(trunk qt) #3930 - "Add URL" - auto-copy links from the clipboard

When opening the "Add URL" dialog, check the clipboard selection & clipboard proper to see if either contains a URL, magnet link, or info hash code. If it has any of those things, put that in the dialog's entry field as the default action. Patch by cantabile.

qt/add-data.h

@@ -40,6 +40,10 @@ class AddData
         QByteArray toBase64( ) const;
 
         QString readableName( ) const;
+
+    public:
+
+        static bool isSupported( const QString& str ) { return AddData(str).type != NONE; }
 };
 
 #endif