Added the Equals method

widget/public/nsIDataFlavor.h

@@ -43,6 +43,8 @@
 #define kGIFImageMime  "image/gif"
 #define kDropFilesMime "text/dropfiles"
 
+class nsIDataFlavor;
+
 class nsIDataFlavor : public nsISupports {
 
   public:
@@ -62,14 +64,22 @@ class nsIDataFlavor : public nsISupports {
     *
     * @param  aMimeStr string to be set
     */
-    NS_IMETHOD GetMimeType(nsString & aMimeStr) = 0;
+    NS_IMETHOD GetMimeType(nsString & aMimeStr) const = 0;
 
   /**
     * Gets the Human readable version of the mime string 
     *
     * @param  aReadableStr string to be set
     */
-    NS_IMETHOD GetHumanPresentableName(nsString & aReadableStr) = 0;
+    NS_IMETHOD GetHumanPresentableName(nsString & aReadableStr) const = 0;
+
+  /**
+    * Check to see if aDataFlavor's Mime type is the same 
+    *
+    * @param  aDataFlavor flavor to check
+    * @returns NS_OK if the Mime Type string are identical otherwise, it returns NS_ERROR_FAILURE
+    */
+    NS_IMETHOD Equals(const nsIDataFlavor * aDataFlavor) = 0;
 
 
 };

widget/src/xpwidgets/nsDataFlavor.cpp

@@ -86,7 +86,7 @@ NS_METHOD nsDataFlavor::Init(const nsString & aMimeType, const nsString & aHuman
   * 
   *
   */
-NS_METHOD nsDataFlavor::GetMimeType(nsString & aMimeStr)
+NS_METHOD nsDataFlavor::GetMimeType(nsString & aMimeStr) const
 {
   aMimeStr = mMimeType;
   return NS_OK;
@@ -96,7 +96,7 @@ NS_METHOD nsDataFlavor::GetMimeType(nsString & aMimeStr)
   * 
   *
   */
-NS_METHOD nsDataFlavor::GetHumanPresentableName(nsString & aHumanPresentableName)
+NS_METHOD nsDataFlavor::GetHumanPresentableName(nsString & aHumanPresentableName) const
 {
   aHumanPresentableName = mHumanPresentableName;
   return NS_OK;
@@ -106,17 +106,11 @@ NS_METHOD nsDataFlavor::GetHumanPresentableName(nsString & aHumanPresentableName
   * 
   *
   */
-NS_METHOD nsDataFlavor::GetNativeData(void ** aData)
+NS_METHOD nsDataFlavor::Equals(const nsIDataFlavor * aDataFlavor)
 {
-  return NS_OK;
-}
-
-/**
-  * 
-  *
-  */
-NS_METHOD nsDataFlavor::SetNativeData(void * aData)
-{
-  return NS_OK;
+  nsString mimeInQues;
+  aDataFlavor->GetMimeType(mimeInQues);
+
+  return (mMimeType.Equals(mimeInQues)?NS_OK:NS_ERROR_FAILURE);
 }
 

widget/src/xpwidgets/nsDataFlavor.h

@@ -41,22 +41,14 @@ public:
   //nsIDataFlavor
   NS_IMETHOD Init(const nsString & aMimeType, 
                   const nsString & aHumanPresentableName);
-  NS_IMETHOD GetMimeType(nsString & aMimeStr);
-  NS_IMETHOD GetHumanPresentableName(nsString & aReadableStr);
-
-  NS_IMETHOD GetNativeData(void ** aData);
-  NS_IMETHOD SetNativeData(void * aData);
-
-
-  // Native Methods
-  PRUint32 GetFormat() { return mNativeClipboardFormat; }
+  NS_IMETHOD GetMimeType(nsString & aMimeStr) const;
+  NS_IMETHOD GetHumanPresentableName(nsString & aReadableStr) const;
+  NS_IMETHOD Equals(const nsIDataFlavor * aDataFlavor);
 
 protected:
   nsString mMimeType;
   nsString mHumanPresentableName;
 
-  PRUint32 mNativeClipboardFormat;
-
 };
 
 #endif // nsDataFlavor_h__