Use security URL from wxWebViewHandler in wxWebViewIE

Don't use hard-coded 'http://localhost', but use the URL specified in the
wxWebViewHandler.

By default, the security URL is empty and no modifications are made when
parsing a URL. This fixes using JavaScript in pages loaded with a custom
protocol, e.g. from wxWebViewFSHandler or wxWebViewArchiveHandler.

Closes #17893

src/msw/webview_ie.cpp

@@ -1762,27 +1762,25 @@ HRESULT STDMETHODCALLTYPE VirtualProtocol::ParseUrl(
         DWORD dwReserved)
 {
     wxUnusedVar(pwzUrl);
-    wxUnusedVar(ParseAction);
     wxUnusedVar(dwParseFlags);
-    wxUnusedVar(pwzResult);
-    wxUnusedVar(cchResult);
-    wxUnusedVar(pcchResult);
     wxUnusedVar(dwReserved);
 
+    const size_t secLen = m_handler->GetSecurityURL().length();
+    if ( secLen > 0 )
+    {
         switch ( ParseAction )
         {
             case wxPARSE_SECURITY_URL:
             case wxPARSE_SECURITY_DOMAIN:
             {
-            const wchar_t Result[] = L"http://localhost";
+                if ( cchResult <= secLen )
-            size_t Len = wcslen(Result);
-            if(cchResult <= Len)
                     return S_FALSE;
-            wcscpy(pwzResult, Result);
+                wcscpy(pwzResult, m_handler->GetSecurityURL().wc_str());
-            *pcchResult = Len;
+                *pcchResult = secLen;
                 return S_OK;
             }
         }
+    }
 
     return INET_E_DEFAULT_ACTION;
 }