Move webkit/plugins/ppapi to content/renderer/pepper.

webkit/plugins/ppapi/plugin_object.cc

-// 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 "webkit/plugins/ppapi/plugin_object.h"
-
-#include "base/logging.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
-#include "ppapi/c/dev/ppb_var_deprecated.h"
-#include "ppapi/c/dev/ppp_class_deprecated.h"
-#include "ppapi/c/pp_resource.h"
-#include "ppapi/c/pp_var.h"
-#include "ppapi/shared_impl/ppapi_globals.h"
-#include "ppapi/shared_impl/resource_tracker.h"
-#include "ppapi/shared_impl/var.h"
-#include "ppapi/shared_impl/var_tracker.h"
-#include "third_party/WebKit/public/web/WebBindings.h"
-#include "third_party/npapi/bindings/npapi.h"
-#include "third_party/npapi/bindings/npruntime.h"
-#include "webkit/plugins/ppapi/npapi_glue.h"
-#include "webkit/plugins/ppapi/plugin_module.h"
-#include "webkit/plugins/ppapi/ppapi_plugin_instance_impl.h"
-
-using ppapi::PpapiGlobals;
-using ppapi::StringVar;
-using ppapi::Var;
-using WebKit::WebBindings;
-
-namespace webkit {
-namespace ppapi {
-
-namespace {
-
-const char kInvalidValueException[] = "Error: Invalid value";
-
-// NPObject implementation in terms of PPP_Class_Deprecated --------------------
-
-NPObject* WrapperClass_Allocate(NPP npp, NPClass* unused) {
-  return PluginObject::AllocateObjectWrapper();
-}
-
-void WrapperClass_Deallocate(NPObject* np_object) {
-  PluginObject* plugin_object = PluginObject::FromNPObject(np_object);
-  if (!plugin_object)
-    return;
-  plugin_object->ppp_class()->Deallocate(plugin_object->ppp_class_data());
-  delete plugin_object;
-}
-
-void WrapperClass_Invalidate(NPObject* object) {
-}
-
-bool WrapperClass_HasMethod(NPObject* object, NPIdentifier method_name) {
-  NPObjectAccessorWithIdentifier accessor(object, method_name, false);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), NULL);
-  bool rv = accessor.object()->ppp_class()->HasMethod(
-      accessor.object()->ppp_class_data(), accessor.identifier(),
-      result_converter.exception());
-  result_converter.CheckExceptionForNoResult();
-  return rv;
-}
-
-bool WrapperClass_Invoke(NPObject* object, NPIdentifier method_name,
-                         const NPVariant* argv, uint32_t argc,
-                         NPVariant* result) {
-  NPObjectAccessorWithIdentifier accessor(object, method_name, false);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), result);
-  PPVarArrayFromNPVariantArray args(accessor.object()->instance(),
-                                    argc, argv);
-
-  // For the OOP plugin case we need to grab a reference on the plugin module
-  // object to ensure that it is not destroyed courtsey an incoming
-  // ExecuteScript call which destroys the plugin module and in turn the
-  // dispatcher.
-  scoped_refptr<webkit::ppapi::PluginModule> ref(
-      accessor.object()->instance()->module());
-
-  return result_converter.SetResult(accessor.object()->ppp_class()->Call(
-      accessor.object()->ppp_class_data(), accessor.identifier(),
-      argc, args.array(), result_converter.exception()));
-}
-
-bool WrapperClass_InvokeDefault(NPObject* np_object, const NPVariant* argv,
-                                uint32_t argc, NPVariant* result) {
-  PluginObject* obj = PluginObject::FromNPObject(np_object);
-  if (!obj)
-    return false;
-
-  PPVarArrayFromNPVariantArray args(obj->instance(), argc, argv);
-  PPResultAndExceptionToNPResult result_converter(obj->GetNPObject(), result);
-
-  // For the OOP plugin case we need to grab a reference on the plugin module
-  // object to ensure that it is not destroyed courtsey an incoming
-  // ExecuteScript call which destroys the plugin module and in turn the
-  // dispatcher.
-  scoped_refptr<webkit::ppapi::PluginModule> ref(
-      obj->instance()->module());
-
-  result_converter.SetResult(obj->ppp_class()->Call(
-      obj->ppp_class_data(), PP_MakeUndefined(), argc, args.array(),
-      result_converter.exception()));
-  return result_converter.success();
-}
-
-bool WrapperClass_HasProperty(NPObject* object, NPIdentifier property_name) {
-  NPObjectAccessorWithIdentifier accessor(object, property_name, true);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), NULL);
-  bool rv = accessor.object()->ppp_class()->HasProperty(
-      accessor.object()->ppp_class_data(), accessor.identifier(),
-      result_converter.exception());
-  result_converter.CheckExceptionForNoResult();
-  return rv;
-}
-
-bool WrapperClass_GetProperty(NPObject* object, NPIdentifier property_name,
-                              NPVariant* result) {
-  NPObjectAccessorWithIdentifier accessor(object, property_name, true);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), result);
-  return result_converter.SetResult(accessor.object()->ppp_class()->GetProperty(
-      accessor.object()->ppp_class_data(), accessor.identifier(),
-      result_converter.exception()));
-}
-
-bool WrapperClass_SetProperty(NPObject* object, NPIdentifier property_name,
-                              const NPVariant* value) {
-  NPObjectAccessorWithIdentifier accessor(object, property_name, true);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), NULL);
-  PP_Var value_var = NPVariantToPPVar(accessor.object()->instance(), value);
-  accessor.object()->ppp_class()->SetProperty(
-      accessor.object()->ppp_class_data(), accessor.identifier(), value_var,
-      result_converter.exception());
-  PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(value_var);
-  return result_converter.CheckExceptionForNoResult();
-}
-
-bool WrapperClass_RemoveProperty(NPObject* object, NPIdentifier property_name) {
-  NPObjectAccessorWithIdentifier accessor(object, property_name, true);
-  if (!accessor.is_valid())
-    return false;
-
-  PPResultAndExceptionToNPResult result_converter(
-      accessor.object()->GetNPObject(), NULL);
-  accessor.object()->ppp_class()->RemoveProperty(
-      accessor.object()->ppp_class_data(), accessor.identifier(),
-      result_converter.exception());
-  return result_converter.CheckExceptionForNoResult();
-}
-
-bool WrapperClass_Enumerate(NPObject* object, NPIdentifier** values,
-                            uint32_t* count) {
-  *values = NULL;
-  *count = 0;
-  PluginObject* obj = PluginObject::FromNPObject(object);
-  if (!obj)
-    return false;
-
-  uint32_t property_count = 0;
-  PP_Var* properties = NULL;  // Must be freed!
-  PPResultAndExceptionToNPResult result_converter(obj->GetNPObject(), NULL);
-  obj->ppp_class()->GetAllPropertyNames(obj->ppp_class_data(),
-                                        &property_count, &properties,
-                                        result_converter.exception());
-
-  // Convert the array of PP_Var to an array of NPIdentifiers. If any
-  // conversions fail, we will set the exception.
-  if (!result_converter.has_exception()) {
-    if (property_count > 0) {
-      *values = static_cast<NPIdentifier*>(
-          malloc(sizeof(NPIdentifier) * property_count));
-      *count = 0;  // Will be the number of items successfully converted.
-      for (uint32_t i = 0; i < property_count; ++i) {
-        if (!((*values)[i] = PPVarToNPIdentifier(properties[i]))) {
-          // Throw an exception for the failed convertion.
-          *result_converter.exception() =
-              StringVar::StringToPPVar(kInvalidValueException);
-          break;
-        }
-        (*count)++;
-      }
-
-      if (result_converter.has_exception()) {
-        // We don't actually have to free the identifiers we converted since
-        // all identifiers leak anyway :( .
-        free(*values);
-        *values = NULL;
-        *count = 0;
-      }
-    }
-  }
-
-  // This will actually throw the exception, either from GetAllPropertyNames,
-  // or if anything was set during the conversion process.
-  result_converter.CheckExceptionForNoResult();
-
-  // Release the PP_Var that the plugin allocated. On success, they will all
-  // be converted to NPVariants, and on failure, we want them to just go away.
-  ::ppapi::VarTracker* var_tracker = PpapiGlobals::Get()->GetVarTracker();
-  for (uint32_t i = 0; i < property_count; ++i)
-    var_tracker->ReleaseVar(properties[i]);
-  free(properties);
-  return result_converter.success();
-}
-
-bool WrapperClass_Construct(NPObject* object, const NPVariant* argv,
-                            uint32_t argc, NPVariant* result) {
-  PluginObject* obj = PluginObject::FromNPObject(object);
-  if (!obj)
-    return false;
-
-  PPVarArrayFromNPVariantArray args(obj->instance(), argc, argv);
-  PPResultAndExceptionToNPResult result_converter(obj->GetNPObject(), result);
-  return result_converter.SetResult(obj->ppp_class()->Construct(
-      obj->ppp_class_data(), argc, args.array(),
-      result_converter.exception()));
-}
-
-const NPClass wrapper_class = {
-  NP_CLASS_STRUCT_VERSION,
-  WrapperClass_Allocate,
-  WrapperClass_Deallocate,
-  WrapperClass_Invalidate,
-  WrapperClass_HasMethod,
-  WrapperClass_Invoke,
-  WrapperClass_InvokeDefault,
-  WrapperClass_HasProperty,
-  WrapperClass_GetProperty,
-  WrapperClass_SetProperty,
-  WrapperClass_RemoveProperty,
-  WrapperClass_Enumerate,
-  WrapperClass_Construct
-};
-
-}  // namespace
-
-// PluginObject ----------------------------------------------------------------
-
-struct PluginObject::NPObjectWrapper : public NPObject {
-  // Points to the var object that owns this wrapper. This value may be NULL
-  // if there is no var owning this wrapper. This can happen if the plugin
-  // releases all references to the var, but a reference to the underlying
-  // NPObject is still held by script on the page.
-  PluginObject* obj;
-};
-
-PluginObject::PluginObject(PluginInstanceImpl* instance,
-                           NPObjectWrapper* object_wrapper,
-                           const PPP_Class_Deprecated* ppp_class,
-                           void* ppp_class_data)
-    : instance_(instance),
-      object_wrapper_(object_wrapper),
-      ppp_class_(ppp_class),
-      ppp_class_data_(ppp_class_data) {
-  // Make the object wrapper refer back to this class so our NPObject
-  // implementation can call back into the Pepper layer.
-  object_wrapper_->obj = this;
-  instance_->AddPluginObject(this);
-}
-
-PluginObject::~PluginObject() {
-  // The wrapper we made for this NPObject may still have a reference to it
-  // from JavaScript, so we clear out its ObjectVar back pointer which will
-  // cause all calls "up" to the plugin to become NOPs. Our ObjectVar base
-  // class will release our reference to the object, which may or may not
-  // delete the NPObject.
-  DCHECK(object_wrapper_->obj == this);
-  object_wrapper_->obj = NULL;
-  instance_->RemovePluginObject(this);
-}
-
-PP_Var PluginObject::Create(PluginInstanceImpl* instance,
-                            const PPP_Class_Deprecated* ppp_class,
-                            void* ppp_class_data) {
-  // This will internally end up calling our AllocateObjectWrapper via the
-  // WrapperClass_Allocated function which will have created an object wrapper
-  // appropriate for this class (derived from NPObject).
-  NPObjectWrapper* wrapper = static_cast<NPObjectWrapper*>(
-      WebBindings::createObject(instance->instanceNPP(),
-      const_cast<NPClass*>(&wrapper_class)));
-
-  // This object will register itself both with the NPObject and with the
-  // PluginModule. The NPObject will normally handle its lifetime, and it
-  // will get deleted in the destroy method. It may also get deleted when the
-  // plugin module is deallocated.
-  new PluginObject(instance, wrapper, ppp_class, ppp_class_data);
-
-  // We can just use a normal ObjectVar to refer to this object from the
-  // plugin. It will hold a ref to the underlying NPObject which will in turn
-  // hold our pluginObject.
-  PP_Var obj_var(NPObjectToPPVar(instance, wrapper));
-
-  // Note that the ObjectVar constructor incremented the reference count, and so
-  // did WebBindings::createObject above. Now that the PP_Var has taken
-  // ownership, we need to release to balance out the createObject reference
-  // count bump.
-  WebBindings::releaseObject(wrapper);
-  return obj_var;
-}
-
-NPObject* PluginObject::GetNPObject() const {
-  return object_wrapper_;
-}
-
-// static
-bool PluginObject::IsInstanceOf(NPObject* np_object,
-                                const PPP_Class_Deprecated* ppp_class,
-                                void** ppp_class_data) {
-  // Validate that this object is implemented by our wrapper class before
-  // trying to get the PluginObject.
-  if (np_object->_class != &wrapper_class)
-    return false;
-
-  PluginObject* plugin_object = FromNPObject(np_object);
-  if (!plugin_object)
-    return false;  // Object is no longer alive.
-
-  if (plugin_object->ppp_class() != ppp_class)
-    return false;
-  if (ppp_class_data)
-    *ppp_class_data = plugin_object->ppp_class_data();
-  return true;
-}
-
-// static
-PluginObject* PluginObject::FromNPObject(NPObject* object) {
-  return static_cast<NPObjectWrapper*>(object)->obj;
-}
-
-// static
-NPObject* PluginObject::AllocateObjectWrapper() {
-  NPObjectWrapper* wrapper = new NPObjectWrapper;
-  memset(wrapper, 0, sizeof(NPObjectWrapper));
-  return wrapper;
-}
-
-}  // namespace ppapi
-}  // namespace webkit
-