Implement HasSelection for the OSX WebKit backend.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/SOC2011_WEBVIEW@68488 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/webview_webkit.h

@@ -111,7 +111,7 @@ public:
     
     //Selection
     virtual void DeleteSelection();
-    virtual bool HasSelection() { return false; };
+    virtual bool HasSelection();
     virtual void SelectAll() {};
     virtual wxString GetSelectedText();
     virtual wxString GetSelectedSource() { return ""; }

src/osx/webview_webkit.mm

@@ -940,11 +940,24 @@ void wxWebViewWebKit::DeleteSelection()
     [(WebView*)m_webView deleteSelection];
 }
 
+bool wxWebViewWebKit::HasSelection()
+{
+    DOMRange* range = [m_webView selectedDOMRange];
+    if(!range)
+    {
+        return false;
+    }
+    else
+    {
+        return true;
+    }
+}
+
 void wxWebViewWebKit::EnableHistory(bool enable)
 {
     if ( !m_webView )
         return;
-        
+
     [m_webView setMaintainsBackForwardList:enable];
 }