Issue 5142 - Convert Element Hiding to C++

compiled/ElemHide.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /**
  * @fileOverview Element hiding implementation.
  */
 
 #pragma once
 
-#include <unordered_map>
 #include <vector>
 
 #include "bindings/runtime.h"
 #include "intrusive_ptr.h"
 #include "StringMap.h"
 #include "filter/Filter.h"
 #include "filter/ElemHideBase.h"
 #include "filter/ElemHideException.h"
 
 class ElemHide_SelectorList : public ref_counted
@@ skipping 16 matching lines @@
   {
     mSelectors.insert(mSelectors.end(),
                       list.mSelectors.cbegin(), list.mSelectors.cend());
   }
 };
 
 class ElemHide : public ref_counted
 {
   // All filters. Key is filter text. Exception filters excluded.
   StringMap<ElemHideBasePtr> mFilters;
-  // StringMap is non copyable. std::unordered_map<> it is
-  // Filters by domain. Key is domain. Subkey is filter text.
-  StringMap<std::unordered_map<DependentString,ElemHideBasePtr,StringHash>> mFiltersByDomain;
+  // Filters by domain. Key is domain.
+  // In value key is filter text, value is filter or NULL
+  OwnedStringMap<OwnedStringMap<ElemHideBasePtr>> mFiltersByDomain;
 
   // Exceptions. The key is the selector.
   OwnedStringMap<std::vector<ElemHideExceptionPtr>> mExceptions;
   // Known exceptions. Filter text as keys.
   StringSet mKnownExceptions;
 
-  // Unconditional selectors. Filter text as key
-  StringSet mUnconditionalSelectors;
+  // Unconditional selectors. Filter selector as key. Filter as value.
+  OwnedStringMap<ElemHideBasePtr> mUnconditionalSelectors;
 
   mutable intrusive_ptr<ElemHide_SelectorList> mUnconditionalSelectorsCache;
 
-  ElemHide()
-  {
-    if (defaultDomains.size() == 0)
-      defaultDomains[ActiveFilter::DEFAULT_DOMAIN] = true;
-  }
 public:
   static ElemHide* BINDINGS_EXPORTED Create()
   {
     return new ElemHide();
   }
   // Used by GetSelectorsForDomain to narrow down selectors to return.
+  // Keep these value up to date in the ElemHide.js import script.
   enum Criteria
   {
     // Return all selectors applying to a particular hostname.
     ALL_MATCHING = 0,
     // Exclude selectors which apply to all websites without exception.
     NO_UNCONDITIONAL = 1,
     // Return only selectors for filters which specifically match the
     // given host name.
     SPECIFIC_ONLY = 2,
   };
 
   void BINDINGS_EXPORTED Clear();
   void BINDINGS_EXPORTED Add(ElemHideBase& filter);
   void BINDINGS_EXPORTED Remove(ElemHideBase& filter);
 
   ElemHide_SelectorList* BINDINGS_EXPORTED GetSelectorsForDomain(const String& domain,
                                                                  Criteria criteria) const;
   ElemHide_SelectorList* BINDINGS_EXPORTED GetUnconditionalSelectors() const;
 
   ElemHideException* BINDINGS_EXPORTED GetException(const ElemHideBase& filter,
                                                     DependentString& docDomain) const;
 
 private:
-  static ActiveFilter::DomainMap defaultDomains;
-  void AddToFiltersByDomain(ElemHideBase& filter);
+  void AddToFiltersByDomain(const ElemHideBasePtr & filter);
 };