Issue 4125 - [emscripten] Convert filter classes to C++

compiled/ActiveFilter.h

-#ifndef ADBLOCK_PLUS_ACTIVE_FILTER_H
-#define ADBLOCK_PLUS_ACTIVE_FILTER_H
+#pragma once
+
+#include <emscripten.h>
 
 #include "Filter.h"
-#include "api.h"
 #include "StringMap.h"
+
+#define FILTER_PROPERTY(type, name, getter, setter) \
+    private:\
+      type name;\
+    public:\
+      type EMSCRIPTEN_KEEPALIVE getter() const\
+      {\
+        return name;\
+      }\
+      void EMSCRIPTEN_KEEPALIVE setter(type value)\
+      {\
+        if (name != value)\
+        {\
+          type oldvalue = name;\
+          name = value;\
+          DependentString action(u"filter."_str #name);\
+          EM_ASM_ARGS({\
+            var filter = new (exports[Filter_mapping[$2]])($1);\
+            FilterNotifier.triggerListeners(readString($0), filter, $3, $4);\
+          }, &action, this, mType, value, oldvalue);\
+        }\
+      }
 
 class ActiveFilter : public Filter
 {
+protected:
+  typedef StringMap<bool> DomainMap;
+  typedef StringSet SitekeySet;
+  void ParseDomains(const String& domains, String::value_type separator) const;
+  void AddSitekey(const String& sitekey) const;
+  virtual DomainMap* GetDomains() const;
+  virtual SitekeySet* GetSitekeys() const;
+  mutable std::unique_ptr<DomainMap> mDomains;
+  mutable std::unique_ptr<SitekeySet> mSitekeys;
 private:
   bool mIgnoreTrailingDot;
-  typedef StringMap<bool> DomainMap;
-  typedef StringSet SitekeySet;
-protected:
-  std::unique_ptr<DomainMap> mDomains;
-  std::unique_ptr<SitekeySet> mSitekeys;
-  void ParseDomains(const String& str, char16_t separator);
-  void AddSitekey(const String& sitekey);
 public:
-  explicit ActiveFilter(const String& text,
-      bool ignoreTrailingDot);
+  explicit ActiveFilter(Type type, const String& text, bool ignoreTrailingDot);
   FILTER_PROPERTY(bool, mDisabled, GetDisabled, SetDisabled);
   FILTER_PROPERTY(unsigned int, mHitCount, GetHitCount, SetHitCount);
   FILTER_PROPERTY(unsigned int, mLastHit, GetLastHit, SetLastHit);
-  bool IsActiveOnDomain(String& docDomain,
+  bool EMSCRIPTEN_KEEPALIVE IsActiveOnDomain(DependentString& docDomain,
       const String& sitekey) const;
-  bool IsActiveOnlyOnDomain(String& docDomain) const;
-  bool IsGeneric() const;
-  String Serialize() const;
+  bool EMSCRIPTEN_KEEPALIVE IsActiveOnlyOnDomain(DependentString& docDomain) const;
+  bool EMSCRIPTEN_KEEPALIVE IsGeneric() const;
+  OwnedString EMSCRIPTEN_KEEPALIVE Serialize() const;
 };
-
-#endif