) = 0;
+  NS_IMETHOD_(void) UpdatePlaceholderVisibility(bool aNotify) = 0;
 
   /**
    * Returns the current expected placeholder visibility state.

content/html/content/src/nsHTMLInputElement.cpp

@@ -1474,11 +1474,11 @@ nsHTMLInputElement::GetPlaceholderNode()
 }
 
 NS_IMETHODIMP_(void)
-nsHTMLInputElement::SetPlaceholderVisibility(bool aVisible, bool aNotify)
+nsHTMLInputElement::UpdatePlaceholderVisibility(bool aNotify)
 {
   nsTextEditorState *state = GetEditorState();
   if (state) {
-    state->SetPlaceholderVisibility(aVisible, aNotify);
+    state->UpdatePlaceholderVisibility(aNotify);
   }
 }
 

content/html/content/src/nsHTMLInputElement.h

@@ -150,7 +150,7 @@ public:
   NS_IMETHOD_(nsIContent*) GetRootEditorNode();
   NS_IMETHOD_(nsIContent*) CreatePlaceholderNode();
   NS_IMETHOD_(nsIContent*) GetPlaceholderNode();
-  NS_IMETHOD_(void) SetPlaceholderVisibility(bool aVisible, bool aNotify);
+  NS_IMETHOD_(void) UpdatePlaceholderVisibility(bool aNotify);
   NS_IMETHOD_(bool) GetPlaceholderVisibility();
   NS_IMETHOD_(void) InitializeKeyboardEventListeners();
   NS_IMETHOD_(void) OnValueChanged(bool aNotify);

content/html/content/src/nsHTMLTextAreaElement.cpp

@@ -122,7 +122,7 @@ public:
   NS_IMETHOD_(nsIContent*) GetRootEditorNode();
   NS_IMETHOD_(nsIContent*) CreatePlaceholderNode();
   NS_IMETHOD_(nsIContent*) GetPlaceholderNode();
-  NS_IMETHOD_(void) SetPlaceholderVisibility(bool aVisible, bool aNotify);
+  NS_IMETHOD_(void) UpdatePlaceholderVisibility(bool aNotify);
   NS_IMETHOD_(bool) GetPlaceholderVisibility();
   NS_IMETHOD_(void) InitializeKeyboardEventListeners();
   NS_IMETHOD_(void) OnValueChanged(bool aNotify);
@@ -514,9 +514,9 @@ nsHTMLTextAreaElement::GetPlaceholderNode()
 }
 
 NS_IMETHODIMP_(void)
-nsHTMLTextAreaElement::SetPlaceholderVisibility(bool aVisible, bool aNotify)
+nsHTMLTextAreaElement::UpdatePlaceholderVisibility(bool aNotify)
 {
-  mState.SetPlaceholderVisibility(aVisible, aNotify);
+  mState.UpdatePlaceholderVisibility(aNotify);
 }
 
 NS_IMETHODIMP_(bool)

content/html/content/src/nsTextEditorState.cpp

@@ -1968,9 +1968,7 @@ nsTextEditorState::ValueWasChanged(bool aNotify)
     return;
   }
 
-  nsAutoString valueString;
-  GetValue(valueString, true);
-  SetPlaceholderVisibility(valueString.IsEmpty(), aNotify);
+  UpdatePlaceholderVisibility(aNotify);
 }
 
 void
@@ -1994,13 +1992,15 @@ nsTextEditorState::UpdatePlaceholderText(bool aNotify)
 }
 
 void
-nsTextEditorState::SetPlaceholderVisibility(bool aVisible,
-                                            bool aNotify)
+nsTextEditorState::UpdatePlaceholderVisibility(bool aNotify)
 {
   NS_ASSERTION(mPlaceholderDiv, "This function should not be called if "
                                 "mPlaceholderDiv isn't set");
 
-  mPlaceholderVisibility = aVisible;
+  nsAutoString value;
+  GetValue(value, true);
+
+  mPlaceholderVisibility = value.IsEmpty();
 
   if (mBoundFrame && aNotify) {
     mBoundFrame->InvalidateFrame();

content/html/content/src/nsTextEditorState.h

@@ -174,7 +174,7 @@ public:
   }
 
   // placeholder methods
-  void SetPlaceholderVisibility(bool aVisible, bool aNotify);
+  void UpdatePlaceholderVisibility(bool aNotify);
   bool GetPlaceholderVisibility() {
     return mPlaceholderVisibility;
   }

layout/forms/nsTextControlFrame.cpp

@@ -1313,11 +1313,8 @@ nsTextControlFrame::SetValueChanged(bool aValueChanged)
   NS_ASSERTION(txtCtrl, "Content not a text control element");
 
   if (mUsePlaceholder) {
-    int32_t textLength;
-    GetTextLength(&textLength);
-
     nsWeakFrame weakFrame(this);
-    txtCtrl->SetPlaceholderVisibility(!textLength, true);
+    txtCtrl->UpdatePlaceholderVisibility(true);
     if (!weakFrame.IsAlive()) {
       return;
     }
@@ -1375,7 +1372,7 @@ nsTextControlFrame::UpdateValueDisplay(bool aNotify,
   if (mUsePlaceholder && !aBeforeEditorInit)
   {
     nsWeakFrame weakFrame(this);
-    txtCtrl->SetPlaceholderVisibility(value.IsEmpty(), aNotify);
+    txtCtrl->UpdatePlaceholderVisibility(aNotify);
     NS_ENSURE_STATE(weakFrame.IsAlive());
   }