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

compiled/bindings.cpp

+#include <emscripten.h>
+
+#include "bindings.h"
+#include "String.h"
+#include "intrusive_ptr.h"
+#include "Filter.h"
+#include "InvalidFilter.h"
+#include "CommentFilter.h"
+#include "ActiveFilter.h"
+#include "RegExpFilter.h"
+#include "WhitelistFilter.h"
+#include "ElemHideBase.h"
+#include "ElemHideFilter.h"
+#include "ElemHideException.h"
+#include "CSSPropertyFilter.h"
+
+extern "C"
+{
+  void EMSCRIPTEN_KEEPALIVE InitString(String* str, String::value_type* data,
+      String::size_type len)
+  {
+    // String is already allocated on stack, we merely need to call constructor.
+    new (str) String(data, len);
+  }
+
+  void EMSCRIPTEN_KEEPALIVE DestroyString(String* str)
+  {
+    // Stack memory will be freed automatically, we need to call destructor
+    // explicitly however.
+    str->~String();
+  }
+
+  String::size_type EMSCRIPTEN_KEEPALIVE GetStringLength(const String& str)
+  {
+    return str.length();
+  }
+
+  const String::value_type* EMSCRIPTEN_KEEPALIVE GetStringData(const String& str)
+  {
+    return str.data();
+  }
+
+  void EMSCRIPTEN_KEEPALIVE AddRef(ref_counted* ptr)
+  {
+    ptr->AddRef();
+  }
+
+  void EMSCRIPTEN_KEEPALIVE ReleaseRef(ref_counted* ptr)
+  {
+    ptr->ReleaseRef();
+  }
+}
+
+#if defined(PRINT_BINDINGS)
+EMSCRIPTEN_BINDINGS(api)
+{
+  class_<Filter>("Filter")
+      .property("text", &Filter::GetText)
+      .function("serialize", &Filter::Serialize)
+      .class_function("fromText", &Filter::FromText)
+      .class_function("normalize", &Filter::Normalize)
+      .subclass_differentiator(&Filter::GetType, {
+        {Filter::Type::INVALID, "InvalidFilter"},
+        {Filter::Type::COMMENT, "CommentFilter"},
+        {Filter::Type::BLOCKING, "RegExpFilter"},
+        {Filter::Type::WHITELIST, "WhitelistFilter"},
+        {Filter::Type::ELEMHIDE, "ElemHideFilter"},
+        {Filter::Type::ELEMHIDEEXCEPTION, "ElemHideException"},
+        {Filter::Type::CSSPROPERTY, "CSSPropertyFilter"},
+      });
+
+  class_<InvalidFilter,Filter>("InvalidFilter")
+      .class_property("type", "'invalid'")
+      .property("reason", &InvalidFilter::GetReason);
+
+  class_<CommentFilter,Filter>("CommentFilter")
+      .class_property("type", "'comment'");
+
+  class_<ActiveFilter,Filter>("ActiveFilter")
+      .property("disabled", &ActiveFilter::GetDisabled, &ActiveFilter::SetDisabled)
+      .property("hitCount", &ActiveFilter::GetHitCount, &ActiveFilter::SetHitCount)
+      .property("lastHit", &ActiveFilter::GetLastHit, &ActiveFilter::SetLastHit)
+      .function("isActiveOnDomain", &ActiveFilter::IsActiveOnDomain)
+      .function("isActiveOnlyOnDomain", &ActiveFilter::IsActiveOnlyOnDomain)
+      .function("isGeneric", &ActiveFilter::IsGeneric)
+      .function("serialize", &ActiveFilter::Serialize);
+
+  class_<RegExpFilter,ActiveFilter>("RegExpFilter")
+      .class_property("type", "'blocking'")
+      .function("matches", &RegExpFilter::Matches)
+      .class_initializer(&RegExpFilter::InitJSTypes);
+
+  class_<WhitelistFilter,RegExpFilter>("WhitelistFilter")
+      .class_property("type", "'whitelist'");
+
+  class_<ElemHideBase,ActiveFilter>("ElemHideBase")
+      .property("selector", &ElemHideBase::GetSelector)
+      .property("selectorDomain", &ElemHideBase::GetSelectorDomain);
+
+  class_<ElemHideFilter,ElemHideBase>("ElemHideFilter")
+      .class_property("type", "'elemhide'");
+
+  class_<ElemHideException,ElemHideBase>("ElemHideException")
+      .class_property("type", "'elemhideexception'");
+
+  class_<CSSPropertyFilter,ElemHideBase>("CSSPropertyFilter")
+      .class_property("type", "'cssproperty'")
+      .property("regexpString", &CSSPropertyFilter::GetRegExpString)
+      .property("selectorPrefix", &CSSPropertyFilter::GetSelectorPrefix)
+      .property("selectorSuffix", &CSSPropertyFilter::GetSelectorSuffix);
+}
+#endif