root/ppapi/cpp/dev/scriptable_object_deprecated.cc

DEFINITIONS

1. Get
2. ArgListToVector
3. HasProperty
4. HasMethod
5. GetProperty
6. GetAllPropertyNames
7. SetProperty
8. RemoveProperty
9. Call
10. Construct
11. Deallocate
12. HasProperty
13. HasMethod
14. GetProperty
15. GetAllPropertyNames
16. SetProperty
17. RemoveProperty
18. Call
19. Construct
20. GetClass

// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ppapi/cpp/dev/scriptable_object_deprecated.h"
#include "ppapi/c/dev/ppb_memory_dev.h"
#include "ppapi/c/dev/ppp_class_deprecated.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/var.h"

namespace pp {

namespace deprecated {

namespace {

// Allows converting an output param of a Var to an output param of a PP_Var
// for exceptions. The object is only copied if it is not void, which we
// take to mean an exception occurred.
class ExceptionConverter {
 public:
  ExceptionConverter(PP_Var* out) : out_(out) {
  }
  ~ExceptionConverter() {
    if (!exception_.is_undefined())
      *out_ = exception_.Detach();
  }

  Var* Get() { return &exception_; }

 private:
  PP_Var* out_;
  Var exception_;
};

// Used internally to convert a C-style array of PP_Var to a vector of Var.
void ArgListToVector(uint32_t argc, PP_Var* argv, std::vector<Var>* output) {
  output->reserve(argc);
  for (size_t i = 0; i < argc; i++)
    output->push_back(Var(Var::DontManage(), argv[i]));
}

bool HasProperty(void* object, PP_Var name, PP_Var* exception) {
  ExceptionConverter e(exception);
  return static_cast<ScriptableObject*>(object)->HasProperty(
      Var(Var::DontManage(), name), e.Get());
}

bool HasMethod(void* object, PP_Var name, PP_Var* exception) {
  ExceptionConverter e(exception);
  return static_cast<ScriptableObject*>(object)->HasMethod(
      Var(Var::DontManage(), name), e.Get());
}

PP_Var GetProperty(void* object,
                   PP_Var name,
                   PP_Var* exception) {
  ExceptionConverter e(exception);
  return static_cast<ScriptableObject*>(object)->GetProperty(
      Var(Var::DontManage(), name), e.Get()).Detach();
}

void GetAllPropertyNames(void* object,
                         uint32_t* property_count,
                         PP_Var** properties,
                         PP_Var* exception) {
  ExceptionConverter e(exception);
  std::vector<Var> props;
  static_cast<ScriptableObject*>(object)->GetAllPropertyNames(&props, e.Get());
  if (props.empty())
    return;
  *property_count = static_cast<uint32_t>(props.size());

  const PPB_Memory_Dev* memory_if = static_cast<const PPB_Memory_Dev*>(
      pp::Module::Get()->GetBrowserInterface(PPB_MEMORY_DEV_INTERFACE));
  *properties = static_cast<PP_Var*>(
      memory_if->MemAlloc(sizeof(PP_Var) * props.size()));

  for (size_t i = 0; i < props.size(); ++i)
    (*properties)[i] = props[i].Detach();
}

void SetProperty(void* object,
                 PP_Var name,
                 PP_Var value,
                 PP_Var* exception) {
  ExceptionConverter e(exception);
  static_cast<ScriptableObject*>(object)->SetProperty(
      Var(Var::DontManage(), name), Var(Var::DontManage(), value), e.Get());
}

void RemoveProperty(void* object,
                    PP_Var name,
                    PP_Var* exception) {
  ExceptionConverter e(exception);
  static_cast<ScriptableObject*>(object)->RemoveProperty(
      Var(Var::DontManage(), name), e.Get());
}

PP_Var Call(void* object,
            PP_Var method_name,
            uint32_t argc,
            PP_Var* argv,
            PP_Var* exception) {
  ExceptionConverter e(exception);

  std::vector<Var> args;
  ArgListToVector(argc, argv, &args);
  return static_cast<ScriptableObject*>(object)->Call(
      Var(Var::DontManage(), method_name), args, e.Get()).Detach();
}

PP_Var Construct(void* object,
                 uint32_t argc,
                 PP_Var* argv,
                 PP_Var* exception) {
  ExceptionConverter e(exception);

  std::vector<Var> args;
  ArgListToVector(argc, argv, &args);
  return static_cast<ScriptableObject*>(object)->Construct(
      args, e.Get()).Detach();
}

void Deallocate(void* object) {
  delete static_cast<ScriptableObject*>(object);
}

PPP_Class_Deprecated plugin_class = {
  &HasProperty,
  &HasMethod,
  &GetProperty,
  &GetAllPropertyNames,
  &SetProperty,
  &RemoveProperty,
  &Call,
  &Construct,
  &Deallocate
};

}  // namespace

bool ScriptableObject::HasProperty(const Var& /*name*/, Var* /*exception*/) {
  return false;
}

bool ScriptableObject::HasMethod(const Var& /*name*/, Var* /*exception*/) {
  return false;
}

Var ScriptableObject::GetProperty(const Var& /*name*/, Var* exception) {
  *exception = Var("Property does not exist on ScriptableObject");
  return Var();
}

void ScriptableObject::GetAllPropertyNames(std::vector<Var>* /*properties*/,
                                           Var* /*exception*/) {
}

void ScriptableObject::SetProperty(const Var& /*name*/,
                                   const Var& /*value*/,
                                   Var* exception) {
  *exception = Var("Property can not be set on ScriptableObject");
}

void ScriptableObject::RemoveProperty(const Var& /*name*/,
                                      Var* exception) {
  *exception = Var(
      "Property does does not exist to be removed in ScriptableObject");
}

Var ScriptableObject::Call(const Var& /*method_name*/,
                           const std::vector<Var>& /*args*/,
                           Var* exception) {
  *exception = Var("Method does not exist to call in ScriptableObject");
  return Var();
}

Var ScriptableObject::Construct(const std::vector<Var>& /*args*/,
                                Var* exception) {
  *exception = Var("Construct method does not exist in ScriptableObject");
  return Var();
}

// static
const PPP_Class_Deprecated* ScriptableObject::GetClass() {
  return &plugin_class;
}

}  // namespace deprecated

}  // namespace pp