Bug 221820 - Part 2: Make the editor initialization lazy (initialize only when needed); r=bzbarsky

layout/forms/nsTextControlFrame.h

@@ -275,17 +275,29 @@ protected:
    * @return whether this control is scrollable
    */
   PRBool IsScrollable() const;
+
+  /**
+   * Update the textnode under our anonymous div to show the new
+   * value. This should only be called when we have no editor yet.
+   * @throws NS_ERROR_UNEXPECTED if the div has no text content
+   */
+  nsresult UpdateValueDisplay(PRBool aNotify,
+                              PRBool aBeforeEditorInit = PR_FALSE,
+                              const nsAString *aValue = nsnull);
+
   /**
    * Strip all \n, \r and nulls from the given string
    * @param aString the string to remove newlines from [in/out]
    */
   void RemoveNewlines(nsString &aString);
+
   /**
    * Get the maxlength attribute
    * @param aMaxLength the value of the max length attr
    * @returns PR_FALSE if attr not defined
    */
   PRBool GetMaxLength(PRInt32* aMaxLength);
+
   /**
    * Find out whether an attribute exists on the content or not.
    * @param aAtt the attribute to determine the existence of
@@ -299,9 +311,6 @@ protected:
    * @param aPresContext the current pres context
    */
   void PreDestroy();
-  /**
-   * Fire the onChange event.
-   */
 
   // Helper methods
   /**
@@ -309,10 +318,12 @@ protected:
    * @return the number of columns to use
    */
   PRInt32 GetCols();
+
   /**
    * Get the column index to wrap at, or -1 if we shouldn't wrap
    */
   PRInt32 GetWrapCols();
+
   /**
    * Get the rows attribute (if textarea) or a default
    * @return the number of rows to use