Template out V8 and prepare for other JS engine implementations

src/JsValue.cpp

 /*
  * 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/>.
  */
 
 #include <vector>
 #include <AdblockPlus.h>
 
 #include "JsContext.h"
 #include "JsError.h"
 #include "Utils.h"
 
 using namespace AdblockPlus;
 
-AdblockPlus::JsValue::JsValue(AdblockPlus::JsEnginePtr jsEngine,
+template <> JSVALUEV8::JsValueTemplate(AdblockPlus::JsEnginePtr jsEngine,
       v8::Handle<v8::Value> value)
     : jsEngine(jsEngine),
       value(new v8::Global<v8::Value>(jsEngine->GetIsolate(), value))
 {
 }
 
-AdblockPlus::JsValue::JsValue(AdblockPlus::JsValue&& src)
+template <> JSVALUEV8::JsValueTemplate(JSVALUEV8&& src)
     : jsEngine(src.jsEngine),
       value(std::move(src.value))
 {
 }
 
-AdblockPlus::JsValue::JsValue(const JsValue& src)
+template <> JSVALUEV8::JsValueTemplate(const JSVALUEV8& src)
   : jsEngine(src.jsEngine)
 {
   const JsContext context(*src.jsEngine);
   value.reset(new v8::Global<v8::Value>(src.jsEngine->GetIsolate(), *src.value));
 }
 
-AdblockPlus::JsValue::~JsValue()
+template <> JSVALUEV8::~JsValueTemplate()
 {
   if (value)
   {
     const JsContext context(*jsEngine);
     value.reset();
   }
 }
 
-JsValue& AdblockPlus::JsValue::operator=(const JsValue& src)
+template <> JSVALUEV8& JSVALUEV8::operator=(const JSVALUEV8& src)
 {
   const JsContext context(*src.jsEngine);
   jsEngine = src.jsEngine;
   value.reset(new v8::Global<v8::Value>(src.jsEngine->GetIsolate(), *src.value));
 
   return *this;
 }
 
-JsValue& AdblockPlus::JsValue::operator=(JsValue&& src)
+template <> JSVALUEV8& AdblockPlus::JSVALUEV8::operator=(JSVALUEV8&& src)
 {
   jsEngine = std::move(src.jsEngine);
   value = std::move(src.value);
 
   return *this;
 }
 
-bool AdblockPlus::JsValue::IsUndefined() const
+template <> bool AdblockPlus::JSVALUEV8::IsUndefined() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IsUndefined();
 }
 
-bool AdblockPlus::JsValue::IsNull() const
+template <> bool AdblockPlus::JSVALUEV8::IsNull() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IsNull();
 }
 
-bool AdblockPlus::JsValue::IsString() const
+template <> bool AdblockPlus::JSVALUEV8::IsString() const
 {
   const JsContext context(*jsEngine);
   v8::Local<v8::Value> value = UnwrapValue();
   return value->IsString() || value->IsStringObject();
 }
 
-bool AdblockPlus::JsValue::IsNumber() const
+template <> bool AdblockPlus::JSVALUEV8::IsNumber() const
 {
   const JsContext context(*jsEngine);
   v8::Local<v8::Value> value = UnwrapValue();
   return value->IsNumber() || value->IsNumberObject();
 }
 
-bool AdblockPlus::JsValue::IsBool() const
+template <> bool AdblockPlus::JSVALUEV8::IsBool() const
 {
   const JsContext context(*jsEngine);
   v8::Local<v8::Value> value = UnwrapValue();
   return value->IsBoolean() || value->IsBooleanObject();
 }
 
-bool AdblockPlus::JsValue::IsObject() const
+template <> bool AdblockPlus::JSVALUEV8::IsObject() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IsObject();
 }
 
-bool AdblockPlus::JsValue::IsArray() const
+template <> bool AdblockPlus::JSVALUEV8::IsArray() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IsArray();
 }
 
-bool AdblockPlus::JsValue::IsFunction() const
+template <> bool AdblockPlus::JSVALUEV8::IsFunction() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IsFunction();
 }
 
-std::string AdblockPlus::JsValue::AsString() const
+template <> std::string AdblockPlus::JSVALUEV8::AsString() const
 {
   const JsContext context(*jsEngine);
   return Utils::FromV8String(UnwrapValue());
 }
 
-StringBuffer AdblockPlus::JsValue::AsStringBuffer() const
+template <> StringBuffer AdblockPlus::JSVALUEV8::AsStringBuffer() const
 {
   const JsContext context(*jsEngine);
   return Utils::StringBufferFromV8String(UnwrapValue());
 }
 
-int64_t AdblockPlus::JsValue::AsInt() const
+template <> int64_t AdblockPlus::JSVALUEV8::AsInt() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->IntegerValue();
 }
 
-bool AdblockPlus::JsValue::AsBool() const
+template <> bool AdblockPlus::JSVALUEV8::AsBool() const
 {
   const JsContext context(*jsEngine);
   return UnwrapValue()->BooleanValue();
 }
 
-AdblockPlus::JsValueList AdblockPlus::JsValue::AsList() const
+template <> AdblockPlus::JsValueList AdblockPlus::JSVALUEV8::AsList() const
 {
   if (!IsArray())
     throw std::runtime_error("Cannot convert a non-array to list");
 
   const JsContext context(*jsEngine);
   JsValueList result;
   v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(UnwrapValue());
   uint32_t length = array->Length();
   for (uint32_t i = 0; i < length; i++)
   {
     v8::Local<v8::Value> item = array->Get(i);
     result.push_back(JsValue(jsEngine, item));
   }
   return result;
 }
 
-std::vector<std::string> AdblockPlus::JsValue::GetOwnPropertyNames() const
+template <> std::vector<std::string> AdblockPlus::JSVALUEV8::GetOwnPropertyNames() const
 {
   if (!IsObject())
     throw std::runtime_error("Attempting to get propert list for a non-object");
 
   const JsContext context(*jsEngine);
   v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(UnwrapValue());
   JsValueList properties = JsValue(jsEngine, object->GetOwnPropertyNames()).AsList();
   std::vector<std::string> result;
   for (const auto& property : properties)
     result.push_back(property.AsString());
   return result;
 }
 
 
-AdblockPlus::JsValue AdblockPlus::JsValue::GetProperty(const std::string& name) const
+template <> AdblockPlus::JsValue AdblockPlus::JSVALUEV8::GetProperty(const std::string& name) const
 {
   if (!IsObject())
     throw std::runtime_error("Attempting to get property of a non-object");
 
   const JsContext context(*jsEngine);
   v8::Local<v8::String> property = Utils::ToV8String(jsEngine->GetIsolate(), name);
   v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(UnwrapValue());
   return JsValue(jsEngine, obj->Get(property));
 }
 
-void AdblockPlus::JsValue::SetProperty(const std::string& name, v8::Handle<v8::Value> val)
+template <> void AdblockPlus::JSVALUEV8::SetProperty(const std::string& name, v8::Handle<v8::Value> val)
 {
   if (!IsObject())
     throw std::runtime_error("Attempting to set property on a non-object");
 
   v8::Local<v8::String> property = Utils::ToV8String(jsEngine->GetIsolate(), name);
   v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(UnwrapValue());
   obj->Set(property, val);
 }
 
-v8::Local<v8::Value> AdblockPlus::JsValue::UnwrapValue() const
+template <> JsEngineNamespaceImpl::LocalValue AdblockPlus::JSVALUEV8::UnwrapValue() const
 {
   return v8::Local<v8::Value>::New(jsEngine->GetIsolate(), *value);
 }
 
-void AdblockPlus::JsValue::SetProperty(const std::string& name, const std::string& val)
+template <> void AdblockPlus::JSVALUEV8::SetProperty(const std::string& name, const std::string& val)
 {
   const JsContext context(*jsEngine);
   SetProperty(name, Utils::ToV8String(jsEngine->GetIsolate(), val));
 }
 
-void AdblockPlus::JsValue::SetStringBufferProperty(const std::string& name, const StringBuffer& val)
+template <> void AdblockPlus::JSVALUEV8::SetStringBufferProperty(const std::string& name, const StringBuffer& val)
 {
   const JsContext context(*jsEngine);
   SetProperty(name, Utils::StringBufferToV8String(jsEngine->GetIsolate(), val));
 }
 
-void AdblockPlus::JsValue::SetProperty(const std::string& name, int64_t val)
+template <> void AdblockPlus::JSVALUEV8::SetProperty(const std::string& name, int64_t val)
 {
   const JsContext context(*jsEngine);
   SetProperty(name, v8::Number::New(jsEngine->GetIsolate(), val));
 }
 
-void AdblockPlus::JsValue::SetProperty(const std::string& name, const JsValue& val)
+template <> void AdblockPlus::JSVALUEV8::SetProperty(const std::string& name, const JsValue& val)
 {
   const JsContext context(*jsEngine);
   SetProperty(name, val.UnwrapValue());
 }
 
-void AdblockPlus::JsValue::SetProperty(const std::string& name, bool val)
+template <> void AdblockPlus::JSVALUEV8::SetProperty(const std::string& name, bool val)
 {
   const JsContext context(*jsEngine);
   SetProperty(name, v8::Boolean::New(jsEngine->GetIsolate(), val));
 }
 
-std::string AdblockPlus::JsValue::GetClass() const
+template <> std::string AdblockPlus::JSVALUEV8::GetClass() const
 {
   if (!IsObject())
     throw std::runtime_error("Cannot get constructor of a non-object");
 
   const JsContext context(*jsEngine);
   v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(UnwrapValue());
   return Utils::FromV8String(obj->GetConstructorName());
 }
 
-JsValue JsValue::Call(const JsValueList& params) const
+template <> JsValue JSVALUEV8::Call(const JsValueList& params) const
 {
   const JsContext context(*jsEngine);
   std::vector<v8::Handle<v8::Value>> argv;
   for (const auto& param : params)
     argv.push_back(param.UnwrapValue());
 
-  return Call(argv, context.GetV8Context()->Global());
+  return Call(argv, context.GetJSEngineContext()->Global());
 }
 
-JsValue JsValue::Call(const JsValueList& params, const JsValue& thisValue) const
+template <> JsValue JSVALUEV8::Call(const JsValueList& params, const JsValue& thisValue) const
 {
   const JsContext context(*jsEngine);
   v8::Local<v8::Object> thisObj = v8::Local<v8::Object>::Cast(thisValue.UnwrapValue());
 
   std::vector<v8::Handle<v8::Value>> argv;
   for (const auto& param : params)
     argv.push_back(param.UnwrapValue());
 
   return Call(argv, thisObj);
 }
 
-JsValue JsValue::Call(const JsValue& arg) const
+template <> JsValue JSVALUEV8::Call(const JsValue& arg) const
 {
   const JsContext context(*jsEngine);
 
   std::vector<v8::Handle<v8::Value>> argv;
   argv.push_back(arg.UnwrapValue());
 
-  return Call(argv, context.GetV8Context()->Global());
+  return Call(argv, context.GetJSEngineContext()->Global());
 }
 
-JsValue JsValue::Call(std::vector<v8::Handle<v8::Value>>& args, v8::Local<v8::Object> thisObj) const
+template <> JsValue JSVALUEV8::Call(std::vector<v8::Handle<v8::Value>>& args, v8::Local<v8::Object> thisObj) const
 {
   if (!IsFunction())
     throw std::runtime_error("Attempting to call a non-function");
   if (!thisObj->IsObject())
     throw std::runtime_error("`this` pointer has to be an object");
 
   const JsContext context(*jsEngine);
 
   const v8::TryCatch tryCatch;
   v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(UnwrapValue());
   v8::Local<v8::Value> result = func->Call(thisObj, args.size(),
     args.size() ? &args[0] : nullptr);
 
   if (tryCatch.HasCaught())
     throw JsError(tryCatch.Exception(), tryCatch.Message());
 
   return JsValue(jsEngine, result);
 }