jsni-env-ext.h

// JavaScript Native Interface Release License.
//
// Copyright (c) 2015-2017 Alibaba Group. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the Alibaba Group nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef SRC_V8_JSNI_ENV_EXT_H_
#define SRC_V8_JSNI_ENV_EXT_H_

#include "jsni.h"
#include "v8.h"

#include <vector>

namespace v8 {

class JsLocalScopeBase {
 public:
  explicit JsLocalScopeBase(bool is_escapable) : is_escapable_(is_escapable) {}
  bool IsEscapable() {
    return is_escapable_;
  }
 private:
  bool is_escapable_;
};

class JsLocalScope : public JsLocalScopeBase {
 public:
  explicit JsLocalScope(v8::Isolate* isolate)
             :JsLocalScopeBase(false), scope(isolate) {}

 private:
  v8::HandleScope scope;
};

class JsEscapableLocalScope : public JsLocalScopeBase {
 public:
  explicit JsEscapableLocalScope(v8::Isolate* isolate)
             :JsLocalScopeBase(true), scope(isolate) {}

  v8::Local<Value> Escape(v8::Local<Value> handle) {
    return scope.Escape(handle);
  }

 private:
  v8::EscapableHandleScope scope;
};

struct JSNIEnvExt : public _JSNIEnv {
  Isolate* isolate_;
  // To push/pop local frame.
  std::vector<JsLocalScopeBase*> stacked_local_scope;
  // For error check.
  int error_code;
  JSNIErrorInfo last_error_info;
  v8::Persistent<v8::Value> last_exception;
};

}  // namespace v8

#endif  // SRC_V8_JSNI_ENV_EXT_H_