Issue 1793 - check whether the frame is whitelisted before injecting CSS

src/plugin/PluginTabBase.cpp

Index: src/plugin/PluginTabBase.cpp
diff --git a/src/plugin/PluginTabBase.cpp b/src/plugin/PluginTabBase.cpp
index 7422d417c812d2f3c586d4e359a39502c0a96f02..ede52235f9dc117bd84713756b42c9486f1ce642 100644
--- a/src/plugin/PluginTabBase.cpp
+++ b/src/plugin/PluginTabBase.cpp
@@ -177,6 +177,51 @@ void CPluginTabBase::InjectABP(IWebBrowser2* browser)
   }
 }
 
+namespace
+{
+  ATL::CComPtr<IWebBrowser2> GetParent(IWebBrowser2& browser)
+  {
+    ATL::CComPtr<IDispatch> parentDispatch;
+    if (FAILED(browser.get_Parent(&parentDispatch)) || !parentDispatch)
+    {
+      return nullptr;
+    }
+    // The InternetExplorer application always returns a pointer to itself.
+    if (parentDispatch.IsEqualObject(&browser))
+    {
+      return nullptr;
+    }
+    ATL::CComQIPtr<IServiceProvider> parentDocumentServiceProvider = parentDispatch;
+    if (!parentDocumentServiceProvider)
+    {
+      return nullptr;
+    }
+    ATL::CComPtr<IWebBrowserApp> webBrowserApp;
+    if (FAILED(parentDocumentServiceProvider->QueryService(IID_IWebBrowserApp, &webBrowserApp)) || !webBrowserApp)
+    {
+      return nullptr;
+    }
+    return ATL::CComQIPtr<IWebBrowser2>(webBrowserApp);
+  }
+
+  bool IsFrameWhiteListed(ATL::CComPtr<IWebBrowser2> frame)
+  {
+    if (!frame)
+    {
+      return false;
+    }
+    auto url = GetLocationUrl(*frame);
+    std::vector<std::string> frameHierarchy;
+    while(frame = GetParent(*frame))
+    {
+      frameHierarchy.push_back(ToUtf8String(GetLocationUrl(*frame)));
+    }
+    CPluginClient* client = CPluginClient::GetInstance();
+    return client->IsWhitelistedUrl(url, frameHierarchy)
+        || client->IsElemhideWhitelistedOnDomain(url, frameHierarchy);
+  }
+}
+
 void CPluginTabBase::OnDownloadComplete(IWebBrowser2* browser)
 {
   CPluginClient* client = CPluginClient::GetInstance();