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// Copyright (c) 2006-2008 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.
#ifndef GPU_NP_UTILS_DEFAULT_NP_OBJECT_H_
#define GPU_NP_UTILS_DEFAULT_NP_OBJECT_H_
#include "base/basictypes.h"
#include "gpu/np_utils/np_headers.h"
namespace np_utils {
class BaseNPDispatcher;
// This class implements each of the functions in the NPClass interface. They
// all return error by default. Note that these are not virtual functions and
// this is not an interface. This class can be used as a mixin so that an
// NPObject class does not need to implement every NPClass function but rather
// inherits a default from DefaultNPObject.
template <typename RootClass>
class DefaultNPObject : public RootClass {
public:
void Invalidate() {}
bool HasMethod(NPIdentifier name) {
return false;
}
bool Invoke(NPIdentifier name,
const NPVariant* args,
uint32_t num_args,
NPVariant* result) {
return false;
}
bool InvokeDefault(const NPVariant* args,
uint32_t num_args,
NPVariant* result) {
return false;
}
bool HasProperty(NPIdentifier name) {
return false;
}
bool GetProperty(NPIdentifier name, NPVariant* result) {
return false;
}
bool SetProperty(NPIdentifier name, const NPVariant* value) {
return false;
}
bool RemoveProperty(NPIdentifier name) {
return false;
}
bool Enumerate(NPIdentifier** names,
uint32_t* count) {
*names = NULL;
*count = 0;
return true;
}
bool Construct(const NPVariant* args,
uint32_t num_args,
NPVariant* result) {
return false;
}
static BaseNPDispatcher* GetDispatcherChain() {
return NULL;
}
protected:
DefaultNPObject() {}
virtual ~DefaultNPObject() {}
private:
DISALLOW_COPY_AND_ASSIGN(DefaultNPObject);
};
} // namespace np_utils
#endif // GPU_NP_UTILS_DEFAULT_NP_OBJECT_H_
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