Issue #276 - introduce class BSTR_Argument

src/plugin/PluginDomTraverserBase.h

 #ifndef _PLUGIN_DOM_TRAVERSER_BASE_H_
 #define _PLUGIN_DOM_TRAVERSER_BASE_H_
 
-
+#include "COM_Value.h"
 #include "PluginTypedef.h"
 #include "PluginTab.h"
 
-
 class CPluginDomTraverserCacheBase
 {
 public:
 
   long m_elements;
 
   CPluginDomTraverserCacheBase() : m_elements(0) {};
   void Init() { m_elements=0; }
 };
 
@@ skipping 196 matching lines @@
     {
       CComVariant vIndex(i);
       CComVariant vRetIndex;
       CComPtr<IDispatch> pFrameDispatch;
 
       if (SUCCEEDED(pFrameCollection->item(vIndex, vRetIndex, &pFrameDispatch)) && pFrameDispatch)
       {
         CComQIPtr<IWebBrowser2> pFrameBrowser = pFrameDispatch;
         if (pFrameBrowser)
         {
-          CComBSTR bstrSrc;
           CString src;
-
-          if (SUCCEEDED(pFrameBrowser->get_LocationURL(&bstrSrc)))
+          AdblockPlus::COM::BSTR_Argument result;
+          if (SUCCEEDED(pFrameBrowser->get_LocationURL(&result)))
           {
-            src = bstrSrc;
+            src = to_CString(result);
             CPluginClient::UnescapeUrl(src);
           }
 
           if (!src.IsEmpty())
           {
             TraverseDocument(pFrameBrowser, false, indent);
           }
         }
       }
     }
@@ skipping 124 matching lines @@
   }
 
   // Update cache
   m_criticalSection.Lock();
   {
     m_cacheElements[cacheIndex].m_elements = allElementsCount;
   }
   m_criticalSection.Unlock();
 
   // Get tag
-  CComBSTR bstrTag;
-  if (FAILED(pEl->get_tagName(&bstrTag)) || !bstrTag)
+  AdblockPlus::COM::BSTR_Argument result;
+  if (FAILED(pEl->get_tagName(&result)) || !result.operator std::wstring().empty())
   {
     return;
   }
 
-  CString tag = bstrTag;
+  CString tag = to_CString(result);
   tag.MakeLower();
 
   // Custom OnElement
   if (!OnElement(pEl, tag, &m_cacheElements[cacheIndex], false, indent))
   {
     return;
   }
 
   // Update frame/iframe cache
   if (tag == "iframe")
@@ skipping 68 matching lines @@
   if (tab->m_plugin->GetTabHWND() == NULL)
   {
     return;
   }
 
 
 }
 
 
 #endif // _PLUGIN_DOM_TRAVERSER_BASE_H_