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

compiled/tools.h

+#ifndef ADBLOCKPLUS_TOOLS_H
+#define ADBLOCKPLUS_TOOLS_H
+
+#include <emscripten.h>
+#include <cstddef>
+#include <string>
+
+#define PROPERTY(classprefix, type, name) \
+    private:\
+      type name;\
+    public:\
+      type get_##name()\
+      {\
+        return name;\
+      }\
+      void set_##name(type value)\
+      {\
+        if (name != value)\
+        {\
+          type oldvalue = value;\
+          name = value;\
+          /* TODO FilterNotifier.triggerListeners(#classprefix "." #name, this, value, oldValue); */\
+        }\
+      }
+
+#define EXPOSE_PROPERTY(class, t, name) \
+    t EMSCRIPTEN_KEEPALIVE class##_get_##name(class* obj)\
+    {\
+      return obj->get_##name();\
+    }\
+    void EMSCRIPTEN_KEEPALIVE class##_set_##name(class* obj, t value)\
+    {\
+      obj->set_##name(value);\
+    }
+
+#define FILTER_PROPERTY(type, name) PROPERTY(filter, type, name)
+
+char16_t* stringToBuffer(const std::u16string& str, size_t* resultLen);
+
+#endif