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Unified Diff: content/renderer/pepper/plugin_object.cc

Issue 512983004: Revert of Replace NPObject usage in ppapi with gin (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 4 months ago
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Index: content/renderer/pepper/plugin_object.cc
diff --git a/content/renderer/pepper/plugin_object.cc b/content/renderer/pepper/plugin_object.cc
index 7260b01bb0bf75d6ef81f9e24f76026a05d7de2e..256c0a3fd76e8813a963e334212dd7ca23240a53 100644
--- a/content/renderer/pepper/plugin_object.cc
+++ b/content/renderer/pepper/plugin_object.cc
@@ -4,23 +4,14 @@
#include "content/renderer/pepper/plugin_object.h"
-#include "base/bind.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 "content/renderer/pepper/npapi_glue.h"
#include "content/renderer/pepper/pepper_plugin_instance_impl.h"
-#include "content/renderer/pepper/pepper_try_catch.h"
#include "content/renderer/pepper/plugin_module.h"
-#include "content/renderer/pepper/v8_var_converter.h"
-#include "gin/arguments.h"
-#include "gin/converter.h"
-#include "gin/function_template.h"
-#include "gin/handle.h"
-#include "gin/interceptor.h"
-#include "gin/object_template_builder.h"
-#include "gin/public/gin_embedders.h"
#include "ppapi/c/dev/ppb_var_deprecated.h"
#include "ppapi/c/dev/ppp_class_deprecated.h"
#include "ppapi/c/pp_resource.h"
@@ -29,12 +20,14 @@
#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"
using ppapi::PpapiGlobals;
-using ppapi::ScopedPPVar;
-using ppapi::ScopedPPVarArray;
using ppapi::StringVar;
using ppapi::Var;
+using blink::WebBindings;
namespace content {
@@ -42,191 +35,333 @@
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) {
+ plugin_object->ppp_class()->Deallocate(plugin_object->ppp_class_data());
+ delete plugin_object;
+ }
+ delete np_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<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<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*>(
+ calloc(property_count, sizeof(NPIdentifier)));
+ *count = 0; // Will be the number of items successfully converted.
+ for (uint32_t i = 0; i < property_count; ++i) {
+ (*values)[i] = PPVarToNPIdentifier(properties[i]);
+ if (!(*values)[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(PepperPluginInstanceImpl* 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() {
- if (instance_) {
- ppp_class_->Deallocate(ppp_class_data_);
- instance_->RemovePluginObject(this);
- }
-}
-
-// static
-gin::WrapperInfo PluginObject::kWrapperInfo = {gin::kEmbedderNativeGin};
-
-// static
-PluginObject* PluginObject::FromV8Object(v8::Isolate* isolate,
- v8::Handle<v8::Object> v8_object) {
- PluginObject* plugin_object;
- if (!v8_object.IsEmpty() &&
- gin::ConvertFromV8(isolate, v8_object, &plugin_object)) {
- return plugin_object;
- }
- return NULL;
-}
-
-// static
+ // 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(PepperPluginInstanceImpl* instance,
const PPP_Class_Deprecated* ppp_class,
void* ppp_class_data) {
- PepperTryCatchVar try_catch(instance, NULL);
- gin::Handle<PluginObject> object =
- gin::CreateHandle(instance->GetIsolate(),
- new PluginObject(instance, ppp_class, ppp_class_data));
- ScopedPPVar result = try_catch.FromV8(object.ToV8());
- DCHECK(!try_catch.HasException());
- return result.Release();
-}
-
-v8::Local<v8::Value> PluginObject::GetNamedProperty(
- v8::Isolate* isolate,
- const std::string& identifier) {
- ScopedPPVar identifier_var(ScopedPPVar::PassRef(),
- StringVar::StringToPPVar(identifier));
- return GetPropertyOrMethod(instance_->GetIsolate(), identifier_var.get());
-}
-
-std::vector<std::string> PluginObject::EnumerateNamedProperties(
- v8::Isolate* isolate) {
- std::vector<std::string> result;
- if (!instance_)
- return result;
-
- PepperTryCatchV8 try_catch(instance_, V8VarConverter::kAllowObjectVars,
- isolate);
-
- PP_Var* name_vars;
- uint32_t count = 0;
- ppp_class_->GetAllPropertyNames(ppp_class_data_, &count, &name_vars,
- try_catch.exception());
- ScopedPPVarArray scoped_name_vars(
- ScopedPPVarArray::PassPPBMemoryAllocatedArray(), name_vars, count);
-
- if (try_catch.ThrowException())
- return result;
-
- for (uint32_t i = 0; i < count; ++i) {
- StringVar* string_var = StringVar::FromPPVar(name_vars[i]);
- if (string_var) {
- result.push_back(string_var->value());
- } else {
- try_catch.ThrowException(kInvalidValueException);
- result.clear();
- return result;
- }
- }
-
- return result;
-}
-
-void PluginObject::InstanceDeleted() {
- instance_ = NULL;
-}
-
-PluginObject::PluginObject(PepperPluginInstanceImpl* instance,
- const PPP_Class_Deprecated* ppp_class,
- void* ppp_class_data)
- : gin::NamedPropertyInterceptor(instance->GetIsolate(), this),
- instance_(instance),
- ppp_class_(ppp_class),
- ppp_class_data_(ppp_class_data),
- weak_factory_(this) {
- instance_->AddPluginObject(this);
-}
-
-gin::ObjectTemplateBuilder PluginObject::GetObjectTemplateBuilder(
- v8::Isolate* isolate) {
- return Wrappable<PluginObject>::GetObjectTemplateBuilder(isolate)
- .AddNamedPropertyInterceptor();
-}
-
-v8::Local<v8::Value> PluginObject::GetPropertyOrMethod(v8::Isolate* isolate,
- PP_Var identifier_var) {
- if (!instance_)
- return v8::Local<v8::Value>();
-
- PepperTryCatchV8 try_catch(instance_, V8VarConverter::kAllowObjectVars,
- isolate);
- bool has_property =
- ppp_class_->HasProperty(ppp_class_data_, identifier_var,
- try_catch.exception());
- if (try_catch.ThrowException())
- return v8::Local<v8::Value>();
-
- if (has_property) {
- ScopedPPVar result_var(ScopedPPVar::PassRef(),
- ppp_class_->GetProperty(ppp_class_data_, identifier_var,
- try_catch.exception()));
- if (try_catch.ThrowException())
- return v8::Local<v8::Value>();
-
- v8::Handle<v8::Value> result = try_catch.ToV8(result_var.get());
- if (try_catch.ThrowException())
- return v8::Local<v8::Value>();
-
- return result;
- }
-
- bool has_method = identifier_var.type == PP_VARTYPE_STRING &&
- ppp_class_->HasMethod(ppp_class_data_, identifier_var,
- try_catch.exception());
- if (try_catch.ThrowException())
- return v8::Local<v8::Value>();
-
- if (has_method) {
- const std::string& identifier =
- StringVar::FromPPVar(identifier_var)->value();
- return gin::CreateFunctionTemplate(isolate,
- base::Bind(&PluginObject::Call,
- weak_factory_.GetWeakPtr(),
- identifier))->GetFunction();
- }
-
- return v8::Local<v8::Value>();
-}
-
-void PluginObject::Call(const std::string& identifier,
- gin::Arguments* args) {
- if (!instance_)
- return;
-
- PepperTryCatchV8 try_catch(instance_, V8VarConverter::kAllowObjectVars,
- args->isolate());
- ScopedPPVar identifier_var(ScopedPPVar::PassRef(),
- StringVar::StringToPPVar(identifier));
- ScopedPPVarArray argument_vars(args->Length());
-
- for (uint32_t i = 0; i < argument_vars.size(); ++i) {
- v8::Handle<v8::Value> arg;
- if (!args->GetNext(&arg)) {
- NOTREACHED();
- }
-
- argument_vars.Set(i, try_catch.FromV8(arg));
- if (try_catch.ThrowException())
- return;
- }
-
- // For the OOP plugin case we need to grab a reference on the plugin module
- // object to ensure that it is not destroyed courtesy an incoming
- // ExecuteScript call which destroys the plugin module and in turn the
- // dispatcher.
- scoped_refptr<PluginModule> ref(instance_->module());
-
- ScopedPPVar result_var(ScopedPPVar::PassRef(),
- ppp_class_->Call(ppp_class_data_, identifier_var.get(),
- argument_vars.size(), argument_vars.get(),
- try_catch.exception()));
- if (try_catch.ThrowException())
- return;
-
- v8::Handle<v8::Value> result = try_catch.ToV8(result_var.get());
- if (try_catch.ThrowException())
- return;
-
- args->Return(result);
+ // 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 content
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