Implement user agent access for macOS

include/wx/osx/webview_webkit.h

@@ -73,6 +73,7 @@ public:
 
     virtual bool IsAccessToDevToolsEnabled() const wxOVERRIDE;
     virtual void EnableAccessToDevTools(bool enable = true) wxOVERRIDE;
+    virtual bool SetUserAgent(const wxString& userAgent) wxOVERRIDE;
 
     //History functions
     virtual void ClearHistory() wxOVERRIDE;
@@ -111,6 +112,7 @@ protected:
 private:
     OSXWebViewPtr m_webView;
     wxStringToWebHandlerMap m_handlers;
+    wxString m_customUserAgent;
 
     WX_NSObject m_navigationDelegate;
     WX_NSObject m_UIDelegate;

src/osx/webview_webkit.mm

@@ -151,6 +151,9 @@ bool wxWebViewWebKit::Create(wxWindow *parent,
 
     MacPostControlCreate(pos, size);
 
+    if (!m_customUserAgent.empty())
+        SetUserAgent(m_customUserAgent);
+
     [m_webView setHidden:false];
 
 
@@ -328,6 +331,21 @@ void wxWebViewWebKit::EnableAccessToDevTools(bool enable)
         [prefs performSelector:devToolsSelector withObject:(id)enable];
 }
 
+bool wxWebViewWebKit::SetUserAgent(const wxString& userAgent)
+{
+    if (WX_IS_MACOS_AVAILABLE(10, 11))
+    {
+        if (m_webView)
+            m_webView.customUserAgent = wxCFStringRef(userAgent).AsNSString();
+        else
+            m_customUserAgent = userAgent;
+
+        return true;
+    }
+    else
+        return false;
+}
+
 void wxWebViewWebKit::SetZoomType(wxWebViewZoomType zoomType)
 {
     // there is only one supported zoom type at the moment so this setter